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 static void intel_crt_dpms(struct drm_encoder *encoder, int mode)
39 struct drm_device *dev = encoder->dev;
40 struct drm_i915_private *dev_priv = dev->dev_private;
43 if (HAS_PCH_SPLIT(dev))
48 temp = I915_READ(reg);
49 temp &= ~(ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
50 temp &= ~ADPA_DAC_ENABLE;
53 case DRM_MODE_DPMS_ON:
54 temp |= ADPA_DAC_ENABLE;
56 case DRM_MODE_DPMS_STANDBY:
57 temp |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
59 case DRM_MODE_DPMS_SUSPEND:
60 temp |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
62 case DRM_MODE_DPMS_OFF:
63 temp |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
67 I915_WRITE(reg, temp);
70 static int intel_crt_mode_valid(struct drm_connector *connector,
71 struct drm_display_mode *mode)
73 struct drm_device *dev = connector->dev;
76 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
77 return MODE_NO_DBLESCAN;
79 if (mode->clock < 25000)
80 return MODE_CLOCK_LOW;
86 if (mode->clock > max_clock)
87 return MODE_CLOCK_HIGH;
92 static bool intel_crt_mode_fixup(struct drm_encoder *encoder,
93 struct drm_display_mode *mode,
94 struct drm_display_mode *adjusted_mode)
99 static void intel_crt_mode_set(struct drm_encoder *encoder,
100 struct drm_display_mode *mode,
101 struct drm_display_mode *adjusted_mode)
104 struct drm_device *dev = encoder->dev;
105 struct drm_crtc *crtc = encoder->crtc;
106 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
107 struct drm_i915_private *dev_priv = dev->dev_private;
112 if (intel_crtc->pipe == 0)
113 dpll_md_reg = DPLL_A_MD;
115 dpll_md_reg = DPLL_B_MD;
117 if (HAS_PCH_SPLIT(dev))
123 * Disable separate mode multiplier used when cloning SDVO to CRT
124 * XXX this needs to be adjusted when we really are cloning
126 if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev)) {
127 dpll_md = I915_READ(dpll_md_reg);
128 I915_WRITE(dpll_md_reg,
129 dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK);
133 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
134 adpa |= ADPA_HSYNC_ACTIVE_HIGH;
135 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
136 adpa |= ADPA_VSYNC_ACTIVE_HIGH;
138 if (intel_crtc->pipe == 0) {
139 if (HAS_PCH_CPT(dev))
140 adpa |= PORT_TRANS_A_SEL_CPT;
142 adpa |= ADPA_PIPE_A_SELECT;
143 if (!HAS_PCH_SPLIT(dev))
144 I915_WRITE(BCLRPAT_A, 0);
146 if (HAS_PCH_CPT(dev))
147 adpa |= PORT_TRANS_B_SEL_CPT;
149 adpa |= ADPA_PIPE_B_SELECT;
150 if (!HAS_PCH_SPLIT(dev))
151 I915_WRITE(BCLRPAT_B, 0);
154 I915_WRITE(adpa_reg, adpa);
157 static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
159 struct drm_device *dev = connector->dev;
160 struct drm_i915_private *dev_priv = dev->dev_private;
163 bool turn_off_dac = false;
165 temp = adpa = I915_READ(PCH_ADPA);
167 if (HAS_PCH_SPLIT(dev))
170 adpa &= ~ADPA_CRT_HOTPLUG_MASK;
172 adpa &= ~ADPA_DAC_ENABLE;
174 /* disable HPD first */
175 I915_WRITE(PCH_ADPA, adpa);
176 (void)I915_READ(PCH_ADPA);
178 adpa |= (ADPA_CRT_HOTPLUG_PERIOD_128 |
179 ADPA_CRT_HOTPLUG_WARMUP_10MS |
180 ADPA_CRT_HOTPLUG_SAMPLE_4S |
181 ADPA_CRT_HOTPLUG_VOLTAGE_50 | /* default */
182 ADPA_CRT_HOTPLUG_VOLREF_325MV |
183 ADPA_CRT_HOTPLUG_ENABLE |
184 ADPA_CRT_HOTPLUG_FORCE_TRIGGER);
186 DRM_DEBUG_KMS("pch crt adpa 0x%x", adpa);
187 I915_WRITE(PCH_ADPA, adpa);
189 if (wait_for((I915_READ(PCH_ADPA) & ADPA_CRT_HOTPLUG_FORCE_TRIGGER) == 0,
191 DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
194 I915_WRITE(PCH_ADPA, temp);
195 (void)I915_READ(PCH_ADPA);
198 /* Check the status to see if both blue and green are on now */
199 adpa = I915_READ(PCH_ADPA);
200 adpa &= ADPA_CRT_HOTPLUG_MONITOR_MASK;
201 if ((adpa == ADPA_CRT_HOTPLUG_MONITOR_COLOR) ||
202 (adpa == ADPA_CRT_HOTPLUG_MONITOR_MONO))
211 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
213 * Not for i915G/i915GM
215 * \return true if CRT is connected.
