2 * Analog Devices ADV7511 HDMI Transmitter Device Driver
4 * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
6 * This program is free software; you may redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
11 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
12 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
13 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
14 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
15 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
16 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/i2c.h>
25 #include <linux/delay.h>
26 #include <linux/videodev2.h>
27 #include <linux/gpio.h>
28 #include <linux/workqueue.h>
29 #include <linux/v4l2-dv-timings.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-common.h>
32 #include <media/v4l2-ctrls.h>
33 #include <media/v4l2-dv-timings.h>
34 #include <media/adv7511.h>
37 module_param(debug, int, 0644);
38 MODULE_PARM_DESC(debug, "debug level (0-2)");
40 MODULE_DESCRIPTION("Analog Devices ADV7511 HDMI Transmitter Device Driver");
41 MODULE_AUTHOR("Hans Verkuil");
42 MODULE_LICENSE("GPL");
44 #define MASK_ADV7511_EDID_RDY_INT 0x04
45 #define MASK_ADV7511_MSEN_INT 0x40
46 #define MASK_ADV7511_HPD_INT 0x80
48 #define MASK_ADV7511_HPD_DETECT 0x40
49 #define MASK_ADV7511_MSEN_DETECT 0x20
50 #define MASK_ADV7511_EDID_RDY 0x10
52 #define EDID_MAX_RETRIES (8)
53 #define EDID_DELAY 250
54 #define EDID_MAX_SEGM 8
56 #define ADV7511_MAX_WIDTH 1920
57 #define ADV7511_MAX_HEIGHT 1200
58 #define ADV7511_MIN_PIXELCLOCK 20000000
59 #define ADV7511_MAX_PIXELCLOCK 225000000
62 **********************************************************************
64 * Arrays with configuration parameters for the ADV7511
66 **********************************************************************
69 struct i2c_reg_value {
74 struct adv7511_state_edid {
75 /* total number of blocks */
77 /* Number of segments read */
79 uint8_t data[EDID_MAX_SEGM * 256];
80 /* Number of EDID read retries left */
81 unsigned read_retries;
85 struct adv7511_state {
86 struct adv7511_platform_data pdata;
87 struct v4l2_subdev sd;
89 struct v4l2_ctrl_handler hdl;
91 uint8_t i2c_edid_addr;
93 /* Is the adv7511 powered on? */
95 /* Did we receive hotplug and rx-sense signals? */
97 /* timings from s_dv_timings */
98 struct v4l2_dv_timings dv_timings;
100 struct v4l2_ctrl *hdmi_mode_ctrl;
101 struct v4l2_ctrl *hotplug_ctrl;
102 struct v4l2_ctrl *rx_sense_ctrl;
103 struct v4l2_ctrl *have_edid0_ctrl;
104 struct v4l2_ctrl *rgb_quantization_range_ctrl;
105 struct i2c_client *i2c_edid;
106 struct adv7511_state_edid edid;
107 /* Running counter of the number of detected EDIDs (for debugging) */
108 unsigned edid_detect_counter;
109 struct workqueue_struct *work_queue;
110 struct delayed_work edid_handler; /* work entry */
113 static void adv7511_check_monitor_present_status(struct v4l2_subdev *sd);
114 static bool adv7511_check_edid_status(struct v4l2_subdev *sd);
115 static void adv7511_setup(struct v4l2_subdev *sd);
116 static int adv7511_s_i2s_clock_freq(struct v4l2_subdev *sd, u32 freq);
117 static int adv7511_s_clock_freq(struct v4l2_subdev *sd, u32 freq);
120 static const struct v4l2_dv_timings_cap adv7511_timings_cap = {
121 .type = V4L2_DV_BT_656_1120,
122 /* keep this initialization for compatibility with GCC < 4.4.6 */
124 V4L2_INIT_BT_TIMINGS(0, ADV7511_MAX_WIDTH, 0, ADV7511_MAX_HEIGHT,
125 ADV7511_MIN_PIXELCLOCK, ADV7511_MAX_PIXELCLOCK,
126 V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
127 V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT,
128 V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_REDUCED_BLANKING |
129 V4L2_DV_BT_CAP_CUSTOM)
132 static inline struct adv7511_state *get_adv7511_state(struct v4l2_subdev *sd)
134 return container_of(sd, struct adv7511_state, sd);
137 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
139 return &container_of(ctrl->handler, struct adv7511_state, hdl)->sd;
142 /* ------------------------ I2C ----------------------------------------------- */
144 static s32 adv_smbus_read_byte_data_check(struct i2c_client *client,
145 u8 command, bool check)
147 union i2c_smbus_data data;
