blob: 9297a61a7c95ba390a259b0eb3b735bc0911dc59 [file] [log] [blame]
Dave Airlief453ba02008-11-07 14:05:41 -08001/*
2 * Copyright (c) 2006-2008 Intel Corporation
3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
4 *
5 * DRM core CRTC related functions
6 *
7 * Permission to use, copy, modify, distribute, and sell this software and its
8 * documentation for any purpose is hereby granted without fee, provided that
9 * the above copyright notice appear in all copies and that both that copyright
10 * notice and this permission notice appear in supporting documentation, and
11 * that the name of the copyright holders not be used in advertising or
12 * publicity pertaining to distribution of the software without specific,
13 * written prior permission. The copyright holders make no representations
14 * about the suitability of this software for any purpose. It is provided "as
15 * is" without express or implied warranty.
16 *
17 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
19 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
22 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
23 * OF THIS SOFTWARE.
24 *
25 * Authors:
26 * Keith Packard
27 * Eric Anholt <eric@anholt.net>
28 * Dave Airlie <airlied@linux.ie>
29 * Jesse Barnes <jesse.barnes@intel.com>
30 */
31
Sergei Antonovba6f5822014-05-12 00:30:48 +020032#include <linux/kernel.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040033#include <linux/export.h>
Paul Gortmaker0603ba12011-08-31 11:29:09 -040034#include <linux/moduleparam.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040035
David Howells760285e2012-10-02 18:01:07 +010036#include <drm/drmP.h>
Daniel Vetter321ebf02014-11-04 22:57:27 +010037#include <drm/drm_atomic.h>
David Howells760285e2012-10-02 18:01:07 +010038#include <drm/drm_crtc.h>
39#include <drm/drm_fourcc.h>
40#include <drm/drm_crtc_helper.h>
41#include <drm/drm_fb_helper.h>
Daniel Vetter2f324b42014-10-29 11:13:47 +010042#include <drm/drm_plane_helper.h>
Daniel Vetter321ebf02014-11-04 22:57:27 +010043#include <drm/drm_atomic_helper.h>
David Howells760285e2012-10-02 18:01:07 +010044#include <drm/drm_edid.h>
Dave Airlief453ba02008-11-07 14:05:41 -080045
Daniel Vetter3150c7d2014-11-06 20:53:29 +010046/**
47 * DOC: overview
48 *
49 * The CRTC modeset helper library provides a default set_config implementation
50 * in drm_crtc_helper_set_config(). Plus a few other convenience functions using
51 * the same callbacks which drivers can use to e.g. restore the modeset
52 * configuration on resume with drm_helper_resume_force_mode().
53 *
54 * The driver callbacks are mostly compatible with the atomic modeset helpers,
55 * except for the handling of the primary plane: Atomic helpers require that the
56 * primary plane is implemented as a real standalone plane and not directly tied
57 * to the CRTC state. For easier transition this library provides functions to
58 * implement the old semantics required by the CRTC helpers using the new plane
59 * and atomic helper callbacks.
60 *
61 * Drivers are strongly urged to convert to the atomic helpers (by way of first
62 * converting to the plane helpers). New drivers must not use these functions
63 * but need to implement the atomic interface instead, potentially using the
64 * atomic helpers for that.
65 */
Daniel Vetter92b6f892013-10-08 17:44:47 +020066MODULE_AUTHOR("David Airlie, Jesse Barnes");
67MODULE_DESCRIPTION("DRM KMS helper");
68MODULE_LICENSE("GPL and additional rights");
69
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +010070/**
71 * drm_helper_move_panel_connectors_to_head() - move panels to the front in the
72 * connector list
73 * @dev: drm device to operate on
74 *
75 * Some userspace presumes that the first connected connector is the main
76 * display, where it's supposed to display e.g. the login screen. For
77 * laptops, this should be the main panel. Use this function to sort all
78 * (eDP/LVDS) panels to the front of the connector list, instead of
79 * painstakingly trying to initialize them in the right order.
80 */
Daniel Vettercfc1a062012-10-27 15:52:04 +020081void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
82{
83 struct drm_connector *connector, *tmp;
84 struct list_head panel_list;
85
86 INIT_LIST_HEAD(&panel_list);
87
88 list_for_each_entry_safe(connector, tmp,
89 &dev->mode_config.connector_list, head) {
90 if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
91 connector->connector_type == DRM_MODE_CONNECTOR_eDP)
92 list_move_tail(&connector->head, &panel_list);
93 }
94
95 list_splice(&panel_list, &dev->mode_config.connector_list);
96}
97EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
98
Dave Airlief453ba02008-11-07 14:05:41 -080099/**
Keith Packardc9fb15f2009-05-30 20:42:28 -0700100 * drm_helper_encoder_in_use - check if a given encoder is in use
101 * @encoder: encoder to check
102 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100103 * Checks whether @encoder is with the current mode setting output configuration
104 * in use by any connector. This doesn't mean that it is actually enabled since
105 * the DPMS state is tracked separately.
Keith Packardc9fb15f2009-05-30 20:42:28 -0700106 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100107 * Returns:
108 * True if @encoder is used, false otherwise.
Keith Packardc9fb15f2009-05-30 20:42:28 -0700109 */
110bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
111{
112 struct drm_connector *connector;
113 struct drm_device *dev = encoder->dev;
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100114
Sergei Antonovba6f5822014-05-12 00:30:48 +0200115 /*
116 * We can expect this mutex to be locked if we are not panicking.
117 * Locking is currently fubar in the panic handler.
118 */
Dave Airlie8d4ad9d2014-06-05 20:28:59 +1000119 if (!oops_in_progress) {
Sergei Antonovba6f5822014-05-12 00:30:48 +0200120 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
Dave Airlie8d4ad9d2014-06-05 20:28:59 +1000121 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
122 }
Sergei Antonovba6f5822014-05-12 00:30:48 +0200123
Keith Packardc9fb15f2009-05-30 20:42:28 -0700124 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
125 if (connector->encoder == encoder)
126 return true;
127 return false;
128}
129EXPORT_SYMBOL(drm_helper_encoder_in_use);
130
131/**
Dave Airlief453ba02008-11-07 14:05:41 -0800132 * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
133 * @crtc: CRTC to check
134 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100135 * Checks whether @crtc is with the current mode setting output configuration
136 * in use by any connector. This doesn't mean that it is actually enabled since
137 * the DPMS state is tracked separately.
Dave Airlief453ba02008-11-07 14:05:41 -0800138 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100139 * Returns:
140 * True if @crtc is used, false otherwise.