216 * \return false if CRT is disconnected.
218 static bool intel_crt_detect_hotplug(struct drm_connector *connector)
220 struct drm_device *dev = connector->dev;
221 struct drm_i915_private *dev_priv = dev->dev_private;
222 u32 hotplug_en, orig, stat;
226 if (HAS_PCH_SPLIT(dev))
227 return intel_ironlake_crt_detect_hotplug(connector);
230 * On 4 series desktop, CRT detect sequence need to be done twice
231 * to get a reliable result.
234 if (IS_G4X(dev) && !IS_GM45(dev))
238 hotplug_en = orig = I915_READ(PORT_HOTPLUG_EN);
239 hotplug_en |= CRT_HOTPLUG_FORCE_DETECT;
241 for (i = 0; i < tries ; i++) {
242 /* turn on the FORCE_DETECT */
243 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
244 /* wait for FORCE_DETECT to go off */
245 if (wait_for((I915_READ(PORT_HOTPLUG_EN) &
246 CRT_HOTPLUG_FORCE_DETECT) == 0,
248 DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
251 stat = I915_READ(PORT_HOTPLUG_STAT);
252 if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
255 /* clear the interrupt we just generated, if any */
256 I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);
258 /* and put the bits back */
259 I915_WRITE(PORT_HOTPLUG_EN, orig);
264 static bool intel_crt_detect_ddc(struct drm_encoder *encoder)
266 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
268 /* CRT should always be at 0, but check anyway */
269 if (intel_encoder->type != INTEL_OUTPUT_ANALOG)
272 return intel_ddc_probe(intel_encoder);
275 static enum drm_connector_status
276 intel_crt_load_detect(struct drm_crtc *crtc, struct intel_encoder *intel_encoder)
278 struct drm_encoder *encoder = &intel_encoder->enc;
279 struct drm_device *dev = encoder->dev;
280 struct drm_i915_private *dev_priv = dev->dev_private;
281 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
282 uint32_t pipe = intel_crtc->pipe;
283 uint32_t save_bclrpat;
284 uint32_t save_vtotal;
285 uint32_t vtotal, vactive;
287 uint32_t vblank, vblank_start, vblank_end;
289 uint32_t bclrpat_reg;
293 uint32_t pipeconf_reg;
294 uint32_t pipe_dsl_reg;
296 enum drm_connector_status status;
299 bclrpat_reg = BCLRPAT_A;
300 vtotal_reg = VTOTAL_A;
301 vblank_reg = VBLANK_A;
303 pipeconf_reg = PIPEACONF;
304 pipe_dsl_reg = PIPEADSL;
306 bclrpat_reg = BCLRPAT_B;
307 vtotal_reg = VTOTAL_B;
308 vblank_reg = VBLANK_B;
310 pipeconf_reg = PIPEBCONF;
311 pipe_dsl_reg = PIPEBDSL;
314 save_bclrpat = I915_READ(bclrpat_reg);
315 save_vtotal = I915_READ(vtotal_reg);
316 vblank = I915_READ(vblank_reg);
318 vtotal = ((save_vtotal >> 16) & 0xfff) + 1;
319 vactive = (save_vtotal & 0x7ff) + 1;
321 vblank_start = (vblank & 0xfff) + 1;
322 vblank_end = ((vblank >> 16) & 0xfff) + 1;
324 /* Set the border color to purple. */
325 I915_WRITE(bclrpat_reg, 0x500050);
328 uint32_t pipeconf = I915_READ(pipeconf_reg);
329 I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
330 /* Wait for next Vblank to substitue
331 * border color for Color info */
332 intel_wait_for_vblank(dev, pipe);
333 st00 = I915_READ8(VGA_MSR_WRITE);
334 status = ((st00 & (1 << 4)) != 0) ?
