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
22 #include <drm/drm_of.h>
23 #include <drm/drmP.h>
24 #include <drm/drm_crtc_helper.h>
25 #include <drm/drm_edid.h>
26 #include <drm/drm_encoder_slave.h>
27 #include <drm/bridge/dw_hdmi.h>
28
29 #include "dw_hdmi.h"
30
31 #define HDMI_EDID_LEN 512
32
33 #define RGB 0
34 #define YCBCR444 1
35 #define YCBCR422_16BITS 2
36 #define YCBCR422_8BITS 3
37 #define XVYCC444 4
38
39 enum hdmi_datamap {
40 RGB444_8B = 0x01,
41 RGB444_10B = 0x03,
42 RGB444_12B = 0x05,
43 RGB444_16B = 0x07,
44 YCbCr444_8B = 0x09,
45 YCbCr444_10B = 0x0B,
46 YCbCr444_12B = 0x0D,
47 YCbCr444_16B = 0x0F,
48 YCbCr422_8B = 0x16,
49 YCbCr422_10B = 0x14,
50 YCbCr422_12B = 0x12,
51 };
52
53 static const u16 csc_coeff_default[3][4] = {
54 { 0x2000, 0x0000, 0x0000, 0x0000 },
55 { 0x0000, 0x2000, 0x0000, 0x0000 },
56 { 0x0000, 0x0000, 0x2000, 0x0000 }
57 };
58
59 static const u16 csc_coeff_rgb_out_eitu601[3][4] = {
60 { 0x2000, 0x6926, 0x74fd, 0x010e },
61 { 0x2000, 0x2cdd, 0x0000, 0x7e9a },
62 { 0x2000, 0x0000, 0x38b4, 0x7e3b }
63 };
64
65 static const u16 csc_coeff_rgb_out_eitu709[3][4] = {
66 { 0x2000, 0x7106, 0x7a02, 0x00a7 },
67 { 0x2000, 0x3264, 0x0000, 0x7e6d },
68 { 0x2000, 0x0000, 0x3b61, 0x7e25 }
69 };
70
71 static const u16 csc_coeff_rgb_in_eitu601[3][4] = {
72 { 0x2591, 0x1322, 0x074b, 0x0000 },
73 { 0x6535, 0x2000, 0x7acc, 0x0200 },
74 { 0x6acd, 0x7534, 0x2000, 0x0200 }
75 };
76
77 static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
78 { 0x2dc5, 0x0d9b, 0x049e, 0x0000 },
79 { 0x62f0, 0x2000, 0x7d11, 0x0200 },
80 { 0x6756, 0x78ab, 0x2000, 0x0200 }
81 };
82
83 struct hdmi_vmode {
84 bool mdvi;
85 bool mhsyncpolarity;
86 bool mvsyncpolarity;
87 bool minterlaced;
88 bool mdataenablepolarity;
89
90 unsigned int mpixelclock;
91 unsigned int mpixelrepetitioninput;
92 unsigned int mpixelrepetitionoutput;
93 };
94
95 struct hdmi_data_info {
96 unsigned int enc_in_format;
97 unsigned int enc_out_format;
98 unsigned int enc_color_depth;
99 unsigned int colorimetry;
100 unsigned int pix_repet_factor;
101 unsigned int hdcp_enable;
102 struct hdmi_vmode video_mode;
103 };
104
105 struct dw_hdmi {
106 struct drm_connector connector;
107 struct drm_encoder *encoder;
108 struct drm_bridge *bridge;
109
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 regmap *regmap;
127 struct i2c_adapter *ddc;
128 void __iomem *regs;
129
130 struct mutex audio_mutex;
131 unsigned int sample_rate;
132 int ratio;
133
134 void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
135 u8 (*read)(struct dw_hdmi *hdmi, int offset);
136 };
137
dw_hdmi_writel(struct dw_hdmi * hdmi,u8 val,int offset)138 static void dw_hdmi_writel(struct dw_hdmi *hdmi, u8 val, int offset)
139 {
140 writel(val, hdmi->regs + (offset << 2));
141 }
142
dw_hdmi_readl(struct dw_hdmi * hdmi,int offset)143 static u8 dw_hdmi_readl(struct dw_hdmi *hdmi, int offset)
144 {
145 return readl(hdmi->regs + (offset << 2));
146 }
147
dw_hdmi_writeb(struct dw_hdmi * hdmi,u8 val,int offset)148 static void dw_hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
149 {
150 writeb(val, hdmi->regs + offset);
151 }
152
dw_hdmi_readb(struct dw_hdmi * hdmi,int offset)153 static u8 dw_hdmi_readb(struct dw_hdmi *hdmi, int offset)
154 {
155 return readb(hdmi->regs + offset);
156 }
157
hdmi_writeb(struct dw_hdmi * hdmi,u8 val,int offset)158 static inline void hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
159 {
160 hdmi->write(hdmi, val, offset);
161 }
162
hdmi_readb(struct dw_hdmi * hdmi,int offset)163 static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
164 {
165 return hdmi->read(hdmi, offset);
166 }
167
hdmi_modb(struct dw_hdmi * hdmi,u8 data,u8 mask,unsigned reg)168 static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
169 {
170 u8 val = hdmi_readb(hdmi, reg) & ~mask;
171
172 val |= data & mask;
173 hdmi_writeb(hdmi, val, reg);
174 }
175
hdmi_mask_writeb(struct dw_hdmi * hdmi,u8 data,unsigned int reg,u8 shift,u8 mask)176 static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg,
177 u8 shift, u8 mask)
178 {
179 hdmi_modb(hdmi, data << shift, mask, reg);
180 }
181
hdmi_set_cts_n(struct dw_hdmi * hdmi,unsigned int cts,unsigned int n)182 static void hdmi_set_cts_n(struct dw_hdmi *hdmi, unsigned int cts,
183 unsigned int n)
184 {
185 /* Must be set/cleared first */
186 hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
187
188 /* nshift factor = 0 */
189 hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_N_SHIFT_MASK, HDMI_AUD_CTS3);
190
191 hdmi_writeb(hdmi, ((cts >> 16) & HDMI_AUD_CTS3_AUDCTS19_16_MASK) |
192 HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
193 hdmi_writeb(hdmi, (cts >> 8) & 0xff, HDMI_AUD_CTS2);
194 hdmi_writeb(hdmi, cts & 0xff, HDMI_AUD_CTS1);
195
196 hdmi_writeb(hdmi, (n >> 16) & 0x0f, HDMI_AUD_N3);
197 hdmi_writeb(hdmi, (n >> 8) & 0xff, HDMI_AUD_N2);
198 hdmi_writeb(hdmi, n & 0xff, HDMI_AUD_N1);
199 }
200
hdmi_compute_n(unsigned int freq,unsigned long pixel_clk,unsigned int ratio)201 static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk,
202 unsigned int ratio)
203 {
204 unsigned int n = (128 * freq) / 1000;
205
206 switch (freq) {
207 case 32000:
208 if (pixel_clk == 25170000)
209 n = (ratio == 150) ? 9152 : 4576;
210 else if (pixel_clk == 27020000)
211 n = (ratio == 150) ? 8192 : 4096;
212 else if (pixel_clk == 74170000 || pixel_clk == 148350000)
213 n = 11648;
214 else
215 n = 4096;
216 break;
217
218 case 44100:
219 if (pixel_clk == 25170000)
220 n = 7007;
221 else if (pixel_clk == 74170000)
222 n = 17836;
223 else if (pixel_clk == 148350000)
224 n = (ratio == 150) ? 17836 : 8918;
225 else
226 n = 6272;
227 break;
228
229 case 48000:
230 if (pixel_clk == 25170000)
231 n = (ratio == 150) ? 9152 : 6864;
232 else if (pixel_clk == 27020000)
233 n = (ratio == 150) ? 8192 : 6144;
234 else if (pixel_clk == 74170000)
235 n = 11648;
236 else if (pixel_clk == 148350000)
237 n = (ratio == 150) ? 11648 : 5824;
238 else
239 n = 6144;
240 break;
241
242 case 88200:
243 n = hdmi_compute_n(44100, pixel_clk, ratio) * 2;
244 break;
245
246 case 96000:
247 n = hdmi_compute_n(48000, pixel_clk, ratio) * 2;
248 break;
249
250 case 176400:
251 n = hdmi_compute_n(44100, pixel_clk, ratio) * 4;
252 break;
253
254 case 192000:
255 n = hdmi_compute_n(48000, pixel_clk, ratio) * 4;
256 break;
257
258 default:
259 break;
260 }
261
262 return n;
263 }
264
hdmi_compute_cts(unsigned int freq,unsigned long pixel_clk,unsigned int ratio)265 static unsigned int hdmi_compute_cts(unsigned int freq, unsigned long pixel_clk,
266 unsigned int ratio)
267 {
268 unsigned int cts = 0;
269
270 pr_debug("%s: freq: %d pixel_clk: %ld ratio: %d\n", __func__, freq,
271 pixel_clk, ratio);
272
273 switch (freq) {
274 case 32000:
275 if (pixel_clk == 297000000) {
276 cts = 222750;
277 break;
278 }
279 case 48000:
280 case 96000:
281 case 192000:
282 switch (pixel_clk) {
283 case 25200000:
284 case 27000000:
285 case 54000000:
286 case 74250000:
287 case 148500000:
288 cts = pixel_clk / 1000;
289 break;
290 case 297000000:
291 cts = 247500;
292 break;
293 /*
294 * All other TMDS clocks are not supported by
295 * DWC_hdmi_tx. The TMDS clocks divided or
296 * multiplied by 1,001 coefficients are not
297 * supported.
