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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2018 Renesas Electronics
4 *
5 * Copyright (C) 2016 Atmel
6 * Bo Shen <voice.shen@atmel.com>
7 *
8 * Authors: Bo Shen <voice.shen@atmel.com>
9 * Boris Brezillon <boris.brezillon@free-electrons.com>
10 * Wu, Songjun <Songjun.Wu@atmel.com>
11 *
12 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
13 */
14
15#include <linux/gpio/consumer.h>
16#include <linux/i2c-mux.h>
17#include <linux/i2c.h>
18#include <linux/media-bus-format.h>
19#include <linux/module.h>
20#include <linux/regmap.h>
21#include <linux/regulator/consumer.h>
22#include <linux/clk.h>
23
24#include <drm/drm_atomic_helper.h>
25#include <drm/drm_bridge.h>
26#include <drm/drm_drv.h>
27#include <drm/drm_edid.h>
28#include <drm/drm_print.h>
29#include <drm/drm_probe_helper.h>
30
31#include <sound/hdmi-codec.h>
32
33#define SII902X_TPI_VIDEO_DATA 0x0
34
35#define SII902X_TPI_PIXEL_REPETITION 0x8
36#define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT BIT(5)
37#define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE BIT(4)
38#define SII902X_TPI_AVI_PIXEL_REP_4X 3
39#define SII902X_TPI_AVI_PIXEL_REP_2X 1
40#define SII902X_TPI_AVI_PIXEL_REP_NONE 0
41#define SII902X_TPI_CLK_RATIO_HALF (0 << 6)
42#define SII902X_TPI_CLK_RATIO_1X (1 << 6)
43#define SII902X_TPI_CLK_RATIO_2X (2 << 6)
44#define SII902X_TPI_CLK_RATIO_4X (3 << 6)
45
46#define SII902X_TPI_AVI_IN_FORMAT 0x9
47#define SII902X_TPI_AVI_INPUT_BITMODE_12BIT BIT(7)
48#define SII902X_TPI_AVI_INPUT_DITHER BIT(6)
49#define SII902X_TPI_AVI_INPUT_RANGE_LIMITED (2 << 2)
50#define SII902X_TPI_AVI_INPUT_RANGE_FULL (1 << 2)
51#define SII902X_TPI_AVI_INPUT_RANGE_AUTO (0 << 2)
52#define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK (3 << 0)
53#define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0)
54#define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0)
55#define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB (0 << 0)
56
57#define SII902X_TPI_AVI_INFOFRAME 0x0c
58
59#define SII902X_SYS_CTRL_DATA 0x1a
60#define SII902X_SYS_CTRL_PWR_DWN BIT(4)
61#define SII902X_SYS_CTRL_AV_MUTE BIT(3)
62#define SII902X_SYS_CTRL_DDC_BUS_REQ BIT(2)
63#define SII902X_SYS_CTRL_DDC_BUS_GRTD BIT(1)
64#define SII902X_SYS_CTRL_OUTPUT_MODE BIT(0)
65#define SII902X_SYS_CTRL_OUTPUT_HDMI 1
66#define SII902X_SYS_CTRL_OUTPUT_DVI 0
67
68#define SII902X_REG_CHIPID(n) (0x1b + (n))
69
70#define SII902X_PWR_STATE_CTRL 0x1e
71#define SII902X_AVI_POWER_STATE_MSK GENMASK(1, 0)
72#define SII902X_AVI_POWER_STATE_D(l) ((l) & SII902X_AVI_POWER_STATE_MSK)
73
74/* Audio */
75#define SII902X_TPI_I2S_ENABLE_MAPPING_REG 0x1f
76#define SII902X_TPI_I2S_CONFIG_FIFO0 (0 << 0)
77#define SII902X_TPI_I2S_CONFIG_FIFO1 (1 << 0)
78#define SII902X_TPI_I2S_CONFIG_FIFO2 (2 << 0)
79#define SII902X_TPI_I2S_CONFIG_FIFO3 (3 << 0)
80#define SII902X_TPI_I2S_LEFT_RIGHT_SWAP (1 << 2)
81#define SII902X_TPI_I2S_AUTO_DOWNSAMPLE (1 << 3)
82#define SII902X_TPI_I2S_SELECT_SD0 (0 << 4)
83#define SII902X_TPI_I2S_SELECT_SD1 (1 << 4)
84#define SII902X_TPI_I2S_SELECT_SD2 (2 << 4)
85#define SII902X_TPI_I2S_SELECT_SD3 (3 << 4)
86#define SII902X_TPI_I2S_FIFO_ENABLE (1 << 7)
87
88#define SII902X_TPI_I2S_INPUT_CONFIG_REG 0x20
89#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES (0 << 0)
90#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO (1 << 0)
91#define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST (0 << 1)
92#define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST (1 << 1)
93#define SII902X_TPI_I2S_SD_JUSTIFY_LEFT (0 << 2)
94#define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT (1 << 2)
95#define SII902X_TPI_I2S_WS_POLARITY_LOW (0 << 3)
96#define SII902X_TPI_I2S_WS_POLARITY_HIGH (1 << 3)
97#define SII902X_TPI_I2S_MCLK_MULTIPLIER_128 (0 << 4)
98#define SII902X_TPI_I2S_MCLK_MULTIPLIER_256 (1 << 4)
99#define SII902X_TPI_I2S_MCLK_MULTIPLIER_384 (2 << 4)
100#define SII902X_TPI_I2S_MCLK_MULTIPLIER_512 (3 << 4)
101#define SII902X_TPI_I2S_MCLK_MULTIPLIER_768 (4 << 4)
102#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024 (5 << 4)
103#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152 (6 << 4)
104#define SII902X_TPI_I2S_MCLK_MULTIPLIER_192 (7 << 4)
105#define SII902X_TPI_I2S_SCK_EDGE_FALLING (0 << 7)
106#define SII902X_TPI_I2S_SCK_EDGE_RISING (1 << 7)
107
108#define SII902X_TPI_I2S_STRM_HDR_BASE 0x21
109#define SII902X_TPI_I2S_STRM_HDR_SIZE 5
110
111#define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG 0x26
112#define SII902X_TPI_AUDIO_CODING_STREAM_HEADER (0 << 0)
113#define SII902X_TPI_AUDIO_CODING_PCM (1 << 0)
114#define SII902X_TPI_AUDIO_CODING_AC3 (2 << 0)
115#define SII902X_TPI_AUDIO_CODING_MPEG1 (3 << 0)
116#define SII902X_TPI_AUDIO_CODING_MP3 (4 << 0)
117#define SII902X_TPI_AUDIO_CODING_MPEG2 (5 << 0)
118#define SII902X_TPI_AUDIO_CODING_AAC (6 << 0)
119#define SII902X_TPI_AUDIO_CODING_DTS (7 << 0)
120#define SII902X_TPI_AUDIO_CODING_ATRAC (8 << 0)
121#define SII902X_TPI_AUDIO_MUTE_DISABLE (0 << 4)
122#define SII902X_TPI_AUDIO_MUTE_ENABLE (1 << 4)
123#define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS (0 << 5)
124#define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS (1 << 5)
125#define SII902X_TPI_AUDIO_INTERFACE_DISABLE (0 << 6)
126#define SII902X_TPI_AUDIO_INTERFACE_SPDIF (1 << 6)
127#define SII902X_TPI_AUDIO_INTERFACE_I2S (2 << 6)
128
129#define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG 0x27
130#define SII902X_TPI_AUDIO_FREQ_STREAM (0 << 3)
131#define SII902X_TPI_AUDIO_FREQ_32KHZ (1 << 3)
132#define SII902X_TPI_AUDIO_FREQ_44KHZ (2 << 3)
133#define SII902X_TPI_AUDIO_FREQ_48KHZ (3 << 3)
134#define SII902X_TPI_AUDIO_FREQ_88KHZ (4 << 3)
135#define SII902X_TPI_AUDIO_FREQ_96KHZ (5 << 3)
136#define SII902X_TPI_AUDIO_FREQ_176KHZ (6 << 3)
137#define SII902X_TPI_AUDIO_FREQ_192KHZ (7 << 3)
138#define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM (0 << 6)
139#define SII902X_TPI_AUDIO_SAMPLE_SIZE_16 (1 << 6)
140#define SII902X_TPI_AUDIO_SAMPLE_SIZE_20 (2 << 6)
141#define SII902X_TPI_AUDIO_SAMPLE_SIZE_24 (3 << 6)
142
143#define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG 0x28
144
145#define SII902X_INT_ENABLE 0x3c
146#define SII902X_INT_STATUS 0x3d
147#define SII902X_HOTPLUG_EVENT BIT(0)
148#define SII902X_PLUGGED_STATUS BIT(2)
149
150#define SII902X_REG_TPI_RQB 0xc7
151
152/* Indirect internal register access */
153#define SII902X_IND_SET_PAGE 0xbc
154#define SII902X_IND_OFFSET 0xbd
155#define SII902X_IND_VALUE 0xbe
156
157#define SII902X_TPI_MISC_INFOFRAME_BASE 0xbf
158#define SII902X_TPI_MISC_INFOFRAME_END 0xde
159#define SII902X_TPI_MISC_INFOFRAME_SIZE \
160 (SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
161
162#define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500
163
164#define SII902X_AUDIO_PORT_INDEX 3
165
166struct sii902x {
167 struct i2c_client *i2c;
168 struct regmap *regmap;
169 struct drm_bridge bridge;
170 struct drm_bridge *next_bridge;
171 struct drm_connector connector;
172 struct gpio_desc *reset_gpio;
173 struct i2c_mux_core *i2cmux;
174 bool sink_is_hdmi;
175 /*
176 * Mutex protects audio and video functions from interfering
177 * each other, by keeping their i2c command sequences atomic.
