1 /*
2 * Copyright 2006 Dave Airlie <airlied@linux.ie>
3 * Copyright © 2006-2007 Intel Corporation
4 *
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:
11 *
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
14 * Software.
15 *
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.
23 *
24 * Authors:
25 * Eric Anholt <eric@anholt.net>
26 */
27
28 #include <linux/i2c.h>
29 #include <linux/slab.h>
30
31 #include <drm/drm_atomic_helper.h>
32 #include <drm/drm_crtc.h>
33
34 #include "i915_drv.h"
35 #include "intel_connector.h"
36 #include "intel_de.h"
37 #include "intel_display_types.h"
38 #include "intel_dvo.h"
39 #include "intel_dvo_dev.h"
40 #include "intel_gmbus.h"
41 #include "intel_panel.h"
42
43 #define INTEL_DVO_CHIP_NONE 0
44 #define INTEL_DVO_CHIP_LVDS 1
45 #define INTEL_DVO_CHIP_TMDS 2
46 #define INTEL_DVO_CHIP_TVOUT 4
47 #define INTEL_DVO_CHIP_LVDS_NO_FIXED 5
48
49 #define SIL164_ADDR 0x38
50 #define CH7xxx_ADDR 0x76
51 #define TFP410_ADDR 0x38
52 #define NS2501_ADDR 0x38
53
54 static const struct intel_dvo_device intel_dvo_devices[] = {
55 {
56 .type = INTEL_DVO_CHIP_TMDS,
57 .name = "sil164",
58 .dvo_reg = DVOC,
59 .dvo_srcdim_reg = DVOC_SRCDIM,
60 .slave_addr = SIL164_ADDR,
61 .dev_ops = &sil164_ops,
62 },
63 {
64 .type = INTEL_DVO_CHIP_TMDS,
65 .name = "ch7xxx",
66 .dvo_reg = DVOC,
67 .dvo_srcdim_reg = DVOC_SRCDIM,
68 .slave_addr = CH7xxx_ADDR,
69 .dev_ops = &ch7xxx_ops,
70 },
71 {
72 .type = INTEL_DVO_CHIP_TMDS,
73 .name = "ch7xxx",
74 .dvo_reg = DVOC,
75 .dvo_srcdim_reg = DVOC_SRCDIM,
76 .slave_addr = 0x75, /* For some ch7010 */
77 .dev_ops = &ch7xxx_ops,
78 },
79 {
80 .type = INTEL_DVO_CHIP_LVDS,
81 .name = "ivch",
82 .dvo_reg = DVOA,
83 .dvo_srcdim_reg = DVOA_SRCDIM,
84 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
85 .dev_ops = &ivch_ops,
86 },
87 {
88 .type = INTEL_DVO_CHIP_TMDS,
89 .name = "tfp410",
90 .dvo_reg = DVOC,
91 .dvo_srcdim_reg = DVOC_SRCDIM,
92 .slave_addr = TFP410_ADDR,
93 .dev_ops = &tfp410_ops,
94 },
95 {
96 .type = INTEL_DVO_CHIP_LVDS,
97 .name = "ch7017",
98 .dvo_reg = DVOC,
99 .dvo_srcdim_reg = DVOC_SRCDIM,
100 .slave_addr = 0x75,
101 .gpio = GMBUS_PIN_DPB,
102 .dev_ops = &ch7017_ops,
103 },
104 {
105 .type = INTEL_DVO_CHIP_LVDS_NO_FIXED,
106 .name = "ns2501",
107 .dvo_reg = DVOB,
108 .dvo_srcdim_reg = DVOB_SRCDIM,
109 .slave_addr = NS2501_ADDR,
110 .dev_ops = &ns2501_ops,
111 },
112 };
113
114 struct intel_dvo {
115 struct intel_encoder base;
116
117 struct intel_dvo_device dev;
118
119 struct intel_connector *attached_connector;
120
121 bool panel_wants_dither;
122 };
123
enc_to_dvo(struct intel_encoder * encoder)124 static struct intel_dvo *enc_to_dvo(struct intel_encoder *encoder)
125 {
126 return container_of(encoder, struct intel_dvo, base);
127 }
128
intel_attached_dvo(struct intel_connector * connector)129 static struct intel_dvo *intel_attached_dvo(struct intel_connector *connector)
130 {
131 return enc_to_dvo(intel_attached_encoder(connector));
132 }
133
intel_dvo_connector_get_hw_state(struct intel_connector * connector)134 static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
135 {
136 struct drm_device *dev = connector->base.dev;
137 struct drm_i915_private *dev_priv = to_i915(dev);
138 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
139 u32 tmp;
140
141 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
142
143 if (!(tmp & DVO_ENABLE))
144 return false;
145
146 return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
147 }
148
intel_dvo_get_hw_state(struct intel_encoder * encoder,enum pipe * pipe)149 static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
150 enum pipe *pipe)
151 {
152 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
153 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
154 u32 tmp;
155