149 if (!i2c_smbus_xfer(client->adapter, client->addr, client->flags,
150 I2C_SMBUS_READ, command,
151 I2C_SMBUS_BYTE_DATA, &data))
154 v4l_err(client, "error reading %02x, %02x\n",
155 client->addr, command);
159 static s32 adv_smbus_read_byte_data(struct i2c_client *client, u8 command)
162 for (i = 0; i < 3; i++) {
163 int ret = adv_smbus_read_byte_data_check(client, command, true);
166 v4l_err(client, "read ok after %d retries\n", i);
170 v4l_err(client, "read failed\n");
174 static int adv7511_rd(struct v4l2_subdev *sd, u8 reg)
176 struct i2c_client *client = v4l2_get_subdevdata(sd);
178 return adv_smbus_read_byte_data(client, reg);
181 static int adv7511_wr(struct v4l2_subdev *sd, u8 reg, u8 val)
183 struct i2c_client *client = v4l2_get_subdevdata(sd);
187 for (i = 0; i < 3; i++) {
188 ret = i2c_smbus_write_byte_data(client, reg, val);
192 v4l2_err(sd, "%s: i2c write error\n", __func__);
196 /* To set specific bits in the register, a clear-mask is given (to be AND-ed),
197 and then the value-mask (to be OR-ed). */
198 static inline void adv7511_wr_and_or(struct v4l2_subdev *sd, u8 reg, uint8_t clr_mask, uint8_t val_mask)
200 adv7511_wr(sd, reg, (adv7511_rd(sd, reg) & clr_mask) | val_mask);
203 static int adv_smbus_read_i2c_block_data(struct i2c_client *client,
204 u8 command, unsigned length, u8 *values)
206 union i2c_smbus_data data;
209 if (length > I2C_SMBUS_BLOCK_MAX)
210 length = I2C_SMBUS_BLOCK_MAX;
211 data.block[0] = length;
213 ret = i2c_smbus_xfer(client->adapter, client->addr, client->flags,
214 I2C_SMBUS_READ, command,
215 I2C_SMBUS_I2C_BLOCK_DATA, &data);
216 memcpy(values, data.block + 1, length);
220 static inline void adv7511_edid_rd(struct v4l2_subdev *sd, uint16_t len, uint8_t *buf)
222 struct adv7511_state *state = get_adv7511_state(sd);
226 v4l2_dbg(1, debug, sd, "%s:\n", __func__);
228 for (i = 0; !err && i < len; i += I2C_SMBUS_BLOCK_MAX)
229 err = adv_smbus_read_i2c_block_data(state->i2c_edid, i,
230 I2C_SMBUS_BLOCK_MAX, buf + i);
232 v4l2_err(sd, "%s: i2c read error\n", __func__);
235 static inline bool adv7511_have_hotplug(struct v4l2_subdev *sd)
237 return adv7511_rd(sd, 0x42) & MASK_ADV7511_HPD_DETECT;
240 static inline bool adv7511_have_rx_sense(struct v4l2_subdev *sd)
242 return adv7511_rd(sd, 0x42) & MASK_ADV7511_MSEN_DETECT;
245 static void adv7511_csc_conversion_mode(struct v4l2_subdev *sd, uint8_t mode)
247 adv7511_wr_and_or(sd, 0x18, 0x9f, (mode & 0x3)<<5);
250 static void adv7511_csc_coeff(struct v4l2_subdev *sd,
251 u16 A1, u16 A2, u16 A3, u16 A4,
252 u16 B1, u16 B2, u16 B3, u16 B4,
253 u16 C1, u16 C2, u16 C3, u16 C4)
256 adv7511_wr_and_or(sd, 0x18, 0xe0, A1>>8);
257 adv7511_wr(sd, 0x19, A1);
258 adv7511_wr_and_or(sd, 0x1A, 0xe0, A2>>8);
259 adv7511_wr(sd, 0x1B, A2);
260 adv7511_wr_and_or(sd, 0x1c, 0xe0, A3>>8);
261 adv7511_wr(sd, 0x1d, A3);
262 adv7511_wr_and_or(sd, 0x1e, 0xe0, A4>>8);
263 adv7511_wr(sd, 0x1f, A4);
266 adv7511_wr_and_or(sd, 0x20, 0xe0, B1>>8);
267 adv7511_wr(sd, 0x21, B1);
268 adv7511_wr_and_or(sd, 0x22, 0xe0, B2>>8);
269 adv7511_wr(sd, 0x23, B2);
270 adv7511_wr_and_or(sd, 0x24, 0xe0, B3>>8);
271 adv7511_wr(sd, 0x25, B3);
272 adv7511_wr_and_or(sd, 0x26, 0xe0, B4>>8);
273 adv7511_wr(sd, 0x27, B4);
276 adv7511_wr_and_or(sd, 0x28, 0xe0, C1>>8);
277 adv7511_wr(sd, 0x29, C1);
278 adv7511_wr_and_or(sd, 0x2A, 0xe0, C2>>8);
279 adv7511_wr(sd, 0x2B, C2);
280 adv7511_wr_and_or(sd, 0x2C, 0xe0, C3>>8);
281 adv7511_wr(sd, 0x2D, C3);
282 adv7511_wr_and_or(sd, 0x2E, 0xe0, C4>>8);
283 adv7511_wr(sd, 0x2F, C4);
286 static void adv7511_csc_rgb_full2limit(struct v4l2_subdev *sd, bool enable)
289 uint8_t csc_mode = 0;
290 adv7511_csc_conversion_mode(sd, csc_mode);
291 adv7511_csc_coeff(sd,
294 0, 0, 4096-564, 256);
296 adv7511_wr_and_or(sd, 0x18, 0x7f, 0x80);
297 /* AVI infoframe: Limited range RGB (16-235) */
298 adv7511_wr_and_or(sd, 0x57, 0xf3, 0x04);
301 adv7511_wr_and_or(sd, 0x18, 0x7f, 0x0);
302 /* AVI infoframe: Full range RGB (0-255) */
303 adv7511_wr_and_or(sd, 0x57, 0xf3, 0x08);
307 static void adv7511_set_IT_content_AVI_InfoFrame(struct v4l2_subdev *sd)
309 struct adv7511_state *state = get_adv7511_state(sd);
