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vfio/pci: Fix typos in comments
[deliverable/linux.git] / drivers / gpu / drm / bridge / dw-hdmi.c
1 /*
2 * Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * Designware High-Definition Multimedia Interface (HDMI) driver
10 *
11 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
12 */
13 #include <linux/module.h>
14 #include <linux/irq.h>
15 #include <linux/delay.h>
16 #include <linux/err.h>
17 #include <linux/clk.h>
18 #include <linux/hdmi.h>
19 #include <linux/mutex.h>
20 #include <linux/of_device.h>
21 #include <linux/spinlock.h>
22
23 #include <drm/drm_of.h>
24 #include <drm/drmP.h>
25 #include <drm/drm_atomic_helper.h>
26 #include <drm/drm_crtc_helper.h>
27 #include <drm/drm_edid.h>
28 #include <drm/drm_encoder_slave.h>
29 #include <drm/bridge/dw_hdmi.h>
30
31 #include "dw-hdmi.h"
32 #include "dw-hdmi-audio.h"
33
34 #define HDMI_EDID_LEN 512
35
36 #define RGB 0
37 #define YCBCR444 1
38 #define YCBCR422_16BITS 2
39 #define YCBCR422_8BITS 3
40 #define XVYCC444 4
41
42 enum hdmi_datamap {
43 RGB444_8B = 0x01,
44 RGB444_10B = 0x03,
45 RGB444_12B = 0x05,
46 RGB444_16B = 0x07,
47 YCbCr444_8B = 0x09,
48 YCbCr444_10B = 0x0B,
49 YCbCr444_12B = 0x0D,
50 YCbCr444_16B = 0x0F,
51 YCbCr422_8B = 0x16,
52 YCbCr422_10B = 0x14,
53 YCbCr422_12B = 0x12,
54 };
55
56 static const u16 csc_coeff_default[3][4] = {
57 { 0x2000, 0x0000, 0x0000, 0x0000 },
58 { 0x0000, 0x2000, 0x0000, 0x0000 },
59 { 0x0000, 0x0000, 0x2000, 0x0000 }
60 };
61
62 static const u16 csc_coeff_rgb_out_eitu601[3][4] = {
63 { 0x2000, 0x6926, 0x74fd, 0x010e },
64 { 0x2000, 0x2cdd, 0x0000, 0x7e9a },
65 { 0x2000, 0x0000, 0x38b4, 0x7e3b }
66 };
67
68 static const u16 csc_coeff_rgb_out_eitu709[3][4] = {
69 { 0x2000, 0x7106, 0x7a02, 0x00a7 },
70 { 0x2000, 0x3264, 0x0000, 0x7e6d },
71 { 0x2000, 0x0000, 0x3b61, 0x7e25 }
72 };
73
74 static const u16 csc_coeff_rgb_in_eitu601[3][4] = {
75 { 0x2591, 0x1322, 0x074b, 0x0000 },
76 { 0x6535, 0x2000, 0x7acc, 0x0200 },
77 { 0x6acd, 0x7534, 0x2000, 0x0200 }
78 };
79
80 static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
81 { 0x2dc5, 0x0d9b, 0x049e, 0x0000 },
82 { 0x62f0, 0x2000, 0x7d11, 0x0200 },
83 { 0x6756, 0x78ab, 0x2000, 0x0200 }
84 };
85
86 struct hdmi_vmode {
87 bool mdataenablepolarity;
88
89 unsigned int mpixelclock;
90 unsigned int mpixelrepetitioninput;
91 unsigned int mpixelrepetitionoutput;
92 };
93
94 struct hdmi_data_info {
95 unsigned int enc_in_format;
96 unsigned int enc_out_format;
97 unsigned int enc_color_depth;
98 unsigned int colorimetry;
99 unsigned int pix_repet_factor;
100 unsigned int hdcp_enable;
101 struct hdmi_vmode video_mode;
102 };
103
104 struct dw_hdmi {
105 struct drm_connector connector;
106 struct drm_encoder *encoder;
107 struct drm_bridge *bridge;
108
109 struct platform_device *audio;
110 enum dw_hdmi_devtype dev_type;
111 struct device *dev;
112 struct clk *isfr_clk;
113 struct clk *iahb_clk;
114
115 struct hdmi_data_info hdmi_data;
116 const struct dw_hdmi_plat_data *plat_data;
117
118 int vic;
119
120 u8 edid[HDMI_EDID_LEN];
121 bool cable_plugin;
122
123 bool phy_enabled;
124 struct drm_display_mode previous_mode;
125
126 struct i2c_adapter *ddc;
127 void __iomem *regs;
128 bool sink_is_hdmi;
129 bool sink_has_audio;
130
131 struct mutex mutex; /* for state below and previous_mode */
132 enum drm_connector_force force; /* mutex-protected force state */
133 bool disabled; /* DRM has disabled our bridge */
134 bool bridge_is_on; /* indicates the bridge is on */
135 bool rxsense; /* rxsense state */
136 u8 phy_mask; /* desired phy int mask settings */
137
138 spinlock_t audio_lock;
139 struct mutex audio_mutex;
140 unsigned int sample_rate;
141 unsigned int audio_cts;
142 unsigned int audio_n;
143 bool audio_enable;
144
145 void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
146 u8 (*read)(struct dw_hdmi *hdmi, int offset);
147 };
148
149 #define HDMI_IH_PHY_STAT0_RX_SENSE \
150 (HDMI_IH_PHY_STAT0_RX_SENSE0 | HDMI_IH_PHY_STAT0_RX_SENSE1 | \
151 HDMI_IH_PHY_STAT0_RX_SENSE2 | HDMI_IH_PHY_STAT0_RX_SENSE3)
152
153 #define HDMI_PHY_RX_SENSE \
154 (HDMI_PHY_RX_SENSE0 | HDMI_PHY_RX_SENSE1 | \
155 HDMI_PHY_RX_SENSE2 | HDMI_PHY_RX_SENSE3)
156
157 static void dw_hdmi_writel(struct dw_hdmi *hdmi, u8 val, int offset)
158 {
159 writel(val, hdmi->regs + (offset << 2));
160 }
161
162 static u8 dw_hdmi_readl(struct dw_hdmi *hdmi, int offset)
163 {
164 return readl(hdmi->regs + (offset << 2));
165 }
166
167 static void dw_hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
168 {
169 writeb(val, hdmi->regs + offset);
170 }
171
172 static u8 dw_hdmi_readb(struct dw_hdmi *hdmi, int offset)
173 {
174 return readb(hdmi->regs + offset);
175 }
176
177 static inline void hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
178 {
179 hdmi->write(hdmi, val, offset);
180 }
181
182 static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
183 {
184 return hdmi->read(hdmi, offset);
185 }
186
187 static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
188 {
189 u8 val = hdmi_readb(hdmi, reg) & ~mask;
190
191 val |= data & mask;
192 hdmi_writeb(hdmi, val, reg);
193 }
194
195 static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg,
196 u8 shift, u8 mask)
197 {
198 hdmi_modb(hdmi, data << shift, mask, reg);
199 }
200
201 static void hdmi_set_cts_n(struct dw_hdmi *hdmi, unsigned int cts,
202 unsigned int n)
203 {
204 /* Must be set/cleared first */
205 hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
206
207 /* nshift factor = 0 */
208 hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_N_SHIFT_MASK, HDMI_AUD_CTS3);
209
210 hdmi_writeb(hdmi, ((cts >> 16) & HDMI_AUD_CTS3_AUDCTS19_16_MASK) |
211 HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
212 hdmi_writeb(hdmi, (cts >> 8) & 0xff, HDMI_AUD_CTS2);
213 hdmi_writeb(hdmi, cts & 0xff, HDMI_AUD_CTS1);
214
215 hdmi_writeb(hdmi, (n >> 16) & 0x0f, HDMI_AUD_N3);
216 hdmi_writeb(hdmi, (n >> 8) & 0xff, HDMI_AUD_N2);
217 hdmi_writeb(hdmi, n & 0xff, HDMI_AUD_N1);
218 }
219
220 static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk)
221 {
222 unsigned int n = (128 * freq) / 1000;
223 unsigned int mult = 1;
224
225 while (freq > 48000) {
226 mult *= 2;
227 freq /= 2;
228 }
229
230 switch (freq) {
231 case 32000:
232 if (pixel_clk == 25175000)
233 n = 4576;
234 else if (pixel_clk == 27027000)
235 n = 4096;
236 else if (pixel_clk == 74176000 || pixel_clk == 148352000)
237 n = 11648;
238 else
239 n = 4096;
240 n *= mult;
241 break;
242
243 case 44100:
244 if (pixel_clk == 25175000)
245 n = 7007;
246 else if (pixel_clk == 74176000)
247 n = 17836;
248 else if (pixel_clk == 148352000)
249 n = 8918;
250 else
251 n = 6272;
252 n *= mult;
253 break;
254
255 case 48000:
256 if (pixel_clk == 25175000)
257 n = 6864;
258 else if (pixel_clk == 27027000)
259 n = 6144;
260 else if (pixel_clk == 74176000)
261 n = 11648;
262 else if (pixel_clk == 148352000)
263 n = 5824;
264 else
265 n = 6144;
266 n *= mult;
267 break;
268
269 default:
270 break;
271 }
272
273 return n;
274 }
275
276 static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
277 unsigned long pixel_clk, unsigned int sample_rate)
278 {
279 unsigned long ftdms = pixel_clk;
280 unsigned int n, cts;
281 u64 tmp;
282
283 n = hdmi_compute_n(sample_rate, pixel_clk);
284
285 /*
286 * Compute the CTS value from the N value. Note that CTS and N
287 * can be up to 20 bits in total, so we need 64-bit math. Also
288 * note that our TDMS clock is not fully accurate; it is accurate
289 * to kHz. This can introduce an unnecessary remainder in the
290 * calculation below, so we don't try to warn about that.
