1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Analog Devices ADV7511 HDMI Transmitter Device Driver
4 *
5 * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
6 */
7
8
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/i2c.h>
13 #include <linux/delay.h>
14 #include <linux/videodev2.h>
15 #include <linux/gpio.h>
16 #include <linux/workqueue.h>
17 #include <linux/hdmi.h>
18 #include <linux/v4l2-dv-timings.h>
19 #include <media/v4l2-device.h>
20 #include <media/v4l2-common.h>
21 #include <media/v4l2-ctrls.h>
22 #include <media/v4l2-dv-timings.h>
23 #include <media/i2c/adv7511.h>
24 #include <media/cec.h>
25
26 static int debug;
27 module_param(debug, int, 0644);
28 MODULE_PARM_DESC(debug, "debug level (0-2)");
29
30 MODULE_DESCRIPTION("Analog Devices ADV7511 HDMI Transmitter Device Driver");
31 MODULE_AUTHOR("Hans Verkuil");
32 MODULE_LICENSE("GPL v2");
33
34 #define MASK_ADV7511_EDID_RDY_INT 0x04
35 #define MASK_ADV7511_MSEN_INT 0x40
36 #define MASK_ADV7511_HPD_INT 0x80
37
38 #define MASK_ADV7511_HPD_DETECT 0x40
39 #define MASK_ADV7511_MSEN_DETECT 0x20
40 #define MASK_ADV7511_EDID_RDY 0x10
41
42 #define EDID_MAX_RETRIES (8)
43 #define EDID_DELAY 250
44 #define EDID_MAX_SEGM 8
45
46 #define ADV7511_MAX_WIDTH 1920
47 #define ADV7511_MAX_HEIGHT 1200
48 #define ADV7511_MIN_PIXELCLOCK 20000000
49 #define ADV7511_MAX_PIXELCLOCK 225000000
50
51 #define ADV7511_MAX_ADDRS (3)
52
53 /*
54 **********************************************************************
55 *
56 * Arrays with configuration parameters for the ADV7511
57 *
58 **********************************************************************
59 */
60
61 struct i2c_reg_value {
62 unsigned char reg;
63 unsigned char value;
64 };
65
66 struct adv7511_state_edid {
67 /* total number of blocks */
68 u32 blocks;
69 /* Number of segments read */
70 u32 segments;
71 u8 data[EDID_MAX_SEGM * 256];
72 /* Number of EDID read retries left */
73 unsigned read_retries;
74 bool complete;
75 };
76
77 struct adv7511_state {
78 struct adv7511_platform_data pdata;
79 struct v4l2_subdev sd;
80 struct media_pad pad;
81 struct v4l2_ctrl_handler hdl;
82 int chip_revision;
83 u8 i2c_edid_addr;
84 u8 i2c_pktmem_addr;
85 u8 i2c_cec_addr;
86
87 struct i2c_client *i2c_cec;
88 struct cec_adapter *cec_adap;
89 u8 cec_addr[ADV7511_MAX_ADDRS];
90 u8 cec_valid_addrs;
91 bool cec_enabled_adap;
92
93 /* Is the adv7511 powered on? */
94 bool power_on;
95 /* Did we receive hotplug and rx-sense signals? */
96 bool have_monitor;
97 bool enabled_irq;
98 /* timings from s_dv_timings */
99 struct v4l2_dv_timings dv_timings;
100 u32 fmt_code;
101 u32 colorspace;
102 u32 ycbcr_enc;
103 u32 quantization;
104 u32 xfer_func;
105 u32 content_type;
106 /* controls */
107 struct v4l2_ctrl *hdmi_mode_ctrl;
108 struct v4l2_ctrl *hotplug_ctrl;
109 struct v4l2_ctrl *rx_sense_ctrl;
110 struct v4l2_ctrl *have_edid0_ctrl;
111 struct v4l2_ctrl *rgb_quantization_range_ctrl;
112 struct v4l2_ctrl *content_type_ctrl;
113 struct i2c_client *i2c_edid;
114 struct i2c_client *i2c_pktmem;
115 struct adv7511_state_edid edid;
116 /* Running counter of the number of detected EDIDs (for debugging) */
117 unsigned edid_detect_counter;
118 struct workqueue_struct *work_queue;
119 struct delayed_work edid_handler; /* work entry */
120 };
121
122 static void adv7511_check_monitor_present_status(struct v4l2_subdev *sd);
123 static bool adv7511_check_edid_status(struct v4l2_subdev *sd);
124 static void adv7511_setup(struct v4l2_subdev *sd);
125 static int adv7511_s_i2s_clock_freq(struct v4l2_subdev *sd, u32 freq);
126 static int adv7511_s_clock_freq(struct v4l2_subdev *sd, u32 freq);
127
128
129 static const struct v4l2_dv_timings_cap adv7511_timings_cap = {
130 .type = V4L2_DV_BT_656_1120,
131 /* keep this initialization for compatibility with GCC < 4.4.6 */
132 .reserved = { 0 },
133 V4L2_INIT_BT_TIMINGS(0, ADV7511_MAX_WIDTH, 0, ADV7511_MAX_HEIGHT,
134 ADV7511_MIN_PIXELCLOCK, ADV7511_MAX_PIXELCLOCK,
135 V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
136 V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT,
137 V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_REDUCED_BLANKING |
138 V4L2_DV_BT_CAP_CUSTOM)
139 };
140
get_adv7511_state(struct v4l2_subdev * sd)141 static inline struct adv7511_state *get_adv7511_state(struct v4l2_subdev *sd)
142 {
143 return container_of(sd, struct adv7511_state, sd);
144 }
145
to_sd(struct v4l2_ctrl * ctrl)146 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
147 {
148 return &container_of(ctrl->handler, struct adv7511_state, hdl)->sd;
149 }
150
151 /* ------------------------ I2C ----------------------------------------------- */
152
adv_smbus_read_byte_data_check(struct i2c_client * client,u8 command,bool check)153 static s32 adv_smbus_read_byte_data_check(struct i2c_client *client,
154 u8 command, bool check)
155 {
156 union i2c_smbus_data data;
157
158 if (!i2c_smbus_xfer(client->adapter, client->addr, client->flags,
159 I2C_SMBUS_READ, command,
160 I2C_SMBUS_BYTE_DATA, &data))
161 return data.byte;
162 if (check)
163 v4l_err(client, "error reading %02x, %02x\n",
164 client->addr, command);
165 return -1;
166 }
167
adv_smbus_read_byte_data(struct i2c_client * client,u8 command)168 static s32 adv_smbus_read_byte_data(struct i2c_client *client, u8 command)
169 {
170 int i;
171 for (i = 0; i < 3; i++) {
172 int ret = adv_smbus_read_byte_data_check(client, command, true);
173 if (ret >= 0) {
174 if (i)
175 v4l_err(client, "read ok after %d retries\n", i);
176 return ret;
177 }
178 }
179 v4l_err(client, "read failed\n");
180 return -1;
181 }
182
adv7511_rd(struct v4l2_subdev * sd,u8 reg)183 static int adv7511_rd(struct v4l2_subdev *sd, u8 reg)
184 {
185 struct i2c_client *client = v4l2_get_subdevdata(sd);
186
187 return adv_smbus_read_byte_data(client, reg);
188 }
189
adv7511_wr(struct v4l2_subdev * sd,u8 reg,u8 val)190 static int adv7511_wr(struct v4l2_subdev *sd, u8 reg, u8 val)
191 {
192 struct i2c_client *client = v4l2_get_subdevdata(sd);
193 int ret;
194 int i;
195
196 for (i = 0; i < 3; i++) {
197 ret = i2c_smbus_write_byte_data(client, reg, val);
198 if (ret == 0)
199 return 0;
200 }
201 v4l2_err(sd, "%s: i2c write error\n", __func__);
202 return ret;
203 }
204
205 /* To set specific bits in the register, a clear-mask is given (to be AND-ed),
206 and then the value-mask (to be OR-ed). */
adv7511_wr_and_or(struct v4l2_subdev * sd,u8 reg,u8 clr_mask,u8 val_mask)207 static inline void adv7511_wr_and_or(struct v4l2_subdev *sd, u8 reg, u8 clr_mask, u8 val_mask)
208 {
209 adv7511_wr(sd, reg, (adv7511_rd(sd, reg) & clr_mask) | val_mask);
210 }
211
adv_smbus_read_i2c_block_data(struct i2c_client * client,u8 command,unsigned length,u8 * values)212 static int adv_smbus_read_i2c_block_data(struct i2c_client *client,
213 u8 command, unsigned length, u8 *values)
214 {
215 union i2c_smbus_data data;
216 int ret;
217
218 if (length > I2C_SMBUS_BLOCK_MAX)
219 length = I2C_SMBUS_BLOCK_MAX;
220 data.block[0] = length;
221
222 ret = i2c_smbus_xfer(client->adapter, client->addr, client->flags,
223 I2C_SMBUS_READ, command,
224 I2C_SMBUS_I2C_BLOCK_DATA, &data);
225 memcpy(values, data.block + 1, length);
226 return ret;
227 }
228
adv7511_edid_rd(struct v4l2_subdev * sd,uint16_t len,uint8_t * buf)229 static void adv7511_edid_rd(struct v4l2_subdev *sd, uint16_t len, uint8_t *buf)
230 {