178 */
179 struct mutex mutex;
180 struct sii902x_audio {
181 struct platform_device *pdev;
182 struct clk *mclk;
183 u32 i2s_fifo_sequence[4];
184 } audio;
185};
186
187static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
188{
189 union i2c_smbus_data data;
190 int ret;
191
192 ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
193 I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
194
195 if (ret < 0)
196 return ret;
197
198 *val = data.byte;
199 return 0;
200}
201
202static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
203{
204 union i2c_smbus_data data;
205
206 data.byte = val;
207
208 return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
209 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
210 &data);
211}
212
213static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
214 u8 val)
215{
216 int ret;
217 u8 status;
218
219 ret = sii902x_read_unlocked(i2c, reg, &status);
220 if (ret)
221 return ret;
222 status &= ~mask;
223 status |= val & mask;
224 return sii902x_write_unlocked(i2c, reg, status);
225}
226
227static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
228{
229 return container_of(bridge, struct sii902x, bridge);
230}
231
232static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
233{
234 return container_of(con, struct sii902x, connector);
235}
236
237static void sii902x_reset(struct sii902x *sii902x)
238{
239 if (!sii902x->reset_gpio)
240 return;
241
242 gpiod_set_value_cansleep(sii902x->reset_gpio, 1);
243
244 /* The datasheet says treset-min = 100us. Make it 150us to be sure. */
245 usleep_range(150, 200);
246
247 gpiod_set_value_cansleep(sii902x->reset_gpio, 0);
248}
249
250static enum drm_connector_status sii902x_detect(struct sii902x *sii902x)
251{
252 unsigned int status;
253
254 mutex_lock(&sii902x->mutex);
255
256 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
257
258 mutex_unlock(&sii902x->mutex);
259
260 return (status & SII902X_PLUGGED_STATUS) ?
261 connector_status_connected : connector_status_disconnected;
262}
263
264static enum drm_connector_status
265sii902x_connector_detect(struct drm_connector *connector, bool force)
266{
267 struct sii902x *sii902x = connector_to_sii902x(connector);
268
269 return sii902x_detect(sii902x);
270}
271
272static const struct drm_connector_funcs sii902x_connector_funcs = {
273 .detect = sii902x_connector_detect,
274 .fill_modes = drm_helper_probe_single_connector_modes,
275 .destroy = drm_connector_cleanup,
276 .reset = drm_atomic_helper_connector_reset,
277 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
278 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
279};
280
281static struct edid *sii902x_get_edid(struct sii902x *sii902x,
282 struct drm_connector *connector)
283{
284 struct edid *edid;
285
286 mutex_lock(&sii902x->mutex);
287
288 edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
289 if (edid) {
290 if (drm_detect_hdmi_monitor(edid))
291 sii902x->sink_is_hdmi = true;
292 else
293 sii902x->sink_is_hdmi = false;
294 }
295
296 mutex_unlock(&sii902x->mutex);
297
298 return edid;
299}
300
301static int sii902x_get_modes(struct drm_connector *connector)
302{
303 struct sii902x *sii902x = connector_to_sii902x(connector);
304 struct edid *edid;
305 int num = 0;
306
307 edid = sii902x_get_edid(sii902x, connector);
308 drm_connector_update_edid_property(connector, edid);
309 if (edid) {
310 num = drm_add_edid_modes(connector, edid);
311 kfree(edid);
312 }
313
314 return num;
315}
316
317static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
318 struct drm_display_mode *mode)
319{
320 /* TODO: check mode */
321
322 return MODE_OK;
323}
324
325static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
326 .get_modes = sii902x_get_modes,
327 .mode_valid = sii902x_mode_valid,
328};
329
330static void sii902x_bridge_disable(struct drm_bridge *bridge)
331{
332 struct sii902x *sii902x = bridge_to_sii902x(bridge);
333
334 mutex_lock(&sii902x->mutex);
335
336 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
337 SII902X_SYS_CTRL_PWR_DWN,
338 SII902X_SYS_CTRL_PWR_DWN);
339
340 mutex_unlock(&sii902x->mutex);
341}
342
343static void sii902x_bridge_enable(struct drm_bridge *bridge)
344{
345 struct sii902x *sii902x = bridge_to_sii902x(bridge);
346
347 mutex_lock(&sii902x->mutex);
348
349 regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
350 SII902X_AVI_POWER_STATE_MSK,
351 SII902X_AVI_POWER_STATE_D(0));
352 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
353 SII902X_SYS_CTRL_PWR_DWN, 0);
354
355 mutex_unlock(&sii902x->mutex);
356}
357
358static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
359 const struct drm_display_mode *mode,
360 const struct drm_display_mode *adj)
361{
362 struct sii902x *sii902x = bridge_to_sii902x(bridge);
363 u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
364 struct regmap *regmap = sii902x->regmap;
365 u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
366 struct hdmi_avi_infoframe frame;
367 u16 pixel_clock_10kHz = adj->clock / 10;
368 int ret;
369
370 if (sii902x->sink_is_hdmi)
371 output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
372
373 buf[0] = pixel_clock_10kHz & 0xff;
374 buf[1] = pixel_clock_10kHz >> 8;
375 buf[2] = drm_mode_vrefresh(adj);
376 buf[3] = 0x00;
377 buf[4] = adj->hdisplay;
378 buf[5] = adj->hdisplay >> 8;
379 buf[6] = adj->vdisplay;
380 buf[7] = adj->vdisplay >> 8;
381 buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
382 SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
383 buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
384 SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
385
386 mutex_lock(&sii902x->mutex);
387
388 ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
389 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
390 if (ret)
391 goto out;
392
393 ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
394 if (ret)
395 goto out;
396
397 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
398 &sii902x->connector, adj);
399 if (ret < 0) {
400 DRM_ERROR("couldn't fill AVI infoframe\n");
401 goto out;
402 }
403
404 ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
405 if (ret < 0) {
406 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
407 goto out;
408 }
409
410 /* Do not send the infoframe header, but keep the CRC field. */
411 regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
412 buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
413 HDMI_AVI_INFOFRAME_SIZE + 1);
414
415out:
416 mutex_unlock(&sii902x->mutex);
417}
418
419static int sii902x_bridge_attach(struct drm_bridge *bridge,
420 enum drm_bridge_attach_flags flags)
421{
422 struct sii902x *sii902x = bridge_to_sii902x(bridge);
423 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
424 struct drm_device *drm = bridge->dev;
425 int ret;
426
427 if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
428 return drm_bridge_attach(bridge->encoder, sii902x->next_bridge,
429 bridge, flags);
430
431 drm_connector_helper_add(&sii902x->connector,
432 &sii902x_connector_helper_funcs);
433
434 if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
435 dev_err(&sii902x->i2c->dev,
436 "sii902x driver is only compatible with DRM devices supporting atomic updates\n");
437 return -ENOTSUPP;
438 }
439
440 ret = drm_connector_init(drm, &sii902x->connector,
441 &sii902x_connector_funcs,
442 DRM_MODE_CONNECTOR_HDMIA);
443 if (ret)
444 return ret;
445
446 if (sii902x->i2c->irq > 0)
447 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
448 else
449 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
450
451 ret = drm_display_info_set_bus_formats(&sii902x->connector.display_info,
452 &bus_format, 1);
453 if (ret)
454 return ret;
455
456 drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
457
458 return 0;
459}
460
461static enum drm_connector_status sii902x_bridge_detect(struct drm_bridge *bridge)
462{
463 struct sii902x *sii902x = bridge_to_sii902x(bridge);
464
465 return sii902x_detect(sii902x);
466}
467
468static struct edid *sii902x_bridge_get_edid(struct drm_bridge *bridge,
469 struct drm_connector *connector)
470{
471 struct sii902x *sii902x = bridge_to_sii902x(bridge);
472
473 return sii902x_get_edid(sii902x, connector);
474}
475
476static u32 *sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
477 struct drm_bridge_state *bridge_state,
478 struct drm_crtc_state *crtc_state,
479 struct drm_connector_state *conn_state,
480 u32 output_fmt,
481 unsigned int *num_input_fmts)
482{
483 u32 *input_fmts;
484
485 *num_input_fmts = 0;
486
487 input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL);
488 if (!input_fmts)
489 return NULL;
490
491 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
492 *num_input_fmts = 1;
493
494 return input_fmts;
495}
496
497static int sii902x_bridge_atomic_check(struct drm_bridge *bridge,
498 struct drm_bridge_state *bridge_state,
499 struct drm_crtc_state *crtc_state,
500 struct drm_connector_state *conn_state)
501{
502 /*
503 * There might be flags negotiation supported in future but
504 * set the bus flags in atomic_check statically for now.
