2 * Copyright 2006 Dave Airlie <airlied@linux.ie>
3 * Copyright © 2006-2007 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>
27 #include <linux/i2c.h>
28 #include <linux/slab.h>
32 #include "intel_drv.h"
37 #define SIL164_ADDR 0x38
38 #define CH7xxx_ADDR 0x76
39 #define TFP410_ADDR 0x38
41 static const struct intel_dvo_device intel_dvo_devices[] = {
43 .type = INTEL_DVO_CHIP_TMDS,
46 .slave_addr = SIL164_ADDR,
47 .dev_ops = &sil164_ops,
50 .type = INTEL_DVO_CHIP_TMDS,
53 .slave_addr = CH7xxx_ADDR,
54 .dev_ops = &ch7xxx_ops,
57 .type = INTEL_DVO_CHIP_LVDS,
60 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
64 .type = INTEL_DVO_CHIP_TMDS,
67 .slave_addr = TFP410_ADDR,
68 .dev_ops = &tfp410_ops,
71 .type = INTEL_DVO_CHIP_LVDS,
76 .dev_ops = &ch7017_ops,
81 struct intel_encoder base;
83 struct intel_dvo_device dev;
85 struct drm_display_mode *panel_fixed_mode;
86 bool panel_wants_dither;
89 static struct intel_dvo *enc_to_intel_dvo(struct drm_encoder *encoder)
91 return container_of(enc_to_intel_encoder(encoder), struct intel_dvo, base);
94 static void intel_dvo_dpms(struct drm_encoder *encoder, int mode)
96 struct drm_i915_private *dev_priv = encoder->dev->dev_private;
97 struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
98 u32 dvo_reg = intel_dvo->dev.dvo_reg;
99 u32 temp = I915_READ(dvo_reg);
101 if (mode == DRM_MODE_DPMS_ON) {
102 I915_WRITE(dvo_reg, temp | DVO_ENABLE);
104 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, mode);
106 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, mode);
107 I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
112 static int intel_dvo_mode_valid(struct drm_connector *connector,
113 struct drm_display_mode *mode)
115 struct drm_encoder *encoder = intel_attached_encoder(connector);
116 struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
118 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
119 return MODE_NO_DBLESCAN;
121 /* XXX: Validate clock range */
123 if (intel_dvo->panel_fixed_mode) {
124 if (mode->hdisplay > intel_dvo->panel_fixed_mode->hdisplay)
126 if (mode->vdisplay > intel_dvo->panel_fixed_mode->vdisplay)
130 return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
133 static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
134 struct drm_display_mode *mode,
135 struct drm_display_mode *adjusted_mode)
137 struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
139 /* If we have timings from the BIOS for the panel, put them in
140 * to the adjusted mode. The CRTC will be set up for this mode,
141 * with the panel scaling set up to source from the H/VDisplay
142 * of the original mode.
144 if (intel_dvo->panel_fixed_mode != NULL) {
145 #define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
155 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
159 if (intel_dvo->dev.dev_ops->mode_fixup)
160 return intel_dvo->dev.dev_ops->mode_fixup(&intel_dvo->dev, mode, adjusted_mode);
165 static void intel_dvo_mode_set(struct drm_encoder *encoder,
166 struct drm_display_mode *mode,
167 struct drm_display_mode *adjusted_mode)
169 struct drm_device *dev = encoder->dev;
170 struct drm_i915_private *dev_priv = dev->dev_private;
171 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
172 struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
173 int pipe = intel_crtc->pipe;
175 u32 dvo_reg = intel_dvo->dev.dvo_reg, dvo_srcdim_reg;
176 int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
181 dvo_srcdim_reg = DVOA_SRCDIM;
184 dvo_srcdim_reg = DVOB_SRCDIM;
187 dvo_srcdim_reg = DVOC_SRCDIM;
191 intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev, mode, adjusted_mode);
193 /* Save the data order, since I don't know what it should be set to. */
194 dvo_val = I915_READ(dvo_reg) &
195 (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
196 dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
197 DVO_BLANK_ACTIVE_HIGH;
200 dvo_val |= DVO_PIPE_B_SELECT;
201 dvo_val |= DVO_PIPE_STALL;
202 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
203 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
204 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
205 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
207 I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
209 /*I915_WRITE(DVOB_SRCDIM,
210 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
211 (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
212 I915_WRITE(dvo_srcdim_reg,
213 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
214 (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
215 /*I915_WRITE(DVOB, dvo_val);*/
216 I915_WRITE(dvo_reg, dvo_val);
220 * Detect the output connection on our DVO device.
224 static enum drm_connector_status
225 intel_dvo_detect(struct drm_connector *connector, bool force)
227 struct drm_encoder *encoder = intel_attached_encoder(connector);
228 struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
230 return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
233 static int intel_dvo_get_modes(struct drm_connector *connector)
235 struct drm_encoder *encoder = intel_attached_encoder(connector);
236 struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
238 /* We should probably have an i2c driver get_modes function for those
239 * devices which will have a fixed set of modes determined by the chip
240 * (TV-out, for example), but for now with just TMDS and LVDS,
241 * that's not the case.
