blob: f1a649990ea9e61d5f7ff6f8b15e127d6fcc2f17 [file] [log] [blame]
Jesse Barnes79e53942008-11-07 14:24:08 -08001/*
2 * Copyright © 2006-2007 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 */
29
Jesse Barnesc1c7af62009-09-10 15:28:03 -070030#include <acpi/button.h>
Paul Collins565dcd42009-02-04 23:05:41 +130031#include <linux/dmi.h>
Jesse Barnes79e53942008-11-07 14:24:08 -080032#include <linux/i2c.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090033#include <linux/slab.h>
Jesse Barnes79e53942008-11-07 14:24:08 -080034#include "drmP.h"
35#include "drm.h"
36#include "drm_crtc.h"
37#include "drm_edid.h"
38#include "intel_drv.h"
39#include "i915_drm.h"
40#include "i915_drv.h"
Zhao Yakuie99da352009-06-26 09:46:18 +080041#include <linux/acpi.h>
Jesse Barnes79e53942008-11-07 14:24:08 -080042
Zhao Yakui3fbe18d2009-06-22 15:31:25 +080043/* Private structure for the integrated LVDS support */
Chris Wilsonea5b2132010-08-04 13:50:23 +010044struct intel_lvds {
45 struct intel_encoder base;
Chris Wilson788319d2010-09-12 17:34:41 +010046
Chris Wilson219adae2010-09-16 23:05:10 +010047 struct edid *edid;
Chris Wilson788319d2010-09-12 17:34:41 +010048
Zhao Yakui3fbe18d2009-06-22 15:31:25 +080049 int fitting_mode;
50 u32 pfit_control;
51 u32 pfit_pgm_ratios;
Chris Wilsone9e331a2010-09-13 01:16:10 +010052 bool pfit_dirty;
Chris Wilson788319d2010-09-12 17:34:41 +010053
54 struct drm_display_mode *fixed_mode;
Zhao Yakui3fbe18d2009-06-22 15:31:25 +080055};
56
Chris Wilson788319d2010-09-12 17:34:41 +010057static struct intel_lvds *to_intel_lvds(struct drm_encoder *encoder)
Chris Wilsonea5b2132010-08-04 13:50:23 +010058{
Chris Wilson4ef69c72010-09-09 15:14:28 +010059 return container_of(encoder, struct intel_lvds, base.base);
Chris Wilsonea5b2132010-08-04 13:50:23 +010060}
61
Chris Wilson788319d2010-09-12 17:34:41 +010062static struct intel_lvds *intel_attached_lvds(struct drm_connector *connector)
63{
64 return container_of(intel_attached_encoder(connector),
65 struct intel_lvds, base);
66}
67
Jesse Barnes79e53942008-11-07 14:24:08 -080068/**
Jesse Barnes79e53942008-11-07 14:24:08 -080069 * Sets the power state for the panel.
70 */
Chris Wilsone9e331a2010-09-13 01:16:10 +010071static void intel_lvds_set_power(struct intel_lvds *intel_lvds, bool on)
Jesse Barnes79e53942008-11-07 14:24:08 -080072{
Chris Wilsone9e331a2010-09-13 01:16:10 +010073 struct drm_device *dev = intel_lvds->base.base.dev;
Jesse Barnes79e53942008-11-07 14:24:08 -080074 struct drm_i915_private *dev_priv = dev->dev_private;
Chris Wilsone9e331a2010-09-13 01:16:10 +010075 u32 ctl_reg, lvds_reg;
Zhenyu Wang541998a2009-06-05 15:38:44 +080076
Eric Anholtc619eed2010-01-28 16:45:52 -080077 if (HAS_PCH_SPLIT(dev)) {
Zhenyu Wang541998a2009-06-05 15:38:44 +080078 ctl_reg = PCH_PP_CONTROL;
Jesse Barnes469d1292010-02-11 12:41:05 -080079 lvds_reg = PCH_LVDS;
Zhenyu Wang541998a2009-06-05 15:38:44 +080080 } else {
81 ctl_reg = PP_CONTROL;
Jesse Barnes469d1292010-02-11 12:41:05 -080082 lvds_reg = LVDS;
Zhenyu Wang541998a2009-06-05 15:38:44 +080083 }
Jesse Barnes79e53942008-11-07 14:24:08 -080084
85 if (on) {
Jesse Barnes469d1292010-02-11 12:41:05 -080086 I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
Chris Wilson77d07fd2010-09-12 12:42:35 +010087 I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
Chris Wilsona9573552010-08-22 13:18:16 +010088 intel_panel_set_backlight(dev, dev_priv->backlight_level);
Jesse Barnes79e53942008-11-07 14:24:08 -080089 } else {
Chris Wilsone9e331a2010-09-13 01:16:10 +010090 dev_priv->backlight_level = intel_panel_get_backlight(dev);
91
Chris Wilsona9573552010-08-22 13:18:16 +010092 intel_panel_set_backlight(dev, 0);
Chris Wilson77d07fd2010-09-12 12:42:35 +010093 I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
Chris Wilsone9e331a2010-09-13 01:16:10 +010094
95 if (intel_lvds->pfit_control) {
96 if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000))
97 DRM_ERROR("timed out waiting for panel to power off\n");
98 I915_WRITE(PFIT_CONTROL, 0);
99 intel_lvds->pfit_control = 0;
Chris Wilson4fd21dc2010-09-21 14:06:12 +0100100 intel_lvds->pfit_dirty = false;
Chris Wilsone9e331a2010-09-13 01:16:10 +0100101 }
102
Jesse Barnes469d1292010-02-11 12:41:05 -0800103 I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
Jesse Barnes79e53942008-11-07 14:24:08 -0800104 }
Chris Wilsonc9f9ccc2010-09-12 13:07:25 +0100105 POSTING_READ(lvds_reg);
Jesse Barnes79e53942008-11-07 14:24:08 -0800106}
107
108static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
109{
Chris Wilson788319d2010-09-12 17:34:41 +0100110 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
Jesse Barnes79e53942008-11-07 14:24:08 -0800111
112 if (mode == DRM_MODE_DPMS_ON)
Chris Wilsone9e331a2010-09-13 01:16:10 +0100113 intel_lvds_set_power(intel_lvds, true);
Jesse Barnes79e53942008-11-07 14:24:08 -0800114 else
Chris Wilsone9e331a2010-09-13 01:16:10 +0100115 intel_lvds_set_power(intel_lvds, false);
Jesse Barnes79e53942008-11-07 14:24:08 -0800116
117 /* XXX: We never power down the LVDS pairs. */
118}
119
Jesse Barnes79e53942008-11-07 14:24:08 -0800120static int intel_lvds_mode_valid(struct drm_connector *connector,
121 struct drm_display_mode *mode)
122{
Chris Wilson788319d2010-09-12 17:34:41 +0100123 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
124 struct drm_display_mode *fixed_mode = intel_lvds->fixed_mode;
Jesse Barnes79e53942008-11-07 14:24:08 -0800125
Chris Wilson788319d2010-09-12 17:34:41 +0100126 if (mode->hdisplay > fixed_mode->hdisplay)
127 return MODE_PANEL;
128 if (mode->vdisplay > fixed_mode->vdisplay)
129 return MODE_PANEL;
Jesse Barnes79e53942008-11-07 14:24:08 -0800130
131 return MODE_OK;
132}
133
Chris Wilson49be6632010-07-18 12:05:54 +0100134static void
135centre_horizontally(struct drm_display_mode *mode,
136 int width)
137{
138 u32 border, sync_pos, blank_width, sync_width;
139
140 /* keep the hsync and hblank widths constant */
141 sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start;
142 blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start;
143 sync_pos = (blank_width - sync_width + 1) / 2;
144
145 border = (mode->hdisplay - width + 1) / 2;
146 border += border & 1; /* make the border even */
147
148 mode->crtc_hdisplay = width;
149 mode->crtc_hblank_start = width + border;
150 mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width;
151
152 mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos;
153 mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width;
154}
155
156static void
157centre_vertically(struct drm_display_mode *mode,
158 int height)
159{
160 u32 border, sync_pos, blank_width, sync_width;
161
162 /* keep the vsync and vblank widths constant */
163 sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start;
164 blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start;
165 sync_pos = (blank_width - sync_width + 1) / 2;
166
167 border = (mode->vdisplay - height + 1) / 2;
168
169 mode->crtc_vdisplay = height;
170 mode->crtc_vblank_start = height + border;
171 mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width;
172
173 mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos;
174 mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width;
175}
176
177static inline u32 panel_fitter_scaling(u32 source, u32 target)
178{
179 /*
180 * Floating point operation is not supported. So the FACTOR
181 * is defined, which can avoid the floating point computation
182 * when calculating the panel ratio.
