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1/*
2 * Copyright (C) STMicroelectronics SA 2014
3 * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
4 * License terms: GNU General Public License (GPL), version 2
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/drmP.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_crtc_helper.h>
19#include <drm/drm_edid.h>
20
21#include <sound/hdmi-codec.h>
22
23#include "sti_hdmi.h"
24#include "sti_hdmi_tx3g4c28phy.h"
25#include "sti_vtg.h"
26
27#define HDMI_CFG 0x0000
28#define HDMI_INT_EN 0x0004
29#define HDMI_INT_STA 0x0008
30#define HDMI_INT_CLR 0x000C
31#define HDMI_STA 0x0010
32#define HDMI_ACTIVE_VID_XMIN 0x0100
33#define HDMI_ACTIVE_VID_XMAX 0x0104
34#define HDMI_ACTIVE_VID_YMIN 0x0108
35#define HDMI_ACTIVE_VID_YMAX 0x010C
36#define HDMI_DFLT_CHL0_DAT 0x0110
37#define HDMI_DFLT_CHL1_DAT 0x0114
38#define HDMI_DFLT_CHL2_DAT 0x0118
39#define HDMI_AUDIO_CFG 0x0200
40#define HDMI_SPDIF_FIFO_STATUS 0x0204
41#define HDMI_SW_DI_1_HEAD_WORD 0x0210
42#define HDMI_SW_DI_1_PKT_WORD0 0x0214
43#define HDMI_SW_DI_1_PKT_WORD1 0x0218
44#define HDMI_SW_DI_1_PKT_WORD2 0x021C
45#define HDMI_SW_DI_1_PKT_WORD3 0x0220
46#define HDMI_SW_DI_1_PKT_WORD4 0x0224
47#define HDMI_SW_DI_1_PKT_WORD5 0x0228
48#define HDMI_SW_DI_1_PKT_WORD6 0x022C
49#define HDMI_SW_DI_CFG 0x0230
50#define HDMI_SAMPLE_FLAT_MASK 0x0244
51#define HDMI_AUDN 0x0400
52#define HDMI_AUD_CTS 0x0404
53#define HDMI_SW_DI_2_HEAD_WORD 0x0600
54#define HDMI_SW_DI_2_PKT_WORD0 0x0604
55#define HDMI_SW_DI_2_PKT_WORD1 0x0608
56#define HDMI_SW_DI_2_PKT_WORD2 0x060C
57#define HDMI_SW_DI_2_PKT_WORD3 0x0610
58#define HDMI_SW_DI_2_PKT_WORD4 0x0614
59#define HDMI_SW_DI_2_PKT_WORD5 0x0618
60#define HDMI_SW_DI_2_PKT_WORD6 0x061C
61#define HDMI_SW_DI_3_HEAD_WORD 0x0620
62#define HDMI_SW_DI_3_PKT_WORD0 0x0624
63#define HDMI_SW_DI_3_PKT_WORD1 0x0628
64#define HDMI_SW_DI_3_PKT_WORD2 0x062C
65#define HDMI_SW_DI_3_PKT_WORD3 0x0630
66#define HDMI_SW_DI_3_PKT_WORD4 0x0634
67#define HDMI_SW_DI_3_PKT_WORD5 0x0638
68#define HDMI_SW_DI_3_PKT_WORD6 0x063C
69
70#define HDMI_IFRAME_SLOT_AVI 1
71#define HDMI_IFRAME_SLOT_AUDIO 2
72#define HDMI_IFRAME_SLOT_VENDOR 3
73
74#define XCAT(prefix, x, suffix) prefix ## x ## suffix
75#define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
76#define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0)
77#define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1)
78#define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2)
79#define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3)
80#define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4)
81#define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
82#define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
83
84#define HDMI_SW_DI_MAX_WORD 7
85
86#define HDMI_IFRAME_DISABLED 0x0
87#define HDMI_IFRAME_SINGLE_SHOT 0x1
88#define HDMI_IFRAME_FIELD 0x2
89#define HDMI_IFRAME_FRAME 0x3
90#define HDMI_IFRAME_MASK 0x3
91#define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */
92
93#define HDMI_CFG_DEVICE_EN BIT(0)
94#define HDMI_CFG_HDMI_NOT_DVI BIT(1)
95#define HDMI_CFG_HDCP_EN BIT(2)
96#define HDMI_CFG_ESS_NOT_OESS BIT(3)
97#define HDMI_CFG_H_SYNC_POL_NEG BIT(4)
98#define HDMI_CFG_SINK_TERM_DET_EN BIT(5)
99#define HDMI_CFG_V_SYNC_POL_NEG BIT(6)
100#define HDMI_CFG_422_EN BIT(8)
101#define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12)
102#define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13)
103#define HDMI_CFG_SW_RST_EN BIT(31)
104
105#define HDMI_INT_GLOBAL BIT(0)
106#define HDMI_INT_SW_RST BIT(1)
107#define HDMI_INT_PIX_CAP BIT(3)
108#define HDMI_INT_HOT_PLUG BIT(4)
109#define HDMI_INT_DLL_LCK BIT(5)
110#define HDMI_INT_NEW_FRAME BIT(6)
111#define HDMI_INT_GENCTRL_PKT BIT(7)
112#define HDMI_INT_AUDIO_FIFO_XRUN BIT(8)
113#define HDMI_INT_SINK_TERM_PRESENT BIT(11)
114
115#define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
116 | HDMI_INT_DLL_LCK \
117 | HDMI_INT_HOT_PLUG \
118 | HDMI_INT_GLOBAL)
119
120#define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
121 | HDMI_INT_AUDIO_FIFO_XRUN \
122 | HDMI_INT_GENCTRL_PKT \
123 | HDMI_INT_NEW_FRAME \
124 | HDMI_INT_DLL_LCK \
125 | HDMI_INT_HOT_PLUG \
126 | HDMI_INT_PIX_CAP \
127 | HDMI_INT_SW_RST \
128 | HDMI_INT_GLOBAL)
129
130#define HDMI_STA_SW_RST BIT(1)
131
132#define HDMI_AUD_CFG_8CH BIT(0)
133#define HDMI_AUD_CFG_SPDIF_DIV_2 BIT(1)
134#define HDMI_AUD_CFG_SPDIF_DIV_3 BIT(2)
135#define HDMI_AUD_CFG_SPDIF_CLK_DIV_4 (BIT(1) | BIT(2))
136#define HDMI_AUD_CFG_CTS_CLK_256FS BIT(12)
137#define HDMI_AUD_CFG_DTS_INVALID BIT(16)
138#define HDMI_AUD_CFG_ONE_BIT_INVALID (BIT(18) | BIT(19) | BIT(20) | BIT(21))
139#define HDMI_AUD_CFG_CH12_VALID BIT(28)
140#define HDMI_AUD_CFG_CH34_VALID BIT(29)
141#define HDMI_AUD_CFG_CH56_VALID BIT(30)
142#define HDMI_AUD_CFG_CH78_VALID BIT(31)
143
144/* sample flat mask */
145#define HDMI_SAMPLE_FLAT_NO 0
146#define HDMI_SAMPLE_FLAT_SP0 BIT(0)
147#define HDMI_SAMPLE_FLAT_SP1 BIT(1)
148#define HDMI_SAMPLE_FLAT_SP2 BIT(2)
149#define HDMI_SAMPLE_FLAT_SP3 BIT(3)
150#define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\
151 HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3)
152
153#define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0)
154#define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8)
155#define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16)
156
157struct sti_hdmi_connector {
158 struct drm_connector drm_connector;
159 struct drm_encoder *encoder;
160 struct sti_hdmi *hdmi;
161 struct drm_property *colorspace_property;
162 struct drm_property *hdmi_mode_property;
163};
164
165#define to_sti_hdmi_connector(x) \
166 container_of(x, struct sti_hdmi_connector, drm_connector)
167
168u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
169{
170 return readl(hdmi->regs + offset);
171}
172
173void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset)
174{
175 writel(val, hdmi->regs + offset);
