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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
5 */
6
7#include <linux/clk.h>
8#include <linux/component.h>
9#include <linux/debugfs.h>
10#include <linux/hdmi.h>
11#include <linux/module.h>
12#include <linux/of_gpio.h>
13#include <linux/platform_device.h>
14#include <linux/reset.h>
15
16#include <drm/drm_atomic_helper.h>
17#include <drm/drm_debugfs.h>
18#include <drm/drm_drv.h>
19#include <drm/drm_edid.h>
20#include <drm/drm_file.h>
21#include <drm/drm_print.h>
22#include <drm/drm_probe_helper.h>
23
24#include <sound/hdmi-codec.h>
25
26#include "sti_hdmi.h"
27#include "sti_hdmi_tx3g4c28phy.h"
28#include "sti_vtg.h"
29
30#define HDMI_CFG 0x0000
31#define HDMI_INT_EN 0x0004
32#define HDMI_INT_STA 0x0008
33#define HDMI_INT_CLR 0x000C
34#define HDMI_STA 0x0010
35#define HDMI_ACTIVE_VID_XMIN 0x0100
36#define HDMI_ACTIVE_VID_XMAX 0x0104
37#define HDMI_ACTIVE_VID_YMIN 0x0108
38#define HDMI_ACTIVE_VID_YMAX 0x010C
39#define HDMI_DFLT_CHL0_DAT 0x0110
40#define HDMI_DFLT_CHL1_DAT 0x0114
41#define HDMI_DFLT_CHL2_DAT 0x0118
42#define HDMI_AUDIO_CFG 0x0200
43#define HDMI_SPDIF_FIFO_STATUS 0x0204
44#define HDMI_SW_DI_1_HEAD_WORD 0x0210
45#define HDMI_SW_DI_1_PKT_WORD0 0x0214
46#define HDMI_SW_DI_1_PKT_WORD1 0x0218
47#define HDMI_SW_DI_1_PKT_WORD2 0x021C
48#define HDMI_SW_DI_1_PKT_WORD3 0x0220
49#define HDMI_SW_DI_1_PKT_WORD4 0x0224
50#define HDMI_SW_DI_1_PKT_WORD5 0x0228
51#define HDMI_SW_DI_1_PKT_WORD6 0x022C
52#define HDMI_SW_DI_CFG 0x0230
53#define HDMI_SAMPLE_FLAT_MASK 0x0244
54#define HDMI_AUDN 0x0400
55#define HDMI_AUD_CTS 0x0404
56#define HDMI_SW_DI_2_HEAD_WORD 0x0600
57#define HDMI_SW_DI_2_PKT_WORD0 0x0604
58#define HDMI_SW_DI_2_PKT_WORD1 0x0608
59#define HDMI_SW_DI_2_PKT_WORD2 0x060C
60#define HDMI_SW_DI_2_PKT_WORD3 0x0610
61#define HDMI_SW_DI_2_PKT_WORD4 0x0614
62#define HDMI_SW_DI_2_PKT_WORD5 0x0618
63#define HDMI_SW_DI_2_PKT_WORD6 0x061C
64#define HDMI_SW_DI_3_HEAD_WORD 0x0620
65#define HDMI_SW_DI_3_PKT_WORD0 0x0624
66#define HDMI_SW_DI_3_PKT_WORD1 0x0628
67#define HDMI_SW_DI_3_PKT_WORD2 0x062C
68#define HDMI_SW_DI_3_PKT_WORD3 0x0630
69#define HDMI_SW_DI_3_PKT_WORD4 0x0634
70#define HDMI_SW_DI_3_PKT_WORD5 0x0638
71#define HDMI_SW_DI_3_PKT_WORD6 0x063C
72
73#define HDMI_IFRAME_SLOT_AVI 1
74#define HDMI_IFRAME_SLOT_AUDIO 2
75#define HDMI_IFRAME_SLOT_VENDOR 3
76
77#define XCAT(prefix, x, suffix) prefix ## x ## suffix
78#define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
79#define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0)
80#define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1)
81#define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2)
82#define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3)
83#define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4)
84#define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
85#define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
86
87#define HDMI_SW_DI_MAX_WORD 7
88
89#define HDMI_IFRAME_DISABLED 0x0
90#define HDMI_IFRAME_SINGLE_SHOT 0x1
91#define HDMI_IFRAME_FIELD 0x2
92#define HDMI_IFRAME_FRAME 0x3
93#define HDMI_IFRAME_MASK 0x3
94#define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */
95
96#define HDMI_CFG_DEVICE_EN BIT(0)
97#define HDMI_CFG_HDMI_NOT_DVI BIT(1)
98#define HDMI_CFG_HDCP_EN BIT(2)
99#define HDMI_CFG_ESS_NOT_OESS BIT(3)
100#define HDMI_CFG_H_SYNC_POL_NEG BIT(4)
101#define HDMI_CFG_V_SYNC_POL_NEG BIT(6)
102#define HDMI_CFG_422_EN BIT(8)
103#define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12)
104#define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13)
105#define HDMI_CFG_SW_RST_EN BIT(31)
106
107#define HDMI_INT_GLOBAL BIT(0)
108#define HDMI_INT_SW_RST BIT(1)
109#define HDMI_INT_PIX_CAP BIT(3)
110#define HDMI_INT_HOT_PLUG BIT(4)
111#define HDMI_INT_DLL_LCK BIT(5)
112#define HDMI_INT_NEW_FRAME BIT(6)
113#define HDMI_INT_GENCTRL_PKT BIT(7)
114#define HDMI_INT_AUDIO_FIFO_XRUN BIT(8)
115#define HDMI_INT_SINK_TERM_PRESENT BIT(11)
116
117#define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
118 | HDMI_INT_DLL_LCK \
119 | HDMI_INT_HOT_PLUG \
120 | HDMI_INT_GLOBAL)
121
122#define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
123 | HDMI_INT_AUDIO_FIFO_XRUN \
124 | HDMI_INT_GENCTRL_PKT \
125 | HDMI_INT_NEW_FRAME \
126 | HDMI_INT_DLL_LCK \
127 | HDMI_INT_HOT_PLUG \
128 | HDMI_INT_PIX_CAP \
129 | HDMI_INT_SW_RST \
130 | HDMI_INT_GLOBAL)
131
132#define HDMI_STA_SW_RST BIT(1)
133
134#define HDMI_AUD_CFG_8CH BIT(0)
135#define HDMI_AUD_CFG_SPDIF_DIV_2 BIT(1)
136#define HDMI_AUD_CFG_SPDIF_DIV_3 BIT(2)
137#define HDMI_AUD_CFG_SPDIF_CLK_DIV_4 (BIT(1) | BIT(2))
138#define HDMI_AUD_CFG_CTS_CLK_256FS BIT(12)
139#define HDMI_AUD_CFG_DTS_INVALID BIT(16)
140#define HDMI_AUD_CFG_ONE_BIT_INVALID (BIT(18) | BIT(19) | BIT(20) | BIT(21))
141#define HDMI_AUD_CFG_CH12_VALID BIT(28)
142#define HDMI_AUD_CFG_CH34_VALID BIT(29)
143#define HDMI_AUD_CFG_CH56_VALID BIT(30)
144#define HDMI_AUD_CFG_CH78_VALID BIT(31)
145
146/* sample flat mask */
147#define HDMI_SAMPLE_FLAT_NO 0
148#define HDMI_SAMPLE_FLAT_SP0 BIT(0)
149#define HDMI_SAMPLE_FLAT_SP1 BIT(1)
150#define HDMI_SAMPLE_FLAT_SP2 BIT(2)
151#define HDMI_SAMPLE_FLAT_SP3 BIT(3)
152#define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\
153 HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3)
154
155#define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0)
156#define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8)
157#define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16)
158
159struct sti_hdmi_connector {