183 */
184#define ACCURACY 12
185#define FACTOR (1 << ACCURACY)
186 u32 ratio = source * FACTOR / target;
187 return (FACTOR * ratio + FACTOR/2) / FACTOR;
188}
189
Jesse Barnes79e53942008-11-07 14:24:08 -0800190static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
191 struct drm_display_mode *mode,
192 struct drm_display_mode *adjusted_mode)
193{
194 struct drm_device *dev = encoder->dev;
195 struct drm_i915_private *dev_priv = dev->dev_private;
196 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
Chris Wilson788319d2010-09-12 17:34:41 +0100197 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
Jesse Barnes79e53942008-11-07 14:24:08 -0800198 struct drm_encoder *tmp_encoder;
Chris Wilson49be6632010-07-18 12:05:54 +0100199 u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
Jesse Barnes79e53942008-11-07 14:24:08 -0800200
201 /* Should never happen!! */
Chris Wilsona6c45cf2010-09-17 00:32:17 +0100202 if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
Keith Packard1ae8c0a2009-06-28 15:42:17 -0700203 DRM_ERROR("Can't support LVDS on pipe A\n");
Jesse Barnes79e53942008-11-07 14:24:08 -0800204 return false;
205 }
206
207 /* Should never happen!! */
208 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
209 if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
Keith Packard1ae8c0a2009-06-28 15:42:17 -0700210 DRM_ERROR("Can't enable LVDS and another "
Jesse Barnes79e53942008-11-07 14:24:08 -0800211 "encoder on the same pipe\n");
212 return false;
213 }
214 }
Chris Wilson1d8e1c72010-08-07 11:01:28 +0100215
Jesse Barnes79e53942008-11-07 14:24:08 -0800216 /*
Chris Wilson71677042010-07-17 13:38:43 +0100217 * We have timings from the BIOS for the panel, put them in
Jesse Barnes79e53942008-11-07 14:24:08 -0800218 * to the adjusted mode. The CRTC will be set up for this mode,
219 * with the panel scaling set up to source from the H/VDisplay
220 * of the original mode.
221 */
Chris Wilson788319d2010-09-12 17:34:41 +0100222 intel_fixed_panel_mode(intel_lvds->fixed_mode, adjusted_mode);
Chris Wilson1d8e1c72010-08-07 11:01:28 +0100223
224 if (HAS_PCH_SPLIT(dev)) {
225 intel_pch_panel_fitting(dev, intel_lvds->fitting_mode,
226 mode, adjusted_mode);
227 return true;
228 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800229
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800230 /* Make sure pre-965s set dither correctly */
Chris Wilsona6c45cf2010-09-17 00:32:17 +0100231 if (INTEL_INFO(dev)->gen < 4) {
Chris Wilsond3849ed2010-09-23 22:12:23 +0100232 if (dev_priv->lvds_dither)
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800233 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
234 }
235
236 /* Native modes don't need fitting */
237 if (adjusted_mode->hdisplay == mode->hdisplay &&
Chris Wilson49be6632010-07-18 12:05:54 +0100238 adjusted_mode->vdisplay == mode->vdisplay)
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800239 goto out;
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800240
241 /* 965+ wants fuzzy fitting */
Chris Wilsona6c45cf2010-09-17 00:32:17 +0100242 if (INTEL_INFO(dev)->gen >= 4)
Chris Wilson49be6632010-07-18 12:05:54 +0100243 pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
244 PFIT_FILTER_FUZZY);
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800245
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800246 /*
247 * Enable automatic panel scaling for non-native modes so that they fill
248 * the screen. Should be enabled before the pipe is enabled, according
249 * to register description and PRM.
250 * Change the value here to see the borders for debugging
251 */
Chris Wilson1d8e1c72010-08-07 11:01:28 +0100252 I915_WRITE(BCLRPAT_A, 0);
253 I915_WRITE(BCLRPAT_B, 0);
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800254
Chris Wilsonea5b2132010-08-04 13:50:23 +0100255 switch (intel_lvds->fitting_mode) {
Jesse Barnes53bd8382009-07-01 10:04:40 -0700256 case DRM_MODE_SCALE_CENTER:
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800257 /*
258 * For centered modes, we have to calculate border widths &
259 * heights and modify the values programmed into the CRTC.
