Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1 | /* |
| 2 | * drm_irq.c IRQ and vblank support |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| 5 | * \author Gareth Hughes <gareth@valinux.com> |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com |
| 10 | * |
| 11 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. |
| 12 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| 13 | * All Rights Reserved. |
| 14 | * |
| 15 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 16 | * copy of this software and associated documentation files (the "Software"), |
| 17 | * to deal in the Software without restriction, including without limitation |
| 18 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 19 | * and/or sell copies of the Software, and to permit persons to whom the |
| 20 | * Software is furnished to do so, subject to the following conditions: |
| 21 | * |
| 22 | * The above copyright notice and this permission notice (including the next |
| 23 | * paragraph) shall be included in all copies or substantial portions of the |
| 24 | * Software. |
| 25 | * |
| 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 27 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 28 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 29 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 30 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 31 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 32 | * OTHER DEALINGS IN THE SOFTWARE. |
| 33 | */ |
| 34 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 35 | #include <drm/drmP.h> |
Jesse Barnes | ac2874b | 2010-07-01 16:47:31 -0700 | [diff] [blame] | 36 | #include "drm_trace.h" |
Daniel Vetter | 1888299 | 2014-09-10 08:16:10 +0200 | [diff] [blame] | 37 | #include "drm_internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #include <linux/interrupt.h> /* For task queue support */ |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Dave Airlie | 28d5204 | 2009-09-21 14:33:58 +1000 | [diff] [blame] | 42 | #include <linux/vgaarb.h> |
Paul Gortmaker | 2d1a8a4 | 2011-08-30 18:16:33 -0400 | [diff] [blame] | 43 | #include <linux/export.h> |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 44 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 45 | /* Retry timestamp calculation up to 3 times to satisfy |
| 46 | * drm_timestamp_precision before giving up. |
| 47 | */ |
| 48 | #define DRM_TIMESTAMP_MAXRETRIES 3 |
| 49 | |
| 50 | /* Threshold in nanoseconds for detection of redundant |
| 51 | * vblank irq in drm_handle_vblank(). 1 msec should be ok. |
| 52 | */ |
| 53 | #define DRM_REDUNDANT_VBLIRQ_THRESH_NS 1000000 |
| 54 | |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 55 | static bool |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 56 | drm_get_last_vbltimestamp(struct drm_device *dev, unsigned int pipe, |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 57 | struct timeval *tvblank, unsigned flags); |
| 58 | |
Daniel Vetter | 1888299 | 2014-09-10 08:16:10 +0200 | [diff] [blame] | 59 | static unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
| 60 | |
| 61 | /* |
| 62 | * Default to use monotonic timestamps for wait-for-vblank and page-flip |
| 63 | * complete events. |
| 64 | */ |
| 65 | unsigned int drm_timestamp_monotonic = 1; |
| 66 | |
| 67 | static int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
| 68 | |
| 69 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
| 70 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); |
| 71 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
Dan Carpenter | d9d8c4c | 2016-01-08 14:00:45 +0300 | [diff] [blame] | 72 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs] (0: never disable, <0: disable immediately)"); |
| 73 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]"); |
| 74 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps"); |
Daniel Vetter | 1888299 | 2014-09-10 08:16:10 +0200 | [diff] [blame] | 75 | |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 76 | static void store_vblank(struct drm_device *dev, unsigned int pipe, |
Daniel Vetter | 209e4dbc | 2015-08-07 12:31:17 +0200 | [diff] [blame] | 77 | u32 vblank_count_inc, |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 78 | struct timeval *t_vblank, u32 last) |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 79 | { |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 80 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 81 | |
| 82 | assert_spin_locked(&dev->vblank_time_lock); |
| 83 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 84 | vblank->last = last; |
| 85 | |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 86 | write_seqlock(&vblank->seqlock); |
| 87 | vblank->time = *t_vblank; |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 88 | vblank->count += vblank_count_inc; |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 89 | write_sequnlock(&vblank->seqlock); |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 90 | } |
| 91 | |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 92 | /** |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 93 | * drm_reset_vblank_timestamp - reset the last timestamp to the last vblank |
| 94 | * @dev: DRM device |
| 95 | * @pipe: index of CRTC for which to reset the timestamp |
| 96 | * |
| 97 | * Reset the stored timestamp for the current vblank count to correspond |
| 98 | * to the last vblank occurred. |
| 99 | * |
| 100 | * Only to be called from drm_vblank_on(). |
| 101 | * |
| 102 | * Note: caller must hold dev->vbl_lock since this reads & writes |
| 103 | * device vblank fields. |
| 104 | */ |
| 105 | static void drm_reset_vblank_timestamp(struct drm_device *dev, unsigned int pipe) |
| 106 | { |
| 107 | u32 cur_vblank; |
| 108 | bool rc; |
| 109 | struct timeval t_vblank; |
| 110 | int count = DRM_TIMESTAMP_MAXRETRIES; |
| 111 | |
| 112 | spin_lock(&dev->vblank_time_lock); |
| 113 | |
| 114 | /* |
| 115 | * sample the current counter to avoid random jumps |
| 116 | * when drm_vblank_enable() applies the diff |
| 117 | */ |
| 118 | do { |
| 119 | cur_vblank = dev->driver->get_vblank_counter(dev, pipe); |
| 120 | rc = drm_get_last_vbltimestamp(dev, pipe, &t_vblank, 0); |
| 121 | } while (cur_vblank != dev->driver->get_vblank_counter(dev, pipe) && --count > 0); |
| 122 | |
| 123 | /* |
| 124 | * Only reinitialize corresponding vblank timestamp if high-precision query |
| 125 | * available and didn't fail. Otherwise reinitialize delayed at next vblank |
| 126 | * interrupt and assign 0 for now, to mark the vblanktimestamp as invalid. |
| 127 | */ |
| 128 | if (!rc) |
| 129 | t_vblank = (struct timeval) {0, 0}; |
| 130 | |
| 131 | /* |
| 132 | * +1 to make sure user will never see the same |
| 133 | * vblank counter value before and after a modeset |
| 134 | */ |
| 135 | store_vblank(dev, pipe, 1, &t_vblank, cur_vblank); |
| 136 | |
| 137 | spin_unlock(&dev->vblank_time_lock); |
| 138 | } |
| 139 | |
| 140 | /** |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 141 | * drm_update_vblank_count - update the master vblank counter |
| 142 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 143 | * @pipe: counter to update |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 144 | * |
| 145 | * Call back into the driver to update the appropriate vblank counter |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 146 | * (specified by @pipe). Deal with wraparound, if it occurred, and |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 147 | * update the last read value so we can deal with wraparound on the next |
| 148 | * call if necessary. |
| 149 | * |
| 150 | * Only necessary when going from off->on, to account for frames we |
| 151 | * didn't get an interrupt for. |
| 152 | * |
| 153 | * Note: caller must hold dev->vbl_lock since this reads & writes |
| 154 | * device vblank fields. |
| 155 | */ |
Ville Syrjälä | a6e610d | 2015-09-14 22:43:47 +0300 | [diff] [blame] | 156 | static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe, |
| 157 | unsigned long flags) |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 158 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 159 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 160 | u32 cur_vblank, diff; |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 161 | bool rc; |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 162 | struct timeval t_vblank; |
Ville Syrjälä | facfb06 | 2015-09-14 22:43:48 +0300 | [diff] [blame] | 163 | int count = DRM_TIMESTAMP_MAXRETRIES; |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 164 | int framedur_ns = vblank->framedur_ns; |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 165 | |
| 166 | /* |
| 167 | * Interrupts were disabled prior to this call, so deal with counter |
| 168 | * wrap if needed. |
Michel Dänzer | 5ceecb2 | 2015-05-26 17:53:38 +0900 | [diff] [blame] | 169 | * NOTE! It's possible we lost a full dev->max_vblank_count + 1 events |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 170 | * here if the register is small or we had vblank interrupts off for |
| 171 | * a long time. |
| 172 | * |
| 173 | * We repeat the hardware vblank counter & timestamp query until |
| 174 | * we get consistent results. This to prevent races between gpu |
| 175 | * updating its hardware counter while we are retrieving the |
| 176 | * corresponding vblank timestamp. |
| 177 | */ |
| 178 | do { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 179 | cur_vblank = dev->driver->get_vblank_counter(dev, pipe); |
Ville Syrjälä | a6e610d | 2015-09-14 22:43:47 +0300 | [diff] [blame] | 180 | rc = drm_get_last_vbltimestamp(dev, pipe, &t_vblank, flags); |
Ville Syrjälä | facfb06 | 2015-09-14 22:43:48 +0300 | [diff] [blame] | 181 | } while (cur_vblank != dev->driver->get_vblank_counter(dev, pipe) && --count > 0); |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 182 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 183 | if (dev->max_vblank_count != 0) { |
| 184 | /* trust the hw counter when it's around */ |
| 185 | diff = (cur_vblank - vblank->last) & dev->max_vblank_count; |
| 186 | } else if (rc && framedur_ns) { |
| 187 | const struct timeval *t_old; |
| 188 | u64 diff_ns; |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 189 | |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 190 | t_old = &vblank->time; |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 191 | diff_ns = timeval_to_ns(&t_vblank) - timeval_to_ns(t_old); |
| 192 | |
| 193 | /* |
| 194 | * Figure out how many vblanks we've missed based |
| 195 | * on the difference in the timestamps and the |
| 196 | * frame/field duration. |
| 197 | */ |
| 198 | diff = DIV_ROUND_CLOSEST_ULL(diff_ns, framedur_ns); |
| 199 | |
| 200 | if (diff == 0 && flags & DRM_CALLED_FROM_VBLIRQ) |
Ville Syrjälä | 235fabe | 2015-10-09 22:57:37 +0300 | [diff] [blame] | 201 | DRM_DEBUG_VBL("crtc %u: Redundant vblirq ignored." |
| 202 | " diff_ns = %lld, framedur_ns = %d)\n", |
| 203 | pipe, (long long) diff_ns, framedur_ns); |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 204 | } else { |
| 205 | /* some kind of default for drivers w/o accurate vbl timestamping */ |
| 206 | diff = (flags & DRM_CALLED_FROM_VBLIRQ) != 0; |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 207 | } |
| 208 | |
Mario Kleiner | 99b8e71 | 2016-02-12 20:30:28 +0100 | [diff] [blame] | 209 | /* |
Mario Kleiner | c61934e | 2016-02-12 20:30:29 +0100 | [diff] [blame] | 210 | * Within a drm_vblank_pre_modeset - drm_vblank_post_modeset |
| 211 | * interval? If so then vblank irqs keep running and it will likely |
| 212 | * happen that the hardware vblank counter is not trustworthy as it |
| 213 | * might reset at some point in that interval and vblank timestamps |
| 214 | * are not trustworthy either in that interval. Iow. this can result |
| 215 | * in a bogus diff >> 1 which must be avoided as it would cause |
| 216 | * random large forward jumps of the software vblank counter. |
| 217 | */ |
| 218 | if (diff > 1 && (vblank->inmodeset & 0x2)) { |
| 219 | DRM_DEBUG_VBL("clamping vblank bump to 1 on crtc %u: diffr=%u" |
| 220 | " due to pre-modeset.\n", pipe, diff); |
| 221 | diff = 1; |
| 222 | } |
| 223 | |
Ville Syrjälä | 235fabe | 2015-10-09 22:57:37 +0300 | [diff] [blame] | 224 | DRM_DEBUG_VBL("updating vblank count on crtc %u:" |
| 225 | " current=%u, diff=%u, hw=%u hw_last=%u\n", |
| 226 | pipe, vblank->count, diff, cur_vblank, vblank->last); |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 227 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 228 | if (diff == 0) { |
| 229 | WARN_ON_ONCE(cur_vblank != vblank->last); |
Mario Kleiner | da8f439 | 2014-09-13 18:25:54 +0200 | [diff] [blame] | 230 | return; |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 231 | } |
Mario Kleiner | da8f439 | 2014-09-13 18:25:54 +0200 | [diff] [blame] | 232 | |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 233 | /* |
| 234 | * Only reinitialize corresponding vblank timestamp if high-precision query |
Ville Syrjälä | fa4270d | 2015-09-30 19:21:34 +0300 | [diff] [blame] | 235 | * available and didn't fail, or we were called from the vblank interrupt. |
| 236 | * Otherwise reinitialize delayed at next vblank interrupt and assign 0 |
| 237 | * for now, to mark the vblanktimestamp as invalid. |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 238 | */ |
Ville Syrjälä | fa4270d | 2015-09-30 19:21:34 +0300 | [diff] [blame] | 239 | if (!rc && (flags & DRM_CALLED_FROM_VBLIRQ) == 0) |
Mario Kleiner | d66a1e3 | 2015-05-04 06:29:46 +0200 | [diff] [blame] | 240 | t_vblank = (struct timeval) {0, 0}; |
| 241 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 242 | store_vblank(dev, pipe, diff, &t_vblank, cur_vblank); |
Ville Syrjälä | 13b030a | 2014-08-06 14:49:47 +0300 | [diff] [blame] | 243 | } |
| 244 | |
Maarten Lankhorst | af61d5c | 2016-05-17 15:07:44 +0200 | [diff] [blame] | 245 | /** |
| 246 | * drm_accurate_vblank_count - retrieve the master vblank counter |
| 247 | * @crtc: which counter to retrieve |
| 248 | * |
| 249 | * This function is similar to @drm_crtc_vblank_count but this |
| 250 | * function interpolates to handle a race with vblank irq's. |
| 251 | * |
| 252 | * This is mostly useful for hardware that can obtain the scanout |