231 struct adv7511_state *state = get_adv7511_state(sd);
232 int i;
233 int err = 0;
234
235 v4l2_dbg(1, debug, sd, "%s:\n", __func__);
236
237 for (i = 0; !err && i < len; i += I2C_SMBUS_BLOCK_MAX)
238 err = adv_smbus_read_i2c_block_data(state->i2c_edid, i,
239 I2C_SMBUS_BLOCK_MAX, buf + i);
240 if (err)
241 v4l2_err(sd, "%s: i2c read error\n", __func__);
242 }
243
adv7511_cec_read(struct v4l2_subdev * sd,u8 reg)244 static inline int adv7511_cec_read(struct v4l2_subdev *sd, u8 reg)
245 {
246 struct adv7511_state *state = get_adv7511_state(sd);
247
248 return i2c_smbus_read_byte_data(state->i2c_cec, reg);
249 }
250
adv7511_cec_write(struct v4l2_subdev * sd,u8 reg,u8 val)251 static int adv7511_cec_write(struct v4l2_subdev *sd, u8 reg, u8 val)
252 {
253 struct adv7511_state *state = get_adv7511_state(sd);
254 int ret;
255 int i;
256
257 for (i = 0; i < 3; i++) {
258 ret = i2c_smbus_write_byte_data(state->i2c_cec, reg, val);
259 if (ret == 0)
260 return 0;
261 }
262 v4l2_err(sd, "%s: I2C Write Problem\n", __func__);
263 return ret;
264 }
265
adv7511_cec_write_and_or(struct v4l2_subdev * sd,u8 reg,u8 mask,u8 val)266 static inline int adv7511_cec_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask,
267 u8 val)
268 {
269 return adv7511_cec_write(sd, reg, (adv7511_cec_read(sd, reg) & mask) | val);
270 }
271
adv7511_pktmem_rd(struct v4l2_subdev * sd,u8 reg)272 static int adv7511_pktmem_rd(struct v4l2_subdev *sd, u8 reg)
273 {
274 struct adv7511_state *state = get_adv7511_state(sd);
275
276 return adv_smbus_read_byte_data(state->i2c_pktmem, reg);
277 }
278
adv7511_pktmem_wr(struct v4l2_subdev * sd,u8 reg,u8 val)279 static int adv7511_pktmem_wr(struct v4l2_subdev *sd, u8 reg, u8 val)
280 {
281 struct adv7511_state *state = get_adv7511_state(sd);
282 int ret;
283 int i;
284
285 for (i = 0; i < 3; i++) {
286 ret = i2c_smbus_write_byte_data(state->i2c_pktmem, reg, val);
287 if (ret == 0)
288 return 0;
289 }
290 v4l2_err(sd, "%s: i2c write error\n", __func__);
291 return ret;
292 }
293
294 /* To set specific bits in the register, a clear-mask is given (to be AND-ed),
295 and then the value-mask (to be OR-ed). */
adv7511_pktmem_wr_and_or(struct v4l2_subdev * sd,u8 reg,u8 clr_mask,u8 val_mask)296 static inline void adv7511_pktmem_wr_and_or(struct v4l2_subdev *sd, u8 reg, u8 clr_mask, u8 val_mask)
297 {
298 adv7511_pktmem_wr(sd, reg, (adv7511_pktmem_rd(sd, reg) & clr_mask) | val_mask);
299 }
300
adv7511_have_hotplug(struct v4l2_subdev * sd)301 static inline bool adv7511_have_hotplug(struct v4l2_subdev *sd)
302 {
303 return adv7511_rd(sd, 0x42) & MASK_ADV7511_HPD_DETECT;
304 }
305
adv7511_have_rx_sense(struct v4l2_subdev * sd)306 static inline bool adv7511_have_rx_sense(struct v4l2_subdev *sd)
307 {
308 return adv7511_rd(sd, 0x42) & MASK_ADV7511_MSEN_DETECT;
309 }
310
adv7511_csc_conversion_mode(struct v4l2_subdev * sd,u8 mode)311 static void adv7511_csc_conversion_mode(struct v4l2_subdev *sd, u8 mode)
312 {
313 adv7511_wr_and_or(sd, 0x18, 0x9f, (mode & 0x3)<<5);
314 }
315
adv7511_csc_coeff(struct v4l2_subdev * sd,u16 A1,u16 A2,u16 A3,u16 A4,u16 B1,u16 B2,u16 B3,u16 B4,u16 C1,u16 C2,u16 C3,u16 C4)316 static void adv7511_csc_coeff(struct v4l2_subdev *sd,
317 u16 A1, u16 A2, u16 A3, u16 A4,
318 u16 B1, u16 B2, u16 B3, u16 B4,
319 u16 C1, u16 C2, u16 C3, u16 C4)
320 {
321 /* A */
322 adv7511_wr_and_or(sd, 0x18, 0xe0, A1>>8);
323 adv7511_wr(sd, 0x19, A1);
324 adv7511_wr_and_or(sd, 0x1A, 0xe0, A2>>8);
325 adv7511_wr(sd, 0x1B, A2);
326 adv7511_wr_and_or(sd, 0x1c, 0xe0, A3>>8);
327 adv7511_wr(sd, 0x1d, A3);
328 adv7511_wr_and_or(sd, 0x1e, 0xe0, A4>>8);
329 adv7511_wr(sd, 0x1f, A4);
330
331 /* B */
332 adv7511_wr_and_or(sd, 0x20, 0xe0, B1>>8);
333 adv7511_wr(sd, 0x21, B1);
334 adv7511_wr_and_or(sd, 0x22, 0xe0, B2>>8);
335 adv7511_wr(sd, 0x23, B2);
336 adv7511_wr_and_or(sd, 0x24, 0xe0, B3>>8);
337 adv7511_wr(sd, 0x25, B3);
338 adv7511_wr_and_or(sd, 0x26, 0xe0, B4>>8);
339 adv7511_wr(sd, 0x27, B4);
340
341 /* C */
342 adv7511_wr_and_or(sd, 0x28, 0xe0, C1>>8);
343 adv7511_wr(sd, 0x29, C1);
344 adv7511_wr_and_or(sd, 0x2A, 0xe0, C2>>8);
345 adv7511_wr(sd, 0x2B, C2);
346 adv7511_wr_and_or(sd, 0x2C, 0xe0, C3>>8);
347 adv7511_wr(sd, 0x2D, C3);
348 adv7511_wr_and_or(sd, 0x2E, 0xe0, C4>>8);
349 adv7511_wr(sd, 0x2F, C4);
350 }
351
adv7511_csc_rgb_full2limit(struct v4l2_subdev * sd,bool enable)352 static void adv7511_csc_rgb_full2limit(struct v4l2_subdev *sd, bool enable)
353 {
354 if (enable) {
355 u8 csc_mode = 0;
356 adv7511_csc_conversion_mode(sd, csc_mode);
357 adv7511_csc_coeff(sd,
358 4096-564, 0, 0, 256,
359 0, 4096-564, 0, 256,
360 0, 0, 4096-564, 256);
361 /* enable CSC */
362 adv7511_wr_and_or(sd, 0x18, 0x7f, 0x80);
363 /* AVI infoframe: Limited range RGB (16-235) */
364 adv7511_wr_and_or(sd, 0x57, 0xf3, 0x04);
365 } else {
366 /* disable CSC */
367 adv7511_wr_and_or(sd, 0x18, 0x7f, 0x0);
368 /* AVI infoframe: Full range RGB (0-255) */
369 adv7511_wr_and_or(sd, 0x57, 0xf3, 0x08);
370 }
371 }
372
adv7511_set_rgb_quantization_mode(struct v4l2_subdev * sd,struct v4l2_ctrl * ctrl)373 static void adv7511_set_rgb_quantization_mode(struct v4l2_subdev *sd, struct v4l2_ctrl *ctrl)
374 {
375 struct adv7511_state *state = get_adv7511_state(sd);
376
377 /* Only makes sense for RGB formats */
378 if (state->fmt_code != MEDIA_BUS_FMT_RGB888_1X24) {
379 /* so just keep quantization */
380 adv7511_csc_rgb_full2limit(sd, false);
381 return;
382 }
383
384 switch (ctrl->val) {
385 case V4L2_DV_RGB_RANGE_AUTO:
386 /* automatic */
387 if (state->dv_timings.bt.flags & V4L2_DV_FL_IS_CE_VIDEO) {
388 /* CE format, RGB limited range (16-235) */
389 adv7511_csc_rgb_full2limit(sd, true);
390 } else {
391 /* not CE format, RGB full range (0-255) */
392 adv7511_csc_rgb_full2limit(sd, false);
393 }
394 break;
395 case V4L2_DV_RGB_RANGE_LIMITED:
396 /* RGB limited range (16-235) */
397 adv7511_csc_rgb_full2limit(sd, true);
398 break;
399 case V4L2_DV_RGB_RANGE_FULL:
400 /* RGB full range (0-255) */
401 adv7511_csc_rgb_full2limit(sd, false);
402 break;
403 }
404 }
405
406 /* ------------------------------ CTRL OPS ------------------------------ */
407
adv7511_s_ctrl(struct v4l2_ctrl * ctrl)408 static int adv7511_s_ctrl(struct v4l2_ctrl *ctrl)
409 {
410 struct v4l2_subdev *sd = to_sd(ctrl);
411 struct adv7511_state *state = get_adv7511_state(sd);
412
413 v4l2_dbg(1, debug, sd, "%s: ctrl id: %d, ctrl->val %d\n", __func__, ctrl->id, ctrl->val);
414
415 if (state->hdmi_mode_ctrl == ctrl) {
416 /* Set HDMI or DVI-D */
417 adv7511_wr_and_or(sd, 0xaf, 0xfd, ctrl->val == V4L2_DV_TX_MODE_HDMI ? 0x02 : 0x00);
418 return 0;
419 }
420 if (state->rgb_quantization_range_ctrl == ctrl) {
421 adv7511_set_rgb_quantization_mode(sd, ctrl);
422 return 0;
423 }
424 if (state->content_type_ctrl == ctrl) {
425 u8 itc, cn;
426
427 state->content_type = ctrl->val;
428 itc = state->content_type != V4L2_DV_IT_CONTENT_TYPE_NO_ITC;
429 cn = itc ? state->content_type : V4L2_DV_IT_CONTENT_TYPE_GRAPHICS;
430 adv7511_wr_and_or(sd, 0x57, 0x7f, itc << 7);
431 adv7511_wr_and_or(sd, 0x59, 0xcf, cn << 4);
432 return 0;
433 }
434
435 return -EINVAL;
436 }
437
438 static const struct v4l2_ctrl_ops adv7511_ctrl_ops = {
439 .s_ctrl = adv7511_s_ctrl,
440 };
441
442 /* ---------------------------- CORE OPS ------------------------------------------- */
443
444 #ifdef CONFIG_VIDEO_ADV_DEBUG