260 */
Chris Wilson49be6632010-07-18 12:05:54 +0100261 centre_horizontally(adjusted_mode, mode->hdisplay);
262 centre_vertically(adjusted_mode, mode->vdisplay);
263 border = LVDS_BORDER_ENABLE;
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800264 break;
Chris Wilson49be6632010-07-18 12:05:54 +0100265
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800266 case DRM_MODE_SCALE_ASPECT:
Chris Wilson49be6632010-07-18 12:05:54 +0100267 /* Scale but preserve the aspect ratio */
Chris Wilsona6c45cf2010-09-17 00:32:17 +0100268 if (INTEL_INFO(dev)->gen >= 4) {
Chris Wilson49be6632010-07-18 12:05:54 +0100269 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
270 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
271
272 pfit_control |= PFIT_ENABLE;
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800273 /* 965+ is easy, it does everything in hw */
Chris Wilson49be6632010-07-18 12:05:54 +0100274 if (scaled_width > scaled_height)
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800275 pfit_control |= PFIT_SCALING_PILLAR;
Chris Wilson49be6632010-07-18 12:05:54 +0100276 else if (scaled_width < scaled_height)
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800277 pfit_control |= PFIT_SCALING_LETTER;
278 else
279 pfit_control |= PFIT_SCALING_AUTO;
280 } else {
Chris Wilson49be6632010-07-18 12:05:54 +0100281 u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
282 u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800283 /*
284 * For earlier chips we have to calculate the scaling
285 * ratio by hand and program it into the
286 * PFIT_PGM_RATIO register
287 */
Chris Wilson49be6632010-07-18 12:05:54 +0100288 if (scaled_width > scaled_height) { /* pillar */
289 centre_horizontally(adjusted_mode, scaled_height / mode->vdisplay);
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800290
Chris Wilson49be6632010-07-18 12:05:54 +0100291 border = LVDS_BORDER_ENABLE;
292 if (mode->vdisplay != adjusted_mode->vdisplay) {
293 u32 bits = panel_fitter_scaling(mode->vdisplay, adjusted_mode->vdisplay);
294 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
295 bits << PFIT_VERT_SCALE_SHIFT);
296 pfit_control |= (PFIT_ENABLE |
297 VERT_INTERP_BILINEAR |
298 HORIZ_INTERP_BILINEAR);
299 }
300 } else if (scaled_width < scaled_height) { /* letter */
301 centre_vertically(adjusted_mode, scaled_width / mode->hdisplay);
302
303 border = LVDS_BORDER_ENABLE;
304 if (mode->hdisplay != adjusted_mode->hdisplay) {
305 u32 bits = panel_fitter_scaling(mode->hdisplay, adjusted_mode->hdisplay);
306 pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
307 bits << PFIT_VERT_SCALE_SHIFT);
308 pfit_control |= (PFIT_ENABLE |
309 VERT_INTERP_BILINEAR |
310 HORIZ_INTERP_BILINEAR);
311 }
312 } else
313 /* Aspects match, Let hw scale both directions */
314 pfit_control |= (PFIT_ENABLE |
315 VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800316 VERT_INTERP_BILINEAR |
317 HORIZ_INTERP_BILINEAR);
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800318 }
319 break;
320
321 case DRM_MODE_SCALE_FULLSCREEN:
322 /*
323 * Full scaling, even if it changes the aspect ratio.
324 * Fortunately this is all done for us in hw.
325 */
326 pfit_control |= PFIT_ENABLE;
Chris Wilsona6c45cf2010-09-17 00:32:17 +0100327 if (INTEL_INFO(dev)->gen >= 4)
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800328 pfit_control |= PFIT_SCALING_AUTO;
329 else
330 pfit_control |= (VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
331 VERT_INTERP_BILINEAR |
332 HORIZ_INTERP_BILINEAR);
333 break;
Chris Wilson49be6632010-07-18 12:05:54 +0100334
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800335 default:
336 break;
337 }
338
339out:
Chris Wilsone9e331a2010-09-13 01:16:10 +0100340 if (pfit_control != intel_lvds->pfit_control ||
341 pfit_pgm_ratios != intel_lvds->pfit_pgm_ratios) {
342 intel_lvds->pfit_control = pfit_control;
343 intel_lvds->pfit_pgm_ratios = pfit_pgm_ratios;
344 intel_lvds->pfit_dirty = true;
345 }
Chris Wilson49be6632010-07-18 12:05:54 +0100346 dev_priv->lvds_border_bits = border;
347
Zhao Yakuia3e17eb2009-10-10 10:42:37 +0800348 /*
Jesse Barnes79e53942008-11-07 14:24:08 -0800349 * XXX: It would be nice to support lower refresh rates on the
350 * panels to reduce power consumption, and perhaps match the
351 * user's requested refresh rate.
352 */
353
354 return true;
355}
356
357static void intel_lvds_prepare(struct drm_encoder *encoder)
358{
359 struct drm_device *dev = encoder->dev;
360 struct drm_i915_private *dev_priv = dev->dev_private;
Chris Wilson788319d2010-09-12 17:34:41 +0100361 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
Jesse Barnes79e53942008-11-07 14:24:08 -0800362
Chris Wilsona9573552010-08-22 13:18:16 +0100363 dev_priv->backlight_level = intel_panel_get_backlight(dev);
Jesse Barnes79e53942008-11-07 14:24:08 -0800364
Chris Wilsone9e331a2010-09-13 01:16:10 +0100365 /* We try to do the minimum that is necessary in order to unlock
366 * the registers for mode setting.
367 *
368 * On Ironlake, this is quite simple as we just set the unlock key
369 * and ignore all subtleties. (This may cause some issues...)
370 *
371 * Prior to Ironlake, we must disable the pipe if we want to adjust
372 * the panel fitter. However at all other times we can just reset
373 * the registers regardless.
374 */
375
376 if (HAS_PCH_SPLIT(dev)) {
377 I915_WRITE(PCH_PP_CONTROL,
378 I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
379 } else if (intel_lvds->pfit_dirty) {
380 I915_WRITE(PP_CONTROL,
Chris Wilson4fd21dc2010-09-21 14:06:12 +0100381 (I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS)
382 & ~POWER_TARGET_ON);
Chris Wilsone9e331a2010-09-13 01:16:10 +0100383 } else {
384 I915_WRITE(PP_CONTROL,
385 I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
386 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800387}
388
Chris Wilsone9e331a2010-09-13 01:16:10 +0100389static void intel_lvds_commit(struct drm_encoder *encoder)
Jesse Barnes79e53942008-11-07 14:24:08 -0800390{
391 struct drm_device *dev = encoder->dev;
392 struct drm_i915_private *dev_priv = dev->dev_private;
Chris Wilson788319d2010-09-12 17:34:41 +0100393 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
Jesse Barnes79e53942008-11-07 14:24:08 -0800394
Chris Wilsona9573552010-08-22 13:18:16 +0100395 if (dev_priv->backlight_level == 0)
396 dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
Jesse Barnes79e53942008-11-07 14:24:08 -0800397
Chris Wilsone9e331a2010-09-13 01:16:10 +0100398 /* Undo any unlocking done in prepare to prevent accidental
399 * adjustment of the registers.
400 */
401 if (HAS_PCH_SPLIT(dev)) {
402 u32 val = I915_READ(PCH_PP_CONTROL);
403 if ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS)
404 I915_WRITE(PCH_PP_CONTROL, val & 0x3);
405 } else {
406 u32 val = I915_READ(PP_CONTROL);
407 if ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS)
408 I915_WRITE(PP_CONTROL, val & 0x3);
409 }
410
411 /* Always do a full power on as we do not know what state
412 * we were left in.