| 253 | * position, but doesn't have a frame counter. |
| 254 | */ |
| 255 | u32 drm_accurate_vblank_count(struct drm_crtc *crtc) |
| 256 | { |
| 257 | struct drm_device *dev = crtc->dev; |
| 258 | unsigned int pipe = drm_crtc_index(crtc); |
| 259 | u32 vblank; |
| 260 | unsigned long flags; |
| 261 | |
| 262 | WARN(!dev->driver->get_vblank_timestamp, |
| 263 | "This function requires support for accurate vblank timestamps."); |
| 264 | |
| 265 | spin_lock_irqsave(&dev->vblank_time_lock, flags); |
| 266 | |
| 267 | drm_update_vblank_count(dev, pipe, 0); |
| 268 | vblank = drm_vblank_count(dev, pipe); |
| 269 | |
| 270 | spin_unlock_irqrestore(&dev->vblank_time_lock, flags); |
| 271 | |
| 272 | return vblank; |
| 273 | } |
| 274 | EXPORT_SYMBOL(drm_accurate_vblank_count); |
| 275 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 276 | /* |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 277 | * Disable vblank irq's on crtc, make sure that last vblank count |
| 278 | * of hardware and corresponding consistent software vblank counter |
| 279 | * are preserved, even if there are any spurious vblank irq's after |
| 280 | * disable. |
| 281 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 282 | static void vblank_disable_and_save(struct drm_device *dev, unsigned int pipe) |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 283 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 284 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 285 | unsigned long irqflags; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 286 | |
| 287 | /* Prevent vblank irq processing while disabling vblank irqs, |
| 288 | * so no updates of timestamps or count can happen after we've |
| 289 | * disabled. Needed to prevent races in case of delayed irq's. |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 290 | */ |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 291 | spin_lock_irqsave(&dev->vblank_time_lock, irqflags); |
| 292 | |
Ville Syrjälä | 812e746 | 2014-08-06 14:49:48 +0300 | [diff] [blame] | 293 | /* |
Laurent Pinchart | eb2ed66 | 2015-01-29 01:09:24 +0200 | [diff] [blame] | 294 | * Only disable vblank interrupts if they're enabled. This avoids |
| 295 | * calling the ->disable_vblank() operation in atomic context with the |
| 296 | * hardware potentially runtime suspended. |
| 297 | */ |
| 298 | if (vblank->enabled) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 299 | dev->driver->disable_vblank(dev, pipe); |
Laurent Pinchart | eb2ed66 | 2015-01-29 01:09:24 +0200 | [diff] [blame] | 300 | vblank->enabled = false; |
| 301 | } |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 302 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 303 | /* |
| 304 | * Always update the count and timestamp to maintain the |
| 305 | * appearance that the counter has been ticking all along until |
| 306 | * this time. This makes the count account for the entire time |
| 307 | * between drm_vblank_on() and drm_vblank_off(). |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 308 | */ |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 309 | drm_update_vblank_count(dev, pipe, 0); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 310 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 311 | spin_unlock_irqrestore(&dev->vblank_time_lock, irqflags); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 312 | } |
| 313 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 314 | static void vblank_disable_fn(unsigned long arg) |
| 315 | { |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 316 | struct drm_vblank_crtc *vblank = (void *)arg; |
| 317 | struct drm_device *dev = vblank->dev; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 318 | unsigned int pipe = vblank->pipe; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 319 | unsigned long irqflags; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 320 | |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 321 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
| 322 | if (atomic_read(&vblank->refcount) == 0 && vblank->enabled) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 323 | DRM_DEBUG("disabling vblank on crtc %u\n", pipe); |
| 324 | vblank_disable_and_save(dev, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 325 | } |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 326 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 329 | /** |
| 330 | * drm_vblank_cleanup - cleanup vblank support |
| 331 | * @dev: DRM device |
| 332 | * |
| 333 | * This function cleans up any resources allocated in drm_vblank_init. |
| 334 | */ |
Keith Packard | 5244021 | 2008-11-18 09:30:25 -0800 | [diff] [blame] | 335 | void drm_vblank_cleanup(struct drm_device *dev) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 336 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 337 | unsigned int pipe; |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 338 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 339 | /* Bail if the driver didn't call drm_vblank_init() */ |
| 340 | if (dev->num_crtcs == 0) |
| 341 | return; |
| 342 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 343 | for (pipe = 0; pipe < dev->num_crtcs; pipe++) { |
| 344 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 345 | |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 346 | WARN_ON(vblank->enabled && |
| 347 | drm_core_check_feature(dev, DRIVER_MODESET)); |
Mario Kleiner | 2368ffb | 2014-08-06 03:22:46 +0200 | [diff] [blame] | 348 | |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 349 | del_timer_sync(&vblank->disable_timer); |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 350 | } |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 351 | |
Ville Syrjälä | 5380e92 | 2013-10-04 14:53:36 +0300 | [diff] [blame] | 352 | kfree(dev->vblank); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 353 | |
| 354 | dev->num_crtcs = 0; |
| 355 | } |
Jerome Glisse | e77cef9 | 2010-01-07 15:39:13 +0100 | [diff] [blame] | 356 | EXPORT_SYMBOL(drm_vblank_cleanup); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 357 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 358 | /** |
| 359 | * drm_vblank_init - initialize vblank support |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 360 | * @dev: DRM device |
| 361 | * @num_crtcs: number of CRTCs supported by @dev |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 362 | * |
| 363 | * This function initializes vblank support for @num_crtcs display pipelines. |
| 364 | * |
| 365 | * Returns: |
| 366 | * Zero on success or a negative error code on failure. |
| 367 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 368 | int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 369 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 370 | int ret = -ENOMEM; |
| 371 | unsigned int i; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 372 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 373 | spin_lock_init(&dev->vbl_lock); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 374 | spin_lock_init(&dev->vblank_time_lock); |
| 375 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 376 | dev->num_crtcs = num_crtcs; |
| 377 | |
Ville Syrjälä | 5380e92 | 2013-10-04 14:53:36 +0300 | [diff] [blame] | 378 | dev->vblank = kcalloc(num_crtcs, sizeof(*dev->vblank), GFP_KERNEL); |
| 379 | if (!dev->vblank) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 380 | goto err; |
| 381 | |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 382 | for (i = 0; i < num_crtcs; i++) { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 383 | struct drm_vblank_crtc *vblank = &dev->vblank[i]; |
| 384 | |
| 385 | vblank->dev = dev; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 386 | vblank->pipe = i; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 387 | init_waitqueue_head(&vblank->queue); |
| 388 | setup_timer(&vblank->disable_timer, vblank_disable_fn, |
| 389 | (unsigned long)vblank); |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 390 | seqlock_init(&vblank->seqlock); |
Ville Syrjälä | e69595c | 2014-02-19 19:36:08 +0200 | [diff] [blame] | 391 | } |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 392 | |
Mario Kleiner | 8f6fce0 | 2013-10-30 05:13:06 +0100 | [diff] [blame] | 393 | DRM_INFO("Supports vblank timestamp caching Rev 2 (21.10.2013).\n"); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 394 | |
| 395 | /* Driver specific high-precision vblank timestamping supported? */ |
| 396 | if (dev->driver->get_vblank_timestamp) |
| 397 | DRM_INFO("Driver supports precise vblank timestamp query.\n"); |
| 398 | else |
| 399 | DRM_INFO("No driver support for vblank timestamp query.\n"); |
| 400 | |
Mario Kleiner | 5a8b21b | 2015-05-04 06:29:45 +0200 | [diff] [blame] | 401 | /* Must have precise timestamping for reliable vblank instant disable */ |
| 402 | if (dev->vblank_disable_immediate && !dev->driver->get_vblank_timestamp) { |
| 403 | dev->vblank_disable_immediate = false; |
| 404 | DRM_INFO("Setting vblank_disable_immediate to false because " |
| 405 | "get_vblank_timestamp == NULL\n"); |
| 406 | } |
| 407 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 408 | return 0; |
| 409 | |
| 410 | err: |
Mario Kleiner | 79a093ae | 2014-08-06 03:22:44 +0200 | [diff] [blame] | 411 | dev->num_crtcs = 0; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 412 | return ret; |
| 413 | } |
| 414 | EXPORT_SYMBOL(drm_vblank_init); |
| 415 | |
Dave Airlie | 28d5204 | 2009-09-21 14:33:58 +1000 | [diff] [blame] | 416 | static void drm_irq_vgaarb_nokms(void *cookie, bool state) |
| 417 | { |
| 418 | struct drm_device *dev = cookie; |
| 419 | |
| 420 | if (dev->driver->vgaarb_irq) { |
| 421 | dev->driver->vgaarb_irq(dev, state); |
| 422 | return; |
| 423 | } |
| 424 | |
| 425 | if (!dev->irq_enabled) |
| 426 | return; |
| 427 | |
Joonyoung Shim | 5037f8a | 2011-08-04 05:41:01 +0000 | [diff] [blame] | 428 | if (state) { |
| 429 | if (dev->driver->irq_uninstall) |
| 430 | dev->driver->irq_uninstall(dev); |
| 431 | } else { |
| 432 | if (dev->driver->irq_preinstall) |
| 433 | dev->driver->irq_preinstall(dev); |
| 434 | if (dev->driver->irq_postinstall) |
| 435 | dev->driver->irq_postinstall(dev); |
Dave Airlie | 28d5204 | 2009-09-21 14:33:58 +1000 | [diff] [blame] | 436 | } |
| 437 | } |
| 438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | /** |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 440 | * drm_irq_install - install IRQ handler |
| 441 | * @dev: DRM device |
| 442 | * @irq: IRQ number to install the handler for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | * |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 444 | * Initializes the IRQ related data. Installs the handler, calling the driver |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 445 | * irq_preinstall() and irq_postinstall() functions before and after the |
| 446 | * installation. |
| 447 | * |
| 448 | * This is the simplified helper interface provided for drivers with no special |
| 449 | * needs. Drivers which need to install interrupt handlers for multiple |
| 450 | * interrupts must instead set drm_device->irq_enabled to signal the DRM core |
| 451 | * that vblank interrupts are available. |
| 452 | * |
| 453 | * Returns: |
| 454 | * Zero on success or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | */ |
Daniel Vetter | bb0f1b5 | 2013-11-03 21:09:27 +0100 | [diff] [blame] | 456 | int drm_irq_install(struct drm_device *dev, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | { |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 458 | int ret; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 459 | unsigned long sh_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
| 461 | if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) |
| 462 | return -EINVAL; |
| 463 | |
Daniel Vetter | 7c1a38e | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 464 | if (irq == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | return -EINVAL; |
| 466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | /* Driver must have been initialized */ |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 468 | if (!dev->dev_private) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 471 | if (dev->irq_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | return -EBUSY; |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 473 | dev->irq_enabled = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
Daniel Vetter | 7c1a38e | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 475 | DRM_DEBUG("irq=%d\n", irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 477 | /* Before installing handler */ |
Joonyoung Shim | 5037f8a | 2011-08-04 05:41:01 +0000 | [diff] [blame] | 478 | if (dev->driver->irq_preinstall) |
| 479 | dev->driver->irq_preinstall(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 481 | /* Install handler */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED)) |
Thomas Gleixner | 935f6e3 | 2006-07-01 19:29:34 -0700 | [diff] [blame] | 483 | sh_flags = IRQF_SHARED; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 484 | |
Daniel Vetter | 7c1a38e | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 485 | ret = request_irq(irq, dev->driver->irq_handler, |
Daniel Vetter | 5829d18 | 2013-11-03 21:48:48 +0100 | [diff] [blame] | 486 | sh_flags, dev->driver->name, dev); |
Jesse Barnes | 9bfbd5c | 2008-09-15 15:00:33 -0700 | [diff] [blame] | 487 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 488 | if (ret < 0) { |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 489 | dev->irq_enabled = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | return ret; |
| 491 | } |
| 492 | |
Dave Airlie | 28d5204 | 2009-09-21 14:33:58 +1000 | [diff] [blame] | 493 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| 494 | vga_client_register(dev->pdev, (void *)dev, drm_irq_vgaarb_nokms, NULL); |
| 495 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 496 | /* After installing handler */ |
Joonyoung Shim | 5037f8a | 2011-08-04 05:41:01 +0000 | [diff] [blame] | 497 | if (dev->driver->irq_postinstall) |
| 498 | ret = dev->driver->irq_postinstall(dev); |
| 499 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 500 | if (ret < 0) { |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 501 | dev->irq_enabled = false; |
