OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / gpu / drm / i915 / intel_hdmi.c
blob9cd81badd60146120c2e799012f6f646167f1d1a
1 /*
2 * Copyright 2006 Dave Airlie <airlied@linux.ie>
3 * Copyright © 2006-2009 Intel Corporation
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:
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.
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.
24 * Authors:
25 * Eric Anholt <eric@anholt.net>
26 * Jesse Barnes <jesse.barnes@intel.com>
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"
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);
52 static struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
54 return container_of(encoder, struct intel_hdmi, base.base);
57 static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
59 return container_of(intel_attached_encoder(connector),
60 struct intel_hdmi, base);
63 void intel_dip_infoframe_csum(struct dip_infoframe *frame)
65 uint8_t *data = (uint8_t *)frame;
66 uint8_t sum = 0;
67 unsigned i;
69 frame->checksum = 0;
70 frame->ecc = 0;
72 for (i = 0; i < frame->len + DIP_HEADER_SIZE; i++)
73 sum += data[i];
75 frame->checksum = 0x100 - sum;
78 static u32 intel_infoframe_index(struct dip_infoframe *frame)
80 u32 flags = 0;
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;
94 return flags;
97 static u32 intel_infoframe_flags(struct dip_infoframe *frame)
99 u32 flags = 0;
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;
113 return flags;
116 static void i9xx_write_infoframe(struct drm_encoder *encoder,
117 struct dip_infoframe *frame)
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;
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;
135 flags = intel_infoframe_index(frame);
137 val &= ~VIDEO_DIP_SELECT_MASK;
139 I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
141 for (i = 0; i < len; i += 4) {
142 I915_WRITE(VIDEO_DIP_DATA, *data);
143 data++;
146 flags |= intel_infoframe_flags(frame);
148 I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);
151 static void ironlake_write_infoframe(struct drm_encoder *encoder,
152 struct dip_infoframe *frame)
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);
163 intel_wait_for_vblank(dev, intel_crtc->pipe);
165 flags = intel_infoframe_index(frame);
167 val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */
169 I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
171 for (i = 0; i < len; i += 4) {
172 I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);
173 data++;
176 flags |= intel_infoframe_flags(frame);
178 I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);
180 static void intel_set_infoframe(struct drm_encoder *encoder,
181 struct dip_infoframe *frame)
183 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
185 if (!intel_hdmi->has_hdmi_sink)
186 return;
188 intel_dip_infoframe_csum(frame);
189 intel_hdmi->write_infoframe(encoder, frame);
192 static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
194 struct dip_infoframe avi_if = {
195 .type = DIP_TYPE_AVI,
196 .ver = DIP_VERSION_AVI,
197 .len = DIP_LEN_AVI,
200 intel_set_infoframe(encoder, &avi_if);
203 static void intel_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
205 struct dip_infoframe spd_if;
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;
215 intel_set_infoframe(encoder, &spd_if);
218 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
219 struct drm_display_mode *mode,
220 struct drm_display_mode *adjusted_mode)
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;
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;
237 if (intel_crtc->bpp > 24)
238 sdvox |= COLOR_FORMAT_12bpc;
239 else
240 sdvox |= COLOR_FORMAT_8bpc;
242 /* Required on CPT */
243 if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
244 sdvox |= HDMI_MODE_SELECT;
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);
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;
259 I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
260 POSTING_READ(intel_hdmi->sdvox_reg);
262 intel_hdmi_set_avi_infoframe(encoder);
263 intel_hdmi_set_spd_infoframe(encoder);
266 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
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;
274 if (intel_hdmi->has_audio)
275 enable_bits |= SDVO_AUDIO_ENABLE;
277 temp = I915_READ(intel_hdmi->sdvox_reg);
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.
282 if (HAS_PCH_SPLIT(dev)) {
283 I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
284 POSTING_READ(intel_hdmi->sdvox_reg);
287 if (mode != DRM_MODE_DPMS_ON) {
288 temp &= ~enable_bits;
289 } else {
290 temp |= enable_bits;
293 I915_WRITE(intel_hdmi->sdvox_reg, temp);
294 POSTING_READ(intel_hdmi->sdvox_reg);
296 /* HW workaround, need to write this twice for issue that may result
297 * in first write getting masked.