243 intel_ddc_get_modes(connector, intel_dvo->base.ddc_bus);
244 if (!list_empty(&connector->probed_modes))
247 if (intel_dvo->panel_fixed_mode != NULL) {
248 struct drm_display_mode *mode;
249 mode = drm_mode_duplicate(connector->dev, intel_dvo->panel_fixed_mode);
251 drm_mode_probed_add(connector, mode);
259 static void intel_dvo_destroy(struct drm_connector *connector)
261 drm_sysfs_connector_remove(connector);
262 drm_connector_cleanup(connector);
266 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
267 .dpms = intel_dvo_dpms,
268 .mode_fixup = intel_dvo_mode_fixup,
269 .prepare = intel_encoder_prepare,
270 .mode_set = intel_dvo_mode_set,
271 .commit = intel_encoder_commit,
274 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
275 .dpms = drm_helper_connector_dpms,
276 .detect = intel_dvo_detect,
277 .destroy = intel_dvo_destroy,
278 .fill_modes = drm_helper_probe_single_connector_modes,
281 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
282 .mode_valid = intel_dvo_mode_valid,
283 .get_modes = intel_dvo_get_modes,
284 .best_encoder = intel_attached_encoder,
287 static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
289 struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
291 if (intel_dvo->dev.dev_ops->destroy)
292 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
294 kfree(intel_dvo->panel_fixed_mode);
296 intel_encoder_destroy(encoder);
299 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
300 .destroy = intel_dvo_enc_destroy,
304 * Attempts to get a fixed panel timing for LVDS (currently only the i830).
306 * Other chips with DVO LVDS will need to extend this to deal with the LVDS
307 * chip being on DVOB/C and having multiple pipes.
309 static struct drm_display_mode *
310 intel_dvo_get_current_mode(struct drm_connector *connector)
312 struct drm_device *dev = connector->dev;
313 struct drm_i915_private *dev_priv = dev->dev_private;
314 struct drm_encoder *encoder = intel_attached_encoder(connector);
315 struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
316 uint32_t dvo_val = I915_READ(intel_dvo->dev.dvo_reg);
317 struct drm_display_mode *mode = NULL;
319 /* If the DVO port is active, that'll be the LVDS, so we can pull out
320 * its timings to get how the BIOS set up the panel.
322 if (dvo_val & DVO_ENABLE) {
323 struct drm_crtc *crtc;
324 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
326 crtc = intel_get_crtc_from_pipe(dev, pipe);
328 mode = intel_crtc_mode_get(dev, crtc);
330 mode->type |= DRM_MODE_TYPE_PREFERRED;
331 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
332 mode->flags |= DRM_MODE_FLAG_PHSYNC;
333 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
334 mode->flags |= DRM_MODE_FLAG_PVSYNC;
342 void intel_dvo_init(struct drm_device *dev)
344 struct intel_encoder *intel_encoder;
345 struct intel_dvo *intel_dvo;
346 struct intel_connector *intel_connector;
347 struct i2c_adapter *i2cbus = NULL;
350 int encoder_type = DRM_MODE_ENCODER_NONE;
352 intel_dvo = kzalloc(sizeof(struct intel_dvo), GFP_KERNEL);
356 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
357 if (!intel_connector) {
362 intel_encoder = &intel_dvo->base;
364 /* Set up the DDC bus */
365 intel_encoder->ddc_bus = intel_i2c_create(dev, GPIOD, "DVODDC_D");
366 if (!intel_encoder->ddc_bus)
369 /* Now, try to find a controller */
370 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
371 struct drm_connector *connector = &intel_connector->base;
372 const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
375 /* Allow the I2C driver info to specify the GPIO to be used in
376 * special cases, but otherwise default to what's defined
381 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
386 /* Set up the I2C bus necessary for the chip we're probing.
387 * It appears that everything is on GPIOE except for panels
388 * on i830 laptops, which are on GPIOB (DVOA).
391 intel_i2c_destroy(i2cbus);
392 if (!(i2cbus = intel_i2c_create(dev, gpio,
393 gpio == GPIOB ? "DVOI2C_B" : "DVOI2C_E"))) {
397 intel_dvo->dev = *dvo;
398 ret = dvo->dev_ops->init(&intel_dvo->dev, i2cbus);
402 intel_encoder->type = INTEL_OUTPUT_DVO;
403 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
405 case INTEL_DVO_CHIP_TMDS:
406 intel_encoder->clone_mask =
407 (1 << INTEL_DVO_TMDS_CLONE_BIT) |
408 (1 << INTEL_ANALOG_CLONE_BIT);
409 drm_connector_init(dev, connector,
410 &intel_dvo_connector_funcs,
411 DRM_MODE_CONNECTOR_DVII);
412 encoder_type = DRM_MODE_ENCODER_TMDS;
414 case INTEL_DVO_CHIP_LVDS:
415 intel_encoder->clone_mask =
416 (1 << INTEL_DVO_LVDS_CLONE_BIT);
417 drm_connector_init(dev, connector,
418 &intel_dvo_connector_funcs,
419 DRM_MODE_CONNECTOR_LVDS);
420 encoder_type = DRM_MODE_ENCODER_LVDS;
424 drm_connector_helper_add(connector,
425 &intel_dvo_connector_helper_funcs);
426 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
427 connector->interlace_allowed = false;
428 connector->doublescan_allowed = false;
430 drm_encoder_init(dev, &intel_encoder->enc,
431 &intel_dvo_enc_funcs, encoder_type);
432 drm_encoder_helper_add(&intel_encoder->enc,
433 &intel_dvo_helper_funcs);
435 drm_mode_connector_attach_encoder(&intel_connector->base,
436 &intel_encoder->enc);
437 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
438 /* For our LVDS chipsets, we should hopefully be able
439 * to dig the fixed panel mode out of the BIOS data.
440 * However, it's in a different format from the BIOS
441 * data on chipsets with integrated LVDS (stored in AIM
442 * headers, likely), so for now, just get the current
443 * mode being output through DVO.
445 intel_dvo->panel_fixed_mode =
446 intel_dvo_get_current_mode(connector);
447 intel_dvo->panel_wants_dither = true;
450 drm_sysfs_connector_add(connector);
454 intel_i2c_destroy(intel_encoder->ddc_bus);
455 /* Didn't find a chip, so tear down. */
457 intel_i2c_destroy(i2cbus);
460 kfree(intel_connector);