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_atomic_helper.h>
31 #include <drm/drm_crtc.h>
32 #include "intel_drv.h"
33 #include <drm/i915_drm.h>
37 #define SIL164_ADDR 0x38
38 #define CH7xxx_ADDR 0x76
39 #define TFP410_ADDR 0x38
40 #define NS2501_ADDR 0x38
42 static const struct intel_dvo_device intel_dvo_devices
[] = {
44 .type
= INTEL_DVO_CHIP_TMDS
,
47 .slave_addr
= SIL164_ADDR
,
48 .dev_ops
= &sil164_ops
,
51 .type
= INTEL_DVO_CHIP_TMDS
,
54 .slave_addr
= CH7xxx_ADDR
,
55 .dev_ops
= &ch7xxx_ops
,
58 .type
= INTEL_DVO_CHIP_TMDS
,
61 .slave_addr
= 0x75, /* For some ch7010 */
62 .dev_ops
= &ch7xxx_ops
,
65 .type
= INTEL_DVO_CHIP_LVDS
,
68 .slave_addr
= 0x02, /* Might also be 0x44, 0x84, 0xc4 */
72 .type
= INTEL_DVO_CHIP_TMDS
,
75 .slave_addr
= TFP410_ADDR
,
76 .dev_ops
= &tfp410_ops
,
79 .type
= INTEL_DVO_CHIP_LVDS
,
83 .gpio
= GMBUS_PIN_DPB
,
84 .dev_ops
= &ch7017_ops
,
87 .type
= INTEL_DVO_CHIP_TMDS
,
90 .slave_addr
= NS2501_ADDR
,
91 .dev_ops
= &ns2501_ops
,
96 struct intel_encoder base
;
98 struct intel_dvo_device dev
;
100 struct drm_display_mode
*panel_fixed_mode
;
101 bool panel_wants_dither
;
104 static struct intel_dvo
*enc_to_dvo(struct intel_encoder
*encoder
)
106 return container_of(encoder
, struct intel_dvo
, base
);
109 static struct intel_dvo
*intel_attached_dvo(struct drm_connector
*connector
)
111 return enc_to_dvo(intel_attached_encoder(connector
));
114 static bool intel_dvo_connector_get_hw_state(struct intel_connector
*connector
)
116 struct drm_device
*dev
= connector
->base
.dev
;
117 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
118 struct intel_dvo
*intel_dvo
= intel_attached_dvo(&connector
->base
);
121 tmp
= I915_READ(intel_dvo
->dev
.dvo_reg
);
123 if (!(tmp
& DVO_ENABLE
))
126 return intel_dvo
->dev
.dev_ops
->get_hw_state(&intel_dvo
->dev
);
129 static bool intel_dvo_get_hw_state(struct intel_encoder
*encoder
,
132 struct drm_device
*dev
= encoder
->base
.dev
;
133 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
134 struct intel_dvo
*intel_dvo
= enc_to_dvo(encoder
);
137 tmp
= I915_READ(intel_dvo
->dev
.dvo_reg
);
139 if (!(tmp
& DVO_ENABLE
))
142 *pipe
= PORT_TO_PIPE(tmp
);
147 static void intel_dvo_get_config(struct intel_encoder
*encoder
,
148 struct intel_crtc_state
*pipe_config
)
150 struct drm_i915_private
*dev_priv
= encoder
->base
.dev
->dev_private
;
151 struct intel_dvo
*intel_dvo
= enc_to_dvo(encoder
);
154 tmp
= I915_READ(intel_dvo
->dev
.dvo_reg
);
155 if (tmp
& DVO_HSYNC_ACTIVE_HIGH
)
156 flags
|= DRM_MODE_FLAG_PHSYNC
;
158 flags
|= DRM_MODE_FLAG_NHSYNC
;
159 if (tmp
& DVO_VSYNC_ACTIVE_HIGH
)
160 flags
|= DRM_MODE_FLAG_PVSYNC
;
162 flags
|= DRM_MODE_FLAG_NVSYNC
;
164 pipe_config
->base
.adjusted_mode
.flags
|= flags
;
166 pipe_config
->base
.adjusted_mode
.crtc_clock
= pipe_config
->port_clock
;
169 static void intel_disable_dvo(struct intel_encoder
*encoder
)
171 struct drm_i915_private
*dev_priv
= encoder
->base
.dev
->dev_private
;
172 struct intel_dvo
*intel_dvo
= enc_to_dvo(encoder
);
173 u32 dvo_reg
= intel_dvo
->dev
.dvo_reg
;
174 u32 temp
= I915_READ(dvo_reg
);
176 intel_dvo
->dev
.dev_ops
->dpms(&intel_dvo
->dev
, false);
177 I915_WRITE(dvo_reg
, temp
& ~DVO_ENABLE
);
181 static void intel_enable_dvo(struct intel_encoder