291 */
292 tmp = (u64)ftdms * n;
293 do_div(tmp, 128 * sample_rate);
294 cts = tmp;
295
296 dev_dbg(hdmi->dev, "%s: fs=%uHz ftdms=%lu.%03luMHz N=%d cts=%d\n",
297 __func__, sample_rate, ftdms / 1000000, (ftdms / 1000) % 1000,
298 n, cts);
299
300 spin_lock_irq(&hdmi->audio_lock);
301 hdmi->audio_n = n;
302 hdmi->audio_cts = cts;
303 hdmi_set_cts_n(hdmi, cts, hdmi->audio_enable ? n : 0);
304 spin_unlock_irq(&hdmi->audio_lock);
305 }
306
307 static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
308 {
309 mutex_lock(&hdmi->audio_mutex);
310 hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate);
311 mutex_unlock(&hdmi->audio_mutex);
312 }
313
314 static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
315 {
316 mutex_lock(&hdmi->audio_mutex);
317 hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
318 hdmi->sample_rate);
319 mutex_unlock(&hdmi->audio_mutex);
320 }
321
322 void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
323 {
324 mutex_lock(&hdmi->audio_mutex);
325 hdmi->sample_rate = rate;
326 hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
327 hdmi->sample_rate);
328 mutex_unlock(&hdmi->audio_mutex);
329 }
330 EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
331
332 void dw_hdmi_audio_enable(struct dw_hdmi *hdmi)
333 {
334 unsigned long flags;
335
336 spin_lock_irqsave(&hdmi->audio_lock, flags);
337 hdmi->audio_enable = true;
338 hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
339 spin_unlock_irqrestore(&hdmi->audio_lock, flags);
340 }
341 EXPORT_SYMBOL_GPL(dw_hdmi_audio_enable);
342
343 void dw_hdmi_audio_disable(struct dw_hdmi *hdmi)
344 {
345 unsigned long flags;
346
347 spin_lock_irqsave(&hdmi->audio_lock, flags);
348 hdmi->audio_enable = false;
349 hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0);
350 spin_unlock_irqrestore(&hdmi->audio_lock, flags);
351 }
352 EXPORT_SYMBOL_GPL(dw_hdmi_audio_disable);
353
354 /*
355 * this submodule is responsible for the video data synchronization.
356 * for example, for RGB 4:4:4 input, the data map is defined as
357 * pin{47~40} <==> R[7:0]
358 * pin{31~24} <==> G[7:0]
359 * pin{15~8} <==> B[7:0]
360 */
361 static void hdmi_video_sample(struct dw_hdmi *hdmi)
362 {
363 int color_format = 0;
364 u8 val;
365
366 if (hdmi->hdmi_data.enc_in_format == RGB) {
367 if (hdmi->hdmi_data.enc_color_depth == 8)
368 color_format = 0x01;
369 else if (hdmi->hdmi_data.enc_color_depth == 10)
370 color_format = 0x03;
371 else if (hdmi->hdmi_data.enc_color_depth == 12)
372 color_format = 0x05;
373 else if (hdmi->hdmi_data.enc_color_depth == 16)
374 color_format = 0x07;
375 else
376 return;
377 } else if (hdmi->hdmi_data.enc_in_format == YCBCR444) {
378 if (hdmi->hdmi_data.enc_color_depth == 8)
379 color_format = 0x09;
380 else if (hdmi->hdmi_data.enc_color_depth == 10)
381 color_format = 0x0B;
382 else if (hdmi->hdmi_data.enc_color_depth == 12)
383 color_format = 0x0D;
384 else if (hdmi->hdmi_data.enc_color_depth == 16)
385 color_format = 0x0F;
386 else
387 return;
388 } else if (hdmi->hdmi_data.enc_in_format == YCBCR422_8BITS) {
389 if (hdmi->hdmi_data.enc_color_depth == 8)
390 color_format = 0x16;
391 else if (hdmi->hdmi_data.enc_color_depth == 10)
392 color_format = 0x14;
393 else if (hdmi->hdmi_data.enc_color_depth == 12)
394 color_format = 0x12;
395 else
396 return;
397 }
398
399 val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE |
400 ((color_format << HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET) &
401 HDMI_TX_INVID0_VIDEO_MAPPING_MASK);
402 hdmi_writeb(hdmi, val, HDMI_TX_INVID0);
403
404 /* Enable TX stuffing: When DE is inactive, fix the output data to 0 */
405 val = HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE |
406 HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE |
407 HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE;
408 hdmi_writeb(hdmi, val, HDMI_TX_INSTUFFING);
409 hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA0);
410 hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA1);
411 hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA0);
412 hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA1);
413 hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA0);
414 hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA1);
415 }
416
417 static int is_color_space_conversion(struct dw_hdmi *hdmi)
418 {
419 return hdmi->hdmi_data.enc_in_format != hdmi->hdmi_data.enc_out_format;
420 }
421
422 static int is_color_space_decimation(struct dw_hdmi *hdmi)
423 {
424 if (hdmi->hdmi_data.enc_out_format != YCBCR422_8BITS)
425 return 0;
426 if (hdmi->hdmi_data.enc_in_format == RGB ||
427 hdmi->hdmi_data.enc_in_format == YCBCR444)
428 return 1;
429 return 0;
430 }
431
432 static int is_color_space_interpolation(struct dw_hdmi *hdmi)
433 {
434 if (hdmi->hdmi_data.enc_in_format != YCBCR422_8BITS)
435 return 0;
436 if (hdmi->hdmi_data.enc_out_format == RGB ||
437 hdmi->hdmi_data.enc_out_format == YCBCR444)
438 return 1;
439 return 0;
440 }
441
442 static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi)
443 {
444 const u16 (*csc_coeff)[3][4] = &csc_coeff_default;
445 unsigned i;
446 u32 csc_scale = 1;
447
448 if (is_color_space_conversion(hdmi)) {
449 if (hdmi->hdmi_data.enc_out_format == RGB) {
450 if (hdmi->hdmi_data.colorimetry ==
451 HDMI_COLORIMETRY_ITU_601)
452 csc_coeff = &csc_coeff_rgb_out_eitu601;
453 else
454 csc_coeff = &csc_coeff_rgb_out_eitu709;
455 } else if (hdmi->hdmi_data.enc_in_format == RGB) {
456 if (hdmi->hdmi_data.colorimetry ==
457 HDMI_COLORIMETRY_ITU_601)
458 csc_coeff = &csc_coeff_rgb_in_eitu601;
459 else
460 csc_coeff = &csc_coeff_rgb_in_eitu709;
461 csc_scale = 0;
462 }
463 }
464
465 /* The CSC registers are sequential, alternating MSB then LSB */
466 for (i = 0; i < ARRAY_SIZE(csc_coeff_default[0]); i++) {
467 u16 coeff_a = (*csc_coeff)[0][i];
468 u16 coeff_b = (*csc_coeff)[1][i];
469 u16 coeff_c = (*csc_coeff)[2][i];
470
471 hdmi_writeb(hdmi, coeff_a & 0xff, HDMI_CSC_COEF_A1_LSB + i * 2);
472 hdmi_writeb(hdmi, coeff_a >> 8, HDMI_CSC_COEF_A1_MSB + i * 2);
473 hdmi_writeb(hdmi, coeff_b & 0xff, HDMI_CSC_COEF_B1_LSB + i * 2);
474 hdmi_writeb(hdmi, coeff_b >> 8, HDMI_CSC_COEF_B1_MSB + i * 2);
475 hdmi_writeb(hdmi, coeff_c & 0xff, HDMI_CSC_COEF_C1_LSB + i * 2);
476 hdmi_writeb(hdmi, coeff_c >> 8, HDMI_CSC_COEF_C1_MSB + i * 2);
477 }
478
479 hdmi_modb(hdmi, csc_scale, HDMI_CSC_SCALE_CSCSCALE_MASK,
480 HDMI_CSC_SCALE);
481 }
482
483 static void hdmi_video_csc(struct dw_hdmi *hdmi)
484 {
485 int color_depth = 0;
486 int interpolation = HDMI_CSC_CFG_INTMODE_DISABLE;
487 int decimation = 0;
488
489 /* YCC422 interpolation to 444 mode */
490 if (is_color_space_interpolation(hdmi))
491 interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1;
492 else if (is_color_space_decimation(hdmi))
493 decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3;
494
495 if (hdmi->hdmi_data.enc_color_depth == 8)
496 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP;
497 else if (hdmi->hdmi_data.enc_color_depth == 10)
498 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP;
499 else if (hdmi->hdmi_data.enc_color_depth == 12)
500 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP;
501 else if (hdmi->hdmi_data.enc_color_depth == 16)
502 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP;
503 else
504 return;
505
506 /* Configure the CSC registers */
507 hdmi_writeb(hdmi, interpolation | decimation, HDMI_CSC_CFG);
508 hdmi_modb(hdmi, color_depth, HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK,
509 HDMI_CSC_SCALE);
510
511 dw_hdmi_update_csc_coeffs(hdmi);
512 }
513
514 /*
515 * HDMI video packetizer is used to packetize the data.
