2 * Copyright © 2006-2007 Intel Corporation
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:
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
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.
24 * Eric Anholt <eric@anholt.net>
27 #include <linux/i2c.h>
28 #include <linux/slab.h>
32 #include "drm_crtc_helper.h"
33 #include "intel_drv.h"
37 /* Here's the desired hotplug mode */
38 #define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 | \
39 ADPA_CRT_HOTPLUG_WARMUP_10MS | \
40 ADPA_CRT_HOTPLUG_SAMPLE_4S | \
41 ADPA_CRT_HOTPLUG_VOLTAGE_50 | \
42 ADPA_CRT_HOTPLUG_VOLREF_325MV | \
43 ADPA_CRT_HOTPLUG_ENABLE)
46 struct intel_encoder base;
47 bool force_hotplug_required;
50 static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
52 return container_of(intel_attached_encoder(connector),
53 struct intel_crt, base);
56 static void intel_crt_dpms(struct drm_encoder *encoder, int mode)
58 struct drm_device *dev = encoder->dev;
59 struct drm_i915_private *dev_priv = dev->dev_private;
62 if (HAS_PCH_SPLIT(dev))
67 temp = I915_READ(reg);
68 temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
69 temp &= ~ADPA_DAC_ENABLE;
72 case DRM_MODE_DPMS_ON:
73 temp |= ADPA_DAC_ENABLE;
75 case DRM_MODE_DPMS_STANDBY:
76 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
78 case DRM_MODE_DPMS_SUSPEND:
79 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
81 case DRM_MODE_DPMS_OFF:
82 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
86 I915_WRITE(reg, temp);
89 static int intel_crt_mode_valid(struct drm_connector *connector,
90 struct drm_display_mode *mode)
92 struct drm_device *dev = connector->dev;
95 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
96 return MODE_NO_DBLESCAN;
98 if (mode->clock < 25000)
99 return MODE_CLOCK_LOW;
105 if (mode->clock > max_clock)
106 return MODE_CLOCK_HIGH;
111 static bool intel_crt_mode_fixup(struct drm_encoder *encoder,
112 struct drm_display_mode *mode,
113 struct drm_display_mode *adjusted_mode)
118 static void intel_crt_mode_set(struct drm_encoder *encoder,
119 struct drm_display_mode *mode,
120 struct drm_display_mode *adjusted_mode)
123 struct drm_device *dev = encoder->dev;
124 struct drm_crtc *crtc = encoder->crtc;
125 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
126 struct drm_i915_private *dev_priv = dev->dev_private;
131 if (intel_crtc->pipe == 0)
132 dpll_md_reg = DPLL_A_MD;
134 dpll_md_reg = DPLL_B_MD;
136 if (HAS_PCH_SPLIT(dev))
142 * Disable separate mode multiplier used when cloning SDVO to CRT
143 * XXX this needs to be adjusted when we really are cloning
145 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
146 dpll_md = I915_READ(dpll_md_reg);
147 I915_WRITE(dpll_md_reg,
148 dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
151 adpa = ADPA_HOTPLUG_BITS;
152 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
153 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
154 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
155 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
157 if (intel_crtc->pipe == 0) {
158 if (HAS_PCH_CPT(dev))
159 adpa |= PORT_TRANS_A_SEL_CPT;
161 adpa |= ADPA_PIPE_A_SELECT;
162 if (!HAS_PCH_SPLIT(dev))
163 I915_WRITE(BCLRPAT_A, 0);
165 if (HAS_PCH_CPT(dev))
166 adpa |= PORT_TRANS_B_SEL_CPT;
168 adpa |= ADPA_PIPE_B_SELECT;
169 if (!HAS_PCH_SPLIT(dev))
170 I915_WRITE(BCLRPAT_B, 0);
173 I915_WRITE(adpa_reg, adpa);
176 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
178 struct drm_device *dev = connector->dev;
179 struct intel_crt *crt = intel_attached_crt(connector);
180 struct drm_i915_private *dev_priv = dev->dev_private;
184 /* The first time through, trigger an explicit detection cycle */
185 if (crt->force_hotplug_required) {
186 bool turn_off_dac = HAS_PCH_SPLIT(dev);
189 crt->force_hotplug_required = 0;
191 save_adpa = adpa = I915_READ(PCH_ADPA);
192 DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);
194 adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
196 adpa &= ~ADPA_DAC_ENABLE;
198 I915_WRITE(PCH_ADPA, adpa);
200 if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
202 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
205 I915_WRITE(PCH_ADPA, save_adpa);
206 POSTING_READ(PCH_ADPA);
210 /* Check the status to see if both blue and green are on now */
211 adpa = I915_READ(PCH_ADPA);
212 if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
216 DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret);
222 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
224 * Not for i915G/i915GM
226 * \return true if CRT is connected.