413 */
414 intel_lvds_set_power(intel_lvds, true);
Jesse Barnes79e53942008-11-07 14:24:08 -0800415}
416
417static void intel_lvds_mode_set(struct drm_encoder *encoder,
418 struct drm_display_mode *mode,
419 struct drm_display_mode *adjusted_mode)
420{
421 struct drm_device *dev = encoder->dev;
422 struct drm_i915_private *dev_priv = dev->dev_private;
Chris Wilson788319d2010-09-12 17:34:41 +0100423 struct intel_lvds *intel_lvds = to_intel_lvds(encoder);
Jesse Barnes79e53942008-11-07 14:24:08 -0800424
425 /*
426 * The LVDS pin pair will already have been turned on in the
427 * intel_crtc_mode_set since it has a large impact on the DPLL
428 * settings.
429 */
430
Eric Anholtc619eed2010-01-28 16:45:52 -0800431 if (HAS_PCH_SPLIT(dev))
Zhenyu Wang541998a2009-06-05 15:38:44 +0800432 return;
433
Chris Wilsone9e331a2010-09-13 01:16:10 +0100434 if (!intel_lvds->pfit_dirty)
435 return;
436
Jesse Barnes79e53942008-11-07 14:24:08 -0800437 /*
438 * Enable automatic panel scaling so that non-native modes fill the
439 * screen. Should be enabled before the pipe is enabled, according to
440 * register description and PRM.
441 */
Chris Wilson4fd21dc2010-09-21 14:06:12 +0100442 DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
443 intel_lvds->pfit_control,
444 intel_lvds->pfit_pgm_ratios);
Chris Wilsone9e331a2010-09-13 01:16:10 +0100445 if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000))
446 DRM_ERROR("timed out waiting for panel to power off\n");
447
Chris Wilsonea5b2132010-08-04 13:50:23 +0100448 I915_WRITE(PFIT_PGM_RATIOS, intel_lvds->pfit_pgm_ratios);
449 I915_WRITE(PFIT_CONTROL, intel_lvds->pfit_control);
Chris Wilsone9e331a2010-09-13 01:16:10 +0100450 intel_lvds->pfit_dirty = false;
Jesse Barnes79e53942008-11-07 14:24:08 -0800451}
452
453/**
454 * Detect the LVDS connection.
455 *
Jesse Barnesb42d4c52009-09-10 15:28:04 -0700456 * Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
457 * connected and closed means disconnected. We also send hotplug events as
458 * needed, using lid status notification from the input layer.
Jesse Barnes79e53942008-11-07 14:24:08 -0800459 */
Chris Wilson7b334fc2010-09-09 23:51:02 +0100460static enum drm_connector_status
Chris Wilson930a9e22010-09-14 11:07:23 +0100461intel_lvds_detect(struct drm_connector *connector, bool force)
Jesse Barnes79e53942008-11-07 14:24:08 -0800462{
Jesse Barnes7b9c5ab2010-02-12 09:30:00 -0800463 struct drm_device *dev = connector->dev;
Jesse Barnesb42d4c52009-09-10 15:28:04 -0700464 enum drm_connector_status status = connector_status_connected;
465
Jesse Barnes7b9c5ab2010-02-12 09:30:00 -0800466 /* ACPI lid methods were generally unreliable in this generation, so
467 * don't even bother.
468 */
Eric Anholt6e6c8222010-03-17 13:48:06 -0700469 if (IS_GEN2(dev) || IS_GEN3(dev))
Jesse Barnes7b9c5ab2010-02-12 09:30:00 -0800470 return connector_status_connected;
471
Jesse Barnesb42d4c52009-09-10 15:28:04 -0700472 return status;
Jesse Barnes79e53942008-11-07 14:24:08 -0800473}
474
475/**
476 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
477 */
478static int intel_lvds_get_modes(struct drm_connector *connector)
479{
Chris Wilson788319d2010-09-12 17:34:41 +0100480 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
Jesse Barnes79e53942008-11-07 14:24:08 -0800481 struct drm_device *dev = connector->dev;
Chris Wilson788319d2010-09-12 17:34:41 +0100482 struct drm_display_mode *mode;
Jesse Barnes79e53942008-11-07 14:24:08 -0800483
Chris Wilson219adae2010-09-16 23:05:10 +0100484 if (intel_lvds->edid) {
485 drm_mode_connector_update_edid_property(connector,
486 intel_lvds->edid);
487 return drm_add_edid_modes(connector, intel_lvds->edid);
Zhao Yakuibfac4d62010-04-07 17:11:22 +0800488 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800489
Chris Wilson788319d2010-09-12 17:34:41 +0100490 mode = drm_mode_duplicate(dev, intel_lvds->fixed_mode);
491 if (mode == 0)
492 return 0;
Jesse Barnes79e53942008-11-07 14:24:08 -0800493
Chris Wilson788319d2010-09-12 17:34:41 +0100494 drm_mode_probed_add(connector, mode);
495 return 1;
Jesse Barnes79e53942008-11-07 14:24:08 -0800496}
497
Thomas Bächler0544edf2010-07-02 10:44:23 +0200498static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
499{
500 DRM_DEBUG_KMS("Skipping forced modeset for %s\n", id->ident);
501 return 1;
502}
503
504/* The GPU hangs up on these systems if modeset is performed on LID open */
505static const struct dmi_system_id intel_no_modeset_on_lid[] = {
506 {
507 .callback = intel_no_modeset_on_lid_dmi_callback,
508 .ident = "Toshiba Tecra A11",
509 .matches = {
510 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
511 DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
512 },
513 },
514
515 { } /* terminating entry */
516};
517
Linus Torvaldsc9354c82009-11-02 09:29:55 -0800518/*
519 * Lid events. Note the use of 'modeset_on_lid':
520 * - we set it on lid close, and reset it on open
521 * - we use it as a "only once" bit (ie we ignore
522 * duplicate events where it was already properly
523 * set/reset)
524 * - the suspend/resume paths will also set it to
525 * zero, since they restore the mode ("lid open").
526 */
Jesse Barnesc1c7af62009-09-10 15:28:03 -0700527static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
528 void *unused)
529{
530 struct drm_i915_private *dev_priv =
531 container_of(nb, struct drm_i915_private, lid_notifier);
532 struct drm_device *dev = dev_priv->dev;
Zhao Yakuia2565372009-12-11 09:26:11 +0800533 struct drm_connector *connector = dev_priv->int_lvds_connector;
Jesse Barnesc1c7af62009-09-10 15:28:03 -0700534
Zhao Yakuia2565372009-12-11 09:26:11 +0800535 /*
536 * check and update the status of LVDS connector after receiving
537 * the LID nofication event.