176}
177
178/**
179 * HDMI interrupt handler threaded
180 *
181 * @irq: irq number
182 * @arg: connector structure
183 */
184static irqreturn_t hdmi_irq_thread(int irq, void *arg)
185{
186 struct sti_hdmi *hdmi = arg;
187
188 /* Hot plug/unplug IRQ */
189 if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
190 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
191 if (hdmi->drm_dev)
192 drm_helper_hpd_irq_event(hdmi->drm_dev);
193 }
194
195 /* Sw reset and PLL lock are exclusive so we can use the same
196 * event to signal them
197 */
198 if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) {
199 hdmi->event_received = true;
200 wake_up_interruptible(&hdmi->wait_event);
201 }
202
203 /* Audio FIFO underrun IRQ */
204 if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN)
205 DRM_INFO("Warning: audio FIFO underrun occurs!\n");
206
207 return IRQ_HANDLED;
208}
209
210/**
211 * HDMI interrupt handler
212 *
213 * @irq: irq number
214 * @arg: connector structure
215 */
216static irqreturn_t hdmi_irq(int irq, void *arg)
217{
218 struct sti_hdmi *hdmi = arg;
219
220 /* read interrupt status */
221 hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA);
222
223 /* clear interrupt status */
224 hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR);
225
226 /* force sync bus write */
227 hdmi_read(hdmi, HDMI_INT_STA);
228
229 return IRQ_WAKE_THREAD;
230}
231
232/**
233 * Set hdmi active area depending on the drm display mode selected
234 *
235 * @hdmi: pointer on the hdmi internal structure
236 */
237static void hdmi_active_area(struct sti_hdmi *hdmi)
238{
239 u32 xmin, xmax;
240 u32 ymin, ymax;
241
242 xmin = sti_vtg_get_pixel_number(hdmi->mode, 1);
243 xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay);
244 ymin = sti_vtg_get_line_number(hdmi->mode, 0);
245 ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1);
246
247 hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN);
248 hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX);
249 hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN);
250 hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX);
251}
252
253/**
254 * Overall hdmi configuration
255 *
256 * @hdmi: pointer on the hdmi internal structure
257 */
258static void hdmi_config(struct sti_hdmi *hdmi)
259{
260 u32 conf;
261
262 DRM_DEBUG_DRIVER("\n");
263
264 /* Clear overrun and underrun fifo */
265 conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR;
266
267 /* Select encryption type and the framing mode */
268 conf |= HDMI_CFG_ESS_NOT_OESS;
269 if (hdmi->hdmi_mode == HDMI_MODE_HDMI)
270 conf |= HDMI_CFG_HDMI_NOT_DVI;
271
272 /* Enable sink term detection */
273 conf |= HDMI_CFG_SINK_TERM_DET_EN;
274
275 /* Set Hsync polarity */
276 if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) {
277 DRM_DEBUG_DRIVER("H Sync Negative\n");
278 conf |= HDMI_CFG_H_SYNC_POL_NEG;
279 }
280
281 /* Set Vsync polarity */
282 if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) {
283 DRM_DEBUG_DRIVER("V Sync Negative\n");
284 conf |= HDMI_CFG_V_SYNC_POL_NEG;
285 }
286
287 /* Enable HDMI */
288 conf |= HDMI_CFG_DEVICE_EN;
289
290 hdmi_write(hdmi, conf, HDMI_CFG);
291}
292
293/*
294 * Helper to reset info frame
295 *
296 * @hdmi: pointer on the hdmi internal structure
297 * @slot: infoframe to reset
298 */
299static void hdmi_infoframe_reset(struct sti_hdmi *hdmi,
300 u32 slot)
301{
302 u32 val, i;
303 u32 head_offset, pack_offset;
304
305 switch (slot) {
306 case HDMI_IFRAME_SLOT_AVI:
307 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
308 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
309 break;
310 case HDMI_IFRAME_SLOT_AUDIO:
311 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
312 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
313 break;
314 case HDMI_IFRAME_SLOT_VENDOR:
315 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
316 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
317 break;
318 default:
319 DRM_ERROR("unsupported infoframe slot: %#x\n", slot);
320 return;
321 }
322
323 /* Disable transmission for the selected slot */
324 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
325 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
326 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
327
328 /* Reset info frame registers */
329 hdmi_write(hdmi, 0x0, head_offset);
330 for (i = 0; i < HDMI_SW_DI_MAX_WORD; i += sizeof(u32))
331 hdmi_write(hdmi, 0x0, pack_offset + i);
332}
333
334/**
335 * Helper to concatenate infoframe in 32 bits word
336 *
337 * @ptr: pointer on the hdmi internal structure
338 * @data: infoframe to write
339 * @size: size to write
340 */
341static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size)
342{
343 unsigned long value = 0;
344 size_t i;
345
346 for (i = size; i > 0; i--)
347 value = (value << 8) | ptr[i - 1];
348
349 return value;
350}
351
352/**
353 * Helper to write info frame
354 *
355 * @hdmi: pointer on the hdmi internal structure
356 * @data: infoframe to write
357 * @size: size to write
358 */
359static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi,
360 const u8 *data,
361 size_t size)
362{
363 const u8 *ptr = data;
364 u32 val, slot, mode, i;
365 u32 head_offset, pack_offset;
366
367 switch (*ptr) {
368 case HDMI_INFOFRAME_TYPE_AVI:
369 slot = HDMI_IFRAME_SLOT_AVI;
370 mode = HDMI_IFRAME_FIELD;
371 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
372 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
373 break;
374 case HDMI_INFOFRAME_TYPE_AUDIO:
375 slot = HDMI_IFRAME_SLOT_AUDIO;
376 mode = HDMI_IFRAME_FRAME;
377 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
378 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
379 break;
380 case HDMI_INFOFRAME_TYPE_VENDOR:
381 slot = HDMI_IFRAME_SLOT_VENDOR;
382 mode = HDMI_IFRAME_FRAME;
383 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
384 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