*encoder
)
183 struct drm_i915_private
*dev_priv
= encoder
->base
.dev
->dev_private
;
184 struct intel_dvo
*intel_dvo
= enc_to_dvo(encoder
);
185 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
186 u32 dvo_reg
= intel_dvo
->dev
.dvo_reg
;
187 u32 temp
= I915_READ(dvo_reg
);
189 intel_dvo
->dev
.dev_ops
->mode_set(&intel_dvo
->dev
,
190 &crtc
->config
->base
.mode
,
191 &crtc
->config
->base
.adjusted_mode
);
193 I915_WRITE(dvo_reg
, temp
| DVO_ENABLE
);
196 intel_dvo
->dev
.dev_ops
->dpms(&intel_dvo
->dev
, true);
199 static enum drm_mode_status
200 intel_dvo_mode_valid(struct drm_connector
*connector
,
201 struct drm_display_mode
*mode
)
203 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
205 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
206 return MODE_NO_DBLESCAN
;
208 /* XXX: Validate clock range */
210 if (intel_dvo
->panel_fixed_mode
) {
211 if (mode
->hdisplay
> intel_dvo
->panel_fixed_mode
->hdisplay
)
213 if (mode
->vdisplay
> intel_dvo
->panel_fixed_mode
->vdisplay
)
217 return intel_dvo
->dev
.dev_ops
->mode_valid(&intel_dvo
->dev
, mode
);
220 static bool intel_dvo_compute_config(struct intel_encoder
*encoder
,
221 struct intel_crtc_state
*pipe_config
)
223 struct intel_dvo
*intel_dvo
= enc_to_dvo(encoder
);
224 struct drm_display_mode
*adjusted_mode
= &pipe_config
->base
.adjusted_mode
;
226 /* If we have timings from the BIOS for the panel, put them in
227 * to the adjusted mode. The CRTC will be set up for this mode,
228 * with the panel scaling set up to source from the H/VDisplay
229 * of the original mode.
231 if (intel_dvo
->panel_fixed_mode
!= NULL
) {
232 #define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
244 drm_mode_set_crtcinfo(adjusted_mode
, 0);
250 static void intel_dvo_pre_enable(struct intel_encoder
*encoder
)
252 struct drm_device
*dev
= encoder
->base
.dev
;
253 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
254 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
255 struct drm_display_mode
*adjusted_mode
= &crtc
->config
->base
.adjusted_mode
;
256 struct intel_dvo
*intel_dvo
= enc_to_dvo(encoder
);
257 int pipe
= crtc
->pipe
;
259 u32 dvo_reg
= intel_dvo
->dev
.dvo_reg
, dvo_srcdim_reg
;
264 dvo_srcdim_reg
= DVOA_SRCDIM
;
267 dvo_srcdim_reg
= DVOB_SRCDIM
;
270 dvo_srcdim_reg
= DVOC_SRCDIM
;
274 /* Save the data order, since I don't know what it should be set to. */
275 dvo_val
= I915_READ(dvo_reg
) &
276 (DVO_PRESERVE_MASK
| DVO_DATA_ORDER_GBRG
);
277 dvo_val
|= DVO_DATA_ORDER_FP
| DVO_BORDER_ENABLE
|
278 DVO_BLANK_ACTIVE_HIGH
;
281 dvo_val
|= DVO_PIPE_B_SELECT
;
282 dvo_val
|= DVO_PIPE_STALL
;
283 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PHSYNC
)
284 dvo_val
|= DVO_HSYNC_ACTIVE_HIGH
;
285 if (adjusted_mode
->flags
& DRM_MODE_FLAG_PVSYNC
)
286 dvo_val
|= DVO_VSYNC_ACTIVE_HIGH
;
288 /*I915_WRITE(DVOB_SRCDIM,
289 (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
290 (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
291 I915_WRITE(dvo_srcdim_reg
,
292 (adjusted_mode
->hdisplay
<< DVO_SRCDIM_HORIZONTAL_SHIFT
) |
293 (adjusted_mode
->vdisplay
<< DVO_SRCDIM_VERTICAL_SHIFT
));
294 /*I915_WRITE(DVOB, dvo_val);*/
295 I915_WRITE(dvo_reg
, dvo_val
);
299 * Detect the output connection on our DVO device.