Joonyoung Shim | e1c44ac | 2011-08-04 05:41:00 +0000 | [diff] [blame] | 502 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| 503 | vga_client_register(dev->pdev, NULL, NULL, NULL); |
Daniel Vetter | 7c1a38e | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 504 | free_irq(irq, dev); |
| 505 | } else { |
| 506 | dev->irq = irq; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 507 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 509 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 511 | EXPORT_SYMBOL(drm_irq_install); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
| 513 | /** |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 514 | * drm_irq_uninstall - uninstall the IRQ handler |
| 515 | * @dev: DRM device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 517 | * Calls the driver's irq_uninstall() function and unregisters the IRQ handler. |
| 518 | * This should only be called by drivers which used drm_irq_install() to set up |
| 519 | * their interrupt handler. Other drivers must only reset |
| 520 | * drm_device->irq_enabled to false. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 522 | * Note that for kernel modesetting drivers it is a bug if this function fails. |
| 523 | * The sanity checks are only to catch buggy user modesetting drivers which call |
| 524 | * the same function through an ioctl. |
| 525 | * |
| 526 | * Returns: |
| 527 | * Zero on success or a negative error code on failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | */ |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 529 | int drm_irq_uninstall(struct drm_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | { |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 531 | unsigned long irqflags; |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 532 | bool irq_enabled; |
| 533 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
| 535 | if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) |
| 536 | return -EINVAL; |
| 537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | irq_enabled = dev->irq_enabled; |
Ville Syrjälä | 4423843 | 2013-10-04 14:53:37 +0300 | [diff] [blame] | 539 | dev->irq_enabled = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 541 | /* |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 542 | * Wake up any waiters so they don't hang. This is just to paper over |
| 543 | * isssues for UMS drivers which aren't in full control of their |
| 544 | * vblank/irq handling. KMS drivers must ensure that vblanks are all |
| 545 | * disabled when uninstalling the irq handler. |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 546 | */ |
Ben Skeggs | bde4889 | 2011-07-04 12:52:27 +1000 | [diff] [blame] | 547 | if (dev->num_crtcs) { |
| 548 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
| 549 | for (i = 0; i < dev->num_crtcs; i++) { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 550 | struct drm_vblank_crtc *vblank = &dev->vblank[i]; |
| 551 | |
Daniel Vetter | 3bff93d | 2015-02-22 15:11:19 +0100 | [diff] [blame] | 552 | if (!vblank->enabled) |
| 553 | continue; |
| 554 | |
| 555 | WARN_ON(drm_core_check_feature(dev, DRIVER_MODESET)); |
| 556 | |
| 557 | vblank_disable_and_save(dev, i); |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 558 | wake_up(&vblank->queue); |
Ben Skeggs | bde4889 | 2011-07-04 12:52:27 +1000 | [diff] [blame] | 559 | } |
| 560 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 561 | } |
Jesse Barnes | dc1336f | 2009-01-06 10:21:24 -0800 | [diff] [blame] | 562 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 563 | if (!irq_enabled) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | return -EINVAL; |
| 565 | |
Daniel Vetter | 7c1a38e | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 566 | DRM_DEBUG("irq=%d\n", dev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Dave Airlie | 28d5204 | 2009-09-21 14:33:58 +1000 | [diff] [blame] | 568 | if (!drm_core_check_feature(dev, DRIVER_MODESET)) |
| 569 | vga_client_register(dev->pdev, NULL, NULL, NULL); |
| 570 | |
Joonyoung Shim | 5037f8a | 2011-08-04 05:41:01 +0000 | [diff] [blame] | 571 | if (dev->driver->irq_uninstall) |
| 572 | dev->driver->irq_uninstall(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
Daniel Vetter | 7c1a38e | 2013-12-16 11:21:15 +0100 | [diff] [blame] | 574 | free_irq(dev->irq, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
| 576 | return 0; |
| 577 | } |
| 578 | EXPORT_SYMBOL(drm_irq_uninstall); |
| 579 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 580 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | * IRQ control ioctl. |
| 582 | * |
| 583 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 584 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | * \param cmd command. |
| 586 | * \param arg user argument, pointing to a drm_control structure. |
| 587 | * \return zero on success or a negative number on failure. |
| 588 | * |
| 589 | * Calls irq_install() or irq_uninstall() according to \p arg. |
| 590 | */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 591 | int drm_control(struct drm_device *dev, void *data, |
| 592 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 594 | struct drm_control *ctl = data; |
Daniel Vetter | a319c1a | 2013-11-03 21:09:15 +0100 | [diff] [blame] | 595 | int ret = 0, irq; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 596 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 597 | /* if we haven't irq we fallback for compatibility reasons - |
| 598 | * this used to be a separate function in drm_dma.h |
| 599 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
Daniel Vetter | 22471cf | 2013-11-03 20:02:50 +0100 | [diff] [blame] | 601 | if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) |
| 602 | return 0; |
| 603 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
| 604 | return 0; |
| 605 | /* UMS was only ever support on pci devices. */ |
| 606 | if (WARN_ON(!dev->pdev)) |
| 607 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 609 | switch (ctl->func) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | case DRM_INST_HANDLER: |
Daniel Vetter | a319c1a | 2013-11-03 21:09:15 +0100 | [diff] [blame] | 611 | irq = dev->pdev->irq; |
| 612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | if (dev->if_version < DRM_IF_VERSION(1, 2) && |
Daniel Vetter | a319c1a | 2013-11-03 21:09:15 +0100 | [diff] [blame] | 614 | ctl->irq != irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | return -EINVAL; |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 616 | mutex_lock(&dev->struct_mutex); |
Daniel Vetter | bb0f1b5 | 2013-11-03 21:09:27 +0100 | [diff] [blame] | 617 | ret = drm_irq_install(dev, irq); |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 618 | mutex_unlock(&dev->struct_mutex); |
| 619 | |
| 620 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | case DRM_UNINST_HANDLER: |
Daniel Vetter | e090c53 | 2013-11-03 20:27:05 +0100 | [diff] [blame] | 622 | mutex_lock(&dev->struct_mutex); |
| 623 | ret = drm_irq_uninstall(dev); |
| 624 | mutex_unlock(&dev->struct_mutex); |
| 625 | |
| 626 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | default: |
| 628 | return -EINVAL; |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | /** |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 633 | * drm_calc_timestamping_constants - calculate vblank timestamp constants |
| 634 | * @crtc: drm_crtc whose timestamp constants should be updated. |
| 635 | * @mode: display mode containing the scanout timings |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 636 | * |
Ville Syrjälä | 21b2156 | 2013-10-26 17:22:52 +0300 | [diff] [blame] | 637 | * Calculate and store various constants which are later |
| 638 | * needed by vblank and swap-completion timestamping, e.g, |
| 639 | * by drm_calc_vbltimestamp_from_scanoutpos(). They are |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 640 | * derived from CRTC's true scanout timing, so they take |
Ville Syrjälä | 21b2156 | 2013-10-26 17:22:52 +0300 | [diff] [blame] | 641 | * things like panel scaling or other adjustments into account. |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 642 | */ |
Ville Syrjälä | 545cdd5 | 2013-10-26 17:16:30 +0300 | [diff] [blame] | 643 | void drm_calc_timestamping_constants(struct drm_crtc *crtc, |
| 644 | const struct drm_display_mode *mode) |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 645 | { |
Ville Syrjälä | 0c545ac | 2015-11-12 14:34:18 +0200 | [diff] [blame] | 646 | struct drm_device *dev = crtc->dev; |
| 647 | unsigned int pipe = drm_crtc_index(crtc); |
| 648 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 20b2020 | 2015-09-14 22:43:45 +0300 | [diff] [blame] | 649 | int linedur_ns = 0, framedur_ns = 0; |
Ville Syrjälä | 77666b7 | 2013-10-27 21:22:58 +0200 | [diff] [blame] | 650 | int dotclock = mode->crtc_clock; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 651 | |
Ville Syrjälä | 0c545ac | 2015-11-12 14:34:18 +0200 | [diff] [blame] | 652 | if (!dev->num_crtcs) |
| 653 | return; |
| 654 | |
| 655 | if (WARN_ON(pipe >= dev->num_crtcs)) |
| 656 | return; |
| 657 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 658 | /* Valid dotclock? */ |
| 659 | if (dotclock > 0) { |
Ville Syrjälä | 0dae35a | 2013-10-26 17:11:01 +0300 | [diff] [blame] | 660 | int frame_size = mode->crtc_htotal * mode->crtc_vtotal; |
| 661 | |
| 662 | /* |
| 663 | * Convert scanline length in pixels and video |
Ville Syrjälä | 20b2020 | 2015-09-14 22:43:45 +0300 | [diff] [blame] | 664 | * dot clock to line duration and frame duration |
| 665 | * in nanoseconds: |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 666 | */ |
Ville Syrjälä | 0dae35a | 2013-10-26 17:11:01 +0300 | [diff] [blame] | 667 | linedur_ns = div_u64((u64) mode->crtc_htotal * 1000000, dotclock); |
| 668 | framedur_ns = div_u64((u64) frame_size * 1000000, dotclock); |
Ville Syrjälä | c0ae24c | 2013-10-28 19:53:25 +0200 | [diff] [blame] | 669 | |
| 670 | /* |
| 671 | * Fields of interlaced scanout modes are only half a frame duration. |
| 672 | */ |
| 673 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
| 674 | framedur_ns /= 2; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 675 | } else |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 676 | DRM_ERROR("crtc %u: Can't calculate constants, dotclock = 0!\n", |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 677 | crtc->base.id); |
| 678 | |
Ville Syrjälä | eba1f35 | 2015-09-14 22:43:43 +0300 | [diff] [blame] | 679 | vblank->linedur_ns = linedur_ns; |
| 680 | vblank->framedur_ns = framedur_ns; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 681 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 682 | DRM_DEBUG("crtc %u: hwmode: htotal %d, vtotal %d, vdisplay %d\n", |
Ville Syrjälä | 545cdd5 | 2013-10-26 17:16:30 +0300 | [diff] [blame] | 683 | crtc->base.id, mode->crtc_htotal, |
| 684 | mode->crtc_vtotal, mode->crtc_vdisplay); |
Ville Syrjälä | 20b2020 | 2015-09-14 22:43:45 +0300 | [diff] [blame] | 685 | DRM_DEBUG("crtc %u: clock %d kHz framedur %d linedur %d\n", |
| 686 | crtc->base.id, dotclock, framedur_ns, linedur_ns); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 687 | } |
| 688 | EXPORT_SYMBOL(drm_calc_timestamping_constants); |
| 689 | |
| 690 | /** |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 691 | * drm_calc_vbltimestamp_from_scanoutpos - precise vblank timestamp helper |
| 692 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 693 | * @pipe: index of CRTC whose vblank timestamp to retrieve |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 694 | * @max_error: Desired maximum allowable error in timestamps (nanosecs) |
| 695 | * On return contains true maximum error of timestamp |
| 696 | * @vblank_time: Pointer to struct timeval which should receive the timestamp |
| 697 | * @flags: Flags to pass to driver: |
| 698 | * 0 = Default, |
| 699 | * DRM_CALLED_FROM_VBLIRQ = If function is called from vbl IRQ handler |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 700 | * @mode: mode which defines the scanout timings |
| 701 | * |
| 702 | * Implements calculation of exact vblank timestamps from given drm_display_mode |
| 703 | * timings and current video scanout position of a CRTC. This can be called from |
| 704 | * within get_vblank_timestamp() implementation of a kms driver to implement the |
| 705 | * actual timestamping. |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 706 | * |
| 707 | * Should return timestamps conforming to the OML_sync_control OpenML |
| 708 | * extension specification. The timestamp corresponds to the end of |
| 709 | * the vblank interval, aka start of scanout of topmost-leftmost display |
| 710 | * pixel in the following video frame. |
| 711 | * |
| 712 | * Requires support for optional dev->driver->get_scanout_position() |
| 713 | * in kms driver, plus a bit of setup code to provide a drm_display_mode |
| 714 | * that corresponds to the true scanout timing. |
| 715 | * |
| 716 | * The current implementation only handles standard video modes. It |
| 717 | * returns as no operation if a doublescan or interlaced video mode is |
| 718 | * active. Higher level code is expected to handle this. |
| 719 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 720 | * Returns: |
| 721 | * Negative value on error, failure or if not supported in current |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 722 | * video mode: |
| 723 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 724 | * -EINVAL - Invalid CRTC. |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 725 | * -EAGAIN - Temporary unavailable, e.g., called before initial modeset. |
| 726 | * -ENOTSUPP - Function not supported in current display mode. |
| 727 | * -EIO - Failed, e.g., due to failed scanout position query. |
| 728 | * |
| 729 | * Returns or'ed positive status flags on success: |
| 730 | * |
| 731 | * DRM_VBLANKTIME_SCANOUTPOS_METHOD - Signal this method used for timestamping. |
| 732 | * DRM_VBLANKTIME_INVBL - Timestamp taken while scanout was in vblank interval. |
| 733 | * |
| 734 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 735 | int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, |
| 736 | unsigned int pipe, |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 737 | int *max_error, |