adv7511_inv_register(struct v4l2_subdev * sd)445 static void adv7511_inv_register(struct v4l2_subdev *sd)
446 {
447 struct adv7511_state *state = get_adv7511_state(sd);
448
449 v4l2_info(sd, "0x000-0x0ff: Main Map\n");
450 if (state->i2c_cec)
451 v4l2_info(sd, "0x100-0x1ff: CEC Map\n");
452 }
453
adv7511_g_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)454 static int adv7511_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
455 {
456 struct adv7511_state *state = get_adv7511_state(sd);
457
458 reg->size = 1;
459 switch (reg->reg >> 8) {
460 case 0:
461 reg->val = adv7511_rd(sd, reg->reg & 0xff);
462 break;
463 case 1:
464 if (state->i2c_cec) {
465 reg->val = adv7511_cec_read(sd, reg->reg & 0xff);
466 break;
467 }
468 /* fall through */
469 default:
470 v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
471 adv7511_inv_register(sd);
472 break;
473 }
474 return 0;
475 }
476
adv7511_s_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)477 static int adv7511_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
478 {
479 struct adv7511_state *state = get_adv7511_state(sd);
480
481 switch (reg->reg >> 8) {
482 case 0:
483 adv7511_wr(sd, reg->reg & 0xff, reg->val & 0xff);
484 break;
485 case 1:
486 if (state->i2c_cec) {
487 adv7511_cec_write(sd, reg->reg & 0xff, reg->val & 0xff);
488 break;
489 }
490 /* fall through */
491 default:
492 v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
493 adv7511_inv_register(sd);
494 break;
495 }
496 return 0;
497 }
498 #endif
499
500 struct adv7511_cfg_read_infoframe {
501 const char *desc;
502 u8 present_reg;
503 u8 present_mask;
504 u8 header[3];
505 u16 payload_addr;
506 };
507
hdmi_infoframe_checksum(u8 * ptr,size_t size)508 static u8 hdmi_infoframe_checksum(u8 *ptr, size_t size)
509 {
510 u8 csum = 0;
511 size_t i;
512
513 /* compute checksum */
514 for (i = 0; i < size; i++)
515 csum += ptr[i];
516
517 return 256 - csum;
518 }
519
log_infoframe(struct v4l2_subdev * sd,const struct adv7511_cfg_read_infoframe * cri)520 static void log_infoframe(struct v4l2_subdev *sd, const struct adv7511_cfg_read_infoframe *cri)
521 {
522 struct i2c_client *client = v4l2_get_subdevdata(sd);
523 struct device *dev = &client->dev;
524 union hdmi_infoframe frame;
525 u8 buffer[32];
526 u8 len;
527 int i;
528
529 if (!(adv7511_rd(sd, cri->present_reg) & cri->present_mask)) {
530 v4l2_info(sd, "%s infoframe not transmitted\n", cri->desc);
531 return;
532 }
533
534 memcpy(buffer, cri->header, sizeof(cri->header));
535
536 len = buffer[2];
537
538 if (len + 4 > sizeof(buffer)) {
539 v4l2_err(sd, "%s: invalid %s infoframe length %d\n", __func__, cri->desc, len);
540 return;
541 }
542
543 if (cri->payload_addr >= 0x100) {
544 for (i = 0; i < len; i++)
545 buffer[i + 4] = adv7511_pktmem_rd(sd, cri->payload_addr + i - 0x100);
546 } else {
547 for (i = 0; i < len; i++)
548 buffer[i + 4] = adv7511_rd(sd, cri->payload_addr + i);
549 }
550 buffer[3] = 0;
551 buffer[3] = hdmi_infoframe_checksum(buffer, len + 4);
552
553 if (hdmi_infoframe_unpack(&frame, buffer) < 0) {
554 v4l2_err(sd, "%s: unpack of %s infoframe failed\n", __func__, cri->desc);
555 return;
556 }
557
558 hdmi_infoframe_log(KERN_INFO, dev, &frame);
559 }
560
adv7511_log_infoframes(struct v4l2_subdev * sd)561 static void adv7511_log_infoframes(struct v4l2_subdev *sd)
562 {
563 static const struct adv7511_cfg_read_infoframe cri[] = {
564 { "AVI", 0x44, 0x10, { 0x82, 2, 13 }, 0x55 },
565 { "Audio", 0x44, 0x08, { 0x84, 1, 10 }, 0x73 },
566 { "SDP", 0x40, 0x40, { 0x83, 1, 25 }, 0x103 },
567 };
568 int i;
569
570 for (i = 0; i < ARRAY_SIZE(cri); i++)
571 log_infoframe(sd, &cri[i]);
572 }
573
adv7511_log_status(struct v4l2_subdev * sd)574 static int adv7511_log_status(struct v4l2_subdev *sd)
575 {
576 struct adv7511_state *state = get_adv7511_state(sd);
577 struct adv7511_state_edid *edid = &state->edid;
578 int i;
579
580 static const char * const states[] = {
581 "in reset",
582 "reading EDID",
583 "idle",
584 "initializing HDCP",
585 "HDCP enabled",
586 "initializing HDCP repeater",
587 "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"
588 };
589 static const char * const errors[] = {
590 "no error",
591 "bad receiver BKSV",
592 "Ri mismatch",
593 "Pj mismatch",
594 "i2c error",
595 "timed out",
596 "max repeater cascade exceeded",
597 "hash check failed",
598 "too many devices",
599 "9", "A", "B", "C", "D", "E", "F"
600 };
601
602 v4l2_info(sd, "power %s\n", state->power_on ? "on" : "off");
603 v4l2_info(sd, "%s hotplug, %s Rx Sense, %s EDID (%d block(s))\n",
604 (adv7511_rd(sd, 0x42) & MASK_ADV7511_HPD_DETECT) ? "detected" : "no",
605 (adv7511_rd(sd, 0x42) & MASK_ADV7511_MSEN_DETECT) ? "detected" : "no",
606 edid->segments ? "found" : "no",
607 edid->blocks);
608 v4l2_info(sd, "%s output %s\n",
609 (adv7511_rd(sd, 0xaf) & 0x02) ?
610 "HDMI" : "DVI-D",
611 (adv7511_rd(sd, 0xa1) & 0x3c) ?
612 "disabled" : "enabled");
613 v4l2_info(sd, "state: %s, error: %s, detect count: %u, msk/irq: %02x/%02x\n",
614 states[adv7511_rd(sd, 0xc8) & 0xf],
615 errors[adv7511_rd(sd, 0xc8) >> 4], state->edid_detect_counter,
616 adv7511_rd(sd, 0x94), adv7511_rd(sd, 0x96));
617 v4l2_info(sd, "RGB quantization: %s range\n", adv7511_rd(sd, 0x18) & 0x80 ? "limited" : "full");
618 if (adv7511_rd(sd, 0xaf) & 0x02) {
619 /* HDMI only */
620 u8 manual_cts = adv7511_rd(sd, 0x0a) & 0x80;
621 u32 N = (adv7511_rd(sd, 0x01) & 0xf) << 16 |
622 adv7511_rd(sd, 0x02) << 8 |
623 adv7511_rd(sd, 0x03);
624 u8 vic_detect = adv7511_rd(sd, 0x3e) >> 2;
625 u8 vic_sent = adv7511_rd(sd, 0x3d) & 0x3f;
626 u32 CTS;
627
628 if (manual_cts)
629 CTS = (adv7511_rd(sd, 0x07) & 0xf) << 16 |
630 adv7511_rd(sd, 0x08) << 8 |
631 adv7511_rd(sd, 0x09);
632 else
633 CTS = (adv7511_rd(sd, 0x04) & 0xf) << 16 |
634 adv7511_rd(sd, 0x05) << 8 |
635 adv7511_rd(sd, 0x06);
636 v4l2_info(sd, "CTS %s mode: N %d, CTS %d\n",
637 manual_cts ? "manual" : "automatic", N, CTS);
638 v4l2_info(sd, "VIC: detected %d, sent %d\n",
639 vic_detect, vic_sent);
640 adv7511_log_infoframes(sd);
641 }
642 if (state->dv_timings.type == V4L2_DV_BT_656_1120)
643 v4l2_print_dv_timings(sd->name, "timings: ",
644 &state->dv_timings, false);
645 else
646 v4l2_info(sd, "no timings set\n");
647 v4l2_info(sd, "i2c edid addr: 0x%x\n", state->i2c_edid_addr);
648
649 if (state->i2c_cec == NULL)
650 return 0;
651
652 v4l2_info(sd, "i2c cec addr: 0x%x\n", state->i2c_cec_addr);
653
654 v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ?
655 "enabled" : "disabled");
656 if (state->cec_enabled_adap) {
657 for (i = 0; i < ADV7511_MAX_ADDRS; i++) {
658 bool is_valid = state->cec_valid_addrs & (1 << i);
659
660 if (is_valid)
661 v4l2_info(sd, "CEC Logical Address: 0x%x\n",
662 state->cec_addr[i]);
663 }
664 }
665 v4l2_info(sd, "i2c pktmem addr: 0x%x\n", state->i2c_pktmem_addr);
666 return 0;
667 }
668
669 /* Power up/down adv7511 */
adv7511_s_power(struct v4l2_subdev * sd,int on)670 static int adv7511_s_power(struct v4l2_subdev *sd, int on)
671 {
672 struct adv7511_state *state = get_adv7511_state(sd);
673 const int retries = 20;
674 int i;
675
676 v4l2_dbg(1, debug, sd, "%s: power %s\n", __func__, on ? "on" : "off");
677
678 state->power_on = on;
679
680 if (!on) {
681 /* Power down */
682 adv7511_wr_and_or(sd, 0x41, 0xbf, 0x40);
683 return true;
684 }
685
686 /* Power up */
687 /* The adv7511 does not always come up immediately.
