9cd81badd60146120c2e799012f6f646167f1d1a
[pandora-kernel.git] / drivers / gpu / drm / i915 / intel_hdmi.c
1 /*
2  * Copyright 2006 Dave Airlie <airlied@linux.ie>
3  * Copyright © 2006-2009 Intel Corporation
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  *      Jesse Barnes <jesse.barnes@intel.com>
27  */
28
29 #include <linux/i2c.h>
30 #include <linux/slab.h>
31 #include <linux/delay.h>
32 #include "drmP.h"
33 #include "drm.h"
34 #include "drm_crtc.h"
35 #include "drm_edid.h"
36 #include "intel_drv.h"
37 #include "i915_drm.h"
38 #include "i915_drv.h"
39
40 struct intel_hdmi {
41         struct intel_encoder base;
42         u32 sdvox_reg;
43         int ddc_bus;
44         uint32_t color_range;
45         bool has_hdmi_sink;
46         bool has_audio;
47         int force_audio;
48         void (*write_infoframe)(struct drm_encoder *encoder,
49                                 struct dip_infoframe *frame);
50 };
51
52 static struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
53 {
54         return container_of(encoder, struct intel_hdmi, base.base);
55 }
56
57 static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
58 {
59         return container_of(intel_attached_encoder(connector),
60                             struct intel_hdmi, base);
61 }
62
63 void intel_dip_infoframe_csum(struct dip_infoframe *frame)
64 {
65         uint8_t *data = (uint8_t *)frame;
66         uint8_t sum = 0;
67         unsigned i;
68
69         frame->checksum = 0;
70         frame->ecc = 0;
71
72         for (i = 0; i < frame->len + DIP_HEADER_SIZE; i++)
73                 sum += data[i];
74
75         frame->checksum = 0x100 - sum;
76 }
77
78 static u32 intel_infoframe_index(struct dip_infoframe *frame)
79 {
80         u32 flags = 0;
81
82         switch (frame->type) {
83         case DIP_TYPE_AVI:
84                 flags |= VIDEO_DIP_SELECT_AVI;
85                 break;
86         case DIP_TYPE_SPD:
87                 flags |= VIDEO_DIP_SELECT_SPD;
88                 break;
89         default:
90                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
91                 break;
92         }
93
94         return flags;
95 }
96
97 static u32 intel_infoframe_flags(struct dip_infoframe *frame)
98 {
99         u32 flags = 0;
100
101         switch (frame->type) {
102         case DIP_TYPE_AVI:
103                 flags |= VIDEO_DIP_ENABLE_AVI | VIDEO_DIP_FREQ_VSYNC;
104                 break;
105         case DIP_TYPE_SPD:
106                 flags |= VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_FREQ_VSYNC;
107                 break;
108         default:
109                 DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);
110                 break;
111         }
112
113         return flags;
114 }
115
116 static void i9xx_write_infoframe(struct drm_encoder *encoder,
117                                  struct dip_infoframe *frame)
118 {
119         uint32_t *data = (uint32_t *)frame;
120         struct drm_device *dev = encoder->dev;
121         struct drm_i915_private *dev_priv = dev->dev_private;
122         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
123         u32 port, flags, val = I915_READ(VIDEO_DIP_CTL);
124         unsigned i, len = DIP_HEADER_SIZE + frame->len;
125
126
127         /* XXX first guess at handling video port, is this corrent? */
128         if (intel_hdmi->sdvox_reg == SDVOB)
129                 port = VIDEO_DIP_PORT_B;
130         else if (intel_hdmi->sdvox_reg == SDVOC)
131                 port = VIDEO_DIP_PORT_C;
132         else
133                 return;
134
135         flags = intel_infoframe_index(frame);
136
137         val &= ~VIDEO_DIP_SELECT_MASK;
138
139         I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
140
141         for (i = 0; i < len; i += 4) {
142                 I915_WRITE(VIDEO_DIP_DATA, *data);
143                 data++;
144         }
145
146         flags |= intel_infoframe_flags(frame);
147
148         I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
149 }
150
151 static void ironlake_write_infoframe(struct drm_encoder *encoder,
152                                      struct dip_infoframe *frame)
153 {
154         uint32_t *data = (uint32_t *)frame;
155         struct drm_device *dev = encoder->dev;
156         struct drm_i915_private *dev_priv = dev->dev_private;
157         struct drm_crtc *crtc = encoder->crtc;
158         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
159         int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);
