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#include <drm/drm_edid.h>
34
35#include "i915_drv.h"
36#include "i915_reg.h"
37#include "intel_connector.h"
38#include "intel_de.h"
39#include "intel_display_driver.h"
40#include "intel_display_types.h"
41#include "intel_dvo.h"
42#include "intel_dvo_dev.h"
43#include "intel_dvo_regs.h"
44#include "intel_gmbus.h"
45#include "intel_panel.h"
46
47#define INTEL_DVO_CHIP_NONE 0
48#define INTEL_DVO_CHIP_LVDS 1
49#define INTEL_DVO_CHIP_TMDS 2
50#define INTEL_DVO_CHIP_TVOUT 4
51#define INTEL_DVO_CHIP_LVDS_NO_FIXED 5
52
53#define SIL164_ADDR 0x38
54#define CH7xxx_ADDR 0x76
55#define TFP410_ADDR 0x38
56#define NS2501_ADDR 0x38
57
58static const struct intel_dvo_device intel_dvo_devices[] = {
59 {
60 .type = INTEL_DVO_CHIP_TMDS,
61 .name = "sil164",
62 .port = PORT_C,
63 .slave_addr = SIL164_ADDR,
64 .dev_ops = &sil164_ops,
65 },
66 {
67 .type = INTEL_DVO_CHIP_TMDS,
68 .name = "ch7xxx",
69 .port = PORT_C,
70 .slave_addr = CH7xxx_ADDR,
71 .dev_ops = &ch7xxx_ops,
72 },
73 {
74 .type = INTEL_DVO_CHIP_TMDS,
75 .name = "ch7xxx",
76 .port = PORT_C,
77 .slave_addr = 0x75, /* For some ch7010 */
78 .dev_ops = &ch7xxx_ops,
79 },
80 {
81 .type = INTEL_DVO_CHIP_LVDS,
82 .name = "ivch",
83 .port = PORT_A,
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 .port = PORT_C,
91 .slave_addr = TFP410_ADDR,
92 .dev_ops = &tfp410_ops,
93 },
94 {
95 .type = INTEL_DVO_CHIP_LVDS,
96 .name = "ch7017",
97 .port = PORT_C,
98 .slave_addr = 0x75,
99 .gpio = GMBUS_PIN_DPB,
100 .dev_ops = &ch7017_ops,
101 },
102 {
103 .type = INTEL_DVO_CHIP_LVDS_NO_FIXED,
104 .name = "ns2501",
105 .port = PORT_B,
106 .slave_addr = NS2501_ADDR,
107 .dev_ops = &ns2501_ops,
108 },
109};
110
111struct intel_dvo {
112 struct intel_encoder base;
113
114 struct intel_dvo_device dev;
115
116 struct intel_connector *attached_connector;
117};
118
119static struct intel_dvo *enc_to_dvo(struct intel_encoder *encoder)
120{
121 return container_of(encoder, struct intel_dvo, base);
122}
123
124static struct intel_dvo *intel_attached_dvo(struct intel_connector *connector)
125{
126 return enc_to_dvo(encoder: intel_attached_encoder(connector));
127}
128
129static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
130{
131 struct drm_i915_private *i915 = to_i915(dev: connector->base.dev);
132 struct intel_encoder *encoder = intel_attached_encoder(connector);
133 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
134 enum port port = encoder->port;
135 u32 tmp;
136
137 tmp = intel_de_read(i915, DVO(port));
138
139 if (!(tmp & DVO_ENABLE))
140 return false;
141
142 return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
143}
144
145static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
146 enum pipe *pipe)
147{
148 struct drm_i915_private *i915 = to_i915(dev: encoder->base.dev);
149 enum port port = encoder->port;
150 u32 tmp;
151
152 tmp = intel_de_read(i915, DVO(port));
153
154 *pipe = REG_FIELD_GET(DVO_PIPE_SEL_MASK, tmp);
155
156 return tmp & DVO_ENABLE;
157}
158
159static void intel_dvo_get_config(struct intel_encoder *encoder,
160 struct intel_crtc_state *pipe_config)
161{
162 struct drm_i915_private *i915 = to_i915(dev: encoder->base.dev);
163 enum port port = encoder->port;
164 u32 tmp, flags = 0;
165
166 pipe_config->output_types |= BIT(INTEL_OUTPUT_DVO);
167
168 tmp = intel_de_read(i915, DVO(port));
169 if (tmp & DVO_HSYNC_ACTIVE_HIGH)
170 flags |= DRM_MODE_FLAG_PHSYNC;
171 else
172 flags |= DRM_MODE_FLAG_NHSYNC;
173 if (tmp & DVO_VSYNC_ACTIVE_HIGH)
174 flags |= DRM_MODE_FLAG_PVSYNC;
175 else
176 flags |= DRM_MODE_FLAG_NVSYNC;
177
178 pipe_config->hw.adjusted_mode.flags |= flags;
179
180 pipe_config->hw.adjusted_mode.crtc_clock = pipe_config->port_clock;
181}
182
183static void intel_disable_dvo(struct intel_atomic_state *state,
184 struct intel_encoder *encoder,
185 const struct intel_crtc_state *old_crtc_state,
186 const struct drm_connector_state *old_conn_state)
187{
188 struct drm_i915_private *i915 = to_i915(dev: encoder->base.dev);
189 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
190 enum port port = encoder->port;
191
192 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
193
194 intel_de_rmw(i915, DVO(port), DVO_ENABLE, set: 0);
195 intel_de_posting_read(i915, DVO(port));
196}
197
198static void intel_enable_dvo(struct intel_atomic_state *state,
199 struct intel_encoder *encoder,
200 const struct intel_crtc_state *pipe_config,
201 const struct drm_connector_state *conn_state)
202{
203 struct drm_i915_private *i915 = to_i915(dev: encoder->base.dev);
204 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
205 enum port port = encoder->port;
206
207 intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev,
208 &pipe_config->hw.mode,
209 &pipe_config->hw.adjusted_mode);
210
211 intel_de_rmw(i915, DVO(port), clear: 0, DVO_ENABLE);
212 intel_de_posting_read(i915, DVO(port));
213
214 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