| 738 | struct timeval *vblank_time, |
| 739 | unsigned flags, |
Ville Syrjälä | 7da903e | 2013-10-26 17:57:31 +0300 | [diff] [blame] | 740 | const struct drm_display_mode *mode) |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 741 | { |
Imre Deak | e62f2f5 | 2012-10-23 18:53:25 +0000 | [diff] [blame] | 742 | struct timeval tv_etime; |
Thomas Gleixner | d2cb58c | 2014-07-16 21:04:26 +0000 | [diff] [blame] | 743 | ktime_t stime, etime; |
Ville Syrjälä | ad1716e | 2015-09-14 22:43:49 +0300 | [diff] [blame] | 744 | unsigned int vbl_status; |
| 745 | int ret = DRM_VBLANKTIME_SCANOUTPOS_METHOD; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 746 | int vpos, hpos, i; |
Ville Syrjälä | 3bb403b | 2015-09-14 22:43:44 +0300 | [diff] [blame] | 747 | int delta_ns, duration_ns; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 748 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 749 | if (pipe >= dev->num_crtcs) { |
| 750 | DRM_ERROR("Invalid crtc %u\n", pipe); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 751 | return -EINVAL; |
| 752 | } |
| 753 | |
| 754 | /* Scanout position query not supported? Should not happen. */ |
| 755 | if (!dev->driver->get_scanout_position) { |
| 756 | DRM_ERROR("Called from driver w/o get_scanout_position()!?\n"); |
| 757 | return -EIO; |
| 758 | } |
| 759 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 760 | /* If mode timing undefined, just return as no-op: |
| 761 | * Happens during initial modesetting of a crtc. |
| 762 | */ |
Ville Syrjälä | 3bb403b | 2015-09-14 22:43:44 +0300 | [diff] [blame] | 763 | if (mode->crtc_clock == 0) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 764 | DRM_DEBUG("crtc %u: Noop due to uninitialized mode.\n", pipe); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 765 | return -EAGAIN; |
| 766 | } |
| 767 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 768 | /* Get current scanout position with system timestamp. |
| 769 | * Repeat query up to DRM_TIMESTAMP_MAXRETRIES times |
| 770 | * if single query takes longer than max_error nanoseconds. |
| 771 | * |
| 772 | * This guarantees a tight bound on maximum error if |
| 773 | * code gets preempted or delayed for some reason. |
| 774 | */ |
| 775 | for (i = 0; i < DRM_TIMESTAMP_MAXRETRIES; i++) { |
Mario Kleiner | 8f6fce0 | 2013-10-30 05:13:06 +0100 | [diff] [blame] | 776 | /* |
| 777 | * Get vertical and horizontal scanout position vpos, hpos, |
| 778 | * and bounding timestamps stime, etime, pre/post query. |
| 779 | */ |
Ville Syrjälä | 3bb403b | 2015-09-14 22:43:44 +0300 | [diff] [blame] | 780 | vbl_status = dev->driver->get_scanout_position(dev, pipe, flags, |
| 781 | &vpos, &hpos, |
| 782 | &stime, &etime, |
| 783 | mode); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 784 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 785 | /* Return as no-op if scanout query unsupported or failed. */ |
| 786 | if (!(vbl_status & DRM_SCANOUTPOS_VALID)) { |
Ville Syrjälä | ad1716e | 2015-09-14 22:43:49 +0300 | [diff] [blame] | 787 | DRM_DEBUG("crtc %u : scanoutpos query failed [0x%x].\n", |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 788 | pipe, vbl_status); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 789 | return -EIO; |
| 790 | } |
| 791 | |
Mario Kleiner | 8f6fce0 | 2013-10-30 05:13:06 +0100 | [diff] [blame] | 792 | /* Compute uncertainty in timestamp of scanout position query. */ |
Imre Deak | e62f2f5 | 2012-10-23 18:53:25 +0000 | [diff] [blame] | 793 | duration_ns = ktime_to_ns(etime) - ktime_to_ns(stime); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 794 | |
| 795 | /* Accept result with < max_error nsecs timing uncertainty. */ |
Ville Syrjälä | 3c184f6 | 2013-10-26 17:38:52 +0300 | [diff] [blame] | 796 | if (duration_ns <= *max_error) |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 797 | break; |
| 798 | } |
| 799 | |
| 800 | /* Noisy system timing? */ |
| 801 | if (i == DRM_TIMESTAMP_MAXRETRIES) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 802 | DRM_DEBUG("crtc %u: Noisy timestamp %d us > %d us [%d reps].\n", |
| 803 | pipe, duration_ns/1000, *max_error/1000, i); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 804 | } |
| 805 | |
| 806 | /* Return upper bound of timestamp precision error. */ |
Ville Syrjälä | 3c184f6 | 2013-10-26 17:38:52 +0300 | [diff] [blame] | 807 | *max_error = duration_ns; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 808 | |
| 809 | /* Check if in vblank area: |
| 810 | * vpos is >=0 in video scanout area, but negative |
| 811 | * within vblank area, counting down the number of lines until |
| 812 | * start of scanout. |
| 813 | */ |
Ville Syrjälä | ad1716e | 2015-09-14 22:43:49 +0300 | [diff] [blame] | 814 | if (vbl_status & DRM_SCANOUTPOS_IN_VBLANK) |
| 815 | ret |= DRM_VBLANKTIME_IN_VBLANK; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 816 | |
| 817 | /* Convert scanout position into elapsed time at raw_time query |
| 818 | * since start of scanout at first display scanline. delta_ns |
| 819 | * can be negative if start of scanout hasn't happened yet. |
| 820 | */ |
Ville Syrjälä | 3bb403b | 2015-09-14 22:43:44 +0300 | [diff] [blame] | 821 | delta_ns = div_s64(1000000LL * (vpos * mode->crtc_htotal + hpos), |
| 822 | mode->crtc_clock); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 823 | |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 824 | if (!drm_timestamp_monotonic) |
Thomas Gleixner | d2cb58c | 2014-07-16 21:04:26 +0000 | [diff] [blame] | 825 | etime = ktime_mono_to_real(etime); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 826 | |
Imre Deak | e62f2f5 | 2012-10-23 18:53:25 +0000 | [diff] [blame] | 827 | /* save this only for debugging purposes */ |
| 828 | tv_etime = ktime_to_timeval(etime); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 829 | /* Subtract time delta from raw timestamp to get final |
| 830 | * vblank_time timestamp for end of vblank. |
| 831 | */ |
Daniel Vetter | a91d7b9 | 2016-03-29 13:12:22 +0200 | [diff] [blame] | 832 | etime = ktime_sub_ns(etime, delta_ns); |
Imre Deak | e62f2f5 | 2012-10-23 18:53:25 +0000 | [diff] [blame] | 833 | *vblank_time = ktime_to_timeval(etime); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 834 | |
Ville Syrjälä | 235fabe | 2015-10-09 22:57:37 +0300 | [diff] [blame] | 835 | DRM_DEBUG_VBL("crtc %u : v 0x%x p(%d,%d)@ %ld.%ld -> %ld.%ld [e %d us, %d rep]\n", |
| 836 | pipe, vbl_status, hpos, vpos, |
| 837 | (long)tv_etime.tv_sec, (long)tv_etime.tv_usec, |
| 838 | (long)vblank_time->tv_sec, (long)vblank_time->tv_usec, |
| 839 | duration_ns/1000, i); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 840 | |
Ville Syrjälä | ad1716e | 2015-09-14 22:43:49 +0300 | [diff] [blame] | 841 | return ret; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 842 | } |
| 843 | EXPORT_SYMBOL(drm_calc_vbltimestamp_from_scanoutpos); |
| 844 | |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 845 | static struct timeval get_drm_timestamp(void) |
| 846 | { |
| 847 | ktime_t now; |
| 848 | |
Thomas Gleixner | d2cb58c | 2014-07-16 21:04:26 +0000 | [diff] [blame] | 849 | now = drm_timestamp_monotonic ? ktime_get() : ktime_get_real(); |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 850 | return ktime_to_timeval(now); |
| 851 | } |
| 852 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 853 | /** |
| 854 | * drm_get_last_vbltimestamp - retrieve raw timestamp for the most recent |
Thierry Reding | 4dfd909 | 2014-12-10 13:03:34 +0100 | [diff] [blame] | 855 | * vblank interval |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 856 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 857 | * @pipe: index of CRTC whose vblank timestamp to retrieve |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 858 | * @tvblank: Pointer to target struct timeval which should receive the timestamp |
| 859 | * @flags: Flags to pass to driver: |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 860 | * 0 = Default, |
| 861 | * DRM_CALLED_FROM_VBLIRQ = If function is called from vbl IRQ handler |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 862 | * |
| 863 | * Fetches the system timestamp corresponding to the time of the most recent |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 864 | * vblank interval on specified CRTC. May call into kms-driver to |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 865 | * compute the timestamp with a high-precision GPU specific method. |
| 866 | * |
| 867 | * Returns zero if timestamp originates from uncorrected do_gettimeofday() |
| 868 | * call, i.e., it isn't very precisely locked to the true vblank. |
| 869 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 870 | * Returns: |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 871 | * True if timestamp is considered to be very precise, false otherwise. |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 872 | */ |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 873 | static bool |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 874 | drm_get_last_vbltimestamp(struct drm_device *dev, unsigned int pipe, |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 875 | struct timeval *tvblank, unsigned flags) |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 876 | { |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 877 | int ret; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 878 | |
| 879 | /* Define requested maximum error on timestamps (nanoseconds). */ |
| 880 | int max_error = (int) drm_timestamp_precision * 1000; |
| 881 | |
| 882 | /* Query driver if possible and precision timestamping enabled. */ |
| 883 | if (dev->driver->get_vblank_timestamp && (max_error > 0)) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 884 | ret = dev->driver->get_vblank_timestamp(dev, pipe, &max_error, |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 885 | tvblank, flags); |
| 886 | if (ret > 0) |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 887 | return true; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 888 | } |
| 889 | |
| 890 | /* GPU high precision timestamp query unsupported or failed. |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 891 | * Return current monotonic/gettimeofday timestamp as best estimate. |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 892 | */ |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 893 | *tvblank = get_drm_timestamp(); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 894 | |
Daniel Vetter | fb446a1 | 2014-09-10 17:36:10 +0200 | [diff] [blame] | 895 | return false; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 896 | } |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 897 | |
| 898 | /** |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 899 | * drm_vblank_count - retrieve "cooked" vblank counter value |
| 900 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 901 | * @pipe: index of CRTC for which to retrieve the counter |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 902 | * |
| 903 | * Fetches the "cooked" vblank count value that represents the number of |
| 904 | * vblank events since the system was booted, including lost events due to |
| 905 | * modesetting activity. |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 906 | * |
Thierry Reding | 96d3f91 | 2014-12-16 13:08:47 +0100 | [diff] [blame] | 907 | * This is the legacy version of drm_crtc_vblank_count(). |
| 908 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 909 | * Returns: |
| 910 | * The software vblank counter. |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 911 | */ |
Thierry Reding | 88e7271 | 2015-09-24 18:35:31 +0200 | [diff] [blame] | 912 | u32 drm_vblank_count(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 913 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 914 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 915 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 916 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 917 | return 0; |
Thierry Reding | 7d1de85 | 2015-08-12 17:00:30 +0200 | [diff] [blame] | 918 | |
Daniel Vetter | 99264a6 | 2015-04-15 19:34:43 +0200 | [diff] [blame] | 919 | return vblank->count; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 920 | } |
| 921 | EXPORT_SYMBOL(drm_vblank_count); |
| 922 | |
| 923 | /** |
Thierry Reding | 96d3f91 | 2014-12-16 13:08:47 +0100 | [diff] [blame] | 924 | * drm_crtc_vblank_count - retrieve "cooked" vblank counter value |
| 925 | * @crtc: which counter to retrieve |
| 926 | * |
| 927 | * Fetches the "cooked" vblank count value that represents the number of |
| 928 | * vblank events since the system was booted, including lost events due to |
| 929 | * modesetting activity. |
| 930 | * |
| 931 | * This is the native KMS version of drm_vblank_count(). |
| 932 | * |
| 933 | * Returns: |
| 934 | * The software vblank counter. |
| 935 | */ |
| 936 | u32 drm_crtc_vblank_count(struct drm_crtc *crtc) |
| 937 | { |
| 938 | return drm_vblank_count(crtc->dev, drm_crtc_index(crtc)); |
| 939 | } |
| 940 | EXPORT_SYMBOL(drm_crtc_vblank_count); |
| 941 | |
| 942 | /** |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 943 | * drm_vblank_count_and_time - retrieve "cooked" vblank counter value and the |
| 944 | * system timestamp corresponding to that vblank counter value. |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 945 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 946 | * @pipe: index of CRTC whose counter to retrieve |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 947 | * @vblanktime: Pointer to struct timeval to receive the vblank timestamp. |
| 948 | * |
| 949 | * Fetches the "cooked" vblank count value that represents the number of |
| 950 | * vblank events since the system was booted, including lost events due to |
| 951 | * modesetting activity. Returns corresponding system timestamp of the time |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 952 | * of the vblank interval that corresponds to the current vblank counter value. |
Thierry Reding | cf64830 | 2015-09-24 18:35:36 +0200 | [diff] [blame] | 953 | * |
| 954 | * This is the legacy version of drm_crtc_vblank_count_and_time(). |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 955 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 956 | u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe, |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 957 | struct timeval *vblanktime) |