160         unsigned i, len = DIP_HEADER_SIZE + frame->len;
161         u32 flags, val = I915_READ(reg);
162
163         intel_wait_for_vblank(dev, intel_crtc->pipe);
164
165         flags = intel_infoframe_index(frame);
166
167         val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
168
169         I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
170
171         for (i = 0; i < len; i += 4) {
172                 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
173                 data++;
174         }
175
176         flags |= intel_infoframe_flags(frame);
177
178         I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
179 }
180 static void intel_set_infoframe(struct drm_encoder *encoder,
181                                 struct dip_infoframe *frame)
182 {
183         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
184
185         if (!intel_hdmi->has_hdmi_sink)
186                 return;
187
188         intel_dip_infoframe_csum(frame);
189         intel_hdmi->write_infoframe(encoder, frame);
190 }
191
192 static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
193 {
194         struct dip_infoframe avi_if = {
195                 .type = DIP_TYPE_AVI,
196                 .ver = DIP_VERSION_AVI,
197                 .len = DIP_LEN_AVI,
198         };
199
200         intel_set_infoframe(encoder, &avi_if);
201 }
202
203 static void intel_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
204 {
205         struct dip_infoframe spd_if;
206
207         memset(&spd_if, 0, sizeof(spd_if));
208         spd_if.type = DIP_TYPE_SPD;
209         spd_if.ver = DIP_VERSION_SPD;
210         spd_if.len = DIP_LEN_SPD;
211         strcpy(spd_if.body.spd.vn, "Intel");
212         strcpy(spd_if.body.spd.pd, "Integrated gfx");
213         spd_if.body.spd.sdi = DIP_SPD_PC;
214
215         intel_set_infoframe(encoder, &spd_if);
216 }
217
218 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
219                                 struct drm_display_mode *mode,
220                                 struct drm_display_mode *adjusted_mode)
221 {
222         struct drm_device *dev = encoder->dev;
223         struct drm_i915_private *dev_priv = dev->dev_private;
224         struct drm_crtc *crtc = encoder->crtc;
225         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
226         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
227         u32 sdvox;
228
229         sdvox = SDVO_ENCODING_HDMI | SDVO_BORDER_ENABLE;
230         if (!HAS_PCH_SPLIT(dev))
231                 sdvox |= intel_hdmi->color_range;
232         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
233                 sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
234         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
235                 sdvox |= SDVO_HSYNC_ACTIVE_HIGH;
236
237         if (intel_crtc->bpp > 24)
238                 sdvox |= COLOR_FORMAT_12bpc;
239         else
240                 sdvox |= COLOR_FORMAT_8bpc;
241
242         /* Required on CPT */
243         if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
244                 sdvox |= HDMI_MODE_SELECT;
245
246         if (intel_hdmi->has_audio) {
247                 DRM_DEBUG_DRIVER("Enabling HDMI audio on pipe %c\n",
248                                  pipe_name(intel_crtc->pipe));
249                 sdvox |= SDVO_AUDIO_ENABLE;
250                 sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC;
251                 intel_write_eld(encoder, adjusted_mode);
252         }
253
254         if (HAS_PCH_CPT(dev))
255                 sdvox |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);
256         else if (intel_crtc->pipe == 1)
257                 sdvox |= SDVO_PIPE_B_SELECT;
258
259         I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
260         POSTING_READ(intel_hdmi->sdvox_reg);
261
262         intel_hdmi_set_avi_infoframe(encoder);
263         intel_hdmi_set_spd_infoframe(encoder);
264 }
265
266 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
267 {
268         struct drm_device *dev = encoder->dev;
269         struct drm_i915_private *dev_priv = dev->dev_private;
270         struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
271         u32 temp;
272         u32 enable_bits = SDVO_ENABLE;
273
274         if (intel_hdmi->has_audio)
275                 enable_bits |= SDVO_AUDIO_ENABLE;
276
277         temp = I915_READ(intel_hdmi->sdvox_reg);
278
279         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
280          * we do this anyway which shows more stable in testing.