516 * for example, if input is YCC422 mode or repeater is used,
517 * data should be repacked this module can be bypassed.
518 */
519 static void hdmi_video_packetize(struct dw_hdmi *hdmi)
520 {
521 unsigned int color_depth = 0;
522 unsigned int remap_size = HDMI_VP_REMAP_YCC422_16bit;
523 unsigned int output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_PP;
524 struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
525 u8 val, vp_conf;
526
527 if (hdmi_data->enc_out_format == RGB ||
528 hdmi_data->enc_out_format == YCBCR444) {
529 if (!hdmi_data->enc_color_depth) {
530 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
531 } else if (hdmi_data->enc_color_depth == 8) {
532 color_depth = 4;
533 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
534 } else if (hdmi_data->enc_color_depth == 10) {
535 color_depth = 5;
536 } else if (hdmi_data->enc_color_depth == 12) {
537 color_depth = 6;
538 } else if (hdmi_data->enc_color_depth == 16) {
539 color_depth = 7;
540 } else {
541 return;
542 }
543 } else if (hdmi_data->enc_out_format == YCBCR422_8BITS) {
544 if (!hdmi_data->enc_color_depth ||
545 hdmi_data->enc_color_depth == 8)
546 remap_size = HDMI_VP_REMAP_YCC422_16bit;
547 else if (hdmi_data->enc_color_depth == 10)
548 remap_size = HDMI_VP_REMAP_YCC422_20bit;
549 else if (hdmi_data->enc_color_depth == 12)
550 remap_size = HDMI_VP_REMAP_YCC422_24bit;
551 else
552 return;
553 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422;
554 } else {
555 return;
556 }
557
558 /* set the packetizer registers */
559 val = ((color_depth << HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET) &
560 HDMI_VP_PR_CD_COLOR_DEPTH_MASK) |
561 ((hdmi_data->pix_repet_factor <<
562 HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET) &
563 HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK);
564 hdmi_writeb(hdmi, val, HDMI_VP_PR_CD);
565
566 hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE,
567 HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF);
568
569 /* Data from pixel repeater block */
570 if (hdmi_data->pix_repet_factor > 1) {
571 vp_conf = HDMI_VP_CONF_PR_EN_ENABLE |
572 HDMI_VP_CONF_BYPASS_SELECT_PIX_REPEATER;
573 } else { /* data from packetizer block */
574 vp_conf = HDMI_VP_CONF_PR_EN_DISABLE |
575 HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER;
576 }
577
578 hdmi_modb(hdmi, vp_conf,
579 HDMI_VP_CONF_PR_EN_MASK |
580 HDMI_VP_CONF_BYPASS_SELECT_MASK, HDMI_VP_CONF);
581
582 hdmi_modb(hdmi, 1 << HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET,
583 HDMI_VP_STUFF_IDEFAULT_PHASE_MASK, HDMI_VP_STUFF);
584
585 hdmi_writeb(hdmi, remap_size, HDMI_VP_REMAP);
586
587 if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_PP) {
588 vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
589 HDMI_VP_CONF_PP_EN_ENABLE |
590 HDMI_VP_CONF_YCC422_EN_DISABLE;
591 } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422) {
592 vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
593 HDMI_VP_CONF_PP_EN_DISABLE |
594 HDMI_VP_CONF_YCC422_EN_ENABLE;
595 } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS) {
596 vp_conf = HDMI_VP_CONF_BYPASS_EN_ENABLE |
597 HDMI_VP_CONF_PP_EN_DISABLE |
598 HDMI_VP_CONF_YCC422_EN_DISABLE;
599 } else {
600 return;
601 }
602
603 hdmi_modb(hdmi, vp_conf,
604 HDMI_VP_CONF_BYPASS_EN_MASK | HDMI_VP_CONF_PP_EN_ENMASK |
605 HDMI_VP_CONF_YCC422_EN_MASK, HDMI_VP_CONF);
606
607 hdmi_modb(hdmi, HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE |
608 HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE,
609 HDMI_VP_STUFF_PP_STUFFING_MASK |
610 HDMI_VP_STUFF_YCC422_STUFFING_MASK, HDMI_VP_STUFF);
611
612 hdmi_modb(hdmi, output_select, HDMI_VP_CONF_OUTPUT_SELECTOR_MASK,
613 HDMI_VP_CONF);
614 }
615
616 static inline void hdmi_phy_test_clear(struct dw_hdmi *hdmi,
617 unsigned char bit)
618 {
619 hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLR_OFFSET,
620 HDMI_PHY_TST0_TSTCLR_MASK, HDMI_PHY_TST0);
621 }
622
623 static inline void hdmi_phy_test_enable(struct dw_hdmi *hdmi,
624 unsigned char bit)
625 {
626 hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTEN_OFFSET,
627 HDMI_PHY_TST0_TSTEN_MASK, HDMI_PHY_TST0);
628 }
629
630 static inline void hdmi_phy_test_clock(struct dw_hdmi *hdmi,
631 unsigned char bit)
632 {
633 hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLK_OFFSET,
634 HDMI_PHY_TST0_TSTCLK_MASK, HDMI_PHY_TST0);
635 }
636
637 static inline void hdmi_phy_test_din(struct dw_hdmi *hdmi,
638 unsigned char bit)
639 {
640 hdmi_writeb(hdmi, bit, HDMI_PHY_TST1);
641 }
642
643 static inline void hdmi_phy_test_dout(struct dw_hdmi *hdmi,
644 unsigned char bit)
645 {
646 hdmi_writeb(hdmi, bit, HDMI_PHY_TST2);
647 }
648
649 static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec)
650 {
651 u32 val;
652
653 while ((val = hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) {
654 if (msec-- == 0)
655 return false;
656 udelay(1000);
657 }
658 hdmi_writeb(hdmi, val, HDMI_IH_I2CMPHY_STAT0);
659
660 return true;
661 }
662
663 static void __hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
664 unsigned char addr)
665 {
666 hdmi_writeb(hdmi, 0xFF, HDMI_IH_I2CMPHY_STAT0);
667 hdmi_writeb(hdmi, addr, HDMI_PHY_I2CM_ADDRESS_ADDR);
668 hdmi_writeb(hdmi, (unsigned char)(data >> 8),
669 HDMI_PHY_I2CM_DATAO_1_ADDR);
670 hdmi_writeb(hdmi, (unsigned char)(data >> 0),
671 HDMI_PHY_I2CM_DATAO_0_ADDR);
672 hdmi_writeb(hdmi, HDMI_PHY_I2CM_OPERATION_ADDR_WRITE,
673 HDMI_PHY_I2CM_OPERATION_ADDR);
674 hdmi_phy_wait_i2c_done(hdmi, 1000);
675 }
676
677 static int hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
678 unsigned char addr)
679 {
680 __hdmi_phy_i2c_write(hdmi, data, addr);
681 return 0;
682 }
683
684 static void dw_hdmi_phy_enable_powerdown(struct dw_hdmi *hdmi, bool enable)
685 {
686 hdmi_mask_writeb(hdmi, !enable, HDMI_PHY_CONF0,
687 HDMI_PHY_CONF0_PDZ_OFFSET,
688 HDMI_PHY_CONF0_PDZ_MASK);
689 }
690
691 static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
692 {
693 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
694 HDMI_PHY_CONF0_ENTMDS_OFFSET,
695 HDMI_PHY_CONF0_ENTMDS_MASK);
696 }
697
698 static void dw_hdmi_phy_enable_spare(struct dw_hdmi *hdmi, u8 enable)
699 {
700 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
701 HDMI_PHY_CONF0_SPARECTRL_OFFSET,
702 HDMI_PHY_CONF0_SPARECTRL_MASK);
703 }
704
705 static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
706 {
707 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
708 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
709 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
710 }
711
712 static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
713 {
714 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
715 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
716 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
717 }
718
719 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
