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Merge branch 'nvmf-4.8-rc' of git://git.infradead.org/nvme-fabrics into for-linus
[deliverable/linux.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_hdmi_tx3g0c55phy.h"
26 #include "sti_vtg.h"
27
28 #define HDMI_CFG 0x0000
29 #define HDMI_INT_EN 0x0004
30 #define HDMI_INT_STA 0x0008
31 #define HDMI_INT_CLR 0x000C
32 #define HDMI_STA 0x0010
33 #define HDMI_ACTIVE_VID_XMIN 0x0100
34 #define HDMI_ACTIVE_VID_XMAX 0x0104
35 #define HDMI_ACTIVE_VID_YMIN 0x0108
36 #define HDMI_ACTIVE_VID_YMAX 0x010C
37 #define HDMI_DFLT_CHL0_DAT 0x0110
38 #define HDMI_DFLT_CHL1_DAT 0x0114
39 #define HDMI_DFLT_CHL2_DAT 0x0118
40 #define HDMI_AUDIO_CFG 0x0200
41 #define HDMI_SPDIF_FIFO_STATUS 0x0204
42 #define HDMI_SW_DI_1_HEAD_WORD 0x0210
43 #define HDMI_SW_DI_1_PKT_WORD0 0x0214
44 #define HDMI_SW_DI_1_PKT_WORD1 0x0218
45 #define HDMI_SW_DI_1_PKT_WORD2 0x021C
46 #define HDMI_SW_DI_1_PKT_WORD3 0x0220
47 #define HDMI_SW_DI_1_PKT_WORD4 0x0224
48 #define HDMI_SW_DI_1_PKT_WORD5 0x0228
49 #define HDMI_SW_DI_1_PKT_WORD6 0x022C
50 #define HDMI_SW_DI_CFG 0x0230
51 #define HDMI_SAMPLE_FLAT_MASK 0x0244
52 #define HDMI_AUDN 0x0400
53 #define HDMI_AUD_CTS 0x0404
54 #define HDMI_SW_DI_2_HEAD_WORD 0x0600
55 #define HDMI_SW_DI_2_PKT_WORD0 0x0604
56 #define HDMI_SW_DI_2_PKT_WORD1 0x0608
57 #define HDMI_SW_DI_2_PKT_WORD2 0x060C
58 #define HDMI_SW_DI_2_PKT_WORD3 0x0610
59 #define HDMI_SW_DI_2_PKT_WORD4 0x0614
60 #define HDMI_SW_DI_2_PKT_WORD5 0x0618
61 #define HDMI_SW_DI_2_PKT_WORD6 0x061C
62 #define HDMI_SW_DI_3_HEAD_WORD 0x0620
63 #define HDMI_SW_DI_3_PKT_WORD0 0x0624
64 #define HDMI_SW_DI_3_PKT_WORD1 0x0628
65 #define HDMI_SW_DI_3_PKT_WORD2 0x062C
66 #define HDMI_SW_DI_3_PKT_WORD3 0x0630
67 #define HDMI_SW_DI_3_PKT_WORD4 0x0634
68 #define HDMI_SW_DI_3_PKT_WORD5 0x0638
69 #define HDMI_SW_DI_3_PKT_WORD6 0x063C
70
71 #define HDMI_IFRAME_SLOT_AVI 1
72 #define HDMI_IFRAME_SLOT_AUDIO 2
73 #define HDMI_IFRAME_SLOT_VENDOR 3
74
75 #define XCAT(prefix, x, suffix) prefix ## x ## suffix
76 #define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
77 #define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0)
78 #define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1)
79 #define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2)
80 #define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3)
81 #define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4)
82 #define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
83 #define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
84
85 #define HDMI_SW_DI_MAX_WORD 7
86
87 #define HDMI_IFRAME_DISABLED 0x0
88 #define HDMI_IFRAME_SINGLE_SHOT 0x1
89 #define HDMI_IFRAME_FIELD 0x2
90 #define HDMI_IFRAME_FRAME 0x3
91 #define HDMI_IFRAME_MASK 0x3
92 #define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */
93
94 #define HDMI_CFG_DEVICE_EN BIT(0)
95 #define HDMI_CFG_HDMI_NOT_DVI BIT(1)
96 #define HDMI_CFG_HDCP_EN BIT(2)
97 #define HDMI_CFG_ESS_NOT_OESS BIT(3)
98 #define HDMI_CFG_H_SYNC_POL_NEG BIT(4)
99 #define HDMI_CFG_SINK_TERM_DET_EN BIT(5)
100 #define HDMI_CFG_V_SYNC_POL_NEG BIT(6)
101 #define HDMI_CFG_422_EN BIT(8)
102 #define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12)
103 #define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13)
104 #define HDMI_CFG_SW_RST_EN BIT(31)
105
106 #define HDMI_INT_GLOBAL BIT(0)
107 #define HDMI_INT_SW_RST BIT(1)
108 #define HDMI_INT_PIX_CAP BIT(3)
109 #define HDMI_INT_HOT_PLUG BIT(4)
110 #define HDMI_INT_DLL_LCK BIT(5)
111 #define HDMI_INT_NEW_FRAME BIT(6)
112 #define HDMI_INT_GENCTRL_PKT BIT(7)
113 #define HDMI_INT_AUDIO_FIFO_XRUN BIT(8)
114 #define HDMI_INT_SINK_TERM_PRESENT BIT(11)
115
116 #define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
117 | HDMI_INT_DLL_LCK \
118 | HDMI_INT_HOT_PLUG \
119 | HDMI_INT_GLOBAL)
120
121 #define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
122 | HDMI_INT_AUDIO_FIFO_XRUN \
123 | HDMI_INT_GENCTRL_PKT \
124 | HDMI_INT_NEW_FRAME \
125 | HDMI_INT_DLL_LCK \
126 | HDMI_INT_HOT_PLUG \
127 | HDMI_INT_PIX_CAP \
128 | HDMI_INT_SW_RST \
129 | HDMI_INT_GLOBAL)
130
131 #define HDMI_STA_SW_RST BIT(1)
132
133 #define HDMI_AUD_CFG_8CH BIT(0)
134 #define HDMI_AUD_CFG_SPDIF_DIV_2 BIT(1)
135 #define HDMI_AUD_CFG_SPDIF_DIV_3 BIT(2)
136 #define HDMI_AUD_CFG_SPDIF_CLK_DIV_4 (BIT(1) | BIT(2))
137 #define HDMI_AUD_CFG_CTS_CLK_256FS BIT(12)
138 #define HDMI_AUD_CFG_DTS_INVALID BIT(16)
139 #define HDMI_AUD_CFG_ONE_BIT_INVALID (BIT(18) | BIT(19) | BIT(20) | BIT(21))
140 #define HDMI_AUD_CFG_CH12_VALID BIT(28)
141 #define HDMI_AUD_CFG_CH34_VALID BIT(29)
142 #define HDMI_AUD_CFG_CH56_VALID BIT(30)
143 #define HDMI_AUD_CFG_CH78_VALID BIT(31)
144
145 /* sample flat mask */
146 #define HDMI_SAMPLE_FLAT_NO 0
147 #define HDMI_SAMPLE_FLAT_SP0 BIT(0)
148 #define HDMI_SAMPLE_FLAT_SP1 BIT(1)
149 #define HDMI_SAMPLE_FLAT_SP2 BIT(2)
150 #define HDMI_SAMPLE_FLAT_SP3 BIT(3)
151 #define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\
152 HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3)
153
154 #define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0)
155 #define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8)
156 #define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16)
157
158 struct sti_hdmi_connector {
159 struct drm_connector drm_connector;
160 struct drm_encoder *encoder;
161 struct sti_hdmi *hdmi;
162 struct drm_property *colorspace_property;
163 struct drm_property *hdmi_mode_property;
164 };
165
166 #define to_sti_hdmi_connector(x) \
167 container_of(x, struct sti_hdmi_connector, drm_connector)
168
169 u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
170 {
171 return readl(hdmi->regs + offset);
172 }
173
174 void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset)
175 {
176 writel(val, hdmi->regs + offset);
177 }
178
179 /**
180 * HDMI interrupt handler threaded
181 *
182 * @irq: irq number
183 * @arg: connector structure
184 */
185 static irqreturn_t hdmi_irq_thread(int irq, void *arg)
186 {
187 struct sti_hdmi *hdmi = arg;
188
189 /* Hot plug/unplug IRQ */
190 if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
191 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
192 if (hdmi->drm_dev)
193 drm_helper_hpd_irq_event(hdmi->drm_dev);