Dave Airlief453ba02008-11-07 14:05:41 -0800141 */
142bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
143{
144 struct drm_encoder *encoder;
145 struct drm_device *dev = crtc->dev;
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100146
Sergei Antonovba6f5822014-05-12 00:30:48 +0200147 /*
148 * We can expect this mutex to be locked if we are not panicking.
149 * Locking is currently fubar in the panic handler.
150 */
151 if (!oops_in_progress)
152 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
153
Dave Airlief453ba02008-11-07 14:05:41 -0800154 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
Keith Packardc9fb15f2009-05-30 20:42:28 -0700155 if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
Dave Airlief453ba02008-11-07 14:05:41 -0800156 return true;
157 return false;
158}
159EXPORT_SYMBOL(drm_helper_crtc_in_use);
160
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000161static void
162drm_encoder_disable(struct drm_encoder *encoder)
163{
Jani Nikulabe26a662015-03-11 11:51:06 +0200164 const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000165
Archit Taneja862e6862015-05-21 11:03:16 +0530166 drm_bridge_disable(encoder->bridge);
Sean Paul3b336ec2013-08-14 16:47:37 -0400167
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000168 if (encoder_funcs->disable)
169 (*encoder_funcs->disable)(encoder);
170 else
171 (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
Sean Paul3b336ec2013-08-14 16:47:37 -0400172
Archit Taneja862e6862015-05-21 11:03:16 +0530173 drm_bridge_post_disable(encoder->bridge);
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000174}
175
Daniel Vetterb182cc52014-03-20 14:26:34 +0100176static void __drm_helper_disable_unused_functions(struct drm_device *dev)
Dave Airlief453ba02008-11-07 14:05:41 -0800177{
178 struct drm_encoder *encoder;
Dave Airlief453ba02008-11-07 14:05:41 -0800179 struct drm_crtc *crtc;
180
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100181 drm_warn_on_modeset_not_all_locked(dev);
182
Dave Airlief453ba02008-11-07 14:05:41 -0800183 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
Dave Airlie929710212010-12-21 12:47:56 +1000184 if (!drm_helper_encoder_in_use(encoder)) {
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000185 drm_encoder_disable(encoder);
Rob Clarkb5e6c1d2014-05-24 14:30:10 -0400186 /* disconnect encoder from any connector */
Dave Airlie9c552dd2009-09-02 14:00:11 +1000187 encoder->crtc = NULL;
Dave Airliea3a05442009-08-31 15:16:30 +1000188 }
Dave Airlief453ba02008-11-07 14:05:41 -0800189 }
190
191 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
Jani Nikulabe26a662015-03-11 11:51:06 +0200192 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
Dave Airlief453ba02008-11-07 14:05:41 -0800193 crtc->enabled = drm_helper_crtc_in_use(crtc);
194 if (!crtc->enabled) {
Alex Deucher5c8d7172010-06-11 17:04:35 -0400195 if (crtc_funcs->disable)
196 (*crtc_funcs->disable)(crtc);
197 else
198 (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
Matt Roperf4510a22014-04-01 15:22:40 -0700199 crtc->primary->fb = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800200 }
201 }
202}
Daniel Vetterb182cc52014-03-20 14:26:34 +0100203
204/**
205 * drm_helper_disable_unused_functions - disable unused objects
206 * @dev: DRM device
207 *
208 * This function walks through the entire mode setting configuration of @dev. It
209 * will remove any crtc links of unused encoders and encoder links of
210 * disconnected connectors. Then it will disable all unused encoders and crtcs
211 * either by calling their disable callback if available or by calling their
212 * dpms callback with DRM_MODE_DPMS_OFF.
213 */
214void drm_helper_disable_unused_functions(struct drm_device *dev)
215{
216 drm_modeset_lock_all(dev);
217 __drm_helper_disable_unused_functions(dev);
218 drm_modeset_unlock_all(dev);
219}
Dave Airlief453ba02008-11-07 14:05:41 -0800220EXPORT_SYMBOL(drm_helper_disable_unused_functions);
221
Jesse Barnes7bec7562009-02-23 16:09:34 -0800222/*
223 * Check the CRTC we're going to map each output to vs. its current
224 * CRTC. If they don't match, we have to disable the output and the CRTC
225 * since the driver will have to re-route things.
226 */
227static void
228drm_crtc_prepare_encoders(struct drm_device *dev)
229{
Jani Nikulabe26a662015-03-11 11:51:06 +0200230 const struct drm_encoder_helper_funcs *encoder_funcs;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800231 struct drm_encoder *encoder;
232
233 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
234 encoder_funcs = encoder->helper_private;
235 /* Disable unused encoders */
236 if (encoder->crtc == NULL)
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000237 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800238 /* Disable encoders whose CRTC is about to change */
239 if (encoder_funcs->get_crtc &&
240 encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
Ben Skeggs86a1b9d2010-07-01 16:49:57 +1000241 drm_encoder_disable(encoder);
Jesse Barnes7bec7562009-02-23 16:09:34 -0800242 }
243}
244
Dave Airlief453ba02008-11-07 14:05:41 -0800245/**
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100246 * drm_crtc_helper_set_mode - internal helper to set a mode
Dave Airlief453ba02008-11-07 14:05:41 -0800247 * @crtc: CRTC to program
248 * @mode: mode to use
Alex Deucher4c9287c2012-11-09 17:26:32 +0000249 * @x: horizontal offset into the surface
250 * @y: vertical offset into the surface
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100251 * @old_fb: old framebuffer, for cleanup
Dave Airlief453ba02008-11-07 14:05:41 -0800252 *
Dave Airlief453ba02008-11-07 14:05:41 -0800253 * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100254 * to fixup or reject the mode prior to trying to set it. This is an internal
255 * helper that drivers could e.g. use to update properties that require the
256 * entire output pipe to be disabled and re-enabled in a new configuration. For
257 * example for changing whether audio is enabled on a hdmi link or for changing
258 * panel fitter or dither attributes. It is also called by the
259 * drm_crtc_helper_set_config() helper function to drive the mode setting
260 * sequence.
Dave Airlief453ba02008-11-07 14:05:41 -0800261 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100262 * Returns:
263 * True if the mode was set successfully, false otherwise.