385 break;
386 default:
387 DRM_ERROR("unsupported infoframe type: %#x\n", *ptr);
388 return;
389 }
390
391 /* Disable transmission slot for updated infoframe */
392 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
393 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
394 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
395
396 val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++);
397 val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++);
398 val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++);
399 writel(val, hdmi->regs + head_offset);
400
401 /*
402 * Each subpack contains 4 bytes
403 * The First Bytes of the first subpacket must contain the checksum
404 * Packet size is increase by one.
405 */
406 size = size - HDMI_INFOFRAME_HEADER_SIZE + 1;
407 for (i = 0; i < size; i += sizeof(u32)) {
408 size_t num;
409
410 num = min_t(size_t, size - i, sizeof(u32));
411 val = hdmi_infoframe_subpack(ptr, num);
412 ptr += sizeof(u32);
413 writel(val, hdmi->regs + pack_offset + i);
414 }
415
416 /* Enable transmission slot for updated infoframe */
417 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
418 val |= HDMI_IFRAME_CFG_DI_N(mode, slot);
419 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
420}
421
422/**
423 * Prepare and configure the AVI infoframe
424 *
425 * AVI infoframe are transmitted at least once per two video field and
426 * contains information about HDMI transmission mode such as color space,
427 * colorimetry, ...
428 *
429 * @hdmi: pointer on the hdmi internal structure
430 *
431 * Return negative value if error occurs
432 */
433static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
434{
435 struct drm_display_mode *mode = &hdmi->mode;
436 struct hdmi_avi_infoframe infoframe;
437 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
438 int ret;
439
440 DRM_DEBUG_DRIVER("\n");
441
442 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, mode);
443 if (ret < 0) {
444 DRM_ERROR("failed to setup AVI infoframe: %d\n", ret);
445 return ret;
446 }
447
448 /* fixed infoframe configuration not linked to the mode */
449 infoframe.colorspace = hdmi->colorspace;
450 infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
451 infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
452
453 ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
454 if (ret < 0) {
455 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
456 return ret;
457 }
458
459 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
460
461 return 0;
462}
463
464/**
465 * Prepare and configure the AUDIO infoframe
466 *
467 * AUDIO infoframe are transmitted once per frame and
468 * contains information about HDMI transmission mode such as audio codec,
469 * sample size, ...
470 *
471 * @hdmi: pointer on the hdmi internal structure
472 *
473 * Return negative value if error occurs
474 */
475static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
476{
477 struct hdmi_audio_params *audio = &hdmi->audio;
478 u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
479 int ret, val;
480
481 DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__,
482 audio->enabled ? "enable" : "disable");
483 if (audio->enabled) {
484 /* set audio parameters stored*/
485 ret = hdmi_audio_infoframe_pack(&audio->cea, buffer,
486 sizeof(buffer));
487 if (ret < 0) {
488 DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
489 return ret;
490 }
491 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
492 } else {
493 /*disable audio info frame transmission */
494 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
495 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK,
496 HDMI_IFRAME_SLOT_AUDIO);
497 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
498 }
499
500 return 0;
501}
502
503/*
504 * Prepare and configure the VS infoframe
505 *
506 * Vendor Specific infoframe are transmitted once per frame and
507 * contains vendor specific information.
508 *
509 * @hdmi: pointer on the hdmi internal structure
510 *
511 * Return negative value if error occurs
512 */
513#define HDMI_VENDOR_INFOFRAME_MAX_SIZE 6
514static int hdmi_vendor_infoframe_config(struct sti_hdmi *hdmi)
515{
516 struct drm_display_mode *mode = &hdmi->mode;
517 struct hdmi_vendor_infoframe infoframe;
518 u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_VENDOR_INFOFRAME_MAX_SIZE];
519 int ret;
520
521 DRM_DEBUG_DRIVER("\n");
522
523 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe, mode);
524 if (ret < 0) {
525 /*
526 * Going into that statement does not means vendor infoframe
527 * fails. It just informed us that vendor infoframe is not
528 * needed for the selected mode. Only 4k or stereoscopic 3D
529 * mode requires vendor infoframe. So just simply return 0.
530 */
531 return 0;
532 }
533
534 ret = hdmi_vendor_infoframe_pack(&infoframe, buffer, sizeof(buffer));
535 if (ret < 0) {
536 DRM_ERROR("failed to pack VS infoframe: %d\n", ret);
537 return ret;
538 }
539
540 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
541
542 return 0;
543}
544
545/**
546 * Software reset of the hdmi subsystem
547 *
548 * @hdmi: pointer on the hdmi internal structure
549 *
550 */
551#define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */
552static void hdmi_swreset(struct sti_hdmi *hdmi)
553{
554 u32 val;
555
556 DRM_DEBUG_DRIVER("\n");
557
558 /* Enable hdmi_audio clock only during hdmi reset */
559 if (clk_prepare_enable(hdmi->clk_audio))
560 DRM_INFO("Failed to prepare/enable hdmi_audio clk\n");
561
562 /* Sw reset */
563 hdmi->event_received = false;
564
565 val = hdmi_read(hdmi, HDMI_CFG);
566 val |= HDMI_CFG_SW_RST_EN;
567 hdmi_write(hdmi, val, HDMI_CFG);
568
569 /* Wait reset completed */
570 wait_event_interruptible_timeout(hdmi->wait_event,
571 hdmi->event_received,
572 msecs_to_jiffies
573 (HDMI_TIMEOUT_SWRESET));
574
575 /*
576 * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is
577 * set to '1' and clk_audio is running.
