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Merge tag 'sti-drm-next-2017-01-06' of https://github.com/vinceab/linux into drm...
[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / sti / sti_hdmi.c
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
157 struct 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
168 u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
169 {
170 return readl(hdmi->regs + offset);
171 }
172
173 void 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 */
184 static 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 */
216 static 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 */
237 static 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 */
258 static 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 */
299 static 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 */
341 static 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 */
359 static 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 */
433 static 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 */
475 static 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
514 static 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 */
552 static 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
596 static 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
623 static 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
635 static 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
663 static 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
730 static struct drm_info_list hdmi_debugfs_files[] = {
731 { "hdmi", hdmi_dbg_show, 0, NULL },
732 };
733
734 static 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
741 static 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
753 static 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
791 /**
792 * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
793 * clocks. None-coherent clocks means that audio and TMDS clocks have not the
794 * same source (drifts between clocks). In this case assumption is that CTS is
795 * automatically calculated by hardware.
796 *
797 * @audio_fs: audio frame clock frequency in Hz
798 *
799 * Values computed are based on table described in HDMI specification 1.4b
800 *
801 * Returns n value.
802 */
803 static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
804 {
805 unsigned int n;
806
807 switch (audio_fs) {
808 case 32000:
809 n = 4096;
810 break;
811 case 44100:
812 n = 6272;
813 break;
814 case 48000:
815 n = 6144;
816 break;
817 case 88200:
818 n = 6272 * 2;
819 break;
820 case 96000:
821 n = 6144 * 2;
822 break;
823 case 176400:
824 n = 6272 * 4;
825 break;
826 case 192000:
827 n = 6144 * 4;
828 break;
829 default:
830 /* Not pre-defined, recommended value: 128 * fs / 1000 */
831 n = (audio_fs * 128) / 1000;
832 }
833
834 return n;
835 }
836
837 static int hdmi_audio_configure(struct sti_hdmi *hdmi)
838 {
839 int audio_cfg, n;
840 struct hdmi_audio_params *params = &hdmi->audio;
841 struct hdmi_audio_infoframe *info = &params->cea;
842
843 DRM_DEBUG_DRIVER("\n");
844
845 if (!hdmi->enabled)
846 return 0;
847
848 /* update N parameter */
849 n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
850
851 DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
852 params->sample_rate, hdmi->mode.clock * 1000, n);
853 hdmi_write(hdmi, n, HDMI_AUDN);
854
855 /* update HDMI registers according to configuration */
856 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
857 HDMI_AUD_CFG_ONE_BIT_INVALID;
858
859 switch (info->channels) {
860 case 8:
861 audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
862 case 6:
863 audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
864 case 4:
865 audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
866 case 2:
867 audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
868 break;
869 default:
870 DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
871 info->channels);
872 return -EINVAL;
873 }
874
875 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
876
877 return hdmi_audio_infoframe_config(hdmi);
878 }
879
880 static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
881 {
882 struct sti_hdmi *hdmi = bridge->driver_private;
883
884 DRM_DEBUG_DRIVER("\n");
885
886 if (hdmi->enabled)
887 return;
888
889 /* Prepare/enable clocks */
890 if (clk_prepare_enable(hdmi->clk_pix))
891 DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