298 */
299 default:
300 break;
301 }
302 break;
303 case 44100:
304 case 88200:
305 case 176400:
306 switch (pixel_clk) {
307 case 25200000:
308 cts = 28000;
309 break;
310 case 27000000:
311 cts = 30000;
312 break;
313 case 54000000:
314 cts = 60000;
315 break;
316 case 74250000:
317 cts = 82500;
318 break;
319 case 148500000:
320 cts = 165000;
321 break;
322 case 297000000:
323 cts = 247500;
324 break;
325 default:
326 break;
327 }
328 break;
329 default:
330 break;
331 }
332 if (ratio == 100)
333 return cts;
334 return (cts * ratio) / 100;
335 }
336
hdmi_set_clk_regenerator(struct dw_hdmi * hdmi,unsigned long pixel_clk)337 static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
338 unsigned long pixel_clk)
339 {
340 unsigned int clk_n, clk_cts;
341
342 clk_n = hdmi_compute_n(hdmi->sample_rate, pixel_clk,
343 hdmi->ratio);
344 clk_cts = hdmi_compute_cts(hdmi->sample_rate, pixel_clk,
345 hdmi->ratio);
346
347 if (!clk_cts) {
348 dev_dbg(hdmi->dev, "%s: pixel clock not supported: %lu\n",
349 __func__, pixel_clk);
350 return;
351 }
352
353 dev_dbg(hdmi->dev, "%s: samplerate=%d ratio=%d pixelclk=%lu N=%d cts=%d\n",
354 __func__, hdmi->sample_rate, hdmi->ratio,
355 pixel_clk, clk_n, clk_cts);
356
357 hdmi_set_cts_n(hdmi, clk_cts, clk_n);
358 }
359
hdmi_init_clk_regenerator(struct dw_hdmi * hdmi)360 static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
361 {
362 mutex_lock(&hdmi->audio_mutex);
363 hdmi_set_clk_regenerator(hdmi, 74250000);
364 mutex_unlock(&hdmi->audio_mutex);
365 }
366
hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi * hdmi)367 static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
368 {
369 mutex_lock(&hdmi->audio_mutex);
370 hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock);
371 mutex_unlock(&hdmi->audio_mutex);
372 }
373
374 /*
375 * this submodule is responsible for the video data synchronization.
376 * for example, for RGB 4:4:4 input, the data map is defined as
377 * pin{47~40} <==> R[7:0]
378 * pin{31~24} <==> G[7:0]
379 * pin{15~8} <==> B[7:0]
380 */
hdmi_video_sample(struct dw_hdmi * hdmi)381 static void hdmi_video_sample(struct dw_hdmi *hdmi)
382 {
383 int color_format = 0;
384 u8 val;
385
386 if (hdmi->hdmi_data.enc_in_format == RGB) {
387 if (hdmi->hdmi_data.enc_color_depth == 8)
388 color_format = 0x01;
389 else if (hdmi->hdmi_data.enc_color_depth == 10)
390 color_format = 0x03;
391 else if (hdmi->hdmi_data.enc_color_depth == 12)
392 color_format = 0x05;
393 else if (hdmi->hdmi_data.enc_color_depth == 16)
394 color_format = 0x07;
395 else
396 return;
397 } else if (hdmi->hdmi_data.enc_in_format == YCBCR444) {
398 if (hdmi->hdmi_data.enc_color_depth == 8)
399 color_format = 0x09;
400 else if (hdmi->hdmi_data.enc_color_depth == 10)
401 color_format = 0x0B;
402 else if (hdmi->hdmi_data.enc_color_depth == 12)
403 color_format = 0x0D;
404 else if (hdmi->hdmi_data.enc_color_depth == 16)
405 color_format = 0x0F;
406 else
407 return;
408 } else if (hdmi->hdmi_data.enc_in_format == YCBCR422_8BITS) {
409 if (hdmi->hdmi_data.enc_color_depth == 8)
410 color_format = 0x16;
411 else if (hdmi->hdmi_data.enc_color_depth == 10)
412 color_format = 0x14;
413 else if (hdmi->hdmi_data.enc_color_depth == 12)
414 color_format = 0x12;
415 else
416 return;
417 }
418
419 val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE |
420 ((color_format << HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET) &
421 HDMI_TX_INVID0_VIDEO_MAPPING_MASK);
422 hdmi_writeb(hdmi, val, HDMI_TX_INVID0);
423
424 /* Enable TX stuffing: When DE is inactive, fix the output data to 0 */
425 val = HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE |
426 HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE |
427 HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE;
428 hdmi_writeb(hdmi, val, HDMI_TX_INSTUFFING);
429 hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA0);
430 hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA1);
431 hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA0);
432 hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA1);
433 hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA0);
434 hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA1);
435 }
436
is_color_space_conversion(struct dw_hdmi * hdmi)437 static int is_color_space_conversion(struct dw_hdmi *hdmi)
438 {
439 return hdmi->hdmi_data.enc_in_format != hdmi->hdmi_data.enc_out_format;
440 }
441
is_color_space_decimation(struct dw_hdmi * hdmi)442 static int is_color_space_decimation(struct dw_hdmi *hdmi)
443 {
444 if (hdmi->hdmi_data.enc_out_format != YCBCR422_8BITS)
445 return 0;
446 if (hdmi->hdmi_data.enc_in_format == RGB ||
447 hdmi->hdmi_data.enc_in_format == YCBCR444)
448 return 1;
449 return 0;
450 }
451
is_color_space_interpolation(struct dw_hdmi * hdmi)452 static int is_color_space_interpolation(struct dw_hdmi *hdmi)
453 {
454 if (hdmi->hdmi_data.enc_in_format != YCBCR422_8BITS)
455 return 0;
456 if (hdmi->hdmi_data.enc_out_format == RGB ||
457 hdmi->hdmi_data.enc_out_format == YCBCR444)
458 return 1;
459 return 0;
460 }
461
dw_hdmi_update_csc_coeffs(struct dw_hdmi * hdmi)462 static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi)
463 {
464 const u16 (*csc_coeff)[3][4] = &csc_coeff_default;
465 unsigned i;
466 u32 csc_scale = 1;
467
468 if (is_color_space_conversion(hdmi)) {
469 if (hdmi->hdmi_data.enc_out_format == RGB) {
470 if (hdmi->hdmi_data.colorimetry ==
471 HDMI_COLORIMETRY_ITU_601)
472 csc_coeff = &csc_coeff_rgb_out_eitu601;
473 else
474 csc_coeff = &csc_coeff_rgb_out_eitu709;
475 } else if (hdmi->hdmi_data.enc_in_format == RGB) {
476 if (hdmi->hdmi_data.colorimetry ==
477 HDMI_COLORIMETRY_ITU_601)
478 csc_coeff = &csc_coeff_rgb_in_eitu601;
479 else
480 csc_coeff = &csc_coeff_rgb_in_eitu709;
481 csc_scale = 0;
482 }
483 }
484
485 /* The CSC registers are sequential, alternating MSB then LSB */
486 for (i = 0; i < ARRAY_SIZE(csc_coeff_default[0]); i++) {
487 u16 coeff_a = (*csc_coeff)[0][i];
488 u16 coeff_b = (*csc_coeff)[1][i];
489 u16 coeff_c = (*csc_coeff)[2][i];
490
491 hdmi_writeb(hdmi, coeff_a & 0xff, HDMI_CSC_COEF_A1_LSB + i * 2);
492 hdmi_writeb(hdmi, coeff_a >> 8, HDMI_CSC_COEF_A1_MSB + i * 2);
493 hdmi_writeb(hdmi, coeff_b & 0xff, HDMI_CSC_COEF_B1_LSB + i * 2);
494 hdmi_writeb(hdmi, coeff_b >> 8, HDMI_CSC_COEF_B1_MSB + i * 2);
495 hdmi_writeb(hdmi, coeff_c & 0xff, HDMI_CSC_COEF_C1_LSB + i * 2);
496 hdmi_writeb(hdmi, coeff_c >> 8, HDMI_CSC_COEF_C1_MSB + i * 2);
497 }
498
499 hdmi_modb(hdmi, csc_scale, HDMI_CSC_SCALE_CSCSCALE_MASK,
500 HDMI_CSC_SCALE);
501 }
502
hdmi_video_csc(struct dw_hdmi * hdmi)503 static void hdmi_video_csc(struct dw_hdmi *hdmi)
504 {
505 int color_depth = 0;
506 int interpolation = HDMI_CSC_CFG_INTMODE_DISABLE;
507 int decimation = 0;
508
509 /* YCC422 interpolation to 444 mode */
510 if (is_color_space_interpolation(hdmi))
511 interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1;
512 else if (is_color_space_decimation(hdmi))
513 decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3;
514
515 if (hdmi->hdmi_data.enc_color_depth == 8)
516 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP;
517 else if (hdmi->hdmi_data.enc_color_depth == 10)
518 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP;
519 else if (hdmi->hdmi_data.enc_color_depth == 12)
520 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP;
521 else if (hdmi->hdmi_data.enc_color_depth == 16)
522 color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP;
523 else
524 return;
525
526 /* Configure the CSC registers */
527 hdmi_writeb(hdmi, interpolation | decimation, HDMI_CSC_CFG);
528 hdmi_modb(hdmi, color_depth, HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK,
529 HDMI_CSC_SCALE);
530
531 dw_hdmi_update_csc_coeffs(hdmi);
532 }
533
534 /*
535 * HDMI video packetizer is used to packetize the data.