578 */
579 if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0)
580 DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n");
581
582 val = hdmi_read(hdmi, HDMI_CFG);
583 val &= ~HDMI_CFG_SW_RST_EN;
584 hdmi_write(hdmi, val, HDMI_CFG);
585
586 /* Disable hdmi_audio clock. Not used anymore for drm purpose */
587 clk_disable_unprepare(hdmi->clk_audio);
588}
589
590#define DBGFS_PRINT_STR(str1, str2) seq_printf(s, "%-24s %s\n", str1, str2)
591#define DBGFS_PRINT_INT(str1, int2) seq_printf(s, "%-24s %d\n", str1, int2)
592#define DBGFS_DUMP(str, reg) seq_printf(s, "%s %-25s 0x%08X", str, #reg, \
593 hdmi_read(hdmi, reg))
594#define DBGFS_DUMP_DI(reg, slot) DBGFS_DUMP("\n", reg(slot))
595
596static void hdmi_dbg_cfg(struct seq_file *s, int val)
597{
598 int tmp;
599
600 seq_puts(s, "\t");
601 tmp = val & HDMI_CFG_HDMI_NOT_DVI;
602 DBGFS_PRINT_STR("mode:", tmp ? "HDMI" : "DVI");
603 seq_puts(s, "\t\t\t\t\t");
604 tmp = val & HDMI_CFG_HDCP_EN;
605 DBGFS_PRINT_STR("HDCP:", tmp ? "enable" : "disable");
606 seq_puts(s, "\t\t\t\t\t");
607 tmp = val & HDMI_CFG_ESS_NOT_OESS;
608 DBGFS_PRINT_STR("HDCP mode:", tmp ? "ESS enable" : "OESS enable");
609 seq_puts(s, "\t\t\t\t\t");
610 tmp = val & HDMI_CFG_SINK_TERM_DET_EN;
611 DBGFS_PRINT_STR("Sink term detection:", tmp ? "enable" : "disable");
612 seq_puts(s, "\t\t\t\t\t");
613 tmp = val & HDMI_CFG_H_SYNC_POL_NEG;
614 DBGFS_PRINT_STR("Hsync polarity:", tmp ? "inverted" : "normal");
615 seq_puts(s, "\t\t\t\t\t");
616 tmp = val & HDMI_CFG_V_SYNC_POL_NEG;
617 DBGFS_PRINT_STR("Vsync polarity:", tmp ? "inverted" : "normal");
618 seq_puts(s, "\t\t\t\t\t");
619 tmp = val & HDMI_CFG_422_EN;
620 DBGFS_PRINT_STR("YUV422 format:", tmp ? "enable" : "disable");
621}
622
623static void hdmi_dbg_sta(struct seq_file *s, int val)
624{
625 int tmp;
626
627 seq_puts(s, "\t");
628 tmp = (val & HDMI_STA_DLL_LCK);
629 DBGFS_PRINT_STR("pll:", tmp ? "locked" : "not locked");
630 seq_puts(s, "\t\t\t\t\t");
631 tmp = (val & HDMI_STA_HOT_PLUG);
632 DBGFS_PRINT_STR("hdmi cable:", tmp ? "connected" : "not connected");
633}
634
635static void hdmi_dbg_sw_di_cfg(struct seq_file *s, int val)
636{
637 int tmp;
638 char *const en_di[] = {"no transmission",
639 "single transmission",
640 "once every field",
641 "once every frame"};
642
643 seq_puts(s, "\t");
644 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 1));
645 DBGFS_PRINT_STR("Data island 1:", en_di[tmp]);
646 seq_puts(s, "\t\t\t\t\t");
647 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 2)) >> 4;
648 DBGFS_PRINT_STR("Data island 2:", en_di[tmp]);
649 seq_puts(s, "\t\t\t\t\t");
650 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 3)) >> 8;
651 DBGFS_PRINT_STR("Data island 3:", en_di[tmp]);
652 seq_puts(s, "\t\t\t\t\t");
653 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 4)) >> 12;
654 DBGFS_PRINT_STR("Data island 4:", en_di[tmp]);
655 seq_puts(s, "\t\t\t\t\t");
656 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 5)) >> 16;
657 DBGFS_PRINT_STR("Data island 5:", en_di[tmp]);
658 seq_puts(s, "\t\t\t\t\t");
659 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 6)) >> 20;
660 DBGFS_PRINT_STR("Data island 6:", en_di[tmp]);
661}
662
663static int hdmi_dbg_show(struct seq_file *s, void *data)
664{
665 struct drm_info_node *node = s->private;
666 struct sti_hdmi *hdmi = (struct sti_hdmi *)node->info_ent->data;
667
668 seq_printf(s, "HDMI: (vaddr = 0x%p)", hdmi->regs);
669 DBGFS_DUMP("\n", HDMI_CFG);
670 hdmi_dbg_cfg(s, hdmi_read(hdmi, HDMI_CFG));
671 DBGFS_DUMP("", HDMI_INT_EN);
672 DBGFS_DUMP("\n", HDMI_STA);
673 hdmi_dbg_sta(s, hdmi_read(hdmi, HDMI_STA));
674 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMIN);
675 seq_puts(s, "\t");
676 DBGFS_PRINT_INT("Xmin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMIN));
677 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMAX);
678 seq_puts(s, "\t");
679 DBGFS_PRINT_INT("Xmax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMAX));
680 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMIN);
681 seq_puts(s, "\t");
682 DBGFS_PRINT_INT("Ymin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMIN));
683 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMAX);
684 seq_puts(s, "\t");
685 DBGFS_PRINT_INT("Ymax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMAX));
686 DBGFS_DUMP("", HDMI_SW_DI_CFG);
687 hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG));
688
689 DBGFS_DUMP("\n", HDMI_AUDIO_CFG);
690 DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS);
691 DBGFS_DUMP("\n", HDMI_AUDN);
692
693 seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):",
694 HDMI_IFRAME_SLOT_AVI);
695 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI);
696 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AVI);
697 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AVI);
698 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AVI);
699 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AVI);
700 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AVI);
701 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AVI);
702 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AVI);
703 seq_puts(s, "\n");
704 seq_printf(s, "\n AUDIO Infoframe (Data Island slot N=%d):",
705 HDMI_IFRAME_SLOT_AUDIO);
706 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AUDIO);
707 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AUDIO);
708 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AUDIO);
709 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AUDIO);
710 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AUDIO);
711 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AUDIO);
712 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AUDIO);
713 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AUDIO);
