1 /*
2 * Samsung HDMI interface driver
3 *
4 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
5 *
6 * Tomasz Stanislawski, <t.stanislaws@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published
10 * by the Free Software Foundiation. either version 2 of the License,
11 * or (at your option) any later version
12 */
13
14 #define pr_fmt(fmt) "s5p-tv (hdmi_drv): " fmt
15
16 #ifdef CONFIG_VIDEO_SAMSUNG_S5P_HDMI_DEBUG
17 #define DEBUG
18 #endif
19
20 #include <linux/kernel.h>
21 #include <linux/slab.h>
22 #include <linux/io.h>
23 #include <linux/i2c.h>
24 #include <linux/platform_device.h>
25 #include <media/v4l2-subdev.h>
26 #include <linux/module.h>
27 #include <linux/interrupt.h>
28 #include <linux/irq.h>
29 #include <linux/delay.h>
30 #include <linux/bug.h>
31 #include <linux/pm_runtime.h>
32 #include <linux/clk.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/v4l2-dv-timings.h>
35
36 #include <media/s5p_hdmi.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-dev.h>
39 #include <media/v4l2-device.h>
40 #include <media/v4l2-dv-timings.h>
41
42 #include "regs-hdmi.h"
43
44 MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
45 MODULE_DESCRIPTION("Samsung HDMI");
46 MODULE_LICENSE("GPL");
47
48 struct hdmi_pulse {
49 u32 beg;
50 u32 end;
51 };
52
53 struct hdmi_timings {
54 struct hdmi_pulse hact;
55 u32 hsyn_pol; /* 0 - high, 1 - low */
56 struct hdmi_pulse hsyn;
57 u32 interlaced;
58 struct hdmi_pulse vact[2];
59 u32 vsyn_pol; /* 0 - high, 1 - low */
60 u32 vsyn_off;
61 struct hdmi_pulse vsyn[2];
62 };
63
64 struct hdmi_resources {
65 struct clk *hdmi;
66 struct clk *sclk_hdmi;
67 struct clk *sclk_pixel;
68 struct clk *sclk_hdmiphy;
69 struct clk *hdmiphy;
70 struct regulator_bulk_data *regul_bulk;
71 int regul_count;
72 };
73
74 struct hdmi_device {
75 /** base address of HDMI registers */
76 void __iomem *regs;
77 /** HDMI interrupt */
78 unsigned int irq;
79 /** pointer to device parent */
80 struct device *dev;
81 /** subdev generated by HDMI device */
82 struct v4l2_subdev sd;
83 /** V4L2 device structure */
84 struct v4l2_device v4l2_dev;
85 /** subdev of HDMIPHY interface */
86 struct v4l2_subdev *phy_sd;
87 /** subdev of MHL interface */
88 struct v4l2_subdev *mhl_sd;
89 /** configuration of current graphic mode */
90 const struct hdmi_timings *cur_conf;
91 /** flag indicating that timings are dirty */
92 int cur_conf_dirty;
93 /** current timings */
94 struct v4l2_dv_timings cur_timings;
95 /** other resources */
96 struct hdmi_resources res;
97 };
98
99 static struct platform_device_id hdmi_driver_types[] = {
100 {
101 .name = "s5pv210-hdmi",
102 }, {
103 .name = "exynos4-hdmi",
104 }, {
105 /* end node */
106 }
107 };
108
109 static const struct v4l2_subdev_ops hdmi_sd_ops;
110
sd_to_hdmi_dev(struct v4l2_subdev * sd)111 static struct hdmi_device *sd_to_hdmi_dev(struct v4l2_subdev *sd)
112 {
113 return container_of(sd, struct hdmi_device, sd);
114 }
115
116 static inline
hdmi_write(struct hdmi_device * hdev,u32 reg_id,u32 value)117 void hdmi_write(struct hdmi_device *hdev, u32 reg_id, u32 value)
118 {
119 writel(value, hdev->regs + reg_id);
120 }
121
122 static inline
hdmi_write_mask(struct hdmi_device * hdev,u32 reg_id,u32 value,u32 mask)123 void hdmi_write_mask(struct hdmi_device *hdev, u32 reg_id, u32 value, u32 mask)
124 {
125 u32 old = readl(hdev->regs + reg_id);
126 value = (value & mask) | (old & ~mask);
127 writel(value, hdev->regs + reg_id);
128 }
129
130 static inline
hdmi_writeb(struct hdmi_device * hdev,u32 reg_id,u8 value)131 void hdmi_writeb(struct hdmi_device *hdev, u32 reg_id, u8 value)
132 {
133 writeb(value, hdev->regs + reg_id);
134 }
135
136 static inline
hdmi_writebn(struct hdmi_device * hdev,u32 reg_id,int n,u32 value)137 void hdmi_writebn(struct hdmi_device *hdev, u32 reg_id, int n, u32 value)
138 {
139 switch (n) {
140 default:
141 writeb(value >> 24, hdev->regs + reg_id + 12);
142 case 3:
143 writeb(value >> 16, hdev->regs + reg_id + 8);
144 case 2:
145 writeb(value >> 8, hdev->regs + reg_id + 4);
146 case 1:
147 writeb(value >> 0, hdev->regs + reg_id + 0);
148 }
149 }
150
