1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2018 Renesas Electronics
5 * Copyright (C) 2016 Atmel
6 * Bo Shen <voice.shen@atmel.com>
8 * Authors: Bo Shen <voice.shen@atmel.com>
9 * Boris Brezillon <boris.brezillon@free-electrons.com>
10 * Wu, Songjun <Songjun.Wu@atmel.com>
12 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
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>
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>
28 #include <sound/hdmi-codec.h>
30 #define SII902X_TPI_VIDEO_DATA 0x0
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)
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)
54 #define SII902X_TPI_AVI_INFOFRAME 0x0c
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
65 #define SII902X_REG_CHIPID(n) (0x1b + (n))
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)
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)
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)
105 #define SII902X_TPI_I2S_STRM_HDR_BASE 0x21
106 #define SII902X_TPI_I2S_STRM_HDR_SIZE 5
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)
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)
140 #define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG 0x28
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)
147 #define SII902X_REG_TPI_RQB 0xc7
149 /* Indirect internal register access */
150 #define SII902X_IND_SET_PAGE 0xbc
151 #define SII902X_IND_OFFSET 0xbd
152 #define SII902X_IND_VALUE 0xbe
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)
159 #define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500
162 struct i2c_client *i2c;
163 struct regmap *regmap;
164 struct drm_bridge bridge;
165 struct drm_connector connector;
166 struct gpio_desc *reset_gpio;
167 struct i2c_mux_core *i2cmux;
169 * Mutex protects audio and video functions from interfering
170 * each other, by keeping their i2c command sequences atomic.
173 struct sii902x_audio {
174 struct platform_device *pdev;
176 u32 i2s_fifo_sequence[4];
180 static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
182 union i2c_smbus_data data;
185 ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
186 I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
195 static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
197 union i2c_smbus_data data;
201 return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
202 I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
206 static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
212 ret = sii902x_read_unlocked(i2c, reg, &status);
216 status |= val & mask;
217 return sii902x_write_unlocked(i2c, reg, status);
220 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
222 return container_of(bridge, struct sii902x, bridge);
225 static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
227 return container_of(con, struct sii902x, connector);
230 static void sii902x_reset(struct sii902x *sii902x)
232 if (!sii902x->reset_gpio)
235 gpiod_set_value(sii902x->reset_gpio, 1);
237 /* The datasheet says treset-min = 100us. Make it 150us to be sure. */
238 usleep_range(150, 200);
240 gpiod_set_value(sii902x->reset_gpio, 0);
243 static enum drm_connector_status
244 sii902x_connector_detect(struct drm_connector *connector, bool force)
246 struct sii902x *sii902x = connector_to_sii902x(connector);
249 mutex_lock(&sii902x->mutex);
251 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
253 mutex_unlock(&sii902x->mutex);
255 return (status & SII902X_PLUGGED_STATUS) ?