505 */
506 bridge_state->input_bus_cfg.flags = bridge->timings->input_bus_flags;
507
508 return 0;
509}
510
511static const struct drm_bridge_funcs sii902x_bridge_funcs = {
512 .attach = sii902x_bridge_attach,
513 .mode_set = sii902x_bridge_mode_set,
514 .disable = sii902x_bridge_disable,
515 .enable = sii902x_bridge_enable,
516 .detect = sii902x_bridge_detect,
517 .get_edid = sii902x_bridge_get_edid,
518 .atomic_reset = drm_atomic_helper_bridge_reset,
519 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
520 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
521 .atomic_get_input_bus_fmts = sii902x_bridge_atomic_get_input_bus_fmts,
522 .atomic_check = sii902x_bridge_atomic_check,
523};
524
525static int sii902x_mute(struct sii902x *sii902x, bool mute)
526{
527 struct device *dev = &sii902x->i2c->dev;
528 unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
529 SII902X_TPI_AUDIO_MUTE_DISABLE;
530
531 dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
532
533 return regmap_update_bits(sii902x->regmap,
534 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
535 SII902X_TPI_AUDIO_MUTE_ENABLE, val);
536}
537
538static const int sii902x_mclk_div_table[] = {
539 128, 256, 384, 512, 768, 1024, 1152, 192 };
540
541static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
542 unsigned int mclk)
543{
544 int div = mclk / rate;
545 int distance = 100000;
546 u8 i, nearest = 0;
547
548 for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
549 unsigned int d = abs(div - sii902x_mclk_div_table[i]);
550
551 if (d >= distance)
552 continue;
553
554 nearest = i;
555 distance = d;
556 if (d == 0)
557 break;
558 }
559
560 *i2s_config_reg |= nearest << 4;
561
562 return sii902x_mclk_div_table[nearest];
563}
564
565static const struct sii902x_sample_freq {
566 u32 freq;
567 u8 val;
568} sii902x_sample_freq[] = {
569 { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ },
570 { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ },
571 { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ },
572 { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ },
573 { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ },
574 { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ },
575 { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ },
576};
577
578static int sii902x_audio_hw_params(struct device *dev, void *data,
579 struct hdmi_codec_daifmt *daifmt,
580 struct hdmi_codec_params *params)
581{
582 struct sii902x *sii902x = dev_get_drvdata(dev);
583 u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
584 u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
585 SII902X_TPI_AUDIO_MUTE_ENABLE |
586 SII902X_TPI_AUDIO_CODING_PCM);
587 u8 config_byte3_reg = 0;
588 u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
589 unsigned long mclk_rate;
590 int i, ret;
591
592 if (daifmt->bit_clk_provider || daifmt->frame_clk_provider) {
593 dev_dbg(dev, "%s: I2S clock provider mode not supported\n",
594 __func__);
595 return -EINVAL;
596 }
597
598 switch (daifmt->fmt) {
599 case HDMI_I2S:
600 i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
601 SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
602 break;
603 case HDMI_RIGHT_J:
604 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
605 break;
606 case HDMI_LEFT_J:
607 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
608 break;
609 default:
610 dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
611 daifmt->fmt);
612 return -EINVAL;
613 }
614
615 if (daifmt->bit_clk_inv)
616 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
617 else
618 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
619
620 if (daifmt->frame_clk_inv)
621 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
622 else
623 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
624
625 if (params->channels > 2)
626 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
627 else
628 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
629
630 switch (params->sample_width) {
631 case 16:
632 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
633 break;
634 case 20:
635 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
636 break;
637 case 24:
638 case 32:
639 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
640 break;
641 default:
642 dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
643 params->sample_width);
644 return -EINVAL;
645 }
646
647 for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
648 if (params->sample_rate == sii902x_sample_freq[i].freq) {
649 config_byte3_reg |= sii902x_sample_freq[i].val;
650 break;
651 }
652 }
653
654 ret = clk_prepare_enable(sii902x->audio.mclk);
655 if (ret) {
656 dev_err(dev, "Enabling mclk failed: %d\n", ret);
657 return ret;
658 }
659
660 if (sii902x->audio.mclk) {
661 mclk_rate = clk_get_rate(sii902x->audio.mclk);
662 ret = sii902x_select_mclk_div(&i2s_config_reg,
663 params->sample_rate, mclk_rate);
664 if (mclk_rate != ret * params->sample_rate)
665 dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
666 mclk_rate, ret, params->sample_rate);
667 }
668
669 mutex_lock(&sii902x->mutex);
670
671 ret = regmap_write(sii902x->regmap,
672 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
673 config_byte2_reg);
674 if (ret < 0)
675 goto out;
676
677 ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
678 i2s_config_reg);
679 if (ret)
680 goto out;
681
682 for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) &&
683 sii902x->audio.i2s_fifo_sequence[i]; i++)
684 regmap_write(sii902x->regmap,
685 SII902X_TPI_I2S_ENABLE_MAPPING_REG,
686 sii902x->audio.i2s_fifo_sequence[i]);
687
688 ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
689 config_byte3_reg);
690 if (ret)
691 goto out;
692
693 ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
694 params->iec.status,
695 min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
696 sizeof(params->iec.status)));
697 if (ret)
698 goto out;
699
700 ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf,
701 sizeof(infoframe_buf));
702 if (ret < 0) {
703 dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
704 __func__, ret);
705 goto out;
706 }
707
708 ret = regmap_bulk_write(sii902x->regmap,
709 SII902X_TPI_MISC_INFOFRAME_BASE,
710 infoframe_buf,
711 min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
712 if (ret)
713 goto out;
714
715 /* Decode Level 0 Packets */
716 ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
717 if (ret)
718 goto out;
719
720 ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
721 if (ret)
722 goto out;
723
724 ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
725 if (ret)
726 goto out;
727
728 dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
729out:
730 mutex_unlock(&sii902x->mutex);
731
732 if (ret) {
733 clk_disable_unprepare(sii902x->audio.mclk);
734 dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
735 ret);
736 }
737
738 return ret;
739}
740
741static void sii902x_audio_shutdown(struct device *dev, void *data)
742{
743 struct sii902x *sii902x = dev_get_drvdata(dev);
744
745 mutex_lock(&sii902x->mutex);
746
747 regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
748 SII902X_TPI_AUDIO_INTERFACE_DISABLE);
749
750 mutex_unlock(&sii902x->mutex);
751
752 clk_disable_unprepare(sii902x->audio.mclk);
753}
754
755static int sii902x_audio_mute(struct device *dev, void *data,
756 bool enable, int direction)
757{
758 struct sii902x *sii902x = dev_get_drvdata(dev);
759
760 mutex_lock(&sii902x->mutex);
761
762 sii902x_mute(sii902x, enable);
763
764 mutex_unlock(&sii902x->mutex);
765
766 return 0;
767}
768
769static int sii902x_audio_get_eld(struct device *dev, void *data,
770 uint8_t *buf, size_t len)
771{
772 struct sii902x *sii902x = dev_get_drvdata(dev);
773
774 mutex_lock(&sii902x->mutex);
775
776 memcpy(buf, sii902x->connector.eld,
777 min(sizeof(sii902x->connector.eld), len));
778
779 mutex_unlock(&sii902x->mutex);
780
781 return 0;
782}
783
784static int sii902x_audio_get_dai_id(struct snd_soc_component *component,
785 struct device_node *endpoint)
786{
787 struct of_endpoint of_ep;
788 int ret;
789
790 ret = of_graph_parse_endpoint(endpoint, &of_ep);
791 if (ret < 0)
792 return ret;
793
794 /*
795 * HDMI sound should be located at reg = <3>
796 * Return expected DAI index 0.
