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path: root/drivers/gpu/drm/i915/intel_dvo.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_dvo.c')
-rw-r--r--drivers/gpu/drm/i915/intel_dvo.c495
1 files changed, 495 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c
new file mode 100644
index 000000000000..8b8d6e65cd3f
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_dvo.c
@@ -0,0 +1,495 @@
1/*
2 * Copyright 2006 Dave Airlie <airlied@linux.ie>
3 * Copyright © 2006-2007 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 */
27#include <linux/i2c.h>
28#include "drmP.h"
29#include "drm.h"
30#include "drm_crtc.h"
31#include "intel_drv.h"
32#include "i915_drm.h"
33#include "i915_drv.h"
34#include "dvo.h"
35
36#define SIL164_ADDR 0x38
37#define CH7xxx_ADDR 0x76
38#define TFP410_ADDR 0x38
39
40static struct intel_dvo_device intel_dvo_devices[] = {
41 {
42 .type = INTEL_DVO_CHIP_TMDS,
43 .name = "sil164",
44 .dvo_reg = DVOC,
45 .slave_addr = SIL164_ADDR,
46 .dev_ops = &sil164_ops,
47 },
48 {
49 .type = INTEL_DVO_CHIP_TMDS,
50 .name = "ch7xxx",
51 .dvo_reg = DVOC,
52 .slave_addr = CH7xxx_ADDR,
53 .dev_ops = &ch7xxx_ops,
54 },
55 {
56 .type = INTEL_DVO_CHIP_LVDS,
57 .name = "ivch",
58 .dvo_reg = DVOA,
59 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
60 .dev_ops = &ivch_ops,
61 },
62 {
63 .type = INTEL_DVO_CHIP_TMDS,
64 .name = "tfp410",
65 .dvo_reg = DVOC,
66 .slave_addr = TFP410_ADDR,
67 .dev_ops = &tfp410_ops,
68 },
69 {
70 .type = INTEL_DVO_CHIP_LVDS,
71 .name = "ch7017",
72 .dvo_reg = DVOC,
73 .slave_addr = 0x75,
74 .gpio = GPIOE,
75 .dev_ops = &ch7017_ops,
76 }
77};
78
79static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
80{
81 struct drm_i915_private *dev_priv = encoder->dev->dev_private;
82 struct intel_output *intel_output = enc_to_intel_output(encoder);
83 struct intel_dvo_device *dvo = intel_output->dev_priv;
84 u32 dvo_reg = dvo->dvo_reg;
85 u32 temp = I915_READ(dvo_reg);
86
87 if (mode == DRM_MODE_DPMS_ON) {
88 I915_WRITE(dvo_reg, temp | DVO_ENABLE);
89 I915_READ(dvo_reg);
90 dvo->dev_ops->dpms(dvo, mode);
91 } else {
92 dvo->dev_ops->dpms(dvo, mode);
93 I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
94 I915_READ(dvo_reg);
95 }
96}
97
98static void intel_dvo_save(struct drm_connector *connector)
99{
100 struct drm_i915_private *dev_priv = connector->dev->dev_private;
101 struct intel_output *intel_output = to_intel_output(connector);
102 struct intel_dvo_device *dvo = intel_output->dev_priv;
103
104 /* Each output should probably just save the registers it touches,
105 * but for now, use more overkill.