156 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
157
158 *pipe = (tmp & DVO_PIPE_SEL_MASK) >> DVO_PIPE_SEL_SHIFT;
159
160 return tmp & DVO_ENABLE;
161 }
162
intel_dvo_get_config(struct intel_encoder * encoder,struct intel_crtc_state * pipe_config)163 static void intel_dvo_get_config(struct intel_encoder *encoder,
164 struct intel_crtc_state *pipe_config)
165 {
166 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
167 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
168 u32 tmp, flags = 0;
169
170 pipe_config->output_types |= BIT(INTEL_OUTPUT_DVO);
171
172 tmp = intel_de_read(dev_priv, intel_dvo->dev.dvo_reg);
173 if (tmp & DVO_HSYNC_ACTIVE_HIGH)
174 flags |= DRM_MODE_FLAG_PHSYNC;
175 else
176 flags |= DRM_MODE_FLAG_NHSYNC;
177 if (tmp & DVO_VSYNC_ACTIVE_HIGH)
178 flags |= DRM_MODE_FLAG_PVSYNC;
179 else
180 flags |= DRM_MODE_FLAG_NVSYNC;
181
182 pipe_config->hw.adjusted_mode.flags |= flags;
183
184 pipe_config->hw.adjusted_mode.crtc_clock = pipe_config->port_clock;
185 }
186
intel_disable_dvo(struct intel_atomic_state * state,struct intel_encoder * encoder,const struct intel_crtc_state * old_crtc_state,const struct drm_connector_state * old_conn_state)187 static void intel_disable_dvo(struct intel_atomic_state *state,
188 struct intel_encoder *encoder,
189 const struct intel_crtc_state *old_crtc_state,
190 const struct drm_connector_state *old_conn_state)
191 {
192 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
193 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
194 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
195 u32 temp = intel_de_read(dev_priv, dvo_reg);
196
197 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
198 intel_de_write(dev_priv, dvo_reg, temp & ~DVO_ENABLE);
199 intel_de_read(dev_priv, dvo_reg);
200 }
201
intel_enable_dvo(struct intel_atomic_state * state,struct intel_encoder * encoder,const struct intel_crtc_state * pipe_config,const struct drm_connector_state * conn_state)202 static void intel_enable_dvo(struct intel_atomic_state *state,
203 struct intel_encoder *encoder,
204 const struct intel_crtc_state *pipe_config,
205 const struct drm_connector_state *conn_state)
206 {
207 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
208 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
209 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
210 u32 temp = intel_de_read(dev_priv, dvo_reg);
211
212 intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev,
213 &pipe_config->hw.mode,
214 &pipe_config->hw.adjusted_mode);
215
216 intel_de_write(dev_priv, dvo_reg, temp | DVO_ENABLE);
217 intel_de_read(dev_priv, dvo_reg);
218
219 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
220 }
221
222 static enum drm_mode_status
intel_dvo_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)223 intel_dvo_mode_valid(struct drm_connector *connector,
224 struct drm_display_mode *mode)
225 {
226 struct intel_connector *intel_connector = to_intel_connector(connector);
227 struct intel_dvo *intel_dvo = intel_attached_dvo(intel_connector);
228 const struct drm_display_mode *fixed_mode =
229 intel_panel_fixed_mode(intel_connector, mode);
230 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
231 int target_clock = mode->clock;
232
233 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
234 return MODE_NO_DBLESCAN;
235
236 /* XXX: Validate clock range */
237
238 if (fixed_mode) {
239 enum drm_mode_status status;
240
241 status = intel_panel_mode_valid(intel_connector, mode);
242 if (status != MODE_OK)
243 return status;
244
245 target_clock = fixed_mode->clock;
246 }
247
248 if (target_clock > max_dotclk)
249 return MODE_CLOCK_HIGH;
250
251 return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
252 }
253