720 {
721 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
722 HDMI_PHY_CONF0_SELDATAENPOL_OFFSET,
723 HDMI_PHY_CONF0_SELDATAENPOL_MASK);
724 }
725
726 static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
727 {
728 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
729 HDMI_PHY_CONF0_SELDIPIF_OFFSET,
730 HDMI_PHY_CONF0_SELDIPIF_MASK);
731 }
732
733 static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
734 unsigned char res, int cscon)
735 {
736 unsigned res_idx;
737 u8 val, msec;
738 const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
739 const struct dw_hdmi_mpll_config *mpll_config = pdata->mpll_cfg;
740 const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr;
741 const struct dw_hdmi_phy_config *phy_config = pdata->phy_config;
742
743 if (prep)
744 return -EINVAL;
745
746 switch (res) {
747 case 0: /* color resolution 0 is 8 bit colour depth */
748 case 8:
749 res_idx = DW_HDMI_RES_8;
750 break;
751 case 10:
752 res_idx = DW_HDMI_RES_10;
753 break;
754 case 12:
755 res_idx = DW_HDMI_RES_12;
756 break;
757 default:
758 return -EINVAL;
759 }
760
761 /* PLL/MPLL Cfg - always match on final entry */
762 for (; mpll_config->mpixelclock != ~0UL; mpll_config++)
763 if (hdmi->hdmi_data.video_mode.mpixelclock <=
764 mpll_config->mpixelclock)
765 break;
766
767 for (; curr_ctrl->mpixelclock != ~0UL; curr_ctrl++)
768 if (hdmi->hdmi_data.video_mode.mpixelclock <=
769 curr_ctrl->mpixelclock)
770 break;
771
772 for (; phy_config->mpixelclock != ~0UL; phy_config++)
773 if (hdmi->hdmi_data.video_mode.mpixelclock <=
774 phy_config->mpixelclock)
775 break;
776
777 if (mpll_config->mpixelclock == ~0UL ||
778 curr_ctrl->mpixelclock == ~0UL ||
779 phy_config->mpixelclock == ~0UL) {
780 dev_err(hdmi->dev, "Pixel clock %d - unsupported by HDMI\n",
781 hdmi->hdmi_data.video_mode.mpixelclock);
782 return -EINVAL;
783 }
784
785 /* Enable csc path */
786 if (cscon)
787 val = HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH;
788 else
789 val = HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS;
790
791 hdmi_writeb(hdmi, val, HDMI_MC_FLOWCTRL);
792
793 /* gen2 tx power off */
794 dw_hdmi_phy_gen2_txpwron(hdmi, 0);
795
796 /* gen2 pddq */
797 dw_hdmi_phy_gen2_pddq(hdmi, 1);
798
799 /* PHY reset */
800 hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_DEASSERT, HDMI_MC_PHYRSTZ);
801 hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_ASSERT, HDMI_MC_PHYRSTZ);
802
803 hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
804
805 hdmi_phy_test_clear(hdmi, 1);
806 hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
807 HDMI_PHY_I2CM_SLAVE_ADDR);
808 hdmi_phy_test_clear(hdmi, 0);
809
810 hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].cpce, 0x06);
811 hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].gmp, 0x15);
812
813 /* CURRCTRL */
814 hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[res_idx], 0x10);
815
816 hdmi_phy_i2c_write(hdmi, 0x0000, 0x13); /* PLLPHBYCTRL */
817 hdmi_phy_i2c_write(hdmi, 0x0006, 0x17);
818
819 hdmi_phy_i2c_write(hdmi, phy_config->term, 0x19); /* TXTERM */
820 hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr, 0x09); /* CKSYMTXCTRL */
821 hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr, 0x0E); /* VLEVCTRL */
822
823 /* REMOVE CLK TERM */
824 hdmi_phy_i2c_write(hdmi, 0x8000, 0x05); /* CKCALCTRL */
825
826 dw_hdmi_phy_enable_powerdown(hdmi, false);
827
828 /* toggle TMDS enable */
829 dw_hdmi_phy_enable_tmds(hdmi, 0);
830 dw_hdmi_phy_enable_tmds(hdmi, 1);
831
832 /* gen2 tx power on */
833 dw_hdmi_phy_gen2_txpwron(hdmi, 1);
834 dw_hdmi_phy_gen2_pddq(hdmi, 0);
835
836 if (hdmi->dev_type == RK3288_HDMI)
837 dw_hdmi_phy_enable_spare(hdmi, 1);
838
839 /*Wait for PHY PLL lock */
840 msec = 5;
841 do {
842 val = hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_TX_PHY_LOCK;
843 if (!val)
844 break;
845
846 if (msec == 0) {
847 dev_err(hdmi->dev, "PHY PLL not locked\n");
848 return -ETIMEDOUT;
849 }
850
851 udelay(1000);
852 msec--;
853 } while (1);
854
855 return 0;
856 }
857
858 static int dw_hdmi_phy_init(struct dw_hdmi *hdmi)
859 {
860 int i, ret;
861 bool cscon;
862
863 /*check csc whether needed activated in HDMI mode */
864 cscon = hdmi->sink_is_hdmi && is_color_space_conversion(hdmi);
865
866 /* HDMI Phy spec says to do the phy initialization sequence twice */
867 for (i = 0; i < 2; i++) {
868 dw_hdmi_phy_sel_data_en_pol(hdmi, 1);
869 dw_hdmi_phy_sel_interface_control(hdmi, 0);
870 dw_hdmi_phy_enable_tmds(hdmi, 0);
871 dw_hdmi_phy_enable_powerdown(hdmi, true);
872
873 /* Enable CSC */
874 ret = hdmi_phy_configure(hdmi, 0, 8, cscon);
875 if (ret)
876 return ret;
877 }
878
879 hdmi->phy_enabled = true;
880 return 0;
881 }
882
883 static void hdmi_tx_hdcp_config(struct dw_hdmi *hdmi)
884 {
885 u8 de;
886
887 if (hdmi->hdmi_data.video_mode.mdataenablepolarity)
888 de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_HIGH;
889 else
890 de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_LOW;
891
892 /* disable rx detect */
893 hdmi_modb(hdmi, HDMI_A_HDCPCFG0_RXDETECT_DISABLE,
894 HDMI_A_HDCPCFG0_RXDETECT_MASK, HDMI_A_HDCPCFG0);
895
896 hdmi_modb(hdmi, de, HDMI_A_VIDPOLCFG_DATAENPOL_MASK, HDMI_A_VIDPOLCFG);
897
898 hdmi_modb(hdmi, HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_DISABLE,
899 HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK, HDMI_A_HDCPCFG1);
900 }
901
902 static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
903 {
904 struct hdmi_avi_infoframe frame;
905 u8 val;
906
907 /* Initialise info frame from DRM mode */
908 drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
909
910 if (hdmi->hdmi_data.enc_out_format == YCBCR444)
911 frame.colorspace = HDMI_COLORSPACE_YUV444;
912 else if (hdmi->hdmi_data.enc_out_format == YCBCR422_8BITS)
913 frame.colorspace = HDMI_COLORSPACE_YUV422;
914 else
915 frame.colorspace = HDMI_COLORSPACE_RGB;
916
917 /* Set up colorimetry */
918 if (hdmi->hdmi_data.enc_out_format == XVYCC444) {
919 frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
920 if (hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_601)
921 frame.extended_colorimetry =
922 HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
923 else /*hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_709*/
924 frame.extended_colorimetry =
925 HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
926 } else if (hdmi->hdmi_data.enc_out_format != RGB) {
927 frame.colorimetry = hdmi->hdmi_data.colorimetry;
928 frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
929 } else { /* Carries no data */
930 frame.colorimetry = HDMI_COLORIMETRY_NONE;
931 frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
932 }
933
934 frame.scan_mode = HDMI_SCAN_MODE_NONE;
935
936 /*
937 * The Designware IP uses a different byte format from standard
938 * AVI info frames, though generally the bits are in the correct
939 * bytes.