Dave Airlief453ba02008-11-07 14:05:41 -0800264 */
265bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
266 struct drm_display_mode *mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500267 int x, int y,
268 struct drm_framebuffer *old_fb)
Dave Airlief453ba02008-11-07 14:05:41 -0800269{
270 struct drm_device *dev = crtc->dev;
Daniel Stone5a275282015-03-19 04:33:03 +0000271 struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
Jani Nikulabe26a662015-03-11 11:51:06 +0200272 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
273 const struct drm_encoder_helper_funcs *encoder_funcs;
Dave Airlief453ba02008-11-07 14:05:41 -0800274 int saved_x, saved_y;
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400275 bool saved_enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800276 struct drm_encoder *encoder;
277 bool ret = true;
278
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100279 drm_warn_on_modeset_not_all_locked(dev);
280
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400281 saved_enabled = crtc->enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800282 crtc->enabled = drm_helper_crtc_in_use(crtc);
Dave Airlief453ba02008-11-07 14:05:41 -0800283 if (!crtc->enabled)
284 return true;
285
Chris Wilson021a8452011-01-28 11:31:56 +0000286 adjusted_mode = drm_mode_duplicate(dev, mode);
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400287 if (!adjusted_mode) {
288 crtc->enabled = saved_enabled;
Ville Syrjälä6bfc56a2012-03-13 12:35:48 +0200289 return false;
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400290 }
Chris Wilson021a8452011-01-28 11:31:56 +0000291
Dave Airlief453ba02008-11-07 14:05:41 -0800292 saved_mode = crtc->mode;
Daniel Stone5a275282015-03-19 04:33:03 +0000293 saved_hwmode = crtc->hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800294 saved_x = crtc->x;
295 saved_y = crtc->y;
296
297 /* Update crtc values up front so the driver can rely on them for mode
298 * setting.
299 */
300 crtc->mode = *mode;
301 crtc->x = x;
302 crtc->y = y;
303
Dave Airlief453ba02008-11-07 14:05:41 -0800304 /* Pass our mode to the connectors and the CRTC to give them a chance to
305 * adjust it according to limitations or connector properties, and also
306 * a chance to reject the mode entirely.
307 */
308 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
309
310 if (encoder->crtc != crtc)
311 continue;
Sean Paul3b336ec2013-08-14 16:47:37 -0400312
Archit Taneja862e6862015-05-21 11:03:16 +0530313 ret = drm_bridge_mode_fixup(encoder->bridge,
314 mode, adjusted_mode);
315 if (!ret) {
316 DRM_DEBUG_KMS("Bridge fixup failed\n");
317 goto done;
Sean Paul3b336ec2013-08-14 16:47:37 -0400318 }
319
Dave Airlief453ba02008-11-07 14:05:41 -0800320 encoder_funcs = encoder->helper_private;
321 if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
322 adjusted_mode))) {
Adam Jackson836e53d2011-10-10 16:21:27 -0400323 DRM_DEBUG_KMS("Encoder fixup failed\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800324 goto done;
325 }
326 }
327
328 if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
Adam Jackson836e53d2011-10-10 16:21:27 -0400329 DRM_DEBUG_KMS("CRTC fixup failed\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800330 goto done;
331 }
Jerome Glisse94401062010-07-15 15:43:25 -0400332 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
Dave Airlief453ba02008-11-07 14:05:41 -0800333
Daniel Stone5a275282015-03-19 04:33:03 +0000334 crtc->hwmode = *adjusted_mode;
335
Dave Airlief453ba02008-11-07 14:05:41 -0800336 /* Prepare the encoders and CRTCs before setting the mode. */
337 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
338
339 if (encoder->crtc != crtc)
340 continue;
Sean Paul3b336ec2013-08-14 16:47:37 -0400341
Archit Taneja862e6862015-05-21 11:03:16 +0530342 drm_bridge_disable(encoder->bridge);
Sean Paul3b336ec2013-08-14 16:47:37 -0400343
Dave Airlief453ba02008-11-07 14:05:41 -0800344 encoder_funcs = encoder->helper_private;
345 /* Disable the encoders as the first thing we do. */
346 encoder_funcs->prepare(encoder);
Sean Paul3b336ec2013-08-14 16:47:37 -0400347
Archit Taneja862e6862015-05-21 11:03:16 +0530348 drm_bridge_post_disable(encoder->bridge);
Dave Airlief453ba02008-11-07 14:05:41 -0800349 }
350
Jesse Barnes7bec7562009-02-23 16:09:34 -0800351 drm_crtc_prepare_encoders(dev);
352
Dave Airlief453ba02008-11-07 14:05:41 -0800353 crtc_funcs->prepare(crtc);
354
355 /* Set up the DPLL and any encoders state that needs to adjust or depend
356 * on the DPLL.
357 */
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000358 ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
359 if (!ret)
360 goto done;
Dave Airlief453ba02008-11-07 14:05:41 -0800361
362 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
363
364 if (encoder->crtc != crtc)
365 continue;
366
Jerome Glisse94401062010-07-15 15:43:25 -0400367 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
Jani Nikula83a8cfd2014-06-03 14:56:22 +0300368 encoder->base.id, encoder->name,
Jerome Glisse94401062010-07-15 15:43:25 -0400369 mode->base.id, mode->name);
Dave Airlief453ba02008-11-07 14:05:41 -0800370 encoder_funcs = encoder->helper_private;
371 encoder_funcs->mode_set(encoder, mode, adjusted_mode);
Sean Paul3b336ec2013-08-14 16:47:37 -0400372
Archit Taneja862e6862015-05-21 11:03:16 +0530373 drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode);
Dave Airlief453ba02008-11-07 14:05:41 -0800374 }
375
376 /* Now enable the clocks, plane, pipe, and connectors that we set up. */
377 crtc_funcs->commit(crtc);
378
379 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
380
381 if (encoder->crtc != crtc)
382 continue;
383
Archit Taneja862e6862015-05-21 11:03:16 +0530384 drm_bridge_pre_enable(encoder->bridge);
Sean Paul3b336ec2013-08-14 16:47:37 -0400385
Dave Airlief453ba02008-11-07 14:05:41 -0800386 encoder_funcs = encoder->helper_private;
387 encoder_funcs->commit(encoder);
388
Archit Taneja862e6862015-05-21 11:03:16 +0530389 drm_bridge_enable(encoder->bridge);
Dave Airlief453ba02008-11-07 14:05:41 -0800390 }
391
Mario Kleiner27641c32010-10-23 04:20:23 +0200392 /* Calculate and store various constants which
393 * are later needed by vblank and swap-completion
394 * timestamping. They are derived from true hwmode.