892 if (clk_prepare_enable(hdmi->clk_tmds))
893 DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
894 if (clk_prepare_enable(hdmi->clk_phy))
895 DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n");
896
897 hdmi->enabled = true;
898
899 /* Program hdmi serializer and start phy */
900 if (!hdmi->phy_ops->start(hdmi)) {
901 DRM_ERROR("Unable to start hdmi phy\n");
902 return;
903 }
904
905 /* Program hdmi active area */
906 hdmi_active_area(hdmi);
907
908 /* Enable working interrupts */
909 hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
910
911 /* Program hdmi config */
912 hdmi_config(hdmi);
913
914 /* Program AVI infoframe */
915 if (hdmi_avi_infoframe_config(hdmi))
916 DRM_ERROR("Unable to configure AVI infoframe\n");
917
918 if (hdmi->audio.enabled) {
919 if (hdmi_audio_configure(hdmi))
920 DRM_ERROR("Unable to configure audio\n");
921 } else {
922 hdmi_audio_infoframe_config(hdmi);
923 }
924
925 /* Program VS infoframe */
926 if (hdmi_vendor_infoframe_config(hdmi))
927 DRM_ERROR("Unable to configure VS infoframe\n");
928
929 /* Sw reset */
930 hdmi_swreset(hdmi);
931 }
932
933 static void sti_hdmi_set_mode(struct drm_bridge *bridge,
934 struct drm_display_mode *mode,
935 struct drm_display_mode *adjusted_mode)
936 {
937 struct sti_hdmi *hdmi = bridge->driver_private;
938 int ret;
939
940 DRM_DEBUG_DRIVER("\n");
941
942 /* Copy the drm display mode in the connector local structure */
943 memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
944
945 /* Update clock framerate according to the selected mode */
946 ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
947 if (ret < 0) {
948 DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
949 mode->clock * 1000);
950 return;
951 }
952 ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
953 if (ret < 0) {
954 DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
955 mode->clock * 1000);
956 return;
957 }
958 }
959
960 static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
961 {
962 /* do nothing */
963 }
964
965 static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
966 .pre_enable = sti_hdmi_pre_enable,
967 .enable = sti_hdmi_bridge_nope,
968 .disable = sti_hdmi_disable,
969 .post_disable = sti_hdmi_bridge_nope,
970 .mode_set = sti_hdmi_set_mode,
971 };
972
973 static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
974 {
975 struct sti_hdmi_connector *hdmi_connector
976 = to_sti_hdmi_connector(connector);
977 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
978 struct edid *edid;
979 int count;
980
981 DRM_DEBUG_DRIVER("\n");
982
983 edid = drm_get_edid(connector, hdmi->ddc_adapt);
984 if (!edid)
985 goto fail;
986
987 count = drm_add_edid_modes(connector, edid);
988 drm_mode_connector_update_edid_property(connector, edid);
989 drm_edid_to_eld(connector, edid);
990
991 kfree(edid);
992 return count;
993
994 fail:
995 DRM_ERROR("Can't read HDMI EDID\n");
996 return 0;
997 }
998
999 #define CLK_TOLERANCE_HZ 50
1000
1001 static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
1002 struct drm_display_mode *mode)
1003 {
1004 int target = mode->clock * 1000;
1005 int target_min = target - CLK_TOLERANCE_HZ;
1006 int target_max = target + CLK_TOLERANCE_HZ;
1007 int result;
1008 struct sti_hdmi_connector *hdmi_connector
1009 = to_sti_hdmi_connector(connector);
1010 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1011
1012
1013 result = clk_round_rate(hdmi->clk_pix, target);
1014
1015 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
1016 target, result);
1017
1018 if ((result < target_min) || (result > target_max)) {
1019 DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
1020 return MODE_BAD;
1021 }
1022
1023 return MODE_OK;
1024 }
1025
1026 static const
1027 struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
1028 .get_modes = sti_hdmi_connector_get_modes,
1029 .mode_valid = sti_hdmi_connector_mode_valid,
1030 };
1031
1032 /* get detection status of display device */
1033 static enum drm_connector_status
1034 sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
1035 {
1036 struct sti_hdmi_connector *hdmi_connector
1037 = to_sti_hdmi_connector(connector);
1038 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1039
1040 DRM_DEBUG_DRIVER("\n");
1041
1042 if (hdmi->hpd) {
1043 DRM_DEBUG_DRIVER("hdmi cable connected\n");
1044 return connector_status_connected;
1045 }
1046