310 if (state->dv_timings.bt.standards & V4L2_DV_BT_STD_CEA861) {
311 /* CEA format, not IT */
312 adv7511_wr_and_or(sd, 0x57, 0x7f, 0x00);
315 adv7511_wr_and_or(sd, 0x57, 0x7f, 0x80);
319 static int adv7511_set_rgb_quantization_mode(struct v4l2_subdev *sd, struct v4l2_ctrl *ctrl)
325 case V4L2_DV_RGB_RANGE_AUTO: {
327 struct adv7511_state *state = get_adv7511_state(sd);
329 if (state->dv_timings.bt.standards & V4L2_DV_BT_STD_CEA861) {
330 /* cea format, RGB limited range (16-235) */
331 adv7511_csc_rgb_full2limit(sd, true);
333 /* not cea format, RGB full range (0-255) */
334 adv7511_csc_rgb_full2limit(sd, false);
338 case V4L2_DV_RGB_RANGE_LIMITED:
339 /* RGB limited range (16-235) */
340 adv7511_csc_rgb_full2limit(sd, true);
342 case V4L2_DV_RGB_RANGE_FULL:
343 /* RGB full range (0-255) */
344 adv7511_csc_rgb_full2limit(sd, false);
350 /* ------------------------------ CTRL OPS ------------------------------ */
352 static int adv7511_s_ctrl(struct v4l2_ctrl *ctrl)
354 struct v4l2_subdev *sd = to_sd(ctrl);
355 struct adv7511_state *state = get_adv7511_state(sd);
357 v4l2_dbg(1, debug, sd, "%s: ctrl id: %d, ctrl->val %d\n", __func__, ctrl->id, ctrl->val);
359 if (state->hdmi_mode_ctrl == ctrl) {
360 /* Set HDMI or DVI-D */
361 adv7511_wr_and_or(sd, 0xaf, 0xfd, ctrl->val == V4L2_DV_TX_MODE_HDMI ? 0x02 : 0x00);
364 if (state->rgb_quantization_range_ctrl == ctrl)
365 return adv7511_set_rgb_quantization_mode(sd, ctrl);
370 static const struct v4l2_ctrl_ops adv7511_ctrl_ops = {
371 .s_ctrl = adv7511_s_ctrl,
374 /* ---------------------------- CORE OPS ------------------------------------------- */
376 #ifdef CONFIG_VIDEO_ADV_DEBUG
377 static void adv7511_inv_register(struct v4l2_subdev *sd)
379 v4l2_info(sd, "0x000-0x0ff: Main Map\n");
382 static int adv7511_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
385 switch (reg->reg >> 8) {
387 reg->val = adv7511_rd(sd, reg->reg & 0xff);
390 v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
391 adv7511_inv_register(sd);
397 static int adv7511_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
399 switch (reg->reg >> 8) {
401 adv7511_wr(sd, reg->reg & 0xff, reg->val & 0xff);
404 v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
405 adv7511_inv_register(sd);
412 static int adv7511_log_status(struct v4l2_subdev *sd)
414 struct adv7511_state *state = get_adv7511_state(sd);
415 struct adv7511_state_edid *edid = &state->edid;
417 static const char * const states[] = {
423 "initializing HDCP repeater",
424 "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"
426 static const char * const errors[] = {
433 "max repeater cascade exceeded",
436 "9", "A", "B", "C", "D", "E", "F"
439 v4l2_info(sd, "power %s\n", state->power_on ? "on" : "off");
440 v4l2_info(sd, "%s hotplug, %s Rx Sense, %s EDID (%d block(s))\n",
441 (adv7511_rd(sd, 0x42) & MASK_ADV7511_HPD_DETECT) ? "detected" : "no",
442 (adv7511_rd(sd, 0x42) & MASK_ADV7511_MSEN_DETECT) ? "detected" : "no",
443 edid->segments ? "found" : "no",
445 v4l2_info(sd, "%s output %s\n",
446 (adv7511_rd(sd, 0xaf) & 0x02) ?
448 (adv7511_rd(sd, 0xa1) & 0x3c) ?
449 "disabled" : "enabled");
450 v4l2_info(sd, "state: %s, error: %s, detect count: %u, msk/irq: %02x/%02x\n",
451 states[adv7511_rd(sd, 0xc8) & 0xf],
452 errors[adv7511_rd(sd, 0xc8) >> 4], state->edid_detect_counter,
453 adv7511_rd(sd, 0x94), adv7511_rd(sd, 0x96));
454 v4l2_info(sd, "RGB quantization: %s range\n", adv7511_rd(sd, 0x18) & 0x80 ? "limited" : "full");
455 if (state->dv_timings.type == V4L2_DV_BT_656_1120)
456 v4l2_print_dv_timings(sd->name, "timings: ",
457 &state->dv_timings, false);
459 v4l2_info(sd, "no timings set\n");
460 v4l2_info(sd, "i2c edid addr: 0x%x\n", state->i2c_edid_addr);
461 v4l2_info(sd, "i2c cec addr: 0x%x\n", state->i2c_cec_addr);
465 /* Power up/down adv7511 */
466 static int adv7511_s_power(struct v4l2_subdev *sd, int on)
468 struct adv7511_state *state = get_adv7511_state(sd);
469 const int retries = 20;
472 v4l2_dbg(1, debug, sd, "%s: power %s\n", __func__, on ? "on" : "off");
474 state->power_on = on;
478 adv7511_wr_and_or(sd, 0x41, 0xbf, 0x40);
483 /* The adv7511 does not always come up immediately.
