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79e53945 JB |
1 | /* |
2 | * Copyright © 2006-2007 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Eric Anholt <eric@anholt.net> | |
25 | */ | |
26 | ||
27 | #include <linux/i2c.h> | |
28 | #include "drmP.h" | |
29 | #include "drm.h" | |
30 | #include "drm_crtc.h" | |
31 | #include "drm_crtc_helper.h" | |
32 | #include "intel_drv.h" | |
33 | #include "i915_drm.h" | |
34 | #include "i915_drv.h" | |
35 | ||
36 | static void intel_crt_dpms(struct drm_encoder *encoder, int mode) | |
37 | { | |
38 | struct drm_device *dev = encoder->dev; | |
39 | struct drm_i915_private *dev_priv = dev->dev_private; | |
40 | u32 temp; | |
41 | ||
42 | temp = I915_READ(ADPA); | |
43 | temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE); | |
5ca58282 | 44 | temp |= ADPA_DAC_ENABLE; |
79e53945 JB |
45 | |
46 | switch(mode) { | |
47 | case DRM_MODE_DPMS_ON: | |
48 | temp |= ADPA_DAC_ENABLE; | |
49 | break; | |
50 | case DRM_MODE_DPMS_STANDBY: | |
51 | temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE; | |
52 | break; | |
53 | case DRM_MODE_DPMS_SUSPEND: | |
54 | temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE; | |
55 | break; | |
56 | case DRM_MODE_DPMS_OFF: | |
57 | temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE; | |
58 | break; | |
59 | } | |
60 | ||
61 | I915_WRITE(ADPA, temp); | |
62 | } | |
63 | ||
64 | static int intel_crt_mode_valid(struct drm_connector *connector, | |
65 | struct drm_display_mode *mode) | |
66 | { | |
6bcdcd9e ZY |
67 | struct drm_device *dev = connector->dev; |
68 | ||
69 | int max_clock = 0; | |
79e53945 JB |
70 | if (mode->flags & DRM_MODE_FLAG_DBLSCAN) |
71 | return MODE_NO_DBLESCAN; | |
72 | ||
6bcdcd9e ZY |
73 | if (mode->clock < 25000) |
74 | return MODE_CLOCK_LOW; | |
75 | ||
76 | if (!IS_I9XX(dev)) | |
77 | max_clock = 350000; | |
78 | else | |
79 | max_clock = 400000; | |
80 | if (mode->clock > max_clock) | |
81 | return MODE_CLOCK_HIGH; | |
79e53945 JB |
82 | |
83 | return MODE_OK; | |
84 | } | |
85 | ||
86 | static bool intel_crt_mode_fixup(struct drm_encoder *encoder, | |
87 | struct drm_display_mode *mode, | |
88 | struct drm_display_mode *adjusted_mode) | |
89 | { | |
90 | return true; | |
91 | } | |
92 | ||
93 | static void intel_crt_mode_set(struct drm_encoder *encoder, | |
94 | struct drm_display_mode *mode, | |
95 | struct drm_display_mode *adjusted_mode) | |
96 | { | |
97 | ||
98 | struct drm_device *dev = encoder->dev; | |
99 | struct drm_crtc *crtc = encoder->crtc; | |
100 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
101 | struct drm_i915_private *dev_priv = dev->dev_private; | |
102 | int dpll_md_reg; | |
103 | u32 adpa, dpll_md; | |
104 | ||
105 | if (intel_crtc->pipe == 0) | |
106 | dpll_md_reg = DPLL_A_MD; | |
107 | else | |
108 | dpll_md_reg = DPLL_B_MD; | |
109 | ||
110 | /* | |
111 | * Disable separate mode multiplier used when cloning SDVO to CRT | |
112 | * XXX this needs to be adjusted when we really are cloning | |
113 | */ | |
114 | if (IS_I965G(dev)) { | |
115 | dpll_md = I915_READ(dpll_md_reg); | |
116 | I915_WRITE(dpll_md_reg, | |
117 | dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK); | |
118 | } | |
119 | ||
120 | adpa = 0; | |
121 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
122 | adpa |= ADPA_HSYNC_ACTIVE_HIGH; | |
123 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