hdmi_read(struct hdmi_device * hdev,u32 reg_id)151 static inline u32 hdmi_read(struct hdmi_device *hdev, u32 reg_id)
152 {
153 return readl(hdev->regs + reg_id);
154 }
155
hdmi_irq_handler(int irq,void * dev_data)156 static irqreturn_t hdmi_irq_handler(int irq, void *dev_data)
157 {
158 struct hdmi_device *hdev = dev_data;
159 u32 intc_flag;
160
161 (void)irq;
162 intc_flag = hdmi_read(hdev, HDMI_INTC_FLAG);
163 /* clearing flags for HPD plug/unplug */
164 if (intc_flag & HDMI_INTC_FLAG_HPD_UNPLUG) {
165 pr_info("unplugged\n");
166 hdmi_write_mask(hdev, HDMI_INTC_FLAG, ~0,
167 HDMI_INTC_FLAG_HPD_UNPLUG);
168 }
169 if (intc_flag & HDMI_INTC_FLAG_HPD_PLUG) {
170 pr_info("plugged\n");
171 hdmi_write_mask(hdev, HDMI_INTC_FLAG, ~0,
172 HDMI_INTC_FLAG_HPD_PLUG);
173 }
174
175 return IRQ_HANDLED;
176 }
177
hdmi_reg_init(struct hdmi_device * hdev)178 static void hdmi_reg_init(struct hdmi_device *hdev)
179 {
180 /* enable HPD interrupts */
181 hdmi_write_mask(hdev, HDMI_INTC_CON, ~0, HDMI_INTC_EN_GLOBAL |
182 HDMI_INTC_EN_HPD_PLUG | HDMI_INTC_EN_HPD_UNPLUG);
183 /* choose DVI mode */
184 hdmi_write_mask(hdev, HDMI_MODE_SEL,
185 HDMI_MODE_DVI_EN, HDMI_MODE_MASK);
186 hdmi_write_mask(hdev, HDMI_CON_2, ~0,
187 HDMI_DVI_PERAMBLE_EN | HDMI_DVI_BAND_EN);
188 /* disable bluescreen */
189 hdmi_write_mask(hdev, HDMI_CON_0, 0, HDMI_BLUE_SCR_EN);
190 /* choose bluescreen (fecal) color */
191 hdmi_writeb(hdev, HDMI_BLUE_SCREEN_0, 0x12);
192 hdmi_writeb(hdev, HDMI_BLUE_SCREEN_1, 0x34);
193 hdmi_writeb(hdev, HDMI_BLUE_SCREEN_2, 0x56);
194 }
195
hdmi_timing_apply(struct hdmi_device * hdev,const struct hdmi_timings * t)196 static void hdmi_timing_apply(struct hdmi_device *hdev,
197 const struct hdmi_timings *t)
198 {
199 /* setting core registers */
200 hdmi_writebn(hdev, HDMI_H_BLANK_0, 2, t->hact.beg);
201 hdmi_writebn(hdev, HDMI_H_SYNC_GEN_0, 3,
202 (t->hsyn_pol << 20) | (t->hsyn.end << 10) | t->hsyn.beg);
203 hdmi_writeb(hdev, HDMI_VSYNC_POL, t->vsyn_pol);
204 hdmi_writebn(hdev, HDMI_V_BLANK_0, 3,
205 (t->vact[0].beg << 11) | t->vact[0].end);
206 hdmi_writebn(hdev, HDMI_V_SYNC_GEN_1_0, 3,
207 (t->vsyn[0].beg << 12) | t->vsyn[0].end);
208 if (t->interlaced) {
209 u32 vsyn_trans = t->hsyn.beg + t->vsyn_off;
210
211 hdmi_writeb(hdev, HDMI_INT_PRO_MODE, 1);
212 hdmi_writebn(hdev, HDMI_H_V_LINE_0, 3,
213 (t->hact.end << 12) | t->vact[1].end);
214 hdmi_writebn(hdev, HDMI_V_BLANK_F_0, 3,
215 (t->vact[1].end << 11) | t->vact[1].beg);
216 hdmi_writebn(hdev, HDMI_V_SYNC_GEN_2_0, 3,
217 (t->vsyn[1].beg << 12) | t->vsyn[1].end);
218 hdmi_writebn(hdev, HDMI_V_SYNC_GEN_3_0, 3,
219 (vsyn_trans << 12) | vsyn_trans);
220 } else {
221 hdmi_writeb(hdev, HDMI_INT_PRO_MODE, 0);
222 hdmi_writebn(hdev, HDMI_H_V_LINE_0, 3,
223 (t->hact.end << 12) | t->vact[0].end);
224 }
225
226 /* Timing generator registers */
227 hdmi_writebn(hdev, HDMI_TG_H_FSZ_L, 2, t->hact.end);
228 hdmi_writebn(hdev, HDMI_TG_HACT_ST_L, 2, t->hact.beg);
229 hdmi_writebn(hdev, HDMI_TG_HACT_SZ_L, 2, t->hact.end - t->hact.beg);
230 hdmi_writebn(hdev, HDMI_TG_VSYNC_L, 2, t->vsyn[0].beg);
231 hdmi_writebn(hdev, HDMI_TG_VACT_ST_L, 2, t->vact[0].beg);
232 hdmi_writebn(hdev, HDMI_TG_VACT_SZ_L, 2,
233 t->vact[0].end - t->vact[0].beg);
234 hdmi_writebn(hdev, HDMI_TG_VSYNC_TOP_HDMI_L, 2, t->vsyn[0].beg);
235 hdmi_writebn(hdev, HDMI_TG_FIELD_TOP_HDMI_L, 2, t->vsyn[0].beg);
236 if (t->interlaced) {
237 hdmi_write_mask(hdev, HDMI_TG_CMD, ~0, HDMI_TG_FIELD_EN);
238 hdmi_writebn(hdev, HDMI_TG_V_FSZ_L, 2, t->vact[1].end);
239 hdmi_writebn(hdev, HDMI_TG_VSYNC2_L, 2, t->vsyn[1].beg);
240 hdmi_writebn(hdev, HDMI_TG_FIELD_CHG_L, 2, t->vact[0].end);
241 hdmi_writebn(hdev, HDMI_TG_VACT_ST2_L, 2, t->vact[1].beg);
242 hdmi_writebn(hdev, HDMI_TG_VSYNC_BOT_HDMI_L, 2, t->vsyn[1].beg);
243 hdmi_writebn(hdev, HDMI_TG_FIELD_BOT_HDMI_L, 2, t->vsyn[1].beg);
244 } else {
245 hdmi_write_mask(hdev, HDMI_TG_CMD, 0, HDMI_TG_FIELD_EN);
246 hdmi_writebn(hdev, HDMI_TG_V_FSZ_L, 2, t->vact[0].end);
247 }
248 }
249
hdmi_conf_apply(struct hdmi_device * hdmi_dev)250 static int hdmi_conf_apply(struct hdmi_device *hdmi_dev)
251 {
252 struct device *dev = hdmi_dev->dev;
