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7d57382e EA |
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/delay.h> | |
31 | #include "drmP.h" | |
32 | #include "drm.h" | |
33 | #include "drm_crtc.h" | |
34 | #include "intel_drv.h" | |
35 | #include "i915_drm.h" | |
36 | #include "i915_drv.h" | |
37 | ||
38 | struct intel_hdmi_priv { | |
39 | u32 sdvox_reg; | |
40 | u32 save_SDVOX; | |
9dff6af8 | 41 | bool has_hdmi_sink; |
7d57382e EA |
42 | }; |
43 | ||
44 | static void intel_hdmi_mode_set(struct drm_encoder *encoder, | |
45 | struct drm_display_mode *mode, | |
46 | struct drm_display_mode *adjusted_mode) | |
47 | { | |
48 | struct drm_device *dev = encoder->dev; | |
49 | struct drm_i915_private *dev_priv = dev->dev_private; | |
50 | struct drm_crtc *crtc = encoder->crtc; | |
51 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
52 | struct intel_output *intel_output = enc_to_intel_output(encoder); | |
53 | struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv; | |
54 | u32 sdvox; | |
55 | ||
56 | sdvox = SDVO_ENCODING_HDMI | | |
57 | SDVO_BORDER_ENABLE | | |
58 | SDVO_VSYNC_ACTIVE_HIGH | | |
59 | SDVO_HSYNC_ACTIVE_HIGH; | |
60 | ||
61 | if (hdmi_priv->has_hdmi_sink) | |
62 | sdvox |= SDVO_AUDIO_ENABLE; | |
63 | ||
64 | if (intel_crtc->pipe == 1) | |
65 | sdvox |= SDVO_PIPE_B_SELECT; | |
66 | ||
67 | I915_WRITE(hdmi_priv->sdvox_reg, sdvox); | |
68 | POSTING_READ(hdmi_priv->sdvox_reg); | |
69 | } | |
70 | ||
71 | static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode) | |
72 | { | |
73 | struct drm_device *dev = encoder->dev; | |
74 | struct drm_i915_private *dev_priv = dev->dev_private; | |
75 | struct intel_output *intel_output = enc_to_intel_output(encoder); | |
76 | struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv; | |
77 | u32 temp; | |
78 | ||
79 | if (mode != DRM_MODE_DPMS_ON) { | |
80 | temp = I915_READ(hdmi_priv->sdvox_reg); | |
81 | I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE); | |
82 | } else { | |
83 | temp = I915_READ(hdmi_priv->sdvox_reg); | |
84 | I915_WRITE(hdmi_priv->sdvox_reg, temp | SDVO_ENABLE); | |
85 | } | |
86 | POSTING_READ(hdmi_priv->sdvox_reg); | |
87 | } | |
88 | ||
89 | static void intel_hdmi_save(struct drm_connector *connector) | |
90 | { | |
91 | struct drm_device *dev = connector->dev; | |
92 | struct drm_i915_private *dev_priv = dev->dev_private; | |
93 | struct intel_output *intel_output = to_intel_output(connector); | |
94 | struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv; | |
95 | ||
96 | hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg); | |
97 | } | |
98 | ||
99 | static void intel_hdmi_restore(struct drm_connector *connector) | |
100 | { | |
101 | struct drm_device *dev = connector->dev; | |
102 | struct drm_i915_private *dev_priv = dev->dev_private; | |
103 | struct intel_output *intel_output = to_intel_output(connector); | |
104 | struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv; | |
105 | ||
106 | I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX); | |
107 | POSTING_READ(hdmi_priv->sdvox_reg); | |
108 | } | |
109 | ||
110 | static int intel_hdmi_mode_valid(struct drm_connector *connector, | |
111 | struct drm_display_mode *mode) | |
112 | { | |
113 | if (mode->clock > 165000) | |
114 | return MODE_CLOCK_HIGH; | |
115 | if (mode->clock < 20000) | |
116 | return MODE_CLOCK_HIGH; | |
117 | ||
118 | if (mode->flags & DRM_MODE_FLAG_DBLSCAN) | |
119 | return MODE_NO_DBLESCAN; | |
120 | ||
121 | return MODE_OK; | |
122 | } | |
123 | ||
124 | static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder, | |
125 | struct drm_display_mode *mode, | |
126 | struct drm_display_mode *adjusted_mode) | |
127 | { | |
128 | return true; | |
129 | } | |
130 | ||
9dff6af8 ML |
131 | static void |
132 | intel_hdmi_sink_detect(struct drm_connector *connector) | |
133 | { | |
134 | struct intel_output *intel_output = to_intel_output(connector); | |
135 | struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv; | |
136 | struct edid *edid = NULL; | |
137 | ||
138 | edid = drm_get_edid(&intel_output->base, | |
139 | &intel_output->ddc_bus->adapter); | |
140 | if (edid != NULL) { | |
141 | hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid); | |
142 | kfree(edid); | |
143 | intel_output->base.display_info.raw_edid = NULL; | |
144 | } | |
145 | } | |
146 | ||
7d57382e EA |
147 | static enum drm_connector_status |
148 | intel_hdmi_detect(struct drm_connector *connector) | |
149 | { | |
150 | struct drm_device *dev = connector->dev; | |
151 | struct drm_i915_private *dev_priv = dev->dev_private; | |
152 | struct intel_output *intel_output = to_intel_output(connector); | |
153 | struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv; | |
154 | u32 temp, bit; | |
155 | ||
156 | temp = I915_READ(PORT_HOTPLUG_EN); | |
157 | ||
9d2949a4 ML |
158 | switch (hdmi_priv->sdvox_reg) { |
159 | case SDVOB: | |
160 | temp |= HDMIB_HOTPLUG_INT_EN; | |
161 | break; | |
162 | case SDVOC: | |
163 | temp |= HDMIC_HOTPLUG_INT_EN; | |
164 | break; | |