536 * for example, if input is YCC422 mode or repeater is used,
537 * data should be repacked this module can be bypassed.
538 */
hdmi_video_packetize(struct dw_hdmi * hdmi)539 static void hdmi_video_packetize(struct dw_hdmi *hdmi)
540 {
541 unsigned int color_depth = 0;
542 unsigned int remap_size = HDMI_VP_REMAP_YCC422_16bit;
543 unsigned int output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_PP;
544 struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
545 u8 val, vp_conf;
546
547 if (hdmi_data->enc_out_format == RGB ||
548 hdmi_data->enc_out_format == YCBCR444) {
549 if (!hdmi_data->enc_color_depth) {
550 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
551 } else if (hdmi_data->enc_color_depth == 8) {
552 color_depth = 4;
553 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
554 } else if (hdmi_data->enc_color_depth == 10) {
555 color_depth = 5;
556 } else if (hdmi_data->enc_color_depth == 12) {
557 color_depth = 6;
558 } else if (hdmi_data->enc_color_depth == 16) {
559 color_depth = 7;
560 } else {
561 return;
562 }
563 } else if (hdmi_data->enc_out_format == YCBCR422_8BITS) {
564 if (!hdmi_data->enc_color_depth ||
565 hdmi_data->enc_color_depth == 8)
566 remap_size = HDMI_VP_REMAP_YCC422_16bit;
567 else if (hdmi_data->enc_color_depth == 10)
568 remap_size = HDMI_VP_REMAP_YCC422_20bit;
569 else if (hdmi_data->enc_color_depth == 12)
570 remap_size = HDMI_VP_REMAP_YCC422_24bit;
571 else
572 return;
573 output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422;
574 } else {
575 return;
576 }
577
578 /* set the packetizer registers */
579 val = ((color_depth << HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET) &
580 HDMI_VP_PR_CD_COLOR_DEPTH_MASK) |
581 ((hdmi_data->pix_repet_factor <<
582 HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET) &
583 HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK);
584 hdmi_writeb(hdmi, val, HDMI_VP_PR_CD);
585
586 hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE,
587 HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF);
588
589 /* Data from pixel repeater block */
590 if (hdmi_data->pix_repet_factor > 1) {
591 vp_conf = HDMI_VP_CONF_PR_EN_ENABLE |
592 HDMI_VP_CONF_BYPASS_SELECT_PIX_REPEATER;
593 } else { /* data from packetizer block */
594 vp_conf = HDMI_VP_CONF_PR_EN_DISABLE |
595 HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER;
596 }
597
598 hdmi_modb(hdmi, vp_conf,
599 HDMI_VP_CONF_PR_EN_MASK |
600 HDMI_VP_CONF_BYPASS_SELECT_MASK, HDMI_VP_CONF);
601
602 hdmi_modb(hdmi, 1 << HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET,
603 HDMI_VP_STUFF_IDEFAULT_PHASE_MASK, HDMI_VP_STUFF);
604
605 hdmi_writeb(hdmi, remap_size, HDMI_VP_REMAP);
606
607 if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_PP) {
608 vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
609 HDMI_VP_CONF_PP_EN_ENABLE |
610 HDMI_VP_CONF_YCC422_EN_DISABLE;
611 } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422) {
612 vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
613 HDMI_VP_CONF_PP_EN_DISABLE |
614 HDMI_VP_CONF_YCC422_EN_ENABLE;
615 } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS) {
616 vp_conf = HDMI_VP_CONF_BYPASS_EN_ENABLE |
617 HDMI_VP_CONF_PP_EN_DISABLE |
618 HDMI_VP_CONF_YCC422_EN_DISABLE;
619 } else {
620 return;
621 }
622
623 hdmi_modb(hdmi, vp_conf,
624 HDMI_VP_CONF_BYPASS_EN_MASK | HDMI_VP_CONF_PP_EN_ENMASK |
625 HDMI_VP_CONF_YCC422_EN_MASK, HDMI_VP_CONF);
626
627 hdmi_modb(hdmi, HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE |
628 HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE,
629 HDMI_VP_STUFF_PP_STUFFING_MASK |
630 HDMI_VP_STUFF_YCC422_STUFFING_MASK, HDMI_VP_STUFF);
631
632 hdmi_modb(hdmi, output_select, HDMI_VP_CONF_OUTPUT_SELECTOR_MASK,
633 HDMI_VP_CONF);
634 }
635
hdmi_phy_test_clear(struct dw_hdmi * hdmi,unsigned char bit)636 static inline void hdmi_phy_test_clear(struct dw_hdmi *hdmi,
637 unsigned char bit)
638 {
639 hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLR_OFFSET,
640 HDMI_PHY_TST0_TSTCLR_MASK, HDMI_PHY_TST0);
641 }
642
hdmi_phy_test_enable(struct dw_hdmi * hdmi,unsigned char bit)643 static inline void hdmi_phy_test_enable(struct dw_hdmi *hdmi,
644 unsigned char bit)
645 {
646 hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTEN_OFFSET,
647 HDMI_PHY_TST0_TSTEN_MASK, HDMI_PHY_TST0);
648 }
649
hdmi_phy_test_clock(struct dw_hdmi * hdmi,unsigned char bit)650 static inline void hdmi_phy_test_clock(struct dw_hdmi *hdmi,
651 unsigned char bit)
652 {
653 hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLK_OFFSET,
654 HDMI_PHY_TST0_TSTCLK_MASK, HDMI_PHY_TST0);
655 }
656
hdmi_phy_test_din(struct dw_hdmi * hdmi,unsigned char bit)657 static inline void hdmi_phy_test_din(struct dw_hdmi *hdmi,
658 unsigned char bit)
659 {
660 hdmi_writeb(hdmi, bit, HDMI_PHY_TST1);
661 }
662
hdmi_phy_test_dout(struct dw_hdmi * hdmi,unsigned char bit)663 static inline void hdmi_phy_test_dout(struct dw_hdmi *hdmi,
664 unsigned char bit)
665 {
666 hdmi_writeb(hdmi, bit, HDMI_PHY_TST2);
667 }
668
hdmi_phy_wait_i2c_done(struct dw_hdmi * hdmi,int msec)669 static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec)
670 {
671 u32 val;
672
673 while ((val = hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) {
674 if (msec-- == 0)
675 return false;
676 udelay(1000);
677 }
678 hdmi_writeb(hdmi, val, HDMI_IH_I2CMPHY_STAT0);
679
680 return true;
681 }
682
__hdmi_phy_i2c_write(struct dw_hdmi * hdmi,unsigned short data,unsigned char addr)683 static void __hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
684 unsigned char addr)
685 {
686 hdmi_writeb(hdmi, 0xFF, HDMI_IH_I2CMPHY_STAT0);
687 hdmi_writeb(hdmi, addr, HDMI_PHY_I2CM_ADDRESS_ADDR);
688 hdmi_writeb(hdmi, (unsigned char)(data >> 8),
689 HDMI_PHY_I2CM_DATAO_1_ADDR);
690 hdmi_writeb(hdmi, (unsigned char)(data >> 0),
691 HDMI_PHY_I2CM_DATAO_0_ADDR);
692 hdmi_writeb(hdmi, HDMI_PHY_I2CM_OPERATION_ADDR_WRITE,
693 HDMI_PHY_I2CM_OPERATION_ADDR);
694 hdmi_phy_wait_i2c_done(hdmi, 1000);
695 }
696
hdmi_phy_i2c_write(struct dw_hdmi * hdmi,unsigned short data,unsigned char addr)697 static int hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
698 unsigned char addr)
699 {
700 __hdmi_phy_i2c_write(hdmi, data, addr);
701 return 0;
702 }
703
dw_hdmi_phy_enable_power(struct dw_hdmi * hdmi,u8 enable)704 static void dw_hdmi_phy_enable_power(struct dw_hdmi *hdmi, u8 enable)