253 const struct hdmi_timings *conf = hdmi_dev->cur_conf;
254 int ret;
255
256 dev_dbg(dev, "%s\n", __func__);
257
258 /* skip if conf is already synchronized with HW */
259 if (!hdmi_dev->cur_conf_dirty)
260 return 0;
261
262 /* reset hdmiphy */
263 hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT, ~0, HDMI_PHY_SW_RSTOUT);
264 mdelay(10);
265 hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT, 0, HDMI_PHY_SW_RSTOUT);
266 mdelay(10);
267
268 /* configure timings */
269 ret = v4l2_subdev_call(hdmi_dev->phy_sd, video, s_dv_timings,
270 &hdmi_dev->cur_timings);
271 if (ret) {
272 dev_err(dev, "failed to set timings\n");
273 return ret;
274 }
275
276 /* resetting HDMI core */
277 hdmi_write_mask(hdmi_dev, HDMI_CORE_RSTOUT, 0, HDMI_CORE_SW_RSTOUT);
278 mdelay(10);
279 hdmi_write_mask(hdmi_dev, HDMI_CORE_RSTOUT, ~0, HDMI_CORE_SW_RSTOUT);
280 mdelay(10);
281
282 hdmi_reg_init(hdmi_dev);
283
284 /* setting core registers */
285 hdmi_timing_apply(hdmi_dev, conf);
286
287 hdmi_dev->cur_conf_dirty = 0;
288
289 return 0;
290 }
291
hdmi_dumpregs(struct hdmi_device * hdev,char * prefix)292 static void hdmi_dumpregs(struct hdmi_device *hdev, char *prefix)
293 {
294 #define DUMPREG(reg_id) \
295 dev_dbg(hdev->dev, "%s:" #reg_id " = %08x\n", prefix, \
296 readl(hdev->regs + reg_id))
297
298 dev_dbg(hdev->dev, "%s: ---- CONTROL REGISTERS ----\n", prefix);
299 DUMPREG(HDMI_INTC_FLAG);
300 DUMPREG(HDMI_INTC_CON);
301 DUMPREG(HDMI_HPD_STATUS);
302 DUMPREG(HDMI_PHY_RSTOUT);
303 DUMPREG(HDMI_PHY_VPLL);
304 DUMPREG(HDMI_PHY_CMU);
305 DUMPREG(HDMI_CORE_RSTOUT);
306
307 dev_dbg(hdev->dev, "%s: ---- CORE REGISTERS ----\n", prefix);
308 DUMPREG(HDMI_CON_0);
309 DUMPREG(HDMI_CON_1);
310 DUMPREG(HDMI_CON_2);
311 DUMPREG(HDMI_SYS_STATUS);
312 DUMPREG(HDMI_PHY_STATUS);
313 DUMPREG(HDMI_STATUS_EN);
314 DUMPREG(HDMI_HPD);
315 DUMPREG(HDMI_MODE_SEL);
316 DUMPREG(HDMI_HPD_GEN);
317 DUMPREG(HDMI_DC_CONTROL);
318 DUMPREG(HDMI_VIDEO_PATTERN_GEN);
319
320 dev_dbg(hdev->dev, "%s: ---- CORE SYNC REGISTERS ----\n", prefix);
321 DUMPREG(HDMI_H_BLANK_0);
322 DUMPREG(HDMI_H_BLANK_1);
323 DUMPREG(HDMI_V_BLANK_0);
324 DUMPREG(HDMI_V_BLANK_1);
325 DUMPREG(HDMI_V_BLANK_2);
326 DUMPREG(HDMI_H_V_LINE_0);
327 DUMPREG(HDMI_H_V_LINE_1);
328 DUMPREG(HDMI_H_V_LINE_2);
329 DUMPREG(HDMI_VSYNC_POL);
330 DUMPREG(HDMI_INT_PRO_MODE);
331 DUMPREG(HDMI_V_BLANK_F_0);
332 DUMPREG(HDMI_V_BLANK_F_1);
333 DUMPREG(HDMI_V_BLANK_F_2);
334 DUMPREG(HDMI_H_SYNC_GEN_0);
335 DUMPREG(HDMI_H_SYNC_GEN_1);
336 DUMPREG(HDMI_H_SYNC_GEN_2);
337 DUMPREG(HDMI_V_SYNC_GEN_1_0);
338 DUMPREG(HDMI_V_SYNC_GEN_1_1);
339 DUMPREG(HDMI_V_SYNC_GEN_1_2);
340 DUMPREG(HDMI_V_SYNC_GEN_2_0);
341 DUMPREG(HDMI_V_SYNC_GEN_2_1);
342 DUMPREG(HDMI_V_SYNC_GEN_2_2);
343 DUMPREG(HDMI_V_SYNC_GEN_3_0);
344 DUMPREG(HDMI_V_SYNC_GEN_3_1);
345 DUMPREG(HDMI_V_SYNC_GEN_3_2);
346
347 dev_dbg(hdev->dev, "%s: ---- TG REGISTERS ----\n", prefix);
348 DUMPREG(HDMI_TG_CMD);
349 DUMPREG(HDMI_TG_H_FSZ_L);
350 DUMPREG(HDMI_TG_H_FSZ_H);
351 DUMPREG(HDMI_TG_HACT_ST_L);
352 DUMPREG(HDMI_TG_HACT_ST_H);
353 DUMPREG(HDMI_TG_HACT_SZ_L);
354 DUMPREG(HDMI_TG_HACT_SZ_H);
355 DUMPREG(HDMI_TG_V_FSZ_L);
356 DUMPREG(HDMI_TG_V_FSZ_H);
357 DUMPREG(HDMI_TG_VSYNC_L);
358 DUMPREG(HDMI_TG_VSYNC_H);
359 DUMPREG(HDMI_TG_VSYNC2_L);
360 DUMPREG(HDMI_TG_VSYNC2_H);
361 DUMPREG(HDMI_TG_VACT_ST_L);
362 DUMPREG(HDMI_TG_VACT_ST_H);
363 DUMPREG(HDMI_TG_VACT_SZ_L);
364 DUMPREG(HDMI_TG_VACT_SZ_H);
365 DUMPREG(HDMI_TG_FIELD_CHG_L);
366 DUMPREG(HDMI_TG_FIELD_CHG_H);
367 DUMPREG(HDMI_TG_VACT_ST2_L);
368 DUMPREG(HDMI_TG_VACT_ST2_H);
369 DUMPREG(HDMI_TG_VSYNC_TOP_HDMI_L);
370 DUMPREG(HDMI_TG_VSYNC_TOP_HDMI_H);
371 DUMPREG(HDMI_TG_VSYNC_BOT_HDMI_L);
372 DUMPREG(HDMI_TG_VSYNC_BOT_HDMI_H);
373 DUMPREG(HDMI_TG_FIELD_TOP_HDMI_L);
374 DUMPREG(HDMI_TG_FIELD_TOP_HDMI_H);
375 DUMPREG(HDMI_TG_FIELD_BOT_HDMI_L);
376 DUMPREG(HDMI_TG_FIELD_BOT_HDMI_H);
377 #undef DUMPREG
378 }
379
380 static const struct hdmi_timings hdmi_timings_480p = {
381 .hact = { .beg = 138, .end = 858 },
382 .hsyn_pol = 1,
383 .hsyn = { .beg = 16, .end = 16 + 62 },
384 .interlaced = 0,
385 .vact[0] = { .beg = 42 + 3, .end = 522 + 3 },
