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>
30 #include <drm/drm_crtc.h>
31 #include "intel_drv.h"
32 #include <drm/i915_drm.h>
36 #define SIL164_ADDR 0x38
37 #define CH7xxx_ADDR 0x76
38 #define TFP410_ADDR 0x38
39 #define NS2501_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_TMDS,
60 .slave_addr = 0x75, /* For some ch7010 */
61 .dev_ops = &ch7xxx_ops,
64 .type = INTEL_DVO_CHIP_LVDS,
67 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
71 .type = INTEL_DVO_CHIP_TMDS,
74 .slave_addr = TFP410_ADDR,
75 .dev_ops = &tfp410_ops,
78 .type = INTEL_DVO_CHIP_LVDS,
82 .gpio = GMBUS_PORT_DPB,
83 .dev_ops = &ch7017_ops,
86 .type = INTEL_DVO_CHIP_TMDS,
89 .slave_addr = NS2501_ADDR,
90 .dev_ops = &ns2501_ops,
95 struct intel_encoder base;
97 struct intel_dvo_device dev;
99 struct drm_display_mode *panel_fixed_mode;
100 bool panel_wants_dither;
103 static struct intel_dvo *enc_to_dvo(struct intel_encoder *encoder)
105 return container_of(encoder, struct intel_dvo, base);
108 static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
110 return enc_to_dvo(intel_attached_encoder(connector));
113 static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
115 struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base);
117 return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
120 static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
123 struct drm_device *dev = encoder->base.dev;
124 struct drm_i915_private *dev_priv = dev->dev_private;
125 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
128 tmp = I915_READ(intel_dvo->dev.dvo_reg);
130 if (!(tmp & DVO_ENABLE))
133 *pipe = PORT_TO_PIPE(tmp);
138 static void intel_dvo_get_config(struct intel_encoder *encoder,
139 struct intel_crtc_config *pipe_config)
141 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
142 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
145 tmp = I915_READ(intel_dvo->dev.dvo_reg);
146 if (tmp & DVO_HSYNC_ACTIVE_HIGH)
147 flags |= DRM_MODE_FLAG_PHSYNC;
149 flags |= DRM_MODE_FLAG_NHSYNC;
150 if (tmp & DVO_VSYNC_ACTIVE_HIGH)
151 flags |= DRM_MODE_FLAG_PVSYNC;
153 flags |= DRM_MODE_FLAG_NVSYNC;
155 pipe_config->adjusted_mode.flags |= flags;
158 static void intel_disable_dvo(struct intel_encoder *encoder)
160 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
161 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
162 u32 dvo_reg = intel_dvo->dev.dvo_reg;
163 u32 temp = I915_READ(dvo_reg);
165 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
166 I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
170 static void intel_enable_dvo(struct intel_encoder *encoder)
172 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
173 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
174 u32 dvo_reg = intel_dvo->dev.dvo_reg;
175 u32 temp = I915_READ(dvo_reg);
177 I915_WRITE(dvo_reg, temp | DVO_ENABLE);
179 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
182 /* Special dpms function to support cloning between dvo/sdvo/crt. */
183 static void intel_dvo_dpms(struct drm_connector *connector, int mode)
185 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
186 struct drm_crtc *crtc;
188 /* dvo supports only 2 dpms states. */
189 if (mode != DRM_MODE_DPMS_ON)
190 mode = DRM_MODE_DPMS_OFF;
192 if (mode == connector->dpms)
195 connector->dpms = mode;
197 /* Only need to change hw state when actually enabled */
198 crtc = intel_dvo->base.base.crtc;
200 intel_dvo->base.connectors_active = false;
204 /* We call connector dpms manually below in case pipe dpms doesn't
205 * change due to cloning. */
206 if (mode == DRM_MODE_DPMS_ON) {
207 intel_dvo->base.connectors_active = true;
209 intel_crtc_update_dpms(crtc);
211 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
213 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
215 intel_dvo->base.connectors_active = false;
217 intel_crtc_update_dpms(crtc);
220 intel_modeset_check_state(connector->dev);
223 static int intel_dvo_mode_valid(struct drm_connector *connector,
224 struct drm_display_mode *mode)
226 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
228 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
229 return MODE_NO_DBLESCAN;
231 /* XXX: Validate clock range */
233 if (intel_dvo->panel_fixed_mode) {
234 if (mode->hdisplay > intel_dvo->panel_fixed_mode->hdisplay)
236 if (mode->vdisplay > intel_dvo->panel_fixed_mode->vdisplay)
240 return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
243 static bool intel_dvo_compute_config(struct intel_encoder *encoder,
244 struct intel_crtc_config *pipe_config)
246 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
247 struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
249 /* If we have timings from the BIOS for the panel, put them in
250 * to the adjusted mode. The CRTC will be set up for this mode,
251 * with the panel scaling set up to source from the H/VDisplay
252 * of the original mode.