705 {
706 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
707 HDMI_PHY_CONF0_PDZ_OFFSET,
708 HDMI_PHY_CONF0_PDZ_MASK);
709 }
710
dw_hdmi_phy_enable_tmds(struct dw_hdmi * hdmi,u8 enable)711 static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
712 {
713 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
714 HDMI_PHY_CONF0_ENTMDS_OFFSET,
715 HDMI_PHY_CONF0_ENTMDS_MASK);
716 }
717
dw_hdmi_phy_enable_spare(struct dw_hdmi * hdmi,u8 enable)718 static void dw_hdmi_phy_enable_spare(struct dw_hdmi *hdmi, u8 enable)
719 {
720 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
721 HDMI_PHY_CONF0_SPARECTRL_OFFSET,
722 HDMI_PHY_CONF0_SPARECTRL_MASK);
723 }
724
dw_hdmi_phy_gen2_pddq(struct dw_hdmi * hdmi,u8 enable)725 static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
726 {
727 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
728 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
729 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
730 }
731
dw_hdmi_phy_gen2_txpwron(struct dw_hdmi * hdmi,u8 enable)732 static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
733 {
734 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
735 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
736 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
737 }
738
dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi * hdmi,u8 enable)739 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
740 {
741 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
742 HDMI_PHY_CONF0_SELDATAENPOL_OFFSET,
743 HDMI_PHY_CONF0_SELDATAENPOL_MASK);
744 }
745
dw_hdmi_phy_sel_interface_control(struct dw_hdmi * hdmi,u8 enable)746 static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
747 {
748 hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
749 HDMI_PHY_CONF0_SELDIPIF_OFFSET,
750 HDMI_PHY_CONF0_SELDIPIF_MASK);
751 }
752
hdmi_phy_configure(struct dw_hdmi * hdmi,unsigned char prep,unsigned char res,int cscon)753 static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
754 unsigned char res, int cscon)
755 {
756 unsigned res_idx, i;
757 u8 val, msec;
758 const struct dw_hdmi_plat_data *plat_data = hdmi->plat_data;
759 const struct dw_hdmi_mpll_config *mpll_config = plat_data->mpll_cfg;
760 const struct dw_hdmi_curr_ctrl *curr_ctrl = plat_data->cur_ctr;
761 const struct dw_hdmi_phy_config *phy_config = plat_data->phy_config;
762
763 if (prep)
764 return -EINVAL;
765
766 switch (res) {
767 case 0: /* color resolution 0 is 8 bit colour depth */
768 case 8:
769 res_idx = DW_HDMI_RES_8;
770 break;
771 case 10:
772 res_idx = DW_HDMI_RES_10;
773 break;
774 case 12:
775 res_idx = DW_HDMI_RES_12;
776 break;
777 default:
778 return -EINVAL;
779 }
780
781 /* Enable csc path */
782 if (cscon)
783 val = HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH;
784 else
785 val = HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS;
786
787 hdmi_writeb(hdmi, val, HDMI_MC_FLOWCTRL);
788
789 /* gen2 tx power off */
790 dw_hdmi_phy_gen2_txpwron(hdmi, 0);
791
792 /* gen2 pddq */
793 dw_hdmi_phy_gen2_pddq(hdmi, 1);
794
795 /* PHY reset */
796 hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_DEASSERT, HDMI_MC_PHYRSTZ);
797 hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_ASSERT, HDMI_MC_PHYRSTZ);
798
799 hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
800
801 hdmi_phy_test_clear(hdmi, 1);
802 hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
803 HDMI_PHY_I2CM_SLAVE_ADDR);
804 hdmi_phy_test_clear(hdmi, 0);
805
806 /* PLL/MPLL Cfg - always match on final entry */
807 for (i = 0; mpll_config[i].mpixelclock != (~0UL); i++)
808 if (hdmi->hdmi_data.video_mode.mpixelclock <=
809 mpll_config[i].mpixelclock)
810 break;
811
812 hdmi_phy_i2c_write(hdmi, mpll_config[i].res[res_idx].cpce, 0x06);
813 hdmi_phy_i2c_write(hdmi, mpll_config[i].res[res_idx].gmp, 0x15);
814
815 for (i = 0; curr_ctrl[i].mpixelclock != (~0UL); i++)
816 if (hdmi->hdmi_data.video_mode.mpixelclock <=
817 curr_ctrl[i].mpixelclock)
818 break;
819
820 if (curr_ctrl[i].mpixelclock == (~0UL)) {
821 dev_err(hdmi->dev, "Pixel clock %d - unsupported by HDMI\n",
822 hdmi->hdmi_data.video_mode.mpixelclock);
823 return -EINVAL;
824 }
825
826 /* CURRCTRL */
827 hdmi_phy_i2c_write(hdmi, curr_ctrl[i].curr[res_idx], 0x10);
828
829 hdmi_phy_i2c_write(hdmi, 0x0000, 0x13); /* PLLPHBYCTRL */
830 hdmi_phy_i2c_write(hdmi, 0x0006, 0x17);
831
832 for (i = 0; phy_config[i].mpixelclock != (~0UL); i++)
833 if (hdmi->hdmi_data.video_mode.mpixelclock <=
834 phy_config[i].mpixelclock)
835 break;
836
837 /* RESISTANCE TERM 133Ohm Cfg */
838 hdmi_phy_i2c_write(hdmi, phy_config[i].term, 0x19); /* TXTERM */
839 /* PREEMP Cgf 0.00 */
840 hdmi_phy_i2c_write(hdmi, phy_config[i].sym_ctr, 0x09); /* CKSYMTXCTRL */
841 /* TX/CK LVL 10 */
842 hdmi_phy_i2c_write(hdmi, phy_config[i].vlev_ctr, 0x0E); /* VLEVCTRL */
843
844 /* REMOVE CLK TERM */
845 hdmi_phy_i2c_write(hdmi, 0x8000, 0x05); /* CKCALCTRL */
846
847 dw_hdmi_phy_enable_power(hdmi, 1);
848
849 /* toggle TMDS enable */
850 dw_hdmi_phy_enable_tmds(hdmi, 0);
851 dw_hdmi_phy_enable_tmds(hdmi, 1);
852
853 /* gen2 tx power on */
854 dw_hdmi_phy_gen2_txpwron(hdmi, 1);
855 dw_hdmi_phy_gen2_pddq(hdmi, 0);
856
857 if (hdmi->dev_type == RK3288_HDMI)
858 dw_hdmi_phy_enable_spare(hdmi, 1);
859
860 /*Wait for PHY PLL lock */
861 msec = 5;
862 do {
863 val = hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_TX_PHY_LOCK;
864 if (!val)
865 break;
866
867 if (msec == 0) {
868 dev_err(hdmi->dev, "PHY PLL not locked\n");
869 return -ETIMEDOUT;
870 }
871
872 udelay(1000);
873 msec--;
874 } while (1);
875
876 return 0;
877 }
878
dw_hdmi_phy_init(struct dw_hdmi * hdmi)879 static int dw_hdmi_phy_init(struct dw_hdmi *hdmi)
880 {
881 int i, ret;
882 bool cscon = false;
883
884 /*check csc whether needed activated in HDMI mode */
885 cscon = (is_color_space_conversion(hdmi) &&
886 !hdmi->hdmi_data.video_mode.mdvi);
887
888 /* HDMI Phy spec says to do the phy initialization sequence twice */
889 for (i = 0; i < 2; i++) {
890 dw_hdmi_phy_sel_data_en_pol(hdmi, 1);
891 dw_hdmi_phy_sel_interface_control(hdmi, 0);
892 dw_hdmi_phy_enable_tmds(hdmi, 0);
893 dw_hdmi_phy_enable_power(hdmi, 0);
894
895 /* Enable CSC */
896 ret = hdmi_phy_configure(hdmi, 0, 8, cscon);
897 if (ret)
898 return ret;
899 }
900
901 hdmi->phy_enabled = true;
902 return 0;
903 }
904