484 Retry multiple times. */
485 for (i = 0; i < retries; i++) {
486 adv7511_wr_and_or(sd, 0x41, 0xbf, 0x0);
487 if ((adv7511_rd(sd, 0x41) & 0x40) == 0)
489 adv7511_wr_and_or(sd, 0x41, 0xbf, 0x40);
493 v4l2_dbg(1, debug, sd, "%s: failed to powerup the adv7511!\n", __func__);
494 adv7511_s_power(sd, 0);
498 v4l2_dbg(1, debug, sd, "%s: needed %d retries to powerup the adv7511\n", __func__, i);
500 /* Reserved registers that must be set */
501 adv7511_wr(sd, 0x98, 0x03);
502 adv7511_wr_and_or(sd, 0x9a, 0xfe, 0x70);
503 adv7511_wr(sd, 0x9c, 0x30);
504 adv7511_wr_and_or(sd, 0x9d, 0xfc, 0x01);
505 adv7511_wr(sd, 0xa2, 0xa4);
506 adv7511_wr(sd, 0xa3, 0xa4);
507 adv7511_wr(sd, 0xe0, 0xd0);
508 adv7511_wr(sd, 0xf9, 0x00);
510 adv7511_wr(sd, 0x43, state->i2c_edid_addr);
512 /* Set number of attempts to read the EDID */
513 adv7511_wr(sd, 0xc9, 0xf);
517 /* Enable interrupts */
518 static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable)
520 uint8_t irqs = MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT;
524 v4l2_dbg(2, debug, sd, "%s: %s\n", __func__, enable ? "enable" : "disable");
526 /* The datasheet says that the EDID ready interrupt should be
527 disabled if there is no hotplug. */
530 else if (adv7511_have_hotplug(sd))
531 irqs |= MASK_ADV7511_EDID_RDY_INT;
534 * This i2c write can fail (approx. 1 in 1000 writes). But it
535 * is essential that this register is correct, so retry it
538 * Note that the i2c write does not report an error, but the readback
539 * clearly shows the wrong value.
542 adv7511_wr(sd, 0x94, irqs);
543 irqs_rd = adv7511_rd(sd, 0x94);
544 } while (retries-- && irqs_rd != irqs);
548 v4l2_err(sd, "Could not set interrupts: hw failure?\n");
551 /* Interrupt handler */
552 static int adv7511_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
556 /* disable interrupts to prevent a race condition */
557 adv7511_set_isr(sd, false);
558 irq_status = adv7511_rd(sd, 0x96);
559 /* clear detected interrupts */
560 adv7511_wr(sd, 0x96, irq_status);
562 v4l2_dbg(1, debug, sd, "%s: irq 0x%x\n", __func__, irq_status);
564 if (irq_status & (MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT))
565 adv7511_check_monitor_present_status(sd);
566 if (irq_status & MASK_ADV7511_EDID_RDY_INT)
567 adv7511_check_edid_status(sd);
569 /* enable interrupts */
570 adv7511_set_isr(sd, true);
577 static int adv7511_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
579 struct adv7511_state *state = get_adv7511_state(sd);
583 if ((edid->blocks == 0) || (edid->blocks > 256))
587 if (!state->edid.segments) {
588 v4l2_dbg(1, debug, sd, "EDID segment 0 not found\n");
591 if (edid->start_block >= state->edid.segments * 2)
593 if ((edid->blocks + edid->start_block) >= state->edid.segments * 2)
594 edid->blocks = state->edid.segments * 2 - edid->start_block;
596 memcpy(edid->edid, &state->edid.data[edid->start_block * 128],
601 static const struct v4l2_subdev_pad_ops adv7511_pad_ops = {
602 .get_edid = adv7511_get_edid,
605 static const struct v4l2_subdev_core_ops adv7511_core_ops = {
606 .log_status = adv7511_log_status,
607 #ifdef CONFIG_VIDEO_ADV_DEBUG
608 .g_register = adv7511_g_register,
609 .s_register = adv7511_s_register,
611 .s_power = adv7511_s_power,
612 .interrupt_service_routine = adv7511_isr,
615 /* ------------------------------ VIDEO OPS ------------------------------ */
617 /* Enable/disable adv7511 output */
618 static int adv7511_s_stream(struct v4l2_subdev *sd, int enable)
620 struct adv7511_state *state = get_adv7511_state(sd);
622 v4l2_dbg(1, debug, sd, "%s: %sable\n", __func__, (enable ? "en" : "dis"));
623 adv7511_wr_and_or(sd, 0xa1, ~0x3c, (enable ? 0 : 0x3c));
625 adv7511_check_monitor_present_status(sd);
627 adv7511_s_power(sd, 0);
628 state->have_monitor = false;
633 static int adv7511_s_dv_timings(struct v4l2_subdev *sd,
634 struct v4l2_dv_timings *timings)
636 struct adv7511_state *state = get_adv7511_state(sd);
638 v4l2_dbg(1, debug, sd, "%s:\n", __func__);