215}
216
217static enum drm_mode_status
218intel_dvo_mode_valid(struct drm_connector *_connector,
219 struct drm_display_mode *mode)
220{
221 struct intel_connector *connector = to_intel_connector(_connector);
222 struct drm_i915_private *i915 = to_i915(dev: connector->base.dev);
223 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
224 const struct drm_display_mode *fixed_mode =
225 intel_panel_fixed_mode(connector, mode);
226 int max_dotclk = to_i915(dev: connector->base.dev)->max_dotclk_freq;
227 int target_clock = mode->clock;
228 enum drm_mode_status status;
229
230 status = intel_cpu_transcoder_mode_valid(i915, mode);
231 if (status != MODE_OK)
232 return status;
233
234 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
235 return MODE_NO_DBLESCAN;
236
237 /* XXX: Validate clock range */
238
239 if (fixed_mode) {
240 enum drm_mode_status status;
241
242 status = intel_panel_mode_valid(connector, mode);
243 if (status != MODE_OK)
244 return status;
245
246 target_clock = fixed_mode->clock;
247 }
248
249 if (target_clock > max_dotclk)
250 return MODE_CLOCK_HIGH;
251
252 return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
253}
254
255static int intel_dvo_compute_config(struct intel_encoder *encoder,
256 struct intel_crtc_state *pipe_config,
257 struct drm_connector_state *conn_state)
258{
259 struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
260 struct intel_connector *connector = to_intel_connector(conn_state->connector);
261 struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
262 const struct drm_display_mode *fixed_mode =
263 intel_panel_fixed_mode(connector: intel_dvo->attached_connector, mode: adjusted_mode);
264
265 /*
266 * If we have timings from the BIOS for the panel, put them in
267 * to the adjusted mode. The CRTC will be set up for this mode,
268 * with the panel scaling set up to source from the H/VDisplay
269 * of the original mode.
270 */
271 if (fixed_mode) {
272 int ret;
273
274 ret = intel_panel_compute_config(connector, adjusted_mode);
275 if (ret)
276 return ret;
277 }
278
279 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
280 return -EINVAL;
281
282 pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
283 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
284
285 return 0;
286}
287
288static void intel_dvo_pre_enable(struct intel_atomic_state *state,
289 struct intel_encoder *encoder,
290 const struct intel_crtc_state *pipe_config,
291 const struct drm_connector_state *conn_state)
292{
293 struct drm_i915_private *i915 = to_i915(dev: encoder->base.dev);
294 struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
295 const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
296 enum port port = encoder->port;
297 enum pipe pipe = crtc->pipe;
298 u32 dvo_val;
299
300 /* Save the active data order, since I don't know what it should be set to. */
301 dvo_val = intel_de_read(i915, DVO(port)) &
302 (DVO_DEDICATED_INT_ENABLE |
303 DVO_PRESERVE_MASK | DVO_ACT_DATA_ORDER_MASK);
304 dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
305 DVO_BLANK_ACTIVE_HIGH;
306
307 dvo_val |= DVO_PIPE_SEL(pipe);
308 dvo_val |= DVO_PIPE_STALL;
309 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
310 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
311 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
312 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
313
314 intel_de_write(i915, DVO_SRCDIM(port),
315 DVO_SRCDIM_HORIZONTAL(adjusted_mode->crtc_hdisplay) |
316 DVO_SRCDIM_VERTICAL(adjusted_mode->crtc_vdisplay));
317 intel_de_write(i915, DVO(port), val: dvo_val);
318}
319
320static enum drm_connector_status
321intel_dvo_detect(struct drm_connector *_connector, bool force)
322{
323 struct intel_connector *connector = to_intel_connector(_connector);
324 struct drm_i915_private *i915 = to_i915(dev: connector->base.dev);
325 struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
326
327 drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s]\n",
328 connector->base.base.id, connector->base.name);
329
330 if (!intel_display_device_enabled(i915))
331 return connector_status_disconnected;
332
333 if (!intel_display_driver_check_access(i915))
334 return connector->base.status;
335
336 return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
337}
338
339static int intel_dvo_get_modes(struct drm_connector *_connector)
340{
341 struct intel_connector *connector = to_intel_connector(_connector);
342 struct drm_i915_private *i915 = to_i915(dev: connector->base.dev);
343 int num_modes;
344
345 if (!intel_display_driver_check_access(i915))
346 return drm_edid_connector_add_modes(connector: &connector->base);
347
348 /*
349 * We should probably have an i2c driver get_modes function for those
350 * devices which will have a fixed set of modes determined by the chip
351 * (TV-out, for example), but for now with just TMDS and LVDS,
352 * that's not the case.