1047 DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
1048 return connector_status_disconnected;
1049 }
1050
1051 static void sti_hdmi_connector_init_property(struct drm_device *drm_dev,
1052 struct drm_connector *connector)
1053 {
1054 struct sti_hdmi_connector *hdmi_connector
1055 = to_sti_hdmi_connector(connector);
1056 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1057 struct drm_property *prop;
1058
1059 /* colorspace property */
1060 hdmi->colorspace = DEFAULT_COLORSPACE_MODE;
1061 prop = drm_property_create_enum(drm_dev, 0, "colorspace",
1062 colorspace_mode_names,
1063 ARRAY_SIZE(colorspace_mode_names));
1064 if (!prop) {
1065 DRM_ERROR("fails to create colorspace property\n");
1066 return;
1067 }
1068 hdmi_connector->colorspace_property = prop;
1069 drm_object_attach_property(&connector->base, prop, hdmi->colorspace);
1070
1071 /* hdmi_mode property */
1072 hdmi->hdmi_mode = DEFAULT_HDMI_MODE;
1073 prop = drm_property_create_enum(drm_dev, 0, "hdmi_mode",
1074 hdmi_mode_names,
1075 ARRAY_SIZE(hdmi_mode_names));
1076 if (!prop) {
1077 DRM_ERROR("fails to create colorspace property\n");
1078 return;
1079 }
1080 hdmi_connector->hdmi_mode_property = prop;
1081 drm_object_attach_property(&connector->base, prop, hdmi->hdmi_mode);
1082
1083 }
1084
1085 static int
1086 sti_hdmi_connector_set_property(struct drm_connector *connector,
1087 struct drm_connector_state *state,
1088 struct drm_property *property,
1089 uint64_t val)
1090 {
1091 struct sti_hdmi_connector *hdmi_connector
1092 = to_sti_hdmi_connector(connector);
1093 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1094
1095 if (property == hdmi_connector->colorspace_property) {
1096 hdmi->colorspace = val;
1097 return 0;
1098 }
1099
1100 if (property == hdmi_connector->hdmi_mode_property) {
1101 hdmi->hdmi_mode = val;
1102 return 0;
1103 }
1104
1105 DRM_ERROR("failed to set hdmi connector property\n");
1106 return -EINVAL;
1107 }
1108
1109 static int
1110 sti_hdmi_connector_get_property(struct drm_connector *connector,
1111 const struct drm_connector_state *state,
1112 struct drm_property *property,
1113 uint64_t *val)
1114 {
1115 struct sti_hdmi_connector *hdmi_connector
1116 = to_sti_hdmi_connector(connector);
1117 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1118
1119 if (property == hdmi_connector->colorspace_property) {
1120 *val = hdmi->colorspace;
1121 return 0;
1122 }
1123
1124 if (property == hdmi_connector->hdmi_mode_property) {
1125 *val = hdmi->hdmi_mode;
1126 return 0;
1127 }
1128
1129 DRM_ERROR("failed to get hdmi connector property\n");
1130 return -EINVAL;
1131 }
1132
1133 static int sti_hdmi_late_register(struct drm_connector *connector)
1134 {
1135 struct sti_hdmi_connector *hdmi_connector
1136 = to_sti_hdmi_connector(connector);
1137 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1138
1139 if (hdmi_debugfs_init(hdmi, hdmi->drm_dev->primary)) {
1140 DRM_ERROR("HDMI debugfs setup failed\n");
1141 return -EINVAL;
1142 }
1143
1144 return 0;
1145 }
1146
1147 static const struct drm_connector_funcs sti_hdmi_connector_funcs = {
1148 .dpms = drm_atomic_helper_connector_dpms,
1149 .fill_modes = drm_helper_probe_single_connector_modes,
1150 .detect = sti_hdmi_connector_detect,
1151 .destroy = drm_connector_cleanup,
1152 .reset = drm_atomic_helper_connector_reset,
1153 .set_property = drm_atomic_helper_connector_set_property,
1154 .atomic_set_property = sti_hdmi_connector_set_property,
1155 .atomic_get_property = sti_hdmi_connector_get_property,
1156 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1157 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1158 .late_register = sti_hdmi_late_register,
1159 };
1160
1161 static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
1162 {
1163 struct drm_encoder *encoder;
1164
1165 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1166 if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
1167 return encoder;
1168 }
1169
1170 return NULL;
1171 }
1172
1173 static void hdmi_audio_shutdown(struct device *dev, void *data)
1174 {
1175 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1176 int audio_cfg;
1177
1178 DRM_DEBUG_DRIVER("\n");
1179
1180 /* disable audio */
1181 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1182 HDMI_AUD_CFG_ONE_BIT_INVALID;
1183 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1184
1185 hdmi->audio.enabled = false;