797 */
798 if (of_ep.port == SII902X_AUDIO_PORT_INDEX)
799 return 0;
800
801 return -EINVAL;
802}
803
804static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
805 .hw_params = sii902x_audio_hw_params,
806 .audio_shutdown = sii902x_audio_shutdown,
807 .mute_stream = sii902x_audio_mute,
808 .get_eld = sii902x_audio_get_eld,
809 .get_dai_id = sii902x_audio_get_dai_id,
810 .no_capture_mute = 1,
811};
812
813static int sii902x_audio_codec_init(struct sii902x *sii902x,
814 struct device *dev)
815{
816 static const u8 audio_fifo_id[] = {
817 SII902X_TPI_I2S_CONFIG_FIFO0,
818 SII902X_TPI_I2S_CONFIG_FIFO1,
819 SII902X_TPI_I2S_CONFIG_FIFO2,
820 SII902X_TPI_I2S_CONFIG_FIFO3,
821 };
822 static const u8 i2s_lane_id[] = {
823 SII902X_TPI_I2S_SELECT_SD0,
824 SII902X_TPI_I2S_SELECT_SD1,
825 SII902X_TPI_I2S_SELECT_SD2,
826 SII902X_TPI_I2S_SELECT_SD3,
827 };
828 struct hdmi_codec_pdata codec_data = {
829 .ops = &sii902x_audio_codec_ops,
830 .i2s = 1, /* Only i2s support for now. */
831 .spdif = 0,
832 .max_i2s_channels = 0,
833 };
834 u8 lanes[4];
835 int num_lanes, i;
836
837 if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
838 dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
839 __func__);
840 return 0;
841 }
842
843 num_lanes = of_property_read_variable_u8_array(dev->of_node,
844 "sil,i2s-data-lanes",
845 lanes, 1,
846 ARRAY_SIZE(lanes));
847
848 if (num_lanes == -EINVAL) {
849 dev_dbg(dev,
850 "%s: No \"sil,i2s-data-lanes\", use default <0>\n",
851 __func__);
852 num_lanes = 1;
853 lanes[0] = 0;
854 } else if (num_lanes < 0) {
855 dev_err(dev,
856 "%s: Error gettin \"sil,i2s-data-lanes\": %d\n",
857 __func__, num_lanes);
858 return num_lanes;
859 }
860 codec_data.max_i2s_channels = 2 * num_lanes;
861
862 for (i = 0; i < num_lanes; i++)
863 sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |
864 i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE;
865
866 sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk");
867 if (IS_ERR(sii902x->audio.mclk)) {
868 dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
869 __func__, PTR_ERR(sii902x->audio.mclk));
870 return PTR_ERR(sii902x->audio.mclk);
871 }
872
873 sii902x->audio.pdev = platform_device_register_data(
874 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
875 &codec_data, sizeof(codec_data));
876
877 return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
878}
879
880static const struct regmap_range sii902x_volatile_ranges[] = {
881 { .range_min = 0, .range_max = 0xff },
882};
883
884static const struct regmap_access_table sii902x_volatile_table = {
885 .yes_ranges = sii902x_volatile_ranges,
886 .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
887};
888
889static const struct regmap_config sii902x_regmap_config = {
890 .reg_bits = 8,
891 .val_bits = 8,
892 .disable_locking = true, /* struct sii902x mutex should be enough */
893 .max_register = SII902X_TPI_MISC_INFOFRAME_END,
894 .volatile_table = &sii902x_volatile_table,
895 .cache_type = REGCACHE_NONE,
896};
897
898static irqreturn_t sii902x_interrupt(int irq, void *data)
899{
900 struct sii902x *sii902x = data;
901 unsigned int status = 0;
902
903 mutex_lock(&sii902x->mutex);
904
905 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
906 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
907
908 mutex_unlock(&sii902x->mutex);
909
910 if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev) {
911 drm_helper_hpd_irq_event(sii902x->bridge.dev);
912 drm_bridge_hpd_notify(&sii902x->bridge, (status & SII902X_PLUGGED_STATUS)
913 ? connector_status_connected
914 : connector_status_disconnected);
915 }
916
917 return IRQ_HANDLED;
918}
919
920/*
921 * The purpose of sii902x_i2c_bypass_select is to enable the pass through
922 * mode of the HDMI transmitter. Do not use regmap from within this function,
923 * only use sii902x_*_unlocked functions to read/modify/write registers.
924 * We are holding the parent adapter lock here, keep this in mind before
925 * adding more i2c transactions.
926 *
927 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
928 * in this driver, we need to make sure that we only touch 0x1A[2:1] from
929 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
930 * we leave the remaining bits as we have found them.
931 */
932static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
933{
934 struct sii902x *sii902x = i2c_mux_priv(mux);
935 struct device *dev = &sii902x->i2c->dev;
936 unsigned long timeout;
937 u8 status;
938 int ret;
939
940 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
941 SII902X_SYS_CTRL_DDC_BUS_REQ,
942 SII902X_SYS_CTRL_DDC_BUS_REQ);
943 if (ret)
944 return ret;
945
946 timeout = jiffies +
947 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
948 do {
949 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
950 &status);
951 if (ret)
952 return ret;
953 } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
954 time_before(jiffies, timeout));
955
956 if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
957 dev_err(dev, "Failed to acquire the i2c bus\n");
958 return -ETIMEDOUT;
959 }
960
961 return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
962 status);
963}
964
965/*
966 * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
967 * mode of the HDMI transmitter. Do not use regmap from within this function,
968 * only use sii902x_*_unlocked functions to read/modify/write registers.
969 * We are holding the parent adapter lock here, keep this in mind before
970 * adding more i2c transactions.
971 *
972 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
973 * in this driver, we need to make sure that we only touch 0x1A[2:1] from
974 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
975 * we leave the remaining bits as we have found them.
976 */
977static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
978{
979 struct sii902x *sii902x = i2c_mux_priv(mux);
980 struct device *dev = &sii902x->i2c->dev;
981 unsigned long timeout;
982 unsigned int retries;
983 u8 status;
984 int ret;
985
986 /*
987 * When the HDMI transmitter is in pass through mode, we need an
988 * (undocumented) additional delay between STOP and START conditions
989 * to guarantee the bus won't get stuck.
990 */
991 udelay(30);
992
993 /*
994 * Sometimes the I2C bus can stall after failure to use the
995 * EDID channel. Retry a few times to see if things clear
996 * up, else continue anyway.
997 */
998 retries = 5;
999 do {
1000 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
1001 &status);
1002 retries--;
1003 } while (ret && retries);
1004 if (ret) {
1005 dev_err(dev, "failed to read status (%d)\n", ret);
1006 return ret;
1007 }
1008
1009 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
1010 SII902X_SYS_CTRL_DDC_BUS_REQ |
1011 SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
1012 if (ret)
1013 return ret;
1014
1015 timeout = jiffies +
1016 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
1017 do {
1018 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
1019 &status);
1020 if (ret)
1021 return ret;
1022 } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
1023 SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
1024 time_before(jiffies, timeout));
1025
1026 if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
1027 SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
1028 dev_err(dev, "failed to release the i2c bus\n");
1029 return -ETIMEDOUT;
1030 }
1031
1032 return 0;
1033}
1034
1035static const struct drm_bridge_timings default_sii902x_timings = {
1036 .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
1037 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
1038 | DRM_BUS_FLAG_DE_HIGH,
1039};
1040
1041static int sii902x_init(struct sii902x *sii902x)
1042{
1043 struct device *dev = &sii902x->i2c->dev;
1044 unsigned int status = 0;
1045 u8 chipid[4];
1046 int ret;
1047
1048 sii902x_reset(sii902x);
1049
1050 ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
1051 if (ret)
1052 return ret;
1053
1054 ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
1055 &chipid, 4);
1056 if (ret) {
1057 dev_err(dev, "regmap_read failed %d\n", ret);
1058 return ret;
1059 }
1060
1061 if (chipid[0] != 0xb0) {
1062 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
1063 chipid[0]);
1064 return -EINVAL;
1065 }
1066
1067 /* Clear all pending interrupts */
1068 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
1069 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
1070
1071 if (sii902x->i2c->irq > 0) {
1072 regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
1073 SII902X_HOTPLUG_EVENT);
1074
1075 ret = devm_request_threaded_irq(dev, sii902x->i2c->irq, NULL,
1076 sii902x_interrupt,