386 .vsyn_pol = 1,
387 .vsyn[0] = { .beg = 6 + 3, .end = 12 + 3},
388 };
389
390 static const struct hdmi_timings hdmi_timings_576p50 = {
391 .hact = { .beg = 144, .end = 864 },
392 .hsyn_pol = 1,
393 .hsyn = { .beg = 12, .end = 12 + 64 },
394 .interlaced = 0,
395 .vact[0] = { .beg = 44 + 5, .end = 620 + 5 },
396 .vsyn_pol = 1,
397 .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
398 };
399
400 static const struct hdmi_timings hdmi_timings_720p60 = {
401 .hact = { .beg = 370, .end = 1650 },
402 .hsyn_pol = 0,
403 .hsyn = { .beg = 110, .end = 110 + 40 },
404 .interlaced = 0,
405 .vact[0] = { .beg = 25 + 5, .end = 745 + 5 },
406 .vsyn_pol = 0,
407 .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
408 };
409
410 static const struct hdmi_timings hdmi_timings_720p50 = {
411 .hact = { .beg = 700, .end = 1980 },
412 .hsyn_pol = 0,
413 .hsyn = { .beg = 440, .end = 440 + 40 },
414 .interlaced = 0,
415 .vact[0] = { .beg = 25 + 5, .end = 745 + 5 },
416 .vsyn_pol = 0,
417 .vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
418 };
419
420 static const struct hdmi_timings hdmi_timings_1080p24 = {
421 .hact = { .beg = 830, .end = 2750 },
422 .hsyn_pol = 0,
423 .hsyn = { .beg = 638, .end = 638 + 44 },
424 .interlaced = 0,
425 .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
426 .vsyn_pol = 0,
427 .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
428 };
429
430 static const struct hdmi_timings hdmi_timings_1080p60 = {
431 .hact = { .beg = 280, .end = 2200 },
432 .hsyn_pol = 0,
433 .hsyn = { .beg = 88, .end = 88 + 44 },
434 .interlaced = 0,
435 .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
436 .vsyn_pol = 0,
437 .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
438 };
439
440 static const struct hdmi_timings hdmi_timings_1080i60 = {
441 .hact = { .beg = 280, .end = 2200 },
442 .hsyn_pol = 0,
443 .hsyn = { .beg = 88, .end = 88 + 44 },
444 .interlaced = 1,
445 .vact[0] = { .beg = 20 + 2, .end = 560 + 2 },
446 .vact[1] = { .beg = 583 + 2, .end = 1123 + 2 },
447 .vsyn_pol = 0,
448 .vsyn_off = 1100,
449 .vsyn[0] = { .beg = 0 + 2, .end = 5 + 2},
450 .vsyn[1] = { .beg = 562 + 2, .end = 567 + 2},
451 };
452
453 static const struct hdmi_timings hdmi_timings_1080i50 = {
454 .hact = { .beg = 720, .end = 2640 },
455 .hsyn_pol = 0,
456 .hsyn = { .beg = 528, .end = 528 + 44 },
457 .interlaced = 1,
458 .vact[0] = { .beg = 20 + 2, .end = 560 + 2 },
459 .vact[1] = { .beg = 583 + 2, .end = 1123 + 2 },
460 .vsyn_pol = 0,
461 .vsyn_off = 1320,
462 .vsyn[0] = { .beg = 0 + 2, .end = 5 + 2},
463 .vsyn[1] = { .beg = 562 + 2, .end = 567 + 2},
464 };
465
466 static const struct hdmi_timings hdmi_timings_1080p50 = {
467 .hact = { .beg = 720, .end = 2640 },
468 .hsyn_pol = 0,
469 .hsyn = { .beg = 528, .end = 528 + 44 },
470 .interlaced = 0,
471 .vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
472 .vsyn_pol = 0,
473 .vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
474 };
475
476 /* default hdmi_timings index of the timings configured on probe */
477 #define HDMI_DEFAULT_TIMINGS_IDX (0)
478
479 static const struct {
480 bool reduced_fps;
481 const struct v4l2_dv_timings dv_timings;
482 const struct hdmi_timings *hdmi_timings;
483 } hdmi_timings[] = {
484 { false, V4L2_DV_BT_CEA_720X480P59_94, &hdmi_timings_480p },
485 { false, V4L2_DV_BT_CEA_720X576P50, &hdmi_timings_576p50 },
486 { false, V4L2_DV_BT_CEA_1280X720P50, &hdmi_timings_720p50 },
487 { true, V4L2_DV_BT_CEA_1280X720P60, &hdmi_timings_720p60 },
488 { false, V4L2_DV_BT_CEA_1920X1080P24, &hdmi_timings_1080p24 },
489 { false, V4L2_DV_BT_CEA_1920X1080P30, &hdmi_timings_1080p60 },
490 { false, V4L2_DV_BT_CEA_1920X1080P50, &hdmi_timings_1080p50 },
491 { false, V4L2_DV_BT_CEA_1920X1080I50, &hdmi_timings_1080i50 },
492 { false, V4L2_DV_BT_CEA_1920X1080I60, &hdmi_timings_1080i60 },
493 { false, V4L2_DV_BT_CEA_1920X1080P60, &hdmi_timings_1080p60 },
494 };
495
hdmi_streamon(struct hdmi_device * hdev)496 static int hdmi_streamon(struct hdmi_device *hdev)
497 {
498 struct device *dev = hdev->dev;
499 struct hdmi_resources *res = &hdev->res;
500 int ret, tries;
501
502 dev_dbg(dev, "%s\n", __func__);