395 */
Ville Syrjälä545cdd52013-10-26 17:16:30 +0300396 drm_calc_timestamping_constants(crtc, &crtc->hwmode);
Mario Kleiner27641c32010-10-23 04:20:23 +0200397
Dave Airlief453ba02008-11-07 14:05:41 -0800398 /* FIXME: add subpixel order */
399done:
Chris Wilson021a8452011-01-28 11:31:56 +0000400 drm_mode_destroy(dev, adjusted_mode);
Dave Airlief453ba02008-11-07 14:05:41 -0800401 if (!ret) {
Ilija Hadzic7e99acd2013-10-29 11:09:44 -0400402 crtc->enabled = saved_enabled;
Dave Airlief453ba02008-11-07 14:05:41 -0800403 crtc->mode = saved_mode;
Daniel Stone5a275282015-03-19 04:33:03 +0000404 crtc->hwmode = saved_hwmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800405 crtc->x = saved_x;
406 crtc->y = saved_y;
407 }
408
409 return ret;
410}
411EXPORT_SYMBOL(drm_crtc_helper_set_mode);
412
Thierry Redinga74591d2014-04-29 11:44:39 +0200413static void
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000414drm_crtc_helper_disable(struct drm_crtc *crtc)
415{
416 struct drm_device *dev = crtc->dev;
417 struct drm_connector *connector;
418 struct drm_encoder *encoder;
419
420 /* Decouple all encoders and their attached connectors from this crtc */
421 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
422 if (encoder->crtc != crtc)
423 continue;
424
425 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
426 if (connector->encoder != encoder)
427 continue;
428
429 connector->encoder = NULL;
Thierry Redinga6ad6232013-10-02 15:50:06 +0200430
431 /*
432 * drm_helper_disable_unused_functions() ought to be
433 * doing this, but since we've decoupled the encoder
434 * from the connector above, the required connection
435 * between them is henceforth no longer available.
436 */
437 connector->dpms = DRM_MODE_DPMS_OFF;
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000438 }
439 }
440
Daniel Vetterb182cc52014-03-20 14:26:34 +0100441 __drm_helper_disable_unused_functions(dev);
Chris Wilson6eebd6b2011-11-28 21:10:05 +0000442}
443
Dave Airlief453ba02008-11-07 14:05:41 -0800444/**
445 * drm_crtc_helper_set_config - set a new config from userspace
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100446 * @set: mode set configuration
Dave Airlief453ba02008-11-07 14:05:41 -0800447 *
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100448 * Setup a new configuration, provided by the upper layers (either an ioctl call
Masanari Iidae2278672014-02-18 22:54:36 +0900449 * from userspace or internally e.g. from the fbdev support code) in @set, and
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100450 * enable it. This is the main helper functions for drivers that implement
451 * kernel mode setting with the crtc helper functions and the assorted
452 * ->prepare(), ->modeset() and ->commit() helper callbacks.
Dave Airlief453ba02008-11-07 14:05:41 -0800453 *
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100454 * Returns:
455 * Returns 0 on success, negative errno numbers on failure.
Dave Airlief453ba02008-11-07 14:05:41 -0800456 */
457int drm_crtc_helper_set_config(struct drm_mode_set *set)
458{
459 struct drm_device *dev;
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400460 struct drm_crtc *new_crtc;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200461 struct drm_encoder *save_encoders, *new_encoder, *encoder;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100462 bool mode_changed = false; /* if true do a full mode set */
463 bool fb_changed = false; /* if true and !mode_changed just do a flip */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200464 struct drm_connector *save_connectors, *connector;
Dave Airlief453ba02008-11-07 14:05:41 -0800465 int count = 0, ro, fail = 0;
Jani Nikulabe26a662015-03-11 11:51:06 +0200466 const struct drm_crtc_helper_funcs *crtc_funcs;
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800467 struct drm_mode_set save_set;
Laurent Pinchart4a1b0712012-05-17 13:27:21 +0200468 int ret;
Keith Packardbf9dc102010-11-26 10:45:58 -0800469 int i;
Dave Airlief453ba02008-11-07 14:05:41 -0800470
Zhao Yakui58367ed2009-07-20 13:48:07 +0800471 DRM_DEBUG_KMS("\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800472
Daniel Vettere58de882013-06-15 00:13:11 +0200473 BUG_ON(!set);
474 BUG_ON(!set->crtc);
475 BUG_ON(!set->crtc->helper_private);
Dave Airlief453ba02008-11-07 14:05:41 -0800476
Daniel Vettere58de882013-06-15 00:13:11 +0200477 /* Enforce sane interface api - has been abused by the fb helper. */
478 BUG_ON(!set->mode && set->fb);
479 BUG_ON(set->fb && set->num_connectors == 0);
Dave Airlief453ba02008-11-07 14:05:41 -0800480
481 crtc_funcs = set->crtc->helper_private;
482
Chris Wilsonede3ff52011-01-31 11:16:33 +0000483 if (!set->mode)
484 set->fb = NULL;
485
Jerome Glisse94401062010-07-15 15:43:25 -0400486 if (set->fb) {
487 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
488 set->crtc->base.id, set->fb->base.id,
489 (int)set->num_connectors, set->x, set->y);
490 } else {
Chris Wilsonede3ff52011-01-31 11:16:33 +0000491 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
Thierry Redinga74591d2014-04-29 11:44:39 +0200492 drm_crtc_helper_disable(set->crtc);
493 return 0;
Jerome Glisse94401062010-07-15 15:43:25 -0400494 }
Dave Airlief453ba02008-11-07 14:05:41 -0800495
496 dev = set->crtc->dev;
497
Daniel Vetter62ff94a2014-01-23 22:18:47 +0100498 drm_warn_on_modeset_not_all_locked(dev);
499
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400500 /*
501 * Allocate space for the backup of all (non-pointer) encoder and
502 * connector data.
503 */
Maarten Maathuise67aae72009-08-27 10:18:29 +0200504 save_encoders = kzalloc(dev->mode_config.num_encoder *
505 sizeof(struct drm_encoder), GFP_KERNEL);
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400506 if (!save_encoders)
Dave Airlief453ba02008-11-07 14:05:41 -0800507 return -ENOMEM;
Dave Airlief453ba02008-11-07 14:05:41 -0800508
Maarten Maathuise67aae72009-08-27 10:18:29 +0200509 save_connectors = kzalloc(dev->mode_config.num_connector *
510 sizeof(struct drm_connector), GFP_KERNEL);
511 if (!save_connectors) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200512 kfree(save_encoders);
513 return -ENOMEM;
514 }
515
Ilija Hadzic02ee4e92013-10-29 11:09:46 -0400516 /*
517 * Copy data. Note that driver private data is not affected.
Maarten Maathuise67aae72009-08-27 10:18:29 +0200518 * Should anything bad happen only the expected state is
519 * restored, not the drivers personal bookkeeping.