hdmi_tx_hdcp_config(struct dw_hdmi * hdmi)905 static void hdmi_tx_hdcp_config(struct dw_hdmi *hdmi)
906 {
907 u8 de;
908
909 if (hdmi->hdmi_data.video_mode.mdataenablepolarity)
910 de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_HIGH;
911 else
912 de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_LOW;
913
914 /* disable rx detect */
915 hdmi_modb(hdmi, HDMI_A_HDCPCFG0_RXDETECT_DISABLE,
916 HDMI_A_HDCPCFG0_RXDETECT_MASK, HDMI_A_HDCPCFG0);
917
918 hdmi_modb(hdmi, de, HDMI_A_VIDPOLCFG_DATAENPOL_MASK, HDMI_A_VIDPOLCFG);
919
920 hdmi_modb(hdmi, HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_DISABLE,
921 HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK, HDMI_A_HDCPCFG1);
922 }
923
hdmi_config_AVI(struct dw_hdmi * hdmi)924 static void hdmi_config_AVI(struct dw_hdmi *hdmi)
925 {
926 u8 val, pix_fmt, under_scan;
927 u8 act_ratio, coded_ratio, colorimetry, ext_colorimetry;
928 bool aspect_16_9;
929
930 aspect_16_9 = false; /* FIXME */
931
932 /* AVI Data Byte 1 */
933 if (hdmi->hdmi_data.enc_out_format == YCBCR444)
934 pix_fmt = HDMI_FC_AVICONF0_PIX_FMT_YCBCR444;
935 else if (hdmi->hdmi_data.enc_out_format == YCBCR422_8BITS)
936 pix_fmt = HDMI_FC_AVICONF0_PIX_FMT_YCBCR422;
937 else
938 pix_fmt = HDMI_FC_AVICONF0_PIX_FMT_RGB;
939
940 under_scan = HDMI_FC_AVICONF0_SCAN_INFO_NODATA;
941
942 /*
943 * Active format identification data is present in the AVI InfoFrame.
944 * Under scan info, no bar data
945 */
946 val = pix_fmt | under_scan |
947 HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT |
948 HDMI_FC_AVICONF0_BAR_DATA_NO_DATA;
949
950 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0);
951
952 /* AVI Data Byte 2 -Set the Aspect Ratio */
953 if (aspect_16_9) {
954 act_ratio = HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_16_9;
955 coded_ratio = HDMI_FC_AVICONF1_CODED_ASPECT_RATIO_16_9;
956 } else {
957 act_ratio = HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_4_3;
958 coded_ratio = HDMI_FC_AVICONF1_CODED_ASPECT_RATIO_4_3;
959 }
960
961 /* Set up colorimetry */
962 if (hdmi->hdmi_data.enc_out_format == XVYCC444) {
963 colorimetry = HDMI_FC_AVICONF1_COLORIMETRY_EXTENDED_INFO;
964 if (hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_601)
965 ext_colorimetry =
966 HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC601;
967 else /*hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_709*/
968 ext_colorimetry =
969 HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC709;
970 } else if (hdmi->hdmi_data.enc_out_format != RGB) {
971 if (hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_601)
972 colorimetry = HDMI_FC_AVICONF1_COLORIMETRY_SMPTE;
973 else /*hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_709*/
974 colorimetry = HDMI_FC_AVICONF1_COLORIMETRY_ITUR;
975 ext_colorimetry = HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC601;
976 } else { /* Carries no data */
977 colorimetry = HDMI_FC_AVICONF1_COLORIMETRY_NO_DATA;
978 ext_colorimetry = HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC601;
979 }
980
981 val = colorimetry | coded_ratio | act_ratio;
982 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF1);
983
984 /* AVI Data Byte 3 */
985 val = HDMI_FC_AVICONF2_IT_CONTENT_NO_DATA | ext_colorimetry |
986 HDMI_FC_AVICONF2_RGB_QUANT_DEFAULT |
987 HDMI_FC_AVICONF2_SCALING_NONE;
988 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF2);
989
990 /* AVI Data Byte 4 */
991 hdmi_writeb(hdmi, hdmi->vic, HDMI_FC_AVIVID);
992
993 /* AVI Data Byte 5- set up input and output pixel repetition */
994 val = (((hdmi->hdmi_data.video_mode.mpixelrepetitioninput + 1) <<
995 HDMI_FC_PRCONF_INCOMING_PR_FACTOR_OFFSET) &
996 HDMI_FC_PRCONF_INCOMING_PR_FACTOR_MASK) |
997 ((hdmi->hdmi_data.video_mode.mpixelrepetitionoutput <<
998 HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_OFFSET) &
999 HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK);
1000 hdmi_writeb(hdmi, val, HDMI_FC_PRCONF);
1001
1002 /* IT Content and quantization range = don't care */
1003 val = HDMI_FC_AVICONF3_IT_CONTENT_TYPE_GRAPHICS |
1004 HDMI_FC_AVICONF3_QUANT_RANGE_LIMITED;
1005 hdmi_writeb(hdmi, val, HDMI_FC_AVICONF3);
1006
1007 /* AVI Data Bytes 6-13 */
1008 hdmi_writeb(hdmi, 0, HDMI_FC_AVIETB0);
1009 hdmi_writeb(hdmi, 0, HDMI_FC_AVIETB1);
1010 hdmi_writeb(hdmi, 0, HDMI_FC_AVISBB0);
1011 hdmi_writeb(hdmi, 0, HDMI_FC_AVISBB1);
1012 hdmi_writeb(hdmi, 0, HDMI_FC_AVIELB0);
1013 hdmi_writeb(hdmi, 0, HDMI_FC_AVIELB1);
1014 hdmi_writeb(hdmi, 0, HDMI_FC_AVISRB0);
1015 hdmi_writeb(hdmi, 0, HDMI_FC_AVISRB1);
1016 }
1017
hdmi_av_composer(struct dw_hdmi * hdmi,const struct drm_display_mode * mode)1018 static void hdmi_av_composer(struct dw_hdmi *hdmi,
1019 const struct drm_display_mode *mode)
1020 {
1021 u8 inv_val;
1022 struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode;
1023 int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
1024
1025 vmode->mhsyncpolarity = !!(mode->flags & DRM_MODE_FLAG_PHSYNC);
1026 vmode->mvsyncpolarity = !!(mode->flags & DRM_MODE_FLAG_PVSYNC);
1027 vmode->minterlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1028 vmode->mpixelclock = mode->clock * 1000;
1029
1030 dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
1031
1032 /* Set up HDMI_FC_INVIDCONF */
1033 inv_val = (hdmi->hdmi_data.hdcp_enable ?
1034 HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE :
1035 HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE);
1036
1037 inv_val |= (vmode->mvsyncpolarity ?
1038 HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH :
1039 HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW);
1040
1041 inv_val |= (vmode->mhsyncpolarity ?
1042 HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH :
1043 HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW);
1044
1045 inv_val |= (vmode->mdataenablepolarity ?
1046 HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH :
1047 HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW);
1048
1049 if (hdmi->vic == 39)
1050 inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH;
1051 else
1052 inv_val |= (vmode->minterlaced ?
1053 HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH :
1054 HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW);
1055
1056 inv_val |= (vmode->minterlaced ?
1057 HDMI_FC_INVIDCONF_IN_I_P_INTERLACED :
1058 HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE);
1059
1060 inv_val |= (vmode->mdvi ?