256 connector_status_connected : connector_status_disconnected;
259 static const struct drm_connector_funcs sii902x_connector_funcs = {
260 .detect = sii902x_connector_detect,
261 .fill_modes = drm_helper_probe_single_connector_modes,
262 .destroy = drm_connector_cleanup,
263 .reset = drm_atomic_helper_connector_reset,
264 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
265 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
268 static int sii902x_get_modes(struct drm_connector *connector)
270 struct sii902x *sii902x = connector_to_sii902x(connector);
271 u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
272 u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
276 mutex_lock(&sii902x->mutex);
278 edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
279 drm_connector_update_edid_property(connector, edid);
281 if (drm_detect_hdmi_monitor(edid))
282 output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
284 num = drm_add_edid_modes(connector, edid);
288 ret = drm_display_info_set_bus_formats(&connector->display_info,
293 ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
294 SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
301 mutex_unlock(&sii902x->mutex);
306 static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
307 struct drm_display_mode *mode)
309 /* TODO: check mode */
314 static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
315 .get_modes = sii902x_get_modes,
316 .mode_valid = sii902x_mode_valid,
319 static void sii902x_bridge_disable(struct drm_bridge *bridge)
321 struct sii902x *sii902x = bridge_to_sii902x(bridge);
323 mutex_lock(&sii902x->mutex);
325 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
326 SII902X_SYS_CTRL_PWR_DWN,
327 SII902X_SYS_CTRL_PWR_DWN);
329 mutex_unlock(&sii902x->mutex);
332 static void sii902x_bridge_enable(struct drm_bridge *bridge)
334 struct sii902x *sii902x = bridge_to_sii902x(bridge);
336 mutex_lock(&sii902x->mutex);
338 regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
339 SII902X_AVI_POWER_STATE_MSK,
340 SII902X_AVI_POWER_STATE_D(0));
341 regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
342 SII902X_SYS_CTRL_PWR_DWN, 0);
344 mutex_unlock(&sii902x->mutex);
347 static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
348 const struct drm_display_mode *mode,
349 const struct drm_display_mode *adj)
351 struct sii902x *sii902x = bridge_to_sii902x(bridge);
352 struct regmap *regmap = sii902x->regmap;
353 u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
354 struct hdmi_avi_infoframe frame;
355 u16 pixel_clock_10kHz = adj->clock / 10;
358 buf[0] = pixel_clock_10kHz & 0xff;
359 buf[1] = pixel_clock_10kHz >> 8;
360 buf[2] = adj->vrefresh;
362 buf[4] = adj->hdisplay;
363 buf[5] = adj->hdisplay >> 8;
364 buf[6] = adj->vdisplay;
365 buf[7] = adj->vdisplay >> 8;
366 buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
367 SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
368 buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
369 SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
371 mutex_lock(&sii902x->mutex);
373 ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
377 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
378 &sii902x->connector, adj);
380 DRM_ERROR("couldn't fill AVI infoframe\n");
384 ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
386 DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
390 /* Do not send the infoframe header, but keep the CRC field. */
391 regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
392 buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
393 HDMI_AVI_INFOFRAME_SIZE + 1);
396 mutex_unlock(&sii902x->mutex);
399 static int sii902x_bridge_attach(struct drm_bridge *bridge)
401 struct sii902x *sii902x = bridge_to_sii902x(bridge);
402 struct drm_device *drm = bridge->dev;
405 drm_connector_helper_add(&sii902x->connector,
406 &sii902x_connector_helper_funcs);
408 if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
409 dev_err(&sii902x->i2c->dev,
410 "sii902x driver is only compatible with DRM devices supporting atomic updates\n");
414 ret = drm_connector_init(drm, &sii902x->connector,
415 &sii902x_connector_funcs,
416 DRM_MODE_CONNECTOR_HDMIA);
420 if (sii902x->i2c->irq > 0)
421 sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
423 sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
425 drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
430 static const struct drm_bridge_funcs sii902x_bridge_funcs = {
431 .attach = sii902x_bridge_attach,
432 .mode_set = sii902x_bridge_mode_set,
433 .disable = sii902x_bridge_disable,
434 .enable = sii902x_bridge_enable,
437 static int sii902x_mute(struct sii902x *sii902x, bool mute)
439 struct device *dev = &sii902x->i2c->dev;
440 unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
441 SII902X_TPI_AUDIO_MUTE_DISABLE;
443 dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
445 return regmap_update_bits(sii902x->regmap,