106 */
107 dev_priv->saveDVOA = I915_READ(DVOA);
108 dev_priv->saveDVOB = I915_READ(DVOB);
109 dev_priv->saveDVOC = I915_READ(DVOC);
110
111 dvo->dev_ops->save(dvo);
112}
113
114static void intel_dvo_restore(struct drm_connector *connector)
115{
116 struct drm_i915_private *dev_priv = connector->dev->dev_private;
117 struct intel_output *intel_output = to_intel_output(connector);
118 struct intel_dvo_device *dvo = intel_output->dev_priv;
119
120 dvo->dev_ops->restore(dvo);
121
122 I915_WRITE(DVOA, dev_priv->saveDVOA);
123 I915_WRITE(DVOB, dev_priv->saveDVOB);
124 I915_WRITE(DVOC, dev_priv->saveDVOC);
125}
126
127static int intel_dvo_mode_valid(struct drm_connector *connector,
128 struct drm_display_mode *mode)
129{
130 struct intel_output *intel_output = to_intel_output(connector);
131 struct intel_dvo_device *dvo = intel_output->dev_priv;
132
133 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
134 return MODE_NO_DBLESCAN;
135
136 /* XXX: Validate clock range */
137
138 if (dvo->panel_fixed_mode) {
139 if (mode->hdisplay > dvo->panel_fixed_mode->hdisplay)
140 return MODE_PANEL;
141 if (mode->vdisplay > dvo->panel_fixed_mode->vdisplay)
142 return MODE_PANEL;
143 }
144
145 return dvo->dev_ops->mode_valid(dvo, mode);
146}
147
148static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
149 struct drm_display_mode *mode,
150 struct drm_display_mode *adjusted_mode)
151{
152 struct intel_output *intel_output = enc_to_intel_output(encoder);
153 struct intel_dvo_device *dvo = intel_output->dev_priv;
154
155 /* If we have timings from the BIOS for the panel, put them in
156 * to the adjusted mode. The CRTC will be set up for this mode,
157 * with the panel scaling set up to source from the H/VDisplay
158 * of the original mode.
159 */
160 if (dvo->panel_fixed_mode != NULL) {
161#define C(x) adjusted_mode->x = dvo->panel_fixed_mode->x
162 C(hdisplay);
163 C(hsync_start);
164 C(hsync_end);
165 C(htotal);
166 C(vdisplay);
167 C(vsync_start);
168 C(vsync_end);
169 C(vtotal);
170 C(clock);
171 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
172#undef C
173 }
174
175 if (dvo->dev_ops->mode_fixup)
176 return dvo->dev_ops->mode_fixup(dvo, mode, adjusted_mode);
177
178 return true;
179}
180
181static void intel_dvo_mode_set(struct drm_encoder *encoder,
182 struct drm_display_mode *mode,
183 struct drm_display_mode *adjusted_mode)
184{
185 struct drm_device *dev = encoder->dev;
186 struct drm_i915_private *dev_priv = dev->dev_private;
187 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
188 struct intel_output *intel_output = enc_to_intel_output(encoder);
189 struct intel_dvo_device *dvo = intel_output->dev_priv;
190 int pipe = intel_crtc->pipe;
191 u32 dvo_val;
192 u32 dvo_reg = dvo->dvo_reg, dvo_srcdim_reg;
193 int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
194
195 switch (dvo_reg) {
196 case DVOA:
197 default:
198 dvo_srcdim_reg = DVOA_SRCDIM;
199 break;
200 case DVOB:
201 dvo_srcdim_reg = DVOB_SRCDIM;
202 break;
203 case DVOC:
204 dvo_srcdim_reg = DVOC_SRCDIM;
205 break;
206 }
207
208 dvo->dev_ops->mode_set(dvo, mode, adjusted_mode);
209
210 /* Save the data order, since I don't know what it should be set to. */
211 dvo_val = I915_READ(dvo_reg) &
212 (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
213 dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
214 DVO_BLANK_ACTIVE_HIGH;
215
216 if (pipe == 1)
217 dvo_val |= DVO_PIPE_B_SELECT;
218 dvo_val |= DVO_PIPE_STALL;
219 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
220 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
221 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
222 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
223
224 I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
225
226 /*I915_WRITE(DVOB_SRCDIM,
227 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
228 (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
229 I915_WRITE(dvo_srcdim_reg,
230 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
231 (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
232 /*I915_WRITE(DVOB, dvo_val);*/
233 I915_WRITE(dvo_reg, dvo_val);
234}
235
236/**
237 * Detect the output connection on our DVO device.
238 *
239 * Unimplemented.
240 */
241static enum drm_connector_status intel_dvo_detect(struct drm_connector *connector)
242{
243 struct intel_output *intel_output = to_intel_output(connector);
244 struct intel_dvo_device *dvo = intel_output->dev_priv;
245
246 return dvo->dev_ops->detect(dvo);
247}
248
249static int intel_dvo_get_modes(struct drm_connector *connector)
250{
251 struct intel_output *intel_output = to_intel_output(connector);
252 struct intel_dvo_device *dvo = intel_output->dev_priv;
253
254 /* We should probably have an i2c driver get_modes function for those
255 * devices which will have a fixed set of modes determined by the chip
256 * (TV-out, for example), but for now with just TMDS and LVDS,
257 * that's not the case.