1061 HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE :
1062 HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE);
1063
1064 hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF);
1065
1066 /* Set up horizontal active pixel width */
1067 hdmi_writeb(hdmi, mode->hdisplay >> 8, HDMI_FC_INHACTV1);
1068 hdmi_writeb(hdmi, mode->hdisplay, HDMI_FC_INHACTV0);
1069
1070 /* Set up vertical active lines */
1071 hdmi_writeb(hdmi, mode->vdisplay >> 8, HDMI_FC_INVACTV1);
1072 hdmi_writeb(hdmi, mode->vdisplay, HDMI_FC_INVACTV0);
1073
1074 /* Set up horizontal blanking pixel region width */
1075 hblank = mode->htotal - mode->hdisplay;
1076 hdmi_writeb(hdmi, hblank >> 8, HDMI_FC_INHBLANK1);
1077 hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0);
1078
1079 /* Set up vertical blanking pixel region width */
1080 vblank = mode->vtotal - mode->vdisplay;
1081 hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK);
1082
1083 /* Set up HSYNC active edge delay width (in pixel clks) */
1084 h_de_hs = mode->hsync_start - mode->hdisplay;
1085 hdmi_writeb(hdmi, h_de_hs >> 8, HDMI_FC_HSYNCINDELAY1);
1086 hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0);
1087
1088 /* Set up VSYNC active edge delay (in lines) */
1089 v_de_vs = mode->vsync_start - mode->vdisplay;
1090 hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY);
1091
1092 /* Set up HSYNC active pulse width (in pixel clks) */
1093 hsync_len = mode->hsync_end - mode->hsync_start;
1094 hdmi_writeb(hdmi, hsync_len >> 8, HDMI_FC_HSYNCINWIDTH1);
1095 hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0);
1096
1097 /* Set up VSYNC active edge delay (in lines) */
1098 vsync_len = mode->vsync_end - mode->vsync_start;
1099 hdmi_writeb(hdmi, vsync_len, HDMI_FC_VSYNCINWIDTH);
1100 }
1101
dw_hdmi_phy_disable(struct dw_hdmi * hdmi)1102 static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi)
1103 {
1104 if (!hdmi->phy_enabled)
1105 return;
1106
1107 dw_hdmi_phy_enable_tmds(hdmi, 0);
1108 dw_hdmi_phy_enable_power(hdmi, 0);
1109
1110 hdmi->phy_enabled = false;
1111 }
1112
1113 /* HDMI Initialization Step B.4 */
dw_hdmi_enable_video_path(struct dw_hdmi * hdmi)1114 static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi)
1115 {
1116 u8 clkdis;
1117
1118 /* control period minimum duration */
1119 hdmi_writeb(hdmi, 12, HDMI_FC_CTRLDUR);
1120 hdmi_writeb(hdmi, 32, HDMI_FC_EXCTRLDUR);
1121 hdmi_writeb(hdmi, 1, HDMI_FC_EXCTRLSPAC);
1122
1123 /* Set to fill TMDS data channels */
1124 hdmi_writeb(hdmi, 0x0B, HDMI_FC_CH0PREAM);
1125 hdmi_writeb(hdmi, 0x16, HDMI_FC_CH1PREAM);
1126 hdmi_writeb(hdmi, 0x21, HDMI_FC_CH2PREAM);
1127
1128 /* Enable pixel clock and tmds data path */
1129 clkdis = 0x7F;
1130 clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE;
1131 hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
1132
1133 clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
1134 hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
1135
1136 /* Enable csc path */
1137 if (is_color_space_conversion(hdmi)) {
1138 clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE;
1139 hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
1140 }
1141 }
1142
hdmi_enable_audio_clk(struct dw_hdmi * hdmi)1143 static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi)
1144 {
1145 hdmi_modb(hdmi, 0, HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS);
1146 }
1147
1148 /* Workaround to clear the overflow condition */
dw_hdmi_clear_overflow(struct dw_hdmi * hdmi)1149 static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
1150 {
1151 int count;
1152 u8 val;
1153
1154 /* TMDS software reset */
1155 hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, HDMI_MC_SWRSTZ);
1156
1157 val = hdmi_readb(hdmi, HDMI_FC_INVIDCONF);
1158 if (hdmi->dev_type == IMX6DL_HDMI) {
1159 hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
1160 return;
1161 }
1162
1163 for (count = 0; count < 4; count++)
1164 hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
1165 }
1166
hdmi_enable_overflow_interrupts(struct dw_hdmi * hdmi)1167 static void hdmi_enable_overflow_interrupts(struct dw_hdmi *hdmi)
1168 {
1169 hdmi_writeb(hdmi, 0, HDMI_FC_MASK2);
1170 hdmi_writeb(hdmi, 0, HDMI_IH_MUTE_FC_STAT2);
1171 }
1172
hdmi_disable_overflow_interrupts(struct dw_hdmi * hdmi)1173 static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
1174 {
1175 hdmi_writeb(hdmi, HDMI_IH_MUTE_FC_STAT2_OVERFLOW_MASK,
1176 HDMI_IH_MUTE_FC_STAT2);
1177 }
1178
dw_hdmi_setup(struct dw_hdmi * hdmi,struct drm_display_mode * mode)1179 static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
1180 {
1181 int ret;
1182
1183 hdmi_disable_overflow_interrupts(hdmi);
1184
1185 hdmi->vic = drm_match_cea_mode(mode);
1186
1187 if (!hdmi->vic) {
1188 dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n");
1189 hdmi->hdmi_data.video_mode.mdvi = true;
1190 } else {
1191 dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
1192 hdmi->hdmi_data.video_mode.mdvi = false;
1193 }
1194
1195 if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
1196 (hdmi->vic == 21) || (hdmi->vic == 22) ||
1197 (hdmi->vic == 2) || (hdmi->vic == 3) ||
1198 (hdmi->vic == 17) || (hdmi->vic == 18))
1199 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
1200 else
1201 hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
1202
1203 if ((hdmi->vic == 10) || (hdmi->vic == 11) ||
1204 (hdmi->vic == 12) || (hdmi->vic == 13) ||
1205 (hdmi->vic == 14) || (hdmi->vic == 15) ||
1206 (hdmi->vic == 25) || (hdmi->vic == 26) ||
1207 (hdmi->vic == 27) || (hdmi->vic == 28) ||
1208 (hdmi->vic == 29) || (hdmi->vic == 30) ||
1209 (hdmi->vic == 35) || (hdmi->vic == 36) ||
1210 (hdmi->vic == 37) || (hdmi->vic == 38))
1211 hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 1;
1212 else
1213 hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
1214
1215 hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
1216
1217 /* TODO: Get input format from IPU (via FB driver interface) */
1218 hdmi->hdmi_data.enc_in_format = RGB;
1219
1220 hdmi->hdmi_data.enc_out_format = RGB;
1221
1222 hdmi->hdmi_data.enc_color_depth = 8;
1223 hdmi->hdmi_data.pix_repet_factor = 0;
1224 hdmi->hdmi_data.hdcp_enable = 0;
1225 hdmi->hdmi_data.video_mode.mdataenablepolarity = true;
1226
1227 /* HDMI Initialization Step B.1 */
1228 hdmi_av_composer(hdmi, mode);
1229
1230 /* HDMI Initializateion Step B.2 */
1231 ret = dw_hdmi_phy_init(hdmi);
1232 if (ret)
1233 return ret;
1234
1235 /* HDMI Initialization Step B.3 */
1236 dw_hdmi_enable_video_path(hdmi);
1237
1238 /* not for DVI mode */
1239 if (hdmi->hdmi_data.video_mode.mdvi) {
1240 dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
1241 } else {
1242 dev_dbg(hdmi->dev, "%s CEA mode\n", __func__);
1243
1244 /* HDMI Initialization Step E - Configure audio */
1245 hdmi_clk_regenerator_update_pixel_clock(hdmi);
1246 hdmi_enable_audio_clk(hdmi);
1247
1248 /* HDMI Initialization Step F - Configure AVI InfoFrame */
1249 hdmi_config_AVI(hdmi);
1250 }
1251
1252 hdmi_video_packetize(hdmi);
1253 hdmi_video_csc(hdmi);
1254 hdmi_video_sample(hdmi);
1255 hdmi_tx_hdcp_config(hdmi);
1256
1257 dw_hdmi_clear_overflow(hdmi);
1258 if (hdmi->cable_plugin && !hdmi->hdmi_data.video_mode.mdvi)
1259 hdmi_enable_overflow_interrupts(hdmi);
1260
1261 return 0;
1262 }
1263
1264 /* Wait until we are registered to enable interrupts */
dw_hdmi_fb_registered(struct dw_hdmi * hdmi)1265 static int dw_hdmi_fb_registered(struct dw_hdmi *hdmi)
1266 {