303 static enum drm_connector_status
304 intel_dvo_detect(struct drm_connector
*connector
, bool force
)
306 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
307 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
308 connector
->base
.id
, connector
->name
);
309 return intel_dvo
->dev
.dev_ops
->detect(&intel_dvo
->dev
);
312 static int intel_dvo_get_modes(struct drm_connector
*connector
)
314 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
315 struct drm_i915_private
*dev_priv
= connector
->dev
->dev_private
;
317 /* We should probably have an i2c driver get_modes function for those
318 * devices which will have a fixed set of modes determined by the chip
319 * (TV-out, for example), but for now with just TMDS and LVDS,
320 * that's not the case.
322 intel_ddc_get_modes(connector
,
323 intel_gmbus_get_adapter(dev_priv
, GMBUS_PIN_DPC
));
324 if (!list_empty(&connector
->probed_modes
))
327 if (intel_dvo
->panel_fixed_mode
!= NULL
) {
328 struct drm_display_mode
*mode
;
329 mode
= drm_mode_duplicate(connector
->dev
, intel_dvo
->panel_fixed_mode
);
331 drm_mode_probed_add(connector
, mode
);
339 static void intel_dvo_destroy(struct drm_connector
*connector
)
341 drm_connector_cleanup(connector
);
345 static const struct drm_connector_funcs intel_dvo_connector_funcs
= {
346 .dpms
= drm_atomic_helper_connector_dpms
,
347 .detect
= intel_dvo_detect
,
348 .destroy
= intel_dvo_destroy
,
349 .fill_modes
= drm_helper_probe_single_connector_modes
,
350 .atomic_get_property
= intel_connector_atomic_get_property
,
351 .atomic_destroy_state
= drm_atomic_helper_connector_destroy_state
,
352 .atomic_duplicate_state
= drm_atomic_helper_connector_duplicate_state
,
355 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs
= {
356 .mode_valid
= intel_dvo_mode_valid
,
357 .get_modes
= intel_dvo_get_modes
,
358 .best_encoder
= intel_best_encoder
,
361 static void intel_dvo_enc_destroy(struct drm_encoder
*encoder
)
363 struct intel_dvo
*intel_dvo
= enc_to_dvo(to_intel_encoder(encoder
));
365 if (intel_dvo
->dev
.dev_ops
->destroy
)
366 intel_dvo
->dev
.dev_ops
->destroy(&intel_dvo
->dev
);
368 kfree(intel_dvo
->panel_fixed_mode
);
370 intel_encoder_destroy(encoder
);
373 static const struct drm_encoder_funcs intel_dvo_enc_funcs
= {
374 .destroy
= intel_dvo_enc_destroy
,
378 * Attempts to get a fixed panel timing for LVDS (currently only the i830).
380 * Other chips with DVO LVDS will need to extend this to deal with the LVDS
381 * chip being on DVOB/C and having multiple pipes.
383 static struct drm_display_mode
*
384 intel_dvo_get_current_mode(struct drm_connector
*connector
)
386 struct drm_device
*dev
= connector
->dev
;
387 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
388 struct intel_dvo
*intel_dvo
= intel_attached_dvo(connector
);
389 uint32_t dvo_val
= I915_READ(intel_dvo
->dev
.dvo_reg
);
390 struct drm_display_mode
*mode
= NULL
;
392 /* If the DVO port is active, that'll be the LVDS, so we can pull out
393 * its timings to get how the BIOS set up the panel.
395 if (dvo_val
& DVO_ENABLE
) {
396 struct drm_crtc
*crtc
;
397 int pipe
= (dvo_val
& DVO_PIPE_B_SELECT
) ? 1 : 0;
399 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
401 mode
= intel_crtc_mode_get(dev
, crtc
);
403 mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
404 if (dvo_val
& DVO_HSYNC_ACTIVE_HIGH
)
405 mode
->flags
|= DRM_MODE_FLAG_PHSYNC
;
406 if (dvo_val
& DVO_VSYNC_ACTIVE_HIGH
)
407 mode
->flags
|= DRM_MODE_FLAG_PVSYNC
;
415 void intel_dvo_init(struct drm_device
*dev
)
417 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
418 struct intel_encoder
*intel_encoder
;
419 struct intel_dvo
*intel_dvo
;
420 struct intel_connector
*intel_connector
;
422 int encoder_type
= DRM_MODE_ENCODER_NONE
;
424 intel_dvo
= kzalloc(sizeof(*intel_dvo