194 }
195
196 /* Sw reset and PLL lock are exclusive so we can use the same
197 * event to signal them
198 */
199 if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) {
200 hdmi->event_received = true;
201 wake_up_interruptible(&hdmi->wait_event);
202 }
203
204 /* Audio FIFO underrun IRQ */
205 if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN)
206 DRM_INFO("Warning: audio FIFO underrun occurs!");
207
208 return IRQ_HANDLED;
209 }
210
211 /**
212 * HDMI interrupt handler
213 *
214 * @irq: irq number
215 * @arg: connector structure
216 */
217 static irqreturn_t hdmi_irq(int irq, void *arg)
218 {
219 struct sti_hdmi *hdmi = arg;
220
221 /* read interrupt status */
222 hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA);
223
224 /* clear interrupt status */
225 hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR);
226
227 /* force sync bus write */
228 hdmi_read(hdmi, HDMI_INT_STA);
229
230 return IRQ_WAKE_THREAD;
231 }
232
233 /**
234 * Set hdmi active area depending on the drm display mode selected
235 *
236 * @hdmi: pointer on the hdmi internal structure
237 */
238 static void hdmi_active_area(struct sti_hdmi *hdmi)
239 {
240 u32 xmin, xmax;
241 u32 ymin, ymax;
242
243 xmin = sti_vtg_get_pixel_number(hdmi->mode, 1);
244 xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay);
245 ymin = sti_vtg_get_line_number(hdmi->mode, 0);
246 ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1);
247
248 hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN);
249 hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX);
250 hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN);
251 hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX);
252 }
253
254 /**
255 * Overall hdmi configuration
256 *
257 * @hdmi: pointer on the hdmi internal structure
258 */
259 static void hdmi_config(struct sti_hdmi *hdmi)
260 {
261 u32 conf;
262
263 DRM_DEBUG_DRIVER("\n");
264
265 /* Clear overrun and underrun fifo */
266 conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR;
267
268 /* Select encryption type and the framing mode */
269 conf |= HDMI_CFG_ESS_NOT_OESS;
270 if (hdmi->hdmi_mode == HDMI_MODE_HDMI)
271 conf |= HDMI_CFG_HDMI_NOT_DVI;
272
273 /* Enable sink term detection */
274 conf |= HDMI_CFG_SINK_TERM_DET_EN;
275
276 /* Set Hsync polarity */
277 if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) {
278 DRM_DEBUG_DRIVER("H Sync Negative\n");
279 conf |= HDMI_CFG_H_SYNC_POL_NEG;
280 }
281
282 /* Set Vsync polarity */
283 if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) {
284 DRM_DEBUG_DRIVER("V Sync Negative\n");
285 conf |= HDMI_CFG_V_SYNC_POL_NEG;
286 }
287
288 /* Enable HDMI */
289 conf |= HDMI_CFG_DEVICE_EN;
290
291 hdmi_write(hdmi, conf, HDMI_CFG);
292 }
293
294 /*
295 * Helper to reset info frame
296 *
297 * @hdmi: pointer on the hdmi internal structure
298 * @slot: infoframe to reset
299 */
300 static void hdmi_infoframe_reset(struct sti_hdmi *hdmi,
301 u32 slot)
302 {
303 u32 val, i;
304 u32 head_offset, pack_offset;
305
306 switch (slot) {
307 case HDMI_IFRAME_SLOT_AVI:
308 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
309 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
310 break;
311 case HDMI_IFRAME_SLOT_AUDIO:
312 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
313 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
314 break;
315 case HDMI_IFRAME_SLOT_VENDOR:
316 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
317 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
318 break;
319 default:
320 DRM_ERROR("unsupported infoframe slot: %#x\n", slot);
321 return;
322 }
323
324 /* Disable transmission for the selected slot */
325 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
326 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
327 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
328
329 /* Reset info frame registers */
330 hdmi_write(hdmi, 0x0, head_offset);
331 for (i = 0; i < HDMI_SW_DI_MAX_WORD; i += sizeof(u32))
332 hdmi_write(hdmi, 0x0, pack_offset + i);
333 }
334
335 /**
336 * Helper to concatenate infoframe in 32 bits word
337 *
338 * @ptr: pointer on the hdmi internal structure
339 * @data: infoframe to write
340 * @size: size to write
341 */
342 static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size)
343 {
344 unsigned long value = 0;
345 size_t i;
346
347 for (i = size; i > 0; i--)
348 value = (value << 8) | ptr[i - 1];
349
350 return value;
351 }
352
353 /**
354 * Helper to write info frame
355 *
356 * @hdmi: pointer on the hdmi internal structure
357 * @data: infoframe to write
358 * @size: size to write
359 */
360 static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi,
361 const u8 *data,
362 size_t size)
363 {
364 const u8 *ptr = data;
365 u32 val, slot, mode, i;
366 u32 head_offset, pack_offset;
367
368 switch (*ptr) {
369 case HDMI_INFOFRAME_TYPE_AVI:
370 slot = HDMI_IFRAME_SLOT_AVI;
371 mode = HDMI_IFRAME_FIELD;
372 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
373 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
374 break;
375 case HDMI_INFOFRAME_TYPE_AUDIO:
376 slot = HDMI_IFRAME_SLOT_AUDIO;
377 mode = HDMI_IFRAME_FRAME;
378 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
379 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
380 break;
381 case HDMI_INFOFRAME_TYPE_VENDOR:
382 slot = HDMI_IFRAME_SLOT_VENDOR;
383 mode = HDMI_IFRAME_FRAME;
384 head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
385 pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
386 break;
387 default:
388 DRM_ERROR("unsupported infoframe type: %#x\n", *ptr);
389 return;
390 }
391
392 /* Disable transmission slot for updated infoframe */
393 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
394 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
395 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
396
397 val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++);
398 val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++);
399 val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++);
400 writel(val, hdmi->regs + head_offset);
401
402 /*
403 * Each subpack contains 4 bytes
404 * The First Bytes of the first subpacket must contain the checksum
405 * Packet size is increase by one.
