include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-2.6.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_priv {
41         u32 sdvox_reg;
42         u32 save_SDVOX;
43         bool has_hdmi_sink;
44 };
45
46 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
47                                 struct drm_display_mode *mode,
48                                 struct drm_display_mode *adjusted_mode)
49 {
50         struct drm_device *dev = encoder->dev;
51         struct drm_i915_private *dev_priv = dev->dev_private;
52         struct drm_crtc *crtc = encoder->crtc;
53         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
54         struct intel_output *intel_output = enc_to_intel_output(encoder);
55         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
56         u32 sdvox;
57
58         sdvox = SDVO_ENCODING_HDMI |
59                 SDVO_BORDER_ENABLE |
60                 SDVO_VSYNC_ACTIVE_HIGH |
61                 SDVO_HSYNC_ACTIVE_HIGH;
62
63         if (hdmi_priv->has_hdmi_sink)
64                 sdvox |= SDVO_AUDIO_ENABLE;
65
66         if (intel_crtc->pipe == 1)
67                 sdvox |= SDVO_PIPE_B_SELECT;
68
69         I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
70         POSTING_READ(hdmi_priv->sdvox_reg);
71 }
72
73 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
74 {
75         struct drm_device *dev = encoder->dev;
76         struct drm_i915_private *dev_priv = dev->dev_private;
77         struct intel_output *intel_output = enc_to_intel_output(encoder);
78         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
79         u32 temp;
80
81         temp = I915_READ(hdmi_priv->sdvox_reg);
82
83         /* HW workaround, need to toggle enable bit off and on for 12bpc, but
84          * we do this anyway which shows more stable in testing.
85          */
86         if (HAS_PCH_SPLIT(dev)) {
87                 I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
88                 POSTING_READ(hdmi_priv->sdvox_reg);
89         }
90
91         if (mode != DRM_MODE_DPMS_ON) {
92                 temp &= ~SDVO_ENABLE;
93         } else {
94                 temp |= SDVO_ENABLE;
95         }
96
97         I915_WRITE(hdmi_priv->sdvox_reg, temp);
98         POSTING_READ(hdmi_priv->sdvox_reg);
99
100         /* HW workaround, need to write this twice for issue that may result
101          * in first write getting masked.
102          */
103         if (HAS_PCH_SPLIT(dev)) {
104                 I915_WRITE(hdmi_priv->sdvox_reg, temp);
105                 POSTING_READ(hdmi_priv->sdvox_reg);
106         }
107 }
108
109 static void intel_hdmi_save(struct drm_connector *connector)
110 {
111         struct drm_device *dev = connector->dev;
112         struct drm_i915_private *dev_priv = dev->dev_private;
113         struct intel_output *intel_output = to_intel_output(connector);
114         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
115
116         hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
117 }
118
119 static void intel_hdmi_restore(struct drm_connector *connector)
120 {
121         struct drm_device *dev = connector->dev;
122         struct drm_i915_private *dev_priv = dev->dev_private;
123         struct intel_output *intel_output = to_intel_output(connector);
124         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
125
126         I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
127         POSTING_READ(hdmi_priv->sdvox_reg);
128 }
129
130 static int intel_hdmi_mode_valid(struct drm_connector *connector,
131                                  struct drm_display_mode *mode)
132 {
133         if (mode->clock > 165000)
134                 return MODE_CLOCK_HIGH;
135         if (mode->clock < 20000)
136                 return MODE_CLOCK_HIGH;
137
138         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
139                 return MODE_NO_DBLESCAN;
140
141         return MODE_OK;
142 }
143
144 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
145                                   struct drm_display_mode *mode,
146                                   struct drm_display_mode *adjusted_mode)
147 {
148         return true;
149 }
150
151 static enum drm_connector_status
152 intel_hdmi_detect(struct drm_connector *connector)
153 {
154         struct intel_output *intel_output = to_intel_output(connector);
155         struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
156         struct edid *edid = NULL;
157         enum drm_connector_status status = connector_status_disconnected;
158
159         hdmi_priv->has_hdmi_sink = false;
160         edid = drm_get_edid(&intel_output->base,
161                             intel_output->ddc_bus);
162
163         if (edid) {
164                 if (edid->input & DRM_EDID_INPUT_DIGITAL) {
165                         status = connector_status_connected;
166                         hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
167                 }
168                 intel_output->base.display_info.raw_edid = NULL;
169                 kfree(edid);
170         }
171
172         return status;
173 }
174
175 static int intel_hdmi_get_modes(struct drm_connector *connector)
176 {
177         struct intel_output *intel_output = to_intel_output(connector);
178
179         /* We should parse the EDID data and find out if it's an HDMI sink so
180          * we can send audio to it.