160 struct drm_connector drm_connector;
161 struct drm_encoder *encoder;
162 struct sti_hdmi *hdmi;
163 struct drm_property *colorspace_property;
164};
165
166#define to_sti_hdmi_connector(x) \
167 container_of(x, struct sti_hdmi_connector, drm_connector)
168
169u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
170{
171 return readl(hdmi->regs + offset);
172}
173
174void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset)
175{
176 writel(val, hdmi->regs + offset);
177}
178
179/**
180 * HDMI interrupt handler threaded
181 *
182 * @irq: irq number
183 * @arg: connector structure
184 */
185static irqreturn_t hdmi_irq_thread(int irq, void *arg)
186{
187 struct sti_hdmi *hdmi = arg;
188
189 /* Hot plug/unplug IRQ */
190 if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
191 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
192 if (hdmi->drm_dev)
193 drm_helper_hpd_irq_event(hdmi->drm_dev);
194 }
195
196 /* Sw reset and PLL lock are exclusive so we can use the same
197 * event to signal them
198 */
199 if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) {
200 hdmi->event_received = true;
201 wake_up_interruptible(&hdmi->wait_event);
202 }
203
204 /* Audio FIFO underrun IRQ */
205 if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN)
206 DRM_INFO("Warning: audio FIFO underrun occurs!\n");
207
208 return IRQ_HANDLED;
209}
210
211/**
212 * HDMI interrupt handler
213 *
214 * @irq: irq number
215 * @arg: connector structure
216 */
217static irqreturn_t hdmi_irq(int irq, void *arg)
218{
219 struct sti_hdmi *hdmi = arg;
220
221 /* read interrupt status */
222 hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA);
223
224 /* clear interrupt status */
225 hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR);
226
227 /* force sync bus write */
228 hdmi_read(hdmi, HDMI_INT_STA);
229
230 return IRQ_WAKE_THREAD;
231}
232
233/**
234 * Set hdmi active area depending on the drm display mode selected
235 *
236 * @hdmi: pointer on the hdmi internal structure
237 */
238static void hdmi_active_area(struct sti_hdmi *hdmi)
239{
240 u32 xmin, xmax;
241 u32 ymin, ymax;
242
243 xmin = sti_vtg_get_pixel_number(hdmi->mode, 1);
244 xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay);
245 ymin = sti_vtg_get_line_number(hdmi->mode, 0);
246 ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1);
247
248 hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN);
249 hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX);
250 hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN);
251 hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX);
252}
253
254/**
255 * Overall hdmi configuration
256 *
257 * @hdmi: pointer on the hdmi internal structure
258 */
259static void hdmi_config(struct sti_hdmi *hdmi)
260{
261 u32 conf;
262
263 DRM_DEBUG_DRIVER("\n");
264
265 /* Clear overrun and underrun fifo */
266 conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR;
267
268 /* Select encryption type and the framing mode */
269 conf |= HDMI_CFG_ESS_NOT_OESS;
270 if (hdmi->hdmi_monitor)
271 conf |= HDMI_CFG_HDMI_NOT_DVI;
272
273 /* Set Hsync polarity */
274 if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) {
275 DRM_DEBUG_DRIVER("H Sync Negative\n");
276 conf |= HDMI_CFG_H_SYNC_POL_NEG;
277 }
278
279 /* Set Vsync polarity */
280 if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) {
281 DRM_DEBUG_DRIVER("V Sync Negative\n");
282 conf |= HDMI_CFG_V_SYNC_POL_NEG;
283 }
284
285 /* Enable HDMI */
286 conf |= HDMI_CFG_DEVICE_EN;
287
288 hdmi_write(hdmi, conf, HDMI_CFG);
289}
290
291/*
292 * Helper to reset info frame
293 *
294 * @hdmi: pointer on the hdmi internal structure
295 * @slot: infoframe to reset
296 */
297static void hdmi_infoframe_reset(struct sti_hdmi *hdmi,
298 u32 slot)
299{
300 u32 val, i;
301 u32 head_offset, pack_offset;
302
303 switch (slot) {
304 case HDMI_IFRAME_SLOT_AVI:
305 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
306 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
307 break;
308 case HDMI_IFRAME_SLOT_AUDIO:
309 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
310 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
311 break;
312 case HDMI_IFRAME_SLOT_VENDOR:
313 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
314 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
315 break;
316 default:
317 DRM_ERROR("unsupported infoframe slot: %#x\n", slot);
318 return;
319 }
320
321 /* Disable transmission for the selected slot */
322 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
323 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
324 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
325
326 /* Reset info frame registers */
327 hdmi_write(hdmi, 0x0, head_offset);
328 for (i = 0; i < HDMI_SW_DI_MAX_WORD; i += sizeof(u32))
329 hdmi_write(hdmi, 0x0, pack_offset + i);
330}
331
332/**
333 * Helper to concatenate infoframe in 32 bits word
334 *
335 * @ptr: pointer on the hdmi internal structure
336 * @data: infoframe to write
337 * @size: size to write
338 */
339static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size)
340{
341 unsigned long value = 0;
342 size_t i;
343
344 for (i = size; i > 0; i--)
345 value = (value << 8) | ptr[i - 1];
346
347 return value;
348}
349
350/**
351 * Helper to write info frame
352 *
353 * @hdmi: pointer on the hdmi internal structure
354 * @data: infoframe to write
355 * @size: size to write
356 */
357static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi,
358 const u8 *data,
359 size_t size)
360{
361 const u8 *ptr = data;