406 */
407 size = size - HDMI_INFOFRAME_HEADER_SIZE + 1;
408 for (i = 0; i < size; i += sizeof(u32)) {
409 size_t num;
410
411 num = min_t(size_t, size - i, sizeof(u32));
412 val = hdmi_infoframe_subpack(ptr, num);
413 ptr += sizeof(u32);
414 writel(val, hdmi->regs + pack_offset + i);
415 }
416
417 /* Enable transmission slot for updated infoframe */
418 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
419 val |= HDMI_IFRAME_CFG_DI_N(mode, slot);
420 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
421 }
422
423 /**
424 * Prepare and configure the AVI infoframe
425 *
426 * AVI infoframe are transmitted at least once per two video field and
427 * contains information about HDMI transmission mode such as color space,
428 * colorimetry, ...
429 *
430 * @hdmi: pointer on the hdmi internal structure
431 *
432 * Return negative value if error occurs
433 */
434 static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
435 {
436 struct drm_display_mode *mode = &hdmi->mode;
437 struct hdmi_avi_infoframe infoframe;
438 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
439 int ret;
440
441 DRM_DEBUG_DRIVER("\n");
442
443 ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, mode);
444 if (ret < 0) {
445 DRM_ERROR("failed to setup AVI infoframe: %d\n", ret);
446 return ret;
447 }
448
449 /* fixed infoframe configuration not linked to the mode */
450 infoframe.colorspace = hdmi->colorspace;
451 infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
452 infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
453
454 ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
455 if (ret < 0) {
456 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
457 return ret;
458 }
459
460 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
461
462 return 0;
463 }
464
465 /**
466 * Prepare and configure the AUDIO infoframe
467 *
468 * AUDIO infoframe are transmitted once per frame and
469 * contains information about HDMI transmission mode such as audio codec,
470 * sample size, ...
471 *
472 * @hdmi: pointer on the hdmi internal structure
473 *
474 * Return negative value if error occurs
475 */
476 static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
477 {
478 struct hdmi_audio_params *audio = &hdmi->audio;
479 u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
480 int ret, val;
481
482 DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__,
483 audio->enabled ? "enable" : "disable");
484 if (audio->enabled) {
485 /* set audio parameters stored*/
486 ret = hdmi_audio_infoframe_pack(&audio->cea, buffer,
487 sizeof(buffer));
488 if (ret < 0) {
489 DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
490 return ret;
491 }
492 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
493 } else {
494 /*disable audio info frame transmission */
495 val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
496 val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK,
497 HDMI_IFRAME_SLOT_AUDIO);
498 hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
499 }
500
501 return 0;
502 }
503
504 /*
505 * Prepare and configure the VS infoframe
506 *
507 * Vendor Specific infoframe are transmitted once per frame and
508 * contains vendor specific information.
509 *
510 * @hdmi: pointer on the hdmi internal structure
511 *
512 * Return negative value if error occurs
513 */
514 #define HDMI_VENDOR_INFOFRAME_MAX_SIZE 6
515 static int hdmi_vendor_infoframe_config(struct sti_hdmi *hdmi)
516 {
517 struct drm_display_mode *mode = &hdmi->mode;
518 struct hdmi_vendor_infoframe infoframe;
519 u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_VENDOR_INFOFRAME_MAX_SIZE];
520 int ret;
521
522 DRM_DEBUG_DRIVER("\n");
523
524 ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe, mode);
525 if (ret < 0) {
526 /*
527 * Going into that statement does not means vendor infoframe
528 * fails. It just informed us that vendor infoframe is not
529 * needed for the selected mode. Only 4k or stereoscopic 3D
530 * mode requires vendor infoframe. So just simply return 0.
531 */
532 return 0;
533 }
534
535 ret = hdmi_vendor_infoframe_pack(&infoframe, buffer, sizeof(buffer));
536 if (ret < 0) {
537 DRM_ERROR("failed to pack VS infoframe: %d\n", ret);
538 return ret;
539 }
540
541 hdmi_infoframe_write_infopack(hdmi, buffer, ret);
542
543 return 0;
544 }
545
546 /**
547 * Software reset of the hdmi subsystem
548 *
549 * @hdmi: pointer on the hdmi internal structure
550 *
551 */
552 #define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */
553 static void hdmi_swreset(struct sti_hdmi *hdmi)
554 {
555 u32 val;
556
557 DRM_DEBUG_DRIVER("\n");
558
559 /* Enable hdmi_audio clock only during hdmi reset */
560 if (clk_prepare_enable(hdmi->clk_audio))
561 DRM_INFO("Failed to prepare/enable hdmi_audio clk\n");
562
563 /* Sw reset */
564 hdmi->event_received = false;
565
566 val = hdmi_read(hdmi, HDMI_CFG);
567 val |= HDMI_CFG_SW_RST_EN;
568 hdmi_write(hdmi, val, HDMI_CFG);
569
570 /* Wait reset completed */
571 wait_event_interruptible_timeout(hdmi->wait_event,
572 hdmi->event_received == true,
573 msecs_to_jiffies
574 (HDMI_TIMEOUT_SWRESET));
575
576 /*
577 * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is
578 * set to '1' and clk_audio is running.