intel_dvo_compute_config(struct intel_encoder * encoder,struct intel_crtc_state * pipe_config,struct drm_connector_state * conn_state)254 static int intel_dvo_compute_config(struct intel_encoder *encoder,
255 struct intel_crtc_state *pipe_config,
256 struct drm_connector_state *conn_state)
257 {
258 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
259 struct intel_connector *connector = to_intel_connector(conn_state->connector);
260 struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
261 const struct drm_display_mode *fixed_mode =
262 intel_panel_fixed_mode(intel_dvo->attached_connector, adjusted_mode);
263
264 /*
265 * If we have timings from the BIOS for the panel, put them in
266 * to the adjusted mode. The CRTC will be set up for this mode,
267 * with the panel scaling set up to source from the H/VDisplay
268 * of the original mode.
269 */
270 if (fixed_mode) {
271 int ret;
272
273 ret = intel_panel_compute_config(connector, adjusted_mode);
274 if (ret)
275 return ret;
276 }
277
278 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
279 return -EINVAL;
280
281 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
282
283 return 0;
284 }
285
intel_dvo_pre_enable(struct intel_atomic_state * state,struct intel_encoder * encoder,const struct intel_crtc_state * pipe_config,const struct drm_connector_state * conn_state)286 static void intel_dvo_pre_enable(struct intel_atomic_state *state,
287 struct intel_encoder *encoder,
288 const struct intel_crtc_state *pipe_config,
289 const struct drm_connector_state *conn_state)
290 {
291 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
292 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
293 const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
294 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
295 enum pipe pipe = crtc->pipe;
296 u32 dvo_val;
297 i915_reg_t dvo_reg = intel_dvo->dev.dvo_reg;
298 i915_reg_t dvo_srcdim_reg = intel_dvo->dev.dvo_srcdim_reg;
299
300 /* Save the data order, since I don't know what it should be set to. */
301 dvo_val = intel_de_read(dev_priv, dvo_reg) &
302 (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
303 dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
304 DVO_BLANK_ACTIVE_HIGH;
305
306 dvo_val |= DVO_PIPE_SEL(pipe);
307 dvo_val |= DVO_PIPE_STALL;
308 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
309 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
310 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
311 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
312
313 intel_de_write(dev_priv, dvo_srcdim_reg,
314 (adjusted_mode->crtc_hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) | (adjusted_mode->crtc_vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
315 intel_de_write(dev_priv, dvo_reg, dvo_val);
316 }
317
318 static enum drm_connector_status
intel_dvo_detect(struct drm_connector * connector,bool force)319 intel_dvo_detect(struct drm_connector *connector, bool force)
320 {
321 struct drm_i915_private *i915 = to_i915(connector->dev);
322 struct intel_dvo *intel_dvo = intel_attached_dvo(to_intel_connector(connector));
323
324 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
325 connector->base.id, connector->name);
326
327 if (!INTEL_DISPLAY_ENABLED(i915))
328 return connector_status_disconnected;
329
330 return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
331 }
332
intel_dvo_get_modes(struct drm_connector * connector)333 static int intel_dvo_get_modes(struct drm_connector *connector)
334 {
335 struct drm_i915_private *dev_priv = to_i915(connector->dev);
336 int num_modes;
337
338 /*
339 * We should probably have an i2c driver get_modes function for those
340 * devices which will have a fixed set of modes determined by the chip
341 * (TV-out, for example), but for now with just TMDS and LVDS,
342 * that's not the case.