1077 IRQF_ONESHOT, dev_name(dev),
1078 sii902x);
1079 if (ret)
1080 return ret;
1081 }
1082
1083 ret = sii902x_audio_codec_init(sii902x, dev);
1084 if (ret)
1085 return ret;
1086
1087 i2c_set_clientdata(sii902x->i2c, sii902x);
1088
1089 sii902x->i2cmux = i2c_mux_alloc(sii902x->i2c->adapter, dev,
1090 1, 0, I2C_MUX_GATE,
1091 sii902x_i2c_bypass_select,
1092 sii902x_i2c_bypass_deselect);
1093 if (!sii902x->i2cmux) {
1094 ret = -ENOMEM;
1095 goto err_unreg_audio;
1096 }
1097
1098 sii902x->i2cmux->priv = sii902x;
1099 ret = i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
1100 if (ret)
1101 goto err_unreg_audio;
1102
1103 sii902x->bridge.funcs = &sii902x_bridge_funcs;
1104 sii902x->bridge.of_node = dev->of_node;
1105 sii902x->bridge.timings = &default_sii902x_timings;
1106 sii902x->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
1107
1108 if (sii902x->i2c->irq > 0)
1109 sii902x->bridge.ops |= DRM_BRIDGE_OP_HPD;
1110
1111 drm_bridge_add(&sii902x->bridge);
1112
1113 return 0;
1114
1115err_unreg_audio:
1116 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev))
1117 platform_device_unregister(sii902x->audio.pdev);
1118
1119 return ret;
1120}
1121
1122static int sii902x_probe(struct i2c_client *client)
1123{
1124 struct device *dev = &client->dev;
1125 struct device_node *endpoint;
1126 struct sii902x *sii902x;
1127 static const char * const supplies[] = {"iovcc", "cvcc12"};
1128 int ret;
1129
1130 ret = i2c_check_functionality(client->adapter,
1131 I2C_FUNC_SMBUS_BYTE_DATA);
1132 if (!ret) {
1133 dev_err(dev, "I2C adapter not suitable\n");
1134 return -EIO;
1135 }
1136
1137 sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
1138 if (!sii902x)
1139 return -ENOMEM;
1140
1141 sii902x->i2c = client;
1142 sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
1143 if (IS_ERR(sii902x->regmap))
1144 return PTR_ERR(sii902x->regmap);
1145
1146 sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
1147 GPIOD_OUT_LOW);
1148 if (IS_ERR(sii902x->reset_gpio)) {
1149 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
1150 PTR_ERR(sii902x->reset_gpio));
1151 return PTR_ERR(sii902x->reset_gpio);
1152 }
1153
1154 endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1);
1155 if (endpoint) {
1156 struct device_node *remote = of_graph_get_remote_port_parent(endpoint);
1157
1158 of_node_put(endpoint);
1159 if (!remote) {
1160 dev_err(dev, "Endpoint in port@1 unconnected\n");
1161 return -ENODEV;
1162 }
1163
1164 if (!of_device_is_available(remote)) {
1165 dev_err(dev, "port@1 remote device is disabled\n");
1166 of_node_put(remote);
1167 return -ENODEV;
1168 }
1169
1170 sii902x->next_bridge = of_drm_find_bridge(remote);
1171 of_node_put(remote);
1172 if (!sii902x->next_bridge)
1173 return dev_err_probe(dev, -EPROBE_DEFER,
1174 "Failed to find remote bridge\n");
1175 }
1176
1177 mutex_init(&sii902x->mutex);
1178
1179 ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(supplies), supplies);
1180 if (ret < 0)
1181 return dev_err_probe(dev, ret, "Failed to enable supplies");
1182
1183 return sii902x_init(sii902x);
1184}
1185
1186static void sii902x_remove(struct i2c_client *client)
1187{
1188 struct sii902x *sii902x = i2c_get_clientdata(client);
1189
1190 drm_bridge_remove(&sii902x->bridge);
1191 i2c_mux_del_adapters(sii902x->i2cmux);
1192
1193 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev))
1194 platform_device_unregister(sii902x->audio.pdev);
1195}
1196
1197static const struct of_device_id sii902x_dt_ids[] = {
1198 { .compatible = "sil,sii9022", },
1199 { }
1200};
1201MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
1202
1203static const struct i2c_device_id sii902x_i2c_ids[] = {
1204 { "sii9022", 0 },
1205 { },
1206};
1207MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
1208
1209static struct i2c_driver sii902x_driver = {
1210 .probe = sii902x_probe,
1211 .remove = sii902x_remove,
1212 .driver = {
1213 .name = "sii902x",
1214 .of_match_table = sii902x_dt_ids,
1215 },
1216 .id_table = sii902x_i2c_ids,
1217};
1218module_i2c_driver(sii902x_driver);
1219
1220MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
1221MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
1222MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2018 Renesas Electronics
4 *
5 * Copyright (C) 2016 Atmel
6 * Bo Shen <voice.shen@atmel.com>
7 *
8 * Authors: Bo Shen <voice.shen@atmel.com>
9 * Boris Brezillon <boris.brezillon@free-electrons.com>
10 * Wu, Songjun <Songjun.Wu@atmel.com>
11 *
12 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
13 */
14
15#include <linux/gpio/consumer.h>
16#include <linux/i2c-mux.h>
17#include <linux/i2c.h>
18#include <linux/module.h>
19#include <linux/regmap.h>
20#include <linux/clk.h>
21
22#include <drm/drm_atomic_helper.h>
23#include <drm/drm_drv.h>
24#include <drm/drm_edid.h>
25#include <drm/drm_print.h>
26#include <drm/drm_probe_helper.h>
27
28#include <sound/hdmi-codec.h>
29
30#define SII902X_TPI_VIDEO_DATA 0x0
31
32#define SII902X_TPI_PIXEL_REPETITION 0x8
33#define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT BIT(5)
34#define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE BIT(4)
35#define SII902X_TPI_AVI_PIXEL_REP_4X 3
36#define SII902X_TPI_AVI_PIXEL_REP_2X 1
37#define SII902X_TPI_AVI_PIXEL_REP_NONE 0
38#define SII902X_TPI_CLK_RATIO_HALF (0 << 6)
39#define SII902X_TPI_CLK_RATIO_1X (1 << 6)
40#define SII902X_TPI_CLK_RATIO_2X (2 << 6)
41#define SII902X_TPI_CLK_RATIO_4X (3 << 6)
42
43#define SII902X_TPI_AVI_IN_FORMAT 0x9
44#define SII902X_TPI_AVI_INPUT_BITMODE_12BIT BIT(7)
45#define SII902X_TPI_AVI_INPUT_DITHER BIT(6)
46#define SII902X_TPI_AVI_INPUT_RANGE_LIMITED (2 << 2)
47#define SII902X_TPI_AVI_INPUT_RANGE_FULL (1 << 2)
48#define SII902X_TPI_AVI_INPUT_RANGE_AUTO (0 << 2)
49#define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK (3 << 0)
50#define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0)
51#define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0)
52#define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB (0 << 0)
53
54#define SII902X_TPI_AVI_INFOFRAME 0x0c
55
56#define SII902X_SYS_CTRL_DATA 0x1a
57#define SII902X_SYS_CTRL_PWR_DWN BIT(4)
58#define SII902X_SYS_CTRL_AV_MUTE BIT(3)
59#define SII902X_SYS_CTRL_DDC_BUS_REQ BIT(2)
60#define SII902X_SYS_CTRL_DDC_BUS_GRTD BIT(1)
61#define SII902X_SYS_CTRL_OUTPUT_MODE BIT(0)
62#define SII902X_SYS_CTRL_OUTPUT_HDMI 1
63#define SII902X_SYS_CTRL_OUTPUT_DVI 0
64
65#define SII902X_REG_CHIPID(n) (0x1b + (n))
66
67#define SII902X_PWR_STATE_CTRL 0x1e
68#define SII902X_AVI_POWER_STATE_MSK GENMASK(1, 0)
69#define SII902X_AVI_POWER_STATE_D(l) ((l) & SII902X_AVI_POWER_STATE_MSK)
70
71/* Audio */
72#define SII902X_TPI_I2S_ENABLE_MAPPING_REG 0x1f
73#define SII902X_TPI_I2S_CONFIG_FIFO0 (0 << 0)
74#define SII902X_TPI_I2S_CONFIG_FIFO1 (1 << 0)
75#define SII902X_TPI_I2S_CONFIG_FIFO2 (2 << 0)
76#define SII902X_TPI_I2S_CONFIG_FIFO3 (3 << 0)
77#define SII902X_TPI_I2S_LEFT_RIGHT_SWAP (1 << 2)
78#define SII902X_TPI_I2S_AUTO_DOWNSAMPLE (1 << 3)
79#define SII902X_TPI_I2S_SELECT_SD0 (0 << 4)
80#define SII902X_TPI_I2S_SELECT_SD1 (1 << 4)
81#define SII902X_TPI_I2S_SELECT_SD2 (2 << 4)
82#define SII902X_TPI_I2S_SELECT_SD3 (3 << 4)
83#define SII902X_TPI_I2S_FIFO_ENABLE (1 << 7)
84
85#define SII902X_TPI_I2S_INPUT_CONFIG_REG 0x20
86#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES (0 << 0)
87#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO (1 << 0)
88#define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST (0 << 1)
89#define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST (1 << 1)
90#define SII902X_TPI_I2S_SD_JUSTIFY_LEFT (0 << 2)
91#define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT (1 << 2)
92#define SII902X_TPI_I2S_WS_POLARITY_LOW (0 << 3)
93#define SII902X_TPI_I2S_WS_POLARITY_HIGH (1 << 3)
94#define SII902X_TPI_I2S_MCLK_MULTIPLIER_128 (0 << 4)
95#define SII902X_TPI_I2S_MCLK_MULTIPLIER_256 (1 << 4)
96#define SII902X_TPI_I2S_MCLK_MULTIPLIER_384 (2 << 4)
97#define SII902X_TPI_I2S_MCLK_MULTIPLIER_512 (3 << 4)
98#define SII902X_TPI_I2S_MCLK_MULTIPLIER_768 (4 << 4)
99#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024 (5 << 4)
100#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152 (6 << 4)
101#define SII902X_TPI_I2S_MCLK_MULTIPLIER_192 (7 << 4)
102#define SII902X_TPI_I2S_SCK_EDGE_FALLING (0 << 7)
103#define SII902X_TPI_I2S_SCK_EDGE_RISING (1 << 7)
104
105#define SII902X_TPI_I2S_STRM_HDR_BASE 0x21
106#define SII902X_TPI_I2S_STRM_HDR_SIZE 5
107
108#define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG 0x26
109#define SII902X_TPI_AUDIO_CODING_STREAM_HEADER (0 << 0)
110#define SII902X_TPI_AUDIO_CODING_PCM (1 << 0)
111#define SII902X_TPI_AUDIO_CODING_AC3 (2 << 0)