520 */
521 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200522 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
523 save_encoders[count++] = *encoder;
524 }
525
526 count = 0;
527 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
528 save_connectors[count++] = *connector;
529 }
530
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800531 save_set.crtc = set->crtc;
532 save_set.mode = &set->crtc->mode;
533 save_set.x = set->crtc->x;
534 save_set.y = set->crtc->y;
Matt Roperf4510a22014-04-01 15:22:40 -0700535 save_set.fb = set->crtc->primary->fb;
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800536
Dave Airlief453ba02008-11-07 14:05:41 -0800537 /* We should be able to check here if the fb has the same properties
538 * and then just flip_or_move it */
Matt Roperf4510a22014-04-01 15:22:40 -0700539 if (set->crtc->primary->fb != set->fb) {
Jesse Barnes712531b2009-01-09 13:56:14 -0800540 /* If we have no fb then treat it as a full mode set */
Matt Roperf4510a22014-04-01 15:22:40 -0700541 if (set->crtc->primary->fb == NULL) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800542 DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800543 mode_changed = true;
Jakob Bornecrantz4cb72b12009-08-03 13:43:59 +0100544 } else if (set->fb == NULL) {
545 mode_changed = true;
Laurent Pinchartce83adf2013-04-22 01:38:47 +0200546 } else if (set->fb->pixel_format !=
Matt Roperf4510a22014-04-01 15:22:40 -0700547 set->crtc->primary->fb->pixel_format) {
Laurent Pinchartce83adf2013-04-22 01:38:47 +0200548 mode_changed = true;
Dave Airlie8dff4742010-02-11 14:28:58 +1000549 } else
Jesse Barnes712531b2009-01-09 13:56:14 -0800550 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800551 }
552
553 if (set->x != set->crtc->x || set->y != set->crtc->y)
Jesse Barnes712531b2009-01-09 13:56:14 -0800554 fb_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800555
556 if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800557 DRM_DEBUG_KMS("modes are different, full mode set\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800558 drm_mode_debug_printmodeline(&set->crtc->mode);
559 drm_mode_debug_printmodeline(set->mode);
Jesse Barnes712531b2009-01-09 13:56:14 -0800560 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800561 }
562
563 /* a) traverse passed in connector list and get encoders for them */
564 count = 0;
565 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Jani Nikulabe26a662015-03-11 11:51:06 +0200566 const struct drm_connector_helper_funcs *connector_funcs =
Dave Airlief453ba02008-11-07 14:05:41 -0800567 connector->helper_private;
Dave Airlief453ba02008-11-07 14:05:41 -0800568 new_encoder = connector->encoder;
569 for (ro = 0; ro < set->num_connectors; ro++) {
570 if (set->connectors[ro] == connector) {
571 new_encoder = connector_funcs->best_encoder(connector);
572 /* if we can't get an encoder for a connector
573 we are setting now - then fail */
574 if (new_encoder == NULL)
575 /* don't break so fail path works correct */
576 fail = 1;
Daniel Vetter25f397a2013-07-19 18:57:11 +0200577
578 if (connector->dpms != DRM_MODE_DPMS_ON) {
579 DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
580 mode_changed = true;
581 }
Daniel Vetter177cf922014-04-01 22:14:59 +0200582
583 break;
Dave Airlief453ba02008-11-07 14:05:41 -0800584 }
585 }
586
587 if (new_encoder != connector->encoder) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800588 DRM_DEBUG_KMS("encoder changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800589 mode_changed = true;
Maarten Maathuisff846ab2009-08-19 00:56:45 +0200590 /* If the encoder is reused for another connector, then
591 * the appropriate crtc will be set later.
592 */
Maarten Maathuisff6fdbe2009-09-01 03:39:04 +0200593 if (connector->encoder)
594 connector->encoder->crtc = NULL;
Dave Airlief453ba02008-11-07 14:05:41 -0800595 connector->encoder = new_encoder;
596 }
597 }
598
599 if (fail) {
600 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200601 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800602 }
603
604 count = 0;
605 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
606 if (!connector->encoder)
607 continue;
608
Dave Airlief453ba02008-11-07 14:05:41 -0800609 if (connector->encoder->crtc == set->crtc)
610 new_crtc = NULL;
611 else
612 new_crtc = connector->encoder->crtc;
613
614 for (ro = 0; ro < set->num_connectors; ro++) {
615 if (set->connectors[ro] == connector)
616 new_crtc = set->crtc;
617 }
Jesse Barnes7bec7562009-02-23 16:09:34 -0800618
619 /* Make sure the new CRTC will work with the encoder */
620 if (new_crtc &&
621 !drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
622 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200623 goto fail;
Jesse Barnes7bec7562009-02-23 16:09:34 -0800624 }
Dave Airlief453ba02008-11-07 14:05:41 -0800625 if (new_crtc != connector->encoder->crtc) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800626 DRM_DEBUG_KMS("crtc changed, full mode switch\n");
Jesse Barnes712531b2009-01-09 13:56:14 -0800627 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800628 connector->encoder->crtc = new_crtc;
629 }
Jerome Glisse94401062010-07-15 15:43:25 -0400630 if (new_crtc) {
631 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
Jani Nikula25933822014-06-03 14:56:20 +0300632 connector->base.id, connector->name,
Jerome Glisse94401062010-07-15 15:43:25 -0400633 new_crtc->base.id);
634 } else {
635 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
Jani Nikula25933822014-06-03 14:56:20 +0300636 connector->base.id, connector->name);
Jerome Glisse94401062010-07-15 15:43:25 -0400637 }
Dave Airlief453ba02008-11-07 14:05:41 -0800638 }
639
640 /* mode_set_base is not a required function */
Jesse Barnes712531b2009-01-09 13:56:14 -0800641 if (fb_changed && !crtc_funcs->mode_set_base)
642 mode_changed = true;
Dave Airlief453ba02008-11-07 14:05:41 -0800643
Jesse Barnes712531b2009-01-09 13:56:14 -0800644 if (mode_changed) {
Ilija Hadzic48b1f5d2013-10-29 11:09:45 -0400645 if (drm_helper_crtc_in_use(set->crtc)) {