940 */
941
942 /*
943 * AVI data byte 1 differences: Colorspace in bits 4,5 rather than 5,6,
944 * active aspect present in bit 6 rather than 4.
945 */
946 val = (frame.colorspace & 3) << 4 | (frame.scan_mode & 0x3);
947 if (frame.active_aspect & 15)
948 val |= HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT;
949 if (frame.top_bar || frame.bottom_bar)
950 val |= HDMI_FC_AVICONF0_BAR_DATA_HORIZ_BAR;
951 if (frame.left_bar || frame.right_bar)
952 val |= HDMI_FC_AVICONF0_BAR_DATA_VERT_BAR;
953 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0);
954
955 /* AVI data byte 2 differences: none */
956 val = ((frame.colorimetry & 0x3) << 6) |
957 ((frame.picture_aspect & 0x3) << 4) |
958 (frame.active_aspect & 0xf);
959 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF1);
960
961 /* AVI data byte 3 differences: none */
962 val = ((frame.extended_colorimetry & 0x7) << 4) |
963 ((frame.quantization_range & 0x3) << 2) |
964 (frame.nups & 0x3);
965 if (frame.itc)
966 val |= HDMI_FC_AVICONF2_IT_CONTENT_VALID;
967 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF2);
968
969 /* AVI data byte 4 differences: none */
970 val = frame.video_code & 0x7f;
971 hdmi_writeb(hdmi, val, HDMI_FC_AVIVID);
972
973 /* AVI Data Byte 5- set up input and output pixel repetition */
974 val = (((hdmi->hdmi_data.video_mode.mpixelrepetitioninput + 1) <<
975 HDMI_FC_PRCONF_INCOMING_PR_FACTOR_OFFSET) &
976 HDMI_FC_PRCONF_INCOMING_PR_FACTOR_MASK) |
977 ((hdmi->hdmi_data.video_mode.mpixelrepetitionoutput <<
978 HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_OFFSET) &
979 HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK);
980 hdmi_writeb(hdmi, val, HDMI_FC_PRCONF);
981
982 /*
983 * AVI data byte 5 differences: content type in 0,1 rather than 4,5,
984 * ycc range in bits 2,3 rather than 6,7
985 */
986 val = ((frame.ycc_quantization_range & 0x3) << 2) |
987 (frame.content_type & 0x3);
988 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF3);
989
990 /* AVI Data Bytes 6-13 */
991 hdmi_writeb(hdmi, frame.top_bar & 0xff, HDMI_FC_AVIETB0);
992 hdmi_writeb(hdmi, (frame.top_bar >> 8) & 0xff, HDMI_FC_AVIETB1);
993 hdmi_writeb(hdmi, frame.bottom_bar & 0xff, HDMI_FC_AVISBB0);
994 hdmi_writeb(hdmi, (frame.bottom_bar >> 8) & 0xff, HDMI_FC_AVISBB1);
995 hdmi_writeb(hdmi, frame.left_bar & 0xff, HDMI_FC_AVIELB0);
996 hdmi_writeb(hdmi, (frame.left_bar >> 8) & 0xff, HDMI_FC_AVIELB1);
997 hdmi_writeb(hdmi, frame.right_bar & 0xff, HDMI_FC_AVISRB0);
998 hdmi_writeb(hdmi, (frame.right_bar >> 8) & 0xff, HDMI_FC_AVISRB1);
999 }
1000
1001 static void hdmi_av_composer(struct dw_hdmi *hdmi,
1002 const struct drm_display_mode *mode)
1003 {
1004 u8 inv_val;
1005 struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode;
1006 int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
1007 unsigned int vdisplay;
1008
1009 vmode->mpixelclock = mode->clock * 1000;
1010
1011 dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
1012
1013 /* Set up HDMI_FC_INVIDCONF */
1014 inv_val = (hdmi->hdmi_data.hdcp_enable ?
1015 HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE :
1016 HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE);
1017
1018 inv_val |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
1019 HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH :
1020 HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW;
1021
1022 inv_val |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
1023 HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH :
1024 HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW;
1025
1026 inv_val |= (vmode->mdataenablepolarity ?
1027 HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH :
1028 HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW);
1029
1030 if (hdmi->vic == 39)
1031 inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH;
1032 else
1033 inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
1034 HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH :
1035 HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW;
1036
1037 inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
1038 HDMI_FC_INVIDCONF_IN_I_P_INTERLACED :
1039 HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE;
1040
1041 inv_val |= hdmi->sink_is_hdmi ?
1042 HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE :
1043 HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE;
1044
1045 hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF);
1046
1047 vdisplay = mode->vdisplay;
1048 vblank = mode->vtotal - mode->vdisplay;
1049 v_de_vs = mode->vsync_start - mode->vdisplay;
1050 vsync_len = mode->vsync_end - mode->vsync_start;
1051
1052 /*
1053 * When we're setting an interlaced mode, we need
1054 * to adjust the vertical timing to suit.
1055 */
1056 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
1057 vdisplay /= 2;
1058 vblank /= 2;
1059 v_de_vs /= 2;
1060 vsync_len /= 2;
1061 }
1062
1063 /* Set up horizontal active pixel width */
1064 hdmi_writeb(hdmi, mode->hdisplay >> 8, HDMI_FC_INHACTV1);
1065 hdmi_writeb(hdmi, mode->hdisplay, HDMI_FC_INHACTV0);
1066
1067 /* Set up vertical active lines */
1068 hdmi_writeb(hdmi, vdisplay >> 8, HDMI_FC_INVACTV1);
1069 hdmi_writeb(hdmi, vdisplay, HDMI_FC_INVACTV0);
1070
1071 /* Set up horizontal blanking pixel region width */
1072 hblank = mode->htotal - mode->hdisplay;
1073 hdmi_writeb(hdmi, hblank >> 8, HDMI_FC_INHBLANK1);
1074 hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0);
1075
1076 /* Set up vertical blanking pixel region width */
1077 hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK);
1078
1079 /* Set up HSYNC active edge delay width (in pixel clks) */
1080 h_de_hs = mode->hsync_start - mode->hdisplay;
1081 hdmi_writeb(hdmi, h_de_hs >> 8, HDMI_FC_HSYNCINDELAY1);
1082 hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0);
1083
1084 /* Set up VSYNC active edge delay (in lines) */
1085 hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY);
1086
1087 /* Set up HSYNC active pulse width (in pixel clks) */
1088 hsync_len = mode->hsync_end - mode->hsync_start;
1089 hdmi_writeb(hdmi, hsync_len >> 8, HDMI_FC_HSYNCINWIDTH1);
1090 hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0);
1091
1092 /* Set up VSYNC active edge delay (in lines) */
1093 hdmi_writeb(hdmi, vsync_len, HDMI_FC_VSYNCINWIDTH);
1094 }
1095
1096 static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi)
1097 {
1098 if (!hdmi->phy_enabled)
1099 return;
1100
1101 dw_hdmi_phy_enable_tmds(hdmi, 0);
1102 dw_hdmi_phy_enable_powerdown(hdmi, true);
1103
1104 hdmi->phy_enabled = false;
1105 }
1106
1107 /* HDMI Initialization Step B.4 */
1108 static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi)
1109 {
1110 u8 clkdis;
1111
1112 /* control period minimum duration */
1113 hdmi_writeb(hdmi, 12, HDMI_FC_CTRLDUR);
1114 hdmi_writeb(hdmi, 32, HDMI_FC_EXCTRLDUR);
1115 hdmi_writeb(hdmi, 1, HDMI_FC_EXCTRLSPAC);
1116
1117 /* Set to fill TMDS data channels */
1118 hdmi_writeb(hdmi, 0x0B, HDMI_FC_CH0PREAM);
1119 hdmi_writeb(hdmi, 0x16, HDMI_FC_CH1PREAM);
1120 hdmi_writeb(hdmi, 0x21, HDMI_FC_CH2PREAM);
1121
1122 /* Enable pixel clock and tmds data path */
1123 clkdis = 0x7F;
1124 clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE;
1125 hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
1126
1127 clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
1128 hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
1129
1130 /* Enable csc path */
1131 if (is_color_space_conversion(hdmi)) {
1132 clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE;