579 */
580 if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0)
581 DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n");
582
583 val = hdmi_read(hdmi, HDMI_CFG);
584 val &= ~HDMI_CFG_SW_RST_EN;
585 hdmi_write(hdmi, val, HDMI_CFG);
586
587 /* Disable hdmi_audio clock. Not used anymore for drm purpose */
588 clk_disable_unprepare(hdmi->clk_audio);
589 }
590
591 #define DBGFS_PRINT_STR(str1, str2) seq_printf(s, "%-24s %s\n", str1, str2)
592 #define DBGFS_PRINT_INT(str1, int2) seq_printf(s, "%-24s %d\n", str1, int2)
593 #define DBGFS_DUMP(str, reg) seq_printf(s, "%s %-25s 0x%08X", str, #reg, \
594 hdmi_read(hdmi, reg))
595 #define DBGFS_DUMP_DI(reg, slot) DBGFS_DUMP("\n", reg(slot))
596
597 static void hdmi_dbg_cfg(struct seq_file *s, int val)
598 {
599 int tmp;
600
601 seq_puts(s, "\t");
602 tmp = val & HDMI_CFG_HDMI_NOT_DVI;
603 DBGFS_PRINT_STR("mode:", tmp ? "HDMI" : "DVI");
604 seq_puts(s, "\t\t\t\t\t");
605 tmp = val & HDMI_CFG_HDCP_EN;
606 DBGFS_PRINT_STR("HDCP:", tmp ? "enable" : "disable");
607 seq_puts(s, "\t\t\t\t\t");
608 tmp = val & HDMI_CFG_ESS_NOT_OESS;
609 DBGFS_PRINT_STR("HDCP mode:", tmp ? "ESS enable" : "OESS enable");
610 seq_puts(s, "\t\t\t\t\t");
611 tmp = val & HDMI_CFG_SINK_TERM_DET_EN;
612 DBGFS_PRINT_STR("Sink term detection:", tmp ? "enable" : "disable");
613 seq_puts(s, "\t\t\t\t\t");
614 tmp = val & HDMI_CFG_H_SYNC_POL_NEG;
615 DBGFS_PRINT_STR("Hsync polarity:", tmp ? "inverted" : "normal");
616 seq_puts(s, "\t\t\t\t\t");
617 tmp = val & HDMI_CFG_V_SYNC_POL_NEG;
618 DBGFS_PRINT_STR("Vsync polarity:", tmp ? "inverted" : "normal");
619 seq_puts(s, "\t\t\t\t\t");
620 tmp = val & HDMI_CFG_422_EN;
621 DBGFS_PRINT_STR("YUV422 format:", tmp ? "enable" : "disable");
622 }
623
624 static void hdmi_dbg_sta(struct seq_file *s, int val)
625 {
626 int tmp;
627
628 seq_puts(s, "\t");
629 tmp = (val & HDMI_STA_DLL_LCK);
630 DBGFS_PRINT_STR("pll:", tmp ? "locked" : "not locked");
631 seq_puts(s, "\t\t\t\t\t");
632 tmp = (val & HDMI_STA_HOT_PLUG);
633 DBGFS_PRINT_STR("hdmi cable:", tmp ? "connected" : "not connected");
634 }
635
636 static void hdmi_dbg_sw_di_cfg(struct seq_file *s, int val)
637 {
638 int tmp;
639 char *const en_di[] = {"no transmission",
640 "single transmission",
641 "once every field",
642 "once every frame"};
643
644 seq_puts(s, "\t");
645 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 1));
646 DBGFS_PRINT_STR("Data island 1:", en_di[tmp]);
647 seq_puts(s, "\t\t\t\t\t");
648 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 2)) >> 4;
649 DBGFS_PRINT_STR("Data island 2:", en_di[tmp]);
650 seq_puts(s, "\t\t\t\t\t");
651 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 3)) >> 8;
652 DBGFS_PRINT_STR("Data island 3:", en_di[tmp]);
653 seq_puts(s, "\t\t\t\t\t");
654 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 4)) >> 12;
655 DBGFS_PRINT_STR("Data island 4:", en_di[tmp]);
656 seq_puts(s, "\t\t\t\t\t");
657 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 5)) >> 16;
658 DBGFS_PRINT_STR("Data island 5:", en_di[tmp]);
659 seq_puts(s, "\t\t\t\t\t");
660 tmp = (val & HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, 6)) >> 20;
661 DBGFS_PRINT_STR("Data island 6:", en_di[tmp]);
662 }
663
664 static int hdmi_dbg_show(struct seq_file *s, void *data)
665 {
666 struct drm_info_node *node = s->private;
667 struct sti_hdmi *hdmi = (struct sti_hdmi *)node->info_ent->data;
668
669 seq_printf(s, "HDMI: (vaddr = 0x%p)", hdmi->regs);
670 DBGFS_DUMP("\n", HDMI_CFG);
671 hdmi_dbg_cfg(s, hdmi_read(hdmi, HDMI_CFG));
672 DBGFS_DUMP("", HDMI_INT_EN);
673 DBGFS_DUMP("\n", HDMI_STA);
674 hdmi_dbg_sta(s, hdmi_read(hdmi, HDMI_STA));
675 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMIN);
676 seq_puts(s, "\t");
677 DBGFS_PRINT_INT("Xmin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMIN));
678 DBGFS_DUMP("", HDMI_ACTIVE_VID_XMAX);
679 seq_puts(s, "\t");
680 DBGFS_PRINT_INT("Xmax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_XMAX));
681 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMIN);
682 seq_puts(s, "\t");
683 DBGFS_PRINT_INT("Ymin:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMIN));
684 DBGFS_DUMP("", HDMI_ACTIVE_VID_YMAX);
685 seq_puts(s, "\t");
686 DBGFS_PRINT_INT("Ymax:", hdmi_read(hdmi, HDMI_ACTIVE_VID_YMAX));
687 DBGFS_DUMP("", HDMI_SW_DI_CFG);
688 hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG));
689
690 DBGFS_DUMP("\n", HDMI_AUDIO_CFG);
691 DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS);
692 DBGFS_DUMP("\n", HDMI_AUDN);
693
694 seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):",
695 HDMI_IFRAME_SLOT_AVI);
696 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI);
697 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AVI);
698 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AVI);
699 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AVI);
700 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AVI);
701 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AVI);
702 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AVI);
703 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AVI);
704 seq_puts(s, "\n");
705 seq_printf(s, "\n AUDIO Infoframe (Data Island slot N=%d):",
706 HDMI_IFRAME_SLOT_AUDIO);
707 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AUDIO);
708 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_AUDIO);
709 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_AUDIO);
710 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_AUDIO);
711 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_AUDIO);
712 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_AUDIO);
713 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_AUDIO);
714 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_AUDIO);
715 seq_puts(s, "\n");