714 seq_puts(s, "\n");
715 seq_printf(s, "\n VENDOR SPECIFIC Infoframe (Data Island slot N=%d):",
716 HDMI_IFRAME_SLOT_VENDOR);
717 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_VENDOR);
718 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_VENDOR);
719 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_VENDOR);
720 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_VENDOR);
721 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_VENDOR);
722 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_VENDOR);
723 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_VENDOR);
724 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_VENDOR);
725 seq_puts(s, "\n");
726
727 return 0;
728}
729
730static struct drm_info_list hdmi_debugfs_files[] = {
731 { "hdmi", hdmi_dbg_show, 0, NULL },
732};
733
734static void hdmi_debugfs_exit(struct sti_hdmi *hdmi, struct drm_minor *minor)
735{
736 drm_debugfs_remove_files(hdmi_debugfs_files,
737 ARRAY_SIZE(hdmi_debugfs_files),
738 minor);
739}
740
741static int hdmi_debugfs_init(struct sti_hdmi *hdmi, struct drm_minor *minor)
742{
743 unsigned int i;
744
745 for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_files); i++)
746 hdmi_debugfs_files[i].data = hdmi;
747
748 return drm_debugfs_create_files(hdmi_debugfs_files,
749 ARRAY_SIZE(hdmi_debugfs_files),
750 minor->debugfs_root, minor);
751}
752
753static void sti_hdmi_disable(struct drm_bridge *bridge)
754{
755 struct sti_hdmi *hdmi = bridge->driver_private;
756
757 u32 val = hdmi_read(hdmi, HDMI_CFG);
758
759 if (!hdmi->enabled)
760 return;
761
762 DRM_DEBUG_DRIVER("\n");
763
764 /* Disable HDMI */
765 val &= ~HDMI_CFG_DEVICE_EN;
766 hdmi_write(hdmi, val, HDMI_CFG);
767
768 hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR);
769
770 /* Stop the phy */
771 hdmi->phy_ops->stop(hdmi);
772
773 /* Reset info frame transmission */
774 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI);
775 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO);
776 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_VENDOR);
777
778 /* Set the default channel data to be a dark red */
779 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
780 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);
781 hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT);
782
783 /* Disable/unprepare hdmi clock */
784 clk_disable_unprepare(hdmi->clk_phy);
785 clk_disable_unprepare(hdmi->clk_tmds);
786 clk_disable_unprepare(hdmi->clk_pix);
787
788 hdmi->enabled = false;
789}
790
791static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
792{
793 struct sti_hdmi *hdmi = bridge->driver_private;
794
795 DRM_DEBUG_DRIVER("\n");
796
797 if (hdmi->enabled)
798 return;
799
800 /* Prepare/enable clocks */
801 if (clk_prepare_enable(hdmi->clk_pix))
802 DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
803 if (clk_prepare_enable(hdmi->clk_tmds))
804 DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
805 if (clk_prepare_enable(hdmi->clk_phy))
806 DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n");
807
808 hdmi->enabled = true;
809
810 /* Program hdmi serializer and start phy */
811 if (!hdmi->phy_ops->start(hdmi)) {
812 DRM_ERROR("Unable to start hdmi phy\n");
813 return;
814 }
815
816 /* Program hdmi active area */
817 hdmi_active_area(hdmi);
818
819 /* Enable working interrupts */
820 hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
821
822 /* Program hdmi config */
823 hdmi_config(hdmi);
824
825 /* Program AVI infoframe */
826 if (hdmi_avi_infoframe_config(hdmi))
827 DRM_ERROR("Unable to configure AVI infoframe\n");
828
829 /* Program AUDIO infoframe */
830 if (hdmi_audio_infoframe_config(hdmi))
831 DRM_ERROR("Unable to configure AUDIO infoframe\n");
832
833 /* Program VS infoframe */
834 if (hdmi_vendor_infoframe_config(hdmi))
835 DRM_ERROR("Unable to configure VS infoframe\n");
836
837 /* Sw reset */
838 hdmi_swreset(hdmi);
839}
840
841static void sti_hdmi_set_mode(struct drm_bridge *bridge,
842 struct drm_display_mode *mode,
843 struct drm_display_mode *adjusted_mode)
844{
845 struct sti_hdmi *hdmi = bridge->driver_private;
846 int ret;
847
848 DRM_DEBUG_DRIVER("\n");
849
850 /* Copy the drm display mode in the connector local structure */
851 memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
852
853 /* Update clock framerate according to the selected mode */
854 ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
855 if (ret < 0) {
856 DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
857 mode->clock * 1000);
858 return;
859 }
860 ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
861 if (ret < 0) {
862 DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
863 mode->clock * 1000);
864 return;
865 }
866}
867
868static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
869{
870 /* do nothing */
871}
872
873static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
874 .pre_enable = sti_hdmi_pre_enable,
875 .enable = sti_hdmi_bridge_nope,
876 .disable = sti_hdmi_disable,
877 .post_disable = sti_hdmi_bridge_nope,
878 .mode_set = sti_hdmi_set_mode,
879};
880
881static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
882{
883 struct sti_hdmi_connector *hdmi_connector
884 = to_sti_hdmi_connector(connector);
885 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
886 struct edid *edid;
887 int count;
888
889 DRM_DEBUG_DRIVER("\n");
890
891 edid = drm_get_edid(connector, hdmi->ddc_adapt);
892 if (!edid)
893 goto fail;
894
895 count = drm_add_edid_modes(connector, edid);
896 drm_mode_connector_update_edid_property(connector, edid);
897 drm_edid_to_eld(connector, edid);
898
899 kfree(edid);
900 return count;
901
902fail:
903 DRM_ERROR("Can't read HDMI EDID\n");
904 return 0;
905}
906