362 u32 val, slot, mode, i;
363 u32 head_offset, pack_offset;
364
365 switch (*ptr) {
366 case HDMI_INFOFRAME_TYPE_AVI:
367 slot = HDMI_IFRAME_SLOT_AVI;
368 mode = HDMI_IFRAME_FIELD;
369 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
370 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
371 break;
372 case HDMI_INFOFRAME_TYPE_AUDIO:
373 slot = HDMI_IFRAME_SLOT_AUDIO;
374 mode = HDMI_IFRAME_FRAME;
375 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
376 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
377 break;
378 case HDMI_INFOFRAME_TYPE_VENDOR:
379 slot = HDMI_IFRAME_SLOT_VENDOR;
380 mode = HDMI_IFRAME_FRAME;
381 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
382 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
383 break;
384 default:
385 DRM_ERROR("unsupported infoframe type: %#x\n", *ptr);
386 return;
387 }
388
389 /* Disable transmission slot for updated infoframe */
390 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
391 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
392 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
393
394 val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++);
395 val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++);
396 val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++);
397 writel(val, hdmi->regs + head_offset);
398
399 /*
400 * Each subpack contains 4 bytes
401 * The First Bytes of the first subpacket must contain the checksum
402 * Packet size is increase by one.
403 */
404 size = size - HDMI_INFOFRAME_HEADER_SIZE + 1;
405 for (i = 0; i < size; i += sizeof(u32)) {
406 size_t num;
407
408 num = min_t(size_t, size - i, sizeof(u32));
409 val = hdmi_infoframe_subpack(ptr, num);
410 ptr += sizeof(u32);
411 writel(val, hdmi->regs + pack_offset + i);
412 }
413
414 /* Enable transmission slot for updated infoframe */
415 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
416 val |= HDMI_IFRAME_CFG_DI_N(mode, slot);
417 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
418}
419
420/**
421 * Prepare and configure the AVI infoframe
422 *
423 * AVI infoframe are transmitted at least once per two video field and
424 * contains information about HDMI transmission mode such as color space,
425 * colorimetry, ...
426 *
427 * @hdmi: pointer on the hdmi internal structure
428 *
429 * Return negative value if error occurs
430 */
431static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
432{
433 struct drm_display_mode *mode = &hdmi->mode;
434 struct hdmi_avi_infoframe infoframe;
435 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
436 int ret;
437
438 DRM_DEBUG_DRIVER("\n");
439
440 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe,
441 hdmi->drm_connector, mode);
442 if (ret < 0) {
443 DRM_ERROR("failed to setup AVI infoframe: %d\n", ret);
444 return ret;
445 }
446
447 /* fixed infoframe configuration not linked to the mode */
448 infoframe.colorspace = hdmi->colorspace;
449 infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
450 infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
451
452 ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
453 if (ret < 0) {
454 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
455 return ret;
456 }
457
458 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
459
460 return 0;
461}
462
463/**
464 * Prepare and configure the AUDIO infoframe
465 *
466 * AUDIO infoframe are transmitted once per frame and
467 * contains information about HDMI transmission mode such as audio codec,
468 * sample size, ...
469 *
470 * @hdmi: pointer on the hdmi internal structure
471 *
472 * Return negative value if error occurs
473 */
474static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
475{
476 struct hdmi_audio_params *audio = &hdmi->audio;
477 u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
478 int ret, val;
479
480 DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__,
481 audio->enabled ? "enable" : "disable");
482 if (audio->enabled) {
483 /* set audio parameters stored*/
484 ret = hdmi_audio_infoframe_pack(&audio->cea, buffer,
485 sizeof(buffer));
486 if (ret < 0) {
487 DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
488 return ret;
489 }
490 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
491 } else {
492 /*disable audio info frame transmission */
493 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
494 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK,
495 HDMI_IFRAME_SLOT_AUDIO);
496 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
497 }
498
499 return 0;
500}
501
502/*
503 * Prepare and configure the VS infoframe
504 *
505 * Vendor Specific infoframe are transmitted once per frame and
506 * contains vendor specific information.
507 *
508 * @hdmi: pointer on the hdmi internal structure
509 *
510 * Return negative value if error occurs
511 */
512#define HDMI_VENDOR_INFOFRAME_MAX_SIZE 6
513static int hdmi_vendor_infoframe_config(struct sti_hdmi *hdmi)
514{
515 struct drm_display_mode *mode = &hdmi->mode;
516 struct hdmi_vendor_infoframe infoframe;
517 u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_VENDOR_INFOFRAME_MAX_SIZE];
518 int ret;
519
520 DRM_DEBUG_DRIVER("\n");
521
522 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe,
523 hdmi->drm_connector,
524 mode);
525 if (ret < 0) {
526 /*
527 * Going into that statement does not means vendor infoframe
528 * fails. It just informed us that vendor infoframe is not
529 * needed for the selected mode. Only 4k or stereoscopic 3D
530 * mode requires vendor infoframe. So just simply return 0.