227 * \return false if CRT is disconnected.
229 static bool intel_crt_detect_hotplug(struct drm_connector *connector)
231 struct drm_device *dev = connector->dev;
232 struct drm_i915_private *dev_priv = dev->dev_private;
233 u32 hotplug_en, orig, stat;
237 if (HAS_PCH_SPLIT(dev))
238 return intel_ironlake_crt_detect_hotplug(connector);
241 * On 4 series desktop, CRT detect sequence need to be done twice
242 * to get a reliable result.
245 if (IS_G4X(dev) && !IS_GM45(dev))
249 hotplug_en = orig = I915_READ(PORT_HOTPLUG_EN);
250 hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
252 for (i = 0; i < tries ; i++) {
253 /* turn on the FORCE_DETECT */
254 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
255 /* wait for FORCE_DETECT to go off */
256 if (wait_for((I915_READ(PORT_HOTPLUG_EN) &
257 CRT_HOTPLUG_FORCE_DETECT) == 0,
259 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
262 stat = I915_READ(PORT_HOTPLUG_STAT);
263 if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
266 /* clear the interrupt we just generated, if any */
267 I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
269 /* and put the bits back */
270 I915_WRITE(PORT_HOTPLUG_EN, orig);
275 static bool intel_crt_ddc_probe(struct drm_i915_private *dev_priv, int ddc_bus)
278 struct i2c_msg msgs[] = {
286 /* DDC monitor detect: Does it ACK a write to 0xA0? */
287 return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 1) == 1;
290 static bool intel_crt_detect_ddc(struct intel_crt *crt)
292 struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private;
294 /* CRT should always be at 0, but check anyway */
295 if (crt->base.type != INTEL_OUTPUT_ANALOG)
298 if (intel_crt_ddc_probe(dev_priv, dev_priv->crt_ddc_pin)) {
299 DRM_DEBUG_KMS("CRT detected via DDC:0xa0\n");
303 if (intel_ddc_probe(&crt->base, dev_priv->crt_ddc_pin)) {
304 DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
311 static enum drm_connector_status
312 intel_crt_load_detect(struct drm_crtc *crtc, struct intel_crt *crt)
314 struct drm_encoder *encoder = &crt->base.base;
315 struct drm_device *dev = encoder->dev;
316 struct drm_i915_private *dev_priv = dev->dev_private;
317 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
318 uint32_t pipe = intel_crtc->pipe;
319 uint32_t save_bclrpat;
320 uint32_t save_vtotal;
321 uint32_t vtotal, vactive;
323 uint32_t vblank, vblank_start, vblank_end;
325 uint32_t bclrpat_reg;
329 uint32_t pipeconf_reg;
330 uint32_t pipe_dsl_reg;
332 enum drm_connector_status status;
334 DRM_DEBUG_KMS("starting load-detect on CRT\n");
337 bclrpat_reg = BCLRPAT_A;
338 vtotal_reg = VTOTAL_A;
339 vblank_reg = VBLANK_A;
341 pipeconf_reg = PIPEACONF;
342 pipe_dsl_reg = PIPEADSL;
344 bclrpat_reg = BCLRPAT_B;
345 vtotal_reg = VTOTAL_B;
346 vblank_reg = VBLANK_B;
348 pipeconf_reg = PIPEBCONF;
349 pipe_dsl_reg = PIPEBDSL;
352 save_bclrpat = I915_READ(bclrpat_reg);
353 save_vtotal = I915_READ(vtotal_reg);
354 vblank = I915_READ(vblank_reg);
356 vtotal = ((save_vtotal >> 16) & 0xfff) + 1;
357 vactive = (save_vtotal & 0x7ff) + 1;
359 vblank_start = (vblank & 0xfff) + 1;
360 vblank_end = ((vblank >> 16) & 0xfff) + 1;