503
504 ret = hdmi_conf_apply(hdev);
505 if (ret)
506 return ret;
507
508 ret = v4l2_subdev_call(hdev->phy_sd, video, s_stream, 1);
509 if (ret)
510 return ret;
511
512 /* waiting for HDMIPHY's PLL to get to steady state */
513 for (tries = 100; tries; --tries) {
514 u32 val = hdmi_read(hdev, HDMI_PHY_STATUS);
515 if (val & HDMI_PHY_STATUS_READY)
516 break;
517 mdelay(1);
518 }
519 /* steady state not achieved */
520 if (tries == 0) {
521 dev_err(dev, "hdmiphy's pll could not reach steady state.\n");
522 v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
523 hdmi_dumpregs(hdev, "hdmiphy - s_stream");
524 return -EIO;
525 }
526
527 /* starting MHL */
528 ret = v4l2_subdev_call(hdev->mhl_sd, video, s_stream, 1);
529 if (hdev->mhl_sd && ret) {
530 v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
531 hdmi_dumpregs(hdev, "mhl - s_stream");
532 return -EIO;
533 }
534
535 /* hdmiphy clock is used for HDMI in streaming mode */
536 clk_disable(res->sclk_hdmi);
537 clk_set_parent(res->sclk_hdmi, res->sclk_hdmiphy);
538 clk_enable(res->sclk_hdmi);
539
540 /* enable HDMI and timing generator */
541 hdmi_write_mask(hdev, HDMI_CON_0, ~0, HDMI_EN);
542 hdmi_write_mask(hdev, HDMI_TG_CMD, ~0, HDMI_TG_EN);
543 hdmi_dumpregs(hdev, "streamon");
544 return 0;
545 }
546
hdmi_streamoff(struct hdmi_device * hdev)547 static int hdmi_streamoff(struct hdmi_device *hdev)
548 {
549 struct device *dev = hdev->dev;
550 struct hdmi_resources *res = &hdev->res;
551
552 dev_dbg(dev, "%s\n", __func__);
553
554 hdmi_write_mask(hdev, HDMI_CON_0, 0, HDMI_EN);
555 hdmi_write_mask(hdev, HDMI_TG_CMD, 0, HDMI_TG_EN);
556
557 /* pixel(vpll) clock is used for HDMI in config mode */
558 clk_disable(res->sclk_hdmi);
559 clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
560 clk_enable(res->sclk_hdmi);
561
562 v4l2_subdev_call(hdev->mhl_sd, video, s_stream, 0);
563 v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
564
565 hdmi_dumpregs(hdev, "streamoff");
566 return 0;
567 }
568
hdmi_s_stream(struct v4l2_subdev * sd,int enable)569 static int hdmi_s_stream(struct v4l2_subdev *sd, int enable)
570 {
571 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
572 struct device *dev = hdev->dev;
573
574 dev_dbg(dev, "%s(%d)\n", __func__, enable);
575 if (enable)
576 return hdmi_streamon(hdev);
577 return hdmi_streamoff(hdev);
578 }
579
hdmi_resource_poweron(struct hdmi_resources * res)580 static int hdmi_resource_poweron(struct hdmi_resources *res)
581 {
582 int ret;
583
584 /* turn HDMI power on */
585 ret = regulator_bulk_enable(res->regul_count, res->regul_bulk);
586 if (ret < 0)
587 return ret;
588 /* power-on hdmi physical interface */
589 clk_enable(res->hdmiphy);
590 /* use VPP as parent clock; HDMIPHY is not working yet */
591 clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
592 /* turn clocks on */
593 clk_enable(res->sclk_hdmi);
594
595 return 0;
596 }
597
hdmi_resource_poweroff(struct hdmi_resources * res)598 static void hdmi_resource_poweroff(struct hdmi_resources *res)
599 {
600 /* turn clocks off */
601 clk_disable(res->sclk_hdmi);
602 /* power-off hdmiphy */
603 clk_disable(res->hdmiphy);
604 /* turn HDMI power off */
605 regulator_bulk_disable(res->regul_count, res->regul_bulk);
606 }
607
hdmi_s_power(struct v4l2_subdev * sd,int on)608 static int hdmi_s_power(struct v4l2_subdev *sd, int on)
609 {
610 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
611 int ret;
612
613 if (on)
614 ret = pm_runtime_get_sync(hdev->dev);
615 else
616 ret = pm_runtime_put_sync(hdev->dev);
617 /* only values < 0 indicate errors */
618 return ret < 0 ? ret : 0;
619 }
620
hdmi_s_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)621 static int hdmi_s_dv_timings(struct v4l2_subdev *sd,
622 struct v4l2_dv_timings *timings)
623 {
624 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
625 struct device *dev = hdev->dev;
626 int i;
627
628 for (i = 0; i < ARRAY_SIZE(hdmi_timings); i++)
629 if (v4l2_match_dv_timings(&hdmi_timings[i].dv_timings,
630 timings, 0))
631 break;
632 if (i == ARRAY_SIZE(hdmi_timings)) {
633 dev_err(dev, "timings not supported\n");
634 return -EINVAL;