Zhao Yakui58367ed2009-07-20 13:48:07 +0800646 DRM_DEBUG_KMS("attempting to set mode from"
647 " userspace\n");
Dave Airlief453ba02008-11-07 14:05:41 -0800648 drm_mode_debug_printmodeline(set->mode);
Matt Roperf4510a22014-04-01 15:22:40 -0700649 set->crtc->primary->fb = set->fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800650 if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500651 set->x, set->y,
Ilija Hadzicbec2eac2013-10-29 11:09:42 -0400652 save_set.fb)) {
Jerome Glisse94401062010-07-15 15:43:25 -0400653 DRM_ERROR("failed to set mode on [CRTC:%d]\n",
654 set->crtc->base.id);
Matt Roperf4510a22014-04-01 15:22:40 -0700655 set->crtc->primary->fb = save_set.fb;
Dave Airlief453ba02008-11-07 14:05:41 -0800656 ret = -EINVAL;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200657 goto fail;
Dave Airlief453ba02008-11-07 14:05:41 -0800658 }
Daniel Vetter25f397a2013-07-19 18:57:11 +0200659 DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
660 for (i = 0; i < set->num_connectors; i++) {
661 DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
Jani Nikula25933822014-06-03 14:56:20 +0300662 set->connectors[i]->name);
Daniel Vetter25f397a2013-07-19 18:57:11 +0200663 set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
664 }
Dave Airlief453ba02008-11-07 14:05:41 -0800665 }
Daniel Vetterb182cc52014-03-20 14:26:34 +0100666 __drm_helper_disable_unused_functions(dev);
Jesse Barnes712531b2009-01-09 13:56:14 -0800667 } else if (fb_changed) {
Ben Skeggs9b1596a2009-09-18 10:43:52 +1000668 set->crtc->x = set->x;
669 set->crtc->y = set->y;
Matt Roperf4510a22014-04-01 15:22:40 -0700670 set->crtc->primary->fb = set->fb;
Chris Wilson5c3b82e2009-02-11 13:25:09 +0000671 ret = crtc_funcs->mode_set_base(set->crtc,
Ilija Hadzicbec2eac2013-10-29 11:09:42 -0400672 set->x, set->y, save_set.fb);
Chris Wilson0ba41e42011-01-08 15:10:41 +0000673 if (ret != 0) {
Ilija Hadzicfbce4062013-10-29 11:09:43 -0400674 set->crtc->x = save_set.x;
675 set->crtc->y = save_set.y;
Matt Roperf4510a22014-04-01 15:22:40 -0700676 set->crtc->primary->fb = save_set.fb;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200677 goto fail;
Chris Wilson0ba41e42011-01-08 15:10:41 +0000678 }
Dave Airlief453ba02008-11-07 14:05:41 -0800679 }
680
Maarten Maathuise67aae72009-08-27 10:18:29 +0200681 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800682 kfree(save_encoders);
Dave Airlief453ba02008-11-07 14:05:41 -0800683 return 0;
684
Maarten Maathuise67aae72009-08-27 10:18:29 +0200685fail:
686 /* Restore all previous data. */
Dave Airlief453ba02008-11-07 14:05:41 -0800687 count = 0;
Maarten Maathuise67aae72009-08-27 10:18:29 +0200688 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
689 *encoder = save_encoders[count++];
Chris Wilsone62fb642009-02-11 16:39:21 +0000690 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200691
Dave Airlief453ba02008-11-07 14:05:41 -0800692 count = 0;
693 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
Maarten Maathuise67aae72009-08-27 10:18:29 +0200694 *connector = save_connectors[count++];
Dave Airlief453ba02008-11-07 14:05:41 -0800695 }
Maarten Maathuise67aae72009-08-27 10:18:29 +0200696
Jesse Barnesc5006cfe2011-11-07 10:39:57 -0800697 /* Try to restore the config */
698 if (mode_changed &&
699 !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
700 save_set.y, save_set.fb))
701 DRM_ERROR("failed to restore config after modeset failure\n");
702
Maarten Maathuise67aae72009-08-27 10:18:29 +0200703 kfree(save_connectors);
Dave Airlief453ba02008-11-07 14:05:41 -0800704 kfree(save_encoders);
705 return ret;
706}
707EXPORT_SYMBOL(drm_crtc_helper_set_config);
708
Keith Packardc9fb15f2009-05-30 20:42:28 -0700709static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
710{
711 int dpms = DRM_MODE_DPMS_OFF;
712 struct drm_connector *connector;
713 struct drm_device *dev = encoder->dev;
714
715 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
716 if (connector->encoder == encoder)
717 if (connector->dpms < dpms)
718 dpms = connector->dpms;
719 return dpms;
720}
721
Sean Paul3b336ec2013-08-14 16:47:37 -0400722/* Helper which handles bridge ordering around encoder dpms */
723static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode)
724{
725 struct drm_bridge *bridge = encoder->bridge;
Jani Nikulabe26a662015-03-11 11:51:06 +0200726 const struct drm_encoder_helper_funcs *encoder_funcs;
Sean Paul3b336ec2013-08-14 16:47:37 -0400727
Archit Taneja862e6862015-05-21 11:03:16 +0530728 if (mode == DRM_MODE_DPMS_ON)
729 drm_bridge_pre_enable(bridge);
730 else
731 drm_bridge_disable(bridge);
Sean Paul3b336ec2013-08-14 16:47:37 -0400732
733 encoder_funcs = encoder->helper_private;
734 if (encoder_funcs->dpms)
735 encoder_funcs->dpms(encoder, mode);
736
Archit Taneja862e6862015-05-21 11:03:16 +0530737 if (mode == DRM_MODE_DPMS_ON)
738 drm_bridge_enable(bridge);
739 else
740 drm_bridge_post_disable(bridge);
Sean Paul3b336ec2013-08-14 16:47:37 -0400741}
742
Keith Packardc9fb15f2009-05-30 20:42:28 -0700743static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
744{
745 int dpms = DRM_MODE_DPMS_OFF;
746 struct drm_connector *connector;
747 struct drm_device *dev = crtc->dev;
748
749 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
750 if (connector->encoder && connector->encoder->crtc == crtc)
751 if (connector->dpms < dpms)
752 dpms = connector->dpms;
753 return dpms;
754}
755
756/**
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100757 * drm_helper_connector_dpms() - connector dpms helper implementation
758 * @connector: affected connector
759 * @mode: DPMS mode
Keith Packardc9fb15f2009-05-30 20:42:28 -0700760 *
Daniel Vetter0d4ed4c2012-11-01 14:45:16 +0100761 * This is the main helper function provided by the crtc helper framework for
762 * implementing the DPMS connector attribute. It computes the new desired DPMS
763 * state for all encoders and crtcs in the output mesh and calls the ->dpms()
764 * callback provided by the driver appropriately.