362 /* Set the border color to purple. */
363 I915_WRITE(bclrpat_reg, 0x500050);
366 uint32_t pipeconf = I915_READ(pipeconf_reg);
367 I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
368 POSTING_READ(pipeconf_reg);
369 /* Wait for next Vblank to substitue
370 * border color for Color info */
371 intel_wait_for_vblank(dev, pipe);
372 st00 = I915_READ8(VGA_MSR_WRITE);
373 status = ((st00 & (1 << 4)) != 0) ?
374 connector_status_connected :
375 connector_status_disconnected;
377 I915_WRITE(pipeconf_reg, pipeconf);
379 bool restore_vblank = false;
383 * If there isn't any border, add some.
384 * Yes, this will flicker
386 if (vblank_start <= vactive && vblank_end >= vtotal) {
387 uint32_t vsync = I915_READ(vsync_reg);
388 uint32_t vsync_start = (vsync & 0xffff) + 1;
390 vblank_start = vsync_start;
391 I915_WRITE(vblank_reg,
393 ((vblank_end - 1) << 16));
394 restore_vblank = true;
396 /* sample in the vertical border, selecting the larger one */
397 if (vblank_start - vactive >= vtotal - vblank_end)
398 vsample = (vblank_start + vactive) >> 1;
400 vsample = (vtotal + vblank_end) >> 1;
403 * Wait for the border to be displayed
405 while (I915_READ(pipe_dsl_reg) >= vactive)
407 while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample)
410 * Watch ST00 for an entire scanline
416 /* Read the ST00 VGA status register */
417 st00 = I915_READ8(VGA_MSR_WRITE);
420 } while ((I915_READ(pipe_dsl_reg) == dsl));
422 /* restore vblank if necessary */
424 I915_WRITE(vblank_reg, vblank);
426 * If more than 3/4 of the scanline detected a monitor,
427 * then it is assumed to be present. This works even on i830,
428 * where there isn't any way to force the border color across
431 status = detect * 4 > count * 3 ?
432 connector_status_connected :
433 connector_status_disconnected;
436 /* Restore previous settings */
437 I915_WRITE(bclrpat_reg, save_bclrpat);
442 static enum drm_connector_status
443 intel_crt_detect(struct drm_connector *connector, bool force)
445 struct drm_device *dev = connector->dev;
446 struct intel_crt *crt = intel_attached_crt(connector);
447 struct drm_crtc *crtc;
449 enum drm_connector_status status;
451 if (I915_HAS_HOTPLUG(dev)) {
452 if (intel_crt_detect_hotplug(connector)) {
453 DRM_DEBUG_KMS("CRT detected via hotplug\n");
454 return connector_status_connected;
456 DRM_DEBUG_KMS("CRT not detected via hotplug\n");
457 return connector_status_disconnected;
461 if (intel_crt_detect_ddc(crt))
462 return connector_status_connected;
465 return connector->status;
467 /* for pre-945g platforms use load detect */
468 crtc = crt->base.base.crtc;
469 if (crtc && crtc->enabled) {
470 status = intel_crt_load_detect(crtc, crt);
472 crtc = intel_get_load_detect_pipe(&crt->base, connector,
475 if (intel_crt_detect_ddc(crt))
476 status = connector_status_connected;
478 status = intel_crt_load_detect(crtc, crt);
479 intel_release_load_detect_pipe(&crt->base,
480 connector, dpms_mode);
482 status = connector_status_unknown;
488 static void intel_crt_destroy(struct drm_connector *connector)
490 drm_sysfs_connector_remove(connector);
491 drm_connector_cleanup(connector);