907#define CLK_TOLERANCE_HZ 50
908
909static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
910 struct drm_display_mode *mode)
911{
912 int target = mode->clock * 1000;
913 int target_min = target - CLK_TOLERANCE_HZ;
914 int target_max = target + CLK_TOLERANCE_HZ;
915 int result;
916 struct sti_hdmi_connector *hdmi_connector
917 = to_sti_hdmi_connector(connector);
918 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
919
920
921 result = clk_round_rate(hdmi->clk_pix, target);
922
923 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
924 target, result);
925
926 if ((result < target_min) || (result > target_max)) {
927 DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
928 return MODE_BAD;
929 }
930
931 return MODE_OK;
932}
933
934static const
935struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
936 .get_modes = sti_hdmi_connector_get_modes,
937 .mode_valid = sti_hdmi_connector_mode_valid,
938};
939
940/* get detection status of display device */
941static enum drm_connector_status
942sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
943{
944 struct sti_hdmi_connector *hdmi_connector
945 = to_sti_hdmi_connector(connector);
946 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
947
948 DRM_DEBUG_DRIVER("\n");
949
950 if (hdmi->hpd) {
951 DRM_DEBUG_DRIVER("hdmi cable connected\n");
952 return connector_status_connected;
953 }
954
955 DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
956 return connector_status_disconnected;
957}
958
959static void sti_hdmi_connector_init_property(struct drm_device *drm_dev,
960 struct drm_connector *connector)
961{
962 struct sti_hdmi_connector *hdmi_connector
963 = to_sti_hdmi_connector(connector);
964 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
965 struct drm_property *prop;
966
967 /* colorspace property */
968 hdmi->colorspace = DEFAULT_COLORSPACE_MODE;
969 prop = drm_property_create_enum(drm_dev, 0, "colorspace",
970 colorspace_mode_names,
971 ARRAY_SIZE(colorspace_mode_names));
972 if (!prop) {
973 DRM_ERROR("fails to create colorspace property\n");
974 return;
975 }
976 hdmi_connector->colorspace_property = prop;
977 drm_object_attach_property(&connector->base, prop, hdmi->colorspace);
978
979 /* hdmi_mode property */
980 hdmi->hdmi_mode = DEFAULT_HDMI_MODE;
981 prop = drm_property_create_enum(drm_dev, 0, "hdmi_mode",
982 hdmi_mode_names,
983 ARRAY_SIZE(hdmi_mode_names));
984 if (!prop) {
985 DRM_ERROR("fails to create colorspace property\n");
986 return;
987 }
988 hdmi_connector->hdmi_mode_property = prop;
989 drm_object_attach_property(&connector->base, prop, hdmi->hdmi_mode);
990
991}
992
993static int
994sti_hdmi_connector_set_property(struct drm_connector *connector,
995 struct drm_connector_state *state,
996 struct drm_property *property,
997 uint64_t val)
998{
999 struct sti_hdmi_connector *hdmi_connector
1000 = to_sti_hdmi_connector(connector);
1001 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1002
1003 if (property == hdmi_connector->colorspace_property) {
1004 hdmi->colorspace = val;
1005 return 0;
1006 }
1007
1008 if (property == hdmi_connector->hdmi_mode_property) {
1009 hdmi->hdmi_mode = val;
1010 return 0;
1011 }
1012
1013 DRM_ERROR("failed to set hdmi connector property\n");
1014 return -EINVAL;
1015}
1016
1017static int
1018sti_hdmi_connector_get_property(struct drm_connector *connector,
1019 const struct drm_connector_state *state,
1020 struct drm_property *property,
1021 uint64_t *val)
1022{
1023 struct sti_hdmi_connector *hdmi_connector
1024 = to_sti_hdmi_connector(connector);
1025 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1026
1027 if (property == hdmi_connector->colorspace_property) {
1028 *val = hdmi->colorspace;
1029 return 0;
1030 }
1031
1032 if (property == hdmi_connector->hdmi_mode_property) {
1033 *val = hdmi->hdmi_mode;
1034 return 0;
1035 }
1036
1037 DRM_ERROR("failed to get hdmi connector property\n");
1038 return -EINVAL;
1039}
1040
1041static int sti_hdmi_late_register(struct drm_connector *connector)
1042{
1043 struct sti_hdmi_connector *hdmi_connector
1044 = to_sti_hdmi_connector(connector);
1045 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1046
1047 if (hdmi_debugfs_init(hdmi, hdmi->drm_dev->primary)) {
1048 DRM_ERROR("HDMI debugfs setup failed\n");
1049 return -EINVAL;
1050 }
1051
1052 return 0;
1053}
1054
1055static const struct drm_connector_funcs sti_hdmi_connector_funcs = {
1056 .dpms = drm_atomic_helper_connector_dpms,
1057 .fill_modes = drm_helper_probe_single_connector_modes,
1058 .detect = sti_hdmi_connector_detect,
1059 .destroy = drm_connector_cleanup,
1060 .reset = drm_atomic_helper_connector_reset,
1061 .set_property = drm_atomic_helper_connector_set_property,
1062 .atomic_set_property = sti_hdmi_connector_set_property,
1063 .atomic_get_property = sti_hdmi_connector_get_property,
1064 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1065 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1066 .late_register = sti_hdmi_late_register,
1067};
1068
1069static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
1070{
1071 struct drm_encoder *encoder;
1072
1073 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1074 if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
1075 return encoder;
1076 }
1077
1078 return NULL;
1079}
1080
1081/**
1082 * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
1083 * clocks. None-coherent clocks means that audio and TMDS clocks have not the
1084 * same source (drifts between clocks). In this case assumption is that CTS is
1085 * automatically calculated by hardware.
1086 *
1087 * @audio_fs: audio frame clock frequency in Hz
1088 *
1089 * Values computed are based on table described in HDMI specification 1.4b
1090 *
1091 * Returns n value.