1186 hdmi_audio_infoframe_config(hdmi);
1187 }
1188
1189 static int hdmi_audio_hw_params(struct device *dev,
1190 void *data,
1191 struct hdmi_codec_daifmt *daifmt,
1192 struct hdmi_codec_params *params)
1193 {
1194 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1195 int ret;
1196
1197 DRM_DEBUG_DRIVER("\n");
1198
1199 if ((daifmt->fmt != HDMI_I2S) || daifmt->bit_clk_inv ||
1200 daifmt->frame_clk_inv || daifmt->bit_clk_master ||
1201 daifmt->frame_clk_master) {
1202 dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
1203 daifmt->bit_clk_inv, daifmt->frame_clk_inv,
1204 daifmt->bit_clk_master,
1205 daifmt->frame_clk_master);
1206 return -EINVAL;
1207 }
1208
1209 hdmi->audio.sample_width = params->sample_width;
1210 hdmi->audio.sample_rate = params->sample_rate;
1211 hdmi->audio.cea = params->cea;
1212
1213 hdmi->audio.enabled = true;
1214
1215 ret = hdmi_audio_configure(hdmi);
1216 if (ret < 0)
1217 return ret;
1218
1219 return 0;
1220 }
1221
1222 static int hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
1223 {
1224 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1225
1226 DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
1227
1228 if (enable)
1229 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
1230 else
1231 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
1232
1233 return 0;
1234 }
1235
1236 static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1237 {
1238 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1239 struct drm_connector *connector = hdmi->drm_connector;
1240
1241 DRM_DEBUG_DRIVER("\n");
1242 memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
1243
1244 return 0;
1245 }
1246
1247 static const struct hdmi_codec_ops audio_codec_ops = {
1248 .hw_params = hdmi_audio_hw_params,
1249 .audio_shutdown = hdmi_audio_shutdown,
1250 .digital_mute = hdmi_audio_digital_mute,
1251 .get_eld = hdmi_audio_get_eld,
1252 };
1253
1254 static int sti_hdmi_register_audio_driver(struct device *dev,
1255 struct sti_hdmi *hdmi)
1256 {
1257 struct hdmi_codec_pdata codec_data = {
1258 .ops = &audio_codec_ops,
1259 .max_i2s_channels = 8,
1260 .i2s = 1,
1261 };
1262
1263 DRM_DEBUG_DRIVER("\n");
1264
1265 hdmi->audio.enabled = false;
1266
1267 hdmi->audio_pdev = platform_device_register_data(
1268 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
1269 &codec_data, sizeof(codec_data));
1270
1271 if (IS_ERR(hdmi->audio_pdev))
1272 return PTR_ERR(hdmi->audio_pdev);
1273
1274 DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
1275
1276 return 0;
1277 }
1278
1279 static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
1280 {
1281 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1282 struct drm_device *drm_dev = data;
1283 struct drm_encoder *encoder;
1284 struct sti_hdmi_connector *connector;
1285 struct drm_connector *drm_connector;
1286 struct drm_bridge *bridge;
1287 int err;
1288
1289 /* Set the drm device handle */
1290 hdmi->drm_dev = drm_dev;
1291
1292 encoder = sti_hdmi_find_encoder(drm_dev);
1293 if (!encoder)
1294 return -EINVAL;
1295
1296 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
1297 if (!connector)
1298 return -EINVAL;
1299
1300 connector->hdmi = hdmi;
1301
1302 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
1303 if (!bridge)
1304 return -EINVAL;
1305
1306 bridge->driver_private = hdmi;
1307 bridge->funcs = &sti_hdmi_bridge_funcs;
1308 drm_bridge_attach(encoder, bridge, NULL);
1309
1310 connector->encoder = encoder;
1311
1312 drm_connector = (struct drm_connector *)connector;
1313
1314 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
1315
1316 drm_connector_init(drm_dev, drm_connector,
1317 &sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA);
1318 drm_connector_helper_add(drm_connector,
1319 &sti_hdmi_connector_helper_funcs);
1320
1321 /* initialise property */
1322 sti_hdmi_connector_init_property(drm_dev, drm_connector);
1323
1324 hdmi->drm_connector = drm_connector;
1325
1326 err = drm_mode_connector_attach_encoder(drm_connector, encoder);
1327 if (err) {
1328 DRM_ERROR("Failed to attach a connector to a encoder\n");
1329 goto err_sysfs;
1330 }
1331
1332 err = sti_hdmi_register_audio_driver(dev, hdmi);
1333 if (err) {
1334 DRM_ERROR("Failed to attach an audio codec\n");
1335 goto err_sysfs;
1336 }
1337
1338 /* Initialize audio infoframe */
1339 err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
1340 if (err) {