495 static int intel_crt_get_modes(struct drm_connector *connector)
497 struct drm_device *dev = connector->dev;
498 struct drm_i915_private *dev_priv = dev->dev_private;
501 ret = intel_ddc_get_modes(connector,
502 &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter);
503 if (ret || !IS_G4X(dev))
506 /* Try to probe digital port for output in DVI-I -> VGA mode. */
507 return intel_ddc_get_modes(connector,
508 &dev_priv->gmbus[GMBUS_PORT_DPB].adapter);
511 static int intel_crt_set_property(struct drm_connector *connector,
512 struct drm_property *property,
519 * Routines for controlling stuff on the analog port
522 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = {
523 .dpms = intel_crt_dpms,
524 .mode_fixup = intel_crt_mode_fixup,
525 .prepare = intel_encoder_prepare,
526 .commit = intel_encoder_commit,
527 .mode_set = intel_crt_mode_set,
530 static const struct drm_connector_funcs intel_crt_connector_funcs = {
531 .dpms = drm_helper_connector_dpms,
532 .detect = intel_crt_detect,
533 .fill_modes = drm_helper_probe_single_connector_modes,
534 .destroy = intel_crt_destroy,
535 .set_property = intel_crt_set_property,
538 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
539 .mode_valid = intel_crt_mode_valid,
540 .get_modes = intel_crt_get_modes,
541 .best_encoder = intel_best_encoder,
544 static const struct drm_encoder_funcs intel_crt_enc_funcs = {
545 .destroy = intel_encoder_destroy,
548 void intel_crt_init(struct drm_device *dev)
550 struct drm_connector *connector;
551 struct intel_crt *crt;
552 struct intel_connector *intel_connector;
553 struct drm_i915_private *dev_priv = dev->dev_private;
555 crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL);
559 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
560 if (!intel_connector) {
565 connector = &intel_connector->base;
566 drm_connector_init(dev, &intel_connector->base,
567 &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
569 drm_encoder_init(dev, &crt->base.base, &intel_crt_enc_funcs,
570 DRM_MODE_ENCODER_DAC);
572 intel_connector_attach_encoder(intel_connector, &crt->base);
574 crt->base.type = INTEL_OUTPUT_ANALOG;
575 crt->base.clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT |
576 1 << INTEL_ANALOG_CLONE_BIT |
577 1 << INTEL_SDVO_LVDS_CLONE_BIT);
578 crt->base.crtc_mask = (1 << 0) | (1 << 1);
579 connector->interlace_allowed = 1;
580 connector->doublescan_allowed = 0;
582 drm_encoder_helper_add(&crt->base.base, &intel_crt_helper_funcs);
583 drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
585 drm_sysfs_connector_add(connector);
587 if (I915_HAS_HOTPLUG(dev))
588 connector->polled = DRM_CONNECTOR_POLL_HPD;
590 connector->polled = DRM_CONNECTOR_POLL_CONNECT;
593 * Configure the automatic hotplug detection stuff
595 crt->force_hotplug_required = 0;
596 if (HAS_PCH_SPLIT(dev)) {
599 adpa = I915_READ(PCH_ADPA);
600 adpa &= ~ADPA_CRT_HOTPLUG_MASK;
601 adpa |= ADPA_HOTPLUG_BITS;
602 I915_WRITE(PCH_ADPA, adpa);
603 POSTING_READ(PCH_ADPA);
605 DRM_DEBUG_KMS("pch crt adpa set to 0x%x\n", adpa);
606 crt->force_hotplug_required = 1;
609 dev_priv->hotplug_supported_mask |= CRT_HOTPLUG_INT_STATUS;