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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/i2c.h>
12#include <linux/module.h>
13#include <linux/io.h>
14#include <linux/platform_device.h>
15#include <linux/reset.h>
16
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_bridge.h>
19#include <drm/drm_debugfs.h>
20#include <drm/drm_drv.h>
21#include <drm/drm_edid.h>
22#include <drm/drm_file.h>
23#include <drm/drm_print.h>
24#include <drm/drm_probe_helper.h>
25
26#include <sound/hdmi-codec.h>
27
28#include "sti_hdmi.h"
29#include "sti_hdmi_tx3g4c28phy.h"
30#include "sti_vtg.h"
31
32#define HDMI_CFG 0x0000
33#define HDMI_INT_EN 0x0004
34#define HDMI_INT_STA 0x0008
35#define HDMI_INT_CLR 0x000C
36#define HDMI_STA 0x0010
37#define HDMI_ACTIVE_VID_XMIN 0x0100
38#define HDMI_ACTIVE_VID_XMAX 0x0104
39#define HDMI_ACTIVE_VID_YMIN 0x0108
40#define HDMI_ACTIVE_VID_YMAX 0x010C
41#define HDMI_DFLT_CHL0_DAT 0x0110
42#define HDMI_DFLT_CHL1_DAT 0x0114
43#define HDMI_DFLT_CHL2_DAT 0x0118
44#define HDMI_AUDIO_CFG 0x0200
45#define HDMI_SPDIF_FIFO_STATUS 0x0204
46#define HDMI_SW_DI_1_HEAD_WORD 0x0210
47#define HDMI_SW_DI_1_PKT_WORD0 0x0214
48#define HDMI_SW_DI_1_PKT_WORD1 0x0218
49#define HDMI_SW_DI_1_PKT_WORD2 0x021C
50#define HDMI_SW_DI_1_PKT_WORD3 0x0220
51#define HDMI_SW_DI_1_PKT_WORD4 0x0224
52#define HDMI_SW_DI_1_PKT_WORD5 0x0228
53#define HDMI_SW_DI_1_PKT_WORD6 0x022C
54#define HDMI_SW_DI_CFG 0x0230
55#define HDMI_SAMPLE_FLAT_MASK 0x0244
56#define HDMI_AUDN 0x0400
57#define HDMI_AUD_CTS 0x0404
58#define HDMI_SW_DI_2_HEAD_WORD 0x0600
59#define HDMI_SW_DI_2_PKT_WORD0 0x0604
60#define HDMI_SW_DI_2_PKT_WORD1 0x0608
61#define HDMI_SW_DI_2_PKT_WORD2 0x060C
62#define HDMI_SW_DI_2_PKT_WORD3 0x0610
63#define HDMI_SW_DI_2_PKT_WORD4 0x0614
64#define HDMI_SW_DI_2_PKT_WORD5 0x0618
65#define HDMI_SW_DI_2_PKT_WORD6 0x061C
66#define HDMI_SW_DI_3_HEAD_WORD 0x0620
67#define HDMI_SW_DI_3_PKT_WORD0 0x0624
68#define HDMI_SW_DI_3_PKT_WORD1 0x0628
69#define HDMI_SW_DI_3_PKT_WORD2 0x062C
70#define HDMI_SW_DI_3_PKT_WORD3 0x0630
71#define HDMI_SW_DI_3_PKT_WORD4 0x0634
72#define HDMI_SW_DI_3_PKT_WORD5 0x0638
73#define HDMI_SW_DI_3_PKT_WORD6 0x063C
74
75#define HDMI_IFRAME_SLOT_AVI 1
76#define HDMI_IFRAME_SLOT_AUDIO 2
77#define HDMI_IFRAME_SLOT_VENDOR 3
78
79#define XCAT(prefix, x, suffix) prefix ## x ## suffix
80#define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
81#define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0)
82#define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1)
83#define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2)
84#define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3)
85#define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4)
86#define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
87#define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
88
89#define HDMI_SW_DI_MAX_WORD 7
90
91#define HDMI_IFRAME_DISABLED 0x0
92#define HDMI_IFRAME_SINGLE_SHOT 0x1
93#define HDMI_IFRAME_FIELD 0x2
94#define HDMI_IFRAME_FRAME 0x3
95#define HDMI_IFRAME_MASK 0x3
96#define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */
97
98#define HDMI_CFG_DEVICE_EN BIT(0)
99#define HDMI_CFG_HDMI_NOT_DVI BIT(1)
100#define HDMI_CFG_HDCP_EN BIT(2)
101#define HDMI_CFG_ESS_NOT_OESS BIT(3)
102#define HDMI_CFG_H_SYNC_POL_NEG BIT(4)
103#define HDMI_CFG_V_SYNC_POL_NEG BIT(6)
104#define HDMI_CFG_422_EN BIT(8)
105#define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12)
106#define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13)
107#define HDMI_CFG_SW_RST_EN BIT(31)
108
109#define HDMI_INT_GLOBAL BIT(0)
110#define HDMI_INT_SW_RST BIT(1)
111#define HDMI_INT_PIX_CAP BIT(3)
112#define HDMI_INT_HOT_PLUG BIT(4)
113#define HDMI_INT_DLL_LCK BIT(5)
114#define HDMI_INT_NEW_FRAME BIT(6)
115#define HDMI_INT_GENCTRL_PKT BIT(7)
116#define HDMI_INT_AUDIO_FIFO_XRUN BIT(8)
117#define HDMI_INT_SINK_TERM_PRESENT BIT(11)
118
119#define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
120 | HDMI_INT_DLL_LCK \
121 | HDMI_INT_HOT_PLUG \
122 | HDMI_INT_GLOBAL)
123
124#define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
125 | HDMI_INT_AUDIO_FIFO_XRUN \
126 | HDMI_INT_GENCTRL_PKT \
127 | HDMI_INT_NEW_FRAME \
128 | HDMI_INT_DLL_LCK \
129 | HDMI_INT_HOT_PLUG \
130 | HDMI_INT_PIX_CAP \
131 | HDMI_INT_SW_RST \
132 | HDMI_INT_GLOBAL)
133
134#define HDMI_STA_SW_RST BIT(1)
135
136#define HDMI_AUD_CFG_8CH BIT(0)
137#define HDMI_AUD_CFG_SPDIF_DIV_2 BIT(1)
138#define HDMI_AUD_CFG_SPDIF_DIV_3 BIT(2)
139#define HDMI_AUD_CFG_SPDIF_CLK_DIV_4 (BIT(1) | BIT(2))
140#define HDMI_AUD_CFG_CTS_CLK_256FS BIT(12)
141#define HDMI_AUD_CFG_DTS_INVALID BIT(16)
142#define HDMI_AUD_CFG_ONE_BIT_INVALID (BIT(18) | BIT(19) | BIT(20) | BIT(21))
143#define HDMI_AUD_CFG_CH12_VALID BIT(28)
144#define HDMI_AUD_CFG_CH34_VALID BIT(29)
145#define HDMI_AUD_CFG_CH56_VALID BIT(30)
146#define HDMI_AUD_CFG_CH78_VALID BIT(31)
147
148/* sample flat mask */
149#define HDMI_SAMPLE_FLAT_NO 0
150#define HDMI_SAMPLE_FLAT_SP0 BIT(0)
151#define HDMI_SAMPLE_FLAT_SP1 BIT(1)
152#define HDMI_SAMPLE_FLAT_SP2 BIT(2)
153#define HDMI_SAMPLE_FLAT_SP3 BIT(3)
154#define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\
155 HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3)
156
157#define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0)
158#define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8)
159#define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16)
160
161struct sti_hdmi_connector {
162 struct drm_connector drm_connector;
163 struct drm_encoder *encoder;
164 struct sti_hdmi *hdmi;