Keith Packardc9fb15f2009-05-30 20:42:28 -0700765 */
766void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
767{
768 struct drm_encoder *encoder = connector->encoder;
769 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
Sean Paul3b336ec2013-08-14 16:47:37 -0400770 int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700771
772 if (mode == connector->dpms)
773 return;
774
775 old_dpms = connector->dpms;
776 connector->dpms = mode;
777
Sean Paul3b336ec2013-08-14 16:47:37 -0400778 if (encoder)
779 encoder_dpms = drm_helper_choose_encoder_dpms(encoder);
780
Keith Packardc9fb15f2009-05-30 20:42:28 -0700781 /* from off to on, do crtc then encoder */
782 if (mode < old_dpms) {
783 if (crtc) {
Jani Nikulabe26a662015-03-11 11:51:06 +0200784 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700785 if (crtc_funcs->dpms)
786 (*crtc_funcs->dpms) (crtc,
787 drm_helper_choose_crtc_dpms(crtc));
788 }
Sean Paul3b336ec2013-08-14 16:47:37 -0400789 if (encoder)
790 drm_helper_encoder_dpms(encoder, encoder_dpms);
Keith Packardc9fb15f2009-05-30 20:42:28 -0700791 }
792
793 /* from on to off, do encoder then crtc */
794 if (mode > old_dpms) {
Sean Paul3b336ec2013-08-14 16:47:37 -0400795 if (encoder)
796 drm_helper_encoder_dpms(encoder, encoder_dpms);
Keith Packardc9fb15f2009-05-30 20:42:28 -0700797 if (crtc) {
Jani Nikulabe26a662015-03-11 11:51:06 +0200798 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
Keith Packardc9fb15f2009-05-30 20:42:28 -0700799 if (crtc_funcs->dpms)
800 (*crtc_funcs->dpms) (crtc,
801 drm_helper_choose_crtc_dpms(crtc));
802 }
803 }
804
805 return;
806}
807EXPORT_SYMBOL(drm_helper_connector_dpms);
808
Daniel Vetter3fcc42e2014-01-23 22:58:26 +0100809/**
810 * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata
811 * @fb: drm_framebuffer object to fill out
812 * @mode_cmd: metadata from the userspace fb creation request
813 *
814 * This helper can be used in a drivers fb_create callback to pre-fill the fb's
815 * metadata fields.
816 */
Daniel Vetter9fd93782014-01-23 22:16:24 +0100817void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
818 struct drm_mode_fb_cmd2 *mode_cmd)
Dave Airlief453ba02008-11-07 14:05:41 -0800819{
Ville Syrjälä01f2c772011-12-20 00:06:49 +0200820 int i;
821
Dave Airlief453ba02008-11-07 14:05:41 -0800822 fb->width = mode_cmd->width;
823 fb->height = mode_cmd->height;
Ville Syrjälä01f2c772011-12-20 00:06:49 +0200824 for (i = 0; i < 4; i++) {
825 fb->pitches[i] = mode_cmd->pitches[i];
826 fb->offsets[i] = mode_cmd->offsets[i];
Rob Clarke3eb3252015-02-05 14:41:52 +0000827 fb->modifier[i] = mode_cmd->modifier[i];
Ville Syrjälä01f2c772011-12-20 00:06:49 +0200828 }
Dave Airlie248dbc22011-11-29 20:02:54 +0000829 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
Jesse Barnes308e5bc2011-11-14 14:51:28 -0800830 &fb->bits_per_pixel);
831 fb->pixel_format = mode_cmd->pixel_format;
Fabien DESSENNEd980b182014-07-01 14:40:42 +0200832 fb->flags = mode_cmd->flags;
Dave Airlief453ba02008-11-07 14:05:41 -0800833}
834EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
835
Daniel Vetteraa4cd912014-01-22 16:42:02 +0100836/**
837 * drm_helper_resume_force_mode - force-restore mode setting configuration
838 * @dev: drm_device which should be restored
839 *
840 * Drivers which use the mode setting helpers can use this function to
841 * force-restore the mode setting configuration e.g. on resume or when something
842 * else might have trampled over the hw state (like some overzealous old BIOSen
843 * tended to do).
Daniel Vetter00d762c2014-01-23 22:28:30 +0100844 *
845 * This helper doesn't provide a error return value since restoring the old
846 * config should never fail due to resource allocation issues since the driver
847 * has successfully set the restored configuration already. Hence this should
848 * boil down to the equivalent of a few dpms on calls, which also don't provide
849 * an error code.
850 *
851 * Drivers where simply restoring an old configuration again might fail (e.g.
852 * due to slight differences in allocating shared resources when the
853 * configuration is restored in a different order than when userspace set it up)
854 * need to use their own restore logic.
Daniel Vetteraa4cd912014-01-22 16:42:02 +0100855 */
Daniel Vetter00d762c2014-01-23 22:28:30 +0100856void drm_helper_resume_force_mode(struct drm_device *dev)
Dave Airlief453ba02008-11-07 14:05:41 -0800857{
858 struct drm_crtc *crtc;
David John89347bb2009-12-31 12:00:46 +0530859 struct drm_encoder *encoder;
Jani Nikulabe26a662015-03-11 11:51:06 +0200860 const struct drm_crtc_helper_funcs *crtc_funcs;
Daniel Vetter00d762c2014-01-23 22:28:30 +0100861 int encoder_dpms;
862 bool ret;
Dave Airlief453ba02008-11-07 14:05:41 -0800863
Dave Airlie3ea87852014-03-21 10:45:40 +1000864 drm_modeset_lock_all(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800865 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
866
867 if (!crtc->enabled)
868 continue;
869
Kristian Høgsberg3c4fdcf2008-12-17 22:14:46 -0500870 ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
Matt Roperf4510a22014-04-01 15:22:40 -0700871 crtc->x, crtc->y, crtc->primary->fb);
Dave Airlief453ba02008-11-07 14:05:41 -0800872
Daniel Vetter00d762c2014-01-23 22:28:30 +0100873 /* Restoring the old config should never fail! */
Dave Airlief453ba02008-11-07 14:05:41 -0800874 if (ret == false)
875 DRM_ERROR("failed to set mode on crtc %p\n", crtc);
David John89347bb2009-12-31 12:00:46 +0530876
877 /* Turn off outputs that were already powered off */
878 if (drm_helper_choose_crtc_dpms(crtc)) {
879 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
880
881 if(encoder->crtc != crtc)
882 continue;
883
Sean Paul3b336ec2013-08-14 16:47:37 -0400884 encoder_dpms = drm_helper_choose_encoder_dpms(
885 encoder);
886
887 drm_helper_encoder_dpms(encoder, encoder_dpms);
David John89347bb2009-12-31 12:00:46 +0530888 }
Chris Wilson817e6312010-08-06 15:03:31 +0100889
890 crtc_funcs = crtc->helper_private;
891 if (crtc_funcs->dpms)
892 (*crtc_funcs->dpms) (crtc,
893 drm_helper_choose_crtc_dpms(crtc));
David John89347bb2009-12-31 12:00:46 +0530894 }
Dave Airlief453ba02008-11-07 14:05:41 -0800895 }
Daniel Vetter00d762c2014-01-23 22:28:30 +0100896
Zhao Yakuiaf4fcb52009-07-08 14:13:13 +0800897 /* disable the unused connectors while restoring the modesetting */
Daniel Vetterb182cc52014-03-20 14:26:34 +0100898 __drm_helper_disable_unused_functions(dev);
Dave Airlie3ea87852014-03-21 10:45:40 +1000899 drm_modeset_unlock_all(dev);
Dave Airlief453ba02008-11-07 14:05:41 -0800900}
901EXPORT_SYMBOL(drm_helper_resume_force_mode);
Daniel Vetter2f324b42014-10-29 11:13:47 +0100902
903/**
904 * drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers
905 * @crtc: DRM CRTC
906 * @mode: DRM display mode which userspace requested
907 * @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks
908 * @x: x offset of the CRTC scanout area on the underlying framebuffer
909 * @y: y offset of the CRTC scanout area on the underlying framebuffer
910 * @old_fb: previous framebuffer
911 *
912 * This function implements a callback useable as the ->mode_set callback
913 * required by the crtc helpers. Besides the atomic plane helper functions for
914 * the primary plane the driver must also provide the ->mode_set_nofb callback
915 * to set up the crtc.