446 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
447 SII902X_TPI_AUDIO_MUTE_ENABLE, val);
450 static const int sii902x_mclk_div_table[] = {
451 128, 256, 384, 512, 768, 1024, 1152, 192 };
453 static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
456 int div = mclk / rate;
457 int distance = 100000;
460 for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
461 unsigned int d = abs(div - sii902x_mclk_div_table[i]);
472 *i2s_config_reg |= nearest << 4;
474 return sii902x_mclk_div_table[nearest];
477 static const struct sii902x_sample_freq {
480 } sii902x_sample_freq[] = {
481 { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ },
482 { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ },
483 { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ },
484 { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ },
485 { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ },
486 { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ },
487 { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ },
490 static int sii902x_audio_hw_params(struct device *dev, void *data,
491 struct hdmi_codec_daifmt *daifmt,
492 struct hdmi_codec_params *params)
494 struct sii902x *sii902x = dev_get_drvdata(dev);
495 u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
496 u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
497 SII902X_TPI_AUDIO_MUTE_ENABLE |
498 SII902X_TPI_AUDIO_CODING_PCM);
499 u8 config_byte3_reg = 0;
500 u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
501 unsigned long mclk_rate;
504 if (daifmt->bit_clk_master || daifmt->frame_clk_master) {
505 dev_dbg(dev, "%s: I2S master mode not supported\n", __func__);
509 switch (daifmt->fmt) {
511 i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
512 SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
515 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
518 i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
521 dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
526 if (daifmt->bit_clk_inv)
527 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
529 i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
531 if (daifmt->frame_clk_inv)
532 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
534 i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
536 if (params->channels > 2)
537 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
539 config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
541 switch (params->sample_width) {
543 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
546 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
550 config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
553 dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
554 params->sample_width);
558 for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
559 if (params->sample_rate == sii902x_sample_freq[i].freq) {
560 config_byte3_reg |= sii902x_sample_freq[i].val;
565 ret = clk_prepare_enable(sii902x->audio.mclk);
567 dev_err(dev, "Enabling mclk failed: %d\n", ret);
571 mclk_rate = clk_get_rate(sii902x->audio.mclk);
573 ret = sii902x_select_mclk_div(&i2s_config_reg, params->sample_rate,
575 if (mclk_rate != ret * params->sample_rate)
576 dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
577 mclk_rate, ret, params->sample_rate);
579 mutex_lock(&sii902x->mutex);
581 ret = regmap_write(sii902x->regmap,
582 SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
587 ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
592 for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) &&
593 sii902x->audio.i2s_fifo_sequence[i]; i++)
594 regmap_write(sii902x->regmap,
595 SII902X_TPI_I2S_ENABLE_MAPPING_REG,
596 sii902x->audio.i2s_fifo_sequence[i]);
598 ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
603 ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
605 min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
606 sizeof(params->iec.status)));
610 ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf,
611 sizeof(infoframe_buf));
613 dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
618 ret = regmap_bulk_write(sii902x->regmap,
619 SII902X_TPI_MISC_INFOFRAME_BASE,
621 min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
625 /* Decode Level 0 Packets */
626 ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
630 ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
634 ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
638 dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
640 mutex_unlock(&sii902x->mutex);
643 clk_disable_unprepare(sii902x->audio.mclk);
644 dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
651 static void sii902x_audio_shutdown(struct device *dev, void *data)
653 struct sii902x *sii902x = dev_get_drvdata(dev);
655 mutex_lock(&sii902x->mutex);
657 regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
658 SII902X_TPI_AUDIO_INTERFACE_DISABLE);
660 mutex_unlock(&sii902x->mutex);
662 clk_disable_unprepare(sii902x->audio.mclk);