254 if (intel_dvo->panel_fixed_mode != NULL) {
255 #define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
267 drm_mode_set_crtcinfo(adjusted_mode, 0);
270 if (intel_dvo->dev.dev_ops->mode_fixup)
271 return intel_dvo->dev.dev_ops->mode_fixup(&intel_dvo->dev,
272 &pipe_config->requested_mode,
278 static void intel_dvo_mode_set(struct intel_encoder *encoder)
280 struct drm_device *dev = encoder->base.dev;
281 struct drm_i915_private *dev_priv = dev->dev_private;
282 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
283 struct drm_display_mode *adjusted_mode = &crtc->config.adjusted_mode;
284 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
285 int pipe = crtc->pipe;
287 u32 dvo_reg = intel_dvo->dev.dvo_reg, dvo_srcdim_reg;
292 dvo_srcdim_reg = DVOA_SRCDIM;
295 dvo_srcdim_reg = DVOB_SRCDIM;
298 dvo_srcdim_reg = DVOC_SRCDIM;
302 intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev,
303 &crtc->config.requested_mode,
306 /* Save the data order, since I don't know what it should be set to. */
307 dvo_val = I915_READ(dvo_reg) &
308 (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
309 dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
310 DVO_BLANK_ACTIVE_HIGH;
313 dvo_val |= DVO_PIPE_B_SELECT;
314 dvo_val |= DVO_PIPE_STALL;
315 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
316 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
317 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
318 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
320 /*I915_WRITE(DVOB_SRCDIM,
321 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
322 (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
323 I915_WRITE(dvo_srcdim_reg,
324 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
325 (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
326 /*I915_WRITE(DVOB, dvo_val);*/
327 I915_WRITE(dvo_reg, dvo_val);
331 * Detect the output connection on our DVO device.
335 static enum drm_connector_status
336 intel_dvo_detect(struct drm_connector *connector, bool force)
338 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
339 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
340 connector->base.id, drm_get_connector_name(connector));
341 return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
344 static int intel_dvo_get_modes(struct drm_connector *connector)
346 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
347 struct drm_i915_private *dev_priv = connector->dev->dev_private;
349 /* We should probably have an i2c driver get_modes function for those
350 * devices which will have a fixed set of modes determined by the chip
351 * (TV-out, for example), but for now with just TMDS and LVDS,
352 * that's not the case.
354 intel_ddc_get_modes(connector,
355 intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPC));
356 if (!list_empty(&connector->probed_modes))
359 if (intel_dvo->panel_fixed_mode != NULL) {
360 struct drm_display_mode *mode;
361 mode = drm_mode_duplicate(connector->dev, intel_dvo->panel_fixed_mode);
363 drm_mode_probed_add(connector, mode);
371 static void intel_dvo_destroy(struct drm_connector *connector)
373 drm_sysfs_connector_remove(connector);
374 drm_connector_cleanup(connector);
378 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
379 .dpms = intel_dvo_dpms,
380 .detect = intel_dvo_detect,
381 .destroy = intel_dvo_destroy,
382 .fill_modes = drm_helper_probe_single_connector_modes,
385 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
386 .mode_valid = intel_dvo_mode_valid,
387 .get_modes = intel_dvo_get_modes,
388 .best_encoder = intel_best_encoder,
391 static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
393 struct intel_dvo *intel_dvo = enc_to_dvo(to_intel_encoder(encoder));
395 if (intel_dvo->dev.dev_ops->destroy)
396 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
398 kfree(intel_dvo->panel_fixed_mode);
400 intel_encoder_destroy(encoder);
403 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
404 .destroy = intel_dvo_enc_destroy,
408 * Attempts to get a fixed panel timing for LVDS (currently only the i830).
410 * Other chips with DVO LVDS will need to extend this to deal with the LVDS
411 * chip being on DVOB/C and having multiple pipes.