531 */
532 return 0;
533 }
534
535 ret = hdmi_vendor_infoframe_pack(&infoframe, buffer, sizeof(buffer));
536 if (ret < 0) {
537 DRM_ERROR("failed to pack VS infoframe: %d\n", ret);
538 return ret;
539 }
540
541 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
542
543 return 0;
544}
545
546/**
547 * Software reset of the hdmi subsystem
548 *
549 * @hdmi: pointer on the hdmi internal structure
550 *
551 */
552#define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */
553static void hdmi_swreset(struct sti_hdmi *hdmi)
554{
555 u32 val;
556
557 DRM_DEBUG_DRIVER("\n");
558
559 /* Enable hdmi_audio clock only during hdmi reset */
560 if (clk_prepare_enable(hdmi->clk_audio))
561 DRM_INFO("Failed to prepare/enable hdmi_audio clk\n");
562
563 /* Sw reset */
564 hdmi->event_received = false;
565
566 val = hdmi_read(hdmi, HDMI_CFG);
567 val |= HDMI_CFG_SW_RST_EN;
568 hdmi_write(hdmi, val, HDMI_CFG);
569
570 /* Wait reset completed */
571 wait_event_interruptible_timeout(hdmi->wait_event,
572 hdmi->event_received,
573 msecs_to_jiffies
574 (HDMI_TIMEOUT_SWRESET));
575
576 /*
577 * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is
578 * set to '1' and clk_audio is running.
579 */
580 if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0)
581 DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n");
582
583 val = hdmi_read(hdmi, HDMI_CFG);
584 val &= ~HDMI_CFG_SW_RST_EN;
585 hdmi_write(hdmi, val, HDMI_CFG);
586
587 /* Disable hdmi_audio clock. Not used anymore for drm purpose */
588 clk_disable_unprepare(hdmi->clk_audio);
589}
590
591#define DBGFS_PRINT_STR(str1, str2) seq_printf(s, "%-24s %s\n", str1, str2)
592#define DBGFS_PRINT_INT(str1, int2) seq_printf(s, "%-24s %d\n", str1, int2)
593#define DBGFS_DUMP(str, reg) seq_printf(s, "%s %-25s 0x%08X", str, #reg, \
594 hdmi_read(hdmi, reg))
595#define DBGFS_DUMP_DI(reg, slot) DBGFS_DUMP("\n", reg(slot))
596
597static void hdmi_dbg_cfg(struct seq_file *s, int val)
598{
599 int tmp;
600
601 seq_putc(s, '\t');
602 tmp = val & HDMI_CFG_HDMI_NOT_DVI;
603 DBGFS_PRINT_STR("mode:", tmp ? "HDMI" : "DVI");
604 seq_puts(s, "\t\t\t\t\t");
605 tmp = val & HDMI_CFG_HDCP_EN;
606 DBGFS_PRINT_STR("HDCP:", tmp ? "enable" : "disable");
607 seq_puts(s, "\t\t\t\t\t");
608 tmp = val & HDMI_CFG_ESS_NOT_OESS;
609 DBGFS_PRINT_STR("HDCP mode:", tmp ? "ESS enable" : "OESS enable");
610 seq_puts(s, "\t\t\t\t\t");
611 tmp = val & HDMI_CFG_H_SYNC_POL_NEG;
612 DBGFS_PRINT_STR("Hsync polarity:", tmp ? "inverted" : "normal");
613 seq_puts(s, "\t\t\t\t\t");
614 tmp = val & HDMI_CFG_V_SYNC_POL_NEG;
615 DBGFS_PRINT_STR("Vsync polarity:", tmp ? "inverted" : "normal");
616 seq_puts(s, "\t\t\t\t\t");
617 tmp = val & HDMI_CFG_422_EN;
618 DBGFS_PRINT_STR("YUV422 format:", tmp ? "enable" : "disable");
619}
620
621static void hdmi_dbg_sta(struct seq_file *s, int val)
622{
623 int tmp;
624
625 seq_putc(s, '\t');
626 tmp = (val & HDMI_STA_DLL_LCK);
627 DBGFS_PRINT_STR("pll:", tmp ? "locked" : "not locked");
628 seq_puts(s, "\t\t\t\t\t");
629 tmp = (val & HDMI_STA_HOT_PLUG);
630 DBGFS_PRINT_STR("hdmi cable:", tmp ? "connected" : "not connected");
631}
632
633static void hdmi_dbg_sw_di_cfg(struct seq_file *s, int val)
634{
635 int tmp;
636 char *const en_di[] = {"no transmission",
637 "single transmission",
638 "once every field",
639 "once every frame"};
640
641 seq_putc(s, '\t');
642 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 1));
643 DBGFS_PRINT_STR("Data island 1:", en_di[tmp]);
644 seq_puts(s, "\t\t\t\t\t");
645 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 2)) >> 4;
646 DBGFS_PRINT_STR("Data island 2:", en_di[tmp]);
647 seq_puts(s, "\t\t\t\t\t");
648 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 3)) >> 8;
649 DBGFS_PRINT_STR("Data island 3:", en_di[tmp]);
650 seq_puts(s, "\t\t\t\t\t");
651 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 4)) >> 12;
652 DBGFS_PRINT_STR("Data island 4:", en_di[tmp]);
653 seq_puts(s, "\t\t\t\t\t");
654 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 5)) >> 16;
655 DBGFS_PRINT_STR("Data island 5:", en_di[tmp]);
656 seq_puts(s, "\t\t\t\t\t");
657 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 6)) >> 20;
658 DBGFS_PRINT_STR("Data island 6:", en_di[tmp]);
659}
660
661static int hdmi_dbg_show(struct seq_file *s, void *data)
662{
663 struct drm_info_node *node = s->private;
664 struct sti_hdmi *hdmi = (struct sti_hdmi *)node->info_ent->data;
665
666 seq_printf(s, "HDMI: (vaddr = 0x%p)", hdmi->regs);
667 DBGFS_DUMP("\n", HDMI_CFG);
668 hdmi_dbg_cfg(s, hdmi_read(hdmi, HDMI_CFG));
669 DBGFS_DUMP("", HDMI_INT_EN);
670 DBGFS_DUMP("\n", HDMI_STA);
671 hdmi_dbg_sta(s, hdmi_read(hdmi, HDMI_STA));
672 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMIN);
673 seq_putc(s, '\t');
674 DBGFS_PRINT_INT("Xmin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMIN));
675 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMAX);
676 seq_putc(s, '\t');
677 DBGFS_PRINT_INT("Xmax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMAX));
678 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMIN);
679 seq_putc(s, '\t');
680 DBGFS_PRINT_INT("Ymin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMIN));
681 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMAX);
682 seq_putc(s, '\t');
683 DBGFS_PRINT_INT("Ymax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMAX));
684 DBGFS_DUMP("", HDMI_SW_DI_CFG);
685 hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG));
686
687 DBGFS_DUMP("\n", HDMI_AUDIO_CFG);
688 DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS);
689 DBGFS_DUMP("\n", HDMI_AUDN);
690
691 seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):",
692 HDMI_IFRAME_SLOT_AVI);
693 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI);
694 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AVI);