1267 hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL,
1268 HDMI_PHY_I2CM_INT_ADDR);
1269
1270 hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL |
1271 HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL,
1272 HDMI_PHY_I2CM_CTLINT_ADDR);
1273
1274 /* enable cable hot plug irq */
1275 hdmi_writeb(hdmi, (u8)~HDMI_PHY_HPD, HDMI_PHY_MASK0);
1276
1277 /* Clear Hotplug interrupts */
1278 hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD, HDMI_IH_PHY_STAT0);
1279
1280 return 0;
1281 }
1282
initialize_hdmi_ih_mutes(struct dw_hdmi * hdmi)1283 static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
1284 {
1285 u8 ih_mute;
1286
1287 /*
1288 * Boot up defaults are:
1289 * HDMI_IH_MUTE = 0x03 (disabled)
1290 * HDMI_IH_MUTE_* = 0x00 (enabled)
1291 *
1292 * Disable top level interrupt bits in HDMI block
1293 */
1294 ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) |
1295 HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
1296 HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
1297
1298 hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
1299
1300 /* by default mask all interrupts */
1301 hdmi_writeb(hdmi, 0xff, HDMI_VP_MASK);
1302 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK0);
1303 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK1);
1304 hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK2);
1305 hdmi_writeb(hdmi, 0xff, HDMI_PHY_MASK0);
1306 hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_INT_ADDR);
1307 hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_CTLINT_ADDR);
1308 hdmi_writeb(hdmi, 0xff, HDMI_AUD_INT);
1309 hdmi_writeb(hdmi, 0xff, HDMI_AUD_SPDIFINT);
1310 hdmi_writeb(hdmi, 0xff, HDMI_AUD_HBR_MASK);
1311 hdmi_writeb(hdmi, 0xff, HDMI_GP_MASK);
1312 hdmi_writeb(hdmi, 0xff, HDMI_A_APIINTMSK);
1313 hdmi_writeb(hdmi, 0xff, HDMI_CEC_MASK);
1314 hdmi_writeb(hdmi, 0xff, HDMI_I2CM_INT);
1315 hdmi_writeb(hdmi, 0xff, HDMI_I2CM_CTLINT);
1316
1317 /* Disable interrupts in the IH_MUTE_* registers */
1318 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT0);
1319 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT1);
1320 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT2);
1321 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AS_STAT0);
1322 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_PHY_STAT0);
1323 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CM_STAT0);
1324 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_CEC_STAT0);
1325 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_VP_STAT0);
1326 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CMPHY_STAT0);
1327 hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
1328
1329 /* Enable top level interrupt bits in HDMI block */
1330 ih_mute &= ~(HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
1331 HDMI_IH_MUTE_MUTE_ALL_INTERRUPT);
1332 hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
1333 }
1334
dw_hdmi_poweron(struct dw_hdmi * hdmi)1335 static void dw_hdmi_poweron(struct dw_hdmi *hdmi)
1336 {
1337 dw_hdmi_setup(hdmi, &hdmi->previous_mode);
1338 }
1339
dw_hdmi_poweroff(struct dw_hdmi * hdmi)1340 static void dw_hdmi_poweroff(struct dw_hdmi *hdmi)
1341 {
1342 dw_hdmi_phy_disable(hdmi);
1343 }
1344
dw_hdmi_bridge_mode_set(struct drm_bridge * bridge,struct drm_display_mode * orig_mode,struct drm_display_mode * mode)1345 static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
1346 struct drm_display_mode *orig_mode,
1347 struct drm_display_mode *mode)
1348 {
1349 struct dw_hdmi *hdmi = bridge->driver_private;
1350
1351 dw_hdmi_setup(hdmi, mode);
1352
1353 /* Store the display mode for plugin/DKMS poweron events */
1354 memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode));
1355 }
1356
dw_hdmi_bridge_mode_fixup(struct drm_bridge * bridge,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)1357 static bool dw_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
1358 const struct drm_display_mode *mode,
1359 struct drm_display_mode *adjusted_mode)
1360 {
1361 return true;
1362 }
1363
dw_hdmi_bridge_disable(struct drm_bridge * bridge)1364 static void dw_hdmi_bridge_disable(struct drm_bridge *bridge)
1365 {
1366 struct dw_hdmi *hdmi = bridge->driver_private;
1367
1368 dw_hdmi_poweroff(hdmi);
1369 }
1370
dw_hdmi_bridge_enable(struct drm_bridge * bridge)1371 static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
1372 {
1373 struct dw_hdmi *hdmi = bridge->driver_private;
1374
1375 dw_hdmi_poweron(hdmi);
1376 }
1377
dw_hdmi_bridge_nop(struct drm_bridge * bridge)1378 static void dw_hdmi_bridge_nop(struct drm_bridge *bridge)
1379 {
1380 /* do nothing */
1381 }
1382
1383 static enum drm_connector_status
dw_hdmi_connector_detect(struct drm_connector * connector,bool force)1384 dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
1385 {
1386 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1387 connector);
1388
1389 return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
1390 connector_status_connected : connector_status_disconnected;
1391 }
1392
dw_hdmi_connector_get_modes(struct drm_connector * connector)1393 static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
1394 {
1395 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1396 connector);
1397 struct edid *edid;
1398 int ret;
1399
1400 if (!hdmi->ddc)
1401 return 0;
1402
1403 edid = drm_get_edid(connector, hdmi->ddc);
1404 if (edid) {
1405 dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
1406 edid->width_cm, edid->height_cm);
1407
1408 drm_mode_connector_update_edid_property(connector, edid);
1409 ret = drm_add_edid_modes(connector, edid);
1410 kfree(edid);
1411 } else {
1412 dev_dbg(hdmi->dev, "failed to get edid\n");
1413 }
1414
1415 return 0;
1416 }
1417
1418 static enum drm_mode_status
dw_hdmi_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)1419 dw_hdmi_connector_mode_valid(struct drm_connector *connector,
1420 struct drm_display_mode *mode)
1421 {
1422 struct dw_hdmi *hdmi = container_of(connector,
1423 struct dw_hdmi, connector);
1424 enum drm_mode_status mode_status = MODE_OK;
1425
1426 if (hdmi->plat_data->mode_valid)
1427 mode_status = hdmi->plat_data->mode_valid(connector, mode);
1428
1429 return mode_status;
1430 }
1431
dw_hdmi_connector_best_encoder(struct drm_connector * connector)1432 static struct drm_encoder *dw_hdmi_connector_best_encoder(struct drm_connector
1433 *connector)
1434 {
1435 struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
1436 connector);
1437
1438 return hdmi->encoder;
1439 }
1440
dw_hdmi_connector_destroy(struct drm_connector * connector)1441 static void dw_hdmi_connector_destroy(struct drm_connector *connector)
1442 {
1443 drm_connector_unregister(connector);
1444 drm_connector_cleanup(connector);
1445 }
1446
1447 static struct drm_connector_funcs dw_hdmi_connector_funcs = {
1448 .dpms = drm_helper_connector_dpms,
1449 .fill_modes = drm_helper_probe_single_connector_modes,
1450 .detect = dw_hdmi_connector_detect,
1451 .destroy = dw_hdmi_connector_destroy,
1452 };
1453
1454 static struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
1455 .get_modes = dw_hdmi_connector_get_modes,
1456 .mode_valid = dw_hdmi_connector_mode_valid,
1457 .best_encoder = dw_hdmi_connector_best_encoder,
1458 };
1459
1460 struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
1461 .enable = dw_hdmi_bridge_enable,
1462 .disable = dw_hdmi_bridge_disable,
1463 .pre_enable = dw_hdmi_bridge_nop,
1464 .post_disable = dw_hdmi_bridge_nop,