165 | default: | |
166 | return connector_status_unknown; | |
167 | } | |
168 | ||
169 | I915_WRITE(PORT_HOTPLUG_EN, temp); | |
7d57382e EA |
170 | |
171 | POSTING_READ(PORT_HOTPLUG_EN); | |
172 | ||
173 | switch (hdmi_priv->sdvox_reg) { | |
174 | case SDVOB: | |
175 | bit = HDMIB_HOTPLUG_INT_STATUS; | |
176 | break; | |
177 | case SDVOC: | |
178 | bit = HDMIC_HOTPLUG_INT_STATUS; | |
179 | break; | |
180 | default: | |
181 | return connector_status_unknown; | |
182 | } | |
183 | ||
9dff6af8 ML |
184 | if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0) { |
185 | intel_hdmi_sink_detect(connector); | |
7d57382e | 186 | return connector_status_connected; |
9dff6af8 | 187 | } else |
7d57382e EA |
188 | return connector_status_disconnected; |
189 | } | |
190 | ||
191 | static int intel_hdmi_get_modes(struct drm_connector *connector) | |
192 | { | |
193 | struct intel_output *intel_output = to_intel_output(connector); | |
194 | ||
195 | /* We should parse the EDID data and find out if it's an HDMI sink so | |
196 | * we can send audio to it. | |
197 | */ | |
198 | ||
199 | return intel_ddc_get_modes(intel_output); | |
200 | } | |
201 | ||
202 | static void intel_hdmi_destroy(struct drm_connector *connector) | |
203 | { | |
204 | struct intel_output *intel_output = to_intel_output(connector); | |
205 | ||
206 | if (intel_output->i2c_bus) | |
207 | intel_i2c_destroy(intel_output->i2c_bus); | |
208 | drm_sysfs_connector_remove(connector); | |
209 | drm_connector_cleanup(connector); | |
210 | kfree(intel_output); | |
211 | } | |
212 | ||
213 | static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = { | |
214 | .dpms = intel_hdmi_dpms, | |
215 | .mode_fixup = intel_hdmi_mode_fixup, | |
216 | .prepare = intel_encoder_prepare, | |
217 | .mode_set = intel_hdmi_mode_set, | |
218 | .commit = intel_encoder_commit, | |
219 | }; | |
220 | ||
221 | static const struct drm_connector_funcs intel_hdmi_connector_funcs = { | |
c9fb15f6 | 222 | .dpms = drm_helper_connector_dpms, |
7d57382e EA |
223 | .save = intel_hdmi_save, |
224 | .restore = intel_hdmi_restore, | |
225 | .detect = intel_hdmi_detect, | |
226 | .fill_modes = drm_helper_probe_single_connector_modes, | |
227 | .destroy = intel_hdmi_destroy, | |
228 | }; | |
229 | ||
230 | static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = { | |
231 | .get_modes = intel_hdmi_get_modes, | |
232 | .mode_valid = intel_hdmi_mode_valid, | |
233 | .best_encoder = intel_best_encoder, | |
234 | }; | |
235 | ||
236 | static void intel_hdmi_enc_destroy(struct drm_encoder *encoder) | |
237 | { | |
238 | drm_encoder_cleanup(encoder); | |
239 | } | |
240 | ||
241 | static const struct drm_encoder_funcs intel_hdmi_enc_funcs = { | |
242 | .destroy = intel_hdmi_enc_destroy, | |
243 | }; | |
244 | ||
245 | ||
246 | void intel_hdmi_init(struct drm_device *dev, int sdvox_reg) | |
247 | { | |
248 | struct drm_i915_private *dev_priv = dev->dev_private; | |
249 | struct drm_connector *connector; | |
250 | struct intel_output *intel_output; | |
251 | struct intel_hdmi_priv *hdmi_priv; | |
252 | ||
253 | intel_output = kcalloc(sizeof(struct intel_output) + | |
254 | sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL); | |
255 | if (!intel_output) | |
256 | return; | |
257 | hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1); | |
258 | ||
259 | connector = &intel_output->base; | |
260 | drm_connector_init(dev, connector, &intel_hdmi_connector_funcs, | |
261 | DRM_MODE_CONNECTOR_DVID); | |
262 | drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs); | |
263 | ||
264 | intel_output->type = INTEL_OUTPUT_HDMI; | |
265 | ||
266 | connector->interlace_allowed = 0; | |
267 | connector->doublescan_allowed = 0; | |
268 | ||
269 | /* Set up the DDC bus. */ | |
270 | if (sdvox_reg == SDVOB) | |
271 | intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB"); | |
272 | else | |
273 | intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC"); | |
274 | ||
275 | if (!intel_output->ddc_bus) | |
276 | goto err_connector; | |
277 | ||
278 | hdmi_priv->sdvox_reg = sdvox_reg; | |
279 | intel_output->dev_priv = hdmi_priv; | |
280 | ||
281 | drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs, | |
282 | DRM_MODE_ENCODER_TMDS); | |
283 | drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs); | |
284 | ||
285 | drm_mode_connector_attach_encoder(&intel_output->base, | |
286 | &intel_output->enc); | |
287 | drm_sysfs_connector_add(connector); | |
288 | ||
289 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written | |
290 | * 0xd. Failure to do so will result in spurious interrupts being | |
291 | * generated on the port when a cable is not attached. | |
292 | */ | |
293 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
294 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
295 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
296 | } | |
297 | ||
298 | return; | |
299 | ||
300 | err_connector: | |
301 | drm_connector_cleanup(connector); | |
302 | kfree(intel_output); | |
303 | ||
304 | return; | |
305 | } |