640 /* quick sanity check */
641 if (!v4l2_valid_dv_timings(timings, &adv7511_timings_cap, NULL, NULL))
644 /* Fill the optional fields .standards and .flags in struct v4l2_dv_timings
645 if the format is one of the CEA or DMT timings. */
646 v4l2_find_dv_timings_cap(timings, &adv7511_timings_cap, 0, NULL, NULL);
648 timings->bt.flags &= ~V4L2_DV_FL_REDUCED_FPS;
651 state->dv_timings = *timings;
653 /* update quantization range based on new dv_timings */
654 adv7511_set_rgb_quantization_mode(sd, state->rgb_quantization_range_ctrl);
656 /* update AVI infoframe */
657 adv7511_set_IT_content_AVI_InfoFrame(sd);
662 static int adv7511_g_dv_timings(struct v4l2_subdev *sd,
663 struct v4l2_dv_timings *timings)
665 struct adv7511_state *state = get_adv7511_state(sd);
667 v4l2_dbg(1, debug, sd, "%s:\n", __func__);
672 *timings = state->dv_timings;
677 static int adv7511_enum_dv_timings(struct v4l2_subdev *sd,
678 struct v4l2_enum_dv_timings *timings)
680 return v4l2_enum_dv_timings_cap(timings, &adv7511_timings_cap, NULL, NULL);
683 static int adv7511_dv_timings_cap(struct v4l2_subdev *sd,
684 struct v4l2_dv_timings_cap *cap)
686 *cap = adv7511_timings_cap;
690 static const struct v4l2_subdev_video_ops adv7511_video_ops = {
691 .s_stream = adv7511_s_stream,
692 .s_dv_timings = adv7511_s_dv_timings,
693 .g_dv_timings = adv7511_g_dv_timings,
694 .enum_dv_timings = adv7511_enum_dv_timings,
695 .dv_timings_cap = adv7511_dv_timings_cap,
698 /* ------------------------------ AUDIO OPS ------------------------------ */
699 static int adv7511_s_audio_stream(struct v4l2_subdev *sd, int enable)
701 v4l2_dbg(1, debug, sd, "%s: %sable\n", __func__, (enable ? "en" : "dis"));
704 adv7511_wr_and_or(sd, 0x4b, 0x3f, 0x80);
706 adv7511_wr_and_or(sd, 0x4b, 0x3f, 0x40);
711 static int adv7511_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
716 case 32000: N = 4096; break;
717 case 44100: N = 6272; break;
718 case 48000: N = 6144; break;
719 case 88200: N = 12544; break;
720 case 96000: N = 12288; break;
721 case 176400: N = 25088; break;
722 case 192000: N = 24576; break;
727 /* Set N (used with CTS to regenerate the audio clock) */
728 adv7511_wr(sd, 0x01, (N >> 16) & 0xf);
729 adv7511_wr(sd, 0x02, (N >> 8) & 0xff);
730 adv7511_wr(sd, 0x03, N & 0xff);
735 static int adv7511_s_i2s_clock_freq(struct v4l2_subdev *sd, u32 freq)
740 case 32000: i2s_sf = 0x30; break;
741 case 44100: i2s_sf = 0x00; break;
742 case 48000: i2s_sf = 0x20; break;
743 case 88200: i2s_sf = 0x80; break;
744 case 96000: i2s_sf = 0xa0; break;
745 case 176400: i2s_sf = 0xc0; break;
746 case 192000: i2s_sf = 0xe0; break;
751 /* Set sampling frequency for I2S audio to 48 kHz */
752 adv7511_wr_and_or(sd, 0x15, 0xf, i2s_sf);
757 static int adv7511_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config)
759 /* Only 2 channels in use for application */
760 adv7511_wr_and_or(sd, 0x73, 0xf8, 0x1);
761 /* Speaker mapping */
762 adv7511_wr(sd, 0x76, 0x00);
764 /* 16 bit audio word length */
765 adv7511_wr_and_or(sd, 0x14, 0xf0, 0x02);
770 static const struct v4l2_subdev_audio_ops adv7511_audio_ops = {
771 .s_stream = adv7511_s_audio_stream,
772 .s_clock_freq = adv7511_s_clock_freq,
773 .s_i2s_clock_freq = adv7511_s_i2s_clock_freq,
774 .s_routing = adv7511_s_routing,
777 /* --------------------- SUBDEV OPS --------------------------------------- */
779 static const struct v4l2_subdev_ops adv7511_ops = {
780 .core = &adv7511_core_ops,
781 .pad = &adv7511_pad_ops,
782 .video = &adv7511_video_ops,
783 .audio = &adv7511_audio_ops,
786 /* ----------------------------------------------------------------------- */
787 static void adv7511_dbg_dump_edid(int lvl, int debug, struct v4l2_subdev *sd, int segment, uint8_t *buf)
791 v4l2_dbg(lvl, debug, sd, "edid segment %d\n", segment);
792 for (i = 0; i < 256; i += 16) {
796 v4l2_dbg(lvl, debug, sd, "\n");
797 for (j = i; j < i + 16; j++) {
798 sprintf(bp, "0x%02x, ", buf[j]);