299 if (HAS_PCH_SPLIT(dev)) {
300 I915_WRITE(intel_hdmi->sdvox_reg, temp);
301 POSTING_READ(intel_hdmi->sdvox_reg);
305 static int intel_hdmi_mode_valid(struct drm_connector *connector,
306 struct drm_display_mode *mode)
308 if (mode->clock > 165000)
309 return MODE_CLOCK_HIGH;
310 if (mode->clock < 20000)
311 return MODE_CLOCK_LOW;
313 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
314 return MODE_NO_DBLESCAN;
316 return MODE_OK;
319 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
320 struct drm_display_mode *mode,
321 struct drm_display_mode *adjusted_mode)
323 return true;
326 static enum drm_connector_status
327 intel_hdmi_detect(struct drm_connector *connector, bool force)
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;
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);
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);
345 connector->display_info.raw_edid = NULL;
346 kfree(edid);
349 if (status == connector_status_connected) {
350 if (intel_hdmi->force_audio)
351 intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
354 return status;
357 static int intel_hdmi_get_modes(struct drm_connector *connector)
359 struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
360 struct drm_i915_private *dev_priv = connector->dev->dev_private;
362 /* We should parse the EDID data and find out if it's an HDMI sink so
363 * we can send audio to it.
366 return intel_ddc_get_modes(connector,
367 &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
370 static bool
371 intel_hdmi_detect_audio(struct drm_connector *connector)
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;
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);
384 connector->display_info.raw_edid = NULL;
385 kfree(edid);
388 return has_audio;
391 static int
392 intel_hdmi_set_property(struct drm_connector *connector,
393 struct drm_property *property,
394 uint64_t val)
396 struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
397 struct drm_i915_private *dev_priv = connector->dev->dev_private;
398 int ret;
400 ret = drm_connector_property_set_value(connector, property, val);
401 if (ret)
402 return ret;
404 if (property == dev_priv->force_audio_property) {
405 int i = val;
406 bool has_audio;
408 if (i == intel_hdmi->force_audio)
409 return 0;
411 intel_hdmi->force_audio = i;
413 if (i == 0)
414 has_audio = intel_hdmi_detect_audio(connector);
415 else
416 has_audio = i > 0;
418 if (has_audio == intel_hdmi->has_audio)
419 return 0;
421 intel_hdmi->has_audio = has_audio;
422 goto done;
425 if (property == dev_priv->broadcast_rgb_property) {
426 if (val == !!intel_hdmi->color_range)
427 return 0;
429 intel_hdmi->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
430 goto done;
433 return -EINVAL;
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);
443 return 0;
446 static void intel_hdmi_destroy(struct drm_connector *connector)
448 drm_sysfs_connector_remove(connector);
449 drm_connector_cleanup(connector);
450 kfree(connector);
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,
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,
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,
475 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
476 .destroy = intel_encoder_destroy,
479 static void
480 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
482 intel_attach_force_audio_property(connector);
483 intel_attach_broadcast_rgb_property(connector);
486 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
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;
495 intel_hdmi = kzalloc(sizeof(struct intel_hdmi), GFP_KERNEL);
496 if (!intel_hdmi)
497 return;
499 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
500 if (!intel_connector) {
501 kfree(intel_hdmi);
502 return;
505 intel_encoder = &intel_hdmi->base;
506 drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
507 DRM_MODE_ENCODER_TMDS);
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);
514 intel_encoder->type = INTEL_OUTPUT_HDMI;
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);
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;
544 intel_hdmi->sdvox_reg = sdvox_reg;
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);
555 drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
557 intel_hdmi_add_properties(intel_hdmi, connector);
559 intel_connector_attach_encoder(intel_connector, intel_encoder);
560 drm_sysfs_connector_add(connector);
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.
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);