635 }
636 hdev->cur_conf = hdmi_timings[i].hdmi_timings;
637 hdev->cur_conf_dirty = 1;
638 hdev->cur_timings = *timings;
639 if (!hdmi_timings[i].reduced_fps)
640 hdev->cur_timings.bt.flags &= ~V4L2_DV_FL_CAN_REDUCE_FPS;
641 return 0;
642 }
643
hdmi_g_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)644 static int hdmi_g_dv_timings(struct v4l2_subdev *sd,
645 struct v4l2_dv_timings *timings)
646 {
647 *timings = sd_to_hdmi_dev(sd)->cur_timings;
648 return 0;
649 }
650
hdmi_g_mbus_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * fmt)651 static int hdmi_g_mbus_fmt(struct v4l2_subdev *sd,
652 struct v4l2_mbus_framefmt *fmt)
653 {
654 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
655 const struct hdmi_timings *t = hdev->cur_conf;
656
657 dev_dbg(hdev->dev, "%s\n", __func__);
658 if (!hdev->cur_conf)
659 return -EINVAL;
660 memset(fmt, 0, sizeof(*fmt));
661 fmt->width = t->hact.end - t->hact.beg;
662 fmt->height = t->vact[0].end - t->vact[0].beg;
663 fmt->code = MEDIA_BUS_FMT_FIXED; /* means RGB888 */
664 fmt->colorspace = V4L2_COLORSPACE_SRGB;
665 if (t->interlaced) {
666 fmt->field = V4L2_FIELD_INTERLACED;
667 fmt->height *= 2;
668 } else {
669 fmt->field = V4L2_FIELD_NONE;
670 }
671 return 0;
672 }
673
hdmi_enum_dv_timings(struct v4l2_subdev * sd,struct v4l2_enum_dv_timings * timings)674 static int hdmi_enum_dv_timings(struct v4l2_subdev *sd,
675 struct v4l2_enum_dv_timings *timings)
676 {
677 if (timings->pad != 0)
678 return -EINVAL;
679 if (timings->index >= ARRAY_SIZE(hdmi_timings))
680 return -EINVAL;
681 timings->timings = hdmi_timings[timings->index].dv_timings;
682 if (!hdmi_timings[timings->index].reduced_fps)
683 timings->timings.bt.flags &= ~V4L2_DV_FL_CAN_REDUCE_FPS;
684 return 0;
685 }
686
hdmi_dv_timings_cap(struct v4l2_subdev * sd,struct v4l2_dv_timings_cap * cap)687 static int hdmi_dv_timings_cap(struct v4l2_subdev *sd,
688 struct v4l2_dv_timings_cap *cap)
689 {
690 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
691
692 if (cap->pad != 0)
693 return -EINVAL;
694
695 /* Let the phy fill in the pixelclock range */
696 v4l2_subdev_call(hdev->phy_sd, pad, dv_timings_cap, cap);
697 cap->type = V4L2_DV_BT_656_1120;
698 cap->bt.min_width = 720;
699 cap->bt.max_width = 1920;
700 cap->bt.min_height = 480;
701 cap->bt.max_height = 1080;
702 cap->bt.standards = V4L2_DV_BT_STD_CEA861;
703 cap->bt.capabilities = V4L2_DV_BT_CAP_INTERLACED |
704 V4L2_DV_BT_CAP_PROGRESSIVE;
705 return 0;
706 }
707
708 static const struct v4l2_subdev_core_ops hdmi_sd_core_ops = {
709 .s_power = hdmi_s_power,
710 };
711
712 static const struct v4l2_subdev_video_ops hdmi_sd_video_ops = {
713 .s_dv_timings = hdmi_s_dv_timings,
714 .g_dv_timings = hdmi_g_dv_timings,
715 .g_mbus_fmt = hdmi_g_mbus_fmt,
716 .s_stream = hdmi_s_stream,
717 };
718
719 static const struct v4l2_subdev_pad_ops hdmi_sd_pad_ops = {
720 .enum_dv_timings = hdmi_enum_dv_timings,
721 .dv_timings_cap = hdmi_dv_timings_cap,
722 };
723
724 static const struct v4l2_subdev_ops hdmi_sd_ops = {
725 .core = &hdmi_sd_core_ops,
726 .video = &hdmi_sd_video_ops,
727 };
728
hdmi_runtime_suspend(struct device * dev)729 static int hdmi_runtime_suspend(struct device *dev)
730 {
731 struct v4l2_subdev *sd = dev_get_drvdata(dev);
732 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
733
734 dev_dbg(dev, "%s\n", __func__);
735 v4l2_subdev_call(hdev->mhl_sd, core, s_power, 0);
736 hdmi_resource_poweroff(&hdev->res);
737 /* flag that device context is lost */
738 hdev->cur_conf_dirty = 1;
739 return 0;
740 }
741
hdmi_runtime_resume(struct device * dev)742 static int hdmi_runtime_resume(struct device *dev)
743 {
744 struct v4l2_subdev *sd = dev_get_drvdata(dev);
745 struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
746 int ret;
747
748 dev_dbg(dev, "%s\n", __func__);
749
750 ret = hdmi_resource_poweron(&hdev->res);
751 if (ret < 0)
752 return ret;
753
754 /* starting MHL */
755 ret = v4l2_subdev_call(hdev->mhl_sd, core, s_power, 1);
756 if (hdev->mhl_sd && ret)
757 goto fail;
758
759 dev_dbg(dev, "poweron succeed\n");
760
761 return 0;
762
763 fail:
764 hdmi_resource_poweroff(&hdev->res);