165 struct drm_property *colorspace_property;
166};
167
168#define to_sti_hdmi_connector(x) \
169 container_of(x, struct sti_hdmi_connector, drm_connector)
170
171static const struct drm_prop_enum_list colorspace_mode_names[] = {
172 { HDMI_COLORSPACE_RGB, "rgb" },
173 { HDMI_COLORSPACE_YUV422, "yuv422" },
174 { HDMI_COLORSPACE_YUV444, "yuv444" },
175};
176
177u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
178{
179 return readl(hdmi->regs + offset);
180}
181
182void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset)
183{
184 writel(val, hdmi->regs + offset);
185}
186
187/*
188 * HDMI interrupt handler threaded
189 *
190 * @irq: irq number
191 * @arg: connector structure
192 */
193static irqreturn_t hdmi_irq_thread(int irq, void *arg)
194{
195 struct sti_hdmi *hdmi = arg;
196
197 /* Hot plug/unplug IRQ */
198 if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
199 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
200 if (hdmi->drm_dev)
201 drm_helper_hpd_irq_event(hdmi->drm_dev);
202 }
203
204 /* Sw reset and PLL lock are exclusive so we can use the same
205 * event to signal them
206 */
207 if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) {
208 hdmi->event_received = true;
209 wake_up_interruptible(&hdmi->wait_event);
210 }
211
212 /* Audio FIFO underrun IRQ */
213 if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN)
214 DRM_INFO("Warning: audio FIFO underrun occurs!\n");
215
216 return IRQ_HANDLED;
217}
218
219/*
220 * HDMI interrupt handler
221 *
222 * @irq: irq number
223 * @arg: connector structure
224 */
225static irqreturn_t hdmi_irq(int irq, void *arg)
226{
227 struct sti_hdmi *hdmi = arg;
228
229 /* read interrupt status */
230 hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA);
231
232 /* clear interrupt status */
233 hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR);
234
235 /* force sync bus write */
236 hdmi_read(hdmi, HDMI_INT_STA);
237
238 return IRQ_WAKE_THREAD;
239}
240
241/*
242 * Set hdmi active area depending on the drm display mode selected
243 *
244 * @hdmi: pointer on the hdmi internal structure
245 */
246static void hdmi_active_area(struct sti_hdmi *hdmi)
247{
248 u32 xmin, xmax;
249 u32 ymin, ymax;
250
251 xmin = sti_vtg_get_pixel_number(hdmi->mode, 1);
252 xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay);
253 ymin = sti_vtg_get_line_number(hdmi->mode, 0);
254 ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1);
255
256 hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN);
257 hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX);
258 hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN);
259 hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX);
260}
261
262/*
263 * Overall hdmi configuration
264 *
265 * @hdmi: pointer on the hdmi internal structure
266 */
267static void hdmi_config(struct sti_hdmi *hdmi)
268{
269 u32 conf;
270
271 DRM_DEBUG_DRIVER("\n");
272
273 /* Clear overrun and underrun fifo */
274 conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR;
275
276 /* Select encryption type and the framing mode */
277 conf |= HDMI_CFG_ESS_NOT_OESS;
278 if (hdmi->hdmi_monitor)
279 conf |= HDMI_CFG_HDMI_NOT_DVI;
280
281 /* Set Hsync polarity */
282 if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) {
283 DRM_DEBUG_DRIVER("H Sync Negative\n");
284 conf |= HDMI_CFG_H_SYNC_POL_NEG;
285 }
286
287 /* Set Vsync polarity */
288 if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) {
289 DRM_DEBUG_DRIVER("V Sync Negative\n");
290 conf |= HDMI_CFG_V_SYNC_POL_NEG;
291 }
292
293 /* Enable HDMI */
294 conf |= HDMI_CFG_DEVICE_EN;
295
296 hdmi_write(hdmi, conf, HDMI_CFG);
297}
298
299/*
300 * Helper to reset info frame
301 *
302 * @hdmi: pointer on the hdmi internal structure
303 * @slot: infoframe to reset
304 */
305static void hdmi_infoframe_reset(struct sti_hdmi *hdmi,
306 u32 slot)
307{
308 u32 val, i;
309 u32 head_offset, pack_offset;
310
311 switch (slot) {
312 case HDMI_IFRAME_SLOT_AVI:
313 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
314 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
315 break;
316 case HDMI_IFRAME_SLOT_AUDIO:
317 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
318 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
319 break;
320 case HDMI_IFRAME_SLOT_VENDOR:
321 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
322 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
323 break;
324 default:
325 DRM_ERROR("unsupported infoframe slot: %#x\n", slot);
326 return;
327 }
328
329 /* Disable transmission for the selected slot */
330 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
331 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
332 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
333
334 /* Reset info frame registers */
335 hdmi_write(hdmi, 0x0, head_offset);
336 for (i = 0; i < HDMI_SW_DI_MAX_WORD; i += sizeof(u32))
337 hdmi_write(hdmi, 0x0, pack_offset + i);
338}
339
340/*
341 * Helper to concatenate infoframe in 32 bits word
342 *
343 * @ptr: pointer on the hdmi internal structure
344 * @size: size to write
345 */
346static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size)
347{
348 unsigned long value = 0;
349 size_t i;
350
351 for (i = size; i > 0; i--)
352 value = (value << 8) | ptr[i - 1];
353
354 return value;
355}
356
357/*
358 * Helper to write info frame
359 *
360 * @hdmi: pointer on the hdmi internal structure
361 * @data: infoframe to write
362 * @size: size to write
363 */
364static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi,
365 const u8 *data,
366 size_t size)
367{