112#define SII902X_TPI_AUDIO_CODING_MPEG1 (3 << 0)
113#define SII902X_TPI_AUDIO_CODING_MP3 (4 << 0)
114#define SII902X_TPI_AUDIO_CODING_MPEG2 (5 << 0)
115#define SII902X_TPI_AUDIO_CODING_AAC (6 << 0)
116#define SII902X_TPI_AUDIO_CODING_DTS (7 << 0)
117#define SII902X_TPI_AUDIO_CODING_ATRAC (8 << 0)
118#define SII902X_TPI_AUDIO_MUTE_DISABLE (0 << 4)
119#define SII902X_TPI_AUDIO_MUTE_ENABLE (1 << 4)
120#define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS (0 << 5)
121#define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS (1 << 5)
122#define SII902X_TPI_AUDIO_INTERFACE_DISABLE (0 << 6)
123#define SII902X_TPI_AUDIO_INTERFACE_SPDIF (1 << 6)
124#define SII902X_TPI_AUDIO_INTERFACE_I2S (2 << 6)
125
126#define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG 0x27
127#define SII902X_TPI_AUDIO_FREQ_STREAM (0 << 3)
128#define SII902X_TPI_AUDIO_FREQ_32KHZ (1 << 3)
129#define SII902X_TPI_AUDIO_FREQ_44KHZ (2 << 3)
130#define SII902X_TPI_AUDIO_FREQ_48KHZ (3 << 3)
131#define SII902X_TPI_AUDIO_FREQ_88KHZ (4 << 3)
132#define SII902X_TPI_AUDIO_FREQ_96KHZ (5 << 3)
133#define SII902X_TPI_AUDIO_FREQ_176KHZ (6 << 3)
134#define SII902X_TPI_AUDIO_FREQ_192KHZ (7 << 3)
135#define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM (0 << 6)
136#define SII902X_TPI_AUDIO_SAMPLE_SIZE_16 (1 << 6)
137#define SII902X_TPI_AUDIO_SAMPLE_SIZE_20 (2 << 6)
138#define SII902X_TPI_AUDIO_SAMPLE_SIZE_24 (3 << 6)
139
140#define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG 0x28
141
142#define SII902X_INT_ENABLE 0x3c
143#define SII902X_INT_STATUS 0x3d
144#define SII902X_HOTPLUG_EVENT BIT(0)
145#define SII902X_PLUGGED_STATUS BIT(2)
146
147#define SII902X_REG_TPI_RQB 0xc7
148
149/* Indirect internal register access */
150#define SII902X_IND_SET_PAGE 0xbc
151#define SII902X_IND_OFFSET 0xbd
152#define SII902X_IND_VALUE 0xbe
153
154#define SII902X_TPI_MISC_INFOFRAME_BASE 0xbf
155#define SII902X_TPI_MISC_INFOFRAME_END 0xde
156#define SII902X_TPI_MISC_INFOFRAME_SIZE \
157 (SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
158
159#define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500
160
161#define SII902X_AUDIO_PORT_INDEX 3
162
163struct sii902x {
164 struct i2c_client *i2c;
165 struct regmap *regmap;
166 struct drm_bridge bridge;
167 struct drm_connector connector;
168 struct gpio_desc *reset_gpio;
169 struct i2c_mux_core *i2cmux;
170 /*
171 * Mutex protects audio and video functions from interfering
172 * each other, by keeping their i2c command sequences atomic.
173 */
174 struct mutex mutex;
175 struct sii902x_audio {
176 struct platform_device *pdev;
177 struct clk *mclk;
178 u32 i2s_fifo_sequence[4];
179 } audio;
180};
181
182static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
183{
184 union i2c_smbus_data data;
185 int ret;
186
187 ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
188 I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
189
190 if (ret < 0)
191 return ret;
192
193 *val = data.byte;
194 return 0;
195}
196
197static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
198{
199 union i2c_smbus_data data;
200
201 data.byte = val;
202
203 return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
204 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
205 &data);
206}
207
208static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
209 u8 val)
210{
211 int ret;
212 u8 status;
213
214 ret = sii902x_read_unlocked(i2c, reg, &status);
215 if (ret)
216 return ret;
217 status &= ~mask;
218 status |= val & mask;
219 return sii902x_write_unlocked(i2c, reg, status);
220}
221
222static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
223{
224 return container_of(bridge, struct sii902x, bridge);
225}
226
227static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
228{
229 return container_of(con, struct sii902x, connector);
230}
231
232static void sii902x_reset(struct sii902x *sii902x)
233{
234 if (!sii902x->reset_gpio)
235 return;
236
237 gpiod_set_value(sii902x->reset_gpio, 1);
238
239 /* The datasheet says treset-min = 100us. Make it 150us to be sure. */
240 usleep_range(150, 200);
241
242 gpiod_set_value(sii902x->reset_gpio, 0);
243}
244
245static enum drm_connector_status
246sii902x_connector_detect(struct drm_connector *connector, bool force)
247{
248 struct sii902x *sii902x = connector_to_sii902x(connector);
249 unsigned int status;
250
251 mutex_lock(&sii902x->mutex);
252
253 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
254
255 mutex_unlock(&sii902x->mutex);
256
257 return (status & SII902X_PLUGGED_STATUS) ?
258 connector_status_connected : connector_status_disconnected;
259}
260
261static const struct drm_connector_funcs sii902x_connector_funcs = {
262 .detect = sii902x_connector_detect,
263 .fill_modes = drm_helper_probe_single_connector_modes,
264 .destroy = drm_connector_cleanup,
265 .reset = drm_atomic_helper_connector_reset,
266 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
267 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
268};
269
270static int sii902x_get_modes(struct drm_connector *connector)
271{
272 struct sii902x *sii902x = connector_to_sii902x(connector);
273 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
274 u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
275 struct edid *edid;
276 int num = 0, ret;
277
278 mutex_lock(&sii902x->mutex);
279
280 edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
281 drm_connector_update_edid_property(connector, edid);
282 if (edid) {
283 if (drm_detect_hdmi_monitor(edid))
284 output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
285
286 num = drm_add_edid_modes(connector, edid);
287 kfree(edid);
288 }
289
290 ret = drm_display_info_set_bus_formats(&connector->display_info,
291 &bus_format, 1);
292 if (ret)
293 goto error_out;
294
295 ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
296 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
297 if (ret)
298 goto error_out;
299
300 ret = num;
301
302error_out:
303 mutex_unlock(&sii902x->mutex);
304
305 return ret;
306}
307
308static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
309 struct drm_display_mode *mode)
310{
311 /* TODO: check mode */
312
313 return MODE_OK;
314}
315
316static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
317 .get_modes = sii902x_get_modes,
318 .mode_valid = sii902x_mode_valid,
319};
320
321static void sii902x_bridge_disable(struct drm_bridge *bridge)
322{
323 struct sii902x *sii902x = bridge_to_sii902x(bridge);
324
325 mutex_lock(&sii902x->mutex);
326
327 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
328 SII902X_SYS_CTRL_PWR_DWN,
329 SII902X_SYS_CTRL_PWR_DWN);
330
331 mutex_unlock(&sii902x->mutex);
332}
333
334static void sii902x_bridge_enable(struct drm_bridge *bridge)
335{
336 struct sii902x *sii902x = bridge_to_sii902x(bridge);
337
338 mutex_lock(&sii902x->mutex);
339
340 regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
341 SII902X_AVI_POWER_STATE_MSK,
342 SII902X_AVI_POWER_STATE_D(0));
343 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
344 SII902X_SYS_CTRL_PWR_DWN, 0);
345
346 mutex_unlock(&sii902x->mutex);
347}
348
349static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
350 const struct drm_display_mode *mode,
351 const struct drm_display_mode *adj)
352{
353 struct sii902x *sii902x = bridge_to_sii902x(bridge);
354 struct regmap *regmap = sii902x->regmap;
355 u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
356 struct hdmi_avi_infoframe frame;
357 u16 pixel_clock_10kHz = adj->clock / 10;
358 int ret;
359
360 buf[0] = pixel_clock_10kHz & 0xff;
361 buf[1] = pixel_clock_10kHz >> 8;
362 buf[2] = adj->vrefresh;
363 buf[3] = 0x00;
364 buf[4] = adj->hdisplay;
365 buf[5] = adj->hdisplay >> 8;
366 buf[6] = adj->vdisplay;
367 buf[7] = adj->vdisplay >> 8;
368 buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
369 SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
370 buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
371 SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
372
373 mutex_lock(&sii902x->mutex);
374
375 ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
376 if (ret)
377 goto out;
378
379 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
380 &sii902x->connector, adj);
381 if (ret < 0) {
382 DRM_ERROR("couldn't fill AVI infoframe\n");
383 goto out;
384 }
385
386 ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
387 if (ret < 0) {
388 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
389 goto out;
390 }
391
392 /* Do not send the infoframe header, but keep the CRC field. */
393 regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
394 buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
395 HDMI_AVI_INFOFRAME_SIZE + 1);
396
