Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2006-2010 Intel Corporation |
| 3 | * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 6 | * copy of this software and associated documentation files (the "Software"), |
| 7 | * to deal in the Software without restriction, including without limitation |
| 8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 9 | * and/or sell copies of the Software, and to permit persons to whom the |
| 10 | * Software is furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice (including the next |
| 13 | * paragraph) shall be included in all copies or substantial portions of the |
| 14 | * Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 22 | * DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: |
| 25 | * Eric Anholt <eric@anholt.net> |
| 26 | * Dave Airlie <airlied@linux.ie> |
| 27 | * Jesse Barnes <jesse.barnes@intel.com> |
| 28 | * Chris Wilson <chris@chris-wilson.co.uk> |
| 29 | */ |
| 30 | |
Joe Perches | a70491c | 2012-03-18 13:00:11 -0700 | [diff] [blame] | 31 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 32 | |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 33 | #include <linux/moduleparam.h> |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 34 | #include "intel_drv.h" |
| 35 | |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 36 | #define PCI_LBPC 0xf4 /* legacy/combination backlight modes */ |
| 37 | |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 38 | void |
Ville Syrjälä | 4c6df4b | 2013-09-02 21:13:39 +0300 | [diff] [blame] | 39 | intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 40 | struct drm_display_mode *adjusted_mode) |
| 41 | { |
Ville Syrjälä | 4c6df4b | 2013-09-02 21:13:39 +0300 | [diff] [blame] | 42 | drm_mode_copy(adjusted_mode, fixed_mode); |
Imre Deak | a52690e | 2013-08-27 12:24:09 +0300 | [diff] [blame] | 43 | |
| 44 | drm_mode_set_crtcinfo(adjusted_mode, 0); |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | /* adjusted_mode has been preset to be the panel's fixed mode */ |
| 48 | void |
Jesse Barnes | b074cec | 2013-04-25 12:55:02 -0700 | [diff] [blame] | 49 | intel_pch_panel_fitting(struct intel_crtc *intel_crtc, |
| 50 | struct intel_crtc_config *pipe_config, |
| 51 | int fitting_mode) |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 52 | { |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 53 | struct drm_display_mode *adjusted_mode; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 54 | int x, y, width, height; |
| 55 | |
Jesse Barnes | b074cec | 2013-04-25 12:55:02 -0700 | [diff] [blame] | 56 | adjusted_mode = &pipe_config->adjusted_mode; |
| 57 | |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 58 | x = y = width = height = 0; |
| 59 | |
| 60 | /* Native modes don't need fitting */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 61 | if (adjusted_mode->hdisplay == pipe_config->pipe_src_w && |
| 62 | adjusted_mode->vdisplay == pipe_config->pipe_src_h) |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 63 | goto done; |
| 64 | |
| 65 | switch (fitting_mode) { |
| 66 | case DRM_MODE_SCALE_CENTER: |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 67 | width = pipe_config->pipe_src_w; |
| 68 | height = pipe_config->pipe_src_h; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 69 | x = (adjusted_mode->hdisplay - width + 1)/2; |
| 70 | y = (adjusted_mode->vdisplay - height + 1)/2; |
| 71 | break; |
| 72 | |
| 73 | case DRM_MODE_SCALE_ASPECT: |
| 74 | /* Scale but preserve the aspect ratio */ |
| 75 | { |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 76 | u32 scaled_width = adjusted_mode->hdisplay * pipe_config->pipe_src_h; |
| 77 | u32 scaled_height = pipe_config->pipe_src_w * adjusted_mode->vdisplay; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 78 | if (scaled_width > scaled_height) { /* pillar */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 79 | width = scaled_height / pipe_config->pipe_src_h; |
Adam Jackson | 302983e | 2011-07-13 16:32:32 -0400 | [diff] [blame] | 80 | if (width & 1) |
Akshay Joshi | 0206e35 | 2011-08-16 15:34:10 -0400 | [diff] [blame] | 81 | width++; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 82 | x = (adjusted_mode->hdisplay - width + 1) / 2; |
| 83 | y = 0; |
| 84 | height = adjusted_mode->vdisplay; |
| 85 | } else if (scaled_width < scaled_height) { /* letter */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 86 | height = scaled_width / pipe_config->pipe_src_w; |
Adam Jackson | 302983e | 2011-07-13 16:32:32 -0400 | [diff] [blame] | 87 | if (height & 1) |
| 88 | height++; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 89 | y = (adjusted_mode->vdisplay - height + 1) / 2; |
| 90 | x = 0; |
| 91 | width = adjusted_mode->hdisplay; |
| 92 | } else { |
| 93 | x = y = 0; |
| 94 | width = adjusted_mode->hdisplay; |
| 95 | height = adjusted_mode->vdisplay; |
| 96 | } |
| 97 | } |
| 98 | break; |
| 99 | |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 100 | case DRM_MODE_SCALE_FULLSCREEN: |