343 */
344 num_modes = intel_ddc_get_modes(connector,
345 intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPC));
346 if (num_modes)
347 return num_modes;
348
349 return intel_panel_get_modes(to_intel_connector(connector));
350 }
351
352 static const struct drm_connector_funcs intel_dvo_connector_funcs = {
353 .detect = intel_dvo_detect,
354 .late_register = intel_connector_register,
355 .early_unregister = intel_connector_unregister,
356 .destroy = intel_connector_destroy,
357 .fill_modes = drm_helper_probe_single_connector_modes,
358 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
359 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
360 };
361
362 static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
363 .mode_valid = intel_dvo_mode_valid,
364 .get_modes = intel_dvo_get_modes,
365 };
366
intel_dvo_enc_destroy(struct drm_encoder * encoder)367 static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
368 {
369 struct intel_dvo *intel_dvo = enc_to_dvo(to_intel_encoder(encoder));
370
371 if (intel_dvo->dev.dev_ops->destroy)
372 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
373
374 intel_encoder_destroy(encoder);
375 }
376
377 static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
378 .destroy = intel_dvo_enc_destroy,
379 };
380
intel_dvo_port(i915_reg_t dvo_reg)381 static enum port intel_dvo_port(i915_reg_t dvo_reg)
382 {
383 if (i915_mmio_reg_equal(dvo_reg, DVOA))
384 return PORT_A;
385 else if (i915_mmio_reg_equal(dvo_reg, DVOB))
386 return PORT_B;
387 else
388 return PORT_C;
389 }
390
intel_dvo_init(struct drm_i915_private * dev_priv)391 void intel_dvo_init(struct drm_i915_private *dev_priv)
392 {
393 struct intel_encoder *intel_encoder;
394 struct intel_dvo *intel_dvo;
395 struct intel_connector *intel_connector;
396 int i;
397 int encoder_type = DRM_MODE_ENCODER_NONE;
398
399 intel_dvo = kzalloc(sizeof(*intel_dvo), GFP_KERNEL);
400 if (!intel_dvo)
401 return;
402
403 intel_connector = intel_connector_alloc();
404 if (!intel_connector) {
405 kfree(intel_dvo);
406 return;
407 }
408
409 intel_dvo->attached_connector = intel_connector;
410
411 intel_encoder = &intel_dvo->base;
412
413 intel_encoder->disable = intel_disable_dvo;
414 intel_encoder->enable = intel_enable_dvo;
415 intel_encoder->get_hw_state = intel_dvo_get_hw_state;
416 intel_encoder->get_config = intel_dvo_get_config;
417 intel_encoder->compute_config = intel_dvo_compute_config;
418 intel_encoder->pre_enable = intel_dvo_pre_enable;
419 intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
420
421 /* Now, try to find a controller */
422 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
423 struct drm_connector *connector = &intel_connector->base;
424 const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
425 struct i2c_adapter *i2c;
426 int gpio;
427 bool dvoinit;
428 enum pipe pipe;
429 u32 dpll[I915_MAX_PIPES];
430 enum port port;
431
432 /*
433 * Allow the I2C driver info to specify the GPIO to be used in
434 * special cases, but otherwise default to what's defined
435 * in the spec.
436 */
437 if (intel_gmbus_is_valid_pin(dev_priv, dvo->gpio))
438 gpio = dvo->gpio;
439 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
440 gpio = GMBUS_PIN_SSC;
441 else
442 gpio = GMBUS_PIN_DPB;
443
444 /*
445 * Set up the I2C bus necessary for the chip we're probing.