665 int sii902x_audio_digital_mute(struct device *dev, void *data, bool enable)
667 struct sii902x *sii902x = dev_get_drvdata(dev);
669 mutex_lock(&sii902x->mutex);
671 sii902x_mute(sii902x, enable);
673 mutex_unlock(&sii902x->mutex);
678 static int sii902x_audio_get_eld(struct device *dev, void *data,
679 uint8_t *buf, size_t len)
681 struct sii902x *sii902x = dev_get_drvdata(dev);
683 mutex_lock(&sii902x->mutex);
685 memcpy(buf, sii902x->connector.eld,
686 min(sizeof(sii902x->connector.eld), len));
688 mutex_unlock(&sii902x->mutex);
693 static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
694 .hw_params = sii902x_audio_hw_params,
695 .audio_shutdown = sii902x_audio_shutdown,
696 .digital_mute = sii902x_audio_digital_mute,
697 .get_eld = sii902x_audio_get_eld,
700 static int sii902x_audio_codec_init(struct sii902x *sii902x,
703 static const u8 audio_fifo_id[] = {
704 SII902X_TPI_I2S_CONFIG_FIFO0,
705 SII902X_TPI_I2S_CONFIG_FIFO1,
706 SII902X_TPI_I2S_CONFIG_FIFO2,
707 SII902X_TPI_I2S_CONFIG_FIFO3,
709 static const u8 i2s_lane_id[] = {
710 SII902X_TPI_I2S_SELECT_SD0,
711 SII902X_TPI_I2S_SELECT_SD1,
712 SII902X_TPI_I2S_SELECT_SD2,
713 SII902X_TPI_I2S_SELECT_SD3,
715 struct hdmi_codec_pdata codec_data = {
716 .ops = &sii902x_audio_codec_ops,
717 .i2s = 1, /* Only i2s support for now. */
719 .max_i2s_channels = 0,
724 if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
725 dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
730 num_lanes = of_property_read_variable_u8_array(dev->of_node,
731 "sil,i2s-data-lanes",
735 if (num_lanes == -EINVAL) {
737 "%s: No \"sil,i2s-data-lanes\", use default <0>\n",
741 } else if (num_lanes < 0) {
743 "%s: Error gettin \"sil,i2s-data-lanes\": %d\n",
744 __func__, num_lanes);
747 codec_data.max_i2s_channels = 2 * num_lanes;
749 for (i = 0; i < num_lanes; i++)
750 sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |
751 i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE;
753 if (IS_ERR(sii902x->audio.mclk)) {
754 dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
755 __func__, PTR_ERR(sii902x->audio.mclk));
759 sii902x->audio.pdev = platform_device_register_data(
760 dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
761 &codec_data, sizeof(codec_data));
763 return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
766 static const struct regmap_range sii902x_volatile_ranges[] = {
767 { .range_min = 0, .range_max = 0xff },
770 static const struct regmap_access_table sii902x_volatile_table = {
771 .yes_ranges = sii902x_volatile_ranges,
772 .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
775 static const struct regmap_config sii902x_regmap_config = {
778 .disable_locking = true, /* struct sii902x mutex should be enough */
779 .max_register = SII902X_TPI_MISC_INFOFRAME_END,
780 .volatile_table = &sii902x_volatile_table,
781 .cache_type = REGCACHE_NONE,
784 static irqreturn_t sii902x_interrupt(int irq, void *data)
786 struct sii902x *sii902x = data;
787 unsigned int status = 0;
789 mutex_lock(&sii902x->mutex);
791 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
792 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
794 mutex_unlock(&sii902x->mutex);
796 if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev)
797 drm_helper_hpd_irq_event(sii902x->bridge.dev);
803 * The purpose of sii902x_i2c_bypass_select is to enable the pass through
804 * mode of the HDMI transmitter. Do not use regmap from within this function,
805 * only use sii902x_*_unlocked functions to read/modify/write registers.
806 * We are holding the parent adapter lock here, keep this in mind before
807 * adding more i2c transactions.
809 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
810 * in this driver, we need to make sure that we only touch 0x1A[2:1] from
811 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
812 * we leave the remaining bits as we have found them.
814 static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
816 struct sii902x *sii902x = i2c_mux_priv(mux);
817 struct device *dev = &sii902x->i2c->dev;
818 unsigned long timeout;
822 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
823 SII902X_SYS_CTRL_DDC_BUS_REQ,
824 SII902X_SYS_CTRL_DDC_BUS_REQ);
829 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
831 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
835 } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
836 time_before(jiffies, timeout));
838 if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
839 dev_err(dev, "Failed to acquire the i2c bus\n");
843 return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
848 * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
849 * mode of the HDMI transmitter. Do not use regmap from within this function,
850 * only use sii902x_*_unlocked functions to read/modify/write registers.
851 * We are holding the parent adapter lock here, keep this in mind before
852 * adding more i2c transactions.