| 101 | x = y = 0; |
| 102 | width = adjusted_mode->hdisplay; |
| 103 | height = adjusted_mode->vdisplay; |
| 104 | break; |
Jesse Barnes | ab3e67f | 2013-04-25 12:55:03 -0700 | [diff] [blame] | 105 | |
| 106 | default: |
| 107 | WARN(1, "bad panel fit mode: %d\n", fitting_mode); |
| 108 | return; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | done: |
Jesse Barnes | b074cec | 2013-04-25 12:55:02 -0700 | [diff] [blame] | 112 | pipe_config->pch_pfit.pos = (x << 16) | y; |
| 113 | pipe_config->pch_pfit.size = (width << 16) | height; |
Chris Wilson | 1d8e1c7 | 2010-08-07 11:01:28 +0100 | [diff] [blame] | 114 | } |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 115 | |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 116 | static void |
| 117 | centre_horizontally(struct drm_display_mode *mode, |
| 118 | int width) |
| 119 | { |
| 120 | u32 border, sync_pos, blank_width, sync_width; |
| 121 | |
| 122 | /* keep the hsync and hblank widths constant */ |
| 123 | sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start; |
| 124 | blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start; |
| 125 | sync_pos = (blank_width - sync_width + 1) / 2; |
| 126 | |
| 127 | border = (mode->hdisplay - width + 1) / 2; |
| 128 | border += border & 1; /* make the border even */ |
| 129 | |
| 130 | mode->crtc_hdisplay = width; |
| 131 | mode->crtc_hblank_start = width + border; |
| 132 | mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width; |
| 133 | |
| 134 | mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos; |
| 135 | mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width; |
| 136 | } |
| 137 | |
| 138 | static void |
| 139 | centre_vertically(struct drm_display_mode *mode, |
| 140 | int height) |
| 141 | { |
| 142 | u32 border, sync_pos, blank_width, sync_width; |
| 143 | |
| 144 | /* keep the vsync and vblank widths constant */ |
| 145 | sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start; |
| 146 | blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start; |
| 147 | sync_pos = (blank_width - sync_width + 1) / 2; |
| 148 | |
| 149 | border = (mode->vdisplay - height + 1) / 2; |
| 150 | |
| 151 | mode->crtc_vdisplay = height; |
| 152 | mode->crtc_vblank_start = height + border; |
| 153 | mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width; |
| 154 | |
| 155 | mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos; |
| 156 | mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width; |
| 157 | } |
| 158 | |
| 159 | static inline u32 panel_fitter_scaling(u32 source, u32 target) |
| 160 | { |
| 161 | /* |
| 162 | * Floating point operation is not supported. So the FACTOR |
| 163 | * is defined, which can avoid the floating point computation |
| 164 | * when calculating the panel ratio. |
| 165 | */ |
| 166 | #define ACCURACY 12 |
| 167 | #define FACTOR (1 << ACCURACY) |
| 168 | u32 ratio = source * FACTOR / target; |
| 169 | return (FACTOR * ratio + FACTOR/2) / FACTOR; |
| 170 | } |
| 171 | |
| 172 | void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc, |
| 173 | struct intel_crtc_config *pipe_config, |
| 174 | int fitting_mode) |
| 175 | { |
| 176 | struct drm_device *dev = intel_crtc->base.dev; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 177 | u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0; |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 178 | struct drm_display_mode *adjusted_mode; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 179 | |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 180 | adjusted_mode = &pipe_config->adjusted_mode; |
| 181 | |
| 182 | /* Native modes don't need fitting */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 183 | if (adjusted_mode->hdisplay == pipe_config->pipe_src_w && |
| 184 | adjusted_mode->vdisplay == pipe_config->pipe_src_h) |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 185 | goto out; |
| 186 | |
| 187 | switch (fitting_mode) { |
| 188 | case DRM_MODE_SCALE_CENTER: |
| 189 | /* |
| 190 | * For centered modes, we have to calculate border widths & |
| 191 | * heights and modify the values programmed into the CRTC. |
| 192 | */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 193 | centre_horizontally(adjusted_mode, pipe_config->pipe_src_w); |
| 194 | centre_vertically(adjusted_mode, pipe_config->pipe_src_h); |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 195 | border = LVDS_BORDER_ENABLE; |
| 196 | break; |
| 197 | case DRM_MODE_SCALE_ASPECT: |
| 198 | /* Scale but preserve the aspect ratio */ |
| 199 | if (INTEL_INFO(dev)->gen >= 4) { |
| 200 | u32 scaled_width = adjusted_mode->hdisplay * |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 201 | pipe_config->pipe_src_h; |
| 202 | u32 scaled_height = pipe_config->pipe_src_w * |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 203 | adjusted_mode->vdisplay; |
| 204 | |
| 205 | /* 965+ is easy, it does everything in hw */ |
| 206 | if (scaled_width > scaled_height) |
| 207 | pfit_control |= PFIT_ENABLE | |