765 dev_err(dev, "poweron failed\n");
766
767 return ret;
768 }
769
770 static const struct dev_pm_ops hdmi_pm_ops = {
771 .runtime_suspend = hdmi_runtime_suspend,
772 .runtime_resume = hdmi_runtime_resume,
773 };
774
hdmi_resource_clear_clocks(struct hdmi_resources * res)775 static void hdmi_resource_clear_clocks(struct hdmi_resources *res)
776 {
777 res->hdmi = ERR_PTR(-EINVAL);
778 res->sclk_hdmi = ERR_PTR(-EINVAL);
779 res->sclk_pixel = ERR_PTR(-EINVAL);
780 res->sclk_hdmiphy = ERR_PTR(-EINVAL);
781 res->hdmiphy = ERR_PTR(-EINVAL);
782 }
783
hdmi_resources_cleanup(struct hdmi_device * hdev)784 static void hdmi_resources_cleanup(struct hdmi_device *hdev)
785 {
786 struct hdmi_resources *res = &hdev->res;
787
788 dev_dbg(hdev->dev, "HDMI resource cleanup\n");
789 /* put clocks, power */
790 if (res->regul_count)
791 regulator_bulk_free(res->regul_count, res->regul_bulk);
792 /* kfree is NULL-safe */
793 kfree(res->regul_bulk);
794 if (!IS_ERR(res->hdmiphy))
795 clk_put(res->hdmiphy);
796 if (!IS_ERR(res->sclk_hdmiphy))
797 clk_put(res->sclk_hdmiphy);
798 if (!IS_ERR(res->sclk_pixel))
799 clk_put(res->sclk_pixel);
800 if (!IS_ERR(res->sclk_hdmi))
801 clk_put(res->sclk_hdmi);
802 if (!IS_ERR(res->hdmi))
803 clk_put(res->hdmi);
804 memset(res, 0, sizeof(*res));
805 hdmi_resource_clear_clocks(res);
806 }
807
hdmi_resources_init(struct hdmi_device * hdev)808 static int hdmi_resources_init(struct hdmi_device *hdev)
809 {
810 struct device *dev = hdev->dev;
811 struct hdmi_resources *res = &hdev->res;
812 static char *supply[] = {
813 "hdmi-en",
814 "vdd",
815 "vdd_osc",
816 "vdd_pll",
817 };
818 int i, ret;
819
820 dev_dbg(dev, "HDMI resource init\n");
821
822 memset(res, 0, sizeof(*res));
823 hdmi_resource_clear_clocks(res);
824
825 /* get clocks, power */
826 res->hdmi = clk_get(dev, "hdmi");
827 if (IS_ERR(res->hdmi)) {
828 dev_err(dev, "failed to get clock 'hdmi'\n");
829 goto fail;
830 }
831 res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
832 if (IS_ERR(res->sclk_hdmi)) {
833 dev_err(dev, "failed to get clock 'sclk_hdmi'\n");
834 goto fail;
835 }
836 res->sclk_pixel = clk_get(dev, "sclk_pixel");
837 if (IS_ERR(res->sclk_pixel)) {
838 dev_err(dev, "failed to get clock 'sclk_pixel'\n");
839 goto fail;
840 }
841 res->sclk_hdmiphy = clk_get(dev, "sclk_hdmiphy");
842 if (IS_ERR(res->sclk_hdmiphy)) {
843 dev_err(dev, "failed to get clock 'sclk_hdmiphy'\n");
844 goto fail;
845 }
846 res->hdmiphy = clk_get(dev, "hdmiphy");
847 if (IS_ERR(res->hdmiphy)) {
848 dev_err(dev, "failed to get clock 'hdmiphy'\n");
849 goto fail;
850 }
851 res->regul_bulk = kcalloc(ARRAY_SIZE(supply),
852 sizeof(res->regul_bulk[0]), GFP_KERNEL);
853 if (!res->regul_bulk) {
854 dev_err(dev, "failed to get memory for regulators\n");
855 goto fail;
856 }
857 for (i = 0; i < ARRAY_SIZE(supply); ++i) {
858 res->regul_bulk[i].supply = supply[i];
859 res->regul_bulk[i].consumer = NULL;
860 }
861
862 ret = regulator_bulk_get(dev, ARRAY_SIZE(supply), res->regul_bulk);
863 if (ret) {
864 dev_err(dev, "failed to get regulators\n");
865 goto fail;
866 }
867 res->regul_count = ARRAY_SIZE(supply);
868
869 return 0;
870 fail:
871 dev_err(dev, "HDMI resource init - failed\n");
872 hdmi_resources_cleanup(hdev);
873 return -ENODEV;
874 }
875
hdmi_probe(struct platform_device * pdev)876 static int hdmi_probe(struct platform_device *pdev)
877 {
878 struct device *dev = &pdev->dev;
879 struct resource *res;
880 struct i2c_adapter *adapter;
881 struct v4l2_subdev *sd;
882 struct hdmi_device *hdmi_dev = NULL;
883 struct s5p_hdmi_platform_data *pdata = dev->platform_data;
884 int ret;
885
886 dev_dbg(dev, "probe start\n");
887
888 if (!pdata) {
889 dev_err(dev, "platform data is missing\n");
890 ret = -ENODEV;
891 goto fail;
892 }
893
894 hdmi_dev = devm_kzalloc(&pdev->dev, sizeof(*hdmi_dev), GFP_KERNEL);
895 if (!hdmi_dev) {
896 dev_err(dev, "out of memory\n");
897 ret = -ENOMEM;
898 goto fail;
899 }
900
901 hdmi_dev->dev = dev;
902
903 ret = hdmi_resources_init(hdmi_dev);
904 if (ret)
905 goto fail;
906
907 /* mapping HDMI registers */
908 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