695 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AVI);
696 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AVI);
697 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AVI);
698 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AVI);
699 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AVI);
700 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AVI);
701 seq_printf(s, "\n\n AUDIO Infoframe (Data Island slot N=%d):",
702 HDMI_IFRAME_SLOT_AUDIO);
703 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AUDIO);
704 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AUDIO);
705 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AUDIO);
706 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AUDIO);
707 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AUDIO);
708 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AUDIO);
709 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AUDIO);
710 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AUDIO);
711 seq_printf(s, "\n\n VENDOR SPECIFIC Infoframe (Data Island slot N=%d):",
712 HDMI_IFRAME_SLOT_VENDOR);
713 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_VENDOR);
714 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_VENDOR);
715 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_VENDOR);
716 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_VENDOR);
717 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_VENDOR);
718 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_VENDOR);
719 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_VENDOR);
720 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_VENDOR);
721 seq_putc(s, '\n');
722 return 0;
723}
724
725static struct drm_info_list hdmi_debugfs_files[] = {
726 { "hdmi", hdmi_dbg_show, 0, NULL },
727};
728
729static int hdmi_debugfs_init(struct sti_hdmi *hdmi, struct drm_minor *minor)
730{
731 unsigned int i;
732
733 for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_files); i++)
734 hdmi_debugfs_files[i].data = hdmi;
735
736 return drm_debugfs_create_files(hdmi_debugfs_files,
737 ARRAY_SIZE(hdmi_debugfs_files),
738 minor->debugfs_root, minor);
739}
740
741static void sti_hdmi_disable(struct drm_bridge *bridge)
742{
743 struct sti_hdmi *hdmi = bridge->driver_private;
744
745 u32 val = hdmi_read(hdmi, HDMI_CFG);
746
747 if (!hdmi->enabled)
748 return;
749
750 DRM_DEBUG_DRIVER("\n");
751
752 /* Disable HDMI */
753 val &= ~HDMI_CFG_DEVICE_EN;
754 hdmi_write(hdmi, val, HDMI_CFG);
755
756 hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR);
757
758 /* Stop the phy */
759 hdmi->phy_ops->stop(hdmi);
760
761 /* Reset info frame transmission */
762 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI);
763 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO);
764 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_VENDOR);
765
766 /* Set the default channel data to be a dark red */
767 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
768 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);
769 hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT);
770
771 /* Disable/unprepare hdmi clock */
772 clk_disable_unprepare(hdmi->clk_phy);
773 clk_disable_unprepare(hdmi->clk_tmds);
774 clk_disable_unprepare(hdmi->clk_pix);
775
776 hdmi->enabled = false;
777
778 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
779}
780
781/**
782 * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
783 * clocks. None-coherent clocks means that audio and TMDS clocks have not the
784 * same source (drifts between clocks). In this case assumption is that CTS is
785 * automatically calculated by hardware.
786 *
787 * @audio_fs: audio frame clock frequency in Hz
788 *
789 * Values computed are based on table described in HDMI specification 1.4b
790 *
791 * Returns n value.
792 */
793static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
794{
795 unsigned int n;
796
797 switch (audio_fs) {
798 case 32000:
799 n = 4096;
800 break;
801 case 44100:
802 n = 6272;
803 break;
804 case 48000:
805 n = 6144;
806 break;
807 case 88200:
808 n = 6272 * 2;
809 break;
810 case 96000:
811 n = 6144 * 2;
812 break;
813 case 176400:
814 n = 6272 * 4;
815 break;
816 case 192000:
817 n = 6144 * 4;
818 break;
819 default:
820 /* Not pre-defined, recommended value: 128 * fs / 1000 */
821 n = (audio_fs * 128) / 1000;
822 }
823
824 return n;
825}
826
827static int hdmi_audio_configure(struct sti_hdmi *hdmi)
828{
829 int audio_cfg, n;
830 struct hdmi_audio_params *params = &hdmi->audio;
831 struct hdmi_audio_infoframe *info = ¶ms->cea;
832
833 DRM_DEBUG_DRIVER("\n");
834
835 if (!hdmi->enabled)
836 return 0;
837
838 /* update N parameter */
839 n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
840
841 DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
842 params->sample_rate, hdmi->mode.clock * 1000, n);
843 hdmi_write(hdmi, n, HDMI_AUDN);
844
845 /* update HDMI registers according to configuration */
846 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
847 HDMI_AUD_CFG_ONE_BIT_INVALID;
848
849 switch (info->channels) {
850 case 8:
851 audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
852 /* fall through */
853 case 6:
854 audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
855 /* fall through */
856 case 4:
857 audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
858 /* fall through */
859 case 2:
860 audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
861 break;
862 default:
863 DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
864 info->channels);
865 return -EINVAL;
866 }
867
868 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
869
870 return hdmi_audio_infoframe_config(hdmi);
871}
872
873static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
874{
875 struct sti_hdmi *hdmi = bridge->driver_private;
