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
166 struct 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
sii902x_read_unlocked(struct i2c_client * i2c,u8 reg,u8 * val)187 static 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
sii902x_write_unlocked(struct i2c_client * i2c,u8 reg,u8 val)202 static 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
sii902x_update_bits_unlocked(struct i2c_client * i2c,u8 reg,u8 mask,u8 val)213 static 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
bridge_to_sii902x(struct drm_bridge * bridge)227 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
228 {
229 return container_of(bridge, struct sii902x, bridge);
230 }
231
connector_to_sii902x(struct drm_connector * con)232 static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
233 {
234 return container_of(con, struct sii902x, connector);
235 }
236
sii902x_reset(struct sii902x * sii902x)237 static 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
sii902x_detect(struct sii902x * sii902x)250 static 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
264 static enum drm_connector_status
sii902x_connector_detect(struct drm_connector * connector,bool force)265 sii902x_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
272 static 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
sii902x_get_edid(struct sii902x * sii902x,struct drm_connector * connector)281 static 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
sii902x_get_modes(struct drm_connector * connector)301 static 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
sii902x_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)317 static 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
325 static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
326 .get_modes = sii902x_get_modes,
327 .mode_valid = sii902x_mode_valid,
328 };
329
sii902x_bridge_disable(struct drm_bridge * bridge)330 static 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
sii902x_bridge_enable(struct drm_bridge * bridge)343 static 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
sii902x_bridge_mode_set(struct drm_bridge * bridge,const struct drm_display_mode * mode,const struct drm_display_mode * adj)358 static 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
415 out:
416 mutex_unlock(&sii902x->mutex);
417 }
418
sii902x_bridge_attach(struct drm_bridge * bridge,enum drm_bridge_attach_flags flags)419 static 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
sii902x_bridge_detect(struct drm_bridge * bridge)461 static 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
sii902x_bridge_get_edid(struct drm_bridge * bridge,struct drm_connector * connector)468 static 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
sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state,u32 output_fmt,unsigned int * num_input_fmts)476 static 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
sii902x_bridge_atomic_check(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state)497 static 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
511 static 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
sii902x_mute(struct sii902x * sii902x,bool mute)525 static 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
538 static const int sii902x_mclk_div_table[] = {
539 128, 256, 384, 512, 768, 1024, 1152, 192 };
540
sii902x_select_mclk_div(u8 * i2s_config_reg,unsigned int rate,unsigned int mclk)541 static 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
565 static 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
sii902x_audio_hw_params(struct device * dev,void * data,struct hdmi_codec_daifmt * daifmt,struct hdmi_codec_params * params)578 static 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__);
729 out:
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
sii902x_audio_shutdown(struct device * dev,void * data)741 static 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
sii902x_audio_mute(struct device * dev,void * data,bool enable,int direction)755 static 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
sii902x_audio_get_eld(struct device * dev,void * data,uint8_t * buf,size_t len)769 static 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
sii902x_audio_get_dai_id(struct snd_soc_component * component,struct device_node * endpoint)784 static 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
804 static 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
sii902x_audio_codec_init(struct sii902x * sii902x,struct device * dev)813 static 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
880 static const struct regmap_range sii902x_volatile_ranges[] = {
881 { .range_min = 0, .range_max = 0xff },
882 };
883
884 static 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
889 static 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
sii902x_interrupt(int irq,void * data)898 static 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 */
sii902x_i2c_bypass_select(struct i2c_mux_core * mux,u32 chan_id)932 static 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 */
sii902x_i2c_bypass_deselect(struct i2c_mux_core * mux,u32 chan_id)977 static 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
1035 static 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
sii902x_init(struct sii902x * sii902x)1041 static 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
1115 err_unreg_audio:
1116 if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev))
1117 platform_device_unregister(sii902x->audio.pdev);
1118
1119 return ret;
1120 }
1121
sii902x_probe(struct i2c_client * client)1122 static 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
sii902x_remove(struct i2c_client * client)1186 static 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
1197 static const struct of_device_id sii902x_dt_ids[] = {
1198 { .compatible = "sil,sii9022", },
1199 { }
1200 };
1201 MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
1202
1203 static const struct i2c_device_id sii902x_i2c_ids[] = {
1204 { "sii9022", 0 },
1205 { },
1206 };
1207 MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
1208
1209 static 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 };
1218 module_i2c_driver(sii902x_driver);
1219
1220 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
1221 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
1222 MODULE_LICENSE("GPL");
1223