368 const u8 *ptr = data;
369 u32 val, slot, mode, i;
370 u32 head_offset, pack_offset;
371
372 switch (*ptr) {
373 case HDMI_INFOFRAME_TYPE_AVI:
374 slot = HDMI_IFRAME_SLOT_AVI;
375 mode = HDMI_IFRAME_FIELD;
376 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
377 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
378 break;
379 case HDMI_INFOFRAME_TYPE_AUDIO:
380 slot = HDMI_IFRAME_SLOT_AUDIO;
381 mode = HDMI_IFRAME_FRAME;
382 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
383 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
384 break;
385 case HDMI_INFOFRAME_TYPE_VENDOR:
386 slot = HDMI_IFRAME_SLOT_VENDOR;
387 mode = HDMI_IFRAME_FRAME;
388 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
389 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
390 break;
391 default:
392 DRM_ERROR("unsupported infoframe type: %#x\n", *ptr);
393 return;
394 }
395
396 /* Disable transmission slot for updated infoframe */
397 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
398 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
399 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
400
401 val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++);
402 val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++);
403 val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++);
404 writel(val, hdmi->regs + head_offset);
405
406 /*
407 * Each subpack contains 4 bytes
408 * The First Bytes of the first subpacket must contain the checksum
409 * Packet size is increase by one.
410 */
411 size = size - HDMI_INFOFRAME_HEADER_SIZE + 1;
412 for (i = 0; i < size; i += sizeof(u32)) {
413 size_t num;
414
415 num = min_t(size_t, size - i, sizeof(u32));
416 val = hdmi_infoframe_subpack(ptr, num);
417 ptr += sizeof(u32);
418 writel(val, hdmi->regs + pack_offset + i);
419 }
420
421 /* Enable transmission slot for updated infoframe */
422 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
423 val |= HDMI_IFRAME_CFG_DI_N(mode, slot);
424 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
425}
426
427/*
428 * Prepare and configure the AVI infoframe
429 *
430 * AVI infoframe are transmitted at least once per two video field and
431 * contains information about HDMI transmission mode such as color space,
432 * colorimetry, ...
433 *
434 * @hdmi: pointer on the hdmi internal structure
435 *
436 * Return negative value if error occurs
437 */
438static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
439{
440 struct drm_display_mode *mode = &hdmi->mode;
441 struct hdmi_avi_infoframe infoframe;
442 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
443 int ret;
444
445 DRM_DEBUG_DRIVER("\n");
446
447 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe,
448 hdmi->drm_connector, mode);
449 if (ret < 0) {
450 DRM_ERROR("failed to setup AVI infoframe: %d\n", ret);
451 return ret;
452 }
453
454 /* fixed infoframe configuration not linked to the mode */
455 infoframe.colorspace = hdmi->colorspace;
456 infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
457 infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
458
459 ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
460 if (ret < 0) {
461 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
462 return ret;
463 }
464
465 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
466
467 return 0;
468}
469
470/*
471 * Prepare and configure the AUDIO infoframe
472 *
473 * AUDIO infoframe are transmitted once per frame and
474 * contains information about HDMI transmission mode such as audio codec,
475 * sample size, ...
476 *
477 * @hdmi: pointer on the hdmi internal structure
478 *
479 * Return negative value if error occurs
480 */
481static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
482{
483 struct hdmi_audio_params *audio = &hdmi->audio;
484 u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
485 int ret, val;
486
487 DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__,
488 audio->enabled ? "enable" : "disable");
489 if (audio->enabled) {
490 /* set audio parameters stored*/
491 ret = hdmi_audio_infoframe_pack(&audio->cea, buffer,
492 sizeof(buffer));
493 if (ret < 0) {
494 DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
495 return ret;
496 }
497 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
498 } else {
499 /*disable audio info frame transmission */
500 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
501 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK,
502 HDMI_IFRAME_SLOT_AUDIO);
503 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
504 }
505
506 return 0;
507}
508
509/*
510 * Prepare and configure the VS infoframe
511 *
512 * Vendor Specific infoframe are transmitted once per frame and
513 * contains vendor specific information.
514 *
515 * @hdmi: pointer on the hdmi internal structure
516 *
517 * Return negative value if error occurs
518 */
519#define HDMI_VENDOR_INFOFRAME_MAX_SIZE 6
520static int hdmi_vendor_infoframe_config(struct sti_hdmi *hdmi)
521{
522 struct drm_display_mode *mode = &hdmi->mode;
523 struct hdmi_vendor_infoframe infoframe;
524 u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_VENDOR_INFOFRAME_MAX_SIZE];
525 int ret;
526
527 DRM_DEBUG_DRIVER("\n");
528
529 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe,
530 hdmi->drm_connector,
531 mode);
532 if (ret < 0) {
533 /*
534 * Going into that statement does not means vendor infoframe
535 * fails. It just informed us that vendor infoframe is not
536 * needed for the selected mode. Only 4k or stereoscopic 3D
537 * mode requires vendor infoframe. So just simply return 0.