688 Retry multiple times. */
689 for (i = 0; i < retries; i++) {
690 adv7511_wr_and_or(sd, 0x41, 0xbf, 0x0);
691 if ((adv7511_rd(sd, 0x41) & 0x40) == 0)
692 break;
693 adv7511_wr_and_or(sd, 0x41, 0xbf, 0x40);
694 msleep(10);
695 }
696 if (i == retries) {
697 v4l2_dbg(1, debug, sd, "%s: failed to powerup the adv7511!\n", __func__);
698 adv7511_s_power(sd, 0);
699 return false;
700 }
701 if (i > 1)
702 v4l2_dbg(1, debug, sd, "%s: needed %d retries to powerup the adv7511\n", __func__, i);
703
704 /* Reserved registers that must be set */
705 adv7511_wr(sd, 0x98, 0x03);
706 adv7511_wr_and_or(sd, 0x9a, 0xfe, 0x70);
707 adv7511_wr(sd, 0x9c, 0x30);
708 adv7511_wr_and_or(sd, 0x9d, 0xfc, 0x01);
709 adv7511_wr(sd, 0xa2, 0xa4);
710 adv7511_wr(sd, 0xa3, 0xa4);
711 adv7511_wr(sd, 0xe0, 0xd0);
712 adv7511_wr(sd, 0xf9, 0x00);
713
714 adv7511_wr(sd, 0x43, state->i2c_edid_addr);
715 adv7511_wr(sd, 0x45, state->i2c_pktmem_addr);
716
717 /* Set number of attempts to read the EDID */
718 adv7511_wr(sd, 0xc9, 0xf);
719 return true;
720 }
721
722 #if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC)
adv7511_cec_adap_enable(struct cec_adapter * adap,bool enable)723 static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable)
724 {
725 struct adv7511_state *state = cec_get_drvdata(adap);
726 struct v4l2_subdev *sd = &state->sd;
727
728 if (state->i2c_cec == NULL)
729 return -EIO;
730
731 if (!state->cec_enabled_adap && enable) {
732 /* power up cec section */
733 adv7511_cec_write_and_or(sd, 0x4e, 0xfc, 0x01);
734 /* legacy mode and clear all rx buffers */
735 adv7511_cec_write(sd, 0x4a, 0x00);
736 adv7511_cec_write(sd, 0x4a, 0x07);
737 adv7511_cec_write_and_or(sd, 0x11, 0xfe, 0); /* initially disable tx */
738 /* enabled irqs: */
739 /* tx: ready */
740 /* tx: arbitration lost */
741 /* tx: retry timeout */
742 /* rx: ready 1 */
743 if (state->enabled_irq)
744 adv7511_wr_and_or(sd, 0x95, 0xc0, 0x39);
745 } else if (state->cec_enabled_adap && !enable) {
746 if (state->enabled_irq)
747 adv7511_wr_and_or(sd, 0x95, 0xc0, 0x00);
748 /* disable address mask 1-3 */
749 adv7511_cec_write_and_or(sd, 0x4b, 0x8f, 0x00);
750 /* power down cec section */
751 adv7511_cec_write_and_or(sd, 0x4e, 0xfc, 0x00);
752 state->cec_valid_addrs = 0;
753 }
754 state->cec_enabled_adap = enable;
755 return 0;
756 }
757
adv7511_cec_adap_log_addr(struct cec_adapter * adap,u8 addr)758 static int adv7511_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
759 {
760 struct adv7511_state *state = cec_get_drvdata(adap);
761 struct v4l2_subdev *sd = &state->sd;
762 unsigned int i, free_idx = ADV7511_MAX_ADDRS;
763
764 if (!state->cec_enabled_adap)
765 return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;
766
767 if (addr == CEC_LOG_ADDR_INVALID) {
768 adv7511_cec_write_and_or(sd, 0x4b, 0x8f, 0);
769 state->cec_valid_addrs = 0;
770 return 0;
771 }
772
773 for (i = 0; i < ADV7511_MAX_ADDRS; i++) {
774 bool is_valid = state->cec_valid_addrs & (1 << i);
775
776 if (free_idx == ADV7511_MAX_ADDRS && !is_valid)
777 free_idx = i;
778 if (is_valid && state->cec_addr[i] == addr)
779 return 0;
780 }
781 if (i == ADV7511_MAX_ADDRS) {
782 i = free_idx;
783 if (i == ADV7511_MAX_ADDRS)
784 return -ENXIO;
785 }
786 state->cec_addr[i] = addr;
787 state->cec_valid_addrs |= 1 << i;
788
789 switch (i) {
790 case 0:
791 /* enable address mask 0 */
792 adv7511_cec_write_and_or(sd, 0x4b, 0xef, 0x10);
793 /* set address for mask 0 */
794 adv7511_cec_write_and_or(sd, 0x4c, 0xf0, addr);
795 break;
796 case 1:
797 /* enable address mask 1 */
798 adv7511_cec_write_and_or(sd, 0x4b, 0xdf, 0x20);
799 /* set address for mask 1 */
800 adv7511_cec_write_and_or(sd, 0x4c, 0x0f, addr << 4);
801 break;
802 case 2:
803 /* enable address mask 2 */
804 adv7511_cec_write_and_or(sd, 0x4b, 0xbf, 0x40);
805 /* set address for mask 1 */
806 adv7511_cec_write_and_or(sd, 0x4d, 0xf0, addr);
807 break;
808 }
809 return 0;
810 }
811
adv7511_cec_adap_transmit(struct cec_adapter * adap,u8 attempts,u32 signal_free_time,struct cec_msg * msg)812 static int adv7511_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
813 u32 signal_free_time, struct cec_msg *msg)
814 {
815 struct adv7511_state *state = cec_get_drvdata(adap);
816 struct v4l2_subdev *sd = &state->sd;
817 u8 len = msg->len;
818 unsigned int i;
819
820 v4l2_dbg(1, debug, sd, "%s: len %d\n", __func__, len);
821
822 if (len > 16) {
823 v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len);
824 return -EINVAL;
825 }
826
827 /*
828 * The number of retries is the number of attempts - 1, but retry
829 * at least once. It's not clear if a value of 0 is allowed, so
830 * let's do at least one retry.
831 */
832 adv7511_cec_write_and_or(sd, 0x12, ~0x70, max(1, attempts - 1) << 4);
833
834 /* clear cec tx irq status */
835 adv7511_wr(sd, 0x97, 0x38);
836
837 /* write data */
838 for (i = 0; i < len; i++)
839 adv7511_cec_write(sd, i, msg->msg[i]);
840
841 /* set length (data + header) */
842 adv7511_cec_write(sd, 0x10, len);
843 /* start transmit, enable tx */
844 adv7511_cec_write(sd, 0x11, 0x01);
845 return 0;
846 }
847
adv_cec_tx_raw_status(struct v4l2_subdev * sd,u8 tx_raw_status)848 static void adv_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status)
849 {
850 struct adv7511_state *state = get_adv7511_state(sd);
851
852 if ((adv7511_cec_read(sd, 0x11) & 0x01) == 0) {
853 v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__);
854 return;
855 }
856
857 if (tx_raw_status & 0x10) {
858 v4l2_dbg(1, debug, sd,
859 "%s: tx raw: arbitration lost\n", __func__);
860 cec_transmit_done(state->cec_adap, CEC_TX_STATUS_ARB_LOST,
861 1, 0, 0, 0);
862 return;
863 }
864 if (tx_raw_status & 0x08) {
865 u8 status;
866 u8 nack_cnt;
867 u8 low_drive_cnt;
868
869 v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__);
870 /*
871 * We set this status bit since this hardware performs
872 * retransmissions.
873 */
874 status = CEC_TX_STATUS_MAX_RETRIES;
875 nack_cnt = adv7511_cec_read(sd, 0x14) & 0xf;
876 if (nack_cnt)
877 status |= CEC_TX_STATUS_NACK;
878 low_drive_cnt = adv7511_cec_read(sd, 0x14) >> 4;
879 if (low_drive_cnt)
880 status |= CEC_TX_STATUS_LOW_DRIVE;
881 cec_transmit_done(state->cec_adap, status,
882 0, nack_cnt, low_drive_cnt, 0);
883 return;
884 }
885 if (tx_raw_status & 0x20) {
886 v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__);
887 cec_transmit_done(state->cec_adap, CEC_TX_STATUS_OK, 0, 0, 0, 0);
888 return;
889 }
890 }
891
892 static const struct cec_adap_ops adv7511_cec_adap_ops = {
893 .adap_enable = adv7511_cec_adap_enable,
894 .adap_log_addr = adv7511_cec_adap_log_addr,
895 .adap_transmit = adv7511_cec_adap_transmit,
896 };
897 #endif
898
899 /* Enable interrupts */
adv7511_set_isr(struct v4l2_subdev * sd,bool enable)900 static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable)
901 {
902 struct adv7511_state *state = get_adv7511_state(sd);
903 u8 irqs = MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT;
904 u8 irqs_rd;
905 int retries = 100;
906
907 v4l2_dbg(2, debug, sd, "%s: %s\n", __func__, enable ? "enable" : "disable");
908
909 if (state->enabled_irq == enable)
910 return;
911 state->enabled_irq = enable;
912
913 /* The datasheet says that the EDID ready interrupt should be
914 disabled if there is no hotplug. */
915 if (!enable)
916 irqs = 0;
917 else if (adv7511_have_hotplug(sd))
918 irqs |= MASK_ADV7511_EDID_RDY_INT;
919
920 /*
921 * This i2c write can fail (approx. 1 in 1000 writes). But it
922 * is essential that this register is correct, so retry it
923 * multiple times.
924 *
925 * Note that the i2c write does not report an error, but the readback
926 * clearly shows the wrong value.
927 */
928 do {
929 adv7511_wr(sd, 0x94, irqs);
930 irqs_rd = adv7511_rd(sd, 0x94);
931 } while (retries-- && irqs_rd != irqs);
932
933 if (irqs_rd != irqs)
934 v4l2_err(sd, "Could not set interrupts: hw failure?\n");
935
936 adv7511_wr_and_or(sd, 0x95, 0xc0,
937 (state->cec_enabled_adap && enable) ? 0x39 : 0x00);
938 }
939
940 /* Interrupt handler */
adv7511_isr(struct v4l2_subdev * sd,u32 status,bool * handled)941 static int adv7511_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
942 {
943 u8 irq_status;
944 u8 cec_irq;
945
946 /* disable interrupts to prevent a race condition */
947 adv7511_set_isr(sd, false);
948 irq_status = adv7511_rd(sd, 0x96);
949 cec_irq = adv7511_rd(sd, 0x97);
950 /* clear detected interrupts */
951 adv7511_wr(sd, 0x96, irq_status);
952 adv7511_wr(sd, 0x97, cec_irq);
953
954 v4l2_dbg(1, debug, sd, "%s: irq 0x%x, cec-irq 0x%x\n", __func__,
955 irq_status, cec_irq);
956
957 if (irq_status & (MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT))
958 adv7511_check_monitor_present_status(sd);
959 if (irq_status & MASK_ADV7511_EDID_RDY_INT)
960 adv7511_check_edid_status(sd);
961
962 #if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC)
963 if (cec_irq & 0x38)
964 adv_cec_tx_raw_status(sd, cec_irq);
965
966 if (cec_irq & 1) {
967 struct adv7511_state *state = get_adv7511_state(sd);
968 struct cec_msg msg;
969
970 msg.len = adv7511_cec_read(sd, 0x25) & 0x1f;
971
972 v4l2_dbg(1, debug, sd, "%s: cec msg len %d\n", __func__,