335 connector_status_connected :
336 connector_status_disconnected;
338 I915_WRITE(pipeconf_reg, pipeconf);
340 bool restore_vblank = false;
344 * If there isn't any border, add some.
345 * Yes, this will flicker
347 if (vblank_start <= vactive && vblank_end >= vtotal) {
348 uint32_t vsync = I915_READ(vsync_reg);
349 uint32_t vsync_start = (vsync & 0xffff) + 1;
351 vblank_start = vsync_start;
352 I915_WRITE(vblank_reg,
354 ((vblank_end - 1) << 16));
355 restore_vblank = true;
357 /* sample in the vertical border, selecting the larger one */
358 if (vblank_start - vactive >= vtotal - vblank_end)
359 vsample = (vblank_start + vactive) >> 1;
361 vsample = (vtotal + vblank_end) >> 1;
364 * Wait for the border to be displayed
366 while (I915_READ(pipe_dsl_reg) >= vactive)
368 while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample)
371 * Watch ST00 for an entire scanline
377 /* Read the ST00 VGA status register */
378 st00 = I915_READ8(VGA_MSR_WRITE);
381 } while ((I915_READ(pipe_dsl_reg) == dsl));
383 /* restore vblank if necessary */
385 I915_WRITE(vblank_reg, vblank);
387 * If more than 3/4 of the scanline detected a monitor,
388 * then it is assumed to be present. This works even on i830,
389 * where there isn't any way to force the border color across
392 status = detect * 4 > count * 3 ?
393 connector_status_connected :
394 connector_status_disconnected;
397 /* Restore previous settings */
398 I915_WRITE(bclrpat_reg, save_bclrpat);
403 static enum drm_connector_status
404 intel_crt_detect(struct drm_connector *connector, bool force)
406 struct drm_device *dev = connector->dev;
407 struct drm_encoder *encoder = intel_attached_encoder(connector);
408 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
409 struct drm_crtc *crtc;
411 enum drm_connector_status status;
413 if (IS_I9XX(dev) && !IS_I915G(dev) && !IS_I915GM(dev)) {
414 if (intel_crt_detect_hotplug(connector))
415 return connector_status_connected;
417 return connector_status_disconnected;
420 if (intel_crt_detect_ddc(encoder))
421 return connector_status_connected;
424 return connector->status;
426 /* for pre-945g platforms use load detect */
427 if (encoder->crtc && encoder->crtc->enabled) {
428 status = intel_crt_load_detect(encoder->crtc, intel_encoder);
430 crtc = intel_get_load_detect_pipe(intel_encoder, connector,
433 status = intel_crt_load_detect(crtc, intel_encoder);
434 intel_release_load_detect_pipe(intel_encoder,
435 connector, dpms_mode);
437 status = connector_status_unknown;
443 static void intel_crt_destroy(struct drm_connector *connector)
445 drm_sysfs_connector_remove(connector);
446 drm_connector_cleanup(connector);
450 static int intel_crt_get_modes(struct drm_connector *connector)
453 struct drm_encoder *encoder = intel_attached_encoder(connector);
454 struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
455 struct i2c_adapter *ddc_bus;
456 struct drm_device *dev = connector->dev;
459 ret = intel_ddc_get_modes(connector, intel_encoder->ddc_bus);
460 if (ret || !IS_G4X(dev))
463 /* Try to probe digital port for output in DVI-I -> VGA mode. */