876
877 DRM_DEBUG_DRIVER("\n");
878
879 if (hdmi->enabled)
880 return;
881
882 /* Prepare/enable clocks */
883 if (clk_prepare_enable(hdmi->clk_pix))
884 DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
885 if (clk_prepare_enable(hdmi->clk_tmds))
886 DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
887 if (clk_prepare_enable(hdmi->clk_phy))
888 DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n");
889
890 hdmi->enabled = true;
891
892 /* Program hdmi serializer and start phy */
893 if (!hdmi->phy_ops->start(hdmi)) {
894 DRM_ERROR("Unable to start hdmi phy\n");
895 return;
896 }
897
898 /* Program hdmi active area */
899 hdmi_active_area(hdmi);
900
901 /* Enable working interrupts */
902 hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
903
904 /* Program hdmi config */
905 hdmi_config(hdmi);
906
907 /* Program AVI infoframe */
908 if (hdmi_avi_infoframe_config(hdmi))
909 DRM_ERROR("Unable to configure AVI infoframe\n");
910
911 if (hdmi->audio.enabled) {
912 if (hdmi_audio_configure(hdmi))
913 DRM_ERROR("Unable to configure audio\n");
914 } else {
915 hdmi_audio_infoframe_config(hdmi);
916 }
917
918 /* Program VS infoframe */
919 if (hdmi_vendor_infoframe_config(hdmi))
920 DRM_ERROR("Unable to configure VS infoframe\n");
921
922 /* Sw reset */
923 hdmi_swreset(hdmi);
924}
925
926static void sti_hdmi_set_mode(struct drm_bridge *bridge,
927 const struct drm_display_mode *mode,
928 const struct drm_display_mode *adjusted_mode)
929{
930 struct sti_hdmi *hdmi = bridge->driver_private;
931 int ret;
932
933 DRM_DEBUG_DRIVER("\n");
934
935 /* Copy the drm display mode in the connector local structure */
936 memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
937
938 /* Update clock framerate according to the selected mode */
939 ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
940 if (ret < 0) {
941 DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
942 mode->clock * 1000);
943 return;
944 }
945 ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
946 if (ret < 0) {
947 DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
948 mode->clock * 1000);
949 return;
950 }
951}
952
953static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
954{
955 /* do nothing */
956}
957
958static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
959 .pre_enable = sti_hdmi_pre_enable,
960 .enable = sti_hdmi_bridge_nope,
961 .disable = sti_hdmi_disable,
962 .post_disable = sti_hdmi_bridge_nope,
963 .mode_set = sti_hdmi_set_mode,
964};
965
966static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
967{
968 struct sti_hdmi_connector *hdmi_connector
969 = to_sti_hdmi_connector(connector);
970 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
971 struct edid *edid;
972 int count;
973
974 DRM_DEBUG_DRIVER("\n");
975
976 edid = drm_get_edid(connector, hdmi->ddc_adapt);
977 if (!edid)
978 goto fail;
979
980 hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
981 DRM_DEBUG_KMS("%s : %dx%d cm\n",
982 (hdmi->hdmi_monitor ? "hdmi monitor" : "dvi monitor"),
983 edid->width_cm, edid->height_cm);
984 cec_notifier_set_phys_addr_from_edid(hdmi->notifier, edid);
985
986 count = drm_add_edid_modes(connector, edid);
987 drm_connector_update_edid_property(connector, edid);
988
989 kfree(edid);
990 return count;
991
992fail:
993 DRM_ERROR("Can't read HDMI EDID\n");
994 return 0;
995}
996
997#define CLK_TOLERANCE_HZ 50
998
999static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
1000 struct drm_display_mode *mode)
1001{
1002 int target = mode->clock * 1000;
1003 int target_min = target - CLK_TOLERANCE_HZ;
1004 int target_max = target + CLK_TOLERANCE_HZ;
1005 int result;
1006 struct sti_hdmi_connector *hdmi_connector
1007 = to_sti_hdmi_connector(connector);
1008 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1009
1010
1011 result = clk_round_rate(hdmi->clk_pix, target);
1012
1013 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
1014 target, result);
1015
1016 if ((result < target_min) || (result > target_max)) {
1017 DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
1018 return MODE_BAD;
1019 }
1020
1021 return MODE_OK;
1022}
1023
1024static const
1025struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
1026 .get_modes = sti_hdmi_connector_get_modes,
1027 .mode_valid = sti_hdmi_connector_mode_valid,
1028};
1029
1030/* get detection status of display device */
1031static enum drm_connector_status
1032sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
1033{
1034 struct sti_hdmi_connector *hdmi_connector
1035 = to_sti_hdmi_connector(connector);
1036 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1037
1038 DRM_DEBUG_DRIVER("\n");
1039
1040 if (hdmi->hpd) {
1041 DRM_DEBUG_DRIVER("hdmi cable connected\n");
1042 return connector_status_connected;
1043 }
1044
1045 DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
1046 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
1047 return connector_status_disconnected;
1048}
1049
1050static void sti_hdmi_connector_init_property(struct drm_device *drm_dev,
1051 struct drm_connector *connector)
1052{
1053 struct sti_hdmi_connector *hdmi_connector
1054 = to_sti_hdmi_connector(connector);
1055 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1056 struct drm_property *prop;
1057
1058 /* colorspace property */
1059 hdmi->colorspace = DEFAULT_COLORSPACE_MODE;
1060 prop = drm_property_create_enum(drm_dev, 0, "colorspace",
1061 colorspace_mode_names,
1062 ARRAY_SIZE(colorspace_mode_names));
1063 if (!prop) {
1064 DRM_ERROR("fails to create colorspace property\n");
1065 return;
1066 }
1067 hdmi_connector->colorspace_property = prop;
1068 drm_object_attach_property(&connector->base, prop, hdmi->colorspace);
1069}
1070
1071static int
1072sti_hdmi_connector_set_property(struct drm_connector *connector,