353 */
354 num_modes = intel_ddc_get_modes(c: &connector->base, ddc: connector->base.ddc);
355 if (num_modes)
356 return num_modes;
357
358 return intel_panel_get_modes(connector);
359}
360
361static const struct drm_connector_funcs intel_dvo_connector_funcs = {
362 .detect = intel_dvo_detect,
363 .late_register = intel_connector_register,
364 .early_unregister = intel_connector_unregister,
365 .destroy = intel_connector_destroy,
366 .fill_modes = drm_helper_probe_single_connector_modes,
367 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
368 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
369};
370
371static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
372 .mode_valid = intel_dvo_mode_valid,
373 .get_modes = intel_dvo_get_modes,
374};
375
376static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
377{
378 struct intel_dvo *intel_dvo = enc_to_dvo(to_intel_encoder(encoder));
379
380 if (intel_dvo->dev.dev_ops->destroy)
381 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
382
383 intel_encoder_destroy(encoder);
384}
385
386static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
387 .destroy = intel_dvo_enc_destroy,
388};
389
390static int intel_dvo_encoder_type(const struct intel_dvo_device *dvo)
391{
392 switch (dvo->type) {
393 case INTEL_DVO_CHIP_TMDS:
394 return DRM_MODE_ENCODER_TMDS;
395 case INTEL_DVO_CHIP_LVDS_NO_FIXED:
396 case INTEL_DVO_CHIP_LVDS:
397 return DRM_MODE_ENCODER_LVDS;
398 default:
399 MISSING_CASE(dvo->type);
400 return DRM_MODE_ENCODER_NONE;
401 }
402}
403
404static int intel_dvo_connector_type(const struct intel_dvo_device *dvo)
405{
406 switch (dvo->type) {
407 case INTEL_DVO_CHIP_TMDS:
408 return DRM_MODE_CONNECTOR_DVII;
409 case INTEL_DVO_CHIP_LVDS_NO_FIXED:
410 case INTEL_DVO_CHIP_LVDS:
411 return DRM_MODE_CONNECTOR_LVDS;
412 default:
413 MISSING_CASE(dvo->type);
414 return DRM_MODE_CONNECTOR_Unknown;
415 }
416}
417
418static bool intel_dvo_init_dev(struct drm_i915_private *dev_priv,
419 struct intel_dvo *intel_dvo,
420 const struct intel_dvo_device *dvo)
421{
422 struct i2c_adapter *i2c;
423 u32 dpll[I915_MAX_PIPES];
424 enum pipe pipe;
425 int gpio;
426 bool ret;
427
428 /*
429 * Allow the I2C driver info to specify the GPIO to be used in
430 * special cases, but otherwise default to what's defined
431 * in the spec.
432 */
433 if (intel_gmbus_is_valid_pin(dev_priv, pin: dvo->gpio))
434 gpio = dvo->gpio;
435 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
436 gpio = GMBUS_PIN_SSC;
437 else
438 gpio = GMBUS_PIN_DPB;
439
440 /*
441 * Set up the I2C bus necessary for the chip we're probing.
442 * It appears that everything is on GPIOE except for panels
443 * on i830 laptops, which are on GPIOB (DVOA).
444 */
445 i2c = intel_gmbus_get_adapter(dev_priv, pin: gpio);
446
447 intel_dvo->dev = *dvo;
448
449 /*
450 * GMBUS NAK handling seems to be unstable, hence let the
451 * transmitter detection run in bit banging mode for now.
452 */
453 intel_gmbus_force_bit(adapter: i2c, force_bit: true);
454
455 /*
456 * ns2501 requires the DVO 2x clock before it will
457 * respond to i2c accesses, so make sure we have
458 * the clock enabled before we attempt to initialize
459 * the device.