538 */
539 return 0;
540 }
541
542 ret = hdmi_vendor_infoframe_pack(&infoframe, buffer, sizeof(buffer));
543 if (ret < 0) {
544 DRM_ERROR("failed to pack VS infoframe: %d\n", ret);
545 return ret;
546 }
547
548 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
549
550 return 0;
551}
552
553#define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */
554
555/*
556 * Software reset of the hdmi subsystem
557 *
558 * @hdmi: pointer on the hdmi internal structure
559 *
560 */
561static void hdmi_swreset(struct sti_hdmi *hdmi)
562{
563 u32 val;
564
565 DRM_DEBUG_DRIVER("\n");
566
567 /* Enable hdmi_audio clock only during hdmi reset */
568 if (clk_prepare_enable(hdmi->clk_audio))
569 DRM_INFO("Failed to prepare/enable hdmi_audio clk\n");
570
571 /* Sw reset */
572 hdmi->event_received = false;
573
574 val = hdmi_read(hdmi, HDMI_CFG);
575 val |= HDMI_CFG_SW_RST_EN;
576 hdmi_write(hdmi, val, HDMI_CFG);
577
578 /* Wait reset completed */
579 wait_event_interruptible_timeout(hdmi->wait_event,
580 hdmi->event_received,
581 msecs_to_jiffies
582 (HDMI_TIMEOUT_SWRESET));
583
584 /*
585 * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is
586 * set to '1' and clk_audio is running.
587 */
588 if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0)
589 DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n");
590
591 val = hdmi_read(hdmi, HDMI_CFG);
592 val &= ~HDMI_CFG_SW_RST_EN;
593 hdmi_write(hdmi, val, HDMI_CFG);
594
595 /* Disable hdmi_audio clock. Not used anymore for drm purpose */
596 clk_disable_unprepare(hdmi->clk_audio);
597}
598
599#define DBGFS_PRINT_STR(str1, str2) seq_printf(s, "%-24s %s\n", str1, str2)
600#define DBGFS_PRINT_INT(str1, int2) seq_printf(s, "%-24s %d\n", str1, int2)
601#define DBGFS_DUMP(str, reg) seq_printf(s, "%s %-25s 0x%08X", str, #reg, \
602 hdmi_read(hdmi, reg))
603#define DBGFS_DUMP_DI(reg, slot) DBGFS_DUMP("\n", reg(slot))
604
605static void hdmi_dbg_cfg(struct seq_file *s, int val)
606{
607 int tmp;
608
609 seq_putc(s, '\t');
610 tmp = val & HDMI_CFG_HDMI_NOT_DVI;
611 DBGFS_PRINT_STR("mode:", tmp ? "HDMI" : "DVI");
612 seq_puts(s, "\t\t\t\t\t");
613 tmp = val & HDMI_CFG_HDCP_EN;
614 DBGFS_PRINT_STR("HDCP:", tmp ? "enable" : "disable");
615 seq_puts(s, "\t\t\t\t\t");
616 tmp = val & HDMI_CFG_ESS_NOT_OESS;
617 DBGFS_PRINT_STR("HDCP mode:", tmp ? "ESS enable" : "OESS enable");
618 seq_puts(s, "\t\t\t\t\t");
619 tmp = val & HDMI_CFG_H_SYNC_POL_NEG;
620 DBGFS_PRINT_STR("Hsync polarity:", tmp ? "inverted" : "normal");
621 seq_puts(s, "\t\t\t\t\t");
622 tmp = val & HDMI_CFG_V_SYNC_POL_NEG;
623 DBGFS_PRINT_STR("Vsync polarity:", tmp ? "inverted" : "normal");
624 seq_puts(s, "\t\t\t\t\t");
625 tmp = val & HDMI_CFG_422_EN;
626 DBGFS_PRINT_STR("YUV422 format:", tmp ? "enable" : "disable");
627}
628
629static void hdmi_dbg_sta(struct seq_file *s, int val)
630{
631 int tmp;
632
633 seq_putc(s, '\t');
634 tmp = (val & HDMI_STA_DLL_LCK);
635 DBGFS_PRINT_STR("pll:", tmp ? "locked" : "not locked");
636 seq_puts(s, "\t\t\t\t\t");
637 tmp = (val & HDMI_STA_HOT_PLUG);
638 DBGFS_PRINT_STR("hdmi cable:", tmp ? "connected" : "not connected");
639}
640
641static void hdmi_dbg_sw_di_cfg(struct seq_file *s, int val)
642{
643 int tmp;
644 char *const en_di[] = {"no transmission",
645 "single transmission",
646 "once every field",
647 "once every frame"};
648
649 seq_putc(s, '\t');
650 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 1));
651 DBGFS_PRINT_STR("Data island 1:", en_di[tmp]);
652 seq_puts(s, "\t\t\t\t\t");
653 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 2)) >> 4;
654 DBGFS_PRINT_STR("Data island 2:", en_di[tmp]);
655 seq_puts(s, "\t\t\t\t\t");
656 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 3)) >> 8;
657 DBGFS_PRINT_STR("Data island 3:", en_di[tmp]);
658 seq_puts(s, "\t\t\t\t\t");
659 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 4)) >> 12;
660 DBGFS_PRINT_STR("Data island 4:", en_di[tmp]);
661 seq_puts(s, "\t\t\t\t\t");
662 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 5)) >> 16;
663 DBGFS_PRINT_STR("Data island 5:", en_di[tmp]);
664 seq_puts(s, "\t\t\t\t\t");
665 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 6)) >> 20;
666 DBGFS_PRINT_STR("Data island 6:", en_di[tmp]);
667}
668
669static int hdmi_dbg_show(struct seq_file *s, void *data)
670{
671 struct drm_info_node *node = s->private;
672 struct sti_hdmi *hdmi = (struct sti_hdmi *)node->info_ent->data;
673
674 seq_printf(s, "HDMI: (vaddr = 0x%p)", hdmi->regs);
675 DBGFS_DUMP("\n", HDMI_CFG);
676 hdmi_dbg_cfg(s, hdmi_read(hdmi, HDMI_CFG));
677 DBGFS_DUMP("", HDMI_INT_EN);
678 DBGFS_DUMP("\n", HDMI_STA);
679 hdmi_dbg_sta(s, hdmi_read(hdmi, HDMI_STA));
680 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMIN);
681 seq_putc(s, '\t');
682 DBGFS_PRINT_INT("Xmin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMIN));
683 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMAX);
684 seq_putc(s, '\t');
685 DBGFS_PRINT_INT("Xmax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMAX));
686 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMIN);
687 seq_putc(s, '\t');
688 DBGFS_PRINT_INT("Ymin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMIN));
689 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMAX);
690 seq_putc(s, '\t');
691 DBGFS_PRINT_INT("Ymax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMAX));
692 DBGFS_DUMP("", HDMI_SW_DI_CFG);
693 hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG));
694
695 DBGFS_DUMP("\n", HDMI_AUDIO_CFG);
696 DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS);
697 DBGFS_DUMP("\n", HDMI_AUDN);
698
699 seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):",
700 HDMI_IFRAME_SLOT_AVI);
701 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI);
702 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AVI);