916 *
917 * This is a transitional helper useful for converting drivers to the atomic
918 * interfaces.
919 */
920int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
921 struct drm_display_mode *adjusted_mode, int x, int y,
922 struct drm_framebuffer *old_fb)
923{
924 struct drm_crtc_state *crtc_state;
Jani Nikulabe26a662015-03-11 11:51:06 +0200925 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
Daniel Vetter2f324b42014-10-29 11:13:47 +0100926 int ret;
927
928 if (crtc->funcs->atomic_duplicate_state)
929 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
Daniel Stone9f658b72015-05-22 13:34:45 +0100930 else {
Daniel Vetter2f324b42014-10-29 11:13:47 +0100931 crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL);
Daniel Stone9f658b72015-05-22 13:34:45 +0100932 if (!crtc_state)
933 return -ENOMEM;
934 if (crtc->state)
935 __drm_atomic_helper_crtc_duplicate_state(crtc, crtc_state);
936 else
937 crtc_state->crtc = crtc;
938 }
Daniel Vetter2f324b42014-10-29 11:13:47 +0100939
940 crtc_state->enable = true;
941 crtc_state->planes_changed = true;
Daniel Vetter623369e2014-09-16 17:50:47 +0200942 crtc_state->mode_changed = true;
Daniel Vetter2f324b42014-10-29 11:13:47 +0100943 drm_mode_copy(&crtc_state->mode, mode);
944 drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode);
945
946 if (crtc_funcs->atomic_check) {
947 ret = crtc_funcs->atomic_check(crtc, crtc_state);
Daniel Stone9f658b72015-05-22 13:34:45 +0100948 if (ret)
949 goto out;
Daniel Vetter2f324b42014-10-29 11:13:47 +0100950 }
951
952 swap(crtc->state, crtc_state);
953
954 crtc_funcs->mode_set_nofb(crtc);
955
Daniel Stone9f658b72015-05-22 13:34:45 +0100956 ret = drm_helper_crtc_mode_set_base(crtc, x, y, old_fb);
957
958out:
959 if (crtc->funcs->atomic_destroy_state)
960 crtc->funcs->atomic_destroy_state(crtc, crtc_state);
961 else {
962 __drm_atomic_helper_crtc_destroy_state(crtc, crtc_state);
963 kfree(crtc_state);
Daniel Vetter2f324b42014-10-29 11:13:47 +0100964 }
965
Daniel Stone9f658b72015-05-22 13:34:45 +0100966 return ret;
Daniel Vetter2f324b42014-10-29 11:13:47 +0100967}
968EXPORT_SYMBOL(drm_helper_crtc_mode_set);
969
970/**
971 * drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers
972 * @crtc: DRM CRTC
973 * @x: x offset of the CRTC scanout area on the underlying framebuffer
974 * @y: y offset of the CRTC scanout area on the underlying framebuffer
975 * @old_fb: previous framebuffer
976 *
977 * This function implements a callback useable as the ->mode_set_base used
978 * required by the crtc helpers. The driver must provide the atomic plane helper
979 * functions for the primary plane.
980 *
981 * This is a transitional helper useful for converting drivers to the atomic
982 * interfaces.
983 */
984int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
985 struct drm_framebuffer *old_fb)
986{
987 struct drm_plane_state *plane_state;
988 struct drm_plane *plane = crtc->primary;
989
990 if (plane->funcs->atomic_duplicate_state)
991 plane_state = plane->funcs->atomic_duplicate_state(plane);
992 else if (plane->state)
Daniel Vetter321ebf02014-11-04 22:57:27 +0100993 plane_state = drm_atomic_helper_plane_duplicate_state(plane);
Daniel Vetter2f324b42014-10-29 11:13:47 +0100994 else
995 plane_state = kzalloc(sizeof(*plane_state), GFP_KERNEL);
996 if (!plane_state)
997 return -ENOMEM;
Daniel Vetter07cc0ef2014-11-27 15:49:39 +0100998 plane_state->plane = plane;
Daniel Vetter2f324b42014-10-29 11:13:47 +0100999
1000 plane_state->crtc = crtc;
Daniel Vetter321ebf02014-11-04 22:57:27 +01001001 drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb);
Daniel Vetter2f324b42014-10-29 11:13:47 +01001002 plane_state->crtc_x = 0;
1003 plane_state->crtc_y = 0;
1004 plane_state->crtc_h = crtc->mode.vdisplay;
1005 plane_state->crtc_w = crtc->mode.hdisplay;
1006 plane_state->src_x = x << 16;
1007 plane_state->src_y = y << 16;
1008 plane_state->src_h = crtc->mode.vdisplay << 16;
1009 plane_state->src_w = crtc->mode.hdisplay << 16;
1010
1011 return drm_plane_helper_commit(plane, plane_state, old_fb);
1012}
1013EXPORT_SYMBOL(drm_helper_crtc_mode_set_base);