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_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
,
75 .gpio
= GMBUS_PORT_DPB
,
76 .dev_ops
= &ch7017_ops
,
79 .type
= INTEL_DVO_CHIP_TMDS
,
82 .slave_addr
= NS2501_ADDR
,
83 .dev_ops
= &ns2501_ops
,
88 struct intel_encoder base
;
90 struct intel_dvo_device dev
;
92 struct drm_display_mode
*panel_fixed_mode
;
93 bool panel_wants_dither
;
96 static struct intel_dvo
*enc_to_intel_dvo(struct drm_encoder
*encoder
)
98 return container_of(encoder
, struct intel_dvo
, base
.base
);
101 static struct intel_dvo
*intel_attached_dvo(struct drm_connector
*connector
)
103 return container_of(intel_attached_encoder(connector
),
104 struct intel_dvo
, base
);
107 static bool intel_dvo_connector_get_hw_state(struct intel_connector
*connector
)
109 struct intel_dvo
*intel_dvo
= intel_attached_dvo(&connector
->base
);
111 return intel_dvo
->dev
.dev_ops
->get_hw_state(&intel_dvo
->dev
);
114 static bool intel_dvo_get_hw_state(struct intel_encoder
*encoder
,
117 struct drm_device
*dev
= encoder
->base
.dev
;
118 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
119 struct intel_dvo
*intel_dvo
= enc_to_intel_dvo(&encoder
->base
);
122 tmp
= I915_READ(intel_dvo
->dev
.dvo_reg
);
124 if (!(tmp
& DVO_ENABLE
))
127 *pipe
= PORT_TO_PIPE(tmp
);
132 static void intel_disable_dvo(struct intel_encoder
*encoder
)
134 struct drm_i915_private
*dev_priv
= encoder
->base
.dev
->dev_private
;
135 struct intel_dvo
*intel_dvo
= enc_to_intel_dvo(&encoder
->base
);
136 u32 dvo_reg
= intel_dvo
->dev
.dvo_reg
;
137 u32 temp
= I915_READ(dvo_reg
);
139 intel_dvo
->dev
.dev_ops
->dpms(&intel_dvo
->dev
, false);
140 I915_WRITE(dvo_reg
, temp
& ~DVO_ENABLE
);
144 static void intel_enable_dvo(struct intel_encoder
*encoder
)
146 struct drm_i915_private
*dev_priv
= encoder
->base
.dev
->dev_private
;
147 struct intel_dvo
*intel_dvo
= enc_to_intel_dvo(&encoder
->base
);
148 u32 dvo_reg
= intel_dvo
->dev
.dvo_reg
;
149 u32 temp
= I915_READ(dvo_reg
);
151 I915_WRITE(dvo_reg
, temp
| DVO_ENABLE
);
153 intel_dvo
->dev
.dev_ops
->dpms(&intel_dvo
->dev
, true);
156 static void intel_dvo_dpms(struct drm_connector
*connector
, int mode
)
158 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
159 struct drm_crtc
*crtc
;
161 /* dvo supports only 2 dpms states. */
162 if (mode
!= DRM_MODE_DPMS_ON
)
163 mode
= DRM_MODE_DPMS_OFF
;
165 if (mode
== connector
->dpms
)
168 connector
->dpms
= mode
;
170 /* Only need to change hw state when actually enabled */
171 crtc
= intel_dvo
->base
.base
.crtc
;
173 intel_dvo
->base
.connectors_active
= false;
177 if (mode
== DRM_MODE_DPMS_ON
) {
178 intel_dvo
->base
.connectors_active
= true;
180 intel_crtc_update_dpms(crtc
);
182 intel_dvo
->dev
.dev_ops
->dpms(&intel_dvo
->dev
, true);
184 intel_dvo
->dev
.dev_ops
->dpms(&intel_dvo
->dev
, false);
186 intel_dvo
->base
.connectors_active
= false;
188 intel_crtc_update_dpms(crtc
);
191 intel_modeset_check_state(connector
->dev
);
194 static int intel_dvo_mode_valid(struct drm_connector
*connector
,
195 struct drm_display_mode
*mode
)
197 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
199 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
200 return MODE_NO_DBLESCAN
;
202 /* XXX: Validate clock range */
204 if (intel_dvo
->panel_fixed_mode
) {
205 if (mode
->hdisplay
> intel_dvo
->panel_fixed_mode
->hdisplay
)
207 if (mode
->vdisplay
> intel_dvo
->panel_fixed_mode
->vdisplay
)
211 return intel_dvo
->dev
.dev_ops
->mode_valid(&intel_dvo
->dev
, mode
);
214 static bool intel_dvo_mode_fixup(struct drm_encoder
*encoder
,
215 const struct drm_display_mode
*mode
,
216 struct drm_display_mode
*adjusted_mode
)
218 struct intel_dvo
*intel_dvo
= enc_to_intel_dvo(encoder
);
220 /* If we have timings from the BIOS for the panel, put them in
221 * to the adjusted mode. The CRTC will be set up for this mode,
222 * with the panel scaling set up to source from the H/VDisplay
223 * of the original mode.