1341 DRM_ERROR("Failed to init audio infoframe\n");
1342 goto err_sysfs;
1343 }
1344
1345 /* Enable default interrupts */
1346 hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
1347
1348 return 0;
1349
1350 err_sysfs:
1351 drm_bridge_remove(bridge);
1352 hdmi->drm_connector = NULL;
1353 return -EINVAL;
1354 }
1355
1356 static void sti_hdmi_unbind(struct device *dev,
1357 struct device *master, void *data)
1358 {
1359 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1360 struct drm_device *drm_dev = data;
1361
1362 hdmi_debugfs_exit(hdmi, drm_dev->primary);
1363 }
1364
1365 static const struct component_ops sti_hdmi_ops = {
1366 .bind = sti_hdmi_bind,
1367 .unbind = sti_hdmi_unbind,
1368 };
1369
1370 static const struct of_device_id hdmi_of_match[] = {
1371 {
1372 .compatible = "st,stih407-hdmi",
1373 .data = &tx3g4c28phy_ops,
1374 }, {
1375 /* end node */
1376 }
1377 };
1378 MODULE_DEVICE_TABLE(of, hdmi_of_match);
1379
1380 static int sti_hdmi_probe(struct platform_device *pdev)
1381 {
1382 struct device *dev = &pdev->dev;
1383 struct sti_hdmi *hdmi;
1384 struct device_node *np = dev->of_node;
1385 struct resource *res;
1386 struct device_node *ddc;
1387 int ret;
1388
1389 DRM_INFO("%s\n", __func__);
1390
1391 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1392 if (!hdmi)
1393 return -ENOMEM;
1394
1395 ddc = of_parse_phandle(pdev->dev.of_node, "ddc", 0);
1396 if (ddc) {
1397 hdmi->ddc_adapt = of_get_i2c_adapter_by_node(ddc);
1398 of_node_put(ddc);
1399 if (!hdmi->ddc_adapt)
1400 return -EPROBE_DEFER;
1401 }
1402
1403 hdmi->dev = pdev->dev;
1404
1405 /* Get resources */
1406 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
1407 if (!res) {
1408 DRM_ERROR("Invalid hdmi resource\n");
1409 ret = -ENOMEM;
1410 goto release_adapter;
1411 }
1412 hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
1413 if (!hdmi->regs) {
1414 ret = -ENOMEM;
1415 goto release_adapter;
1416 }
1417
1418 hdmi->phy_ops = (struct hdmi_phy_ops *)
1419 of_match_node(hdmi_of_match, np)->data;
1420
1421 /* Get clock resources */
1422 hdmi->clk_pix = devm_clk_get(dev, "pix");
1423 if (IS_ERR(hdmi->clk_pix)) {
1424 DRM_ERROR("Cannot get hdmi_pix clock\n");
1425 ret = PTR_ERR(hdmi->clk_pix);
1426 goto release_adapter;
1427 }
1428
1429 hdmi->clk_tmds = devm_clk_get(dev, "tmds");
1430 if (IS_ERR(hdmi->clk_tmds)) {
1431 DRM_ERROR("Cannot get hdmi_tmds clock\n");
1432 ret = PTR_ERR(hdmi->clk_tmds);
1433 goto release_adapter;
1434 }
1435
1436 hdmi->clk_phy = devm_clk_get(dev, "phy");
1437 if (IS_ERR(hdmi->clk_phy)) {
1438 DRM_ERROR("Cannot get hdmi_phy clock\n");
1439 ret = PTR_ERR(hdmi->clk_phy);
1440 goto release_adapter;
1441 }
1442
1443 hdmi->clk_audio = devm_clk_get(dev, "audio");
1444 if (IS_ERR(hdmi->clk_audio)) {
1445 DRM_ERROR("Cannot get hdmi_audio clock\n");
1446 ret = PTR_ERR(hdmi->clk_audio);
1447 goto release_adapter;
1448 }
1449
1450 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
1451
1452 init_waitqueue_head(&hdmi->wait_event);
1453
1454 hdmi->irq = platform_get_irq_byname(pdev, "irq");
1455
1456 ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
1457 hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
1458 if (ret) {
1459 DRM_ERROR("Failed to register HDMI interrupt\n");
1460 goto release_adapter;
1461 }
1462
1463 hdmi->reset = devm_reset_control_get(dev, "hdmi");
1464 /* Take hdmi out of reset */
1465 if (!IS_ERR(hdmi->reset))
1466 reset_control_deassert(hdmi->reset);
1467
1468 platform_set_drvdata(pdev, hdmi);
1469
1470 return component_add(&pdev->dev, &sti_hdmi_ops);
1471
1472 release_adapter:
1473 i2c_put_adapter(hdmi->ddc_adapt);
1474
1475 return ret;
1476 }
1477
1478 static int sti_hdmi_remove(struct platform_device *pdev)
1479 {
1480 struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
1481
1482 i2c_put_adapter(hdmi->ddc_adapt);
1483 if (hdmi->audio_pdev)
1484 platform_device_unregister(hdmi->audio_pdev);
1485 component_del(&pdev->dev, &sti_hdmi_ops);
1486
1487 return 0;
1488 }
1489
1490 struct platform_driver sti_hdmi_driver = {
1491 .driver = {
1492 .name = "sti-hdmi",
1493 .owner = THIS_MODULE,
1494 .of_match_table = hdmi_of_match,
1495 },
1496 .probe = sti_hdmi_probe,
1497 .remove = sti_hdmi_remove,
1498 };
1499
1500 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
1501 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
1502 MODULE_LICENSE("GPL");
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