1073 struct drm_connector_state *state,
1074 struct drm_property *property,
1075 uint64_t val)
1076{
1077 struct sti_hdmi_connector *hdmi_connector
1078 = to_sti_hdmi_connector(connector);
1079 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1080
1081 if (property == hdmi_connector->colorspace_property) {
1082 hdmi->colorspace = val;
1083 return 0;
1084 }
1085
1086 DRM_ERROR("failed to set hdmi connector property\n");
1087 return -EINVAL;
1088}
1089
1090static int
1091sti_hdmi_connector_get_property(struct drm_connector *connector,
1092 const struct drm_connector_state *state,
1093 struct drm_property *property,
1094 uint64_t *val)
1095{
1096 struct sti_hdmi_connector *hdmi_connector
1097 = to_sti_hdmi_connector(connector);
1098 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1099
1100 if (property == hdmi_connector->colorspace_property) {
1101 *val = hdmi->colorspace;
1102 return 0;
1103 }
1104
1105 DRM_ERROR("failed to get hdmi connector property\n");
1106 return -EINVAL;
1107}
1108
1109static int sti_hdmi_late_register(struct drm_connector *connector)
1110{
1111 struct sti_hdmi_connector *hdmi_connector
1112 = to_sti_hdmi_connector(connector);
1113 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1114
1115 if (hdmi_debugfs_init(hdmi, hdmi->drm_dev->primary)) {
1116 DRM_ERROR("HDMI debugfs setup failed\n");
1117 return -EINVAL;
1118 }
1119
1120 return 0;
1121}
1122
1123static const struct drm_connector_funcs sti_hdmi_connector_funcs = {
1124 .fill_modes = drm_helper_probe_single_connector_modes,
1125 .detect = sti_hdmi_connector_detect,
1126 .destroy = drm_connector_cleanup,
1127 .reset = drm_atomic_helper_connector_reset,
1128 .atomic_set_property = sti_hdmi_connector_set_property,
1129 .atomic_get_property = sti_hdmi_connector_get_property,
1130 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1131 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1132 .late_register = sti_hdmi_late_register,
1133};
1134
1135static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
1136{
1137 struct drm_encoder *encoder;
1138
1139 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1140 if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
1141 return encoder;
1142 }
1143
1144 return NULL;
1145}
1146
1147static void hdmi_audio_shutdown(struct device *dev, void *data)
1148{
1149 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1150 int audio_cfg;
1151
1152 DRM_DEBUG_DRIVER("\n");
1153
1154 /* disable audio */
1155 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1156 HDMI_AUD_CFG_ONE_BIT_INVALID;
1157 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1158
1159 hdmi->audio.enabled = false;
1160 hdmi_audio_infoframe_config(hdmi);
1161}
1162
1163static int hdmi_audio_hw_params(struct device *dev,
1164 void *data,
1165 struct hdmi_codec_daifmt *daifmt,
1166 struct hdmi_codec_params *params)
1167{
1168 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1169 int ret;
1170
1171 DRM_DEBUG_DRIVER("\n");
1172
1173 if ((daifmt->fmt != HDMI_I2S) || daifmt->bit_clk_inv ||
1174 daifmt->frame_clk_inv || daifmt->bit_clk_master ||
1175 daifmt->frame_clk_master) {
1176 dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
1177 daifmt->bit_clk_inv, daifmt->frame_clk_inv,
1178 daifmt->bit_clk_master,
1179 daifmt->frame_clk_master);
1180 return -EINVAL;
1181 }
1182
1183 hdmi->audio.sample_width = params->sample_width;
1184 hdmi->audio.sample_rate = params->sample_rate;
1185 hdmi->audio.cea = params->cea;
1186
1187 hdmi->audio.enabled = true;
1188
1189 ret = hdmi_audio_configure(hdmi);
1190 if (ret < 0)
1191 return ret;
1192
1193 return 0;
1194}
1195
1196static int hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
1197{
1198 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1199
1200 DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
1201
1202 if (enable)
1203 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
1204 else
1205 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
1206
1207 return 0;
1208}
1209
1210static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1211{
1212 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1213 struct drm_connector *connector = hdmi->drm_connector;
1214
1215 DRM_DEBUG_DRIVER("\n");
1216 memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
1217
1218 return 0;
1219}
1220
1221static const struct hdmi_codec_ops audio_codec_ops = {
1222 .hw_params = hdmi_audio_hw_params,
1223 .audio_shutdown = hdmi_audio_shutdown,
1224 .digital_mute = hdmi_audio_digital_mute,
1225 .get_eld = hdmi_audio_get_eld,
1226};
1227
1228static int sti_hdmi_register_audio_driver(struct device *dev,
1229 struct sti_hdmi *hdmi)
1230{
1231 struct hdmi_codec_pdata codec_data = {
1232 .ops = &audio_codec_ops,
1233 .max_i2s_channels = 8,
1234 .i2s = 1,
1235 };
1236
1237 DRM_DEBUG_DRIVER("\n");
1238
1239 hdmi->audio.enabled = false;
1240
1241 hdmi->audio_pdev = platform_device_register_data(
1242 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
1243 &codec_data, sizeof(codec_data));
1244
1245 if (IS_ERR(hdmi->audio_pdev))
1246 return PTR_ERR(hdmi->audio_pdev);
1247
1248 DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
1249
1250 return 0;
1251}
1252
1253static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
1254{
1255 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1256 struct drm_device *drm_dev = data;
1257 struct drm_encoder *encoder;
1258 struct sti_hdmi_connector *connector;
1259 struct drm_connector *drm_connector;
1260 struct drm_bridge *bridge;
1261 int err;
1262
1263 /* Set the drm device handle */
1264 hdmi->drm_dev = drm_dev;
1265
1266 encoder = sti_hdmi_find_encoder(drm_dev);
1267 if (!encoder)
1268 return -EINVAL;
1269
1270 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
1271 if (!connector)
