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
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.
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>
36 #include "intel_drv.h"
40 struct intel_hdmi_priv {
45 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
46 struct drm_display_mode *mode,
47 struct drm_display_mode *adjusted_mode)
49 struct drm_device *dev = encoder->dev;
50 struct drm_i915_private *dev_priv = dev->dev_private;
51 struct drm_crtc *crtc = encoder->crtc;
52 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
53 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
54 struct intel_hdmi_priv *hdmi_priv = intel_encoder->dev_priv;
57 sdvox = SDVO_ENCODING_HDMI |
59 SDVO_VSYNC_ACTIVE_HIGH |
60 SDVO_HSYNC_ACTIVE_HIGH;
62 if (hdmi_priv->has_hdmi_sink)
63 sdvox |= SDVO_AUDIO_ENABLE;
65 if (intel_crtc->pipe == 1) {
67 sdvox |= PORT_TRANS_B_SEL_CPT;
69 sdvox |= SDVO_PIPE_B_SELECT;
72 I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
73 POSTING_READ(hdmi_priv->sdvox_reg);
76 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
78 struct drm_device *dev = encoder->dev;
79 struct drm_i915_private *dev_priv = dev->dev_private;
80 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
81 struct intel_hdmi_priv *hdmi_priv = intel_encoder->dev_priv;
84 temp = I915_READ(hdmi_priv->sdvox_reg);
86 /* HW workaround, need to toggle enable bit off and on for 12bpc, but
87 * we do this anyway which shows more stable in testing.
89 if (HAS_PCH_SPLIT(dev)) {
90 I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
91 POSTING_READ(hdmi_priv->sdvox_reg);
94 if (mode != DRM_MODE_DPMS_ON) {
100 I915_WRITE(hdmi_priv->sdvox_reg, temp);
101 POSTING_READ(hdmi_priv->sdvox_reg);
103 /* HW workaround, need to write this twice for issue that may result
104 * in first write getting masked.
106 if (HAS_PCH_SPLIT(dev)) {
107 I915_WRITE(hdmi_priv->sdvox_reg, temp);
108 POSTING_READ(hdmi_priv->sdvox_reg);
112 static int intel_hdmi_mode_valid(struct drm_connector *connector,
113 struct drm_display_mode *mode)
115 if (mode->clock > 165000)
116 return MODE_CLOCK_HIGH;
117 if (mode->clock < 20000)
118 return MODE_CLOCK_HIGH;
120 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
121 return MODE_NO_DBLESCAN;
126 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
127 struct drm_display_mode *mode,
128 struct drm_display_mode *adjusted_mode)
133 static enum drm_connector_status
134 intel_hdmi_detect(struct drm_connector *connector)
136 struct drm_encoder *encoder = intel_attached_encoder(connector);
137 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
138 struct intel_hdmi_priv *hdmi_priv = intel_encoder->dev_priv;
139 struct edid *edid = NULL;
140 enum drm_connector_status status = connector_status_disconnected;
142 hdmi_priv->has_hdmi_sink = false;
143 edid = drm_get_edid(connector,
144 intel_encoder->ddc_bus);
147 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
148 status = connector_status_connected;
149 hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
151 connector->display_info.raw_edid = NULL;
158 static int intel_hdmi_get_modes(struct drm_connector *connector)
160 struct drm_encoder *encoder = intel_attached_encoder(connector);
161 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
163 /* We should parse the EDID data and find out if it's an HDMI sink so
164 * we can send audio to it.
167 return intel_ddc_get_modes(connector, intel_encoder->ddc_bus);
170 static void intel_hdmi_destroy(struct drm_connector *connector)
172 drm_sysfs_connector_remove(connector);
173 drm_connector_cleanup(connector);
177 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
178 .dpms = intel_hdmi_dpms,
179 .mode_fixup = intel_hdmi_mode_fixup,
180 .prepare = intel_encoder_prepare,
181 .mode_set = intel_hdmi_mode_set,
182 .commit = intel_encoder_commit,
185 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
186 .dpms = drm_helper_connector_dpms,
187 .detect = intel_hdmi_detect,
188 .fill_modes = drm_helper_probe_single_connector_modes,
189 .destroy = intel_hdmi_destroy,
192 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
193 .get_modes = intel_hdmi_get_modes,
194 .mode_valid = intel_hdmi_mode_valid,
195 .best_encoder = intel_attached_encoder,
198 static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
200 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
202 if (intel_encoder->i2c_bus)
203 intel_i2c_destroy(intel_encoder->i2c_bus);
204 drm_encoder_cleanup(encoder);
205 kfree(intel_encoder);
208 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
209 .destroy = intel_hdmi_enc_destroy,
212 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
214 struct drm_i915_private *dev_priv = dev->dev_private;
215 struct drm_connector *connector;
216 struct intel_encoder *intel_encoder;
217 struct intel_connector *intel_connector;
218 struct intel_hdmi_priv *hdmi_priv;
220 intel_encoder = kcalloc(sizeof(struct intel_encoder) +
221 sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
225 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
226 if (!intel_connector) {
227 kfree(intel_encoder);
231 hdmi_priv = (struct intel_hdmi_priv *)(intel_encoder + 1);
233 connector = &intel_connector->base;
234 drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
235 DRM_MODE_CONNECTOR_HDMIA);
236 drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
238 intel_encoder->type = INTEL_OUTPUT_HDMI;
240 connector->polled = DRM_CONNECTOR_POLL_HPD;
241 connector->interlace_allowed = 0;
242 connector->doublescan_allowed = 0;
243 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
245 /* Set up the DDC bus. */
246 if (sdvox_reg == SDVOB) {
247 intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
248 intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
249 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
250 } else if (sdvox_reg == SDVOC) {
251 intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
252 intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
253 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
254 } else if (sdvox_reg == HDMIB) {
255 intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
256 intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
258 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
259 } else if (sdvox_reg == HDMIC) {
260 intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
261 intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
263 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
264 } else if (sdvox_reg == HDMID) {
265 intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
266 intel_encoder->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
268 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
270 if (!intel_encoder->ddc_bus)
273 hdmi_priv->sdvox_reg = sdvox_reg;
274 intel_encoder->dev_priv = hdmi_priv;
276 drm_encoder_init(dev, &intel_encoder->enc, &intel_hdmi_enc_funcs,
277 DRM_MODE_ENCODER_TMDS);
278 drm_encoder_helper_add(&intel_encoder->enc, &intel_hdmi_helper_funcs);
280 drm_mode_connector_attach_encoder(&intel_connector->base,
281 &intel_encoder->enc);
282 drm_sysfs_connector_add(connector);
284 /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
285 * 0xd. Failure to do so will result in spurious interrupts being
286 * generated on the port when a cable is not attached.
288 if (IS_G4X(dev) && !IS_GM45(dev)) {
289 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
290 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
296 drm_connector_cleanup(connector);
297 kfree(intel_encoder);
298 kfree(intel_connector);