397out:
398 mutex_unlock(&sii902x->mutex);
399}
400
401static int sii902x_bridge_attach(struct drm_bridge *bridge)
402{
403 struct sii902x *sii902x = bridge_to_sii902x(bridge);
404 struct drm_device *drm = bridge->dev;
405 int ret;
406
407 drm_connector_helper_add(&sii902x->connector,
408 &sii902x_connector_helper_funcs);
409
410 if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
411 dev_err(&sii902x->i2c->dev,
412 "sii902x driver is only compatible with DRM devices supporting atomic updates\n");
413 return -ENOTSUPP;
414 }
415
416 ret = drm_connector_init(drm, &sii902x->connector,
417 &sii902x_connector_funcs,
418 DRM_MODE_CONNECTOR_HDMIA);
419 if (ret)
420 return ret;
421
422 if (sii902x->i2c->irq > 0)
423 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
424 else
425 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
426
427 drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
428
429 return 0;
430}
431
432static const struct drm_bridge_funcs sii902x_bridge_funcs = {
433 .attach = sii902x_bridge_attach,
434 .mode_set = sii902x_bridge_mode_set,
435 .disable = sii902x_bridge_disable,
436 .enable = sii902x_bridge_enable,
437};
438
439static int sii902x_mute(struct sii902x *sii902x, bool mute)
440{
441 struct device *dev = &sii902x->i2c->dev;
442 unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
443 SII902X_TPI_AUDIO_MUTE_DISABLE;
444
445 dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
446
447 return regmap_update_bits(sii902x->regmap,
448 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
449 SII902X_TPI_AUDIO_MUTE_ENABLE, val);
450}
451
452static const int sii902x_mclk_div_table[] = {
453 128, 256, 384, 512, 768, 1024, 1152, 192 };
454
455static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
456 unsigned int mclk)
457{
458 int div = mclk / rate;
459 int distance = 100000;
460 u8 i, nearest = 0;
461
462 for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
463 unsigned int d = abs(div - sii902x_mclk_div_table[i]);
464
465 if (d >= distance)
466 continue;
467
468 nearest = i;
469 distance = d;
470 if (d == 0)
471 break;
472 }
473
474 *i2s_config_reg |= nearest << 4;
475
476 return sii902x_mclk_div_table[nearest];
477}
478
479static const struct sii902x_sample_freq {
480 u32 freq;
481 u8 val;
482} sii902x_sample_freq[] = {
483 { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ },
484 { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ },
485 { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ },
486 { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ },
487 { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ },
488 { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ },
489 { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ },
490};
491
492static int sii902x_audio_hw_params(struct device *dev, void *data,
493 struct hdmi_codec_daifmt *daifmt,
494 struct hdmi_codec_params *params)
495{
496 struct sii902x *sii902x = dev_get_drvdata(dev);
497 u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
498 u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
499 SII902X_TPI_AUDIO_MUTE_ENABLE |
500 SII902X_TPI_AUDIO_CODING_PCM);
501 u8 config_byte3_reg = 0;
502 u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
503 unsigned long mclk_rate;
504 int i, ret;
505
506 if (daifmt->bit_clk_master || daifmt->frame_clk_master) {
507 dev_dbg(dev, "%s: I2S master mode not supported\n", __func__);
508 return -EINVAL;
509 }
510
511 switch (daifmt->fmt) {
512 case HDMI_I2S:
513 i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
514 SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
515 break;
516 case HDMI_RIGHT_J:
517 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
518 break;
519 case HDMI_LEFT_J:
520 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
521 break;
522 default:
523 dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
524 daifmt->fmt);
525 return -EINVAL;
526 }
527
528 if (daifmt->bit_clk_inv)
529 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
530 else
531 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
532
533 if (daifmt->frame_clk_inv)
534 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
535 else
536 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
537
538 if (params->channels > 2)
539 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
540 else
541 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
542
543 switch (params->sample_width) {
544 case 16:
545 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
546 break;
547 case 20:
548 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
549 break;
550 case 24:
551 case 32:
552 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
553 break;
554 default:
555 dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
556 params->sample_width);
557 return -EINVAL;
558 }
559
560 for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
561 if (params->sample_rate == sii902x_sample_freq[i].freq) {
562 config_byte3_reg |= sii902x_sample_freq[i].val;
563 break;
564 }
565 }
566
567 ret = clk_prepare_enable(sii902x->audio.mclk);
568 if (ret) {
569 dev_err(dev, "Enabling mclk failed: %d\n", ret);
570 return ret;
571 }
572
573 if (sii902x->audio.mclk) {
574 mclk_rate = clk_get_rate(sii902x->audio.mclk);
575 ret = sii902x_select_mclk_div(&i2s_config_reg,
576 params->sample_rate, mclk_rate);
577 if (mclk_rate != ret * params->sample_rate)
578 dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
579 mclk_rate, ret, params->sample_rate);
580 }
581
582 mutex_lock(&sii902x->mutex);
583
584 ret = regmap_write(sii902x->regmap,
585 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
586 config_byte2_reg);
587 if (ret < 0)
588 goto out;
589
590 ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
591 i2s_config_reg);
592 if (ret)
593 goto out;
594
595 for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) &&
596 sii902x->audio.i2s_fifo_sequence[i]; i++)
597 regmap_write(sii902x->regmap,
598 SII902X_TPI_I2S_ENABLE_MAPPING_REG,
599 sii902x->audio.i2s_fifo_sequence[i]);
600
601 ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
602 config_byte3_reg);
603 if (ret)
604 goto out;
605
606 ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
607 params->iec.status,
608 min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
609 sizeof(params->iec.status)));
610 if (ret)
611 goto out;
612
613 ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf,
614 sizeof(infoframe_buf));
615 if (ret < 0) {
616 dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
617 __func__, ret);
618 goto out;
619 }
620
621 ret = regmap_bulk_write(sii902x->regmap,
622 SII902X_TPI_MISC_INFOFRAME_BASE,
623 infoframe_buf,
624 min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
625 if (ret)
626 goto out;
627
628 /* Decode Level 0 Packets */
629 ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
630 if (ret)
631 goto out;
632
633 ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
634 if (ret)
635 goto out;
636
637 ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
638 if (ret)
639 goto out;
640
641 dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
642out:
643 mutex_unlock(&sii902x->mutex);
644
645 if (ret) {
646 clk_disable_unprepare(sii902x->audio.mclk);
647 dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
648 ret);
649 }
650
651 return ret;
652}
653
654static void sii902x_audio_shutdown(struct device *dev, void *data)
655{
656 struct sii902x *sii902x = dev_get_drvdata(dev);
657
658 mutex_lock(&sii902x->mutex);
659
660 regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
661 SII902X_TPI_AUDIO_INTERFACE_DISABLE);
662
663 mutex_unlock(&sii902x->mutex);
664
665 clk_disable_unprepare(sii902x->audio.mclk);
666}
667
668static int sii902x_audio_digital_mute(struct device *dev,
669 void *data, bool enable)
670{
671 struct sii902x *sii902x = dev_get_drvdata(dev);
672
673 mutex_lock(&sii902x->mutex);
674
675 sii902x_mute(sii902x, enable);
676
677 mutex_unlock(&sii902x->mutex);
678
679 return 0;
680}
681
682static int sii902x_audio_get_eld(struct device *dev, void *data,
683 uint8_t *buf, size_t len)
684{
685 struct sii902x *sii902x = dev_get_drvdata(dev);
686
687 mutex_lock(&sii902x->mutex);
688
689 memcpy(buf, sii902x->connector.eld,
690 min(sizeof(sii902x->connector.eld), len));
691
692 mutex_unlock(&sii902x->mutex);
693
694 return 0;
695}
696
697static int sii902x_audio_get_dai_id(struct snd_soc_component *component,
698 struct device_node *endpoint)
699{
700 struct of_endpoint of_ep;
701 int ret;
702
703 ret = of_graph_parse_endpoint(endpoint, &of_ep);
704 if (ret < 0)
705 return ret;
706
707 /*
708 * HDMI sound should be located at reg = <3>
709 * Return expected DAI index 0.