281          */
282         if (HAS_PCH_SPLIT(dev)) {
283                 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
284                 POSTING_READ(intel_hdmi->sdvox_reg);
285         }
286
287         if (mode != DRM_MODE_DPMS_ON) {
288                 temp &= ~enable_bits;
289         } else {
290                 temp |= enable_bits;
291         }
292
293         I915_WRITE(intel_hdmi->sdvox_reg, temp);
294         POSTING_READ(intel_hdmi->sdvox_reg);
295
296         /* HW workaround, need to write this twice for issue that may result
297          * in first write getting masked.
298          */
299         if (HAS_PCH_SPLIT(dev)) {
300                 I915_WRITE(intel_hdmi->sdvox_reg, temp);
301                 POSTING_READ(intel_hdmi->sdvox_reg);
302         }
303 }
304
305 static int intel_hdmi_mode_valid(struct drm_connector *connector,
306                                  struct drm_display_mode *mode)
307 {
308         if (mode->clock > 165000)
309                 return MODE_CLOCK_HIGH;
310         if (mode->clock < 20000)
311                 return MODE_CLOCK_LOW;
312
313         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
314                 return MODE_NO_DBLESCAN;
315
316         return MODE_OK;
317 }
318
319 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
320                                   struct drm_display_mode *mode,
321                                   struct drm_display_mode *adjusted_mode)
322 {
323         return true;
324 }
325
326 static enum drm_connector_status
327 intel_hdmi_detect(struct drm_connector *connector, bool force)
328 {
329         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
330         struct drm_i915_private *dev_priv = connector->dev->dev_private;
331         struct edid *edid;
332         enum drm_connector_status status = connector_status_disconnected;
333
334         intel_hdmi->has_hdmi_sink = false;
335         intel_hdmi->has_audio = false;
336         edid = drm_get_edid(connector,
337                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
338
339         if (edid) {
340                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
341                         status = connector_status_connected;
342                         intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
343                         intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
344                 }
345                 connector->display_info.raw_edid = NULL;
346                 kfree(edid);
347         }
348
349         if (status == connector_status_connected) {
350                 if (intel_hdmi->force_audio)
351                         intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
352         }
353
354         return status;
355 }
356
357 static int intel_hdmi_get_modes(struct drm_connector *connector)
358 {
359         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
360         struct drm_i915_private *dev_priv = connector->dev->dev_private;
361
362         /* We should parse the EDID data and find out if it's an HDMI sink so
363          * we can send audio to it.
364          */
365
366         return intel_ddc_get_modes(connector,
367                                    &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
368 }
369
370 static bool
371 intel_hdmi_detect_audio(struct drm_connector *connector)
372 {
373         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
374         struct drm_i915_private *dev_priv = connector->dev->dev_private;
375         struct edid *edid;
376         bool has_audio = false;
377
378         edid = drm_get_edid(connector,
379                             &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
380         if (edid) {
381                 if (edid->input & DRM_EDID_INPUT_DIGITAL)
382                         has_audio = drm_detect_monitor_audio(edid);
383
384                 connector->display_info.raw_edid = NULL;
385                 kfree(edid);
386         }
387
388         return has_audio;
389 }
390
391 static int
392 intel_hdmi_set_property(struct drm_connector *connector,
393                       struct drm_property *property,
394                       uint64_t val)
395 {
396         struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
397         struct drm_i915_private *dev_priv = connector->dev->dev_private;
398         int ret;
399
400         ret = drm_connector_property_set_value(connector, property, val);
401         if (ret)
402                 return ret;
403
404         if (property == dev_priv->force_audio_property) {
405                 int i = val;
406                 bool has_audio;
407
408                 if (i == intel_hdmi->force_audio)
409                         return 0;
410
411                 intel_hdmi->force_audio = i;
412
413                 if (i == 0)
414                         has_audio = intel_hdmi_detect_audio(connector);
415                 else
416                         has_audio = i > 0;
417
418                 if (has_audio == intel_hdmi->has_audio)
419                         return 0;
420
421                 intel_hdmi->has_audio = has_audio;
422                 goto done;
423         }
424
425         if (property == dev_priv->broadcast_rgb_property) {
426                 if (val == !!intel_hdmi->color_range)
427                         return 0;
428
429                 intel_hdmi->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
430                 goto done;
431         }
432
433         return -EINVAL;
434
435 done:
436         if (intel_hdmi->base.base.crtc) {
437                 struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
438                 drm_crtc_helper_set_mode(crtc, &crtc->mode,
439                                          crtc->x, crtc->y,
440                                          crtc->fb);
441         }
442
443         return 0;
444 }
445
446 static void intel_hdmi_destroy(struct drm_connector *connector)
447 {
448         drm_sysfs_connector_remove(connector);
449         drm_connector_cleanup(connector);
450         kfree(connector);
451 }
452
453 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
454         .dpms = intel_hdmi_dpms,
455         .mode_fixup = intel_hdmi_mode_fixup,
456         .prepare = intel_encoder_prepare,
457         .mode_set = intel_hdmi_mode_set,
458         .commit = intel_encoder_commit,
459 };
460
461 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
462         .dpms = drm_helper_connector_dpms,
463         .detect = intel_hdmi_detect,
464         .fill_modes = drm_helper_probe_single_connector_modes,
465         .set_property = intel_hdmi_set_property,
466         .destroy = intel_hdmi_destroy,
467 };
468
469 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
470         .get_modes = intel_hdmi_get_modes,
471         .mode_valid = intel_hdmi_mode_valid,
472         .best_encoder = intel_best_encoder,
473 };
474
475 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
476         .destroy = intel_encoder_destroy,
477 };
478
479 static void
480 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
481 {
482         intel_attach_force_audio_property(connector);
483         intel_attach_broadcast_rgb_property(connector);
484 }
485
486 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
487 {
488         struct drm_i915_private *dev_priv = dev->dev_private;
489         struct drm_connector *connector;
490         struct intel_encoder *intel_encoder;
491         struct intel_connector *intel_connector;
492         struct intel_hdmi *intel_hdmi;
493         int i;
494
495         intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
496         if (!intel_hdmi)
497                 return;
498
499         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
500         if (!intel_connector) {
501                 kfree(intel_hdmi);
502                 return;
503         }
504
505         intel_encoder = &intel_hdmi->base;
506         drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
507                          DRM_MODE_ENCODER_TMDS);
508
509         connector = &intel_connector->base;
510         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
511                            DRM_MODE_CONNECTOR_HDMIA);
512         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
513
514         intel_encoder->type = INTEL_OUTPUT_HDMI;
515
516         connector->polled = DRM_CONNECTOR_POLL_HPD;
517         connector->interlace_allowed = 0;
518         connector->doublescan_allowed = 0;
519         intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
520
521         /* Set up the DDC bus. */
522         if (sdvox_reg == SDVOB) {
523                 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
524                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
525                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
526         } else if (sdvox_reg == SDVOC) {
527                 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
528                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
529                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
530         } else if (sdvox_reg == HDMIB) {
531                 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
532                 intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
533                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
534         } else if (sdvox_reg == HDMIC) {
535                 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
536                 intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
537                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
538         } else if (sdvox_reg == HDMID) {
539                 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
540                 intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
541                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
542         }
543
544         intel_hdmi->sdvox_reg = sdvox_reg;
545
546         if (!HAS_PCH_SPLIT(dev)) {
547                 intel_hdmi->write_infoframe = i9xx_write_infoframe;
548                 I915_WRITE(VIDEO_DIP_CTL, 0);
549         } else {
550                 intel_hdmi->write_infoframe = ironlake_write_infoframe;
551                 for_each_pipe(i)
552                         I915_WRITE(TVIDEO_DIP_CTL(i), 0);
553         }
554
555         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
556
557         intel_hdmi_add_properties(intel_hdmi, connector);
558
559         intel_connector_attach_encoder(intel_connector, intel_encoder);
560         drm_sysfs_connector_add(connector);
561
562         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
563          * 0xd.  Failure to do so will result in spurious interrupts being
564          * generated on the port when a cable is not attached.
565          */
566         if (IS_G4X(dev) && !IS_GM45(dev)) {
567                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
568                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
569         }
570 }