909 if (res == NULL) {
910 dev_err(dev, "get memory resource failed.\n");
911 ret = -ENXIO;
912 goto fail_init;
913 }
914
915 hdmi_dev->regs = devm_ioremap(&pdev->dev, res->start,
916 resource_size(res));
917 if (hdmi_dev->regs == NULL) {
918 dev_err(dev, "register mapping failed.\n");
919 ret = -ENXIO;
920 goto fail_init;
921 }
922
923 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
924 if (res == NULL) {
925 dev_err(dev, "get interrupt resource failed.\n");
926 ret = -ENXIO;
927 goto fail_init;
928 }
929
930 ret = devm_request_irq(&pdev->dev, res->start, hdmi_irq_handler, 0,
931 "hdmi", hdmi_dev);
932 if (ret) {
933 dev_err(dev, "request interrupt failed.\n");
934 goto fail_init;
935 }
936 hdmi_dev->irq = res->start;
937
938 /* setting v4l2 name to prevent WARN_ON in v4l2_device_register */
939 strlcpy(hdmi_dev->v4l2_dev.name, dev_name(dev),
940 sizeof(hdmi_dev->v4l2_dev.name));
941 /* passing NULL owner prevents driver from erasing drvdata */
942 ret = v4l2_device_register(NULL, &hdmi_dev->v4l2_dev);
943 if (ret) {
944 dev_err(dev, "could not register v4l2 device.\n");
945 goto fail_init;
946 }
947
948 /* testing if hdmiphy info is present */
949 if (!pdata->hdmiphy_info) {
950 dev_err(dev, "hdmiphy info is missing in platform data\n");
951 ret = -ENXIO;
952 goto fail_vdev;
953 }
954
955 adapter = i2c_get_adapter(pdata->hdmiphy_bus);
956 if (adapter == NULL) {
957 dev_err(dev, "hdmiphy adapter request failed\n");
958 ret = -ENXIO;
959 goto fail_vdev;
960 }
961
962 hdmi_dev->phy_sd = v4l2_i2c_new_subdev_board(&hdmi_dev->v4l2_dev,
963 adapter, pdata->hdmiphy_info, NULL);
964 /* on failure or not adapter is no longer useful */
965 i2c_put_adapter(adapter);
966 if (hdmi_dev->phy_sd == NULL) {
967 dev_err(dev, "missing subdev for hdmiphy\n");
968 ret = -ENODEV;
969 goto fail_vdev;
970 }
971
972 /* initialization of MHL interface if present */
973 if (pdata->mhl_info) {
974 adapter = i2c_get_adapter(pdata->mhl_bus);
975 if (adapter == NULL) {
976 dev_err(dev, "MHL adapter request failed\n");
977 ret = -ENXIO;
978 goto fail_vdev;
979 }
980
981 hdmi_dev->mhl_sd = v4l2_i2c_new_subdev_board(
982 &hdmi_dev->v4l2_dev, adapter,
983 pdata->mhl_info, NULL);
984 /* on failure or not adapter is no longer useful */
985 i2c_put_adapter(adapter);
986 if (hdmi_dev->mhl_sd == NULL) {
987 dev_err(dev, "missing subdev for MHL\n");
988 ret = -ENODEV;
989 goto fail_vdev;
990 }
991 }
992
993 clk_enable(hdmi_dev->res.hdmi);
994
995 pm_runtime_enable(dev);
996
997 sd = &hdmi_dev->sd;
998 v4l2_subdev_init(sd, &hdmi_sd_ops);
999 sd->owner = THIS_MODULE;
1000
1001 strlcpy(sd->name, "s5p-hdmi", sizeof(sd->name));
1002 hdmi_dev->cur_timings =
1003 hdmi_timings[HDMI_DEFAULT_TIMINGS_IDX].dv_timings;
1004 /* FIXME: missing fail timings is not supported */
1005 hdmi_dev->cur_conf =
1006 hdmi_timings[HDMI_DEFAULT_TIMINGS_IDX].hdmi_timings;
1007 hdmi_dev->cur_conf_dirty = 1;
1008
1009 /* storing subdev for call that have only access to struct device */
1010 dev_set_drvdata(dev, sd);
1011
1012 dev_info(dev, "probe successful\n");
1013
1014 return 0;
1015
1016 fail_vdev:
1017 v4l2_device_unregister(&hdmi_dev->v4l2_dev);
1018
1019 fail_init:
1020 hdmi_resources_cleanup(hdmi_dev);
1021
1022 fail:
1023 dev_err(dev, "probe failed\n");
1024 return ret;
1025 }
1026
hdmi_remove(struct platform_device * pdev)1027 static int hdmi_remove(struct platform_device *pdev)
1028 {
1029 struct device *dev = &pdev->dev;
1030 struct v4l2_subdev *sd = dev_get_drvdata(dev);
1031 struct hdmi_device *hdmi_dev = sd_to_hdmi_dev(sd);
1032
1033 pm_runtime_disable(dev);
1034 clk_disable(hdmi_dev->res.hdmi);
1035 v4l2_device_unregister(&hdmi_dev->v4l2_dev);
1036 disable_irq(hdmi_dev->irq);
1037 hdmi_resources_cleanup(hdmi_dev);
1038 dev_info(dev, "remove successful\n");
1039
1040 return 0;
1041 }
1042
1043 static struct platform_driver hdmi_driver __refdata = {
1044 .probe = hdmi_probe,
1045 .remove = hdmi_remove,
1046 .id_table = hdmi_driver_types,
1047 .driver = {
1048 .name = "s5p-hdmi",
1049 .pm = &hdmi_pm_ops,
1050 }
1051 };
1052
1053 module_platform_driver(hdmi_driver);
1054