802 v4l2_dbg(lvl, debug, sd, "%s\n", b);
807 static void adv7511_edid_handler(struct work_struct *work)
809 struct delayed_work *dwork = to_delayed_work(work);
810 struct adv7511_state *state = container_of(dwork, struct adv7511_state, edid_handler);
811 struct v4l2_subdev *sd = &state->sd;
812 struct adv7511_edid_detect ed;
814 v4l2_dbg(1, debug, sd, "%s:\n", __func__);
816 if (adv7511_check_edid_status(sd)) {
817 /* Return if we received the EDID. */
821 if (adv7511_have_hotplug(sd)) {
822 /* We must retry reading the EDID several times, it is possible
823 * that initially the EDID couldn't be read due to i2c errors
824 * (DVI connectors are particularly prone to this problem). */
825 if (state->edid.read_retries) {
826 state->edid.read_retries--;
827 v4l2_dbg(1, debug, sd, "%s: edid read failed\n", __func__);
828 state->have_monitor = false;
829 adv7511_s_power(sd, false);
830 adv7511_s_power(sd, true);
831 queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
836 /* We failed to read the EDID, so send an event for this. */
838 ed.segment = adv7511_rd(sd, 0xc4);
839 v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
840 v4l2_dbg(1, debug, sd, "%s: no edid found\n", __func__);
843 static void adv7511_audio_setup(struct v4l2_subdev *sd)
845 v4l2_dbg(1, debug, sd, "%s\n", __func__);
847 adv7511_s_i2s_clock_freq(sd, 48000);
848 adv7511_s_clock_freq(sd, 48000);
849 adv7511_s_routing(sd, 0, 0, 0);
852 /* Configure hdmi transmitter. */
853 static void adv7511_setup(struct v4l2_subdev *sd)
855 struct adv7511_state *state = get_adv7511_state(sd);
856 v4l2_dbg(1, debug, sd, "%s\n", __func__);
858 /* Input format: RGB 4:4:4 */
859 adv7511_wr_and_or(sd, 0x15, 0xf0, 0x0);
860 /* Output format: RGB 4:4:4 */
861 adv7511_wr_and_or(sd, 0x16, 0x7f, 0x0);
862 /* 1st order interpolation 4:2:2 -> 4:4:4 up conversion, Aspect ratio: 16:9 */
863 adv7511_wr_and_or(sd, 0x17, 0xf9, 0x06);
864 /* Disable pixel repetition */
865 adv7511_wr_and_or(sd, 0x3b, 0x9f, 0x0);
867 adv7511_wr_and_or(sd, 0x18, 0x7f, 0x0);
868 /* Output format: RGB 4:4:4, Active Format Information is valid,
870 adv7511_wr_and_or(sd, 0x55, 0x9c, 0x12);
871 /* AVI Info frame packet enable, Audio Info frame disable */
872 adv7511_wr_and_or(sd, 0x44, 0xe7, 0x10);
873 /* Colorimetry, Active format aspect ratio: same as picure. */
874 adv7511_wr(sd, 0x56, 0xa8);
876 adv7511_wr_and_or(sd, 0xaf, 0xed, 0x0);
878 /* Positive clk edge capture for input video clock */
879 adv7511_wr_and_or(sd, 0xba, 0x1f, 0x60);
881 adv7511_audio_setup(sd);
883 v4l2_ctrl_handler_setup(&state->hdl);
886 static void adv7511_notify_monitor_detect(struct v4l2_subdev *sd)
888 struct adv7511_monitor_detect mdt;
889 struct adv7511_state *state = get_adv7511_state(sd);
891 mdt.present = state->have_monitor;
892 v4l2_subdev_notify(sd, ADV7511_MONITOR_DETECT, (void *)&mdt);
895 static void adv7511_check_monitor_present_status(struct v4l2_subdev *sd)
897 struct adv7511_state *state = get_adv7511_state(sd);
898 /* read hotplug and rx-sense state */
899 uint8_t status = adv7511_rd(sd, 0x42);
901 v4l2_dbg(1, debug, sd, "%s: status: 0x%x%s%s\n",
904 status & MASK_ADV7511_HPD_DETECT ? ", hotplug" : "",
905 status & MASK_ADV7511_MSEN_DETECT ? ", rx-sense" : "");
907 /* update read only ctrls */
908 v4l2_ctrl_s_ctrl(state->hotplug_ctrl, adv7511_have_hotplug(sd) ? 0x1 : 0x0);
909 v4l2_ctrl_s_ctrl(state->rx_sense_ctrl, adv7511_have_rx_sense(sd) ? 0x1 : 0x0);
910 v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, state->edid.segments ? 0x1 : 0x0);
912 if ((status & MASK_ADV7511_HPD_DETECT) && ((status & MASK_ADV7511_MSEN_DETECT) || state->edid.segments)) {
913 v4l2_dbg(1, debug, sd, "%s: hotplug and (rx-sense or edid)\n", __func__);
914 if (!state->have_monitor) {
915 v4l2_dbg(1, debug, sd, "%s: monitor detected\n", __func__);
916 state->have_monitor = true;
917 adv7511_set_isr(sd, true);
918 if (!adv7511_s_power(sd, true)) {
919 v4l2_dbg(1, debug, sd, "%s: monitor detected, powerup failed\n", __func__);