225 if (intel_dvo
->panel_fixed_mode
!= NULL
) {
226 #define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
239 if (intel_dvo
->dev
.dev_ops
->mode_fixup
)
240 return intel_dvo
->dev
.dev_ops
->mode_fixup(&intel_dvo
->dev
, mode
, adjusted_mode
);
245 static void intel_dvo_mode_set(struct drm_encoder
*encoder
,
246 struct drm_display_mode
*mode
,
247 struct drm_display_mode
*adjusted_mode
)
249 struct drm_device
*dev
= encoder
->dev
;
250 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
251 struct intel_crtc
*intel_crtc
= to_intel_crtc(encoder
->crtc
);
252 struct intel_dvo
*intel_dvo
= enc_to_intel_dvo(encoder
);
253 int pipe
= intel_crtc
->pipe
;
255 u32 dvo_reg
= intel_dvo
->dev
.dvo_reg
, dvo_srcdim_reg
;
256 int dpll_reg
= DPLL(pipe
);
261 dvo_srcdim_reg
= DVOA_SRCDIM
;
264 dvo_srcdim_reg
= DVOB_SRCDIM
;
267 dvo_srcdim_reg
= DVOC_SRCDIM
;
271 intel_dvo
->dev
.dev_ops
->mode_set(&intel_dvo
->dev
, mode
, adjusted_mode
);
273 /* Save the data order, since I don't know what it should be set to. */
274 dvo_val
= I915_READ(dvo_reg
) &
275 (DVO_PRESERVE_MASK
| DVO_DATA_ORDER_GBRG
);
276 dvo_val
|= DVO_DATA_ORDER_FP
| DVO_BORDER_ENABLE
|
277 DVO_BLANK_ACTIVE_HIGH
;
280 dvo_val
|= DVO_PIPE_B_SELECT
;
281 dvo_val
|= DVO_PIPE_STALL
;
282 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
283 dvo_val
|= DVO_HSYNC_ACTIVE_HIGH
;
284 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
285 dvo_val
|= DVO_VSYNC_ACTIVE_HIGH
;
287 I915_WRITE(dpll_reg
, I915_READ(dpll_reg
) | DPLL_DVO_HIGH_SPEED
);
289 /*I915_WRITE(DVOB_SRCDIM,
290 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
291 (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
292 I915_WRITE(dvo_srcdim_reg
,
293 (adjusted_mode
->hdisplay
<< DVO_SRCDIM_HORIZONTAL_SHIFT
) |
294 (adjusted_mode
->vdisplay
<< DVO_SRCDIM_VERTICAL_SHIFT
));
295 /*I915_WRITE(DVOB, dvo_val);*/
296 I915_WRITE(dvo_reg
, dvo_val
);
300 * Detect the output connection on our DVO device.