1133 hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
1134 }
1135 }
1136
1137 static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi)
1138 {
1139 hdmi_modb(hdmi, 0, HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS);
1140 }
1141
1142 /* Workaround to clear the overflow condition */
1143 static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
1144 {
1145 int count;
1146 u8 val;
1147
1148 /* TMDS software reset */
1149 hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, HDMI_MC_SWRSTZ);
1150
1151 val = hdmi_readb(hdmi, HDMI_FC_INVIDCONF);
1152 if (hdmi->dev_type == IMX6DL_HDMI) {
1153 hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
1154 return;
1155 }
1156
1157 for (count = 0; count < 4; count++)
1158 hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
1159 }
1160
1161 static void hdmi_enable_overflow_interrupts(struct dw_hdmi *hdmi)
1162 {
1163 hdmi_writeb(hdmi, 0, HDMI_FC_MASK2);
1164 hdmi_writeb(hdmi, 0, HDMI_IH_MUTE_FC_STAT2);
1165 }
1166
1167 static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
1168 {
1169 hdmi_writeb(hdmi, HDMI_IH_MUTE_FC_STAT2_OVERFLOW_MASK,
1170 HDMI_IH_MUTE_FC_STAT2);
1171 }
1172
1173 static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
1174 {
1175 int ret;
1176
1177 hdmi_disable_overflow_interrupts(hdmi);
1178
1179 hdmi->vic = drm_match_cea_mode(mode);
1180
1181 if (!hdmi->vic) {
1182 dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n");
1183 } else {
1184 dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
1185 }
1186
1187 if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
1188 (hdmi->vic == 21) || (hdmi->vic == 22) ||
1189 (hdmi->vic == 2) || (hdmi->vic == 3) ||
1190 (hdmi->vic == 17) || (hdmi->vic == 18))
1191 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
1192 else
1193 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
1194
1195 hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
1196 hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
1197
1198 /* TODO: Get input format from IPU (via FB driver interface) */
1199 hdmi->hdmi_data.enc_in_format = RGB;
1200
1201 hdmi->hdmi_data.enc_out_format = RGB;
1202
1203 hdmi->hdmi_data.enc_color_depth = 8;
1204 hdmi->hdmi_data.pix_repet_factor = 0;
1205 hdmi->hdmi_data.hdcp_enable = 0;
1206 hdmi->hdmi_data.video_mode.mdataenablepolarity = true;
1207
1208 /* HDMI Initialization Step B.1 */
1209 hdmi_av_composer(hdmi, mode);
1210
1211 /* HDMI Initializateion Step B.2 */
1212 ret = dw_hdmi_phy_init(hdmi);
1213 if (ret)
1214 return ret;
1215
1216 /* HDMI Initialization Step B.3 */
1217 dw_hdmi_enable_video_path(hdmi);
1218
1219 if (hdmi->sink_has_audio) {
1220 dev_dbg(hdmi->dev, "sink has audio support\n");
1221
1222 /* HDMI Initialization Step E - Configure audio */
1223 hdmi_clk_regenerator_update_pixel_clock(hdmi);
1224 hdmi_enable_audio_clk(hdmi);
1225 }
1226
1227 /* not for DVI mode */
1228 if (hdmi->sink_is_hdmi) {
1229 dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__);
1230
1231 /* HDMI Initialization Step F - Configure AVI InfoFrame */
1232 hdmi_config_AVI(hdmi, mode);
1233 } else {
1234 dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
1235 }
1236
1237 hdmi_video_packetize(hdmi);
1238 hdmi_video_csc(hdmi);
1239 hdmi_video_sample(hdmi);
1240 hdmi_tx_hdcp_config(hdmi);
1241
1242 dw_hdmi_clear_overflow(hdmi);
1243 if (hdmi->cable_plugin && hdmi->sink_is_hdmi)
1244 hdmi_enable_overflow_interrupts(hdmi);
1245
1246 return 0;
1247 }
1248
1249 /* Wait until we are registered to enable interrupts */
1250 static int dw_hdmi_fb_registered(struct dw_hdmi *hdmi)
1251 {
1252 hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL,
1253 HDMI_PHY_I2CM_INT_ADDR);
1254
1255 hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL |
1256 HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL,
1257 HDMI_PHY_I2CM_CTLINT_ADDR);
1258
1259 /* enable cable hot plug irq */
1260 hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
1261
1262 /* Clear Hotplug interrupts */
1263 hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
1264 HDMI_IH_PHY_STAT0);
1265
1266 return 0;
1267 }
1268
1269 static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
1270 {
1271 u8 ih_mute;
1272
1273 /*
1274 * Boot up defaults are:
1275 * HDMI_IH_MUTE = 0x03 (disabled)
1276 * HDMI_IH_MUTE_* = 0x00 (enabled)
1277 *
1278 * Disable top level interrupt bits in HDMI block
1279 */
1280 ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) |
1281 HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
1282 HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
1283
1284 hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
1285
1286 /* by default mask all interrupts */
1287 hdmi_writeb(hdmi, 0xff, HDMI_VP_MASK);
1288 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK0);
1289 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK1);
1290 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK2);
1291 hdmi_writeb(hdmi, 0xff, HDMI_PHY_MASK0);
1292 hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_INT_ADDR);
1293 hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_CTLINT_ADDR);
1294 hdmi_writeb(hdmi, 0xff, HDMI_AUD_INT);
1295 hdmi_writeb(hdmi, 0xff, HDMI_AUD_SPDIFINT);
1296 hdmi_writeb(hdmi, 0xff, HDMI_AUD_HBR_MASK);
1297 hdmi_writeb(hdmi, 0xff, HDMI_GP_MASK);
1298 hdmi_writeb(hdmi, 0xff, HDMI_A_APIINTMSK);
1299 hdmi_writeb(hdmi, 0xff, HDMI_CEC_MASK);
1300 hdmi_writeb(hdmi, 0xff, HDMI_I2CM_INT);
1301 hdmi_writeb(hdmi, 0xff, HDMI_I2CM_CTLINT);
1302
1303 /* Disable interrupts in the IH_MUTE_* registers */
1304 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT0);
1305 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT1);
1306 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT2);
1307 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AS_STAT0);
1308 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_PHY_STAT0);
1309 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CM_STAT0);
1310 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_CEC_STAT0);
1311 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_VP_STAT0);
1312 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CMPHY_STAT0);
1313 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
1314
1315 /* Enable top level interrupt bits in HDMI block */
1316 ih_mute &= ~(HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
1317 HDMI_IH_MUTE_MUTE_ALL_INTERRUPT);
1318 hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
1319 }
1320
1321 static void dw_hdmi_poweron(struct dw_hdmi *hdmi)
1322 {
1323 hdmi->bridge_is_on = true;
1324 dw_hdmi_setup(hdmi, &hdmi->previous_mode);
1325 }
1326
1327 static void dw_hdmi_poweroff(struct dw_hdmi *hdmi)
1328 {
1329 dw_hdmi_phy_disable(hdmi);
1330 hdmi->bridge_is_on = false;
1331 }
1332
1333 static void dw_hdmi_update_power(struct dw_hdmi *hdmi)
1334 {
1335 int force = hdmi->force;
1336
1337 if (hdmi->disabled) {
1338 force = DRM_FORCE_OFF;
1339 } else if (force == DRM_FORCE_UNSPECIFIED) {
1340 if (hdmi->rxsense)
1341 force = DRM_FORCE_ON;
1342 else
1343 force = DRM_FORCE_OFF;
1344 }
1345
1346 if (force == DRM_FORCE_OFF) {
1347 if (hdmi->bridge_is_on)
1348 dw_hdmi_poweroff(hdmi);
1349 } else {
1350 if (!hdmi->bridge_is_on)
1351 dw_hdmi_poweron(hdmi);
1352 }
1353 }
1354
1355 /*
1356 * Adjust the detection of RXSENSE according to whether we have a forced
1357 * connection mode enabled, or whether we have been disabled. There is
1358 * no point processing RXSENSE interrupts if we have a forced connection
1359 * state, or DRM has us disabled.