), GFP_KERNEL
);
428 intel_connector
= intel_connector_alloc();
429 if (!intel_connector
) {
434 intel_encoder
= &intel_dvo
->base
;
435 drm_encoder_init(dev
, &intel_encoder
->base
,
436 &intel_dvo_enc_funcs
, encoder_type
);
438 intel_encoder
->disable
= intel_disable_dvo
;
439 intel_encoder
->enable
= intel_enable_dvo
;
440 intel_encoder
->get_hw_state
= intel_dvo_get_hw_state
;
441 intel_encoder
->get_config
= intel_dvo_get_config
;
442 intel_encoder
->compute_config
= intel_dvo_compute_config
;
443 intel_encoder
->pre_enable
= intel_dvo_pre_enable
;
444 intel_connector
->get_hw_state
= intel_dvo_connector_get_hw_state
;
445 intel_connector
->unregister
= intel_connector_unregister
;
447 /* Now, try to find a controller */
448 for (i
= 0; i
< ARRAY_SIZE(intel_dvo_devices
); i
++) {
449 struct drm_connector
*connector
= &intel_connector
->base
;
450 const struct intel_dvo_device
*dvo
= &intel_dvo_devices
[i
];
451 struct i2c_adapter
*i2c
;
455 uint32_t dpll
[I915_MAX_PIPES
];
457 /* Allow the I2C driver info to specify the GPIO to be used in
458 * special cases, but otherwise default to what's defined
461 if (intel_gmbus_is_valid_pin(dev_priv
, dvo
->gpio
))
463 else if (dvo
->type
== INTEL_DVO_CHIP_LVDS
)
464 gpio
= GMBUS_PIN_SSC
;
466 gpio
= GMBUS_PIN_DPB
;
468 /* Set up the I2C bus necessary for the chip we're probing.
469 * It appears that everything is on GPIOE except for panels
470 * on i830 laptops, which are on GPIOB (DVOA).
472 i2c
= intel_gmbus_get_adapter(dev_priv
, gpio
);
474 intel_dvo
->dev
= *dvo
;
476 /* GMBUS NAK handling seems to be unstable, hence let the
477 * transmitter detection run in bit banging mode for now.
479 intel_gmbus_force_bit(i2c
, true);
481 /* ns2501 requires the DVO 2x clock before it will
482 * respond to i2c accesses, so make sure we have
483 * have the clock enabled before we attempt to
484 * initialize the device.
486 for_each_pipe(dev_priv
, pipe
) {
487 dpll
[pipe
] = I915_READ(DPLL(pipe
));
488 I915_WRITE(DPLL(pipe
), dpll
[pipe
] | DPLL_DVO_2X_MODE
);
491 dvoinit
= dvo
->dev_ops
->init(&intel_dvo
->dev
, i2c
);
493 /* restore the DVO 2x clock state to original */
494 for_each_pipe(dev_priv
, pipe
) {
495 I915_WRITE(DPLL(pipe
), dpll
[pipe
]);
498 intel_gmbus_force_bit(i2c
, false);
503 intel_encoder
->type
= INTEL_OUTPUT_DVO
;
504 intel_encoder
->crtc_mask
= (1 << 0) | (1 << 1);
506 case INTEL_DVO_CHIP_TMDS
:
507 intel_encoder
->cloneable
= (1 << INTEL_OUTPUT_ANALOG
) |
508 (1 << INTEL_OUTPUT_DVO
);
509 drm_connector_init(dev
, connector
,
510 &intel_dvo_connector_funcs
,
511 DRM_MODE_CONNECTOR_DVII
);
512 encoder_type
= DRM_MODE_ENCODER_TMDS
;
514 case INTEL_DVO_CHIP_LVDS
:
515 intel_encoder
->cloneable
= 0;
516 drm_connector_init(dev
, connector
,
517 &intel_dvo_connector_funcs
,
518 DRM_MODE_CONNECTOR_LVDS
);
519 encoder_type
= DRM_MODE_ENCODER_LVDS
;
523 drm_connector_helper_add(connector
,
524 &intel_dvo_connector_helper_funcs
);
525 connector
->display_info
.subpixel_order
= SubPixelHorizontalRGB
;
526 connector
->interlace_allowed
= false;
527 connector
->doublescan_allowed
= false;
529 intel_connector_attach_encoder(intel_connector
, intel_encoder
);
530 if (dvo
->type
== INTEL_DVO_CHIP_LVDS
) {
531 /* For our LVDS chipsets, we should hopefully be able
532 * to dig the fixed panel mode out of the BIOS data.
533 * However, it's in a different format from the BIOS
534 * data on chipsets with integrated LVDS (stored in AIM
535 * headers, likely), so for now, just get the current
536 * mode being output through DVO.
538 intel_dvo
->panel_fixed_mode
=
539 intel_dvo_get_current_mode(connector
);
540 intel_dvo
->panel_wants_dither
= true;
543 drm_connector_register(connector
);
547 drm_encoder_cleanup(&intel_encoder
->base
);
549 kfree(intel_connector
);