973 msg.len);
974
975 if (msg.len > 16)
976 msg.len = 16;
977
978 if (msg.len) {
979 u8 i;
980
981 for (i = 0; i < msg.len; i++)
982 msg.msg[i] = adv7511_cec_read(sd, i + 0x15);
983
984 adv7511_cec_write(sd, 0x4a, 0); /* toggle to re-enable rx 1 */
985 adv7511_cec_write(sd, 0x4a, 1);
986 cec_received_msg(state->cec_adap, &msg);
987 }
988 }
989 #endif
990
991 /* enable interrupts */
992 adv7511_set_isr(sd, true);
993
994 if (handled)
995 *handled = true;
996 return 0;
997 }
998
999 static const struct v4l2_subdev_core_ops adv7511_core_ops = {
1000 .log_status = adv7511_log_status,
1001 #ifdef CONFIG_VIDEO_ADV_DEBUG
1002 .g_register = adv7511_g_register,
1003 .s_register = adv7511_s_register,
1004 #endif
1005 .s_power = adv7511_s_power,
1006 .interrupt_service_routine = adv7511_isr,
1007 };
1008
1009 /* ------------------------------ VIDEO OPS ------------------------------ */
1010
1011 /* Enable/disable adv7511 output */
adv7511_s_stream(struct v4l2_subdev * sd,int enable)1012 static int adv7511_s_stream(struct v4l2_subdev *sd, int enable)
1013 {
1014 struct adv7511_state *state = get_adv7511_state(sd);
1015
1016 v4l2_dbg(1, debug, sd, "%s: %sable\n", __func__, (enable ? "en" : "dis"));
1017 adv7511_wr_and_or(sd, 0xa1, ~0x3c, (enable ? 0 : 0x3c));
1018 if (enable) {
1019 adv7511_check_monitor_present_status(sd);
1020 } else {
1021 adv7511_s_power(sd, 0);
1022 state->have_monitor = false;
1023 }
1024 return 0;
1025 }
1026
adv7511_s_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)1027 static int adv7511_s_dv_timings(struct v4l2_subdev *sd,
1028 struct v4l2_dv_timings *timings)
1029 {
1030 struct adv7511_state *state = get_adv7511_state(sd);
1031 struct v4l2_bt_timings *bt = &timings->bt;
1032 u32 fps;
1033
1034 v4l2_dbg(1, debug, sd, "%s:\n", __func__);
1035
1036 /* quick sanity check */
1037 if (!v4l2_valid_dv_timings(timings, &adv7511_timings_cap, NULL, NULL))
1038 return -EINVAL;
1039
1040 /* Fill the optional fields .standards and .flags in struct v4l2_dv_timings
1041 if the format is one of the CEA or DMT timings. */
1042 v4l2_find_dv_timings_cap(timings, &adv7511_timings_cap, 0, NULL, NULL);
1043
1044 /* save timings */
1045 state->dv_timings = *timings;
1046
1047 /* set h/vsync polarities */
1048 adv7511_wr_and_or(sd, 0x17, 0x9f,
1049 ((bt->polarities & V4L2_DV_VSYNC_POS_POL) ? 0 : 0x40) |
1050 ((bt->polarities & V4L2_DV_HSYNC_POS_POL) ? 0 : 0x20));
1051
1052 fps = (u32)bt->pixelclock / (V4L2_DV_BT_FRAME_WIDTH(bt) * V4L2_DV_BT_FRAME_HEIGHT(bt));
1053 switch (fps) {
1054 case 24:
1055 adv7511_wr_and_or(sd, 0xfb, 0xf9, 1 << 1);
1056 break;
1057 case 25:
1058 adv7511_wr_and_or(sd, 0xfb, 0xf9, 2 << 1);
1059 break;
1060 case 30:
1061 adv7511_wr_and_or(sd, 0xfb, 0xf9, 3 << 1);
1062 break;
1063 default:
1064 adv7511_wr_and_or(sd, 0xfb, 0xf9, 0);
1065 break;
1066 }
1067
1068 /* update quantization range based on new dv_timings */
1069 adv7511_set_rgb_quantization_mode(sd, state->rgb_quantization_range_ctrl);
1070
1071 return 0;
1072 }
1073
adv7511_g_dv_timings(struct v4l2_subdev * sd,struct v4l2_dv_timings * timings)1074 static int adv7511_g_dv_timings(struct v4l2_subdev *sd,
1075 struct v4l2_dv_timings *timings)
1076 {
1077 struct adv7511_state *state = get_adv7511_state(sd);
1078
1079 v4l2_dbg(1, debug, sd, "%s:\n", __func__);
1080
1081 if (!timings)
1082 return -EINVAL;
1083
1084 *timings = state->dv_timings;
1085
1086 return 0;
1087 }
1088
adv7511_enum_dv_timings(struct v4l2_subdev * sd,struct v4l2_enum_dv_timings * timings)1089 static int adv7511_enum_dv_timings(struct v4l2_subdev *sd,
1090 struct v4l2_enum_dv_timings *timings)
1091 {
1092 if (timings->pad != 0)
1093 return -EINVAL;
1094
1095 return v4l2_enum_dv_timings_cap(timings, &adv7511_timings_cap, NULL, NULL);
1096 }
1097
adv7511_dv_timings_cap(struct v4l2_subdev * sd,struct v4l2_dv_timings_cap * cap)1098 static int adv7511_dv_timings_cap(struct v4l2_subdev *sd,
1099 struct v4l2_dv_timings_cap *cap)
1100 {
1101 if (cap->pad != 0)
1102 return -EINVAL;
1103
1104 *cap = adv7511_timings_cap;
1105 return 0;
1106 }
1107
1108 static const struct v4l2_subdev_video_ops adv7511_video_ops = {
1109 .s_stream = adv7511_s_stream,
1110 .s_dv_timings = adv7511_s_dv_timings,
1111 .g_dv_timings = adv7511_g_dv_timings,
1112 };
1113
1114 /* ------------------------------ AUDIO OPS ------------------------------ */
adv7511_s_audio_stream(struct v4l2_subdev * sd,int enable)1115 static int adv7511_s_audio_stream(struct v4l2_subdev *sd, int enable)
1116 {
1117 v4l2_dbg(1, debug, sd, "%s: %sable\n", __func__, (enable ? "en" : "dis"));
1118
1119 if (enable)
1120 adv7511_wr_and_or(sd, 0x4b, 0x3f, 0x80);
1121 else
1122 adv7511_wr_and_or(sd, 0x4b, 0x3f, 0x40);
1123
1124 return 0;
1125 }
1126
adv7511_s_clock_freq(struct v4l2_subdev * sd,u32 freq)1127 static int adv7511_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
1128 {
1129 u32 N;
1130
1131 switch (freq) {
1132 case 32000: N = 4096; break;
1133 case 44100: N = 6272; break;
1134 case 48000: N = 6144; break;
1135 case 88200: N = 12544; break;
1136 case 96000: N = 12288; break;
1137 case 176400: N = 25088; break;
1138 case 192000: N = 24576; break;
1139 default:
1140 return -EINVAL;
1141 }
1142
1143 /* Set N (used with CTS to regenerate the audio clock) */
1144 adv7511_wr(sd, 0x01, (N >> 16) & 0xf);
1145 adv7511_wr(sd, 0x02, (N >> 8) & 0xff);
1146 adv7511_wr(sd, 0x03, N & 0xff);
1147
1148 return 0;
1149 }
1150
adv7511_s_i2s_clock_freq(struct v4l2_subdev * sd,u32 freq)1151 static int adv7511_s_i2s_clock_freq(struct v4l2_subdev *sd, u32 freq)
1152 {
1153 u32 i2s_sf;
1154
1155 switch (freq) {
1156 case 32000: i2s_sf = 0x30; break;
1157 case 44100: i2s_sf = 0x00; break;
1158 case 48000: i2s_sf = 0x20; break;
1159 case 88200: i2s_sf = 0x80; break;
1160 case 96000: i2s_sf = 0xa0; break;
1161 case 176400: i2s_sf = 0xc0; break;
1162 case 192000: i2s_sf = 0xe0; break;
1163 default:
1164 return -EINVAL;
1165 }
1166
1167 /* Set sampling frequency for I2S audio to 48 kHz */
1168 adv7511_wr_and_or(sd, 0x15, 0xf, i2s_sf);
1169
1170 return 0;
1171 }
1172
adv7511_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)1173 static int adv7511_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config)
1174 {
1175 /* Only 2 channels in use for application */
1176 adv7511_wr_and_or(sd, 0x73, 0xf8, 0x1);
1177 /* Speaker mapping */
1178 adv7511_wr(sd, 0x76, 0x00);
1179
1180 /* 16 bit audio word length */
1181 adv7511_wr_and_or(sd, 0x14, 0xf0, 0x02);
1182
1183 return 0;
1184 }
1185
1186 static const struct v4l2_subdev_audio_ops adv7511_audio_ops = {
1187 .s_stream = adv7511_s_audio_stream,
1188 .s_clock_freq = adv7511_s_clock_freq,
1189 .s_i2s_clock_freq = adv7511_s_i2s_clock_freq,
1190 .s_routing = adv7511_s_routing,
1191 };
1192
1193 /* ---------------------------- PAD OPS ------------------------------------- */
1194
adv7511_get_edid(struct v4l2_subdev * sd,struct v4l2_edid * edid)1195 static int adv7511_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
1196 {
1197 struct adv7511_state *state = get_adv7511_state(sd);
1198
1199 memset(edid->reserved, 0, sizeof(edid->reserved));
1200
1201 if (edid->pad != 0)
1202 return -EINVAL;
1203
1204 if (edid->start_block == 0 && edid->blocks == 0) {
1205 edid->blocks = state->edid.segments * 2;
1206 return 0;
1207 }
1208
1209 if (state->edid.segments == 0)
1210 return -ENODATA;
1211
1212 if (edid->start_block >= state->edid.segments * 2)
1213 return -EINVAL;
1214
1215 if (edid->start_block + edid->blocks > state->edid.segments * 2)
1216 edid->blocks = state->edid.segments * 2 - edid->start_block;
1217
1218 memcpy(edid->edid, &state->edid.data[edid->start_block * 128],
1219 128 * edid->blocks);
1220
1221 return 0;
1222 }
1223
adv7511_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)1224 static int adv7511_enum_mbus_code(struct v4l2_subdev *sd,
1225 struct v4l2_subdev_pad_config *cfg,
1226 struct v4l2_subdev_mbus_code_enum *code)
1227 {
1228 if (code->pad != 0)
1229 return -EINVAL;
1230
1231 switch (code->index) {
1232 case 0:
1233 code->code = MEDIA_BUS_FMT_RGB888_1X24;
1234 break;
1235 case 1:
1236 code->code = MEDIA_BUS_FMT_YUYV8_1X16;
1237 break;
1238 case 2:
1239 code->code = MEDIA_BUS_FMT_UYVY8_1X16;
1240 break;
1241 default:
1242 return -EINVAL;
1243 }
1244 return 0;
1245 }
1246
adv7511_fill_format(struct adv7511_state * state,struct v4l2_mbus_framefmt * format)1247 static void adv7511_fill_format(struct adv7511_state *state,
1248 struct v4l2_mbus_framefmt *format)
1249 {
1250 format->width = state->dv_timings.bt.width;
1251 format->height = state->dv_timings.bt.height;
1252 format->field = V4L2_FIELD_NONE;
1253 }
1254
adv7511_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)1255 static int adv7511_get_fmt(struct v4l2_subdev *sd,
1256 struct v4l2_subdev_pad_config *cfg,
1257 struct v4l2_subdev_format *format)
1258 {
1259 struct adv7511_state *state = get_adv7511_state(sd);
1260
1261 if (format->pad != 0)
1262 return -EINVAL;
1263
1264 memset(&format->format, 0, sizeof(format->format));
1265 adv7511_fill_format(state, &format->format);
1266