716 seq_printf(s, "\n VENDOR SPECIFIC Infoframe (Data Island slot N=%d):",
717 HDMI_IFRAME_SLOT_VENDOR);
718 DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_VENDOR);
719 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD0, HDMI_IFRAME_SLOT_VENDOR);
720 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD1, HDMI_IFRAME_SLOT_VENDOR);
721 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD2, HDMI_IFRAME_SLOT_VENDOR);
722 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD3, HDMI_IFRAME_SLOT_VENDOR);
723 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD4, HDMI_IFRAME_SLOT_VENDOR);
724 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD5, HDMI_IFRAME_SLOT_VENDOR);
725 DBGFS_DUMP_DI(HDMI_SW_DI_N_PKT_WORD6, HDMI_IFRAME_SLOT_VENDOR);
726 seq_puts(s, "\n");
727
728 return 0;
729 }
730
731 static struct drm_info_list hdmi_debugfs_files[] = {
732 { "hdmi", hdmi_dbg_show, 0, NULL },
733 };
734
735 static void hdmi_debugfs_exit(struct sti_hdmi *hdmi, struct drm_minor *minor)
736 {
737 drm_debugfs_remove_files(hdmi_debugfs_files,
738 ARRAY_SIZE(hdmi_debugfs_files),
739 minor);
740 }
741
742 static int hdmi_debugfs_init(struct sti_hdmi *hdmi, struct drm_minor *minor)
743 {
744 unsigned int i;
745
746 for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_files); i++)
747 hdmi_debugfs_files[i].data = hdmi;
748
749 return drm_debugfs_create_files(hdmi_debugfs_files,
750 ARRAY_SIZE(hdmi_debugfs_files),
751 minor->debugfs_root, minor);
752 }
753
754 static void sti_hdmi_disable(struct drm_bridge *bridge)
755 {
756 struct sti_hdmi *hdmi = bridge->driver_private;
757
758 u32 val = hdmi_read(hdmi, HDMI_CFG);
759
760 if (!hdmi->enabled)
761 return;
762
763 DRM_DEBUG_DRIVER("\n");
764
765 /* Disable HDMI */
766 val &= ~HDMI_CFG_DEVICE_EN;
767 hdmi_write(hdmi, val, HDMI_CFG);
768
769 hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR);
770
771 /* Stop the phy */
772 hdmi->phy_ops->stop(hdmi);
773
774 /* Reset info frame transmission */
775 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI);
776 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO);
777 hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_VENDOR);
778
779 /* Set the default channel data to be a dark red */
780 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
781 hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);
782 hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT);
783
784 /* Disable/unprepare hdmi clock */
785 clk_disable_unprepare(hdmi->clk_phy);
786 clk_disable_unprepare(hdmi->clk_tmds);
787 clk_disable_unprepare(hdmi->clk_pix);
788
789 hdmi->enabled = false;
790 }
791
792 static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
793 {
794 struct sti_hdmi *hdmi = bridge->driver_private;
795
796 DRM_DEBUG_DRIVER("\n");
797
798 if (hdmi->enabled)
799 return;
800
801 /* Prepare/enable clocks */
802 if (clk_prepare_enable(hdmi->clk_pix))
803 DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
804 if (clk_prepare_enable(hdmi->clk_tmds))
805 DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
806 if (clk_prepare_enable(hdmi->clk_phy))
807 DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n");
808
809 hdmi->enabled = true;
810
811 /* Program hdmi serializer and start phy */
812 if (!hdmi->phy_ops->start(hdmi)) {
813 DRM_ERROR("Unable to start hdmi phy\n");
814 return;
815 }
816
817 /* Program hdmi active area */
818 hdmi_active_area(hdmi);
819
820 /* Enable working interrupts */
821 hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
822
823 /* Program hdmi config */
824 hdmi_config(hdmi);
825
826 /* Program AVI infoframe */
827 if (hdmi_avi_infoframe_config(hdmi))
828 DRM_ERROR("Unable to configure AVI infoframe\n");
829
830 /* Program AUDIO infoframe */
831 if (hdmi_audio_infoframe_config(hdmi))
832 DRM_ERROR("Unable to configure AUDIO infoframe\n");
833
834 /* Program VS infoframe */
835 if (hdmi_vendor_infoframe_config(hdmi))
836 DRM_ERROR("Unable to configure VS infoframe\n");
837
838 /* Sw reset */
839 hdmi_swreset(hdmi);
840 }
841
842 static void sti_hdmi_set_mode(struct drm_bridge *bridge,
843 struct drm_display_mode *mode,
844 struct drm_display_mode *adjusted_mode)
845 {
846 struct sti_hdmi *hdmi = bridge->driver_private;
847 int ret;
848
849 DRM_DEBUG_DRIVER("\n");
850
851 /* Copy the drm display mode in the connector local structure */
852 memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
853
854 /* Update clock framerate according to the selected mode */
855 ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
856 if (ret < 0) {
857 DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
858 mode->clock * 1000);
859 return;
860 }
861 ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
862 if (ret < 0) {
863 DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
864 mode->clock * 1000);
865 return;
866 }
867 }
868
869 static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
870 {
871 /* do nothing */
872 }
873
874 static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
875 .pre_enable = sti_hdmi_pre_enable,
876 .enable = sti_hdmi_bridge_nope,
877 .disable = sti_hdmi_disable,
878 .post_disable = sti_hdmi_bridge_nope,
879 .mode_set = sti_hdmi_set_mode,
880 };
881
882 static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
883 {
884 struct sti_hdmi_connector *hdmi_connector
885 = to_sti_hdmi_connector(connector);
886 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
887 struct edid *edid;
888 int count;
889
890 DRM_DEBUG_DRIVER("\n");
891
892 edid = drm_get_edid(connector, hdmi->ddc_adapt);
893 if (!edid)
894 goto fail;
895
896 count = drm_add_edid_modes(connector, edid);
897 drm_mode_connector_update_edid_property(connector, edid);
898 drm_edid_to_eld(connector, edid);
899
900 kfree(edid);
901 return count;
902
903 fail:
904 DRM_ERROR("Can't read HDMI EDID\n");
905 return 0;
906 }
907
908 #define CLK_TOLERANCE_HZ 50
909
910 static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
911 struct drm_display_mode *mode)
912 {
913 int target = mode->clock * 1000;
914 int target_min = target - CLK_TOLERANCE_HZ;
915 int target_max = target + CLK_TOLERANCE_HZ;
916 int result;
917 struct sti_hdmi_connector *hdmi_connector
918 = to_sti_hdmi_connector(connector);
919 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
920
921
922 result = clk_round_rate(hdmi->clk_pix, target);
923
924 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
925 target, result);
926
927 if ((result < target_min) || (result > target_max)) {
928 DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
929 return MODE_BAD;
930 }
931
932 return MODE_OK;
933 }
934
935 static const
936 struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
937 .get_modes = sti_hdmi_connector_get_modes,
938 .mode_valid = sti_hdmi_connector_mode_valid,
939 };
940
941 /* get detection status of display device */
942 static enum drm_connector_status
943 sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
944 {
945 struct sti_hdmi_connector *hdmi_connector
946 = to_sti_hdmi_connector(connector);
947 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
948
949 DRM_DEBUG_DRIVER("\n");
950
951 if (hdmi->hpd) {
952 DRM_DEBUG_DRIVER("hdmi cable connected\n");
953 return connector_status_connected;
954 }
955
956 DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
957 return connector_status_disconnected;
958 }
959
960 static void sti_hdmi_connector_init_property(struct drm_device *drm_dev,
961 struct drm_connector *connector)
962 {
963 struct sti_hdmi_connector *hdmi_connector
964 = to_sti_hdmi_connector(connector);
965 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
966 struct drm_property *prop;
967
968 /* colorspace property */
969 hdmi->colorspace = DEFAULT_COLORSPACE_MODE;
970 prop = drm_property_create_enum(drm_dev, 0, "colorspace",
971 colorspace_mode_names,
972 ARRAY_SIZE(colorspace_mode_names));
973 if (!prop) {
974 DRM_ERROR("fails to create colorspace property\n");
975 return;
976 }
977 hdmi_connector->colorspace_property = prop;
978 drm_object_attach_property(&connector->base, prop, hdmi->colorspace);
979
980 /* hdmi_mode property */
981 hdmi->hdmi_mode = DEFAULT_HDMI_MODE;
982 prop = drm_property_create_enum(drm_dev, 0, "hdmi_mode",
983 hdmi_mode_names,
984 ARRAY_SIZE(hdmi_mode_names));
985 if (!prop) {
986 DRM_ERROR("fails to create colorspace property\n");
987 return;
988 }
989 hdmi_connector->hdmi_mode_property = prop;
990 drm_object_attach_property(&connector->base, prop, hdmi->hdmi_mode);
991
992 }
993
994 static int
995 sti_hdmi_connector_set_property(struct drm_connector *connector,
996 struct drm_connector_state *state,
997 struct drm_property *property,
998 uint64_t val)
999 {
1000 struct sti_hdmi_connector *hdmi_connector
1001 = to_sti_hdmi_connector(connector);
1002 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1003
1004 if (property == hdmi_connector->colorspace_property) {
1005 hdmi->colorspace = val;
1006 return 0;
1007 }
1008
1009 if (property == hdmi_connector->hdmi_mode_property) {
1010 hdmi->hdmi_mode = val;
1011 return 0;
1012 }
1013
1014 DRM_ERROR("failed to set hdmi connector property\n");
1015 return -EINVAL;
1016 }
1017
1018 static int
1019 sti_hdmi_connector_get_property(struct drm_connector *connector,
1020 const struct drm_connector_state *state,
1021 struct drm_property *property,
1022 uint64_t *val)
1023 {
1024 struct sti_hdmi_connector *hdmi_connector
1025 = to_sti_hdmi_connector(connector);
1026 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1027
1028 if (property == hdmi_connector->colorspace_property) {
1029 *val = hdmi->colorspace;
1030 return 0;
1031 }
1032
1033 if (property == hdmi_connector->hdmi_mode_property) {
1034 *val = hdmi->hdmi_mode;
1035 return 0;
1036 }
1037
1038 DRM_ERROR("failed to get hdmi connector property\n");
1039 return -EINVAL;
1040 }
1041
1042 static int sti_hdmi_late_register(struct drm_connector *connector)
1043 {
1044 struct sti_hdmi_connector *hdmi_connector
1045 = to_sti_hdmi_connector(connector);
1046 struct sti_hdmi *hdmi = hdmi_connector->hdmi;
1047
1048 if (hdmi_debugfs_init(hdmi, hdmi->drm_dev->primary)) {
1049 DRM_ERROR("HDMI debugfs setup failed\n");
1050 return -EINVAL;
1051 }
1052
1053 return 0;
1054 }
1055
1056 static const struct drm_connector_funcs sti_hdmi_connector_funcs = {
1057 .fill_modes = drm_helper_probe_single_connector_modes,
1058 .detect = sti_hdmi_connector_detect,
1059 .destroy = drm_connector_cleanup,
1060 .reset = drm_atomic_helper_connector_reset,
1061 .set_property = drm_atomic_helper_connector_set_property,
1062 .atomic_set_property = sti_hdmi_connector_set_property,
1063 .atomic_get_property = sti_hdmi_connector_get_property,
1064 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1065 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1066 .late_register = sti_hdmi_late_register,
1067 };
1068
1069 static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
1070 {
1071 struct drm_encoder *encoder;
1072
1073 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
1074 if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
1075 return encoder;
1076 }
1077
1078 return NULL;
1079 }
1080
1081 /**
1082 * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
1083 * clocks. None-coherent clocks means that audio and TMDS clocks have not the
1084 * same source (drifts between clocks). In this case assumption is that CTS is
1085 * automatically calculated by hardware.
1086 *
1087 * @audio_fs: audio frame clock frequency in Hz
1088 *
1089 * Values computed are based on table described in HDMI specification 1.4b
1090 *
1091 * Returns n value.