| 208 | PFIT_SCALING_PILLAR; |
| 209 | else if (scaled_width < scaled_height) |
| 210 | pfit_control |= PFIT_ENABLE | |
| 211 | PFIT_SCALING_LETTER; |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 212 | else if (adjusted_mode->hdisplay != pipe_config->pipe_src_w) |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 213 | pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO; |
| 214 | } else { |
| 215 | u32 scaled_width = adjusted_mode->hdisplay * |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 216 | pipe_config->pipe_src_h; |
| 217 | u32 scaled_height = pipe_config->pipe_src_w * |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 218 | adjusted_mode->vdisplay; |
| 219 | /* |
| 220 | * For earlier chips we have to calculate the scaling |
| 221 | * ratio by hand and program it into the |
| 222 | * PFIT_PGM_RATIO register |
| 223 | */ |
| 224 | if (scaled_width > scaled_height) { /* pillar */ |
| 225 | centre_horizontally(adjusted_mode, |
| 226 | scaled_height / |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 227 | pipe_config->pipe_src_h); |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 228 | |
| 229 | border = LVDS_BORDER_ENABLE; |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 230 | if (pipe_config->pipe_src_h != adjusted_mode->vdisplay) { |
| 231 | u32 bits = panel_fitter_scaling(pipe_config->pipe_src_h, adjusted_mode->vdisplay); |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 232 | pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | |
| 233 | bits << PFIT_VERT_SCALE_SHIFT); |
| 234 | pfit_control |= (PFIT_ENABLE | |
| 235 | VERT_INTERP_BILINEAR | |
| 236 | HORIZ_INTERP_BILINEAR); |
| 237 | } |
| 238 | } else if (scaled_width < scaled_height) { /* letter */ |
| 239 | centre_vertically(adjusted_mode, |
| 240 | scaled_width / |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 241 | pipe_config->pipe_src_w); |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 242 | |
| 243 | border = LVDS_BORDER_ENABLE; |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 244 | if (pipe_config->pipe_src_w != adjusted_mode->hdisplay) { |
| 245 | u32 bits = panel_fitter_scaling(pipe_config->pipe_src_w, adjusted_mode->hdisplay); |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 246 | pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | |
| 247 | bits << PFIT_VERT_SCALE_SHIFT); |
| 248 | pfit_control |= (PFIT_ENABLE | |
| 249 | VERT_INTERP_BILINEAR | |
| 250 | HORIZ_INTERP_BILINEAR); |
| 251 | } |
| 252 | } else { |
| 253 | /* Aspects match, Let hw scale both directions */ |
| 254 | pfit_control |= (PFIT_ENABLE | |
| 255 | VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | |
| 256 | VERT_INTERP_BILINEAR | |
| 257 | HORIZ_INTERP_BILINEAR); |
| 258 | } |
| 259 | } |
| 260 | break; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 261 | case DRM_MODE_SCALE_FULLSCREEN: |
| 262 | /* |
| 263 | * Full scaling, even if it changes the aspect ratio. |
| 264 | * Fortunately this is all done for us in hw. |
| 265 | */ |
Ville Syrjälä | 37327ab | 2013-09-04 18:25:28 +0300 | [diff] [blame^] | 266 | if (pipe_config->pipe_src_h != adjusted_mode->vdisplay || |
| 267 | pipe_config->pipe_src_w != adjusted_mode->hdisplay) { |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 268 | pfit_control |= PFIT_ENABLE; |
| 269 | if (INTEL_INFO(dev)->gen >= 4) |
| 270 | pfit_control |= PFIT_SCALING_AUTO; |
| 271 | else |
| 272 | pfit_control |= (VERT_AUTO_SCALE | |
| 273 | VERT_INTERP_BILINEAR | |
| 274 | HORIZ_AUTO_SCALE | |
| 275 | HORIZ_INTERP_BILINEAR); |
| 276 | } |
| 277 | break; |
Jesse Barnes | ab3e67f | 2013-04-25 12:55:03 -0700 | [diff] [blame] | 278 | default: |
| 279 | WARN(1, "bad panel fit mode: %d\n", fitting_mode); |
| 280 | return; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | /* 965+ wants fuzzy fitting */ |
| 284 | /* FIXME: handle multiple panels by failing gracefully */ |
| 285 | if (INTEL_INFO(dev)->gen >= 4) |
| 286 | pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) | |
| 287 | PFIT_FILTER_FUZZY); |
| 288 | |
| 289 | out: |
| 290 | if ((pfit_control & PFIT_ENABLE) == 0) { |
| 291 | pfit_control = 0; |
| 292 | pfit_pgm_ratios = 0; |
| 293 | } |
| 294 | |
| 295 | /* Make sure pre-965 set dither correctly for 18bpp panels. */ |
| 296 | if (INTEL_INFO(dev)->gen < 4 && pipe_config->pipe_bpp == 18) |
| 297 | pfit_control |= PANEL_8TO6_DITHER_ENABLE; |
| 298 | |
Daniel Vetter | 2deefda | 2013-04-25 22:52:17 +0200 | [diff] [blame] | 299 | pipe_config->gmch_pfit.control = pfit_control; |
| 300 | pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios; |
Daniel Vetter | 68fc874 | 2013-04-25 22:52:16 +0200 | [diff] [blame] | 301 | pipe_config->gmch_pfit.lvds_border_bits = border; |
Jesse Barnes | 2dd2455 | 2013-04-25 12:55:01 -0700 | [diff] [blame] | 302 | } |
| 303 | |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 304 | static int is_backlight_combination_mode(struct drm_device *dev) |
| 305 | { |
| 306 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 307 | |