258 */
259 intel_ddc_get_modes(intel_output);
260 if (!list_empty(&connector->probed_modes))
261 return 1;
262
263
264 if (dvo->panel_fixed_mode != NULL) {
265 struct drm_display_mode *mode;
266 mode = drm_mode_duplicate(connector->dev, dvo->panel_fixed_mode);
267 if (mode) {
268 drm_mode_probed_add(connector, mode);
269 return 1;
270 }
271 }
272 return 0;
273}
274
275static void intel_dvo_destroy (struct drm_connector *connector)
276{
277 struct intel_output *intel_output = to_intel_output(connector);
278 struct intel_dvo_device *dvo = intel_output->dev_priv;
279
280 if (dvo) {
281 if (dvo->dev_ops->destroy)
282 dvo->dev_ops->destroy(dvo);
283 if (dvo->panel_fixed_mode)
284 kfree(dvo->panel_fixed_mode);
285 /* no need, in i830_dvoices[] now */
286 //kfree(dvo);
287 }
288 if (intel_output->i2c_bus)
289 intel_i2c_destroy(intel_output->i2c_bus);
290 if (intel_output->ddc_bus)
291 intel_i2c_destroy(intel_output->ddc_bus);
292 drm_sysfs_connector_remove(connector);
293 drm_connector_cleanup(connector);
294 kfree(intel_output);
295}
296
297#ifdef RANDR_GET_CRTC_INTERFACE
298static struct drm_crtc *intel_dvo_get_crtc(struct drm_connector *connector)
299{
300 struct drm_device *dev = connector->dev;
301 struct drm_i915_private *dev_priv = dev->dev_private;
302 struct intel_output *intel_output = to_intel_output(connector);
303 struct intel_dvo_device *dvo = intel_output->dev_priv;
304 int pipe = !!(I915_READ(dvo->dvo_reg) & SDVO_PIPE_B_SELECT);
305
306 return intel_pipe_to_crtc(pScrn, pipe);
307}
308#endif
309
310static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
311 .dpms = intel_dvo_dpms,
312 .mode_fixup = intel_dvo_mode_fixup,
313 .prepare = intel_encoder_prepare,
314 .mode_set = intel_dvo_mode_set,
315 .commit = intel_encoder_commit,
316};
317
318static const struct drm_connector_funcs intel_dvo_connector_funcs = {
319 .save = intel_dvo_save,
320 .restore = intel_dvo_restore,
321 .detect = intel_dvo_detect,
322 .destroy = intel_dvo_destroy,
323 .fill_modes = drm_helper_probe_single_connector_modes,
324};
325
326static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
327 .mode_valid = intel_dvo_mode_valid,
328 .get_modes = intel_dvo_get_modes,
329 .best_encoder = intel_best_encoder,
330};
331
332static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
333{
334 drm_encoder_cleanup(encoder);
335}
336
337static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
338 .destroy = intel_dvo_enc_destroy,
339};
340
341
342/**
343 * Attempts to get a fixed panel timing for LVDS (currently only the i830).
344 *
345 * Other chips with DVO LVDS will need to extend this to deal with the LVDS
346 * chip being on DVOB/C and having multiple pipes.
347 */
348static struct drm_display_mode *
349intel_dvo_get_current_mode (struct drm_connector *connector)
350{
351 struct drm_device *dev = connector->dev;
352 struct drm_i915_private *dev_priv = dev->dev_private;
353 struct intel_output *intel_output = to_intel_output(connector);
354 struct intel_dvo_device *dvo = intel_output->dev_priv;
355 uint32_t dvo_reg = dvo->dvo_reg;
356 uint32_t dvo_val = I915_READ(dvo_reg);
357 struct drm_display_mode *mode = NULL;
358
359 /* If the DVO port is active, that'll be the LVDS, so we can pull out
360 * its timings to get how the BIOS set up the panel.