446 * It appears that everything is on GPIOE except for panels
447 * on i830 laptops, which are on GPIOB (DVOA).
448 */
449 i2c = intel_gmbus_get_adapter(dev_priv, gpio);
450
451 intel_dvo->dev = *dvo;
452
453 /*
454 * GMBUS NAK handling seems to be unstable, hence let the
455 * transmitter detection run in bit banging mode for now.
456 */
457 intel_gmbus_force_bit(i2c, true);
458
459 /*
460 * ns2501 requires the DVO 2x clock before it will
461 * respond to i2c accesses, so make sure we have
462 * have the clock enabled before we attempt to
463 * initialize the device.
464 */
465 for_each_pipe(dev_priv, pipe) {
466 dpll[pipe] = intel_de_read(dev_priv, DPLL(pipe));
467 intel_de_write(dev_priv, DPLL(pipe),
468 dpll[pipe] | DPLL_DVO_2X_MODE);
469 }
470
471 dvoinit = dvo->dev_ops->init(&intel_dvo->dev, i2c);
472
473 /* restore the DVO 2x clock state to original */
474 for_each_pipe(dev_priv, pipe) {
475 intel_de_write(dev_priv, DPLL(pipe), dpll[pipe]);
476 }
477
478 intel_gmbus_force_bit(i2c, false);
479
480 if (!dvoinit)
481 continue;
482
483 port = intel_dvo_port(dvo->dvo_reg);
484 drm_encoder_init(&dev_priv->drm, &intel_encoder->base,
485 &intel_dvo_enc_funcs, encoder_type,
486 "DVO %c", port_name(port));
487
488 intel_encoder->type = INTEL_OUTPUT_DVO;
489 intel_encoder->power_domain = POWER_DOMAIN_PORT_OTHER;
490 intel_encoder->port = port;
491 intel_encoder->pipe_mask = ~0;
492
493 if (dvo->type != INTEL_DVO_CHIP_LVDS)
494 intel_encoder->cloneable = (1 << INTEL_OUTPUT_ANALOG) |
495 (1 << INTEL_OUTPUT_DVO);
496
497 switch (dvo->type) {
498 case INTEL_DVO_CHIP_TMDS:
499 intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT |
500 DRM_CONNECTOR_POLL_DISCONNECT;
501 drm_connector_init(&dev_priv->drm, connector,
502 &intel_dvo_connector_funcs,
503 DRM_MODE_CONNECTOR_DVII);
504 encoder_type = DRM_MODE_ENCODER_TMDS;
505 break;
506 case INTEL_DVO_CHIP_LVDS_NO_FIXED:
507 case INTEL_DVO_CHIP_LVDS:
508 drm_connector_init(&dev_priv->drm, connector,
509 &intel_dvo_connector_funcs,
510 DRM_MODE_CONNECTOR_LVDS);
511 encoder_type = DRM_MODE_ENCODER_LVDS;
512 break;
513 }
514
515 drm_connector_helper_add(connector,
516 &intel_dvo_connector_helper_funcs);
517 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
518 connector->interlace_allowed = false;
519 connector->doublescan_allowed = false;
520
521 intel_connector_attach_encoder(intel_connector, intel_encoder);
522 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
523 /*
524 * For our LVDS chipsets, we should hopefully be able
525 * to dig the fixed panel mode out of the BIOS data.
526 * However, it's in a different format from the BIOS
527 * data on chipsets with integrated LVDS (stored in AIM
528 * headers, likely), so for now, just get the current
529 * mode being output through DVO.
530 */
531 intel_panel_add_encoder_fixed_mode(intel_connector,
532 intel_encoder);
533
534 intel_panel_init(intel_connector);
535
536 intel_dvo->panel_wants_dither = true;
537 }
538
539 return;
540 }
541
542 kfree(intel_dvo);
543 kfree(intel_connector);
544 }
545