1465 .mode_set = dw_hdmi_bridge_mode_set,
1466 .mode_fixup = dw_hdmi_bridge_mode_fixup,
1467 };
1468
dw_hdmi_hardirq(int irq,void * dev_id)1469 static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id)
1470 {
1471 struct dw_hdmi *hdmi = dev_id;
1472 u8 intr_stat;
1473
1474 intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
1475 if (intr_stat)
1476 hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
1477
1478 return intr_stat ? IRQ_WAKE_THREAD : IRQ_NONE;
1479 }
1480
dw_hdmi_irq(int irq,void * dev_id)1481 static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
1482 {
1483 struct dw_hdmi *hdmi = dev_id;
1484 u8 intr_stat;
1485 u8 phy_int_pol;
1486
1487 intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
1488
1489 phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0);
1490
1491 if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
1492 if (phy_int_pol & HDMI_PHY_HPD) {
1493 dev_dbg(hdmi->dev, "EVENT=plugin\n");
1494
1495 hdmi_modb(hdmi, 0, HDMI_PHY_HPD, HDMI_PHY_POL0);
1496
1497 dw_hdmi_poweron(hdmi);
1498 } else {
1499 dev_dbg(hdmi->dev, "EVENT=plugout\n");
1500
1501 hdmi_modb(hdmi, HDMI_PHY_HPD, HDMI_PHY_HPD,
1502 HDMI_PHY_POL0);
1503
1504 dw_hdmi_poweroff(hdmi);
1505 }
1506 drm_helper_hpd_irq_event(hdmi->connector.dev);
1507 }
1508
1509 hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);
1510 hdmi_writeb(hdmi, ~HDMI_IH_PHY_STAT0_HPD, HDMI_IH_MUTE_PHY_STAT0);
1511
1512 return IRQ_HANDLED;
1513 }
1514
dw_hdmi_register(struct drm_device * drm,struct dw_hdmi * hdmi)1515 static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi)
1516 {
1517 struct drm_encoder *encoder = hdmi->encoder;
1518 struct drm_bridge *bridge;
1519 int ret;
1520
1521 bridge = devm_kzalloc(drm->dev, sizeof(*bridge), GFP_KERNEL);
1522 if (!bridge) {
1523 DRM_ERROR("Failed to allocate drm bridge\n");
1524 return -ENOMEM;
1525 }
1526
1527 hdmi->bridge = bridge;
1528 bridge->driver_private = hdmi;
1529 bridge->funcs = &dw_hdmi_bridge_funcs;
1530 ret = drm_bridge_attach(drm, bridge);
1531 if (ret) {
1532 DRM_ERROR("Failed to initialize bridge with drm\n");
1533 return -EINVAL;
1534 }
1535
1536 encoder->bridge = bridge;
1537 hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
1538
1539 drm_connector_helper_add(&hdmi->connector,
1540 &dw_hdmi_connector_helper_funcs);
1541 drm_connector_init(drm, &hdmi->connector, &dw_hdmi_connector_funcs,
1542 DRM_MODE_CONNECTOR_HDMIA);
1543
1544 hdmi->connector.encoder = encoder;
1545
1546 drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
1547
1548 return 0;
1549 }
1550
dw_hdmi_bind(struct device * dev,struct device * master,void * data,struct drm_encoder * encoder,struct resource * iores,int irq,const struct dw_hdmi_plat_data * plat_data)1551 int dw_hdmi_bind(struct device *dev, struct device *master,
1552 void *data, struct drm_encoder *encoder,
1553 struct resource *iores, int irq,
1554 const struct dw_hdmi_plat_data *plat_data)
1555 {
1556 struct drm_device *drm = data;
1557 struct device_node *np = dev->of_node;
1558 struct device_node *ddc_node;
1559 struct dw_hdmi *hdmi;
1560 int ret;
1561 u32 val = 1;
1562
1563 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1564 if (!hdmi)
1565 return -ENOMEM;
1566
1567 hdmi->plat_data = plat_data;
1568 hdmi->dev = dev;
1569 hdmi->dev_type = plat_data->dev_type;
1570 hdmi->sample_rate = 48000;
1571 hdmi->ratio = 100;
1572 hdmi->encoder = encoder;
1573
1574 mutex_init(&hdmi->audio_mutex);
1575
1576 of_property_read_u32(np, "reg-io-width", &val);
1577
1578 switch (val) {
1579 case 4:
1580 hdmi->write = dw_hdmi_writel;
1581 hdmi->read = dw_hdmi_readl;
1582 break;
1583 case 1:
1584 hdmi->write = dw_hdmi_writeb;
1585 hdmi->read = dw_hdmi_readb;
1586 break;
1587 default:
1588 dev_err(dev, "reg-io-width must be 1 or 4\n");
1589 return -EINVAL;
1590 }
1591
1592 ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
1593 if (ddc_node) {
1594 hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
1595 of_node_put(ddc_node);
1596 if (!hdmi->ddc) {
1597 dev_dbg(hdmi->dev, "failed to read ddc node\n");
1598 return -EPROBE_DEFER;
1599 }
1600
1601 } else {
1602 dev_dbg(hdmi->dev, "no ddc property found\n");
1603 }
1604
1605 hdmi->regs = devm_ioremap_resource(dev, iores);
1606 if (IS_ERR(hdmi->regs))
1607 return PTR_ERR(hdmi->regs);
1608
1609 hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
1610 if (IS_ERR(hdmi->isfr_clk)) {
1611 ret = PTR_ERR(hdmi->isfr_clk);
1612 dev_err(hdmi->dev, "Unable to get HDMI isfr clk: %d\n", ret);
1613 return ret;
1614 }
1615
1616 ret = clk_prepare_enable(hdmi->isfr_clk);
1617 if (ret) {
1618 dev_err(hdmi->dev, "Cannot enable HDMI isfr clock: %d\n", ret);
1619 return ret;
1620 }
1621
1622 hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb");
1623 if (IS_ERR(hdmi->iahb_clk)) {
1624 ret = PTR_ERR(hdmi->iahb_clk);
1625 dev_err(hdmi->dev, "Unable to get HDMI iahb clk: %d\n", ret);
1626 goto err_isfr;
1627 }
1628
1629 ret = clk_prepare_enable(hdmi->iahb_clk);
1630 if (ret) {
1631 dev_err(hdmi->dev, "Cannot enable HDMI iahb clock: %d\n", ret);
1632 goto err_isfr;
1633 }
1634
1635 /* Product and revision IDs */
1636 dev_info(dev,
1637 "Detected HDMI controller 0x%x:0x%x:0x%x:0x%x\n",
1638 hdmi_readb(hdmi, HDMI_DESIGN_ID),
1639 hdmi_readb(hdmi, HDMI_REVISION_ID),
1640 hdmi_readb(hdmi, HDMI_PRODUCT_ID0),
1641 hdmi_readb(hdmi, HDMI_PRODUCT_ID1));
1642
1643 initialize_hdmi_ih_mutes(hdmi);
1644
1645 ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
1646 dw_hdmi_irq, IRQF_SHARED,
1647 dev_name(dev), hdmi);
1648 if (ret)
1649 goto err_iahb;
1650
1651 /*
1652 * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
1653 * N and cts values before enabling phy
1654 */
1655 hdmi_init_clk_regenerator(hdmi);
1656
1657 /*
1658 * Configure registers related to HDMI interrupt
1659 * generation before registering IRQ.
1660 */
1661 hdmi_writeb(hdmi, HDMI_PHY_HPD, HDMI_PHY_POL0);
1662
1663 /* Clear Hotplug interrupts */
1664 hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD, HDMI_IH_PHY_STAT0);
1665
1666 ret = dw_hdmi_fb_registered(hdmi);
1667 if (ret)
1668 goto err_iahb;
1669
1670 ret = dw_hdmi_register(drm, hdmi);
1671 if (ret)
1672 goto err_iahb;
1673
1674 /* Unmute interrupts */
1675 hdmi_writeb(hdmi, ~HDMI_IH_PHY_STAT0_HPD, HDMI_IH_MUTE_PHY_STAT0);
1676
1677 dev_set_drvdata(dev, hdmi);
1678
1679 return 0;
1680
1681 err_iahb:
1682 clk_disable_unprepare(hdmi->iahb_clk);
1683 err_isfr:
1684 clk_disable_unprepare(hdmi->isfr_clk);
1685
1686 return ret;
1687 }
1688 EXPORT_SYMBOL_GPL(dw_hdmi_bind);
1689
dw_hdmi_unbind(struct device * dev,struct device * master,void * data)1690 void dw_hdmi_unbind(struct device *dev, struct device *master, void *data)
1691 {
1692 struct dw_hdmi *hdmi = dev_get_drvdata(dev);
1693
1694 /* Disable all interrupts */
1695 hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
1696
1697 hdmi->connector.funcs->destroy(&hdmi->connector);
1698 hdmi->encoder->funcs->destroy(hdmi->encoder);
1699
1700 clk_disable_unprepare(hdmi->iahb_clk);
1701 clk_disable_unprepare(hdmi->isfr_clk);
1702 i2c_put_adapter(hdmi->ddc);
1703 }
1704 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
1705
1706 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
1707 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
1708 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
1709 MODULE_DESCRIPTION("DW HDMI transmitter driver");
1710 MODULE_LICENSE("GPL");
1711 MODULE_ALIAS("platform:dw-hdmi");
1712