1360 *
1361 * We also disable rxsense interrupts when we think we're disconnected
1362 * to avoid floating TDMS signals giving false rxsense interrupts.
1363 *
1364 * Note: we still need to listen for HPD interrupts even when DRM has us
1365 * disabled so that we can detect a connect event.
1366 */
1367 static void dw_hdmi_update_phy_mask(struct dw_hdmi *hdmi)
1368 {
1369 u8 old_mask = hdmi->phy_mask;
1370
1371 if (hdmi->force || hdmi->disabled || !hdmi->rxsense)
1372 hdmi->phy_mask |= HDMI_PHY_RX_SENSE;
1373 else
1374 hdmi->phy_mask &= ~HDMI_PHY_RX_SENSE;
1375
1376 if (old_mask != hdmi->phy_mask)
1377 hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
1378 }
1379
1380 static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
1381 struct drm_display_mode *orig_mode,
1382 struct drm_display_mode *mode)
1383 {
1384 struct dw_hdmi *hdmi = bridge->driver_private;
1385
1386 mutex_lock(&hdmi->mutex);
1387
1388 /* Store the display mode for plugin/DKMS poweron events */
1389 memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode));
1390
1391 mutex_unlock(&hdmi->mutex);
1392 }
1393
1394 static void dw_hdmi_bridge_disable(struct drm_bridge *bridge)
1395 {
1396 struct dw_hdmi *hdmi = bridge->driver_private;
1397
1398 mutex_lock(&hdmi->mutex);
1399 hdmi->disabled = true;
1400 dw_hdmi_update_power(hdmi);
1401 dw_hdmi_update_phy_mask(hdmi);
1402 mutex_unlock(&hdmi->mutex);
1403 }
1404
1405 static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
1406 {
1407 struct dw_hdmi *hdmi = bridge->driver_private;
1408
1409 mutex_lock(&hdmi->mutex);
1410 hdmi->disabled = false;
1411 dw_hdmi_update_power(hdmi);
1412 dw_hdmi_update_phy_mask(hdmi);
1413 mutex_unlock(&hdmi->mutex);
1414 }
1415
1416 static enum drm_connector_status
1417 dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
1418 {
1419 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1420 connector);
1421
1422 mutex_lock(&hdmi->mutex);
1423 hdmi->force = DRM_FORCE_UNSPECIFIED;
1424 dw_hdmi_update_power(hdmi);
1425 dw_hdmi_update_phy_mask(hdmi);
1426 mutex_unlock(&hdmi->mutex);
1427
1428 return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
1429 connector_status_connected : connector_status_disconnected;
1430 }
1431
1432 static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
1433 {
1434 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1435 connector);
1436 struct edid *edid;
1437 int ret = 0;
1438
1439 if (!hdmi->ddc)
1440 return 0;
1441
1442 edid = drm_get_edid(connector, hdmi->ddc);
1443 if (edid) {
1444 dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
1445 edid->width_cm, edid->height_cm);
1446
1447 hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
1448 hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
1449 drm_mode_connector_update_edid_property(connector, edid);
1450 ret = drm_add_edid_modes(connector, edid);
1451 /* Store the ELD */
1452 drm_edid_to_eld(connector, edid);
1453 kfree(edid);
1454 } else {
1455 dev_dbg(hdmi->dev, "failed to get edid\n");
1456 }
1457
1458 return ret;
1459 }
1460
1461 static enum drm_mode_status
1462 dw_hdmi_connector_mode_valid(struct drm_connector *connector,
1463 struct drm_display_mode *mode)
1464 {
1465 struct dw_hdmi *hdmi = container_of(connector,
1466 struct dw_hdmi, connector);
1467 enum drm_mode_status mode_status = MODE_OK;
1468
1469 /* We don't support double-clocked modes */
1470 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
1471 return MODE_BAD;
1472
1473 if (hdmi->plat_data->mode_valid)
1474 mode_status = hdmi->plat_data->mode_valid(connector, mode);
1475
1476 return mode_status;
1477 }
1478
1479 static void dw_hdmi_connector_destroy(struct drm_connector *connector)
1480 {
1481 drm_connector_unregister(connector);
1482 drm_connector_cleanup(connector);
1483 }
1484
1485 static void dw_hdmi_connector_force(struct drm_connector *connector)
1486 {
1487 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1488 connector);
1489
1490 mutex_lock(&hdmi->mutex);
1491 hdmi->force = connector->force;
1492 dw_hdmi_update_power(hdmi);
1493 dw_hdmi_update_phy_mask(hdmi);
1494 mutex_unlock(&hdmi->mutex);
1495 }
1496
1497 static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
1498 .dpms = drm_atomic_helper_connector_dpms,
1499 .fill_modes = drm_helper_probe_single_connector_modes,
1500 .detect = dw_hdmi_connector_detect,
1501 .destroy = dw_hdmi_connector_destroy,
1502 .force = dw_hdmi_connector_force,
1503 .reset = drm_atomic_helper_connector_reset,
1504 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
1505 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
1506 };
1507
1508 static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
1509 .get_modes = dw_hdmi_connector_get_modes,
1510 .mode_valid = dw_hdmi_connector_mode_valid,
1511 .best_encoder = drm_atomic_helper_best_encoder,
1512 };
1513
1514 static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
1515 .enable = dw_hdmi_bridge_enable,
1516 .disable = dw_hdmi_bridge_disable,
1517 .mode_set = dw_hdmi_bridge_mode_set,
1518 };
1519
1520 static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id)
1521 {
1522 struct dw_hdmi *hdmi = dev_id;
1523 u8 intr_stat;
1524
1525 intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
1526 if (intr_stat)
1527 hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
1528
1529 return intr_stat ? IRQ_WAKE_THREAD : IRQ_NONE;
1530 }
1531
1532 static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
1533 {
1534 struct dw_hdmi *hdmi = dev_id;
1535 u8 intr_stat, phy_int_pol, phy_pol_mask, phy_stat;
1536
1537 intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
1538 phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0);
1539 phy_stat = hdmi_readb(hdmi, HDMI_PHY_STAT0);
1540
1541 phy_pol_mask = 0;
1542 if (intr_stat & HDMI_IH_PHY_STAT0_HPD)
1543 phy_pol_mask |= HDMI_PHY_HPD;
1544 if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE0)
1545 phy_pol_mask |= HDMI_PHY_RX_SENSE0;
1546 if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE1)
1547 phy_pol_mask |= HDMI_PHY_RX_SENSE1;
1548 if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE2)
1549 phy_pol_mask |= HDMI_PHY_RX_SENSE2;
1550 if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE3)
1551 phy_pol_mask |= HDMI_PHY_RX_SENSE3;
1552
1553 if (phy_pol_mask)
1554 hdmi_modb(hdmi, ~phy_int_pol, phy_pol_mask, HDMI_PHY_POL0);
1555
1556 /*
1557 * RX sense tells us whether the TDMS transmitters are detecting
1558 * load - in other words, there's something listening on the
1559 * other end of the link. Use this to decide whether we should
1560 * power on the phy as HPD may be toggled by the sink to merely
1561 * ask the source to re-read the EDID.
1562 */
1563 if (intr_stat &
1564 (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD)) {
1565 mutex_lock(&hdmi->mutex);
1566 if (!hdmi->disabled && !hdmi->force) {
1567 /*
1568 * If the RX sense status indicates we're disconnected,
1569 * clear the software rxsense status.
1570 */
1571 if (!(phy_stat & HDMI_PHY_RX_SENSE))
1572 hdmi->rxsense = false;
1573
1574 /*
1575 * Only set the software rxsense status when both
1576 * rxsense and hpd indicates we're connected.
1577 * This avoids what seems to be bad behaviour in
1578 * at least iMX6S versions of the phy.