710 */
711 if (of_ep.port == SII902X_AUDIO_PORT_INDEX)
712 return 0;
713
714 return -EINVAL;
715}
716
717static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
718 .hw_params = sii902x_audio_hw_params,
719 .audio_shutdown = sii902x_audio_shutdown,
720 .digital_mute = sii902x_audio_digital_mute,
721 .get_eld = sii902x_audio_get_eld,
722 .get_dai_id = sii902x_audio_get_dai_id,
723};
724
725static int sii902x_audio_codec_init(struct sii902x *sii902x,
726 struct device *dev)
727{
728 static const u8 audio_fifo_id[] = {
729 SII902X_TPI_I2S_CONFIG_FIFO0,
730 SII902X_TPI_I2S_CONFIG_FIFO1,
731 SII902X_TPI_I2S_CONFIG_FIFO2,
732 SII902X_TPI_I2S_CONFIG_FIFO3,
733 };
734 static const u8 i2s_lane_id[] = {
735 SII902X_TPI_I2S_SELECT_SD0,
736 SII902X_TPI_I2S_SELECT_SD1,
737 SII902X_TPI_I2S_SELECT_SD2,
738 SII902X_TPI_I2S_SELECT_SD3,
739 };
740 struct hdmi_codec_pdata codec_data = {
741 .ops = &sii902x_audio_codec_ops,
742 .i2s = 1, /* Only i2s support for now. */
743 .spdif = 0,
744 .max_i2s_channels = 0,
745 };
746 u8 lanes[4];
747 int num_lanes, i;
748
749 if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
750 dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
751 __func__);
752 return 0;
753 }
754
755 num_lanes = of_property_read_variable_u8_array(dev->of_node,
756 "sil,i2s-data-lanes",
757 lanes, 1,
758 ARRAY_SIZE(lanes));
759
760 if (num_lanes == -EINVAL) {
761 dev_dbg(dev,
762 "%s: No \"sil,i2s-data-lanes\", use default <0>\n",
763 __func__);
764 num_lanes = 1;
765 lanes[0] = 0;
766 } else if (num_lanes < 0) {
767 dev_err(dev,
768 "%s: Error gettin \"sil,i2s-data-lanes\": %d\n",
769 __func__, num_lanes);
770 return num_lanes;
771 }
772 codec_data.max_i2s_channels = 2 * num_lanes;
773
774 for (i = 0; i < num_lanes; i++)
775 sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |
776 i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE;
777
778 sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk");
779 if (IS_ERR(sii902x->audio.mclk)) {
780 dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
781 __func__, PTR_ERR(sii902x->audio.mclk));
782 return PTR_ERR(sii902x->audio.mclk);
783 }
784
785 sii902x->audio.pdev = platform_device_register_data(
786 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
787 &codec_data, sizeof(codec_data));
788
789 return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
790}
791
792static const struct regmap_range sii902x_volatile_ranges[] = {
793 { .range_min = 0, .range_max = 0xff },
794};
795
796static const struct regmap_access_table sii902x_volatile_table = {
797 .yes_ranges = sii902x_volatile_ranges,
798 .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
799};
800
801static const struct regmap_config sii902x_regmap_config = {
802 .reg_bits = 8,
803 .val_bits = 8,
804 .disable_locking = true, /* struct sii902x mutex should be enough */
805 .max_register = SII902X_TPI_MISC_INFOFRAME_END,
806 .volatile_table = &sii902x_volatile_table,
807 .cache_type = REGCACHE_NONE,
808};
809
810static irqreturn_t sii902x_interrupt(int irq, void *data)
811{
812 struct sii902x *sii902x = data;
813 unsigned int status = 0;
814
815 mutex_lock(&sii902x->mutex);
816
817 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
818 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
819
820 mutex_unlock(&sii902x->mutex);
821
822 if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev)
823 drm_helper_hpd_irq_event(sii902x->bridge.dev);
824
825 return IRQ_HANDLED;
826}
827
828/*
829 * The purpose of sii902x_i2c_bypass_select is to enable the pass through
830 * mode of the HDMI transmitter. Do not use regmap from within this function,
831 * only use sii902x_*_unlocked functions to read/modify/write registers.
832 * We are holding the parent adapter lock here, keep this in mind before
833 * adding more i2c transactions.
834 *
835 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
836 * in this driver, we need to make sure that we only touch 0x1A[2:1] from
837 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
838 * we leave the remaining bits as we have found them.
839 */
840static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
841{
842 struct sii902x *sii902x = i2c_mux_priv(mux);
843 struct device *dev = &sii902x->i2c->dev;
844 unsigned long timeout;
845 u8 status;
846 int ret;
847
848 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
849 SII902X_SYS_CTRL_DDC_BUS_REQ,
850 SII902X_SYS_CTRL_DDC_BUS_REQ);
851 if (ret)
852 return ret;
853
854 timeout = jiffies +
855 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
856 do {
857 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
858 &status);
859 if (ret)
860 return ret;
861 } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
862 time_before(jiffies, timeout));
863
864 if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
865 dev_err(dev, "Failed to acquire the i2c bus\n");
866 return -ETIMEDOUT;
867 }
868
869 return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
870 status);
871}
872
873/*
874 * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
875 * mode of the HDMI transmitter. Do not use regmap from within this function,
876 * only use sii902x_*_unlocked functions to read/modify/write registers.
877 * We are holding the parent adapter lock here, keep this in mind before
878 * adding more i2c transactions.
879 *
880 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
881 * in this driver, we need to make sure that we only touch 0x1A[2:1] from
882 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
883 * we leave the remaining bits as we have found them.
884 */
885static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
886{
887 struct sii902x *sii902x = i2c_mux_priv(mux);
888 struct device *dev = &sii902x->i2c->dev;
889 unsigned long timeout;
890 unsigned int retries;
891 u8 status;
892 int ret;
893
894 /*
895 * When the HDMI transmitter is in pass through mode, we need an
896 * (undocumented) additional delay between STOP and START conditions
897 * to guarantee the bus won't get stuck.
898 */
899 udelay(30);
900
901 /*
902 * Sometimes the I2C bus can stall after failure to use the
903 * EDID channel. Retry a few times to see if things clear
904 * up, else continue anyway.
905 */
906 retries = 5;
907 do {
908 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
909 &status);
910 retries--;
911 } while (ret && retries);
912 if (ret) {
913 dev_err(dev, "failed to read status (%d)\n", ret);
914 return ret;
915 }
916
917 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
918 SII902X_SYS_CTRL_DDC_BUS_REQ |
919 SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
920 if (ret)
921 return ret;
922
923 timeout = jiffies +
924 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
925 do {
926 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
927 &status);
928 if (ret)
929 return ret;
930 } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
931 SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
932 time_before(jiffies, timeout));
933
934 if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
935 SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
936 dev_err(dev, "failed to release the i2c bus\n");
937 return -ETIMEDOUT;
938 }
939
940 return 0;
941}
942
943static const struct drm_bridge_timings default_sii902x_timings = {
944 .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
945 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
946 | DRM_BUS_FLAG_DE_HIGH,
947};
948
949static int sii902x_probe(struct i2c_client *client,
950 const struct i2c_device_id *id)
951{
952 struct device *dev = &client->dev;
953 unsigned int status = 0;
954 struct sii902x *sii902x;
955 u8 chipid[4];
956 int ret;
957
958 ret = i2c_check_functionality(client->adapter,
959 I2C_FUNC_SMBUS_BYTE_DATA);
960 if (!ret) {
961 dev_err(dev, "I2C adapter not suitable\n");
962 return -EIO;
963 }
964
965 sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
966 if (!sii902x)
967 return -ENOMEM;
968
969 sii902x->i2c = client;
970 sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
971 if (IS_ERR(sii902x->regmap))
972 return PTR_ERR(sii902x->regmap);
973
974 sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
975 GPIOD_OUT_LOW);
976 if (IS_ERR(sii902x->reset_gpio)) {
977 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
978 PTR_ERR(sii902x->reset_gpio));
979 return PTR_ERR(sii902x->reset_gpio);
980 }
981
982 mutex_init(&sii902x->mutex);
983
984 sii902x_reset(sii902x);
985
986 ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
987 if (ret)
988 return ret;
989
990 ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
991 &chipid, 4);
992 if (ret) {
993 dev_err(dev, "regmap_read failed %d\n", ret);
994 return ret;
995 }
996
997 if (chipid[0] != 0xb0) {
998 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
999 chipid[0]);
1000 return -EINVAL;
1001 }
1002
1003 /* Clear all pending interrupts */
1004 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
1005 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
1006
1007 if (client->irq > 0) {
1008 regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
1009 SII902X_HOTPLUG_EVENT);
1010
1011 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1012 sii902x_interrupt,
1013 IRQF_ONESHOT, dev_name(dev),
1014 sii902x);
1015 if (ret)
1016 return ret;
1017 }
1018
1019 sii902x->bridge.funcs = &sii902x_bridge_funcs;
1020 sii902x->bridge.of_node = dev->of_node;
1021 sii902x->bridge.timings = &default_sii902x_timings;
1022 drm_bridge_add(&sii902x->bridge);
1023
1024 sii902x_audio_codec_init(sii902x, dev);
1025
1026 i2c_set_clientdata(client, sii902x);
1027
1028 sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
1029 1, 0, I2C_MUX_GATE,
1030 sii902x_i2c_bypass_select,
1031 sii902x_i2c_bypass_deselect);
1032 if (!sii902x->i2cmux)
1033 return -ENOMEM;
1034
1035 sii902x->i2cmux->priv = sii902x;
1036 return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
1037}
1038
1039static int sii902x_remove(struct i2c_client *client)
1040
1041{
1042 struct sii902x *sii902x = i2c_get_clientdata(client);
1043
1044 i2c_mux_del_adapters(sii902x->i2cmux);
1045 drm_bridge_remove(&sii902x->bridge);
1046
1047 return 0;
1048}
1049
1050static const struct of_device_id sii902x_dt_ids[] = {
1051 { .compatible = "sil,sii9022", },
1052 { }
1053};
1054MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
1055
1056static const struct i2c_device_id sii902x_i2c_ids[] = {
1057 { "sii9022", 0 },
1058 { },
1059};
1060MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
1061
1062static struct i2c_driver sii902x_driver = {
1063 .probe = sii902x_probe,
1064 .remove = sii902x_remove,
1065 .driver = {
1066 .name = "sii902x",
1067 .of_match_table = sii902x_dt_ids,
1068 },
1069 .id_table = sii902x_i2c_ids,
1070};
1071module_i2c_driver(sii902x_driver);
1072
1073MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
1074MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
1075MODULE_LICENSE("GPL");