| 958 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 959 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 960 | u32 vblank_count; |
| 961 | unsigned int seq; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 962 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 963 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 964 | return 0; |
| 965 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 966 | do { |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 967 | seq = read_seqbegin(&vblank->seqlock); |
| 968 | vblank_count = vblank->count; |
| 969 | *vblanktime = vblank->time; |
| 970 | } while (read_seqretry(&vblank->seqlock, seq)); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 971 | |
Matthew Auld | d4055a9 | 2016-05-10 15:21:28 +0100 | [diff] [blame] | 972 | return vblank_count; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 973 | } |
| 974 | EXPORT_SYMBOL(drm_vblank_count_and_time); |
| 975 | |
Thierry Reding | cf64830 | 2015-09-24 18:35:36 +0200 | [diff] [blame] | 976 | /** |
| 977 | * drm_crtc_vblank_count_and_time - retrieve "cooked" vblank counter value |
| 978 | * and the system timestamp corresponding to that vblank counter value |
| 979 | * @crtc: which counter to retrieve |
| 980 | * @vblanktime: Pointer to struct timeval to receive the vblank timestamp. |
| 981 | * |
| 982 | * Fetches the "cooked" vblank count value that represents the number of |
| 983 | * vblank events since the system was booted, including lost events due to |
| 984 | * modesetting activity. Returns corresponding system timestamp of the time |
| 985 | * of the vblank interval that corresponds to the current vblank counter value. |
| 986 | * |
| 987 | * This is the native KMS version of drm_vblank_count_and_time(). |
| 988 | */ |
| 989 | u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc, |
| 990 | struct timeval *vblanktime) |
| 991 | { |
| 992 | return drm_vblank_count_and_time(crtc->dev, drm_crtc_index(crtc), |
| 993 | vblanktime); |
| 994 | } |
| 995 | EXPORT_SYMBOL(drm_crtc_vblank_count_and_time); |
| 996 | |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 997 | static void send_vblank_event(struct drm_device *dev, |
| 998 | struct drm_pending_vblank_event *e, |
| 999 | unsigned long seq, struct timeval *now) |
| 1000 | { |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1001 | e->event.sequence = seq; |
| 1002 | e->event.tv_sec = now->tv_sec; |
| 1003 | e->event.tv_usec = now->tv_usec; |
| 1004 | |
Daniel Vetter | fb740cf | 2016-01-11 22:40:59 +0100 | [diff] [blame] | 1005 | drm_send_event_locked(dev, &e->base); |
| 1006 | |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1007 | trace_drm_vblank_event_delivered(e->base.pid, e->pipe, |
| 1008 | e->event.sequence); |
| 1009 | } |
| 1010 | |
| 1011 | /** |
Daniel Vetter | bbc8764 | 2015-11-10 17:37:31 +0100 | [diff] [blame] | 1012 | * drm_arm_vblank_event - arm vblank event after pageflip |
| 1013 | * @dev: DRM device |
| 1014 | * @pipe: CRTC index |
| 1015 | * @e: the event to prepare to send |
| 1016 | * |
| 1017 | * A lot of drivers need to generate vblank events for the very next vblank |
| 1018 | * interrupt. For example when the page flip interrupt happens when the page |
| 1019 | * flip gets armed, but not when it actually executes within the next vblank |
| 1020 | * period. This helper function implements exactly the required vblank arming |
| 1021 | * behaviour. |
| 1022 | * |
| 1023 | * Caller must hold event lock. Caller must also hold a vblank reference for |
| 1024 | * the event @e, which will be dropped when the next vblank arrives. |
| 1025 | * |
| 1026 | * This is the legacy version of drm_crtc_arm_vblank_event(). |
| 1027 | */ |
| 1028 | void drm_arm_vblank_event(struct drm_device *dev, unsigned int pipe, |
| 1029 | struct drm_pending_vblank_event *e) |
| 1030 | { |
| 1031 | assert_spin_locked(&dev->event_lock); |
| 1032 | |
| 1033 | e->pipe = pipe; |
| 1034 | e->event.sequence = drm_vblank_count(dev, pipe); |
| 1035 | list_add_tail(&e->base.link, &dev->vblank_event_list); |
| 1036 | } |
| 1037 | EXPORT_SYMBOL(drm_arm_vblank_event); |
| 1038 | |
| 1039 | /** |
| 1040 | * drm_crtc_arm_vblank_event - arm vblank event after pageflip |
| 1041 | * @crtc: the source CRTC of the vblank event |
| 1042 | * @e: the event to send |
| 1043 | * |
| 1044 | * A lot of drivers need to generate vblank events for the very next vblank |
| 1045 | * interrupt. For example when the page flip interrupt happens when the page |
| 1046 | * flip gets armed, but not when it actually executes within the next vblank |
| 1047 | * period. This helper function implements exactly the required vblank arming |
| 1048 | * behaviour. |
| 1049 | * |
| 1050 | * Caller must hold event lock. Caller must also hold a vblank reference for |
| 1051 | * the event @e, which will be dropped when the next vblank arrives. |
| 1052 | * |
| 1053 | * This is the native KMS version of drm_arm_vblank_event(). |
| 1054 | */ |
| 1055 | void drm_crtc_arm_vblank_event(struct drm_crtc *crtc, |
| 1056 | struct drm_pending_vblank_event *e) |
| 1057 | { |
| 1058 | drm_arm_vblank_event(crtc->dev, drm_crtc_index(crtc), e); |
| 1059 | } |
| 1060 | EXPORT_SYMBOL(drm_crtc_arm_vblank_event); |
| 1061 | |
| 1062 | /** |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1063 | * drm_send_vblank_event - helper to send vblank event after pageflip |
| 1064 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1065 | * @pipe: CRTC index |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1066 | * @e: the event to send |
| 1067 | * |
| 1068 | * Updates sequence # and timestamp on event, and sends it to userspace. |
| 1069 | * Caller must hold event lock. |
Thierry Reding | a4d7b30 | 2014-12-15 14:47:18 +0100 | [diff] [blame] | 1070 | * |
| 1071 | * This is the legacy version of drm_crtc_send_vblank_event(). |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1072 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1073 | void drm_send_vblank_event(struct drm_device *dev, unsigned int pipe, |
| 1074 | struct drm_pending_vblank_event *e) |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1075 | { |
| 1076 | struct timeval now; |
| 1077 | unsigned int seq; |
Thierry Reding | 4dfd909 | 2014-12-10 13:03:34 +0100 | [diff] [blame] | 1078 | |
Thierry Reding | 2a7d3d6 | 2015-08-12 17:00:24 +0200 | [diff] [blame] | 1079 | if (dev->num_crtcs > 0) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1080 | seq = drm_vblank_count_and_time(dev, pipe, &now); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1081 | } else { |
| 1082 | seq = 0; |
Imre Deak | c61eef7 | 2012-10-23 18:53:26 +0000 | [diff] [blame] | 1083 | |
| 1084 | now = get_drm_timestamp(); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1085 | } |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1086 | e->pipe = pipe; |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1087 | send_vblank_event(dev, e, seq, &now); |
| 1088 | } |
| 1089 | EXPORT_SYMBOL(drm_send_vblank_event); |
| 1090 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1091 | /** |
Thierry Reding | a4d7b30 | 2014-12-15 14:47:18 +0100 | [diff] [blame] | 1092 | * drm_crtc_send_vblank_event - helper to send vblank event after pageflip |
| 1093 | * @crtc: the source CRTC of the vblank event |
| 1094 | * @e: the event to send |
| 1095 | * |
| 1096 | * Updates sequence # and timestamp on event, and sends it to userspace. |
| 1097 | * Caller must hold event lock. |
| 1098 | * |
| 1099 | * This is the native KMS version of drm_send_vblank_event(). |
| 1100 | */ |
| 1101 | void drm_crtc_send_vblank_event(struct drm_crtc *crtc, |
| 1102 | struct drm_pending_vblank_event *e) |
| 1103 | { |
| 1104 | drm_send_vblank_event(crtc->dev, drm_crtc_index(crtc), e); |
| 1105 | } |
| 1106 | EXPORT_SYMBOL(drm_crtc_send_vblank_event); |
| 1107 | |
| 1108 | /** |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1109 | * drm_vblank_enable - enable the vblank interrupt on a CRTC |
| 1110 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1111 | * @pipe: CRTC index |
Thierry Reding | c30e11f | 2015-08-12 17:00:33 +0200 | [diff] [blame] | 1112 | * |
| 1113 | * Returns: |
| 1114 | * Zero on success or a negative error code on failure. |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1115 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1116 | static int drm_vblank_enable(struct drm_device *dev, unsigned int pipe) |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1117 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1118 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1119 | int ret = 0; |
| 1120 | |
| 1121 | assert_spin_locked(&dev->vbl_lock); |
| 1122 | |
| 1123 | spin_lock(&dev->vblank_time_lock); |
| 1124 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1125 | if (!vblank->enabled) { |
Daniel Vetter | 1cfb80b | 2014-05-21 15:11:33 +0200 | [diff] [blame] | 1126 | /* |
| 1127 | * Enable vblank irqs under vblank_time_lock protection. |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1128 | * All vblank count & timestamp updates are held off |
| 1129 | * until we are done reinitializing master counter and |
| 1130 | * timestamps. Filtercode in drm_handle_vblank() will |
| 1131 | * prevent double-accounting of same vblank interval. |
| 1132 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1133 | ret = dev->driver->enable_vblank(dev, pipe); |
| 1134 | DRM_DEBUG("enabling vblank on crtc %u, ret: %d\n", pipe, ret); |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1135 | if (ret) |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1136 | atomic_dec(&vblank->refcount); |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1137 | else { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1138 | vblank->enabled = true; |
Ville Syrjälä | a6e610d | 2015-09-14 22:43:47 +0300 | [diff] [blame] | 1139 | drm_update_vblank_count(dev, pipe, 0); |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1140 | } |
| 1141 | } |
| 1142 | |
| 1143 | spin_unlock(&dev->vblank_time_lock); |
| 1144 | |
| 1145 | return ret; |
| 1146 | } |
| 1147 | |
| 1148 | /** |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1149 | * drm_vblank_get - get a reference count on vblank events |
| 1150 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1151 | * @pipe: index of CRTC to own |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1152 | * |
| 1153 | * Acquire a reference count on vblank events to avoid having them disabled |
| 1154 | * while in use. |
| 1155 | * |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1156 | * This is the legacy version of drm_crtc_vblank_get(). |
| 1157 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1158 | * Returns: |
Thierry Reding | c30e11f | 2015-08-12 17:00:33 +0200 | [diff] [blame] | 1159 | * Zero on success or a negative error code on failure. |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1160 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1161 | int drm_vblank_get(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1162 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1163 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Peter Hurley | 97cbc88 | 2013-08-20 21:51:12 -0400 | [diff] [blame] | 1164 | unsigned long irqflags; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1165 | int ret = 0; |
| 1166 | |
Gerd Hoffmann | 16e3247 | 2015-03-30 12:50:50 +0200 | [diff] [blame] | 1167 | if (!dev->num_crtcs) |
| 1168 | return -EINVAL; |
| 1169 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1170 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1171 | return -EINVAL; |
| 1172 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1173 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
| 1174 | /* Going from 0->1 means we have to enable interrupts again */ |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1175 | if (atomic_add_return(1, &vblank->refcount) == 1) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1176 | ret = drm_vblank_enable(dev, pipe); |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1177 | } else { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1178 | if (!vblank->enabled) { |
| 1179 | atomic_dec(&vblank->refcount); |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1180 | ret = -EINVAL; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1181 | } |
| 1182 | } |
| 1183 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
| 1184 | |
| 1185 | return ret; |
| 1186 | } |
| 1187 | EXPORT_SYMBOL(drm_vblank_get); |
| 1188 | |
| 1189 | /** |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1190 | * drm_crtc_vblank_get - get a reference count on vblank events |
| 1191 | * @crtc: which CRTC to own |
| 1192 | * |
| 1193 | * Acquire a reference count on vblank events to avoid having them disabled |
| 1194 | * while in use. |
| 1195 | * |
Damien Lespiau | 30b79f0 | 2015-02-13 15:53:31 +0000 | [diff] [blame] | 1196 | * This is the native kms version of drm_vblank_get(). |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1197 | * |
| 1198 | * Returns: |
Thierry Reding | c30e11f | 2015-08-12 17:00:33 +0200 | [diff] [blame] | 1199 | * Zero on success or a negative error code on failure. |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1200 | */ |
| 1201 | int drm_crtc_vblank_get(struct drm_crtc *crtc) |
| 1202 | { |
| 1203 | return drm_vblank_get(crtc->dev, drm_crtc_index(crtc)); |
| 1204 | } |
| 1205 | EXPORT_SYMBOL(drm_crtc_vblank_get); |
| 1206 | |
| 1207 | /** |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1208 | * drm_vblank_put - release ownership of vblank events |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1209 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1210 | * @pipe: index of CRTC to release |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1211 | * |
| 1212 | * Release ownership of a given vblank counter, turning off interrupts |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1213 | * if possible. Disable interrupts after drm_vblank_offdelay milliseconds. |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1214 | * |