1267 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1268 struct v4l2_mbus_framefmt *fmt;
1269
1270 fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
1271 format->format.code = fmt->code;
1272 format->format.colorspace = fmt->colorspace;
1273 format->format.ycbcr_enc = fmt->ycbcr_enc;
1274 format->format.quantization = fmt->quantization;
1275 format->format.xfer_func = fmt->xfer_func;
1276 } else {
1277 format->format.code = state->fmt_code;
1278 format->format.colorspace = state->colorspace;
1279 format->format.ycbcr_enc = state->ycbcr_enc;
1280 format->format.quantization = state->quantization;
1281 format->format.xfer_func = state->xfer_func;
1282 }
1283
1284 return 0;
1285 }
1286
adv7511_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)1287 static int adv7511_set_fmt(struct v4l2_subdev *sd,
1288 struct v4l2_subdev_pad_config *cfg,
1289 struct v4l2_subdev_format *format)
1290 {
1291 struct adv7511_state *state = get_adv7511_state(sd);
1292 /*
1293 * Bitfield namings come the CEA-861-F standard, table 8 "Auxiliary
1294 * Video Information (AVI) InfoFrame Format"
1295 *
1296 * c = Colorimetry
1297 * ec = Extended Colorimetry
1298 * y = RGB or YCbCr
1299 * q = RGB Quantization Range
1300 * yq = YCC Quantization Range
1301 */
1302 u8 c = HDMI_COLORIMETRY_NONE;
1303 u8 ec = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
1304 u8 y = HDMI_COLORSPACE_RGB;
1305 u8 q = HDMI_QUANTIZATION_RANGE_DEFAULT;
1306 u8 yq = HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
1307 u8 itc = state->content_type != V4L2_DV_IT_CONTENT_TYPE_NO_ITC;
1308 u8 cn = itc ? state->content_type : V4L2_DV_IT_CONTENT_TYPE_GRAPHICS;
1309
1310 if (format->pad != 0)
1311 return -EINVAL;
1312 switch (format->format.code) {
1313 case MEDIA_BUS_FMT_UYVY8_1X16:
1314 case MEDIA_BUS_FMT_YUYV8_1X16:
1315 case MEDIA_BUS_FMT_RGB888_1X24:
1316 break;
1317 default:
1318 return -EINVAL;
1319 }
1320
1321 adv7511_fill_format(state, &format->format);
1322 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1323 struct v4l2_mbus_framefmt *fmt;
1324
1325 fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
1326 fmt->code = format->format.code;
1327 fmt->colorspace = format->format.colorspace;
1328 fmt->ycbcr_enc = format->format.ycbcr_enc;
1329 fmt->quantization = format->format.quantization;
1330 fmt->xfer_func = format->format.xfer_func;
1331 return 0;
1332 }
1333
1334 switch (format->format.code) {
1335 case MEDIA_BUS_FMT_UYVY8_1X16:
1336 adv7511_wr_and_or(sd, 0x15, 0xf0, 0x01);
1337 adv7511_wr_and_or(sd, 0x16, 0x03, 0xb8);
1338 y = HDMI_COLORSPACE_YUV422;
1339 break;
1340 case MEDIA_BUS_FMT_YUYV8_1X16:
1341 adv7511_wr_and_or(sd, 0x15, 0xf0, 0x01);
1342 adv7511_wr_and_or(sd, 0x16, 0x03, 0xbc);
1343 y = HDMI_COLORSPACE_YUV422;
1344 break;
1345 case MEDIA_BUS_FMT_RGB888_1X24:
1346 default:
1347 adv7511_wr_and_or(sd, 0x15, 0xf0, 0x00);
1348 adv7511_wr_and_or(sd, 0x16, 0x03, 0x00);
1349 break;
1350 }
1351 state->fmt_code = format->format.code;
1352 state->colorspace = format->format.colorspace;
1353 state->ycbcr_enc = format->format.ycbcr_enc;
1354 state->quantization = format->format.quantization;
1355 state->xfer_func = format->format.xfer_func;
1356
1357 switch (format->format.colorspace) {
1358 case V4L2_COLORSPACE_ADOBERGB:
1359 c = HDMI_COLORIMETRY_EXTENDED;
1360 ec = y ? HDMI_EXTENDED_COLORIMETRY_ADOBE_YCC_601 :
1361 HDMI_EXTENDED_COLORIMETRY_ADOBE_RGB;
1362 break;
1363 case V4L2_COLORSPACE_SMPTE170M:
1364 c = y ? HDMI_COLORIMETRY_ITU_601 : HDMI_COLORIMETRY_NONE;
1365 if (y && format->format.ycbcr_enc == V4L2_YCBCR_ENC_XV601) {
1366 c = HDMI_COLORIMETRY_EXTENDED;
1367 ec = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
1368 }
1369 break;
1370 case V4L2_COLORSPACE_REC709:
1371 c = y ? HDMI_COLORIMETRY_ITU_709 : HDMI_COLORIMETRY_NONE;
1372 if (y && format->format.ycbcr_enc == V4L2_YCBCR_ENC_XV709) {
1373 c = HDMI_COLORIMETRY_EXTENDED;
1374 ec = HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
1375 }
1376 break;
1377 case V4L2_COLORSPACE_SRGB:
1378 c = y ? HDMI_COLORIMETRY_EXTENDED : HDMI_COLORIMETRY_NONE;
1379 ec = y ? HDMI_EXTENDED_COLORIMETRY_S_YCC_601 :
1380 HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
1381 break;
1382 case V4L2_COLORSPACE_BT2020:
1383 c = HDMI_COLORIMETRY_EXTENDED;
1384 if (y && format->format.ycbcr_enc == V4L2_YCBCR_ENC_BT2020_CONST_LUM)
1385 ec = 5; /* Not yet available in hdmi.h */
1386 else
1387 ec = 6; /* Not yet available in hdmi.h */
1388 break;
1389 default:
1390 break;
1391 }
1392
1393 /*
1394 * CEA-861-F says that for RGB formats the YCC range must match the
1395 * RGB range, although sources should ignore the YCC range.
1396 *
1397 * The RGB quantization range shouldn't be non-zero if the EDID doesn't
1398 * have the Q bit set in the Video Capabilities Data Block, however this
1399 * isn't checked at the moment. The assumption is that the application
1400 * knows the EDID and can detect this.
1401 *
1402 * The same is true for the YCC quantization range: non-standard YCC
1403 * quantization ranges should only be sent if the EDID has the YQ bit
1404 * set in the Video Capabilities Data Block.
1405 */
1406 switch (format->format.quantization) {
1407 case V4L2_QUANTIZATION_FULL_RANGE:
1408 q = y ? HDMI_QUANTIZATION_RANGE_DEFAULT :
1409 HDMI_QUANTIZATION_RANGE_FULL;
1410 yq = q ? q - 1 : HDMI_YCC_QUANTIZATION_RANGE_FULL;
1411 break;
1412 case V4L2_QUANTIZATION_LIM_RANGE:
1413 q = y ? HDMI_QUANTIZATION_RANGE_DEFAULT :
1414 HDMI_QUANTIZATION_RANGE_LIMITED;
1415 yq = q ? q - 1 : HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
1416 break;
1417 }
1418
1419 adv7511_wr_and_or(sd, 0x4a, 0xbf, 0);
1420 adv7511_wr_and_or(sd, 0x55, 0x9f, y << 5);
1421 adv7511_wr_and_or(sd, 0x56, 0x3f, c << 6);
1422 adv7511_wr_and_or(sd, 0x57, 0x83, (ec << 4) | (q << 2) | (itc << 7));
1423 adv7511_wr_and_or(sd, 0x59, 0x0f, (yq << 6) | (cn << 4));
1424 adv7511_wr_and_or(sd, 0x4a, 0xff, 1);
1425 adv7511_set_rgb_quantization_mode(sd, state->rgb_quantization_range_ctrl);
1426
1427 return 0;
1428 }
1429
1430 static const struct v4l2_subdev_pad_ops adv7511_pad_ops = {
1431 .get_edid = adv7511_get_edid,
1432 .enum_mbus_code = adv7511_enum_mbus_code,
1433 .get_fmt = adv7511_get_fmt,
1434 .set_fmt = adv7511_set_fmt,
1435 .enum_dv_timings = adv7511_enum_dv_timings,
1436 .dv_timings_cap = adv7511_dv_timings_cap,
1437 };
1438
1439 /* --------------------- SUBDEV OPS --------------------------------------- */
1440
1441 static const struct v4l2_subdev_ops adv7511_ops = {
1442 .core = &adv7511_core_ops,
1443 .pad = &adv7511_pad_ops,
1444 .video = &adv7511_video_ops,
1445 .audio = &adv7511_audio_ops,
1446 };
1447
1448 /* ----------------------------------------------------------------------- */
adv7511_dbg_dump_edid(int lvl,int debug,struct v4l2_subdev * sd,int segment,u8 * buf)1449 static void adv7511_dbg_dump_edid(int lvl, int debug, struct v4l2_subdev *sd, int segment, u8 *buf)
1450 {
1451 if (debug >= lvl) {
1452 int i, j;
1453 v4l2_dbg(lvl, debug, sd, "edid segment %d\n", segment);
1454 for (i = 0; i < 256; i += 16) {
1455 u8 b[128];
1456 u8 *bp = b;
1457 if (i == 128)
1458 v4l2_dbg(lvl, debug, sd, "\n");
1459 for (j = i; j < i + 16; j++) {
1460 sprintf(bp, "0x%02x, ", buf[j]);
1461 bp += 6;
1462 }
1463 bp[0] = '\0';
1464 v4l2_dbg(lvl, debug, sd, "%s\n", b);
1465 }
1466 }
1467 }
1468
adv7511_notify_no_edid(struct v4l2_subdev * sd)1469 static void adv7511_notify_no_edid(struct v4l2_subdev *sd)
1470 {
1471 struct adv7511_state *state = get_adv7511_state(sd);
1472 struct adv7511_edid_detect ed;
1473
1474 /* We failed to read the EDID, so send an event for this. */
1475 ed.present = false;
1476 ed.segment = adv7511_rd(sd, 0xc4);
1477 ed.phys_addr = CEC_PHYS_ADDR_INVALID;
1478 cec_s_phys_addr(state->cec_adap, ed.phys_addr, false);
1479 v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
1480 v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, 0x0);
1481 }
1482
adv7511_edid_handler(struct work_struct * work)1483 static void adv7511_edid_handler(struct work_struct *work)
1484 {
1485 struct delayed_work *dwork = to_delayed_work(work);
1486 struct adv7511_state *state = container_of(dwork, struct adv7511_state, edid_handler);
1487 struct v4l2_subdev *sd = &state->sd;
1488
1489 v4l2_dbg(1, debug, sd, "%s:\n", __func__);
1490
1491 if (adv7511_check_edid_status(sd)) {
1492 /* Return if we received the EDID. */
1493 return;
1494 }
1495
1496 if (adv7511_have_hotplug(sd)) {
1497 /* We must retry reading the EDID several times, it is possible
1498 * that initially the EDID couldn't be read due to i2c errors
1499 * (DVI connectors are particularly prone to this problem). */
1500 if (state->edid.read_retries) {
1501 state->edid.read_retries--;
1502 v4l2_dbg(1, debug, sd, "%s: edid read failed\n", __func__);
1503 state->have_monitor = false;
1504 adv7511_s_power(sd, false);
1505 adv7511_s_power(sd, true);
1506 queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
1507 return;
1508 }
1509 }
1510
1511 /* We failed to read the EDID, so send an event for this. */
1512 adv7511_notify_no_edid(sd);
1513 v4l2_dbg(1, debug, sd, "%s: no edid found\n", __func__);
1514 }
1515