1272 return -EINVAL;
1273
1274 connector->hdmi = hdmi;
1275
1276 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
1277 if (!bridge)
1278 return -EINVAL;
1279
1280 bridge->driver_private = hdmi;
1281 bridge->funcs = &sti_hdmi_bridge_funcs;
1282 drm_bridge_attach(encoder, bridge, NULL);
1283
1284 connector->encoder = encoder;
1285
1286 drm_connector = (struct drm_connector *)connector;
1287
1288 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
1289
1290 drm_connector_init_with_ddc(drm_dev, drm_connector,
1291 &sti_hdmi_connector_funcs,
1292 DRM_MODE_CONNECTOR_HDMIA,
1293 hdmi->ddc_adapt);
1294 drm_connector_helper_add(drm_connector,
1295 &sti_hdmi_connector_helper_funcs);
1296
1297 /* initialise property */
1298 sti_hdmi_connector_init_property(drm_dev, drm_connector);
1299
1300 hdmi->drm_connector = drm_connector;
1301
1302 err = drm_connector_attach_encoder(drm_connector, encoder);
1303 if (err) {
1304 DRM_ERROR("Failed to attach a connector to a encoder\n");
1305 goto err_sysfs;
1306 }
1307
1308 err = sti_hdmi_register_audio_driver(dev, hdmi);
1309 if (err) {
1310 DRM_ERROR("Failed to attach an audio codec\n");
1311 goto err_sysfs;
1312 }
1313
1314 /* Initialize audio infoframe */
1315 err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
1316 if (err) {
1317 DRM_ERROR("Failed to init audio infoframe\n");
1318 goto err_sysfs;
1319 }
1320
1321 /* Enable default interrupts */
1322 hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
1323
1324 return 0;
1325
1326err_sysfs:
1327 hdmi->drm_connector = NULL;
1328 return -EINVAL;
1329}
1330
1331static void sti_hdmi_unbind(struct device *dev,
1332 struct device *master, void *data)
1333{
1334}
1335
1336static const struct component_ops sti_hdmi_ops = {
1337 .bind = sti_hdmi_bind,
1338 .unbind = sti_hdmi_unbind,
1339};
1340
1341static const struct of_device_id hdmi_of_match[] = {
1342 {
1343 .compatible = "st,stih407-hdmi",
1344 .data = &tx3g4c28phy_ops,
1345 }, {
1346 /* end node */
1347 }
1348};
1349MODULE_DEVICE_TABLE(of, hdmi_of_match);
1350
1351static int sti_hdmi_probe(struct platform_device *pdev)
1352{
1353 struct device *dev = &pdev->dev;
1354 struct sti_hdmi *hdmi;
1355 struct device_node *np = dev->of_node;
1356 struct resource *res;
1357 struct device_node *ddc;
1358 int ret;
1359
1360 DRM_INFO("%s\n", __func__);
1361
1362 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1363 if (!hdmi)
1364 return -ENOMEM;
1365
1366 ddc = of_parse_phandle(pdev->dev.of_node, "ddc", 0);
1367 if (ddc) {
1368 hdmi->ddc_adapt = of_get_i2c_adapter_by_node(ddc);
1369 of_node_put(ddc);
1370 if (!hdmi->ddc_adapt)
1371 return -EPROBE_DEFER;
1372 }
1373
1374 hdmi->dev = pdev->dev;
1375
1376 /* Get resources */
1377 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
1378 if (!res) {
1379 DRM_ERROR("Invalid hdmi resource\n");
1380 ret = -ENOMEM;
1381 goto release_adapter;
1382 }
1383 hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
1384 if (!hdmi->regs) {
1385 ret = -ENOMEM;
1386 goto release_adapter;
1387 }
1388
1389 hdmi->phy_ops = (struct hdmi_phy_ops *)
1390 of_match_node(hdmi_of_match, np)->data;
1391
1392 /* Get clock resources */
1393 hdmi->clk_pix = devm_clk_get(dev, "pix");
1394 if (IS_ERR(hdmi->clk_pix)) {
1395 DRM_ERROR("Cannot get hdmi_pix clock\n");
1396 ret = PTR_ERR(hdmi->clk_pix);
1397 goto release_adapter;
1398 }
1399
1400 hdmi->clk_tmds = devm_clk_get(dev, "tmds");
1401 if (IS_ERR(hdmi->clk_tmds)) {
1402 DRM_ERROR("Cannot get hdmi_tmds clock\n");
1403 ret = PTR_ERR(hdmi->clk_tmds);
1404 goto release_adapter;
1405 }
1406
1407 hdmi->clk_phy = devm_clk_get(dev, "phy");
1408 if (IS_ERR(hdmi->clk_phy)) {
1409 DRM_ERROR("Cannot get hdmi_phy clock\n");
1410 ret = PTR_ERR(hdmi->clk_phy);
1411 goto release_adapter;
1412 }
1413
1414 hdmi->clk_audio = devm_clk_get(dev, "audio");
1415 if (IS_ERR(hdmi->clk_audio)) {
1416 DRM_ERROR("Cannot get hdmi_audio clock\n");
1417 ret = PTR_ERR(hdmi->clk_audio);
1418 goto release_adapter;
1419 }
1420
1421 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
1422
1423 init_waitqueue_head(&hdmi->wait_event);
1424
1425 hdmi->irq = platform_get_irq_byname(pdev, "irq");
1426 if (hdmi->irq < 0) {
1427 DRM_ERROR("Cannot get HDMI irq\n");
1428 ret = hdmi->irq;
1429 goto release_adapter;
1430 }
1431
1432 ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
1433 hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
1434 if (ret) {
1435 DRM_ERROR("Failed to register HDMI interrupt\n");
1436 goto release_adapter;
1437 }
1438
1439 hdmi->notifier = cec_notifier_get(&pdev->dev);
1440 if (!hdmi->notifier)
1441 goto release_adapter;
1442
1443 hdmi->reset = devm_reset_control_get(dev, "hdmi");
1444 /* Take hdmi out of reset */
1445 if (!IS_ERR(hdmi->reset))
1446 reset_control_deassert(hdmi->reset);
1447
1448 platform_set_drvdata(pdev, hdmi);
1449
1450 return component_add(&pdev->dev, &sti_hdmi_ops);
1451
1452 release_adapter:
1453 i2c_put_adapter(hdmi->ddc_adapt);
1454
1455 return ret;
1456}
1457
1458static int sti_hdmi_remove(struct platform_device *pdev)
1459{
1460 struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
1461
1462 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
1463
1464 i2c_put_adapter(hdmi->ddc_adapt);
1465 if (hdmi->audio_pdev)
1466 platform_device_unregister(hdmi->audio_pdev);
1467 component_del(&pdev->dev, &sti_hdmi_ops);
1468
1469 cec_notifier_put(hdmi->notifier);
1470 return 0;
1471}
1472
1473struct platform_driver sti_hdmi_driver = {
1474 .driver = {
1475 .name = "sti-hdmi",
1476 .owner = THIS_MODULE,
1477 .of_match_table = hdmi_of_match,
1478 },
1479 .probe = sti_hdmi_probe,
1480 .remove = sti_hdmi_remove,
1481};
1482
1483MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
1484MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
1485MODULE_LICENSE("GPL");