| 1215 | * This is the legacy version of drm_crtc_vblank_put(). |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1216 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1217 | void drm_vblank_put(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1218 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1219 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1220 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1221 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | 7f907bf | 2014-11-08 10:16:19 -0500 | [diff] [blame] | 1222 | return; |
Chris Wilson | b3f5e73 | 2009-02-19 14:48:22 +0000 | [diff] [blame] | 1223 | |
Thierry Reding | 7d1de85 | 2015-08-12 17:00:30 +0200 | [diff] [blame] | 1224 | if (WARN_ON(atomic_read(&vblank->refcount) == 0)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1225 | return; |
| 1226 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1227 | /* Last user schedules interrupt disable */ |
Ville Syrjälä | 4ed0ce3 | 2014-08-06 14:49:53 +0300 | [diff] [blame] | 1228 | if (atomic_dec_and_test(&vblank->refcount)) { |
Daniel Vetter | ab8905f | 2014-09-10 17:36:08 +0200 | [diff] [blame] | 1229 | if (drm_vblank_offdelay == 0) |
| 1230 | return; |
| 1231 | else if (dev->vblank_disable_immediate || drm_vblank_offdelay < 0) |
Ville Syrjälä | 4ed0ce3 | 2014-08-06 14:49:53 +0300 | [diff] [blame] | 1232 | vblank_disable_fn((unsigned long)vblank); |
Daniel Vetter | ab8905f | 2014-09-10 17:36:08 +0200 | [diff] [blame] | 1233 | else |
Ville Syrjälä | 4ed0ce3 | 2014-08-06 14:49:53 +0300 | [diff] [blame] | 1234 | mod_timer(&vblank->disable_timer, |
| 1235 | jiffies + ((drm_vblank_offdelay * HZ)/1000)); |
| 1236 | } |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1237 | } |
| 1238 | EXPORT_SYMBOL(drm_vblank_put); |
| 1239 | |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1240 | /** |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1241 | * drm_crtc_vblank_put - give up ownership of vblank events |
| 1242 | * @crtc: which counter to give up |
| 1243 | * |
| 1244 | * Release ownership of a given vblank counter, turning off interrupts |
| 1245 | * if possible. Disable interrupts after drm_vblank_offdelay milliseconds. |
| 1246 | * |
| 1247 | * This is the native kms version of drm_vblank_put(). |
| 1248 | */ |
| 1249 | void drm_crtc_vblank_put(struct drm_crtc *crtc) |
| 1250 | { |
| 1251 | drm_vblank_put(crtc->dev, drm_crtc_index(crtc)); |
| 1252 | } |
| 1253 | EXPORT_SYMBOL(drm_crtc_vblank_put); |
| 1254 | |
| 1255 | /** |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1256 | * drm_wait_one_vblank - wait for one vblank |
| 1257 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1258 | * @pipe: CRTC index |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1259 | * |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 1260 | * This waits for one vblank to pass on @pipe, using the irq driver interfaces. |
| 1261 | * It is a failure to call this when the vblank irq for @pipe is disabled, e.g. |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1262 | * due to lack of driver support or because the crtc is off. |
| 1263 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1264 | void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe) |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1265 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1266 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1267 | int ret; |
| 1268 | u32 last; |
| 1269 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1270 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Thierry Reding | 7d1de85 | 2015-08-12 17:00:30 +0200 | [diff] [blame] | 1271 | return; |
| 1272 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1273 | ret = drm_vblank_get(dev, pipe); |
| 1274 | if (WARN(ret, "vblank not available on crtc %i, ret=%i\n", pipe, ret)) |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1275 | return; |
| 1276 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1277 | last = drm_vblank_count(dev, pipe); |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1278 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1279 | ret = wait_event_timeout(vblank->queue, |
| 1280 | last != drm_vblank_count(dev, pipe), |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1281 | msecs_to_jiffies(100)); |
| 1282 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1283 | WARN(ret == 0, "vblank wait timed out on crtc %i\n", pipe); |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1284 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1285 | drm_vblank_put(dev, pipe); |
Daniel Vetter | e8450f5 | 2014-07-25 23:34:03 +0200 | [diff] [blame] | 1286 | } |
| 1287 | EXPORT_SYMBOL(drm_wait_one_vblank); |
| 1288 | |
| 1289 | /** |
| 1290 | * drm_crtc_wait_one_vblank - wait for one vblank |
| 1291 | * @crtc: DRM crtc |
| 1292 | * |
| 1293 | * This waits for one vblank to pass on @crtc, using the irq driver interfaces. |
| 1294 | * It is a failure to call this when the vblank irq for @crtc is disabled, e.g. |
| 1295 | * due to lack of driver support or because the crtc is off. |
| 1296 | */ |
| 1297 | void drm_crtc_wait_one_vblank(struct drm_crtc *crtc) |
| 1298 | { |
| 1299 | drm_wait_one_vblank(crtc->dev, drm_crtc_index(crtc)); |
| 1300 | } |
| 1301 | EXPORT_SYMBOL(drm_crtc_wait_one_vblank); |
| 1302 | |
| 1303 | /** |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1304 | * drm_vblank_off - disable vblank events on a CRTC |
| 1305 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1306 | * @pipe: CRTC index |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1307 | * |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1308 | * Drivers can use this function to shut down the vblank interrupt handling when |
| 1309 | * disabling a crtc. This function ensures that the latest vblank frame count is |
| 1310 | * stored so that drm_vblank_on() can restore it again. |
| 1311 | * |
| 1312 | * Drivers must use this function when the hardware vblank counter can get |
| 1313 | * reset, e.g. when suspending. |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1314 | * |
| 1315 | * This is the legacy version of drm_crtc_vblank_off(). |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1316 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1317 | void drm_vblank_off(struct drm_device *dev, unsigned int pipe) |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1318 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1319 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1320 | struct drm_pending_vblank_event *e, *t; |
| 1321 | struct timeval now; |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1322 | unsigned long irqflags; |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1323 | unsigned int seq; |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1324 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1325 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1326 | return; |
| 1327 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1328 | spin_lock_irqsave(&dev->event_lock, irqflags); |
| 1329 | |
| 1330 | spin_lock(&dev->vbl_lock); |
Mario Kleiner | e823589 | 2016-02-12 20:30:27 +0100 | [diff] [blame] | 1331 | DRM_DEBUG_VBL("crtc %d, vblank enabled %d, inmodeset %d\n", |
| 1332 | pipe, vblank->enabled, vblank->inmodeset); |
| 1333 | |
| 1334 | /* Avoid redundant vblank disables without previous drm_vblank_on(). */ |
| 1335 | if (drm_core_check_feature(dev, DRIVER_ATOMIC) || !vblank->inmodeset) |
| 1336 | vblank_disable_and_save(dev, pipe); |
| 1337 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1338 | wake_up(&vblank->queue); |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1339 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1340 | /* |
| 1341 | * Prevent subsequent drm_vblank_get() from re-enabling |
| 1342 | * the vblank interrupt by bumping the refcount. |
| 1343 | */ |
| 1344 | if (!vblank->inmodeset) { |
| 1345 | atomic_inc(&vblank->refcount); |
| 1346 | vblank->inmodeset = 1; |
| 1347 | } |
| 1348 | spin_unlock(&dev->vbl_lock); |
| 1349 | |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1350 | /* Send any queued vblank events, lest the natives grow disquiet */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1351 | seq = drm_vblank_count_and_time(dev, pipe, &now); |
Imre Deak | e7783ba | 2012-11-02 13:30:50 +0200 | [diff] [blame] | 1352 | |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1353 | list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1354 | if (e->pipe != pipe) |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1355 | continue; |
Ville Syrjälä | 4484489 | 2015-10-09 22:57:36 +0300 | [diff] [blame] | 1356 | DRM_DEBUG("Sending premature vblank event on disable: " |
| 1357 | "wanted %d, current %d\n", |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1358 | e->event.sequence, seq); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1359 | list_del(&e->base.link); |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1360 | drm_vblank_put(dev, pipe); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1361 | send_vblank_event(dev, e, seq, &now); |
Christopher James Halse Rogers | 498548e | 2011-04-27 16:10:57 +1000 | [diff] [blame] | 1362 | } |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1363 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
Li Peng | 778c902 | 2009-11-09 12:51:22 +0800 | [diff] [blame] | 1364 | } |
| 1365 | EXPORT_SYMBOL(drm_vblank_off); |
| 1366 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1367 | /** |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1368 | * drm_crtc_vblank_off - disable vblank events on a CRTC |
| 1369 | * @crtc: CRTC in question |
| 1370 | * |
| 1371 | * Drivers can use this function to shut down the vblank interrupt handling when |
| 1372 | * disabling a crtc. This function ensures that the latest vblank frame count is |
| 1373 | * stored so that drm_vblank_on can restore it again. |
| 1374 | * |
| 1375 | * Drivers must use this function when the hardware vblank counter can get |
| 1376 | * reset, e.g. when suspending. |
| 1377 | * |
| 1378 | * This is the native kms version of drm_vblank_off(). |
| 1379 | */ |
| 1380 | void drm_crtc_vblank_off(struct drm_crtc *crtc) |
| 1381 | { |
| 1382 | drm_vblank_off(crtc->dev, drm_crtc_index(crtc)); |
| 1383 | } |
| 1384 | EXPORT_SYMBOL(drm_crtc_vblank_off); |
| 1385 | |
| 1386 | /** |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1387 | * drm_crtc_vblank_reset - reset vblank state to off on a CRTC |
Thierry Reding | 2b193f0 | 2015-09-24 18:35:30 +0200 | [diff] [blame] | 1388 | * @crtc: CRTC in question |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1389 | * |
| 1390 | * Drivers can use this function to reset the vblank state to off at load time. |
| 1391 | * Drivers should use this together with the drm_crtc_vblank_off() and |
| 1392 | * drm_crtc_vblank_on() functions. The difference compared to |
| 1393 | * drm_crtc_vblank_off() is that this function doesn't save the vblank counter |
| 1394 | * and hence doesn't need to call any driver hooks. |
| 1395 | */ |
Thierry Reding | 2b193f0 | 2015-09-24 18:35:30 +0200 | [diff] [blame] | 1396 | void drm_crtc_vblank_reset(struct drm_crtc *crtc) |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1397 | { |
Thierry Reding | 2b193f0 | 2015-09-24 18:35:30 +0200 | [diff] [blame] | 1398 | struct drm_device *dev = crtc->dev; |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1399 | unsigned long irqflags; |
Thierry Reding | 2b193f0 | 2015-09-24 18:35:30 +0200 | [diff] [blame] | 1400 | unsigned int pipe = drm_crtc_index(crtc); |
Ville Syrjälä | 1da248a | 2015-09-14 22:43:42 +0300 | [diff] [blame] | 1401 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Daniel Vetter | 9625604 | 2015-02-13 21:03:42 +0100 | [diff] [blame] | 1402 | |
| 1403 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
| 1404 | /* |
| 1405 | * Prevent subsequent drm_vblank_get() from enabling the vblank |
| 1406 | * interrupt by bumping the refcount. |
| 1407 | */ |
| 1408 | if (!vblank->inmodeset) { |
| 1409 | atomic_inc(&vblank->refcount); |
| 1410 | vblank->inmodeset = 1; |
| 1411 | } |
| 1412 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
| 1413 | |
| 1414 | WARN_ON(!list_empty(&dev->vblank_event_list)); |
| 1415 | } |
| 1416 | EXPORT_SYMBOL(drm_crtc_vblank_reset); |
| 1417 | |
| 1418 | /** |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1419 | * drm_vblank_on - enable vblank events on a CRTC |
| 1420 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1421 | * @pipe: CRTC index |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1422 | * |
| 1423 | * This functions restores the vblank interrupt state captured with |
| 1424 | * drm_vblank_off() again. Note that calls to drm_vblank_on() and |
Masanari Iida | 32197aa | 2014-10-20 23:53:13 +0900 | [diff] [blame] | 1425 | * drm_vblank_off() can be unbalanced and so can also be unconditionally called |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1426 | * in driver load code to reflect the current hardware state of the crtc. |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1427 | * |
| 1428 | * This is the legacy version of drm_crtc_vblank_on(). |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1429 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1430 | void drm_vblank_on(struct drm_device *dev, unsigned int pipe) |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1431 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1432 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1433 | unsigned long irqflags; |
| 1434 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1435 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1436 | return; |
| 1437 | |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1438 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
Mario Kleiner | e823589 | 2016-02-12 20:30:27 +0100 | [diff] [blame] | 1439 | DRM_DEBUG_VBL("crtc %d, vblank enabled %d, inmodeset %d\n", |
| 1440 | pipe, vblank->enabled, vblank->inmodeset); |
| 1441 | |
Ville Syrjälä | 7ffd7a6 | 2014-08-06 14:49:44 +0300 | [diff] [blame] | 1442 | /* Drop our private "prevent drm_vblank_get" refcount */ |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1443 | if (vblank->inmodeset) { |
| 1444 | atomic_dec(&vblank->refcount); |
| 1445 | vblank->inmodeset = 0; |