1092 */
1093static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
1094{
1095 unsigned int n;
1096
1097 switch (audio_fs) {
1098 case 32000:
1099 n = 4096;
1100 break;
1101 case 44100:
1102 n = 6272;
1103 break;
1104 case 48000:
1105 n = 6144;
1106 break;
1107 case 88200:
1108 n = 6272 * 2;
1109 break;
1110 case 96000:
1111 n = 6144 * 2;
1112 break;
1113 case 176400:
1114 n = 6272 * 4;
1115 break;
1116 case 192000:
1117 n = 6144 * 4;
1118 break;
1119 default:
1120 /* Not pre-defined, recommended value: 128 * fs / 1000 */
1121 n = (audio_fs * 128) / 1000;
1122 }
1123
1124 return n;
1125}
1126
1127static int hdmi_audio_configure(struct sti_hdmi *hdmi,
1128 struct hdmi_audio_params *params)
1129{
1130 int audio_cfg, n;
1131 struct hdmi_audio_infoframe *info = ¶ms->cea;
1132
1133 DRM_DEBUG_DRIVER("\n");
1134
1135 if (!hdmi->enabled)
1136 return 0;
1137
1138 /* update N parameter */
1139 n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
1140
1141 DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
1142 params->sample_rate, hdmi->mode.clock * 1000, n);
1143 hdmi_write(hdmi, n, HDMI_AUDN);
1144
1145 /* update HDMI registers according to configuration */
1146 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1147 HDMI_AUD_CFG_ONE_BIT_INVALID;
1148
1149 switch (info->channels) {
1150 case 8:
1151 audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
1152 case 6:
1153 audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
1154 case 4:
1155 audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
1156 case 2:
1157 audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
1158 break;
1159 default:
1160 DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
1161 info->channels);
1162 return -EINVAL;
1163 }
1164
1165 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1166
1167 hdmi->audio = *params;
1168
1169 return hdmi_audio_infoframe_config(hdmi);
1170}
1171
1172static void hdmi_audio_shutdown(struct device *dev, void *data)
1173{
1174 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1175 int audio_cfg;
1176
1177 DRM_DEBUG_DRIVER("\n");
1178
1179 /* disable audio */
1180 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1181 HDMI_AUD_CFG_ONE_BIT_INVALID;
1182 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1183
1184 hdmi->audio.enabled = false;
1185 hdmi_audio_infoframe_config(hdmi);
1186}
1187
1188static int hdmi_audio_hw_params(struct device *dev,
1189 void *data,
1190 struct hdmi_codec_daifmt *daifmt,
1191 struct hdmi_codec_params *params)
1192{
1193 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1194 int ret;
1195 struct hdmi_audio_params audio = {
1196 .sample_width = params->sample_width,
1197 .sample_rate = params->sample_rate,
1198 .cea = params->cea,
1199 };
1200
1201 DRM_DEBUG_DRIVER("\n");
1202
1203 if (!hdmi->enabled)
1204 return 0;
1205
1206 if ((daifmt->fmt != HDMI_I2S) || daifmt->bit_clk_inv ||
1207 daifmt->frame_clk_inv || daifmt->bit_clk_master ||
1208 daifmt->frame_clk_master) {
1209 dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
1210 daifmt->bit_clk_inv, daifmt->frame_clk_inv,
1211 daifmt->bit_clk_master,
1212 daifmt->frame_clk_master);
1213 return -EINVAL;
1214 }
1215
1216 audio.enabled = true;
1217
1218 ret = hdmi_audio_configure(hdmi, &audio);
1219 if (ret < 0)
1220 return ret;
1221
1222 return 0;
1223}
1224
1225static int hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
1226{
1227 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1228
1229 DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
1230
1231 if (enable)
1232 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
1233 else
1234 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
1235
1236 return 0;
1237}
1238
1239static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1240{
1241 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1242 struct drm_connector *connector = hdmi->drm_connector;
1243
1244 DRM_DEBUG_DRIVER("\n");
1245 memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
1246
1247 return 0;
1248}
1249
1250static const struct hdmi_codec_ops audio_codec_ops = {
1251 .hw_params = hdmi_audio_hw_params,
1252 .audio_shutdown = hdmi_audio_shutdown,
1253 .digital_mute = hdmi_audio_digital_mute,
1254 .get_eld = hdmi_audio_get_eld,
1255};
1256
1257static int sti_hdmi_register_audio_driver(struct device *dev,
1258 struct sti_hdmi *hdmi)
1259{
1260 struct hdmi_codec_pdata codec_data = {
1261 .ops = &audio_codec_ops,
1262 .max_i2s_channels = 8,
1263 .i2s = 1,
1264 };
1265
1266 DRM_DEBUG_DRIVER("\n");
1267
1268 hdmi->audio.enabled = false;
1269
1270 hdmi->audio_pdev = platform_device_register_data(
1271 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
1272 &codec_data, sizeof(codec_data));
1273
1274 if (IS_ERR(hdmi->audio_pdev))
1275 return PTR_ERR(hdmi->audio_pdev);
1276
1277 DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
1278
1279 return 0;
1280}
1281
1282static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
1283{
1284 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1285 struct drm_device *drm_dev = data;
1286 struct drm_encoder *encoder;
1287 struct sti_hdmi_connector *connector;
1288 struct drm_connector *drm_connector;
1289 struct drm_bridge *bridge;
1290 int err;
1291
1292 /* Set the drm device handle */
1293 hdmi->drm_dev = drm_dev;
1294
1295 encoder = sti_hdmi_find_encoder(drm_dev);
1296 if (!encoder)
1297 return -EINVAL;
1298
1299 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
1300 if (!connector)
1301 return -EINVAL;
1302
1303 connector->hdmi = hdmi;
1304