538 */
539 if (connector)
Chris Wilson7b334fc2010-09-09 23:51:02 +0100540 connector->status = connector->funcs->detect(connector,
Chris Wilson930a9e22010-09-14 11:07:23 +0100541 false);
Chris Wilson7b334fc2010-09-09 23:51:02 +0100542
Thomas Bächler0544edf2010-07-02 10:44:23 +0200543 /* Don't force modeset on machines where it causes a GPU lockup */
544 if (dmi_check_system(intel_no_modeset_on_lid))
545 return NOTIFY_OK;
Linus Torvaldsc9354c82009-11-02 09:29:55 -0800546 if (!acpi_lid_open()) {
547 dev_priv->modeset_on_lid = 1;
548 return NOTIFY_OK;
Jesse Barnes06891e22009-09-14 10:58:48 -0700549 }
Jesse Barnesc1c7af62009-09-10 15:28:03 -0700550
Linus Torvaldsc9354c82009-11-02 09:29:55 -0800551 if (!dev_priv->modeset_on_lid)
552 return NOTIFY_OK;
553
554 dev_priv->modeset_on_lid = 0;
555
556 mutex_lock(&dev->mode_config.mutex);
557 drm_helper_resume_force_mode(dev);
558 mutex_unlock(&dev->mode_config.mutex);
Jesse Barnes06324192009-09-10 15:28:05 -0700559
Jesse Barnesc1c7af62009-09-10 15:28:03 -0700560 return NOTIFY_OK;
561}
562
Jesse Barnes79e53942008-11-07 14:24:08 -0800563/**
564 * intel_lvds_destroy - unregister and free LVDS structures
565 * @connector: connector to free
566 *
567 * Unregister the DDC bus for this connector then free the driver private
568 * structure.
569 */
570static void intel_lvds_destroy(struct drm_connector *connector)
571{
Jesse Barnesc1c7af62009-09-10 15:28:03 -0700572 struct drm_device *dev = connector->dev;
Jesse Barnesc1c7af62009-09-10 15:28:03 -0700573 struct drm_i915_private *dev_priv = dev->dev_private;
Jesse Barnes79e53942008-11-07 14:24:08 -0800574
Jesse Barnesc1c7af62009-09-10 15:28:03 -0700575 if (dev_priv->lid_notifier.notifier_call)
576 acpi_lid_notifier_unregister(&dev_priv->lid_notifier);
Jesse Barnes79e53942008-11-07 14:24:08 -0800577 drm_sysfs_connector_remove(connector);
578 drm_connector_cleanup(connector);
579 kfree(connector);
580}
581
Jesse Barnes335041e2009-01-22 22:22:06 +1000582static int intel_lvds_set_property(struct drm_connector *connector,
583 struct drm_property *property,
584 uint64_t value)
585{
Chris Wilson788319d2010-09-12 17:34:41 +0100586 struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800587 struct drm_device *dev = connector->dev;
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800588
Chris Wilson788319d2010-09-12 17:34:41 +0100589 if (property == dev->mode_config.scaling_mode_property) {
590 struct drm_crtc *crtc = intel_lvds->base.base.crtc;
Zhenyu Wangbb8a3562010-03-29 16:40:50 +0800591
Jesse Barnes53bd8382009-07-01 10:04:40 -0700592 if (value == DRM_MODE_SCALE_NONE) {
593 DRM_DEBUG_KMS("no scaling not supported\n");
Chris Wilson788319d2010-09-12 17:34:41 +0100594 return -EINVAL;
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800595 }
Chris Wilson788319d2010-09-12 17:34:41 +0100596
Chris Wilsonea5b2132010-08-04 13:50:23 +0100597 if (intel_lvds->fitting_mode == value) {
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800598 /* the LVDS scaling property is not changed */
599 return 0;
600 }
Chris Wilsonea5b2132010-08-04 13:50:23 +0100601 intel_lvds->fitting_mode = value;
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800602 if (crtc && crtc->enabled) {
603 /*
604 * If the CRTC is enabled, the display will be changed
605 * according to the new panel fitting mode.
606 */
607 drm_crtc_helper_set_mode(crtc, &crtc->mode,
608 crtc->x, crtc->y, crtc->fb);
609 }
610 }
611
Jesse Barnes335041e2009-01-22 22:22:06 +1000612 return 0;
613}
614
Jesse Barnes79e53942008-11-07 14:24:08 -0800615static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
616 .dpms = intel_lvds_dpms,
617 .mode_fixup = intel_lvds_mode_fixup,
618 .prepare = intel_lvds_prepare,
619 .mode_set = intel_lvds_mode_set,
620 .commit = intel_lvds_commit,
621};
622
623static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
624 .get_modes = intel_lvds_get_modes,
625 .mode_valid = intel_lvds_mode_valid,
Chris Wilsondf0e9242010-09-09 16:20:55 +0100626 .best_encoder = intel_best_encoder,
Jesse Barnes79e53942008-11-07 14:24:08 -0800627};
628
629static const struct drm_connector_funcs intel_lvds_connector_funcs = {
Keith Packardc9fb15f2009-05-30 20:42:28 -0700630 .dpms = drm_helper_connector_dpms,
Jesse Barnes79e53942008-11-07 14:24:08 -0800631 .detect = intel_lvds_detect,
632 .fill_modes = drm_helper_probe_single_connector_modes,
Jesse Barnes335041e2009-01-22 22:22:06 +1000633 .set_property = intel_lvds_set_property,
Jesse Barnes79e53942008-11-07 14:24:08 -0800634 .destroy = intel_lvds_destroy,
635};
636
Jesse Barnes79e53942008-11-07 14:24:08 -0800637static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
Chris Wilsonea5b2132010-08-04 13:50:23 +0100638 .destroy = intel_encoder_destroy,
Jesse Barnes79e53942008-11-07 14:24:08 -0800639};
640
Jarod Wilson425d2442009-05-05 10:00:25 -0400641static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
642{
Zhao Yakui8a4c47f2009-07-20 13:48:04 +0800643 DRM_DEBUG_KMS("Skipping LVDS initialization for %s\n", id->ident);
Jarod Wilson425d2442009-05-05 10:00:25 -0400644 return 1;
645}
Jesse Barnes79e53942008-11-07 14:24:08 -0800646
Jarod Wilson425d2442009-05-05 10:00:25 -0400647/* These systems claim to have LVDS, but really don't */
Jaswinder Singh Rajput93c05f22009-06-04 09:41:19 +1000648static const struct dmi_system_id intel_no_lvds[] = {
Jarod Wilson425d2442009-05-05 10:00:25 -0400649 {
650 .callback = intel_no_lvds_dmi_callback,
651 .ident = "Apple Mac Mini (Core series)",
652 .matches = {
Keith Packard98acd462009-06-14 12:31:58 -0700653 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
Jarod Wilson425d2442009-05-05 10:00:25 -0400654 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
655 },
656 },
657 {
658 .callback = intel_no_lvds_dmi_callback,
659 .ident = "Apple Mac Mini (Core 2 series)",
660 .matches = {
Keith Packard98acd462009-06-14 12:31:58 -0700661 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
Jarod Wilson425d2442009-05-05 10:00:25 -0400662 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
663 },
664 },
665 {
666 .callback = intel_no_lvds_dmi_callback,
667 .ident = "MSI IM-945GSE-A",
668 .matches = {
669 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
670 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
671 },
672 },
673 {
674 .callback = intel_no_lvds_dmi_callback,
675 .ident = "Dell Studio Hybrid",
676 .matches = {
677 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
678 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
679 },
680 },
Jarod Wilson70aa96c2009-05-27 17:20:39 -0400681 {
682 .callback = intel_no_lvds_dmi_callback,
683 .ident = "AOpen Mini PC",
684 .matches = {
685 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
686 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
687 },
688 },
Michael Cousinfa0864b2009-06-05 21:16:22 +0200689 {
690 .callback = intel_no_lvds_dmi_callback,
Tormod Voldened8c7542009-07-13 22:26:48 +0200691 .ident = "AOpen Mini PC MP915",
692 .matches = {
693 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
694 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
695 },
696 },
697 {
698 .callback = intel_no_lvds_dmi_callback,
Michael Cousinfa0864b2009-06-05 21:16:22 +0200699 .ident = "Aopen i945GTt-VFA",
700 .matches = {
701 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
702 },
703 },
Stefan Bader9875557ee82010-03-29 17:53:12 +0200704 {
705 .callback = intel_no_lvds_dmi_callback,
706 .ident = "Clientron U800",
707 .matches = {
708 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
709 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
710 },
711 },
Jarod Wilson425d2442009-05-05 10:00:25 -0400712
713 { } /* terminating entry */
714};
Jesse Barnes79e53942008-11-07 14:24:08 -0800715
716/**
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000717 * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
718 * @dev: drm device
719 * @connector: LVDS connector
720 *
721 * Find the reduced downclock for LVDS in EDID.