1092 */
1093 static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
1094 {
1095 unsigned int n;
1096
1097 switch (audio_fs) {
1098 case 32000:
1099 n = 4096;
1100 break;
1101 case 44100:
1102 n = 6272;
1103 break;
1104 case 48000:
1105 n = 6144;
1106 break;
1107 case 88200:
1108 n = 6272 * 2;
1109 break;
1110 case 96000:
1111 n = 6144 * 2;
1112 break;
1113 case 176400:
1114 n = 6272 * 4;
1115 break;
1116 case 192000:
1117 n = 6144 * 4;
1118 break;
1119 default:
1120 /* Not pre-defined, recommended value: 128 * fs / 1000 */
1121 n = (audio_fs * 128) / 1000;
1122 }
1123
1124 return n;
1125 }
1126
1127 static int hdmi_audio_configure(struct sti_hdmi *hdmi,
1128 struct hdmi_audio_params *params)
1129 {
1130 int audio_cfg, n;
1131 struct hdmi_audio_infoframe *info = &params->cea;
1132
1133 DRM_DEBUG_DRIVER("\n");
1134
1135 if (!hdmi->enabled)
1136 return 0;
1137
1138 /* update N parameter */
1139 n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
1140
1141 DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
1142 params->sample_rate, hdmi->mode.clock * 1000, n);
1143 hdmi_write(hdmi, n, HDMI_AUDN);
1144
1145 /* update HDMI registers according to configuration */
1146 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1147 HDMI_AUD_CFG_ONE_BIT_INVALID;
1148
1149 switch (info->channels) {
1150 case 8:
1151 audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
1152 case 6:
1153 audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
1154 case 4:
1155 audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
1156 case 2:
1157 audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
1158 break;
1159 default:
1160 DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
1161 info->channels);
1162 return -EINVAL;
1163 }
1164
1165 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1166
1167 hdmi->audio = *params;
1168
1169 return hdmi_audio_infoframe_config(hdmi);
1170 }
1171
1172 static void hdmi_audio_shutdown(struct device *dev, void *data)
1173 {
1174 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1175 int audio_cfg;
1176
1177 DRM_DEBUG_DRIVER("\n");
1178
1179 /* disable audio */
1180 audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
1181 HDMI_AUD_CFG_ONE_BIT_INVALID;
1182 hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
1183
1184 hdmi->audio.enabled = 0;
1185 hdmi_audio_infoframe_config(hdmi);
1186 }
1187
1188 static int hdmi_audio_hw_params(struct device *dev,
1189 void *data,
1190 struct hdmi_codec_daifmt *daifmt,
1191 struct hdmi_codec_params *params)
1192 {
1193 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1194 int ret;
1195 struct hdmi_audio_params audio = {
1196 .sample_width = params->sample_width,
1197 .sample_rate = params->sample_rate,
1198 .cea = params->cea,
1199 };
1200
1201 DRM_DEBUG_DRIVER("\n");
1202
1203 if (!hdmi->enabled)
1204 return 0;
1205
1206 if ((daifmt->fmt != HDMI_I2S) || daifmt->bit_clk_inv ||
1207 daifmt->frame_clk_inv || daifmt->bit_clk_master ||
1208 daifmt->frame_clk_master) {
1209 dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
1210 daifmt->bit_clk_inv, daifmt->frame_clk_inv,
1211 daifmt->bit_clk_master,
1212 daifmt->frame_clk_master);
1213 return -EINVAL;
1214 }
1215
1216 audio.enabled = 1;
1217
1218 ret = hdmi_audio_configure(hdmi, &audio);
1219 if (ret < 0)
1220 return ret;
1221
1222 return 0;
1223 }
1224
1225 static int hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
1226 {
1227 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1228
1229 DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
1230
1231 if (enable)
1232 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
1233 else
1234 hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
1235
1236 return 0;
1237 }
1238
1239 static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1240 {
1241 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1242 struct drm_connector *connector = hdmi->drm_connector;
1243
1244 DRM_DEBUG_DRIVER("\n");
1245 memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
1246
1247 return 0;
1248 }
1249
1250 static const struct hdmi_codec_ops audio_codec_ops = {
1251 .hw_params = hdmi_audio_hw_params,
1252 .audio_shutdown = hdmi_audio_shutdown,
1253 .digital_mute = hdmi_audio_digital_mute,
1254 .get_eld = hdmi_audio_get_eld,
1255 };
1256
1257 static int sti_hdmi_register_audio_driver(struct device *dev,
1258 struct sti_hdmi *hdmi)
1259 {
1260 struct hdmi_codec_pdata codec_data = {
1261 .ops = &audio_codec_ops,
1262 .max_i2s_channels = 8,
1263 .i2s = 1,
1264 };
1265
1266 DRM_DEBUG_DRIVER("\n");
1267
1268 hdmi->audio.enabled = 0;
1269
1270 hdmi->audio_pdev = platform_device_register_data(
1271 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
1272 &codec_data, sizeof(codec_data));
1273
1274 if (IS_ERR(hdmi->audio_pdev))
1275 return PTR_ERR(hdmi->audio_pdev);
1276
1277 DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
1278
1279 return 0;
1280 }
1281
1282 static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
1283 {
1284 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1285 struct drm_device *drm_dev = data;
1286 struct drm_encoder *encoder;
1287 struct sti_hdmi_connector *connector;
1288 struct drm_connector *drm_connector;
1289 struct drm_bridge *bridge;
1290 int err;
1291
1292 /* Set the drm device handle */
1293 hdmi->drm_dev = drm_dev;
1294
1295 encoder = sti_hdmi_find_encoder(drm_dev);
1296 if (!encoder)
1297 return -EINVAL;
1298
1299 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
1300 if (!connector)
1301 return -EINVAL;
1302
1303 connector->hdmi = hdmi;
1304
1305 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
1306 if (!bridge)
1307 return -EINVAL;
1308
1309 bridge->driver_private = hdmi;
1310 bridge->funcs = &sti_hdmi_bridge_funcs;
1311 drm_bridge_attach(drm_dev, bridge);
1312
1313 encoder->bridge = bridge;
1314 connector->encoder = encoder;
1315