923 adv7511_notify_monitor_detect(sd);
924 state->edid.read_retries = EDID_MAX_RETRIES;
925 queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
927 } else if (status & MASK_ADV7511_HPD_DETECT) {
928 v4l2_dbg(1, debug, sd, "%s: hotplug detected\n", __func__);
929 state->edid.read_retries = EDID_MAX_RETRIES;
930 queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
931 } else if (!(status & MASK_ADV7511_HPD_DETECT)) {
932 v4l2_dbg(1, debug, sd, "%s: hotplug not detected\n", __func__);
933 if (state->have_monitor) {
934 v4l2_dbg(1, debug, sd, "%s: monitor not detected\n", __func__);
935 state->have_monitor = false;
936 adv7511_notify_monitor_detect(sd);
938 adv7511_s_power(sd, false);
939 memset(&state->edid, 0, sizeof(struct adv7511_state_edid));
943 static bool edid_block_verify_crc(uint8_t *edid_block)
948 for (i = 0; i < 128; i++)
949 sum += *(edid_block + i);
953 static bool edid_segment_verify_crc(struct v4l2_subdev *sd, u32 segment)
955 struct adv7511_state *state = get_adv7511_state(sd);
956 u32 blocks = state->edid.blocks;
957 uint8_t *data = state->edid.data;
959 if (edid_block_verify_crc(&data[segment * 256])) {
960 if ((segment + 1) * 2 <= blocks)
961 return edid_block_verify_crc(&data[segment * 256 + 128]);
967 static bool adv7511_check_edid_status(struct v4l2_subdev *sd)
969 struct adv7511_state *state = get_adv7511_state(sd);
970 uint8_t edidRdy = adv7511_rd(sd, 0xc5);
972 v4l2_dbg(1, debug, sd, "%s: edid ready (retries: %d)\n",
973 __func__, EDID_MAX_RETRIES - state->edid.read_retries);
975 if (state->edid.complete)
978 if (edidRdy & MASK_ADV7511_EDID_RDY) {
979 int segment = adv7511_rd(sd, 0xc4);
980 struct adv7511_edid_detect ed;
982 if (segment >= EDID_MAX_SEGM) {
983 v4l2_err(sd, "edid segment number too big\n");
986 v4l2_dbg(1, debug, sd, "%s: got segment %d\n", __func__, segment);
987 adv7511_edid_rd(sd, 256, &state->edid.data[segment * 256]);
988 adv7511_dbg_dump_edid(2, debug, sd, segment, &state->edid.data[segment * 256]);
990 state->edid.blocks = state->edid.data[0x7e] + 1;
991 v4l2_dbg(1, debug, sd, "%s: %d blocks in total\n", __func__, state->edid.blocks);
993 if (!edid_segment_verify_crc(sd, segment)) {
994 /* edid crc error, force reread of edid segment */
995 v4l2_dbg(1, debug, sd, "%s: edid crc error\n", __func__);
996 state->have_monitor = false;
997 adv7511_s_power(sd, false);
998 adv7511_s_power(sd, true);
1001 /* one more segment read ok */
1002 state->edid.segments = segment + 1;
1003 if (((state->edid.data[0x7e] >> 1) + 1) > state->edid.segments) {
1004 /* Request next EDID segment */
1005 v4l2_dbg(1, debug, sd, "%s: request segment %d\n", __func__, state->edid.segments);
1006 adv7511_wr(sd, 0xc9, 0xf);
1007 adv7511_wr(sd, 0xc4, state->edid.segments);
1008 state->edid.read_retries = EDID_MAX_RETRIES;
1009 queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
1013 v4l2_dbg(1, debug, sd, "%s: edid complete with %d segment(s)\n", __func__, state->edid.segments);
1014 state->edid.complete = true;
1016 /* report when we have all segments
1017 but report only for segment 0
1021 state->edid_detect_counter++;
1022 v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, state->edid.segments ? 0x1 : 0x0);
1023 v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
1030 /* ----------------------------------------------------------------------- */
1032 static void adv7511_init_setup(struct v4l2_subdev *sd)
1034 struct adv7511_state *state = get_adv7511_state(sd);
1035 struct adv7511_state_edid *edid = &state->edid;
1037 v4l2_dbg(1, debug, sd, "%s\n", __func__);
1039 /* clear all interrupts */
1040 adv7511_wr(sd, 0x96, 0xff);
1041 memset(edid, 0, sizeof(struct adv7511_state_edid));
1042 state->have_monitor = false;
1043 adv7511_set_isr(sd, false);
1044 adv7511_s_stream(sd, false);
1045 adv7511_s_audio_stream(sd, false);
1048 static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *id)
1050 struct adv7511_state *state;