1305 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
1306 if (!bridge)
1307 return -EINVAL;
1308
1309 bridge->driver_private = hdmi;
1310 bridge->funcs = &sti_hdmi_bridge_funcs;
1311 drm_bridge_attach(drm_dev, bridge);
1312
1313 encoder->bridge = bridge;
1314 connector->encoder = encoder;
1315
1316 drm_connector = (struct drm_connector *)connector;
1317
1318 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
1319
1320 drm_connector_init(drm_dev, drm_connector,
1321 &sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA);
1322 drm_connector_helper_add(drm_connector,
1323 &sti_hdmi_connector_helper_funcs);
1324
1325 /* initialise property */
1326 sti_hdmi_connector_init_property(drm_dev, drm_connector);
1327
1328 hdmi->drm_connector = drm_connector;
1329
1330 err = drm_mode_connector_attach_encoder(drm_connector, encoder);
1331 if (err) {
1332 DRM_ERROR("Failed to attach a connector to a encoder\n");
1333 goto err_sysfs;
1334 }
1335
1336 err = sti_hdmi_register_audio_driver(dev, hdmi);
1337 if (err) {
1338 DRM_ERROR("Failed to attach an audio codec\n");
1339 goto err_sysfs;
1340 }
1341
1342 /* Initialize audio infoframe */
1343 err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
1344 if (err) {
1345 DRM_ERROR("Failed to init audio infoframe\n");
1346 goto err_sysfs;
1347 }
1348
1349 /* Enable default interrupts */
1350 hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
1351
1352 return 0;
1353
1354err_sysfs:
1355 drm_bridge_remove(bridge);
1356 hdmi->drm_connector = NULL;
1357 return -EINVAL;
1358}
1359
1360static void sti_hdmi_unbind(struct device *dev,
1361 struct device *master, void *data)
1362{
1363 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1364 struct drm_device *drm_dev = data;
1365
1366 hdmi_debugfs_exit(hdmi, drm_dev->primary);
1367}
1368
1369static const struct component_ops sti_hdmi_ops = {
1370 .bind = sti_hdmi_bind,
1371 .unbind = sti_hdmi_unbind,
1372};
1373
1374static const struct of_device_id hdmi_of_match[] = {
1375 {
1376 .compatible = "st,stih407-hdmi",
1377 .data = &tx3g4c28phy_ops,
1378 }, {
1379 /* end node */
1380 }
1381};
1382MODULE_DEVICE_TABLE(of, hdmi_of_match);
1383
1384static int sti_hdmi_probe(struct platform_device *pdev)
1385{
1386 struct device *dev = &pdev->dev;
1387 struct sti_hdmi *hdmi;
1388 struct device_node *np = dev->of_node;
1389 struct resource *res;
1390 struct device_node *ddc;
1391 int ret;
1392
1393 DRM_INFO("%s\n", __func__);
1394
1395 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1396 if (!hdmi)
1397 return -ENOMEM;
1398
1399 ddc = of_parse_phandle(pdev->dev.of_node, "ddc", 0);
1400 if (ddc) {
1401 hdmi->ddc_adapt = of_get_i2c_adapter_by_node(ddc);
1402 of_node_put(ddc);
1403 if (!hdmi->ddc_adapt)
1404 return -EPROBE_DEFER;
1405 }
1406
1407 hdmi->dev = pdev->dev;
1408
1409 /* Get resources */
1410 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
1411 if (!res) {
1412 DRM_ERROR("Invalid hdmi resource\n");
1413 ret = -ENOMEM;
1414 goto release_adapter;
1415 }
1416 hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
1417 if (!hdmi->regs) {
1418 ret = -ENOMEM;
1419 goto release_adapter;
1420 }
1421
1422 hdmi->phy_ops = (struct hdmi_phy_ops *)
1423 of_match_node(hdmi_of_match, np)->data;
1424
1425 /* Get clock resources */
1426 hdmi->clk_pix = devm_clk_get(dev, "pix");
1427 if (IS_ERR(hdmi->clk_pix)) {
1428 DRM_ERROR("Cannot get hdmi_pix clock\n");
1429 ret = PTR_ERR(hdmi->clk_pix);
1430 goto release_adapter;
1431 }
1432
1433 hdmi->clk_tmds = devm_clk_get(dev, "tmds");
1434 if (IS_ERR(hdmi->clk_tmds)) {
1435 DRM_ERROR("Cannot get hdmi_tmds clock\n");
1436 ret = PTR_ERR(hdmi->clk_tmds);
1437 goto release_adapter;
1438 }
1439
1440 hdmi->clk_phy = devm_clk_get(dev, "phy");
1441 if (IS_ERR(hdmi->clk_phy)) {
1442 DRM_ERROR("Cannot get hdmi_phy clock\n");
1443 ret = PTR_ERR(hdmi->clk_phy);
1444 goto release_adapter;
1445 }
1446
1447 hdmi->clk_audio = devm_clk_get(dev, "audio");
1448 if (IS_ERR(hdmi->clk_audio)) {
1449 DRM_ERROR("Cannot get hdmi_audio clock\n");
1450 ret = PTR_ERR(hdmi->clk_audio);
1451 goto release_adapter;
1452 }
1453
1454 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
1455
1456 init_waitqueue_head(&hdmi->wait_event);
1457
1458 hdmi->irq = platform_get_irq_byname(pdev, "irq");
1459
1460 ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
1461 hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
1462 if (ret) {
1463 DRM_ERROR("Failed to register HDMI interrupt\n");
1464 goto release_adapter;
1465 }
1466
1467 hdmi->reset = devm_reset_control_get(dev, "hdmi");
1468 /* Take hdmi out of reset */
1469 if (!IS_ERR(hdmi->reset))
1470 reset_control_deassert(hdmi->reset);
1471
1472 platform_set_drvdata(pdev, hdmi);
1473
1474 return component_add(&pdev->dev, &sti_hdmi_ops);
1475
1476 release_adapter:
1477 i2c_put_adapter(hdmi->ddc_adapt);
1478
1479 return ret;
1480}
1481
1482static int sti_hdmi_remove(struct platform_device *pdev)
1483{
1484 struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
1485
1486 i2c_put_adapter(hdmi->ddc_adapt);
1487 if (hdmi->audio_pdev)
1488 platform_device_unregister(hdmi->audio_pdev);
1489 component_del(&pdev->dev, &sti_hdmi_ops);
1490
1491 return 0;
1492}
1493
1494struct platform_driver sti_hdmi_driver = {
1495 .driver = {
1496 .name = "sti-hdmi",
1497 .owner = THIS_MODULE,
1498 .of_match_table = hdmi_of_match,
1499 },
1500 .probe = sti_hdmi_probe,
1501 .remove = sti_hdmi_remove,
1502};
1503
1504MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
1505MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
1506MODULE_LICENSE("GPL");