| 308 | if (INTEL_INFO(dev)->gen >= 4) |
| 309 | return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE; |
| 310 | |
| 311 | if (IS_GEN2(dev)) |
| 312 | return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE; |
| 313 | |
| 314 | return 0; |
| 315 | } |
| 316 | |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 317 | /* XXX: query mode clock or hardware clock and program max PWM appropriately |
| 318 | * when it's 0. |
| 319 | */ |
Jani Nikula | bfd7590 | 2012-12-04 16:36:28 +0200 | [diff] [blame] | 320 | static u32 i915_read_blc_pwm_ctl(struct drm_device *dev) |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 321 | { |
Jani Nikula | bfd7590 | 2012-12-04 16:36:28 +0200 | [diff] [blame] | 322 | struct drm_i915_private *dev_priv = dev->dev_private; |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 323 | u32 val; |
| 324 | |
Ville Syrjälä | df0a679 | 2013-05-22 11:36:40 +0300 | [diff] [blame] | 325 | WARN_ON_SMP(!spin_is_locked(&dev_priv->backlight.lock)); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 326 | |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 327 | /* Restore the CTL value if it lost, e.g. GPU reset */ |
| 328 | |
| 329 | if (HAS_PCH_SPLIT(dev_priv->dev)) { |
| 330 | val = I915_READ(BLC_PWM_PCH_CTL2); |
Daniel Vetter | f4c956a | 2012-11-02 19:55:02 +0100 | [diff] [blame] | 331 | if (dev_priv->regfile.saveBLC_PWM_CTL2 == 0) { |
| 332 | dev_priv->regfile.saveBLC_PWM_CTL2 = val; |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 333 | } else if (val == 0) { |
Daniel Vetter | f4c956a | 2012-11-02 19:55:02 +0100 | [diff] [blame] | 334 | val = dev_priv->regfile.saveBLC_PWM_CTL2; |
Jani Nikula | bfd7590 | 2012-12-04 16:36:28 +0200 | [diff] [blame] | 335 | I915_WRITE(BLC_PWM_PCH_CTL2, val); |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 336 | } |
| 337 | } else { |
| 338 | val = I915_READ(BLC_PWM_CTL); |
Daniel Vetter | f4c956a | 2012-11-02 19:55:02 +0100 | [diff] [blame] | 339 | if (dev_priv->regfile.saveBLC_PWM_CTL == 0) { |
| 340 | dev_priv->regfile.saveBLC_PWM_CTL = val; |
Jani Nikula | bfd7590 | 2012-12-04 16:36:28 +0200 | [diff] [blame] | 341 | if (INTEL_INFO(dev)->gen >= 4) |
| 342 | dev_priv->regfile.saveBLC_PWM_CTL2 = |
| 343 | I915_READ(BLC_PWM_CTL2); |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 344 | } else if (val == 0) { |
Daniel Vetter | f4c956a | 2012-11-02 19:55:02 +0100 | [diff] [blame] | 345 | val = dev_priv->regfile.saveBLC_PWM_CTL; |
Jani Nikula | bfd7590 | 2012-12-04 16:36:28 +0200 | [diff] [blame] | 346 | I915_WRITE(BLC_PWM_CTL, val); |
| 347 | if (INTEL_INFO(dev)->gen >= 4) |
| 348 | I915_WRITE(BLC_PWM_CTL2, |
| 349 | dev_priv->regfile.saveBLC_PWM_CTL2); |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 350 | } |
| 351 | } |
| 352 | |
| 353 | return val; |
| 354 | } |
| 355 | |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 356 | static u32 intel_panel_get_max_backlight(struct drm_device *dev) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 357 | { |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 358 | u32 max; |
| 359 | |
Jani Nikula | bfd7590 | 2012-12-04 16:36:28 +0200 | [diff] [blame] | 360 | max = i915_read_blc_pwm_ctl(dev); |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 361 | |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 362 | if (HAS_PCH_SPLIT(dev)) { |
Chris Wilson | 0b0b053 | 2010-11-23 09:45:50 +0000 | [diff] [blame] | 363 | max >>= 16; |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 364 | } else { |
Keith Packard | ca88479 | 2011-11-18 11:09:24 -0800 | [diff] [blame] | 365 | if (INTEL_INFO(dev)->gen < 4) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 366 | max >>= 17; |
Keith Packard | ca88479 | 2011-11-18 11:09:24 -0800 | [diff] [blame] | 367 | else |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 368 | max >>= 16; |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 369 | |
| 370 | if (is_backlight_combination_mode(dev)) |
| 371 | max *= 0xff; |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 372 | } |
| 373 | |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 374 | DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max); |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 375 | |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 376 | return max; |
| 377 | } |
| 378 | |
Carsten Emde | 4dca20e | 2012-03-15 15:56:26 +0100 | [diff] [blame] | 379 | static int i915_panel_invert_brightness; |
| 380 | MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness " |
| 381 | "(-1 force normal, 0 machine defaults, 1 force inversion), please " |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 382 | "report PCI device ID, subsystem vendor and subsystem device ID " |
| 383 | "to dri-devel@lists.freedesktop.org, if your machine needs it. " |
| 384 | "It will then be included in an upcoming module version."); |