703 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AVI);
704 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AVI);
705 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AVI);
706 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AVI);
707 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AVI);
708 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AVI);
709 seq_printf(s, "\n\n AUDIO Infoframe (Data Island slot N=%d):",
710 HDMI_IFRAME_SLOT_AUDIO);
711 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AUDIO);
712 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AUDIO);
713 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AUDIO);
714 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AUDIO);
715 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AUDIO);
716 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AUDIO);
717 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AUDIO);
718 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AUDIO);
719 seq_printf(s, "\n\n VENDOR SPECIFIC Infoframe (Data Island slot N=%d):",
720 HDMI_IFRAME_SLOT_VENDOR);
721 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_VENDOR);
722 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_VENDOR);
723 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_VENDOR);
724 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_VENDOR);
725 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_VENDOR);
726 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_VENDOR);
727 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_VENDOR);
728 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_VENDOR);
729 seq_putc(s, '\n');
730 return 0;
731}
732
733static struct drm_info_list hdmi_debugfs_files[] = {
734 { "hdmi", hdmi_dbg_show, 0, NULL },
735};
736
737static void hdmi_debugfs_init(struct sti_hdmi *hdmi, struct drm_minor *minor)
738{
739 unsigned int i;
740
741 for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_files); i++)
742 hdmi_debugfs_files[i].data = hdmi;
743
744 drm_debugfs_create_files(hdmi_debugfs_files,
745 ARRAY_SIZE(hdmi_debugfs_files),
746 minor->debugfs_root, minor);
747}
748
749static void sti_hdmi_disable(struct drm_bridge *bridge)
750{
751 struct sti_hdmi *hdmi = bridge->driver_private;
752
753 u32 val = hdmi_read(hdmi, HDMI_CFG);
754
755 if (!hdmi->enabled)
756 return;
757
758 DRM_DEBUG_DRIVER("\n");
759
760 /* Disable HDMI */
761 val &= ~HDMI_CFG_DEVICE_EN;
762 hdmi_write(hdmi, val, HDMI_CFG);
763
764 hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR);
765
766 /* Stop the phy */
767 hdmi->phy_ops->stop(hdmi);
768
769 /* Reset info frame transmission */
770 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI);
771 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO);
772 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_VENDOR);
773
774 /* Set the default channel data to be a dark red */
775 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
776 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);
777 hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT);
778
779 /* Disable/unprepare hdmi clock */
780 clk_disable_unprepare(hdmi->clk_phy);
781 clk_disable_unprepare(hdmi->clk_tmds);
782 clk_disable_unprepare(hdmi->clk_pix);
783
784 hdmi->enabled = false;
785
786 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
787}
788
789/*
790 * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
791 * clocks. None-coherent clocks means that audio and TMDS clocks have not the
792 * same source (drifts between clocks). In this case assumption is that CTS is
793 * automatically calculated by hardware.
794 *
795 * @audio_fs: audio frame clock frequency in Hz
796 *
797 * Values computed are based on table described in HDMI specification 1.4b
798 *
799 * Returns n value.
800 */
801static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
802{
803 unsigned int n;
804
805 switch (audio_fs) {
806 case 32000:
807 n = 4096;
808 break;
809 case 44100:
810 n = 6272;
811 break;
812 case 48000:
813 n = 6144;
814 break;
815 case 88200:
816 n = 6272 * 2;
817 break;
818 case 96000:
819 n = 6144 * 2;
820 break;
821 case 176400:
822 n = 6272 * 4;
823 break;
824 case 192000:
825 n = 6144 * 4;
826 break;
827 default:
828 /* Not pre-defined, recommended value: 128 * fs / 1000 */
829 n = (audio_fs * 128) / 1000;
830 }
831
832 return n;
833}
834
835static int hdmi_audio_configure(struct sti_hdmi *hdmi)
836{
837 int audio_cfg, n;
838 struct hdmi_audio_params *params = &hdmi->audio;
839 struct hdmi_audio_infoframe *info = ¶ms->cea;
840
841 DRM_DEBUG_DRIVER("\n");
842
843 if (!hdmi->enabled)
844 return 0;
845
846 /* update N parameter */
847 n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
848
849 DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
850 params->sample_rate, hdmi->mode.clock * 1000, n);
851 hdmi_write(hdmi, n, HDMI_AUDN);
852
853 /* update HDMI registers according to configuration */
854 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
855 HDMI_AUD_CFG_ONE_BIT_INVALID;
856
857 switch (info->channels) {
858 case 8:
859 audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
860 fallthrough;
861 case 6:
862 audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
863 fallthrough;
864 case 4:
865 audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
866 fallthrough;
867 case 2:
868 audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
869 break;
870 default:
871 DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
872 info->channels);
873 return -EINVAL;
874 }
875
876 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
877
878 return hdmi_audio_infoframe_config(hdmi);
879}
880
881static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
882{
883 struct sti_hdmi *hdmi = bridge->driver_private;
884
885 DRM_DEBUG_DRIVER("\n");
886
887 if (hdmi->enabled)
888 return;
889