124 | adpa |= ADPA_VSYNC_ACTIVE_HIGH; | |
125 | ||
6bcdcd9e | 126 | if (intel_crtc->pipe == 0) { |
79e53945 | 127 | adpa |= ADPA_PIPE_A_SELECT; |
6bcdcd9e ZY |
128 | I915_WRITE(BCLRPAT_A, 0); |
129 | } else { | |
79e53945 | 130 | adpa |= ADPA_PIPE_B_SELECT; |
6bcdcd9e ZY |
131 | I915_WRITE(BCLRPAT_B, 0); |
132 | } | |
79e53945 JB |
133 | |
134 | I915_WRITE(ADPA, adpa); | |
135 | } | |
136 | ||
137 | /** | |
138 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence. | |
139 | * | |
140 | * Not for i915G/i915GM | |
141 | * | |
142 | * \return true if CRT is connected. | |
143 | * \return false if CRT is disconnected. | |
144 | */ | |
145 | static bool intel_crt_detect_hotplug(struct drm_connector *connector) | |
146 | { | |
147 | struct drm_device *dev = connector->dev; | |
148 | struct drm_i915_private *dev_priv = dev->dev_private; | |
771cb081 ZY |
149 | u32 hotplug_en; |
150 | int i, tries = 0; | |
151 | /* | |
152 | * On 4 series desktop, CRT detect sequence need to be done twice | |
153 | * to get a reliable result. | |
154 | */ | |
79e53945 | 155 | |
771cb081 ZY |
156 | if (IS_G4X(dev) && !IS_GM45(dev)) |
157 | tries = 2; | |
158 | else | |
159 | tries = 1; | |
160 | hotplug_en = I915_READ(PORT_HOTPLUG_EN); | |
5ca58282 | 161 | hotplug_en &= CRT_FORCE_HOTPLUG_MASK; |
771cb081 ZY |
162 | hotplug_en |= CRT_HOTPLUG_FORCE_DETECT; |
163 | ||
e92597cf | 164 | if (IS_G4X(dev)) |
771cb081 ZY |
165 | hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64; |
166 | ||
167 | hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50; | |
168 | ||
169 | for (i = 0; i < tries ; i++) { | |
170 | unsigned long timeout; | |
171 | /* turn on the FORCE_DETECT */ | |
172 | I915_WRITE(PORT_HOTPLUG_EN, hotplug_en); | |
173 | timeout = jiffies + msecs_to_jiffies(1000); | |
174 | /* wait for FORCE_DETECT to go off */ | |
175 | do { | |
176 | if (!(I915_READ(PORT_HOTPLUG_EN) & | |
177 | CRT_HOTPLUG_FORCE_DETECT)) | |
178 | break; | |
179 | msleep(1); | |
180 | } while (time_after(timeout, jiffies)); | |
181 | } | |
79e53945 JB |
182 | |
183 | if ((I915_READ(PORT_HOTPLUG_STAT) & CRT_HOTPLUG_MONITOR_MASK) == | |
184 | CRT_HOTPLUG_MONITOR_COLOR) | |
185 | return true; | |
186 | ||
187 | return false; | |
188 | } | |
189 | ||
190 | static bool intel_crt_detect_ddc(struct drm_connector *connector) | |
191 | { | |
192 | struct intel_output *intel_output = to_intel_output(connector); | |
193 | ||
194 | /* CRT should always be at 0, but check anyway */ | |
195 | if (intel_output->type != INTEL_OUTPUT_ANALOG) | |
196 | return false; | |
197 | ||
198 | return intel_ddc_probe(intel_output); | |
199 | } | |
200 | ||
201 | static enum drm_connector_status intel_crt_detect(struct drm_connector *connector) | |
202 | { | |
203 | struct drm_device *dev = connector->dev; | |
204 | ||
205 | if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) { | |
206 | if (intel_crt_detect_hotplug(connector)) | |
207 | return connector_status_connected; | |
208 | else | |
209 | return connector_status_disconnected; | |
210 | } | |
211 | ||
212 | if (intel_crt_detect_ddc(connector)) | |
213 | return connector_status_connected; | |
214 | ||
215 | /* TODO use load detect */ | |
216 | return connector_status_unknown; | |
217 | } | |
218 | ||
219 | static void intel_crt_destroy(struct drm_connector *connector) | |
220 | { | |
221 | struct intel_output *intel_output = to_intel_output(connector); | |
222 | ||