464 ddc_bus = intel_i2c_create(connector->dev, GPIOD, "CRTDDC_D");
467 dev_printk(KERN_ERR, &connector->dev->pdev->dev,
468 "DDC bus registration failed for CRTDDC_D.\n");
471 /* Try to get modes by GPIOD port */
472 ret = intel_ddc_get_modes(connector, ddc_bus);
473 intel_i2c_destroy(ddc_bus);
480 static int intel_crt_set_property(struct drm_connector *connector,
481 struct drm_property *property,
488 * Routines for controlling stuff on the analog port
491 static const struct drm_encoder_helper_funcs intel_crt_helper_funcs = {
492 .dpms = intel_crt_dpms,
493 .mode_fixup = intel_crt_mode_fixup,
494 .prepare = intel_encoder_prepare,
495 .commit = intel_encoder_commit,
496 .mode_set = intel_crt_mode_set,
499 static const struct drm_connector_funcs intel_crt_connector_funcs = {
500 .dpms = drm_helper_connector_dpms,
501 .detect = intel_crt_detect,
502 .fill_modes = drm_helper_probe_single_connector_modes,
503 .destroy = intel_crt_destroy,
504 .set_property = intel_crt_set_property,
507 static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
508 .mode_valid = intel_crt_mode_valid,
509 .get_modes = intel_crt_get_modes,
510 .best_encoder = intel_attached_encoder,
513 static const struct drm_encoder_funcs intel_crt_enc_funcs = {
514 .destroy = intel_encoder_destroy,
517 void intel_crt_init(struct drm_device *dev)
519 struct drm_connector *connector;
520 struct intel_encoder *intel_encoder;
521 struct intel_connector *intel_connector;
522 struct drm_i915_private *dev_priv = dev->dev_private;
525 intel_encoder = kzalloc(sizeof(struct intel_encoder), GFP_KERNEL);
529 intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
530 if (!intel_connector) {
531 kfree(intel_encoder);
535 connector = &intel_connector->base;
536 drm_connector_init(dev, &intel_connector->base,
537 &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);
539 drm_encoder_init(dev, &intel_encoder->enc, &intel_crt_enc_funcs,
540 DRM_MODE_ENCODER_DAC);
542 drm_mode_connector_attach_encoder(&intel_connector->base,
543 &intel_encoder->enc);
545 /* Set up the DDC bus. */
546 if (HAS_PCH_SPLIT(dev))
550 /* Use VBT information for CRT DDC if available */
551 if (dev_priv->crt_ddc_bus != 0)
552 i2c_reg = dev_priv->crt_ddc_bus;
554 intel_encoder->ddc_bus = intel_i2c_create(dev, i2c_reg, "CRTDDC_A");
555 if (!intel_encoder->ddc_bus) {
556 dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
561 intel_encoder->type = INTEL_OUTPUT_ANALOG;
562 intel_encoder->clone_mask = (1 << INTEL_SDVO_NON_TV_CLONE_BIT) |
563 (1 << INTEL_ANALOG_CLONE_BIT) |
564 (1 << INTEL_SDVO_LVDS_CLONE_BIT);
565 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
566 connector->interlace_allowed = 1;
567 connector->doublescan_allowed = 0;
569 drm_encoder_helper_add(&intel_encoder->enc, &intel_crt_helper_funcs);
570 drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);
572 drm_sysfs_connector_add(connector);
574 if (I915_HAS_HOTPLUG(dev))
575 connector->polled = DRM_CONNECTOR_POLL_HPD;
577 connector->polled = DRM_CONNECTOR_POLL_CONNECT;
579 dev_priv->hotplug_supported_mask |= CRT_HOTPLUG_INT_STATUS;