890 /* Prepare/enable clocks */
891 if (clk_prepare_enable(hdmi->clk_pix))
892 DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
893 if (clk_prepare_enable(hdmi->clk_tmds))
894 DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
895 if (clk_prepare_enable(hdmi->clk_phy))
896 DRM_ERROR("Failed to prepare/enable hdmi_rejection_pll clk\n");
897
898 hdmi->enabled = true;
899
900 /* Program hdmi serializer and start phy */
901 if (!hdmi->phy_ops->start(hdmi)) {
902 DRM_ERROR("Unable to start hdmi phy\n");
903 return;
904 }
905
906 /* Program hdmi active area */
907 hdmi_active_area(hdmi);
908
909 /* Enable working interrupts */
910 hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
911
912 /* Program hdmi config */
913 hdmi_config(hdmi);
914
915 /* Program AVI infoframe */
916 if (hdmi_avi_infoframe_config(hdmi))
917 DRM_ERROR("Unable to configure AVI infoframe\n");
918
919 if (hdmi->audio.enabled) {
920 if (hdmi_audio_configure(hdmi))
921 DRM_ERROR("Unable to configure audio\n");
922 } else {
923 hdmi_audio_infoframe_config(hdmi);
924 }
925
926 /* Program VS infoframe */
927 if (hdmi_vendor_infoframe_config(hdmi))
928 DRM_ERROR("Unable to configure VS infoframe\n");
929
930 /* Sw reset */
931 hdmi_swreset(hdmi);
932}
933
934static void sti_hdmi_set_mode(struct drm_bridge *bridge,
935 const struct drm_display_mode *mode,
936 const struct drm_display_mode *adjusted_mode)
937{
938 struct sti_hdmi *hdmi = bridge->driver_private;
939 int ret;
940
941 DRM_DEBUG_DRIVER("\n");
942
943 /* Copy the drm display mode in the connector local structure */
944 drm_mode_copy(&hdmi->mode, mode);
945
946 /* Update clock framerate according to the selected mode */
947 ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
948 if (ret < 0) {
949 DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
950 mode->clock * 1000);
951 return;
952 }
953 ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
954 if (ret < 0) {
955 DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
956 mode->clock * 1000);
957 return;
958 }
959}
960
961static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
962{
963 /* do nothing */
964}
965
966static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
967 .pre_enable = sti_hdmi_pre_enable,
968 .enable = sti_hdmi_bridge_nope,
969 .disable = sti_hdmi_disable,
970 .post_disable = sti_hdmi_bridge_nope,
971 .mode_set = sti_hdmi_set_mode,
972};
973
974static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
975{
976 struct sti_hdmi_connector *hdmi_connector
977 = to_sti_hdmi_connector(connector);
978 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
979 struct edid *edid;
980 int count;
981
982 DRM_DEBUG_DRIVER("\n");
983
984 edid = drm_get_edid(connector, hdmi->ddc_adapt);
985 if (!edid)
986 goto fail;
987
988 hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
989 DRM_DEBUG_KMS("%s : %dx%d cm\n",
990 (hdmi->hdmi_monitor ? "hdmi monitor" : "dvi monitor"),
991 edid->width_cm, edid->height_cm);
992 cec_notifier_set_phys_addr_from_edid(hdmi->notifier, edid);
993
994 count = drm_add_edid_modes(connector, edid);
995 drm_connector_update_edid_property(connector, edid);
996
997 kfree(edid);
998 return count;
999
1000fail:
1001 DRM_ERROR("Can't read HDMI EDID\n");
1002 return 0;
1003}
1004
1005#define CLK_TOLERANCE_HZ 50
1006
1007static enum drm_mode_status
1008sti_hdmi_connector_mode_valid(struct drm_connector *connector,
1009 struct drm_display_mode *mode)
1010{
1011 int target = mode->clock * 1000;
1012 int target_min = target - CLK_TOLERANCE_HZ;
1013 int target_max = target + CLK_TOLERANCE_HZ;
1014 int result;
1015 struct sti_hdmi_connector *hdmi_connector
1016 = to_sti_hdmi_connector(connector);
1017 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1018
1019
1020 result = clk_round_rate(hdmi->clk_pix, target);
1021
1022 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
1023 target, result);
1024
1025 if ((result < target_min) || (result > target_max)) {
1026 DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
1027 return MODE_BAD;
1028 }
1029
1030 return MODE_OK;
1031}
1032
1033static const
1034struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
1035 .get_modes = sti_hdmi_connector_get_modes,
1036 .mode_valid = sti_hdmi_connector_mode_valid,
1037};
1038
1039/* get detection status of display device */
1040static enum drm_connector_status
1041sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
1042{
1043 struct sti_hdmi_connector *hdmi_connector
1044 = to_sti_hdmi_connector(connector);
1045 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1046
1047 DRM_DEBUG_DRIVER("\n");
1048
1049 if (hdmi->hpd) {
1050 DRM_DEBUG_DRIVER("hdmi cable connected\n");
1051 return connector_status_connected;
1052 }
1053
1054 DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
1055 cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
1056 return connector_status_disconnected;
1057}
1058
1059static void sti_hdmi_connector_init_property(struct drm_device *drm_dev,
1060 struct drm_connector *connector)
1061{
1062 struct sti_hdmi_connector *hdmi_connector
1063 = to_sti_hdmi_connector(connector);
1064 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1065 struct drm_property *prop;
1066
1067 /* colorspace property */
1068 hdmi->colorspace = DEFAULT_COLORSPACE_MODE;
1069 prop = drm_property_create_enum(drm_dev, 0, "colorspace",
1070 colorspace_mode_names,
1071 ARRAY_SIZE(colorspace_mode_names));
1072 if (!prop) {
1073 DRM_ERROR("fails to create colorspace property\n");
1074 return;
1075 }
1076 hdmi_connector->colorspace_property = prop;
1077 drm_object_attach_property(&connector->base, prop, hdmi->colorspace);
1078}
1079
1080static int
1081sti_hdmi_connector_set_property(struct drm_connector *connector,
1082 struct drm_connector_state *state,
1083 struct drm_property *property,