304 static enum drm_connector_status
305 intel_dvo_detect(struct drm_connector
*connector
, bool force
)
307 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
308 return intel_dvo
->dev
.dev_ops
->detect(&intel_dvo
->dev
);
311 static int intel_dvo_get_modes(struct drm_connector
*connector
)
313 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
314 struct drm_i915_private
*dev_priv
= connector
->dev
->dev_private
;
316 /* We should probably have an i2c driver get_modes function for those
317 * devices which will have a fixed set of modes determined by the chip
318 * (TV-out, for example), but for now with just TMDS and LVDS,
319 * that's not the case.
321 intel_ddc_get_modes(connector
,
322 intel_gmbus_get_adapter(dev_priv
, GMBUS_PORT_DPC
));
323 if (!list_empty(&connector
->probed_modes
))
326 if (intel_dvo
->panel_fixed_mode
!= NULL
) {
327 struct drm_display_mode
*mode
;
328 mode
= drm_mode_duplicate(connector
->dev
, intel_dvo
->panel_fixed_mode
);
330 drm_mode_probed_add(connector
, mode
);
338 static void intel_dvo_destroy(struct drm_connector
*connector
)
340 drm_sysfs_connector_remove(connector
);
341 drm_connector_cleanup(connector
);
345 static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs
= {
346 .mode_fixup
= intel_dvo_mode_fixup
,
347 .mode_set
= intel_dvo_mode_set
,
350 static const struct drm_connector_funcs intel_dvo_connector_funcs
= {
351 .dpms
= intel_dvo_dpms
,
352 .detect
= intel_dvo_detect
,
353 .destroy
= intel_dvo_destroy
,
354 .fill_modes
= drm_helper_probe_single_connector_modes
,
357 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs
= {
358 .mode_valid
= intel_dvo_mode_valid
,
359 .get_modes
= intel_dvo_get_modes
,
360 .best_encoder
= intel_best_encoder
,
363 static void intel_dvo_enc_destroy(struct drm_encoder
*encoder
)
365 struct intel_dvo
*intel_dvo
= enc_to_intel_dvo(encoder
);
367 if (intel_dvo
->dev
.dev_ops
->destroy
)
368 intel_dvo
->dev
.dev_ops
->destroy(&intel_dvo
->dev
);
370 kfree(intel_dvo
->panel_fixed_mode
);
372 intel_encoder_destroy(encoder
);
375 static const struct drm_encoder_funcs intel_dvo_enc_funcs
= {
376 .destroy
= intel_dvo_enc_destroy
,
380 * Attempts to get a fixed panel timing for LVDS (currently only the i830).
382 * Other chips with DVO LVDS will need to extend this to deal with the LVDS
383 * chip being on DVOB/C and having multiple pipes.
385 static struct drm_display_mode
*
386 intel_dvo_get_current_mode(struct drm_connector
*connector
)
388 struct drm_device
*dev
= connector
->dev
;
389 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
390 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
391 uint32_t dvo_val
= I915_READ(intel_dvo
->dev
.dvo_reg
);
392 struct drm_display_mode
*mode
= NULL
;
394 /* If the DVO port is active, that'll be the LVDS, so we can pull out
395 * its timings to get how the BIOS set up the panel.