722 */
723static void intel_find_lvds_downclock(struct drm_device *dev,
Chris Wilson788319d2010-09-12 17:34:41 +0100724 struct drm_display_mode *fixed_mode,
725 struct drm_connector *connector)
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000726{
727 struct drm_i915_private *dev_priv = dev->dev_private;
Chris Wilson788319d2010-09-12 17:34:41 +0100728 struct drm_display_mode *scan;
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000729 int temp_downclock;
730
Chris Wilson788319d2010-09-12 17:34:41 +0100731 temp_downclock = fixed_mode->clock;
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000732 list_for_each_entry(scan, &connector->probed_modes, head) {
733 /*
734 * If one mode has the same resolution with the fixed_panel
735 * mode while they have the different refresh rate, it means
736 * that the reduced downclock is found for the LVDS. In such
737 * case we can set the different FPx0/1 to dynamically select
738 * between low and high frequency.
739 */
Chris Wilson788319d2010-09-12 17:34:41 +0100740 if (scan->hdisplay == fixed_mode->hdisplay &&
741 scan->hsync_start == fixed_mode->hsync_start &&
742 scan->hsync_end == fixed_mode->hsync_end &&
743 scan->htotal == fixed_mode->htotal &&
744 scan->vdisplay == fixed_mode->vdisplay &&
745 scan->vsync_start == fixed_mode->vsync_start &&
746 scan->vsync_end == fixed_mode->vsync_end &&
747 scan->vtotal == fixed_mode->vtotal) {
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000748 if (scan->clock < temp_downclock) {
749 /*
750 * The downclock is already found. But we
751 * expect to find the lower downclock.
752 */
753 temp_downclock = scan->clock;
754 }
755 }
756 }
Chris Wilson788319d2010-09-12 17:34:41 +0100757 if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000758 /* We found the downclock for LVDS. */
759 dev_priv->lvds_downclock_avail = 1;
760 dev_priv->lvds_downclock = temp_downclock;
761 DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
Chris Wilson788319d2010-09-12 17:34:41 +0100762 "Normal clock %dKhz, downclock %dKhz\n",
763 fixed_mode->clock, temp_downclock);
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000764 }
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000765}
766
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800767/*
768 * Enumerate the child dev array parsed from VBT to check whether
769 * the LVDS is present.
770 * If it is present, return 1.
771 * If it is not present, return false.
772 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800773 */
Chris Wilson270eea02010-09-24 01:15:02 +0100774static bool lvds_is_present_in_vbt(struct drm_device *dev,
775 u8 *i2c_pin)
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800776{
777 struct drm_i915_private *dev_priv = dev->dev_private;
Chris Wilson425904d2010-08-22 18:21:42 +0100778 int i;
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800779
780 if (!dev_priv->child_dev_num)
Chris Wilson425904d2010-08-22 18:21:42 +0100781 return true;
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800782
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800783 for (i = 0; i < dev_priv->child_dev_num; i++) {
Chris Wilson425904d2010-08-22 18:21:42 +0100784 struct child_device_config *child = dev_priv->child_dev + i;
785
786 /* If the device type is not LFP, continue.
787 * We have to check both the new identifiers as well as the
788 * old for compatibility with some BIOSes.
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800789 */
Chris Wilson425904d2010-08-22 18:21:42 +0100790 if (child->device_type != DEVICE_TYPE_INT_LFP &&
791 child->device_type != DEVICE_TYPE_LFP)
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800792 continue;
793
Chris Wilson270eea02010-09-24 01:15:02 +0100794 if (child->i2c_pin)
795 *i2c_pin = child->i2c_pin;
796
Chris Wilson425904d2010-08-22 18:21:42 +0100797 /* However, we cannot trust the BIOS writers to populate
798 * the VBT correctly. Since LVDS requires additional
799 * information from AIM blocks, a non-zero addin offset is
800 * a good indicator that the LVDS is actually present.
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800801 */
Chris Wilson425904d2010-08-22 18:21:42 +0100802 if (child->addin_offset)
803 return true;
804
805 /* But even then some BIOS writers perform some black magic
806 * and instantiate the device without reference to any
807 * additional data. Trust that if the VBT was written into
808 * the OpRegion then they have validated the LVDS's existence.