181          */
182
183         return intel_ddc_get_modes(intel_output);
184 }
185
186 static void intel_hdmi_destroy(struct drm_connector *connector)
187 {
188         struct intel_output *intel_output = to_intel_output(connector);
189
190         if (intel_output->i2c_bus)
191                 intel_i2c_destroy(intel_output->i2c_bus);
192         drm_sysfs_connector_remove(connector);
193         drm_connector_cleanup(connector);
194         kfree(intel_output);
195 }
196
197 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
198         .dpms = intel_hdmi_dpms,
199         .mode_fixup = intel_hdmi_mode_fixup,
200         .prepare = intel_encoder_prepare,
201         .mode_set = intel_hdmi_mode_set,
202         .commit = intel_encoder_commit,
203 };
204
205 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
206         .dpms = drm_helper_connector_dpms,
207         .save = intel_hdmi_save,
208         .restore = intel_hdmi_restore,
209         .detect = intel_hdmi_detect,
210         .fill_modes = drm_helper_probe_single_connector_modes,
211         .destroy = intel_hdmi_destroy,
212 };
213
214 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
215         .get_modes = intel_hdmi_get_modes,
216         .mode_valid = intel_hdmi_mode_valid,
217         .best_encoder = intel_best_encoder,
218 };
219
220 static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
221 {
222         drm_encoder_cleanup(encoder);
223 }
224
225 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
226         .destroy = intel_hdmi_enc_destroy,
227 };
228
229 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
230 {
231         struct drm_i915_private *dev_priv = dev->dev_private;
232         struct drm_connector *connector;
233         struct intel_output *intel_output;
234         struct intel_hdmi_priv *hdmi_priv;
235
236         intel_output = kcalloc(sizeof(struct intel_output) +
237                                sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
238         if (!intel_output)
239                 return;
240         hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);
241
242         connector = &intel_output->base;
243         drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
244                            DRM_MODE_CONNECTOR_HDMIA);
245         drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
246
247         intel_output->type = INTEL_OUTPUT_HDMI;
248
249         connector->interlace_allowed = 0;
250         connector->doublescan_allowed = 0;
251         intel_output->crtc_mask = (1 << 0) | (1 << 1);
252
253         /* Set up the DDC bus. */
254         if (sdvox_reg == SDVOB) {
255                 intel_output->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
256                 intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
257                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
258         } else if (sdvox_reg == SDVOC) {
259                 intel_output->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
260                 intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
261                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
262         } else if (sdvox_reg == HDMIB) {
263                 intel_output->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
264                 intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
265                                                                 "HDMIB");
266                 dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
267         } else if (sdvox_reg == HDMIC) {
268                 intel_output->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
269                 intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
270                                                                 "HDMIC");
271                 dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
272         } else if (sdvox_reg == HDMID) {
273                 intel_output->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
274                 intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
275                                                                 "HDMID");
276                 dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
277         }
278         if (!intel_output->ddc_bus)
279                 goto err_connector;
280
281         hdmi_priv->sdvox_reg = sdvox_reg;
282         intel_output->dev_priv = hdmi_priv;
283
284         drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
285                          DRM_MODE_ENCODER_TMDS);
286         drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);
287
288         drm_mode_connector_attach_encoder(&intel_output->base,
289                                           &intel_output->enc);
290         drm_sysfs_connector_add(connector);
291
292         /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
293          * 0xd.  Failure to do so will result in spurious interrupts being
294          * generated on the port when a cable is not attached.
295          */
296         if (IS_G4X(dev) && !IS_GM45(dev)) {
297                 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
298                 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
299         }
300
301         return;
302
303 err_connector:
304         drm_connector_cleanup(connector);
305         kfree(intel_output);
306
307         return;
308 }