1084 uint64_t val)
1085{
1086 struct sti_hdmi_connector *hdmi_connector
1087 = to_sti_hdmi_connector(connector);
1088 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1089
1090 if (property == hdmi_connector->colorspace_property) {
1091 hdmi->colorspace = val;
1092 return 0;
1093 }
1094
1095 DRM_ERROR("failed to set hdmi connector property\n");
1096 return -EINVAL;
1097}
1098
1099static int
1100sti_hdmi_connector_get_property(struct drm_connector *connector,
1101 const struct drm_connector_state *state,
1102 struct drm_property *property,
1103 uint64_t *val)
1104{
1105 struct sti_hdmi_connector *hdmi_connector
1106 = to_sti_hdmi_connector(connector);
1107 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1108
1109 if (property == hdmi_connector->colorspace_property) {
1110 *val = hdmi->colorspace;
1111 return 0;
1112 }
1113
1114 DRM_ERROR("failed to get hdmi connector property\n");
1115 return -EINVAL;
1116}
1117
1118static int sti_hdmi_late_register(struct drm_connector *connector)
1119{
1120 struct sti_hdmi_connector *hdmi_connector
1121 = to_sti_hdmi_connector(connector);
1122 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1123
1124 hdmi_debugfs_init(hdmi, hdmi->drm_dev->primary);
1125
1126 return 0;
1127}
1128
1129static const struct drm_connector_funcs sti_hdmi_connector_funcs = {
1130 .fill_modes = drm_helper_probe_single_connector_modes,
1131 .detect = sti_hdmi_connector_detect,
1132 .destroy = drm_connector_cleanup,
1133 .reset = drm_atomic_helper_connector_reset,
1134 .atomic_set_property = sti_hdmi_connector_set_property,
1135 .atomic_get_property = sti_hdmi_connector_get_property,
1136 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1137 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1138 .late_register = sti_hdmi_late_register,
1139};
1140
1141static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
1142{
1143 struct drm_encoder *encoder;
1144
1145 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1146 if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
1147 return encoder;
1148 }
1149
1150 return NULL;
1151}
1152
1153static void hdmi_audio_shutdown(struct device *dev, void *data)
1154{
1155 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1156 int audio_cfg;
1157
1158 DRM_DEBUG_DRIVER("\n");
1159
1160 /* disable audio */
1161 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1162 HDMI_AUD_CFG_ONE_BIT_INVALID;
1163 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1164
1165 hdmi->audio.enabled = false;
1166 hdmi_audio_infoframe_config(hdmi);
1167}
1168
1169static int hdmi_audio_hw_params(struct device *dev,
1170 void *data,
1171 struct hdmi_codec_daifmt *daifmt,
1172 struct hdmi_codec_params *params)
1173{
1174 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1175 int ret;
1176
1177 DRM_DEBUG_DRIVER("\n");
1178
1179 if ((daifmt->fmt != HDMI_I2S) || daifmt->bit_clk_inv ||
1180 daifmt->frame_clk_inv || daifmt->bit_clk_provider ||
1181 daifmt->frame_clk_provider) {
1182 dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
1183 daifmt->bit_clk_inv, daifmt->frame_clk_inv,
1184 daifmt->bit_clk_provider,
1185 daifmt->frame_clk_provider);
1186 return -EINVAL;
1187 }
1188
1189 hdmi->audio.sample_width = params->sample_width;
1190 hdmi->audio.sample_rate = params->sample_rate;
1191 hdmi->audio.cea = params->cea;
1192
1193 hdmi->audio.enabled = true;
1194
1195 ret = hdmi_audio_configure(hdmi);
1196 if (ret < 0)
1197 return ret;
1198
1199 return 0;
1200}
1201
1202static int hdmi_audio_mute(struct device *dev, void *data,
1203 bool enable, int direction)
1204{
1205 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1206
1207 DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
1208
1209 if (enable)
1210 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
1211 else
1212 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
1213
1214 return 0;
1215}
1216
1217static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1218{
1219 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1220 struct drm_connector *connector = hdmi->drm_connector;
1221
1222 DRM_DEBUG_DRIVER("\n");
1223 memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
1224
1225 return 0;
1226}
1227
1228static const struct hdmi_codec_ops audio_codec_ops = {
1229 .hw_params = hdmi_audio_hw_params,
1230 .audio_shutdown = hdmi_audio_shutdown,
1231 .mute_stream = hdmi_audio_mute,
1232 .get_eld = hdmi_audio_get_eld,
1233 .no_capture_mute = 1,
1234};
1235
1236static int sti_hdmi_register_audio_driver(struct device *dev,
1237 struct sti_hdmi *hdmi)
1238{
1239 struct hdmi_codec_pdata codec_data = {
1240 .ops = &audio_codec_ops,
1241 .max_i2s_channels = 8,
1242 .i2s = 1,
1243 };
1244
1245 DRM_DEBUG_DRIVER("\n");
1246
1247 hdmi->audio.enabled = false;
1248
1249 hdmi->audio_pdev = platform_device_register_data(
1250 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
1251 &codec_data, sizeof(codec_data));
1252
1253 if (IS_ERR(hdmi->audio_pdev))
1254 return PTR_ERR(hdmi->audio_pdev);
1255
1256 DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
1257
1258 return 0;
1259}
1260
1261static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
1262{
1263 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1264 struct drm_device *drm_dev = data;
1265 struct drm_encoder *encoder;
1266 struct sti_hdmi_connector *connector;
1267 struct cec_connector_info conn_info;
1268 struct drm_connector *drm_connector;
1269 struct drm_bridge *bridge;
1270 int err;
1271
1272 /* Set the drm device handle */
1273 hdmi->drm_dev = drm_dev;
1274
1275 encoder = sti_hdmi_find_encoder(drm_dev);
1276 if (!encoder)
1277 return -EINVAL;
1278
1279 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
1280 if (!connector)
1281 return -EINVAL;
1282
1283 connector->hdmi = hdmi;
1284
1285 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