1051 struct adv7511_platform_data *pdata = client->dev.platform_data;
1052 struct v4l2_ctrl_handler *hdl;
1053 struct v4l2_subdev *sd;
1057 /* Check if the adapter supports the needed features */
1058 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1061 state = devm_kzalloc(&client->dev, sizeof(struct adv7511_state), GFP_KERNEL);
1067 v4l_err(client, "No platform data!\n");
1070 memcpy(&state->pdata, pdata, sizeof(state->pdata));
1074 v4l2_dbg(1, debug, sd, "detecting adv7511 client on address 0x%x\n",
1077 v4l2_i2c_subdev_init(sd, client, &adv7511_ops);
1080 v4l2_ctrl_handler_init(hdl, 10);
1081 /* add in ascending ID order */
1082 state->hdmi_mode_ctrl = v4l2_ctrl_new_std_menu(hdl, &adv7511_ctrl_ops,
1083 V4L2_CID_DV_TX_MODE, V4L2_DV_TX_MODE_HDMI,
1084 0, V4L2_DV_TX_MODE_DVI_D);
1085 state->hotplug_ctrl = v4l2_ctrl_new_std(hdl, NULL,
1086 V4L2_CID_DV_TX_HOTPLUG, 0, 1, 0, 0);
1087 state->rx_sense_ctrl = v4l2_ctrl_new_std(hdl, NULL,
1088 V4L2_CID_DV_TX_RXSENSE, 0, 1, 0, 0);
1089 state->have_edid0_ctrl = v4l2_ctrl_new_std(hdl, NULL,
1090 V4L2_CID_DV_TX_EDID_PRESENT, 0, 1, 0, 0);
1091 state->rgb_quantization_range_ctrl =
1092 v4l2_ctrl_new_std_menu(hdl, &adv7511_ctrl_ops,
1093 V4L2_CID_DV_TX_RGB_RANGE, V4L2_DV_RGB_RANGE_FULL,
1094 0, V4L2_DV_RGB_RANGE_AUTO);
1095 sd->ctrl_handler = hdl;
1100 state->hdmi_mode_ctrl->is_private = true;
1101 state->hotplug_ctrl->is_private = true;
1102 state->rx_sense_ctrl->is_private = true;
1103 state->have_edid0_ctrl->is_private = true;
1104 state->rgb_quantization_range_ctrl->is_private = true;
1106 state->pad.flags = MEDIA_PAD_FL_SINK;
1107 err = media_entity_init(&sd->entity, 1, &state->pad, 0);
1111 /* EDID and CEC i2c addr */
1112 state->i2c_edid_addr = state->pdata.i2c_edid << 1;
1113 state->i2c_cec_addr = state->pdata.i2c_cec << 1;
1115 state->chip_revision = adv7511_rd(sd, 0x0);
1116 chip_id[0] = adv7511_rd(sd, 0xf5);
1117 chip_id[1] = adv7511_rd(sd, 0xf6);
1118 if (chip_id[0] != 0x75 || chip_id[1] != 0x11) {
1119 v4l2_err(sd, "chip_id != 0x7511, read 0x%02x%02x\n", chip_id[0], chip_id[1]);
1124 state->i2c_edid = i2c_new_dummy(client->adapter, state->i2c_edid_addr >> 1);
1125 if (state->i2c_edid == NULL) {
1126 v4l2_err(sd, "failed to register edid i2c client\n");
1131 adv7511_wr(sd, 0xe2, 0x01); /* power down cec section */
1132 state->work_queue = create_singlethread_workqueue(sd->name);
1133 if (state->work_queue == NULL) {
1134 v4l2_err(sd, "could not create workqueue\n");
1139 INIT_DELAYED_WORK(&state->edid_handler, adv7511_edid_handler);
1141 adv7511_init_setup(sd);
1142 adv7511_set_isr(sd, true);
1143 adv7511_check_monitor_present_status(sd);
1145 v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
1146 client->addr << 1, client->adapter->name);
1150 i2c_unregister_device(state->i2c_edid);
1152 media_entity_cleanup(&sd->entity);
1154 v4l2_ctrl_handler_free(&state->hdl);
1158 /* ----------------------------------------------------------------------- */
1160 static int adv7511_remove(struct i2c_client *client)
1162 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1163 struct adv7511_state *state = get_adv7511_state(sd);
1165 state->chip_revision = -1;
1167 v4l2_dbg(1, debug, sd, "%s removed @ 0x%x (%s)\n", client->name,
1168 client->addr << 1, client->adapter->name);
1170 adv7511_init_setup(sd);
1171 cancel_delayed_work(&state->edid_handler);
1172 i2c_unregister_device(state->i2c_edid);
1173 destroy_workqueue(state->work_queue);
1174 v4l2_device_unregister_subdev(sd);
1175 media_entity_cleanup(&sd->entity);
1176 v4l2_ctrl_handler_free(sd->ctrl_handler);
1180 /* ----------------------------------------------------------------------- */
1182 static struct i2c_device_id adv7511_id[] = {
1186 MODULE_DEVICE_TABLE(i2c, adv7511_id);
1188 static struct i2c_driver adv7511_driver = {
1190 .owner = THIS_MODULE,
1193 .probe = adv7511_probe,
1194 .remove = adv7511_remove,
1195 .id_table = adv7511_id,
1198 module_i2c_driver(adv7511_driver);