223 | intel_i2c_destroy(intel_output->ddc_bus); | |
224 | drm_sysfs_connector_remove(connector); | |
225 | drm_connector_cleanup(connector); | |
226 | kfree(connector); | |
227 | } | |
228 | ||
229 | static int intel_crt_get_modes(struct drm_connector *connector) | |
230 | { | |
231 | struct intel_output *intel_output = to_intel_output(connector); | |
232 | return intel_ddc_get_modes(intel_output); | |
233 | } | |
234 | ||
235 | static int intel_crt_set_property(struct drm_connector *connector, | |
236 | struct drm_property *property, | |
237 | uint64_t value) | |
238 | { | |
239 | struct drm_device *dev = connector->dev; | |
240 | ||
241 | if (property == dev->mode_config.dpms_property && connector->encoder) | |
242 | intel_crt_dpms(connector->encoder, (uint32_t)(value & 0xf)); | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | /* | |
248 | * Routines for controlling stuff on the analog port | |
249 | */ | |
250 | ||
251 | static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = { | |
252 | .dpms = intel_crt_dpms, | |
253 | .mode_fixup = intel_crt_mode_fixup, | |
254 | .prepare = intel_encoder_prepare, | |
255 | .commit = intel_encoder_commit, | |
256 | .mode_set = intel_crt_mode_set, | |
257 | }; | |
258 | ||
259 | static const struct drm_connector_funcs intel_crt_connector_funcs = { | |
260 | .detect = intel_crt_detect, | |
261 | .fill_modes = drm_helper_probe_single_connector_modes, | |
262 | .destroy = intel_crt_destroy, | |
263 | .set_property = intel_crt_set_property, | |
264 | }; | |
265 | ||
266 | static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = { | |
267 | .mode_valid = intel_crt_mode_valid, | |
268 | .get_modes = intel_crt_get_modes, | |
269 | .best_encoder = intel_best_encoder, | |
270 | }; | |
271 | ||
b358d0a6 | 272 | static void intel_crt_enc_destroy(struct drm_encoder *encoder) |
79e53945 JB |
273 | { |
274 | drm_encoder_cleanup(encoder); | |
275 | } | |
276 | ||
277 | static const struct drm_encoder_funcs intel_crt_enc_funcs = { | |
278 | .destroy = intel_crt_enc_destroy, | |
279 | }; | |
280 | ||
281 | void intel_crt_init(struct drm_device *dev) | |
282 | { | |
283 | struct drm_connector *connector; | |
284 | struct intel_output *intel_output; | |
285 | ||
286 | intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL); | |
287 | if (!intel_output) | |
288 | return; | |
289 | ||
290 | connector = &intel_output->base; | |
291 | drm_connector_init(dev, &intel_output->base, | |
292 | &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA); | |
293 | ||
294 | drm_encoder_init(dev, &intel_output->enc, &intel_crt_enc_funcs, | |
295 | DRM_MODE_ENCODER_DAC); | |
296 | ||
297 | drm_mode_connector_attach_encoder(&intel_output->base, | |
298 | &intel_output->enc); | |
299 | ||
300 | /* Set up the DDC bus. */ | |
301 | intel_output->ddc_bus = intel_i2c_create(dev, GPIOA, "CRTDDC_A"); | |
302 | if (!intel_output->ddc_bus) { | |
303 | dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration " | |
304 | "failed.\n"); | |
305 | return; | |
306 | } | |
307 | ||
308 | intel_output->type = INTEL_OUTPUT_ANALOG; | |
309 | connector->interlace_allowed = 0; | |
310 | connector->doublescan_allowed = 0; | |
311 | ||
312 | drm_encoder_helper_add(&intel_output->enc, &intel_crt_helper_funcs); | |
313 | drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs); | |
314 | ||
315 | drm_sysfs_connector_add(connector); | |
316 | } |