397 if (dvo_val
& DVO_ENABLE
) {
398 struct drm_crtc
*crtc
;
399 int pipe
= (dvo_val
& DVO_PIPE_B_SELECT
) ? 1 : 0;
401 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
403 mode
= intel_crtc_mode_get(dev
, crtc
);
405 mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
406 if (dvo_val
& DVO_HSYNC_ACTIVE_HIGH
)
407 mode
->flags
|= DRM_MODE_FLAG_PHSYNC
;
408 if (dvo_val
& DVO_VSYNC_ACTIVE_HIGH
)
409 mode
->flags
|= DRM_MODE_FLAG_PVSYNC
;
417 void intel_dvo_init(struct drm_device
*dev
)
419 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
420 struct intel_encoder
*intel_encoder
;
421 struct intel_dvo
*intel_dvo
;
422 struct intel_connector
*intel_connector
;
424 int encoder_type
= DRM_MODE_ENCODER_NONE
;
426 intel_dvo
= kzalloc(sizeof(struct intel_dvo
), GFP_KERNEL
);
430 intel_connector
= kzalloc(sizeof(struct intel_connector
), GFP_KERNEL
);
431 if (!intel_connector
) {
436 intel_encoder
= &intel_dvo
->base
;
437 drm_encoder_init(dev
, &intel_encoder
->base
,
438 &intel_dvo_enc_funcs
, encoder_type
);
440 intel_encoder
->disable
= intel_disable_dvo
;
441 intel_encoder
->enable
= intel_enable_dvo
;
442 intel_encoder
->get_hw_state
= intel_dvo_get_hw_state
;
443 intel_connector
->get_hw_state
= intel_dvo_connector_get_hw_state
;
445 /* Now, try to find a controller */
446 for (i
= 0; i
< ARRAY_SIZE(intel_dvo_devices
); i
++) {
447 struct drm_connector
*connector
= &intel_connector
->base
;
448 const struct intel_dvo_device
*dvo
= &intel_dvo_devices
[i
];
449 struct i2c_adapter
*i2c
;
453 /* Allow the I2C driver info to specify the GPIO to be used in
454 * special cases, but otherwise default to what's defined
457 if (intel_gmbus_is_port_valid(dvo
->gpio
))
459 else if (dvo
->type
== INTEL_DVO_CHIP_LVDS
)
460 gpio
= GMBUS_PORT_SSC
;
462 gpio
= GMBUS_PORT_DPB
;
464 /* Set up the I2C bus necessary for the chip we're probing.
465 * It appears that everything is on GPIOE except for panels
466 * on i830 laptops, which are on GPIOB (DVOA).
468 i2c
= intel_gmbus_get_adapter(dev_priv
, gpio
);
470 intel_dvo
->dev
= *dvo
;
472 /* GMBUS NAK handling seems to be unstable, hence let the
473 * transmitter detection run in bit banging mode for now.
475 intel_gmbus_force_bit(i2c
, true);
477 dvoinit
= dvo
->dev_ops
->init(&intel_dvo
->dev
, i2c
);
479 intel_gmbus_force_bit(i2c
, false);
484 intel_encoder
->type
= INTEL_OUTPUT_DVO
;
485 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1);
487 case INTEL_DVO_CHIP_TMDS
:
488 intel_encoder
->cloneable
= true;
489 drm_connector_init(dev
, connector
,
490 &intel_dvo_connector_funcs
,
491 DRM_MODE_CONNECTOR_DVII
);
492 encoder_type
= DRM_MODE_ENCODER_TMDS
;
494 case INTEL_DVO_CHIP_LVDS
:
495 intel_encoder
->cloneable
= false;
496 drm_connector_init(dev
, connector
,
497 &intel_dvo_connector_funcs
,
498 DRM_MODE_CONNECTOR_LVDS
);
499 encoder_type
= DRM_MODE_ENCODER_LVDS
;
503 drm_connector_helper_add(connector
,
504 &intel_dvo_connector_helper_funcs
);
505 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
506 connector
->interlace_allowed
= false;
507 connector
->doublescan_allowed
= false;
509 drm_encoder_helper_add(&intel_encoder
->base
,
510 &intel_dvo_helper_funcs
);
512 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
513 if (dvo
->type
== INTEL_DVO_CHIP_LVDS
) {
514 /* For our LVDS chipsets, we should hopefully be able
515 * to dig the fixed panel mode out of the BIOS data.
516 * However, it's in a different format from the BIOS
517 * data on chipsets with integrated LVDS (stored in AIM
518 * headers, likely), so for now, just get the current
519 * mode being output through DVO.
521 intel_dvo
->panel_fixed_mode
=
522 intel_dvo_get_current_mode(connector
);
523 intel_dvo
->panel_wants_dither
= true;
526 drm_sysfs_connector_add(connector
);
530 drm_encoder_cleanup(&intel_encoder
->base
);
532 kfree(intel_connector
);