adv7511_audio_setup(struct v4l2_subdev * sd)1516 static void adv7511_audio_setup(struct v4l2_subdev *sd)
1517 {
1518 v4l2_dbg(1, debug, sd, "%s\n", __func__);
1519
1520 adv7511_s_i2s_clock_freq(sd, 48000);
1521 adv7511_s_clock_freq(sd, 48000);
1522 adv7511_s_routing(sd, 0, 0, 0);
1523 }
1524
1525 /* Configure hdmi transmitter. */
adv7511_setup(struct v4l2_subdev * sd)1526 static void adv7511_setup(struct v4l2_subdev *sd)
1527 {
1528 struct adv7511_state *state = get_adv7511_state(sd);
1529 v4l2_dbg(1, debug, sd, "%s\n", __func__);
1530
1531 /* Input format: RGB 4:4:4 */
1532 adv7511_wr_and_or(sd, 0x15, 0xf0, 0x0);
1533 /* Output format: RGB 4:4:4 */
1534 adv7511_wr_and_or(sd, 0x16, 0x7f, 0x0);
1535 /* 1st order interpolation 4:2:2 -> 4:4:4 up conversion, Aspect ratio: 16:9 */
1536 adv7511_wr_and_or(sd, 0x17, 0xf9, 0x06);
1537 /* Disable pixel repetition */
1538 adv7511_wr_and_or(sd, 0x3b, 0x9f, 0x0);
1539 /* Disable CSC */
1540 adv7511_wr_and_or(sd, 0x18, 0x7f, 0x0);
1541 /* Output format: RGB 4:4:4, Active Format Information is valid,
1542 * underscanned */
1543 adv7511_wr_and_or(sd, 0x55, 0x9c, 0x12);
1544 /* AVI Info frame packet enable, Audio Info frame disable */
1545 adv7511_wr_and_or(sd, 0x44, 0xe7, 0x10);
1546 /* Colorimetry, Active format aspect ratio: same as picure. */
1547 adv7511_wr(sd, 0x56, 0xa8);
1548 /* No encryption */
1549 adv7511_wr_and_or(sd, 0xaf, 0xed, 0x0);
1550
1551 /* Positive clk edge capture for input video clock */
1552 adv7511_wr_and_or(sd, 0xba, 0x1f, 0x60);
1553
1554 adv7511_audio_setup(sd);
1555
1556 v4l2_ctrl_handler_setup(&state->hdl);
1557 }
1558
adv7511_notify_monitor_detect(struct v4l2_subdev * sd)1559 static void adv7511_notify_monitor_detect(struct v4l2_subdev *sd)
1560 {
1561 struct adv7511_monitor_detect mdt;
1562 struct adv7511_state *state = get_adv7511_state(sd);
1563
1564 mdt.present = state->have_monitor;
1565 v4l2_subdev_notify(sd, ADV7511_MONITOR_DETECT, (void *)&mdt);
1566 }
1567
adv7511_check_monitor_present_status(struct v4l2_subdev * sd)1568 static void adv7511_check_monitor_present_status(struct v4l2_subdev *sd)
1569 {
1570 struct adv7511_state *state = get_adv7511_state(sd);
1571 /* read hotplug and rx-sense state */
1572 u8 status = adv7511_rd(sd, 0x42);
1573
1574 v4l2_dbg(1, debug, sd, "%s: status: 0x%x%s%s\n",
1575 __func__,
1576 status,
1577 status & MASK_ADV7511_HPD_DETECT ? ", hotplug" : "",
1578 status & MASK_ADV7511_MSEN_DETECT ? ", rx-sense" : "");
1579
1580 /* update read only ctrls */
1581 v4l2_ctrl_s_ctrl(state->hotplug_ctrl, adv7511_have_hotplug(sd) ? 0x1 : 0x0);
1582 v4l2_ctrl_s_ctrl(state->rx_sense_ctrl, adv7511_have_rx_sense(sd) ? 0x1 : 0x0);
1583
1584 if ((status & MASK_ADV7511_HPD_DETECT) && ((status & MASK_ADV7511_MSEN_DETECT) || state->edid.segments)) {
1585 v4l2_dbg(1, debug, sd, "%s: hotplug and (rx-sense or edid)\n", __func__);
1586 if (!state->have_monitor) {
1587 v4l2_dbg(1, debug, sd, "%s: monitor detected\n", __func__);
1588 state->have_monitor = true;
1589 adv7511_set_isr(sd, true);
1590 if (!adv7511_s_power(sd, true)) {
1591 v4l2_dbg(1, debug, sd, "%s: monitor detected, powerup failed\n", __func__);
1592 return;
1593 }
1594 adv7511_setup(sd);
1595 adv7511_notify_monitor_detect(sd);
1596 state->edid.read_retries = EDID_MAX_RETRIES;
1597 queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
1598 }
1599 } else if (status & MASK_ADV7511_HPD_DETECT) {
1600 v4l2_dbg(1, debug, sd, "%s: hotplug detected\n", __func__);
1601 state->edid.read_retries = EDID_MAX_RETRIES;
1602 queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
1603 } else if (!(status & MASK_ADV7511_HPD_DETECT)) {
1604 v4l2_dbg(1, debug, sd, "%s: hotplug not detected\n", __func__);
1605 if (state->have_monitor) {
1606 v4l2_dbg(1, debug, sd, "%s: monitor not detected\n", __func__);
1607 state->have_monitor = false;
1608 adv7511_notify_monitor_detect(sd);
1609 }
1610 adv7511_s_power(sd, false);
1611 memset(&state->edid, 0, sizeof(struct adv7511_state_edid));
1612 adv7511_notify_no_edid(sd);
1613 }
1614 }
1615
edid_block_verify_crc(u8 * edid_block)1616 static bool edid_block_verify_crc(u8 *edid_block)
1617 {
1618 u8 sum = 0;
1619 int i;
1620
1621 for (i = 0; i < 128; i++)
1622 sum += edid_block[i];
1623 return sum == 0;
1624 }
1625
edid_verify_crc(struct v4l2_subdev * sd,u32 segment)1626 static bool edid_verify_crc(struct v4l2_subdev *sd, u32 segment)
1627 {
1628 struct adv7511_state *state = get_adv7511_state(sd);
1629 u32 blocks = state->edid.blocks;
1630 u8 *data = state->edid.data;
1631
1632 if (!edid_block_verify_crc(&data[segment * 256]))
1633 return false;
1634 if ((segment + 1) * 2 <= blocks)
1635 return edid_block_verify_crc(&data[segment * 256 + 128]);
1636 return true;
1637 }
1638
edid_verify_header(struct v4l2_subdev * sd,u32 segment)1639 static bool edid_verify_header(struct v4l2_subdev *sd, u32 segment)
1640 {
1641 static const u8 hdmi_header[] = {
1642 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
1643 };
1644 struct adv7511_state *state = get_adv7511_state(sd);
1645 u8 *data = state->edid.data;
1646
1647 if (segment != 0)
1648 return true;
1649 return !memcmp(data, hdmi_header, sizeof(hdmi_header));
1650 }
1651
adv7511_check_edid_status(struct v4l2_subdev * sd)1652 static bool adv7511_check_edid_status(struct v4l2_subdev *sd)
1653 {
1654 struct adv7511_state *state = get_adv7511_state(sd);
1655 u8 edidRdy = adv7511_rd(sd, 0xc5);
1656
1657 v4l2_dbg(1, debug, sd, "%s: edid ready (retries: %d)\n",
1658 __func__, EDID_MAX_RETRIES - state->edid.read_retries);
1659
1660 if (state->edid.complete)
1661 return true;
1662
1663 if (edidRdy & MASK_ADV7511_EDID_RDY) {
1664 int segment = adv7511_rd(sd, 0xc4);
1665 struct adv7511_edid_detect ed;
1666
1667 if (segment >= EDID_MAX_SEGM) {
1668 v4l2_err(sd, "edid segment number too big\n");
1669 return false;
1670 }
1671 v4l2_dbg(1, debug, sd, "%s: got segment %d\n", __func__, segment);
1672 adv7511_edid_rd(sd, 256, &state->edid.data[segment * 256]);
1673 adv7511_dbg_dump_edid(2, debug, sd, segment, &state->edid.data[segment * 256]);
1674 if (segment == 0) {
1675 state->edid.blocks = state->edid.data[0x7e] + 1;
1676 v4l2_dbg(1, debug, sd, "%s: %d blocks in total\n", __func__, state->edid.blocks);
1677 }
1678 if (!edid_verify_crc(sd, segment) ||
1679 !edid_verify_header(sd, segment)) {
1680 /* edid crc error, force reread of edid segment */
1681 v4l2_err(sd, "%s: edid crc or header error\n", __func__);
1682 state->have_monitor = false;
1683 adv7511_s_power(sd, false);
1684 adv7511_s_power(sd, true);
1685 return false;
1686 }
1687 /* one more segment read ok */
1688 state->edid.segments = segment + 1;
1689 v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, 0x1);
1690 if (((state->edid.data[0x7e] >> 1) + 1) > state->edid.segments) {
1691 /* Request next EDID segment */
1692 v4l2_dbg(1, debug, sd, "%s: request segment %d\n", __func__, state->edid.segments);
1693 adv7511_wr(sd, 0xc9, 0xf);
1694 adv7511_wr(sd, 0xc4, state->edid.segments);
1695 state->edid.read_retries = EDID_MAX_RETRIES;
1696 queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
1697 return false;
1698 }
1699
1700 v4l2_dbg(1, debug, sd, "%s: edid complete with %d segment(s)\n", __func__, state->edid.segments);
1701 state->edid.complete = true;
1702 ed.phys_addr = cec_get_edid_phys_addr(state->edid.data,
1703 state->edid.segments * 256,
1704 NULL);
1705 /* report when we have all segments
1706 but report only for segment 0
1707 */
1708 ed.present = true;
1709 ed.segment = 0;
1710 state->edid_detect_counter++;
1711 cec_s_phys_addr(state->cec_adap, ed.phys_addr, false);
1712 v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
1713 return ed.present;
1714 }
1715
1716 return false;
1717 }
1718
adv7511_registered(struct v4l2_subdev * sd)1719 static int adv7511_registered(struct v4l2_subdev *sd)
1720 {
1721 struct adv7511_state *state = get_adv7511_state(sd);
1722 struct i2c_client *client = v4l2_get_subdevdata(sd);
1723 int err;
1724
1725 err = cec_register_adapter(state->cec_adap, &client->dev);
1726 if (err)
1727 cec_delete_adapter(state->cec_adap);
1728 return err;
1729 }
1730
adv7511_unregistered(struct v4l2_subdev * sd)1731 static void adv7511_unregistered(struct v4l2_subdev *sd)
1732 {
1733 struct adv7511_state *state = get_adv7511_state(sd);
1734
1735 cec_unregister_adapter(state->cec_adap);
1736 }
1737
1738 static const struct v4l2_subdev_internal_ops adv7511_int_ops = {
1739 .registered = adv7511_registered,
1740 .unregistered = adv7511_unregistered,
1741 };
1742
1743 /* ----------------------------------------------------------------------- */
1744 /* Setup ADV7511 */
adv7511_init_setup(struct v4l2_subdev * sd)1745 static void adv7511_init_setup(struct v4l2_subdev *sd)
1746 {
1747 struct adv7511_state *state = get_adv7511_state(sd);
1748 struct adv7511_state_edid *edid = &state->edid;
1749 u32 cec_clk = state->pdata.cec_clk;
1750 u8 ratio;
1751
1752 v4l2_dbg(1, debug, sd, "%s\n", __func__);
1753
1754 /* clear all interrupts */
1755 adv7511_wr(sd, 0x96, 0xff);
1756 adv7511_wr(sd, 0x97, 0xff);
1757 /*
1758 * Stop HPD from resetting a lot of registers.