1579 */
1580 if (phy_stat & HDMI_PHY_HPD)
1581 hdmi->rxsense = true;
1582
1583 dw_hdmi_update_power(hdmi);
1584 dw_hdmi_update_phy_mask(hdmi);
1585 }
1586 mutex_unlock(&hdmi->mutex);
1587 }
1588
1589 if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
1590 dev_dbg(hdmi->dev, "EVENT=%s\n",
1591 phy_int_pol & HDMI_PHY_HPD ? "plugin" : "plugout");
1592 drm_helper_hpd_irq_event(hdmi->bridge->dev);
1593 }
1594
1595 hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);
1596 hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
1597 HDMI_IH_MUTE_PHY_STAT0);
1598
1599 return IRQ_HANDLED;
1600 }
1601
1602 static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi)
1603 {
1604 struct drm_encoder *encoder = hdmi->encoder;
1605 struct drm_bridge *bridge;
1606 int ret;
1607
1608 bridge = devm_kzalloc(drm->dev, sizeof(*bridge), GFP_KERNEL);
1609 if (!bridge) {
1610 DRM_ERROR("Failed to allocate drm bridge\n");
1611 return -ENOMEM;
1612 }
1613
1614 hdmi->bridge = bridge;
1615 bridge->driver_private = hdmi;
1616 bridge->funcs = &dw_hdmi_bridge_funcs;
1617 ret = drm_bridge_attach(drm, bridge);
1618 if (ret) {
1619 DRM_ERROR("Failed to initialize bridge with drm\n");
1620 return -EINVAL;
1621 }
1622
1623 encoder->bridge = bridge;
1624 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
1625
1626 drm_connector_helper_add(&hdmi->connector,
1627 &dw_hdmi_connector_helper_funcs);
1628
1629 drm_connector_init(drm, &hdmi->connector,
1630 &dw_hdmi_connector_funcs,
1631 DRM_MODE_CONNECTOR_HDMIA);
1632
1633 drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
1634
1635 return 0;
1636 }
1637
1638 int dw_hdmi_bind(struct device *dev, struct device *master,
1639 void *data, struct drm_encoder *encoder,
1640 struct resource *iores, int irq,
1641 const struct dw_hdmi_plat_data *plat_data)
1642 {
1643 struct drm_device *drm = data;
1644 struct device_node *np = dev->of_node;
1645 struct platform_device_info pdevinfo;
1646 struct device_node *ddc_node;
1647 struct dw_hdmi_audio_data audio;
1648 struct dw_hdmi *hdmi;
1649 int ret;
1650 u32 val = 1;
1651
1652 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1653 if (!hdmi)
1654 return -ENOMEM;
1655
1656 hdmi->connector.interlace_allowed = 1;
1657
1658 hdmi->plat_data = plat_data;
1659 hdmi->dev = dev;
1660 hdmi->dev_type = plat_data->dev_type;
1661 hdmi->sample_rate = 48000;
1662 hdmi->encoder = encoder;
1663 hdmi->disabled = true;
1664 hdmi->rxsense = true;
1665 hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
1666
1667 mutex_init(&hdmi->mutex);
1668 mutex_init(&hdmi->audio_mutex);
1669 spin_lock_init(&hdmi->audio_lock);
1670
1671 of_property_read_u32(np, "reg-io-width", &val);
1672
1673 switch (val) {
1674 case 4:
1675 hdmi->write = dw_hdmi_writel;
1676 hdmi->read = dw_hdmi_readl;
1677 break;
1678 case 1:
1679 hdmi->write = dw_hdmi_writeb;
1680 hdmi->read = dw_hdmi_readb;
1681 break;
1682 default:
1683 dev_err(dev, "reg-io-width must be 1 or 4\n");
1684 return -EINVAL;
1685 }
1686
1687 ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
1688 if (ddc_node) {
1689 hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
1690 of_node_put(ddc_node);
1691 if (!hdmi->ddc) {
1692 dev_dbg(hdmi->dev, "failed to read ddc node\n");
1693 return -EPROBE_DEFER;
1694 }
1695
1696 } else {
1697 dev_dbg(hdmi->dev, "no ddc property found\n");
1698 }
1699
1700 hdmi->regs = devm_ioremap_resource(dev, iores);
1701 if (IS_ERR(hdmi->regs))
1702 return PTR_ERR(hdmi->regs);
1703
1704 hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
1705 if (IS_ERR(hdmi->isfr_clk)) {
1706 ret = PTR_ERR(hdmi->isfr_clk);
1707 dev_err(hdmi->dev, "Unable to get HDMI isfr clk: %d\n", ret);
1708 return ret;
1709 }
1710
1711 ret = clk_prepare_enable(hdmi->isfr_clk);
1712 if (ret) {
1713 dev_err(hdmi->dev, "Cannot enable HDMI isfr clock: %d\n", ret);
1714 return ret;
1715 }
1716
1717 hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb");
1718 if (IS_ERR(hdmi->iahb_clk)) {
1719 ret = PTR_ERR(hdmi->iahb_clk);
1720 dev_err(hdmi->dev, "Unable to get HDMI iahb clk: %d\n", ret);
1721 goto err_isfr;
1722 }
1723
1724 ret = clk_prepare_enable(hdmi->iahb_clk);
1725 if (ret) {
1726 dev_err(hdmi->dev, "Cannot enable HDMI iahb clock: %d\n", ret);
1727 goto err_isfr;
1728 }
1729
1730 /* Product and revision IDs */
1731 dev_info(dev,
1732 "Detected HDMI controller 0x%x:0x%x:0x%x:0x%x\n",
1733 hdmi_readb(hdmi, HDMI_DESIGN_ID),
1734 hdmi_readb(hdmi, HDMI_REVISION_ID),
1735 hdmi_readb(hdmi, HDMI_PRODUCT_ID0),
1736 hdmi_readb(hdmi, HDMI_PRODUCT_ID1));
1737
1738 initialize_hdmi_ih_mutes(hdmi);
1739
1740 ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
1741 dw_hdmi_irq, IRQF_SHARED,
1742 dev_name(dev), hdmi);
1743 if (ret)
1744 goto err_iahb;
1745
1746 /*
1747 * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
1748 * N and cts values before enabling phy
1749 */
1750 hdmi_init_clk_regenerator(hdmi);
1751
1752 /*
1753 * Configure registers related to HDMI interrupt
1754 * generation before registering IRQ.
1755 */
1756 hdmi_writeb(hdmi, HDMI_PHY_HPD | HDMI_PHY_RX_SENSE, HDMI_PHY_POL0);
1757
1758 /* Clear Hotplug interrupts */
1759 hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
1760 HDMI_IH_PHY_STAT0);
1761
1762 ret = dw_hdmi_fb_registered(hdmi);
1763 if (ret)
1764 goto err_iahb;
1765
1766 ret = dw_hdmi_register(drm, hdmi);
1767 if (ret)
1768 goto err_iahb;
1769
1770 /* Unmute interrupts */
1771 hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
1772 HDMI_IH_MUTE_PHY_STAT0);
1773
1774 memset(&pdevinfo, 0, sizeof(pdevinfo));
1775 pdevinfo.parent = dev;
1776 pdevinfo.id = PLATFORM_DEVID_AUTO;
1777
1778 if (hdmi_readb(hdmi, HDMI_CONFIG1_ID) & HDMI_CONFIG1_AHB) {
1779 audio.phys = iores->start;
1780 audio.base = hdmi->regs;
1781 audio.irq = irq;
1782 audio.hdmi = hdmi;
1783 audio.eld = hdmi->connector.eld;
1784
1785 pdevinfo.name = "dw-hdmi-ahb-audio";
1786 pdevinfo.data = &audio;
1787 pdevinfo.size_data = sizeof(audio);
1788 pdevinfo.dma_mask = DMA_BIT_MASK(32);
1789 hdmi->audio = platform_device_register_full(&pdevinfo);
1790 }
1791
1792 dev_set_drvdata(dev, hdmi);
1793
1794 return 0;
1795
1796 err_iahb:
1797 clk_disable_unprepare(hdmi->iahb_clk);
1798 err_isfr:
1799 clk_disable_unprepare(hdmi->isfr_clk);
1800
1801 return ret;
1802 }
1803 EXPORT_SYMBOL_GPL(dw_hdmi_bind);
1804
1805 void dw_hdmi_unbind(struct device *dev, struct device *master, void *data)
1806 {
1807 struct dw_hdmi *hdmi = dev_get_drvdata(dev);
1808
1809 if (hdmi->audio && !IS_ERR(hdmi->audio))
1810 platform_device_unregister(hdmi->audio);
1811
1812 /* Disable all interrupts */
1813 hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
1814
1815 hdmi->connector.funcs->destroy(&hdmi->connector);
1816 hdmi->encoder->funcs->destroy(hdmi->encoder);
1817
1818 clk_disable_unprepare(hdmi->iahb_clk);
1819 clk_disable_unprepare(hdmi->isfr_clk);
1820 i2c_put_adapter(hdmi->ddc);
1821 }
1822 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
1823
1824 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
1825 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
1826 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
1827 MODULE_DESCRIPTION("DW HDMI transmitter driver");
1828 MODULE_LICENSE("GPL");
1829 MODULE_ALIAS("platform:dw-hdmi");
Linux kernel - Deliverables
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