809 */
810 if (dev_priv->opregion.vbt)
811 return true;
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800812 }
Chris Wilson425904d2010-08-22 18:21:42 +0100813
814 return false;
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800815}
816
Chris Wilson270eea02010-09-24 01:15:02 +0100817static bool intel_lvds_ddc_probe(struct drm_device *dev, u8 pin)
Chris Wilson428d2e82010-09-23 11:16:49 +0100818{
819 struct drm_i915_private *dev_priv = dev->dev_private;
820 u8 buf = 0;
821 struct i2c_msg msgs[] = {
822 {
823 .addr = 0xA0,
824 .flags = 0,
825 .len = 1,
826 .buf = &buf,
827 },
828 };
Chris Wilson270eea02010-09-24 01:15:02 +0100829 struct i2c_adapter *i2c = &dev_priv->gmbus[pin].adapter;
Chris Wilsonb8232e92010-09-28 16:41:32 +0100830 /* XXX this only appears to work when using GMBUS */
831 if (intel_gmbus_is_forced_bit(i2c))
832 return true;
Chris Wilson428d2e82010-09-23 11:16:49 +0100833 return i2c_transfer(i2c, msgs, 1) == 1;
834}
835
Zhao Yakui18f9ed12009-11-20 03:24:16 +0000836/**
Jesse Barnes79e53942008-11-07 14:24:08 -0800837 * intel_lvds_init - setup LVDS connectors on this device
838 * @dev: drm device
839 *
840 * Create the connector, register the LVDS DDC bus, and try to figure out what
841 * modes we can display on the LVDS panel (if present).
842 */
843void intel_lvds_init(struct drm_device *dev)
844{
845 struct drm_i915_private *dev_priv = dev->dev_private;
Chris Wilsonea5b2132010-08-04 13:50:23 +0100846 struct intel_lvds *intel_lvds;
Eric Anholt21d40d32010-03-25 11:11:14 -0700847 struct intel_encoder *intel_encoder;
Zhenyu Wangbb8a3562010-03-29 16:40:50 +0800848 struct intel_connector *intel_connector;
Jesse Barnes79e53942008-11-07 14:24:08 -0800849 struct drm_connector *connector;
850 struct drm_encoder *encoder;
851 struct drm_display_mode *scan; /* *modes, *bios_mode; */
852 struct drm_crtc *crtc;
853 u32 lvds;
Chris Wilson270eea02010-09-24 01:15:02 +0100854 int pipe;
855 u8 pin;
Jesse Barnes79e53942008-11-07 14:24:08 -0800856
Jarod Wilson425d2442009-05-05 10:00:25 -0400857 /* Skip init on machines we know falsely report LVDS */
858 if (dmi_check_system(intel_no_lvds))
Paul Collins565dcd42009-02-04 23:05:41 +1300859 return;
Paul Collins565dcd42009-02-04 23:05:41 +1300860
Chris Wilson270eea02010-09-24 01:15:02 +0100861 pin = GMBUS_PORT_PANEL;
862 if (!lvds_is_present_in_vbt(dev, &pin)) {
Matthew Garrett11ba1592009-12-15 13:55:24 -0500863 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
Zhao Yakuie99da352009-06-26 09:46:18 +0800864 return;
Zhao Yakui7cf4f692009-11-24 09:48:47 +0800865 }
Zhao Yakuie99da352009-06-26 09:46:18 +0800866
Eric Anholtc619eed2010-01-28 16:45:52 -0800867 if (HAS_PCH_SPLIT(dev)) {
Zhenyu Wang541998a2009-06-05 15:38:44 +0800868 if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
869 return;
Chris Wilson5ceb0f92010-09-24 10:24:28 +0100870 if (dev_priv->edp.support) {
Zhao Yakui28c97732009-10-09 11:39:41 +0800871 DRM_DEBUG_KMS("disable LVDS for eDP support\n");
Zhenyu Wang32f9d652009-07-24 01:00:32 +0800872 return;
873 }
Zhenyu Wang541998a2009-06-05 15:38:44 +0800874 }
875
Chris Wilson270eea02010-09-24 01:15:02 +0100876 if (!intel_lvds_ddc_probe(dev, pin)) {
Chris Wilson428d2e82010-09-23 11:16:49 +0100877 DRM_DEBUG_KMS("LVDS did not respond to DDC probe\n");
878 return;
879 }
880
Chris Wilsonea5b2132010-08-04 13:50:23 +0100881 intel_lvds = kzalloc(sizeof(struct intel_lvds), GFP_KERNEL);
882 if (!intel_lvds) {
Jesse Barnes79e53942008-11-07 14:24:08 -0800883 return;
884 }
885
Zhenyu Wangbb8a3562010-03-29 16:40:50 +0800886 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
887 if (!intel_connector) {
Chris Wilsonea5b2132010-08-04 13:50:23 +0100888 kfree(intel_lvds);
Zhenyu Wangbb8a3562010-03-29 16:40:50 +0800889 return;
890 }
891
Chris Wilsone9e331a2010-09-13 01:16:10 +0100892 if (!HAS_PCH_SPLIT(dev)) {
893 intel_lvds->pfit_control = I915_READ(PFIT_CONTROL);
894 }
895
Chris Wilsonea5b2132010-08-04 13:50:23 +0100896 intel_encoder = &intel_lvds->base;
Chris Wilson4ef69c72010-09-09 15:14:28 +0100897 encoder = &intel_encoder->base;
Chris Wilsonea5b2132010-08-04 13:50:23 +0100898 connector = &intel_connector->base;
Zhenyu Wangbb8a3562010-03-29 16:40:50 +0800899 drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
Jesse Barnes79e53942008-11-07 14:24:08 -0800900 DRM_MODE_CONNECTOR_LVDS);
901
Chris Wilson4ef69c72010-09-09 15:14:28 +0100902 drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
Jesse Barnes79e53942008-11-07 14:24:08 -0800903 DRM_MODE_ENCODER_LVDS);
904
Chris Wilsondf0e9242010-09-09 16:20:55 +0100905 intel_connector_attach_encoder(intel_connector, intel_encoder);
Eric Anholt21d40d32010-03-25 11:11:14 -0700906 intel_encoder->type = INTEL_OUTPUT_LVDS;
Jesse Barnes79e53942008-11-07 14:24:08 -0800907
Eric Anholt21d40d32010-03-25 11:11:14 -0700908 intel_encoder->clone_mask = (1 << INTEL_LVDS_CLONE_BIT);
909 intel_encoder->crtc_mask = (1 << 1);
Jesse Barnes79e53942008-11-07 14:24:08 -0800910 drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
911 drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
912 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
913 connector->interlace_allowed = false;
914 connector->doublescan_allowed = false;
915
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800916 /* create the scaling mode property */
917 drm_mode_create_scaling_mode_property(dev);
918 /*
919 * the initial panel fitting mode will be FULL_SCREEN.
920 */
Jesse Barnes79e53942008-11-07 14:24:08 -0800921
Zhenyu Wangbb8a3562010-03-29 16:40:50 +0800922 drm_connector_attach_property(&intel_connector->base,
Zhao Yakui3fbe18d2009-06-22 15:31:25 +0800923 dev->mode_config.scaling_mode_property,
Jesse Barnesdd1ea372010-06-24 11:05:10 -0700924 DRM_MODE_SCALE_ASPECT);
Chris Wilsonea5b2132010-08-04 13:50:23 +0100925 intel_lvds->fitting_mode = DRM_MODE_SCALE_ASPECT;
Jesse Barnes79e53942008-11-07 14:24:08 -0800926 /*
927 * LVDS discovery:
928 * 1) check for EDID on DDC
929 * 2) check for VBT data
930 * 3) check to see if LVDS is already on
931 * if none of the above, no panel
932 * 4) make sure lid is open
933 * if closed, act like it's not there for now
934 */
935
Jesse Barnes79e53942008-11-07 14:24:08 -0800936 /*
937 * Attempt to get the fixed panel mode from DDC. Assume that the
938 * preferred mode is the right one.