460 */
461 for_each_pipe(dev_priv, pipe)
462 dpll[pipe] = intel_de_rmw(i915: dev_priv, DPLL(pipe), clear: 0, DPLL_DVO_2X_MODE);
463
464 ret = dvo->dev_ops->init(&intel_dvo->dev, i2c);
465
466 /* restore the DVO 2x clock state to original */
467 for_each_pipe(dev_priv, pipe) {
468 intel_de_write(i915: dev_priv, DPLL(pipe), val: dpll[pipe]);
469 }
470
471 intel_gmbus_force_bit(adapter: i2c, force_bit: false);
472
473 return ret;
474}
475
476static bool intel_dvo_probe(struct drm_i915_private *i915,
477 struct intel_dvo *intel_dvo)
478{
479 int i;
480
481 /* Now, try to find a controller */
482 for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
483 if (intel_dvo_init_dev(dev_priv: i915, intel_dvo,
484 dvo: &intel_dvo_devices[i]))
485 return true;
486 }
487
488 return false;
489}
490
491void intel_dvo_init(struct drm_i915_private *i915)
492{
493 struct intel_connector *connector;
494 struct intel_encoder *encoder;
495 struct intel_dvo *intel_dvo;
496
497 intel_dvo = kzalloc(size: sizeof(*intel_dvo), GFP_KERNEL);
498 if (!intel_dvo)
499 return;
500
501 connector = intel_connector_alloc();
502 if (!connector) {
503 kfree(objp: intel_dvo);
504 return;
505 }
506
507 intel_dvo->attached_connector = connector;
508
509 encoder = &intel_dvo->base;
510
511 encoder->disable = intel_disable_dvo;
512 encoder->enable = intel_enable_dvo;
513 encoder->get_hw_state = intel_dvo_get_hw_state;
514 encoder->get_config = intel_dvo_get_config;
515 encoder->compute_config = intel_dvo_compute_config;
516 encoder->pre_enable = intel_dvo_pre_enable;
517 connector->get_hw_state = intel_dvo_connector_get_hw_state;
518
519 if (!intel_dvo_probe(i915, intel_dvo)) {
520 kfree(objp: intel_dvo);
521 intel_connector_free(connector);
522 return;
523 }
524
525 assert_port_valid(i915, port: intel_dvo->dev.port);
526
527 encoder->type = INTEL_OUTPUT_DVO;
528 encoder->power_domain = POWER_DOMAIN_PORT_OTHER;
529 encoder->port = intel_dvo->dev.port;
530 encoder->pipe_mask = ~0;
531
532 if (intel_dvo->dev.type != INTEL_DVO_CHIP_LVDS)
533 encoder->cloneable = BIT(INTEL_OUTPUT_ANALOG) |
534 BIT(INTEL_OUTPUT_DVO);
535
536 drm_encoder_init(dev: &i915->drm, encoder: &encoder->base,
537 funcs: &intel_dvo_enc_funcs,
538 encoder_type: intel_dvo_encoder_type(dvo: &intel_dvo->dev),
539 name: "DVO %c", port_name(encoder->port));
540
541 drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] detected %s\n",
542 encoder->base.base.id, encoder->base.name,
543 intel_dvo->dev.name);
544
545 if (intel_dvo->dev.type == INTEL_DVO_CHIP_TMDS)
546 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
547 DRM_CONNECTOR_POLL_DISCONNECT;
548 connector->base.polled = connector->polled;
549
550 drm_connector_init_with_ddc(dev: &i915->drm, connector: &connector->base,
551 funcs: &intel_dvo_connector_funcs,
552 connector_type: intel_dvo_connector_type(dvo: &intel_dvo->dev),
553 ddc: intel_gmbus_get_adapter(dev_priv: i915, GMBUS_PIN_DPC));
554
555 drm_connector_helper_add(connector: &connector->base,
556 funcs: &intel_dvo_connector_helper_funcs);
557 connector->base.display_info.subpixel_order = SubPixelHorizontalRGB;
558
559 intel_connector_attach_encoder(connector, encoder);
560
561 if (intel_dvo->dev.type == INTEL_DVO_CHIP_LVDS) {
562 /*
563 * For our LVDS chipsets, we should hopefully be able
564 * to dig the fixed panel mode out of the BIOS data.
565 * However, it's in a different format from the BIOS
566 * data on chipsets with integrated LVDS (stored in AIM
567 * headers, likely), so for now, just get the current
568 * mode being output through DVO.
569 */
570 intel_panel_add_encoder_fixed_mode(connector, encoder);
571
572 intel_panel_init(connector, NULL);
573 }
574}
575

source code of linux/drivers/gpu/drm/i915/display/intel_dvo.c