Carsten Emde | 4dca20e | 2012-03-15 15:56:26 +0100 | [diff] [blame] | 385 | module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600); |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 386 | static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val) |
| 387 | { |
Carsten Emde | 4dca20e | 2012-03-15 15:56:26 +0100 | [diff] [blame] | 388 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 389 | |
| 390 | if (i915_panel_invert_brightness < 0) |
| 391 | return val; |
| 392 | |
| 393 | if (i915_panel_invert_brightness > 0 || |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 394 | dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { |
| 395 | u32 max = intel_panel_get_max_backlight(dev); |
| 396 | if (max) |
| 397 | return max - val; |
| 398 | } |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 399 | |
| 400 | return val; |
| 401 | } |
| 402 | |
Stéphane Marchesin | faea35d | 2012-07-30 13:51:38 -0700 | [diff] [blame] | 403 | static u32 intel_panel_get_backlight(struct drm_device *dev) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 404 | { |
| 405 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 406 | u32 val; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 407 | unsigned long flags; |
| 408 | |
| 409 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 410 | |
| 411 | if (HAS_PCH_SPLIT(dev)) { |
| 412 | val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
| 413 | } else { |
| 414 | val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; |
Keith Packard | ca88479 | 2011-11-18 11:09:24 -0800 | [diff] [blame] | 415 | if (INTEL_INFO(dev)->gen < 4) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 416 | val >>= 1; |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 417 | |
Akshay Joshi | 0206e35 | 2011-08-16 15:34:10 -0400 | [diff] [blame] | 418 | if (is_backlight_combination_mode(dev)) { |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 419 | u8 lbpc; |
| 420 | |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 421 | pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc); |
| 422 | val *= lbpc; |
| 423 | } |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 424 | } |
| 425 | |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 426 | val = intel_panel_compute_brightness(dev, val); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 427 | |
| 428 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); |
| 429 | |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 430 | DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val); |
| 431 | return val; |
| 432 | } |
| 433 | |
| 434 | static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level) |
| 435 | { |
| 436 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 437 | u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; |
| 438 | I915_WRITE(BLC_PWM_CPU_CTL, val | level); |
| 439 | } |
| 440 | |
Takashi Iwai | f52c619 | 2011-10-14 11:45:40 +0200 | [diff] [blame] | 441 | static void intel_panel_actually_set_backlight(struct drm_device *dev, u32 level) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 442 | { |
| 443 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 444 | u32 tmp; |
| 445 | |
| 446 | DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level); |
Carsten Emde | 7bd9090 | 2012-03-15 15:56:25 +0100 | [diff] [blame] | 447 | level = intel_panel_compute_brightness(dev, level); |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 448 | |
| 449 | if (HAS_PCH_SPLIT(dev)) |
| 450 | return intel_pch_panel_set_backlight(dev, level); |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 451 | |
Akshay Joshi | 0206e35 | 2011-08-16 15:34:10 -0400 | [diff] [blame] | 452 | if (is_backlight_combination_mode(dev)) { |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 453 | u32 max = intel_panel_get_max_backlight(dev); |
| 454 | u8 lbpc; |
| 455 | |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 456 | /* we're screwed, but keep behaviour backwards compatible */ |
| 457 | if (!max) |
| 458 | max = 1; |
| 459 | |
Takashi Iwai | ba3820a | 2011-03-10 14:02:12 +0100 | [diff] [blame] | 460 | lbpc = level * 0xfe / max + 1; |
| 461 | level /= lbpc; |
| 462 | pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc); |
| 463 | } |
| 464 | |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 465 | tmp = I915_READ(BLC_PWM_CTL); |
Daniel Vetter | a726915 | 2012-11-20 14:50:08 +0100 | [diff] [blame] | 466 | if (INTEL_INFO(dev)->gen < 4) |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 467 | level <<= 1; |
Keith Packard | ca88479 | 2011-11-18 11:09:24 -0800 | [diff] [blame] | 468 | tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK; |
Chris Wilson | a957355 | 2010-08-22 13:18:16 +0100 | [diff] [blame] | 469 | I915_WRITE(BLC_PWM_CTL, tmp | level); |
| 470 | } |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 471 | |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 472 | /* set backlight brightness to level in range [0..max] */ |
| 473 | void intel_panel_set_backlight(struct drm_device *dev, u32 level, u32 max) |
Takashi Iwai | f52c619 | 2011-10-14 11:45:40 +0200 | [diff] [blame] | 474 | { |