Ville Syrjälä | 7ffd7a6 | 2014-08-06 14:49:44 +0300 | [diff] [blame] | 1446 | } |
Ville Syrjälä | f8ad028 | 2014-08-06 14:49:49 +0300 | [diff] [blame] | 1447 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 1448 | drm_reset_vblank_timestamp(dev, pipe); |
| 1449 | |
Ville Syrjälä | cd19e52 | 2014-08-06 14:49:56 +0300 | [diff] [blame] | 1450 | /* |
| 1451 | * re-enable interrupts if there are users left, or the |
| 1452 | * user wishes vblank interrupts to be enabled all the time. |
| 1453 | */ |
Mario Kleiner | bb74fc1 | 2016-02-12 20:30:30 +0100 | [diff] [blame] | 1454 | if (atomic_read(&vblank->refcount) != 0 || drm_vblank_offdelay == 0) |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1455 | WARN_ON(drm_vblank_enable(dev, pipe)); |
Ville Syrjälä | f275228 | 2014-02-19 21:29:49 +0200 | [diff] [blame] | 1456 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
| 1457 | } |
| 1458 | EXPORT_SYMBOL(drm_vblank_on); |
| 1459 | |
| 1460 | /** |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1461 | * drm_crtc_vblank_on - enable vblank events on a CRTC |
| 1462 | * @crtc: CRTC in question |
| 1463 | * |
| 1464 | * This functions restores the vblank interrupt state captured with |
| 1465 | * drm_vblank_off() again. Note that calls to drm_vblank_on() and |
Masanari Iida | 32197aa | 2014-10-20 23:53:13 +0900 | [diff] [blame] | 1466 | * drm_vblank_off() can be unbalanced and so can also be unconditionally called |
Daniel Vetter | 89dd6a4 | 2014-05-15 15:32:12 +0200 | [diff] [blame] | 1467 | * in driver load code to reflect the current hardware state of the crtc. |
| 1468 | * |
| 1469 | * This is the native kms version of drm_vblank_on(). |
| 1470 | */ |
| 1471 | void drm_crtc_vblank_on(struct drm_crtc *crtc) |
| 1472 | { |
| 1473 | drm_vblank_on(crtc->dev, drm_crtc_index(crtc)); |
| 1474 | } |
| 1475 | EXPORT_SYMBOL(drm_crtc_vblank_on); |
| 1476 | |
| 1477 | /** |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1478 | * drm_vblank_pre_modeset - account for vblanks across mode sets |
| 1479 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1480 | * @pipe: CRTC index |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1481 | * |
| 1482 | * Account for vblank events across mode setting events, which will likely |
| 1483 | * reset the hardware frame counter. |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1484 | * |
| 1485 | * This is done by grabbing a temporary vblank reference to ensure that the |
| 1486 | * vblank interrupt keeps running across the modeset sequence. With this the |
| 1487 | * software-side vblank frame counting will ensure that there are no jumps or |
| 1488 | * discontinuities. |
| 1489 | * |
| 1490 | * Unfortunately this approach is racy and also doesn't work when the vblank |
| 1491 | * interrupt stops running, e.g. across system suspend resume. It is therefore |
| 1492 | * highly recommended that drivers use the newer drm_vblank_off() and |
| 1493 | * drm_vblank_on() instead. drm_vblank_pre_modeset() only works correctly when |
| 1494 | * using "cooked" software vblank frame counters and not relying on any hardware |
| 1495 | * counters. |
| 1496 | * |
| 1497 | * Drivers must call drm_vblank_post_modeset() when re-enabling the same crtc |
| 1498 | * again. |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1499 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1500 | void drm_vblank_pre_modeset(struct drm_device *dev, unsigned int pipe) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1501 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1502 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1503 | |
Huacai Chen | b7ea85a4 | 2013-05-21 06:23:43 +0000 | [diff] [blame] | 1504 | /* vblank is not initialized (IRQ not installed ?), or has been freed */ |
Jerome Glisse | e77cef9 | 2010-01-07 15:39:13 +0100 | [diff] [blame] | 1505 | if (!dev->num_crtcs) |
| 1506 | return; |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1507 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1508 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1509 | return; |
| 1510 | |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1511 | /* |
| 1512 | * To avoid all the problems that might happen if interrupts |
| 1513 | * were enabled/disabled around or between these calls, we just |
| 1514 | * have the kernel take a reference on the CRTC (just once though |
| 1515 | * to avoid corrupting the count if multiple, mismatch calls occur), |
| 1516 | * so that interrupts remain enabled in the interim. |
| 1517 | */ |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1518 | if (!vblank->inmodeset) { |
| 1519 | vblank->inmodeset = 0x1; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1520 | if (drm_vblank_get(dev, pipe) == 0) |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1521 | vblank->inmodeset |= 0x2; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1522 | } |
| 1523 | } |
| 1524 | EXPORT_SYMBOL(drm_vblank_pre_modeset); |
| 1525 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1526 | /** |
| 1527 | * drm_vblank_post_modeset - undo drm_vblank_pre_modeset changes |
| 1528 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1529 | * @pipe: CRTC index |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1530 | * |
| 1531 | * This function again drops the temporary vblank reference acquired in |
| 1532 | * drm_vblank_pre_modeset. |
| 1533 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1534 | void drm_vblank_post_modeset(struct drm_device *dev, unsigned int pipe) |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1535 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1536 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1537 | unsigned long irqflags; |
| 1538 | |
Huacai Chen | b7ea85a4 | 2013-05-21 06:23:43 +0000 | [diff] [blame] | 1539 | /* vblank is not initialized (IRQ not installed ?), or has been freed */ |
| 1540 | if (!dev->num_crtcs) |
| 1541 | return; |
| 1542 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1543 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Thierry Reding | 7d1de85 | 2015-08-12 17:00:30 +0200 | [diff] [blame] | 1544 | return; |
| 1545 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1546 | if (vblank->inmodeset) { |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1547 | spin_lock_irqsave(&dev->vbl_lock, irqflags); |
Mario Kleiner | c61934e | 2016-02-12 20:30:29 +0100 | [diff] [blame] | 1548 | drm_reset_vblank_timestamp(dev, pipe); |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1549 | spin_unlock_irqrestore(&dev->vbl_lock, irqflags); |
Chris Wilson | b3f5e73 | 2009-02-19 14:48:22 +0000 | [diff] [blame] | 1550 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1551 | if (vblank->inmodeset & 0x2) |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1552 | drm_vblank_put(dev, pipe); |
Chris Wilson | b3f5e73 | 2009-02-19 14:48:22 +0000 | [diff] [blame] | 1553 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1554 | vblank->inmodeset = 0; |
Dave Airlie | f453ba0 | 2008-11-07 14:05:41 -0800 | [diff] [blame] | 1555 | } |
| 1556 | } |
| 1557 | EXPORT_SYMBOL(drm_vblank_post_modeset); |
| 1558 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1559 | /* |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1560 | * drm_modeset_ctl - handle vblank event counter changes across mode switch |
| 1561 | * @DRM_IOCTL_ARGS: standard ioctl arguments |
| 1562 | * |
| 1563 | * Applications should call the %_DRM_PRE_MODESET and %_DRM_POST_MODESET |
| 1564 | * ioctls around modesetting so that any lost vblank events are accounted for. |
| 1565 | * |
| 1566 | * Generally the counter will reset across mode sets. If interrupts are |
| 1567 | * enabled around this call, we don't have to do anything since the counter |
| 1568 | * will have already been incremented. |
| 1569 | */ |
| 1570 | int drm_modeset_ctl(struct drm_device *dev, void *data, |
| 1571 | struct drm_file *file_priv) |
| 1572 | { |
| 1573 | struct drm_modeset_ctl *modeset = data; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1574 | unsigned int pipe; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1575 | |
| 1576 | /* If drm_vblank_init() hasn't been called yet, just no-op */ |
| 1577 | if (!dev->num_crtcs) |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1578 | return 0; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1579 | |
Laurent Pinchart | 2993555 | 2012-05-30 00:58:09 +0200 | [diff] [blame] | 1580 | /* KMS drivers handle this internally */ |
| 1581 | if (drm_core_check_feature(dev, DRIVER_MODESET)) |
| 1582 | return 0; |
| 1583 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1584 | pipe = modeset->crtc; |
| 1585 | if (pipe >= dev->num_crtcs) |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1586 | return -EINVAL; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1587 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1588 | switch (modeset->cmd) { |
| 1589 | case _DRM_PRE_MODESET: |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1590 | drm_vblank_pre_modeset(dev, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1591 | break; |
| 1592 | case _DRM_POST_MODESET: |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1593 | drm_vblank_post_modeset(dev, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1594 | break; |
| 1595 | default: |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1596 | return -EINVAL; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1597 | } |
| 1598 | |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1599 | return 0; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1600 | } |
| 1601 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1602 | static int drm_queue_vblank_event(struct drm_device *dev, unsigned int pipe, |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1603 | union drm_wait_vblank *vblwait, |
| 1604 | struct drm_file *file_priv) |
| 1605 | { |
Ville Syrjälä | ffe7c73 | 2014-08-06 14:49:52 +0300 | [diff] [blame] | 1606 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1607 | struct drm_pending_vblank_event *e; |
| 1608 | struct timeval now; |
| 1609 | unsigned long flags; |
| 1610 | unsigned int seq; |
Chris Wilson | ea5d552 | 2010-12-01 19:41:31 +0000 | [diff] [blame] | 1611 | int ret; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1612 | |
Thierry Reding | f76511b | 2014-12-10 13:03:40 +0100 | [diff] [blame] | 1613 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
Chris Wilson | ea5d552 | 2010-12-01 19:41:31 +0000 | [diff] [blame] | 1614 | if (e == NULL) { |
| 1615 | ret = -ENOMEM; |
| 1616 | goto err_put; |
| 1617 | } |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1618 | |
| 1619 | e->pipe = pipe; |
Jesse Barnes | b9c2c9a | 2010-07-01 16:48:09 -0700 | [diff] [blame] | 1620 | e->base.pid = current->pid; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1621 | e->event.base.type = DRM_EVENT_VBLANK; |
Thierry Reding | f76511b | 2014-12-10 13:03:40 +0100 | [diff] [blame] | 1622 | e->event.base.length = sizeof(e->event); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1623 | e->event.user_data = vblwait->request.signal; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1624 | |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1625 | spin_lock_irqsave(&dev->event_lock, flags); |
| 1626 | |
Ville Syrjälä | ffe7c73 | 2014-08-06 14:49:52 +0300 | [diff] [blame] | 1627 | /* |
| 1628 | * drm_vblank_off() might have been called after we called |
| 1629 | * drm_vblank_get(). drm_vblank_off() holds event_lock |
| 1630 | * around the vblank disable, so no need for further locking. |
| 1631 | * The reference from drm_vblank_get() protects against |
| 1632 | * vblank disable from another source. |
| 1633 | */ |
| 1634 | if (!vblank->enabled) { |
| 1635 | ret = -EINVAL; |
| 1636 | goto err_unlock; |
| 1637 | } |
| 1638 | |
Daniel Vetter | 4020b22 | 2016-01-28 12:01:04 +0100 | [diff] [blame] | 1639 | ret = drm_event_reserve_init_locked(dev, file_priv, &e->base, |
| 1640 | &e->event.base); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1641 | |
Daniel Vetter | 4020b22 | 2016-01-28 12:01:04 +0100 | [diff] [blame] | 1642 | if (ret) |
| 1643 | goto err_unlock; |
| 1644 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1645 | seq = drm_vblank_count_and_time(dev, pipe, &now); |
| 1646 | |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1647 | if ((vblwait->request.type & _DRM_VBLANK_NEXTONMISS) && |
| 1648 | (seq - vblwait->request.sequence) <= (1 << 23)) { |
| 1649 | vblwait->request.sequence = seq + 1; |
Jesse Barnes | 4a92164 | 2009-11-10 08:21:25 +0000 | [diff] [blame] | 1650 | vblwait->reply.sequence = vblwait->request.sequence; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1651 | } |
| 1652 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1653 | DRM_DEBUG("event on vblank count %d, current %d, crtc %u\n", |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1654 | vblwait->request.sequence, seq, pipe); |
| 1655 | |
Jesse Barnes | b9c2c9a | 2010-07-01 16:48:09 -0700 | [diff] [blame] | 1656 | trace_drm_vblank_event_queued(current->pid, pipe, |
| 1657 | vblwait->request.sequence); |
| 1658 | |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1659 | e->event.sequence = vblwait->request.sequence; |
| 1660 | if ((seq - vblwait->request.sequence) <= (1 << 23)) { |
Dan Carpenter | 6f33162 | 2010-12-09 08:35:40 +0300 | [diff] [blame] | 1661 | drm_vblank_put(dev, pipe); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1662 | send_vblank_event(dev, e, seq, &now); |
Mario Kleiner | 000fa7c | 2010-12-10 16:00:19 +0100 | [diff] [blame] | 1663 | vblwait->reply.sequence = seq; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1664 | } else { |
Ilija Hadzic | a6778e9 | 2011-10-31 13:11:57 -0400 | [diff] [blame] | 1665 | /* drm_handle_vblank_events will call drm_vblank_put */ |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1666 | list_add_tail(&e->base.link, &dev->vblank_event_list); |
Mario Kleiner | 000fa7c | 2010-12-10 16:00:19 +0100 | [diff] [blame] | 1667 | vblwait->reply.sequence = vblwait->request.sequence; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1668 | } |
| 1669 | |
| 1670 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 1671 | |
| 1672 | return 0; |
Chris Wilson | ea5d552 | 2010-12-01 19:41:31 +0000 | [diff] [blame] | 1673 | |