413 static struct drm_display_mode *
414 intel_dvo_get_current_mode(struct drm_connector *connector)
416 struct drm_device *dev = connector->dev;
417 struct drm_i915_private *dev_priv = dev->dev_private;
418 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
419 uint32_t dvo_val = I915_READ(intel_dvo->dev.dvo_reg);
420 struct drm_display_mode *mode = NULL;
422 /* If the DVO port is active, that'll be the LVDS, so we can pull out
423 * its timings to get how the BIOS set up the panel.
425 if (dvo_val & DVO_ENABLE) {
426 struct drm_crtc *crtc;
427 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
429 crtc = intel_get_crtc_for_pipe(dev, pipe);
431 mode = intel_crtc_mode_get(dev, crtc);
433 mode->type |= DRM_MODE_TYPE_PREFERRED;
434 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
435 mode->flags |= DRM_MODE_FLAG_PHSYNC;
436 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
437 mode->flags |= DRM_MODE_FLAG_PVSYNC;
445 void intel_dvo_init(struct drm_device *dev)
447 struct drm_i915_private *dev_priv = dev->dev_private;
448 struct intel_encoder *intel_encoder;
449 struct intel_dvo *intel_dvo;
450 struct intel_connector *intel_connector;
452 int encoder_type = DRM_MODE_ENCODER_NONE;
454 intel_dvo = kzalloc(sizeof(struct intel_dvo), GFP_KERNEL);
458 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
459 if (!intel_connector) {
464 intel_encoder = &intel_dvo->base;
465 drm_encoder_init(dev, &intel_encoder->base,
466 &intel_dvo_enc_funcs, encoder_type);
468 intel_encoder->disable = intel_disable_dvo;
469 intel_encoder->enable = intel_enable_dvo;
470 intel_encoder->get_hw_state = intel_dvo_get_hw_state;
471 intel_encoder->get_config = intel_dvo_get_config;
472 intel_encoder->compute_config = intel_dvo_compute_config;
473 intel_encoder->mode_set = intel_dvo_mode_set;
474 intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
476 /* Now, try to find a controller */
477 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
478 struct drm_connector *connector = &intel_connector->base;
479 const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
480 struct i2c_adapter *i2c;
484 /* Allow the I2C driver info to specify the GPIO to be used in
485 * special cases, but otherwise default to what's defined
488 if (intel_gmbus_is_port_valid(dvo->gpio))
490 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
491 gpio = GMBUS_PORT_SSC;
493 gpio = GMBUS_PORT_DPB;
495 /* Set up the I2C bus necessary for the chip we're probing.
496 * It appears that everything is on GPIOE except for panels
497 * on i830 laptops, which are on GPIOB (DVOA).
499 i2c = intel_gmbus_get_adapter(dev_priv, gpio);
501 intel_dvo->dev = *dvo;
503 /* GMBUS NAK handling seems to be unstable, hence let the
504 * transmitter detection run in bit banging mode for now.
506 intel_gmbus_force_bit(i2c, true);
508 dvoinit = dvo->dev_ops->init(&intel_dvo->dev, i2c);
510 intel_gmbus_force_bit(i2c, false);
515 intel_encoder->type = INTEL_OUTPUT_DVO;
516 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
518 case INTEL_DVO_CHIP_TMDS:
519 intel_encoder->cloneable = true;
520 drm_connector_init(dev, connector,
521 &intel_dvo_connector_funcs,
522 DRM_MODE_CONNECTOR_DVII);
523 encoder_type = DRM_MODE_ENCODER_TMDS;
525 case INTEL_DVO_CHIP_LVDS:
526 intel_encoder->cloneable = false;
527 drm_connector_init(dev, connector,
528 &intel_dvo_connector_funcs,
529 DRM_MODE_CONNECTOR_LVDS);
530 encoder_type = DRM_MODE_ENCODER_LVDS;
534 drm_connector_helper_add(connector,
535 &intel_dvo_connector_helper_funcs);
536 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
537 connector->interlace_allowed = false;
538 connector->doublescan_allowed = false;
540 intel_connector_attach_encoder(intel_connector, intel_encoder);
541 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
542 /* For our LVDS chipsets, we should hopefully be able
543 * to dig the fixed panel mode out of the BIOS data.
544 * However, it's in a different format from the BIOS
545 * data on chipsets with integrated LVDS (stored in AIM
546 * headers, likely), so for now, just get the current
547 * mode being output through DVO.
549 intel_dvo->panel_fixed_mode =
550 intel_dvo_get_current_mode(connector);
551 intel_dvo->panel_wants_dither = true;
554 drm_sysfs_connector_add(connector);
558 drm_encoder_cleanup(&intel_encoder->base);
560 kfree(intel_connector);