| 475 | struct drm_i915_private *dev_priv = dev->dev_private; |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 476 | u32 freq; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 477 | unsigned long flags; |
| 478 | |
| 479 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 480 | |
| 481 | freq = intel_panel_get_max_backlight(dev); |
| 482 | if (!freq) { |
| 483 | /* we are screwed, bail out */ |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 484 | goto out; |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 485 | } |
| 486 | |
Aaron Lu | 22505b8 | 2013-08-02 09:16:03 +0800 | [diff] [blame] | 487 | /* scale to hardware, but be careful to not overflow */ |
| 488 | if (freq < max) |
| 489 | level = level * freq / max; |
| 490 | else |
| 491 | level = freq / max * level; |
Takashi Iwai | f52c619 | 2011-10-14 11:45:40 +0200 | [diff] [blame] | 492 | |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 493 | dev_priv->backlight.level = level; |
| 494 | if (dev_priv->backlight.device) |
| 495 | dev_priv->backlight.device->props.brightness = level; |
Jani Nikula | b6b3ba5 | 2013-03-12 11:44:15 +0200 | [diff] [blame] | 496 | |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 497 | if (dev_priv->backlight.enabled) |
Takashi Iwai | f52c619 | 2011-10-14 11:45:40 +0200 | [diff] [blame] | 498 | intel_panel_actually_set_backlight(dev, level); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 499 | out: |
| 500 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); |
Takashi Iwai | f52c619 | 2011-10-14 11:45:40 +0200 | [diff] [blame] | 501 | } |
| 502 | |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 503 | void intel_panel_disable_backlight(struct drm_device *dev) |
| 504 | { |
| 505 | struct drm_i915_private *dev_priv = dev->dev_private; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 506 | unsigned long flags; |
| 507 | |
Jani Nikula | 3f57757 | 2013-07-25 14:31:30 +0300 | [diff] [blame] | 508 | /* |
| 509 | * Do not disable backlight on the vgaswitcheroo path. When switching |
| 510 | * away from i915, the other client may depend on i915 to handle the |
| 511 | * backlight. This will leave the backlight on unnecessarily when |
| 512 | * another client is not activated. |
| 513 | */ |
| 514 | if (dev->switch_power_state == DRM_SWITCH_POWER_CHANGING) { |
| 515 | DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n"); |
| 516 | return; |
| 517 | } |
| 518 | |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 519 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 520 | |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 521 | dev_priv->backlight.enabled = false; |
Takashi Iwai | f52c619 | 2011-10-14 11:45:40 +0200 | [diff] [blame] | 522 | intel_panel_actually_set_backlight(dev, 0); |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 523 | |
| 524 | if (INTEL_INFO(dev)->gen >= 4) { |
Paulo Zanoni | a4f32fc | 2012-07-14 11:57:12 -0300 | [diff] [blame] | 525 | uint32_t reg, tmp; |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 526 | |
| 527 | reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2; |
| 528 | |
| 529 | I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE); |
Paulo Zanoni | a4f32fc | 2012-07-14 11:57:12 -0300 | [diff] [blame] | 530 | |
| 531 | if (HAS_PCH_SPLIT(dev)) { |
| 532 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
| 533 | tmp &= ~BLM_PCH_PWM_ENABLE; |
| 534 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); |
| 535 | } |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 536 | } |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 537 | |
| 538 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 539 | } |
| 540 | |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 541 | void intel_panel_enable_backlight(struct drm_device *dev, |
| 542 | enum pipe pipe) |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 543 | { |
| 544 | struct drm_i915_private *dev_priv = dev->dev_private; |
Jani Nikula | 35ffda4 | 2013-04-25 16:49:25 +0300 | [diff] [blame] | 545 | enum transcoder cpu_transcoder = |
| 546 | intel_pipe_to_cpu_transcoder(dev_priv, pipe); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 547 | unsigned long flags; |
| 548 | |
| 549 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 550 | |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 551 | if (dev_priv->backlight.level == 0) { |
| 552 | dev_priv->backlight.level = intel_panel_get_max_backlight(dev); |
| 553 | if (dev_priv->backlight.device) |
| 554 | dev_priv->backlight.device->props.brightness = |
| 555 | dev_priv->backlight.level; |
Jani Nikula | b6b3ba5 | 2013-03-12 11:44:15 +0200 | [diff] [blame] | 556 | } |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 557 | |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 558 | if (INTEL_INFO(dev)->gen >= 4) { |
| 559 | uint32_t reg, tmp; |
| 560 | |
| 561 | reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2; |
| 562 | |
| 563 | |
| 564 | tmp = I915_READ(reg); |
| 565 | |