| 1674 | err_unlock: |
| 1675 | spin_unlock_irqrestore(&dev->event_lock, flags); |
| 1676 | kfree(e); |
| 1677 | err_put: |
Dan Carpenter | 6f33162 | 2010-12-09 08:35:40 +0300 | [diff] [blame] | 1678 | drm_vblank_put(dev, pipe); |
Chris Wilson | ea5d552 | 2010-12-01 19:41:31 +0000 | [diff] [blame] | 1679 | return ret; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1680 | } |
| 1681 | |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1682 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | * Wait for VBLANK. |
| 1684 | * |
| 1685 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 1686 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | * \param cmd command. |
| 1688 | * \param data user argument, pointing to a drm_wait_vblank structure. |
| 1689 | * \return zero on success or a negative number on failure. |
| 1690 | * |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1691 | * This function enables the vblank interrupt on the pipe requested, then |
| 1692 | * sleeps waiting for the requested sequence number to occur, and drops |
Daniel Vetter | f5752b3 | 2014-05-08 16:41:51 +0200 | [diff] [blame] | 1693 | * the vblank interrupt refcount afterwards. (vblank IRQ disable follows that |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1694 | * after a timeout with no further vblank waits scheduled). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | */ |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1696 | int drm_wait_vblank(struct drm_device *dev, void *data, |
| 1697 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | { |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1699 | struct drm_vblank_crtc *vblank; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1700 | union drm_wait_vblank *vblwait = data; |
Laurent Pinchart | 4a1b071 | 2012-05-17 13:27:21 +0200 | [diff] [blame] | 1701 | int ret; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1702 | unsigned int flags, seq, pipe, high_pipe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | |
Daniel Vetter | 4984979 | 2013-08-28 15:02:37 +0200 | [diff] [blame] | 1704 | if (!dev->irq_enabled) |
| 1705 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1707 | if (vblwait->request.type & _DRM_VBLANK_SIGNAL) |
| 1708 | return -EINVAL; |
| 1709 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1710 | if (vblwait->request.type & |
Ilija Hadzic | 19b01b5 | 2011-03-18 16:58:04 -0500 | [diff] [blame] | 1711 | ~(_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK | |
| 1712 | _DRM_VBLANK_HIGH_CRTC_MASK)) { |
=?utf-8?q?Michel_D=C3=A4nzer?= | 776c944 | 2006-10-24 22:24:38 +1000 | [diff] [blame] | 1713 | DRM_ERROR("Unsupported type value 0x%x, supported mask 0x%x\n", |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1714 | vblwait->request.type, |
Ilija Hadzic | 19b01b5 | 2011-03-18 16:58:04 -0500 | [diff] [blame] | 1715 | (_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK | |
| 1716 | _DRM_VBLANK_HIGH_CRTC_MASK)); |
=?utf-8?q?Michel_D=C3=A4nzer?= | 776c944 | 2006-10-24 22:24:38 +1000 | [diff] [blame] | 1717 | return -EINVAL; |
| 1718 | } |
| 1719 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1720 | flags = vblwait->request.type & _DRM_VBLANK_FLAGS_MASK; |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1721 | high_pipe = (vblwait->request.type & _DRM_VBLANK_HIGH_CRTC_MASK); |
| 1722 | if (high_pipe) |
| 1723 | pipe = high_pipe >> _DRM_VBLANK_HIGH_CRTC_SHIFT; |
Ilija Hadzic | 19b01b5 | 2011-03-18 16:58:04 -0500 | [diff] [blame] | 1724 | else |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1725 | pipe = flags & _DRM_VBLANK_SECONDARY ? 1 : 0; |
| 1726 | if (pipe >= dev->num_crtcs) |
=?utf-8?q?Michel_D=C3=A4nzer?= | 776c944 | 2006-10-24 22:24:38 +1000 | [diff] [blame] | 1727 | return -EINVAL; |
| 1728 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1729 | vblank = &dev->vblank[pipe]; |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1730 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1731 | ret = drm_vblank_get(dev, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1732 | if (ret) { |
Paul Rolland | 8d3457e | 2009-08-09 12:24:01 +1000 | [diff] [blame] | 1733 | DRM_DEBUG("failed to acquire vblank counter, %d\n", ret); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1734 | return ret; |
| 1735 | } |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1736 | seq = drm_vblank_count(dev, pipe); |
=?utf-8?q?Michel_D=C3=A4nzer?= | 776c944 | 2006-10-24 22:24:38 +1000 | [diff] [blame] | 1737 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1738 | switch (vblwait->request.type & _DRM_VBLANK_TYPES_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | case _DRM_VBLANK_RELATIVE: |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1740 | vblwait->request.sequence += seq; |
| 1741 | vblwait->request.type &= ~_DRM_VBLANK_RELATIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | case _DRM_VBLANK_ABSOLUTE: |
| 1743 | break; |
| 1744 | default: |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1745 | ret = -EINVAL; |
| 1746 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | } |
| 1748 | |
Ilija Hadzic | a6778e9 | 2011-10-31 13:11:57 -0400 | [diff] [blame] | 1749 | if (flags & _DRM_VBLANK_EVENT) { |
| 1750 | /* must hold on to the vblank ref until the event fires |
| 1751 | * drm_vblank_put will be called asynchronously |
| 1752 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1753 | return drm_queue_vblank_event(dev, pipe, vblwait, file_priv); |
Ilija Hadzic | a6778e9 | 2011-10-31 13:11:57 -0400 | [diff] [blame] | 1754 | } |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1755 | |
=?utf-8?q?Michel_D=C3=A4nzer?= | ab285d7 | 2006-10-24 23:34:18 +1000 | [diff] [blame] | 1756 | if ((flags & _DRM_VBLANK_NEXTONMISS) && |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 1757 | (seq - vblwait->request.sequence) <= (1<<23)) { |
| 1758 | vblwait->request.sequence = seq + 1; |
=?utf-8?q?Michel_D=C3=A4nzer?= | ab285d7 | 2006-10-24 23:34:18 +1000 | [diff] [blame] | 1759 | } |
| 1760 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1761 | DRM_DEBUG("waiting on vblank count %d, crtc %u\n", |
| 1762 | vblwait->request.sequence, pipe); |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1763 | vblank->last_wait = vblwait->request.sequence; |
| 1764 | DRM_WAIT_ON(ret, vblank->queue, 3 * HZ, |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1765 | (((drm_vblank_count(dev, pipe) - |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1766 | vblwait->request.sequence) <= (1 << 23)) || |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1767 | !vblank->enabled || |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1768 | !dev->irq_enabled)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1770 | if (ret != -EINTR) { |
| 1771 | struct timeval now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1773 | vblwait->reply.sequence = drm_vblank_count_and_time(dev, pipe, &now); |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1774 | vblwait->reply.tval_sec = now.tv_sec; |
| 1775 | vblwait->reply.tval_usec = now.tv_usec; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1776 | |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1777 | DRM_DEBUG("returning %d to client\n", |
| 1778 | vblwait->reply.sequence); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | } else { |
Eric Anholt | 30b2363 | 2009-01-27 21:19:41 -0800 | [diff] [blame] | 1780 | DRM_DEBUG("vblank wait interrupted by signal\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | } |
| 1782 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1783 | done: |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1784 | drm_vblank_put(dev, pipe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | return ret; |
| 1786 | } |
| 1787 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1788 | static void drm_handle_vblank_events(struct drm_device *dev, unsigned int pipe) |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1789 | { |
| 1790 | struct drm_pending_vblank_event *e, *t; |
| 1791 | struct timeval now; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1792 | unsigned int seq; |
| 1793 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1794 | assert_spin_locked(&dev->event_lock); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1795 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1796 | seq = drm_vblank_count_and_time(dev, pipe, &now); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1797 | |
| 1798 | list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1799 | if (e->pipe != pipe) |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1800 | continue; |
| 1801 | if ((seq - e->event.sequence) > (1<<23)) |
| 1802 | continue; |
| 1803 | |
| 1804 | DRM_DEBUG("vblank event on %d, current %d\n", |
| 1805 | e->event.sequence, seq); |
| 1806 | |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1807 | list_del(&e->base.link); |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1808 | drm_vblank_put(dev, pipe); |
Rob Clark | c6eefa1 | 2012-10-16 22:48:40 +0000 | [diff] [blame] | 1809 | send_vblank_event(dev, e, seq, &now); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1810 | } |
| 1811 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1812 | trace_drm_vblank_event(pipe, seq); |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1813 | } |
| 1814 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | /** |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1816 | * drm_handle_vblank - handle a vblank event |
| 1817 | * @dev: DRM device |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1818 | * @pipe: index of CRTC where this event occurred |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1819 | * |
| 1820 | * Drivers should call this routine in their vblank interrupt handlers to |
| 1821 | * update the vblank counter and send any signals that may be pending. |
Thierry Reding | 115ebcd | 2014-12-15 14:47:18 +0100 | [diff] [blame] | 1822 | * |
| 1823 | * This is the legacy version of drm_crtc_handle_vblank(). |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1824 | */ |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1825 | bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1826 | { |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1827 | struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1828 | unsigned long irqflags; |
| 1829 | |
Daniel Vetter | ee3c779 | 2015-02-22 15:11:20 +0100 | [diff] [blame] | 1830 | if (WARN_ON_ONCE(!dev->num_crtcs)) |
Chris Wilson | 78c6e17 | 2011-01-31 10:48:04 +0000 | [diff] [blame] | 1831 | return false; |
Kristian Høgsberg | c9a9c5e | 2009-09-12 04:33:34 +1000 | [diff] [blame] | 1832 | |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1833 | if (WARN_ON(pipe >= dev->num_crtcs)) |
Rob Clark | e6ae868 | 2014-08-06 13:16:59 -0400 | [diff] [blame] | 1834 | return false; |
| 1835 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1836 | spin_lock_irqsave(&dev->event_lock, irqflags); |
| 1837 | |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1838 | /* Need timestamp lock to prevent concurrent execution with |
| 1839 | * vblank enable/disable, as this would cause inconsistent |
| 1840 | * or corrupted timestamps and vblank counts. |
| 1841 | */ |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1842 | spin_lock(&dev->vblank_time_lock); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1843 | |
| 1844 | /* Vblank irq handling disabled. Nothing to do. */ |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1845 | if (!vblank->enabled) { |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1846 | spin_unlock(&dev->vblank_time_lock); |
| 1847 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
Chris Wilson | 78c6e17 | 2011-01-31 10:48:04 +0000 | [diff] [blame] | 1848 | return false; |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1849 | } |
| 1850 | |
Ville Syrjälä | 4dfd648 | 2015-09-14 22:43:51 +0300 | [diff] [blame] | 1851 | drm_update_vblank_count(dev, pipe, DRM_CALLED_FROM_VBLIRQ); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1852 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1853 | spin_unlock(&dev->vblank_time_lock); |
| 1854 | |
Ville Syrjälä | 8a51d5b | 2014-08-06 14:49:50 +0300 | [diff] [blame] | 1855 | wake_up(&vblank->queue); |
Thierry Reding | cc1ef11 | 2015-08-12 17:00:31 +0200 | [diff] [blame] | 1856 | drm_handle_vblank_events(dev, pipe); |
Mario Kleiner | 27641c3 | 2010-10-23 04:20:23 +0200 | [diff] [blame] | 1857 | |
Ville Syrjälä | 56cc279 | 2014-08-06 14:49:51 +0300 | [diff] [blame] | 1858 | spin_unlock_irqrestore(&dev->event_lock, irqflags); |
| 1859 | |
Chris Wilson | 78c6e17 | 2011-01-31 10:48:04 +0000 | [diff] [blame] | 1860 | return true; |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 1861 | } |
| 1862 | EXPORT_SYMBOL(drm_handle_vblank); |
Thierry Reding | 115ebcd | 2014-12-15 14:47:18 +0100 | [diff] [blame] | 1863 | |
| 1864 | /** |
| 1865 | * drm_crtc_handle_vblank - handle a vblank event |
| 1866 | * @crtc: where this event occurred |
| 1867 | * |
| 1868 | * Drivers should call this routine in their vblank interrupt handlers to |
| 1869 | * update the vblank counter and send any signals that may be pending. |
| 1870 | * |
| 1871 | * This is the native KMS version of drm_handle_vblank(). |
| 1872 | * |
| 1873 | * Returns: |
| 1874 | * True if the event was successfully handled, false on failure. |
| 1875 | */ |
| 1876 | bool drm_crtc_handle_vblank(struct drm_crtc *crtc) |
| 1877 | { |
| 1878 | return drm_handle_vblank(crtc->dev, drm_crtc_index(crtc)); |
| 1879 | } |
| 1880 | EXPORT_SYMBOL(drm_crtc_handle_vblank); |
Ville Syrjälä | b44f840 | 2015-09-30 16:46:48 +0300 | [diff] [blame] | 1881 | |
| 1882 | /** |
| 1883 | * drm_vblank_no_hw_counter - "No hw counter" implementation of .get_vblank_counter() |
| 1884 | * @dev: DRM device |
| 1885 | * @pipe: CRTC for which to read the counter |
| 1886 | * |
| 1887 | * Drivers can plug this into the .get_vblank_counter() function if |
| 1888 | * there is no useable hardware frame counter available. |
| 1889 | * |
| 1890 | * Returns: |
| 1891 | * 0 |
| 1892 | */ |
| 1893 | u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe) |
| 1894 | { |
| 1895 | return 0; |
| 1896 | } |
| 1897 | EXPORT_SYMBOL(drm_vblank_no_hw_counter); |