1759 * It might leave the chip in a partly un-initialized state,
1760 * in particular with regards to hotplug bounces.
1761 */
1762 adv7511_wr_and_or(sd, 0xd6, 0x3f, 0xc0);
1763 memset(edid, 0, sizeof(struct adv7511_state_edid));
1764 state->have_monitor = false;
1765 adv7511_set_isr(sd, false);
1766 adv7511_s_stream(sd, false);
1767 adv7511_s_audio_stream(sd, false);
1768
1769 if (state->i2c_cec == NULL)
1770 return;
1771
1772 v4l2_dbg(1, debug, sd, "%s: cec_clk %d\n", __func__, cec_clk);
1773
1774 /* cec soft reset */
1775 adv7511_cec_write(sd, 0x50, 0x01);
1776 adv7511_cec_write(sd, 0x50, 0x00);
1777
1778 /* legacy mode */
1779 adv7511_cec_write(sd, 0x4a, 0x00);
1780 adv7511_cec_write(sd, 0x4a, 0x07);
1781
1782 if (cec_clk % 750000 != 0)
1783 v4l2_err(sd, "%s: cec_clk %d, not multiple of 750 Khz\n",
1784 __func__, cec_clk);
1785
1786 ratio = (cec_clk / 750000) - 1;
1787 adv7511_cec_write(sd, 0x4e, ratio << 2);
1788 }
1789
adv7511_probe(struct i2c_client * client,const struct i2c_device_id * id)1790 static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *id)
1791 {
1792 struct adv7511_state *state;
1793 struct adv7511_platform_data *pdata = client->dev.platform_data;
1794 struct v4l2_ctrl_handler *hdl;
1795 struct v4l2_subdev *sd;
1796 u8 chip_id[2];
1797 int err = -EIO;
1798
1799 /* Check if the adapter supports the needed features */
1800 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1801 return -EIO;
1802
1803 state = devm_kzalloc(&client->dev, sizeof(struct adv7511_state), GFP_KERNEL);
1804 if (!state)
1805 return -ENOMEM;
1806
1807 /* Platform data */
1808 if (!pdata) {
1809 v4l_err(client, "No platform data!\n");
1810 return -ENODEV;
1811 }
1812 memcpy(&state->pdata, pdata, sizeof(state->pdata));
1813 state->fmt_code = MEDIA_BUS_FMT_RGB888_1X24;
1814 state->colorspace = V4L2_COLORSPACE_SRGB;
1815
1816 sd = &state->sd;
1817
1818 v4l2_dbg(1, debug, sd, "detecting adv7511 client on address 0x%x\n",
1819 client->addr << 1);
1820
1821 v4l2_i2c_subdev_init(sd, client, &adv7511_ops);
1822 sd->internal_ops = &adv7511_int_ops;
1823
1824 hdl = &state->hdl;
1825 v4l2_ctrl_handler_init(hdl, 10);
1826 /* add in ascending ID order */
1827 state->hdmi_mode_ctrl = v4l2_ctrl_new_std_menu(hdl, &adv7511_ctrl_ops,
1828 V4L2_CID_DV_TX_MODE, V4L2_DV_TX_MODE_HDMI,
1829 0, V4L2_DV_TX_MODE_DVI_D);
1830 state->hotplug_ctrl = v4l2_ctrl_new_std(hdl, NULL,
1831 V4L2_CID_DV_TX_HOTPLUG, 0, 1, 0, 0);
1832 state->rx_sense_ctrl = v4l2_ctrl_new_std(hdl, NULL,
1833 V4L2_CID_DV_TX_RXSENSE, 0, 1, 0, 0);
1834 state->have_edid0_ctrl = v4l2_ctrl_new_std(hdl, NULL,
1835 V4L2_CID_DV_TX_EDID_PRESENT, 0, 1, 0, 0);
1836 state->rgb_quantization_range_ctrl =
1837 v4l2_ctrl_new_std_menu(hdl, &adv7511_ctrl_ops,
1838 V4L2_CID_DV_TX_RGB_RANGE, V4L2_DV_RGB_RANGE_FULL,
1839 0, V4L2_DV_RGB_RANGE_AUTO);
1840 state->content_type_ctrl =
1841 v4l2_ctrl_new_std_menu(hdl, &adv7511_ctrl_ops,
1842 V4L2_CID_DV_TX_IT_CONTENT_TYPE, V4L2_DV_IT_CONTENT_TYPE_NO_ITC,
1843 0, V4L2_DV_IT_CONTENT_TYPE_NO_ITC);
1844 sd->ctrl_handler = hdl;
1845 if (hdl->error) {
1846 err = hdl->error;
1847 goto err_hdl;
1848 }
1849 state->pad.flags = MEDIA_PAD_FL_SINK;
1850 sd->entity.function = MEDIA_ENT_F_DV_ENCODER;
1851 err = media_entity_pads_init(&sd->entity, 1, &state->pad);
1852 if (err)
1853 goto err_hdl;
1854
1855 /* EDID and CEC i2c addr */
1856 state->i2c_edid_addr = state->pdata.i2c_edid << 1;
1857 state->i2c_cec_addr = state->pdata.i2c_cec << 1;
1858 state->i2c_pktmem_addr = state->pdata.i2c_pktmem << 1;
1859
1860 state->chip_revision = adv7511_rd(sd, 0x0);
1861 chip_id[0] = adv7511_rd(sd, 0xf5);
1862 chip_id[1] = adv7511_rd(sd, 0xf6);
1863 if (chip_id[0] != 0x75 || chip_id[1] != 0x11) {
1864 v4l2_err(sd, "chip_id != 0x7511, read 0x%02x%02x\n", chip_id[0],
1865 chip_id[1]);
1866 err = -EIO;
1867 goto err_entity;
1868 }
1869
1870 state->i2c_edid = i2c_new_dummy(client->adapter,
1871 state->i2c_edid_addr >> 1);
1872 if (state->i2c_edid == NULL) {
1873 v4l2_err(sd, "failed to register edid i2c client\n");
1874 err = -ENOMEM;
1875 goto err_entity;
1876 }
1877
1878 adv7511_wr(sd, 0xe1, state->i2c_cec_addr);
1879 if (state->pdata.cec_clk < 3000000 ||
1880 state->pdata.cec_clk > 100000000) {
1881 v4l2_err(sd, "%s: cec_clk %u outside range, disabling cec\n",
1882 __func__, state->pdata.cec_clk);
1883 state->pdata.cec_clk = 0;
1884 }
1885
1886 if (state->pdata.cec_clk) {
1887 state->i2c_cec = i2c_new_dummy(client->adapter,
1888 state->i2c_cec_addr >> 1);
1889 if (state->i2c_cec == NULL) {
1890 v4l2_err(sd, "failed to register cec i2c client\n");
1891 err = -ENOMEM;
1892 goto err_unreg_edid;
1893 }
1894 adv7511_wr(sd, 0xe2, 0x00); /* power up cec section */
1895 } else {
1896 adv7511_wr(sd, 0xe2, 0x01); /* power down cec section */
1897 }
1898
1899 state->i2c_pktmem = i2c_new_dummy(client->adapter, state->i2c_pktmem_addr >> 1);
1900 if (state->i2c_pktmem == NULL) {
1901 v4l2_err(sd, "failed to register pktmem i2c client\n");
1902 err = -ENOMEM;
1903 goto err_unreg_cec;
1904 }
1905
1906 state->work_queue = create_singlethread_workqueue(sd->name);
1907 if (state->work_queue == NULL) {
1908 v4l2_err(sd, "could not create workqueue\n");
1909 err = -ENOMEM;
1910 goto err_unreg_pktmem;
1911 }
1912
1913 INIT_DELAYED_WORK(&state->edid_handler, adv7511_edid_handler);
1914
1915 adv7511_init_setup(sd);
1916
1917 #if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC)
1918 state->cec_adap = cec_allocate_adapter(&adv7511_cec_adap_ops,
1919 state, dev_name(&client->dev), CEC_CAP_DEFAULTS,
1920 ADV7511_MAX_ADDRS);
1921 err = PTR_ERR_OR_ZERO(state->cec_adap);
1922 if (err) {
1923 destroy_workqueue(state->work_queue);
1924 goto err_unreg_pktmem;
1925 }
1926 #endif
1927
1928 adv7511_set_isr(sd, true);
1929 adv7511_check_monitor_present_status(sd);
1930
1931 v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
1932 client->addr << 1, client->adapter->name);
1933 return 0;
1934
1935 err_unreg_pktmem:
1936 i2c_unregister_device(state->i2c_pktmem);
1937 err_unreg_cec:
1938 if (state->i2c_cec)
1939 i2c_unregister_device(state->i2c_cec);
1940 err_unreg_edid:
1941 i2c_unregister_device(state->i2c_edid);
1942 err_entity:
1943 media_entity_cleanup(&sd->entity);
1944 err_hdl:
1945 v4l2_ctrl_handler_free(&state->hdl);
1946 return err;
1947 }
1948
1949 /* ----------------------------------------------------------------------- */
1950
adv7511_remove(struct i2c_client * client)1951 static int adv7511_remove(struct i2c_client *client)
1952 {
1953 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1954 struct adv7511_state *state = get_adv7511_state(sd);
1955
1956 state->chip_revision = -1;
1957
1958 v4l2_dbg(1, debug, sd, "%s removed @ 0x%x (%s)\n", client->name,
1959 client->addr << 1, client->adapter->name);
1960
1961 adv7511_set_isr(sd, false);
1962 adv7511_init_setup(sd);
1963 cancel_delayed_work(&state->edid_handler);
1964 i2c_unregister_device(state->i2c_edid);
1965 if (state->i2c_cec)
1966 i2c_unregister_device(state->i2c_cec);
1967 i2c_unregister_device(state->i2c_pktmem);
1968 destroy_workqueue(state->work_queue);
1969 v4l2_device_unregister_subdev(sd);
1970 media_entity_cleanup(&sd->entity);
1971 v4l2_ctrl_handler_free(sd->ctrl_handler);
1972 return 0;
1973 }
1974
1975 /* ----------------------------------------------------------------------- */
1976
1977 static const struct i2c_device_id adv7511_id[] = {
1978 { "adv7511", 0 },
1979 { }
1980 };
1981 MODULE_DEVICE_TABLE(i2c, adv7511_id);
1982
1983 static struct i2c_driver adv7511_driver = {
1984 .driver = {
1985 .name = "adv7511",
1986 },
1987 .probe = adv7511_probe,
1988 .remove = adv7511_remove,
1989 .id_table = adv7511_id,
1990 };
1991
1992 module_i2c_driver(adv7511_driver);
1993