1316 drm_connector = (struct drm_connector *)connector;
1317
1318 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
1319
1320 drm_connector_init(drm_dev, drm_connector,
1321 &sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA);
1322 drm_connector_helper_add(drm_connector,
1323 &sti_hdmi_connector_helper_funcs);
1324
1325 /* initialise property */
1326 sti_hdmi_connector_init_property(drm_dev, drm_connector);
1327
1328 hdmi->drm_connector = drm_connector;
1329
1330 err = drm_mode_connector_attach_encoder(drm_connector, encoder);
1331 if (err) {
1332 DRM_ERROR("Failed to attach a connector to a encoder\n");
1333 goto err_sysfs;
1334 }
1335
1336 err = sti_hdmi_register_audio_driver(dev, hdmi);
1337 if (err) {
1338 DRM_ERROR("Failed to attach an audio codec\n");
1339 goto err_sysfs;
1340 }
1341
1342 /* Initialize audio infoframe */
1343 err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
1344 if (err) {
1345 DRM_ERROR("Failed to init audio infoframe\n");
1346 goto err_sysfs;
1347 }
1348
1349 /* Enable default interrupts */
1350 hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
1351
1352 return 0;
1353
1354 err_sysfs:
1355 drm_bridge_remove(bridge);
1356 hdmi->drm_connector = NULL;
1357 return -EINVAL;
1358 }
1359
1360 static void sti_hdmi_unbind(struct device *dev,
1361 struct device *master, void *data)
1362 {
1363 struct sti_hdmi *hdmi = dev_get_drvdata(dev);
1364 struct drm_device *drm_dev = data;
1365
1366 hdmi_debugfs_exit(hdmi, drm_dev->primary);
1367 }
1368
1369 static const struct component_ops sti_hdmi_ops = {
1370 .bind = sti_hdmi_bind,
1371 .unbind = sti_hdmi_unbind,
1372 };
1373
1374 static const struct of_device_id hdmi_of_match[] = {
1375 {
1376 .compatible = "st,stih416-hdmi",
1377 .data = &tx3g0c55phy_ops,
1378 }, {
1379 .compatible = "st,stih407-hdmi",
1380 .data = &tx3g4c28phy_ops,
1381 }, {
1382 /* end node */
1383 }
1384 };
1385 MODULE_DEVICE_TABLE(of, hdmi_of_match);
1386
1387 static int sti_hdmi_probe(struct platform_device *pdev)
1388 {
1389 struct device *dev = &pdev->dev;
1390 struct sti_hdmi *hdmi;
1391 struct device_node *np = dev->of_node;
1392 struct resource *res;
1393 struct device_node *ddc;
1394 int ret;
1395
1396 DRM_INFO("%s\n", __func__);
1397
1398 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1399 if (!hdmi)
1400 return -ENOMEM;
1401
1402 ddc = of_parse_phandle(pdev->dev.of_node, "ddc", 0);
1403 if (ddc) {
1404 hdmi->ddc_adapt = of_get_i2c_adapter_by_node(ddc);
1405 of_node_put(ddc);
1406 if (!hdmi->ddc_adapt)
1407 return -EPROBE_DEFER;
1408 }
1409
1410 hdmi->dev = pdev->dev;
1411
1412 /* Get resources */
1413 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
1414 if (!res) {
1415 DRM_ERROR("Invalid hdmi resource\n");
1416 ret = -ENOMEM;
1417 goto release_adapter;
1418 }
1419 hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
1420 if (!hdmi->regs) {
1421 ret = -ENOMEM;
1422 goto release_adapter;
1423 }
1424
1425 if (of_device_is_compatible(np, "st,stih416-hdmi")) {
1426 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1427 "syscfg");
1428 if (!res) {
1429 DRM_ERROR("Invalid syscfg resource\n");
1430 ret = -ENOMEM;
1431 goto release_adapter;
1432 }
1433 hdmi->syscfg = devm_ioremap_nocache(dev, res->start,
1434 resource_size(res));
1435 if (!hdmi->syscfg) {
1436 ret = -ENOMEM;
1437 goto release_adapter;
1438 }
1439 }
1440
1441 hdmi->phy_ops = (struct hdmi_phy_ops *)
1442 of_match_node(hdmi_of_match, np)->data;
1443
1444 /* Get clock resources */
1445 hdmi->clk_pix = devm_clk_get(dev, "pix");
1446 if (IS_ERR(hdmi->clk_pix)) {
1447 DRM_ERROR("Cannot get hdmi_pix clock\n");
1448 ret = PTR_ERR(hdmi->clk_pix);
1449 goto release_adapter;
1450 }
1451
1452 hdmi->clk_tmds = devm_clk_get(dev, "tmds");
1453 if (IS_ERR(hdmi->clk_tmds)) {
1454 DRM_ERROR("Cannot get hdmi_tmds clock\n");
1455 ret = PTR_ERR(hdmi->clk_tmds);
1456 goto release_adapter;
1457 }
1458
1459 hdmi->clk_phy = devm_clk_get(dev, "phy");
1460 if (IS_ERR(hdmi->clk_phy)) {
1461 DRM_ERROR("Cannot get hdmi_phy clock\n");
1462 ret = PTR_ERR(hdmi->clk_phy);
1463 goto release_adapter;
1464 }
1465
1466 hdmi->clk_audio = devm_clk_get(dev, "audio");
1467 if (IS_ERR(hdmi->clk_audio)) {
1468 DRM_ERROR("Cannot get hdmi_audio clock\n");
1469 ret = PTR_ERR(hdmi->clk_audio);
1470 goto release_adapter;
1471 }
1472
1473 hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
1474
1475 init_waitqueue_head(&hdmi->wait_event);
1476
1477 hdmi->irq = platform_get_irq_byname(pdev, "irq");
1478
1479 ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
1480 hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
1481 if (ret) {
1482 DRM_ERROR("Failed to register HDMI interrupt\n");
1483 goto release_adapter;
1484 }
1485
1486 hdmi->reset = devm_reset_control_get(dev, "hdmi");
1487 /* Take hdmi out of reset */
1488 if (!IS_ERR(hdmi->reset))
1489 reset_control_deassert(hdmi->reset);
1490
1491 platform_set_drvdata(pdev, hdmi);
1492
1493 return component_add(&pdev->dev, &sti_hdmi_ops);
1494
1495 release_adapter:
1496 i2c_put_adapter(hdmi->ddc_adapt);
1497
1498 return ret;
1499 }
1500
1501 static int sti_hdmi_remove(struct platform_device *pdev)
1502 {
1503 struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
1504
1505 i2c_put_adapter(hdmi->ddc_adapt);
1506 if (hdmi->audio_pdev)
1507 platform_device_unregister(hdmi->audio_pdev);
1508 component_del(&pdev->dev, &sti_hdmi_ops);
1509
1510 return 0;
1511 }
1512
1513 struct platform_driver sti_hdmi_driver = {
1514 .driver = {
1515 .name = "sti-hdmi",
1516 .owner = THIS_MODULE,
1517 .of_match_table = hdmi_of_match,
1518 },
1519 .probe = sti_hdmi_probe,
1520 .remove = sti_hdmi_remove,
1521 };
1522
1523 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
1524 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
1525 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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