939 */
Chris Wilson219adae2010-09-16 23:05:10 +0100940 intel_lvds->edid = drm_get_edid(connector,
Chris Wilson270eea02010-09-24 01:15:02 +0100941 &dev_priv->gmbus[pin].adapter);
Chris Wilson788319d2010-09-12 17:34:41 +0100942
Chris Wilson219adae2010-09-16 23:05:10 +0100943 if (!intel_lvds->edid) {
Chris Wilson788319d2010-09-12 17:34:41 +0100944 /* Didn't get an EDID, so
945 * Set wide sync ranges so we get all modes
946 * handed to valid_mode for checking
947 */
948 connector->display_info.min_vfreq = 0;
949 connector->display_info.max_vfreq = 200;
950 connector->display_info.min_hfreq = 0;
951 connector->display_info.max_hfreq = 200;
952 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800953
954 list_for_each_entry(scan, &connector->probed_modes, head) {
Jesse Barnes79e53942008-11-07 14:24:08 -0800955 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
Chris Wilson788319d2010-09-12 17:34:41 +0100956 intel_lvds->fixed_mode =
Jesse Barnes79e53942008-11-07 14:24:08 -0800957 drm_mode_duplicate(dev, scan);
Chris Wilson788319d2010-09-12 17:34:41 +0100958 intel_find_lvds_downclock(dev,
959 intel_lvds->fixed_mode,
960 connector);
Paul Collins565dcd42009-02-04 23:05:41 +1300961 goto out;
Jesse Barnes79e53942008-11-07 14:24:08 -0800962 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800963 }
964
965 /* Failed to get EDID, what about VBT? */
Ma Ling88631702009-05-13 11:19:55 +0800966 if (dev_priv->lfp_lvds_vbt_mode) {
Chris Wilson788319d2010-09-12 17:34:41 +0100967 intel_lvds->fixed_mode =
Ma Ling88631702009-05-13 11:19:55 +0800968 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
Chris Wilson788319d2010-09-12 17:34:41 +0100969 if (intel_lvds->fixed_mode) {
970 intel_lvds->fixed_mode->type |=
Jesse Barnese285f3c2009-01-14 10:53:36 -0800971 DRM_MODE_TYPE_PREFERRED;
Jesse Barnese285f3c2009-01-14 10:53:36 -0800972 goto out;
973 }
Jesse Barnes79e53942008-11-07 14:24:08 -0800974 }
975
976 /*
977 * If we didn't get EDID, try checking if the panel is already turned
978 * on. If so, assume that whatever is currently programmed is the
979 * correct mode.
980 */
Zhenyu Wang541998a2009-06-05 15:38:44 +0800981
Adam Jacksonf2b115e2009-12-03 17:14:42 -0500982 /* Ironlake: FIXME if still fail, not try pipe mode now */
Eric Anholtc619eed2010-01-28 16:45:52 -0800983 if (HAS_PCH_SPLIT(dev))
Zhenyu Wang541998a2009-06-05 15:38:44 +0800984 goto failed;
985
Jesse Barnes79e53942008-11-07 14:24:08 -0800986 lvds = I915_READ(LVDS);
987 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
Chris Wilsonf875c152010-09-09 15:44:14 +0100988 crtc = intel_get_crtc_for_pipe(dev, pipe);
Jesse Barnes79e53942008-11-07 14:24:08 -0800989
990 if (crtc && (lvds & LVDS_PORT_EN)) {
Chris Wilson788319d2010-09-12 17:34:41 +0100991 intel_lvds->fixed_mode = intel_crtc_mode_get(dev, crtc);
992 if (intel_lvds->fixed_mode) {
993 intel_lvds->fixed_mode->type |=
Jesse Barnes79e53942008-11-07 14:24:08 -0800994 DRM_MODE_TYPE_PREFERRED;
Paul Collins565dcd42009-02-04 23:05:41 +1300995 goto out;
Jesse Barnes79e53942008-11-07 14:24:08 -0800996 }
997 }
998
999 /* If we still don't have a mode after all that, give up. */
Chris Wilson788319d2010-09-12 17:34:41 +01001000 if (!intel_lvds->fixed_mode)
Jesse Barnes79e53942008-11-07 14:24:08 -08001001 goto failed;
1002
Jesse Barnes79e53942008-11-07 14:24:08 -08001003out:
Eric Anholtc619eed2010-01-28 16:45:52 -08001004 if (HAS_PCH_SPLIT(dev)) {
Zhenyu Wang541998a2009-06-05 15:38:44 +08001005 u32 pwm;
1006 /* make sure PWM is enabled */
1007 pwm = I915_READ(BLC_PWM_CPU_CTL2);
1008 pwm |= (PWM_ENABLE | PWM_PIPE_B);
1009 I915_WRITE(BLC_PWM_CPU_CTL2, pwm);
1010
1011 pwm = I915_READ(BLC_PWM_PCH_CTL1);
1012 pwm |= PWM_PCH_ENABLE;
1013 I915_WRITE(BLC_PWM_PCH_CTL1, pwm);
1014 }
Jesse Barnesc1c7af62009-09-10 15:28:03 -07001015 dev_priv->lid_notifier.notifier_call = intel_lid_notify;
1016 if (acpi_lid_notifier_register(&dev_priv->lid_notifier)) {
Zhao Yakui28c97732009-10-09 11:39:41 +08001017 DRM_DEBUG_KMS("lid notifier registration failed\n");
Jesse Barnesc1c7af62009-09-10 15:28:03 -07001018 dev_priv->lid_notifier.notifier_call = NULL;
1019 }
Zhao Yakuia2565372009-12-11 09:26:11 +08001020 /* keep the LVDS connector */
1021 dev_priv->int_lvds_connector = connector;
Jesse Barnes79e53942008-11-07 14:24:08 -08001022 drm_sysfs_connector_add(connector);
1023 return;
1024
1025failed:
Zhao Yakui8a4c47f2009-07-20 13:48:04 +08001026 DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
Jesse Barnes79e53942008-11-07 14:24:08 -08001027 drm_connector_cleanup(connector);
Shaohua Li1991bdf2009-11-17 17:19:23 +08001028 drm_encoder_cleanup(encoder);
Chris Wilsonea5b2132010-08-04 13:50:23 +01001029 kfree(intel_lvds);
Zhenyu Wangbb8a3562010-03-29 16:40:50 +08001030 kfree(intel_connector);
Jesse Barnes79e53942008-11-07 14:24:08 -08001031}