854 * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
855 * in this driver, we need to make sure that we only touch 0x1A[2:1] from
856 * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
857 * we leave the remaining bits as we have found them.
859 static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
861 struct sii902x *sii902x = i2c_mux_priv(mux);
862 struct device *dev = &sii902x->i2c->dev;
863 unsigned long timeout;
864 unsigned int retries;
869 * When the HDMI transmitter is in pass through mode, we need an
870 * (undocumented) additional delay between STOP and START conditions
871 * to guarantee the bus won't get stuck.
876 * Sometimes the I2C bus can stall after failure to use the
877 * EDID channel. Retry a few times to see if things clear
878 * up, else continue anyway.
882 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
885 } while (ret && retries);
887 dev_err(dev, "failed to read status (%d)\n", ret);
891 ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
892 SII902X_SYS_CTRL_DDC_BUS_REQ |
893 SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
898 msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
900 ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
904 } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
905 SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
906 time_before(jiffies, timeout));
908 if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
909 SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
910 dev_err(dev, "failed to release the i2c bus\n");
917 static const struct drm_bridge_timings default_sii902x_timings = {
918 .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
919 | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
920 | DRM_BUS_FLAG_DE_HIGH,
923 static int sii902x_probe(struct i2c_client *client,
924 const struct i2c_device_id *id)
926 struct device *dev = &client->dev;
927 unsigned int status = 0;
928 struct sii902x *sii902x;
932 ret = i2c_check_functionality(client->adapter,
933 I2C_FUNC_SMBUS_BYTE_DATA);
935 dev_err(dev, "I2C adapter not suitable\n");
939 sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
943 sii902x->i2c = client;
944 sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
945 if (IS_ERR(sii902x->regmap))
946 return PTR_ERR(sii902x->regmap);
948 sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
950 if (IS_ERR(sii902x->reset_gpio)) {
951 dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
952 PTR_ERR(sii902x->reset_gpio));
953 return PTR_ERR(sii902x->reset_gpio);
956 mutex_init(&sii902x->mutex);
958 sii902x_reset(sii902x);
960 ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
964 ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
967 dev_err(dev, "regmap_read failed %d\n", ret);
971 if (chipid[0] != 0xb0) {
972 dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
977 /* Clear all pending interrupts */
978 regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
979 regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
981 if (client->irq > 0) {
982 regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
983 SII902X_HOTPLUG_EVENT);
985 ret = devm_request_threaded_irq(dev, client->irq, NULL,
987 IRQF_ONESHOT, dev_name(dev),
993 sii902x->bridge.funcs = &sii902x_bridge_funcs;
994 sii902x->bridge.of_node = dev->of_node;
995 sii902x->bridge.timings = &default_sii902x_timings;
996 drm_bridge_add(&sii902x->bridge);
998 sii902x_audio_codec_init(sii902x, dev);
1000 i2c_set_clientdata(client, sii902x);
1002 sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
1004 sii902x_i2c_bypass_select,
1005 sii902x_i2c_bypass_deselect);
1006 if (!sii902x->i2cmux)
1009 sii902x->i2cmux->priv = sii902x;
1010 return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
1013 static int sii902x_remove(struct i2c_client *client)
1016 struct sii902x *sii902x = i2c_get_clientdata(client);
1018 i2c_mux_del_adapters(sii902x->i2cmux);
1019 drm_bridge_remove(&sii902x->bridge);
1024 static const struct of_device_id sii902x_dt_ids[] = {
1025 { .compatible = "sil,sii9022", },
1028 MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
1030 static const struct i2c_device_id sii902x_i2c_ids[] = {
1034 MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
1036 static struct i2c_driver sii902x_driver = {
1037 .probe = sii902x_probe,
1038 .remove = sii902x_remove,
1041 .of_match_table = sii902x_dt_ids,
1043 .id_table = sii902x_i2c_ids,
1045 module_i2c_driver(sii902x_driver);
1047 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
1048 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
1049 MODULE_LICENSE("GPL");