361 */
362 if (dvo_val & DVO_ENABLE) {
363 struct drm_crtc *crtc;
364 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
365
366 crtc = intel_get_crtc_from_pipe(dev, pipe);
367 if (crtc) {
368 mode = intel_crtc_mode_get(dev, crtc);
369
370 if (mode) {
371 mode->type |= DRM_MODE_TYPE_PREFERRED;
372 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
373 mode->flags |= DRM_MODE_FLAG_PHSYNC;
374 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
375 mode->flags |= DRM_MODE_FLAG_PVSYNC;
376 }
377 }
378 }
379 return mode;
380}
381
382void intel_dvo_init(struct drm_device *dev)
383{
384 struct intel_output *intel_output;
385 struct intel_dvo_device *dvo;
386 struct intel_i2c_chan *i2cbus = NULL;
387 int ret = 0;
388 int i;
389 int gpio_inited = 0;
390 int encoder_type = DRM_MODE_ENCODER_NONE;
391 intel_output = kzalloc (sizeof(struct intel_output), GFP_KERNEL);
392 if (!intel_output)
393 return;
394
395 /* Set up the DDC bus */
396 intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D");
397 if (!intel_output->ddc_bus)
398 goto free_intel;
399
400 /* Now, try to find a controller */
401 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
402 struct drm_connector *connector = &intel_output->base;
403 int gpio;
404
405 dvo = &intel_dvo_devices[i];
406
407 /* Allow the I2C driver info to specify the GPIO to be used in
408 * special cases, but otherwise default to what's defined
409 * in the spec.
410 */
411 if (dvo->gpio != 0)
412 gpio = dvo->gpio;
413 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
414 gpio = GPIOB;
415 else
416 gpio = GPIOE;
417
418 /* Set up the I2C bus necessary for the chip we're probing.
419 * It appears that everything is on GPIOE except for panels
420 * on i830 laptops, which are on GPIOB (DVOA).
421 */
422 if (gpio_inited != gpio) {
423 if (i2cbus != NULL)
424 intel_i2c_destroy(i2cbus);
425 if (!(i2cbus = intel_i2c_create(dev, gpio,
426 gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) {
427 continue;
428 }
429 gpio_inited = gpio;
430 }
431
432 if (dvo->dev_ops!= NULL)
433 ret = dvo->dev_ops->init(dvo, i2cbus);
434 else
435 ret = false;
436
437 if (!ret)
438 continue;
439
440 intel_output->type = INTEL_OUTPUT_DVO;
441 switch (dvo->type) {
442 case INTEL_DVO_CHIP_TMDS:
443 drm_connector_init(dev, connector,
444 &intel_dvo_connector_funcs,
445 DRM_MODE_CONNECTOR_DVII);
446 encoder_type = DRM_MODE_ENCODER_TMDS;
447 break;
448 case INTEL_DVO_CHIP_LVDS:
449 drm_connector_init(dev, connector,
450 &intel_dvo_connector_funcs,
451 DRM_MODE_CONNECTOR_LVDS);
452 encoder_type = DRM_MODE_ENCODER_LVDS;
453 break;
454 }
455
456 drm_connector_helper_add(connector,
457 &intel_dvo_connector_helper_funcs);
458 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
459 connector->interlace_allowed = false;
460 connector->doublescan_allowed = false;
461
462 intel_output->dev_priv = dvo;
463 intel_output->i2c_bus = i2cbus;
464
465 drm_encoder_init(dev, &intel_output->enc,
466 &intel_dvo_enc_funcs, encoder_type);
467 drm_encoder_helper_add(&intel_output->enc,
468 &intel_dvo_helper_funcs);
469
470 drm_mode_connector_attach_encoder(&intel_output->base,
471 &intel_output->enc);
472 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
473 /* For our LVDS chipsets, we should hopefully be able
474 * to dig the fixed panel mode out of the BIOS data.
475 * However, it's in a different format from the BIOS
476 * data on chipsets with integrated LVDS (stored in AIM
477 * headers, likely), so for now, just get the current
478 * mode being output through DVO.
479 */
480 dvo->panel_fixed_mode =
481 intel_dvo_get_current_mode(connector);
482 dvo->panel_wants_dither = true;
483 }
484
485 drm_sysfs_connector_add(connector);
486 return;
487 }
488
489 intel_i2c_destroy(intel_output->ddc_bus);
490 /* Didn't find a chip, so tear down. */
491 if (i2cbus != NULL)
492 intel_i2c_destroy(i2cbus);
493free_intel:
494 kfree(intel_output);
495}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 05:28:27 -0500