| 566 | /* Note that this can also get called through dpms changes. And |
| 567 | * we don't track the backlight dpms state, hence check whether |
| 568 | * we have to do anything first. */ |
| 569 | if (tmp & BLM_PWM_ENABLE) |
Takashi Iwai | 770c123 | 2012-08-11 08:56:42 +0200 | [diff] [blame] | 570 | goto set_level; |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 571 | |
Ben Widawsky | 7eb552a | 2013-03-13 14:05:41 -0700 | [diff] [blame] | 572 | if (INTEL_INFO(dev)->num_pipes == 3) |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 573 | tmp &= ~BLM_PIPE_SELECT_IVB; |
| 574 | else |
| 575 | tmp &= ~BLM_PIPE_SELECT; |
| 576 | |
Jani Nikula | 35ffda4 | 2013-04-25 16:49:25 +0300 | [diff] [blame] | 577 | if (cpu_transcoder == TRANSCODER_EDP) |
| 578 | tmp |= BLM_TRANSCODER_EDP; |
| 579 | else |
| 580 | tmp |= BLM_PIPE(cpu_transcoder); |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 581 | tmp &= ~BLM_PWM_ENABLE; |
| 582 | |
| 583 | I915_WRITE(reg, tmp); |
| 584 | POSTING_READ(reg); |
| 585 | I915_WRITE(reg, tmp | BLM_PWM_ENABLE); |
Paulo Zanoni | a4f32fc | 2012-07-14 11:57:12 -0300 | [diff] [blame] | 586 | |
Kamal Mostafa | e85843b | 2013-07-19 15:02:01 -0700 | [diff] [blame] | 587 | if (HAS_PCH_SPLIT(dev) && |
| 588 | !(dev_priv->quirks & QUIRK_NO_PCH_PWM_ENABLE)) { |
Paulo Zanoni | a4f32fc | 2012-07-14 11:57:12 -0300 | [diff] [blame] | 589 | tmp = I915_READ(BLC_PWM_PCH_CTL1); |
| 590 | tmp |= BLM_PCH_PWM_ENABLE; |
| 591 | tmp &= ~BLM_PCH_OVERRIDE_ENABLE; |
| 592 | I915_WRITE(BLC_PWM_PCH_CTL1, tmp); |
| 593 | } |
Daniel Vetter | 24ded20 | 2012-06-05 12:14:54 +0200 | [diff] [blame] | 594 | } |
Takashi Iwai | 770c123 | 2012-08-11 08:56:42 +0200 | [diff] [blame] | 595 | |
| 596 | set_level: |
Daniel Vetter | b128937 | 2013-03-22 15:44:46 +0100 | [diff] [blame] | 597 | /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1. |
| 598 | * BLC_PWM_CPU_CTL may be cleared to zero automatically when these |
| 599 | * registers are set. |
Takashi Iwai | 770c123 | 2012-08-11 08:56:42 +0200 | [diff] [blame] | 600 | */ |
Daniel Vetter | ecb135a | 2013-04-03 11:25:32 +0200 | [diff] [blame] | 601 | dev_priv->backlight.enabled = true; |
| 602 | intel_panel_actually_set_backlight(dev, dev_priv->backlight.level); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 603 | |
| 604 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 605 | } |
| 606 | |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 607 | static void intel_panel_init_backlight(struct drm_device *dev) |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 608 | { |
| 609 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 610 | |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 611 | dev_priv->backlight.level = intel_panel_get_backlight(dev); |
| 612 | dev_priv->backlight.enabled = dev_priv->backlight.level != 0; |
Chris Wilson | 47356eb | 2011-01-11 17:06:04 +0000 | [diff] [blame] | 613 | } |
Chris Wilson | fe16d94 | 2011-02-12 10:29:38 +0000 | [diff] [blame] | 614 | |
| 615 | enum drm_connector_status |
| 616 | intel_panel_detect(struct drm_device *dev) |
| 617 | { |
| 618 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 619 | |
| 620 | /* Assume that the BIOS does not lie through the OpRegion... */ |
Daniel Vetter | a726915 | 2012-11-20 14:50:08 +0100 | [diff] [blame] | 621 | if (!i915_panel_ignore_lid && dev_priv->opregion.lid_state) { |
Chris Wilson | fe16d94 | 2011-02-12 10:29:38 +0000 | [diff] [blame] | 622 | return ioread32(dev_priv->opregion.lid_state) & 0x1 ? |
| 623 | connector_status_connected : |
| 624 | connector_status_disconnected; |
Daniel Vetter | a726915 | 2012-11-20 14:50:08 +0100 | [diff] [blame] | 625 | } |
Chris Wilson | fe16d94 | 2011-02-12 10:29:38 +0000 | [diff] [blame] | 626 | |
Daniel Vetter | a726915 | 2012-11-20 14:50:08 +0100 | [diff] [blame] | 627 | switch (i915_panel_ignore_lid) { |
| 628 | case -2: |
| 629 | return connector_status_connected; |
| 630 | case -1: |
| 631 | return connector_status_disconnected; |
| 632 | default: |
| 633 | return connector_status_unknown; |
| 634 | } |
Chris Wilson | fe16d94 | 2011-02-12 10:29:38 +0000 | [diff] [blame] | 635 | } |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 636 | |
| 637 | #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE |
| 638 | static int intel_panel_update_status(struct backlight_device *bd) |
| 639 | { |
| 640 | struct drm_device *dev = bl_get_data(bd); |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 641 | intel_panel_set_backlight(dev, bd->props.brightness, |
| 642 | bd->props.max_brightness); |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 643 | return 0; |
| 644 | } |
| 645 | |
| 646 | static int intel_panel_get_brightness(struct backlight_device *bd) |
| 647 | { |
| 648 | struct drm_device *dev = bl_get_data(bd); |
Jani Nikula | 7c23396 | 2013-03-12 11:44:16 +0200 | [diff] [blame] | 649 | return intel_panel_get_backlight(dev); |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 650 | } |
| 651 | |