1286 if (!bridge)
1287 return -EINVAL;
1288
1289 bridge->driver_private = hdmi;
1290 bridge->funcs = &sti_hdmi_bridge_funcs;
1291 drm_bridge_attach(encoder, bridge, NULL, 0);
1292
1293 connector->encoder = encoder;
1294
1295 drm_connector = (struct drm_connector *)connector;
1296
1297 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
1298
1299 drm_connector_init_with_ddc(drm_dev, drm_connector,
1300 &sti_hdmi_connector_funcs,
1301 DRM_MODE_CONNECTOR_HDMIA,
1302 hdmi->ddc_adapt);
1303 drm_connector_helper_add(drm_connector,
1304 &sti_hdmi_connector_helper_funcs);
1305
1306 /* initialise property */
1307 sti_hdmi_connector_init_property(drm_dev, drm_connector);
1308
1309 hdmi->drm_connector = drm_connector;
1310
1311 err = drm_connector_attach_encoder(drm_connector, encoder);
1312 if (err) {
1313 DRM_ERROR("Failed to attach a connector to a encoder\n");
1314 goto err_sysfs;
1315 }
1316
1317 err = sti_hdmi_register_audio_driver(dev, hdmi);
1318 if (err) {
1319 DRM_ERROR("Failed to attach an audio codec\n");
1320 goto err_sysfs;
1321 }
1322
1323 /* Initialize audio infoframe */
1324 err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
1325 if (err) {
1326 DRM_ERROR("Failed to init audio infoframe\n");
1327 goto err_sysfs;
1328 }
1329
1330 cec_fill_conn_info_from_drm(&conn_info, drm_connector);
1331 hdmi->notifier = cec_notifier_conn_register(&hdmi->dev, NULL,
1332 &conn_info);
1333 if (!hdmi->notifier) {
1334 hdmi->drm_connector = NULL;
1335 return -ENOMEM;
1336 }
1337
1338 /* Enable default interrupts */
1339 hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
1340
1341 return 0;
1342
1343err_sysfs:
1344 hdmi->drm_connector = NULL;
1345 return -EINVAL;
1346}
1347
1348static void sti_hdmi_unbind(struct device *dev,
1349 struct device *master, void *data)
1350{
1351 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1352
1353 cec_notifier_conn_unregister(hdmi->notifier);
1354}
1355
1356static const struct component_ops sti_hdmi_ops = {
1357 .bind = sti_hdmi_bind,
1358 .unbind = sti_hdmi_unbind,
1359};
1360
1361static const struct of_device_id hdmi_of_match[] = {
1362 {
1363 .compatible = "st,stih407-hdmi",
1364 .data = &tx3g4c28phy_ops,
1365 }, {
1366 /* end node */
1367 }
1368};
1369MODULE_DEVICE_TABLE(of, hdmi_of_match);
1370
1371static int sti_hdmi_probe(struct platform_device *pdev)
1372{
1373 struct device *dev = &pdev->dev;
1374 struct sti_hdmi *hdmi;
1375 struct device_node *np = dev->of_node;
1376 struct resource *res;
1377 struct device_node *ddc;
1378 int ret;
1379
1380 DRM_INFO("%s\n", __func__);
1381
1382 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1383 if (!hdmi)
1384 return -ENOMEM;
1385
1386 ddc = of_parse_phandle(pdev->dev.of_node, "ddc", 0);
1387 if (ddc) {
1388 hdmi->ddc_adapt = of_get_i2c_adapter_by_node(ddc);
1389 of_node_put(ddc);
1390 if (!hdmi->ddc_adapt)
1391 return -EPROBE_DEFER;
1392 }
1393
1394 hdmi->dev = pdev->dev;
1395
1396 /* Get resources */
1397 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
1398 if (!res) {
1399 DRM_ERROR("Invalid hdmi resource\n");
1400 ret = -ENOMEM;
1401 goto release_adapter;
1402 }
1403 hdmi->regs = devm_ioremap(dev, res->start, resource_size(res));
1404 if (!hdmi->regs) {
1405 ret = -ENOMEM;
1406 goto release_adapter;
1407 }
1408
1409 hdmi->phy_ops = (struct hdmi_phy_ops *)
1410 of_match_node(hdmi_of_match, np)->data;
1411
1412 /* Get clock resources */
1413 hdmi->clk_pix = devm_clk_get(dev, "pix");
1414 if (IS_ERR(hdmi->clk_pix)) {
1415 DRM_ERROR("Cannot get hdmi_pix clock\n");
1416 ret = PTR_ERR(hdmi->clk_pix);
1417 goto release_adapter;
1418 }
1419
1420 hdmi->clk_tmds = devm_clk_get(dev, "tmds");
1421 if (IS_ERR(hdmi->clk_tmds)) {
1422 DRM_ERROR("Cannot get hdmi_tmds clock\n");
1423 ret = PTR_ERR(hdmi->clk_tmds);
1424 goto release_adapter;
1425 }
1426
1427 hdmi->clk_phy = devm_clk_get(dev, "phy");
1428 if (IS_ERR(hdmi->clk_phy)) {
1429 DRM_ERROR("Cannot get hdmi_phy clock\n");
1430 ret = PTR_ERR(hdmi->clk_phy);
1431 goto release_adapter;
1432 }
1433
1434 hdmi->clk_audio = devm_clk_get(dev, "audio");
1435 if (IS_ERR(hdmi->clk_audio)) {
1436 DRM_ERROR("Cannot get hdmi_audio clock\n");
1437 ret = PTR_ERR(hdmi->clk_audio);
1438 goto release_adapter;
1439 }
1440
1441 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
1442
1443 init_waitqueue_head(&hdmi->wait_event);
1444
1445 hdmi->irq = platform_get_irq_byname(pdev, "irq");
1446 if (hdmi->irq < 0) {
1447 DRM_ERROR("Cannot get HDMI irq\n");
1448 ret = hdmi->irq;
1449 goto release_adapter;
1450 }
1451
1452 ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
1453 hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
1454 if (ret) {
1455 DRM_ERROR("Failed to register HDMI interrupt\n");
1456 goto release_adapter;
1457 }
1458
1459 hdmi->reset = devm_reset_control_get(dev, "hdmi");
1460 /* Take hdmi out of reset */
1461 if (!IS_ERR(hdmi->reset))
1462 reset_control_deassert(hdmi->reset);
1463
1464 platform_set_drvdata(pdev, hdmi);
1465
1466 return component_add(&pdev->dev, &sti_hdmi_ops);
1467
1468 release_adapter:
1469 i2c_put_adapter(hdmi->ddc_adapt);
1470
1471 return ret;
1472}
1473
1474static int sti_hdmi_remove(struct platform_device *pdev)
1475{
1476 struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
1477
1478 i2c_put_adapter(hdmi->ddc_adapt);
1479 if (hdmi->audio_pdev)
1480 platform_device_unregister(hdmi->audio_pdev);
1481 component_del(&pdev->dev, &sti_hdmi_ops);
1482
1483 return 0;
1484}
1485
1486struct platform_driver sti_hdmi_driver = {
1487 .driver = {
1488 .name = "sti-hdmi",
1489 .owner = THIS_MODULE,
1490 .of_match_table = hdmi_of_match,
1491 },
1492 .probe = sti_hdmi_probe,
1493 .remove = sti_hdmi_remove,
1494};
1495
1496MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
1497MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
1498MODULE_LICENSE("GPL");