| 652 | static const struct backlight_ops intel_panel_bl_ops = { |
| 653 | .update_status = intel_panel_update_status, |
| 654 | .get_brightness = intel_panel_get_brightness, |
| 655 | }; |
| 656 | |
Jani Nikula | 0657b6b | 2012-10-19 14:51:46 +0300 | [diff] [blame] | 657 | int intel_panel_setup_backlight(struct drm_connector *connector) |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 658 | { |
Jani Nikula | 0657b6b | 2012-10-19 14:51:46 +0300 | [diff] [blame] | 659 | struct drm_device *dev = connector->dev; |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 660 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 661 | struct backlight_properties props; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 662 | unsigned long flags; |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 663 | |
| 664 | intel_panel_init_backlight(dev); |
| 665 | |
Jani Nikula | dc652f9 | 2013-04-12 15:18:38 +0300 | [diff] [blame] | 666 | if (WARN_ON(dev_priv->backlight.device)) |
| 667 | return -ENODEV; |
| 668 | |
Corentin Chary | af437cf | 2012-05-22 10:29:46 +0100 | [diff] [blame] | 669 | memset(&props, 0, sizeof(props)); |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 670 | props.type = BACKLIGHT_RAW; |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 671 | props.brightness = dev_priv->backlight.level; |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 672 | |
| 673 | spin_lock_irqsave(&dev_priv->backlight.lock, flags); |
Jani Nikula | d654063 | 2013-04-12 15:18:36 +0300 | [diff] [blame] | 674 | props.max_brightness = intel_panel_get_max_backlight(dev); |
Jani Nikula | 8ba2d18 | 2013-04-12 15:18:37 +0300 | [diff] [blame] | 675 | spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); |
| 676 | |
Jani Nikula | 28dcc2d | 2012-09-03 16:25:12 +0300 | [diff] [blame] | 677 | if (props.max_brightness == 0) { |
Jani Nikula | e86b618 | 2012-10-25 10:57:38 +0300 | [diff] [blame] | 678 | DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n"); |
Jani Nikula | 28dcc2d | 2012-09-03 16:25:12 +0300 | [diff] [blame] | 679 | return -ENODEV; |
| 680 | } |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 681 | dev_priv->backlight.device = |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 682 | backlight_device_register("intel_backlight", |
| 683 | &connector->kdev, dev, |
| 684 | &intel_panel_bl_ops, &props); |
| 685 | |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 686 | if (IS_ERR(dev_priv->backlight.device)) { |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 687 | DRM_ERROR("Failed to register backlight: %ld\n", |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 688 | PTR_ERR(dev_priv->backlight.device)); |
| 689 | dev_priv->backlight.device = NULL; |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 690 | return -ENODEV; |
| 691 | } |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | void intel_panel_destroy_backlight(struct drm_device *dev) |
| 696 | { |
| 697 | struct drm_i915_private *dev_priv = dev->dev_private; |
Jani Nikula | dc652f9 | 2013-04-12 15:18:38 +0300 | [diff] [blame] | 698 | if (dev_priv->backlight.device) { |
Jani Nikula | 31ad8ec | 2013-04-02 15:48:09 +0300 | [diff] [blame] | 699 | backlight_device_unregister(dev_priv->backlight.device); |
Jani Nikula | dc652f9 | 2013-04-12 15:18:38 +0300 | [diff] [blame] | 700 | dev_priv->backlight.device = NULL; |
| 701 | } |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 702 | } |
| 703 | #else |
Jani Nikula | 0657b6b | 2012-10-19 14:51:46 +0300 | [diff] [blame] | 704 | int intel_panel_setup_backlight(struct drm_connector *connector) |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 705 | { |
Jani Nikula | 0657b6b | 2012-10-19 14:51:46 +0300 | [diff] [blame] | 706 | intel_panel_init_backlight(connector->dev); |
Matthew Garrett | aaa6fd2 | 2011-08-12 12:11:33 +0200 | [diff] [blame] | 707 | return 0; |
| 708 | } |
| 709 | |
| 710 | void intel_panel_destroy_backlight(struct drm_device *dev) |
| 711 | { |
| 712 | return; |
| 713 | } |
| 714 | #endif |
Jani Nikula | 1d50870 | 2012-10-19 14:51:49 +0300 | [diff] [blame] | 715 | |
Jani Nikula | dd06f90 | 2012-10-19 14:51:50 +0300 | [diff] [blame] | 716 | int intel_panel_init(struct intel_panel *panel, |
| 717 | struct drm_display_mode *fixed_mode) |
Jani Nikula | 1d50870 | 2012-10-19 14:51:49 +0300 | [diff] [blame] | 718 | { |
Jani Nikula | dd06f90 | 2012-10-19 14:51:50 +0300 | [diff] [blame] | 719 | panel->fixed_mode = fixed_mode; |
| 720 | |
Jani Nikula | 1d50870 | 2012-10-19 14:51:49 +0300 | [diff] [blame] | 721 | return 0; |
| 722 | } |
| 723 | |
| 724 | void intel_panel_fini(struct intel_panel *panel) |
| 725 | { |
Jani Nikula | dd06f90 | 2012-10-19 14:51:50 +0300 | [diff] [blame] | 726 | struct intel_connector *intel_connector = |
| 727 | container_of(panel, struct intel_connector, panel); |
| 728 | |
| 729 | if (panel->fixed_mode) |
| 730 | drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode); |
Jani Nikula | 1d50870 | 2012-10-19 14:51:49 +0300 | [diff] [blame] | 731 | } |