1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2014 MediaTek Inc.
4  * Author: Jie Qiu <jie.qiu@mediatek.com>
5  */
6 
7 #include <linux/arm-smccc.h>
8 #include <linux/clk.h>
9 #include <linux/delay.h>
10 #include <linux/hdmi.h>
11 #include <linux/i2c.h>
12 #include <linux/io.h>
13 #include <linux/kernel.h>
14 #include <linux/mfd/syscon.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/of_platform.h>
18 #include <linux/of.h>
19 #include <linux/of_gpio.h>
20 #include <linux/of_graph.h>
21 #include <linux/phy/phy.h>
22 #include <linux/platform_device.h>
23 #include <linux/regmap.h>
24 
25 #include <sound/hdmi-codec.h>
26 
27 #include <drm/drm_atomic_helper.h>
28 #include <drm/drm_bridge.h>
29 #include <drm/drm_crtc.h>
30 #include <drm/drm_edid.h>
31 #include <drm/drm_print.h>
32 #include <drm/drm_probe_helper.h>
33 
34 #include "mtk_cec.h"
35 #include "mtk_hdmi.h"
36 #include "mtk_hdmi_regs.h"
37 
38 #define NCTS_BYTES	7
39 
40 enum mtk_hdmi_clk_id {
41 	MTK_HDMI_CLK_HDMI_PIXEL,
42 	MTK_HDMI_CLK_HDMI_PLL,
43 	MTK_HDMI_CLK_AUD_BCLK,
44 	MTK_HDMI_CLK_AUD_SPDIF,
45 	MTK_HDMI_CLK_COUNT
46 };
47 
48 enum hdmi_aud_input_type {
49 	HDMI_AUD_INPUT_I2S = 0,
50 	HDMI_AUD_INPUT_SPDIF,
51 };
52 
53 enum hdmi_aud_i2s_fmt {
54 	HDMI_I2S_MODE_RJT_24BIT = 0,
55 	HDMI_I2S_MODE_RJT_16BIT,
56 	HDMI_I2S_MODE_LJT_24BIT,
57 	HDMI_I2S_MODE_LJT_16BIT,
58 	HDMI_I2S_MODE_I2S_24BIT,
59 	HDMI_I2S_MODE_I2S_16BIT
60 };
61 
62 enum hdmi_aud_mclk {
63 	HDMI_AUD_MCLK_128FS,
64 	HDMI_AUD_MCLK_192FS,
65 	HDMI_AUD_MCLK_256FS,
66 	HDMI_AUD_MCLK_384FS,
67 	HDMI_AUD_MCLK_512FS,
68 	HDMI_AUD_MCLK_768FS,
69 	HDMI_AUD_MCLK_1152FS,
70 };
71 
72 enum hdmi_aud_channel_type {
73 	HDMI_AUD_CHAN_TYPE_1_0 = 0,
74 	HDMI_AUD_CHAN_TYPE_1_1,
75 	HDMI_AUD_CHAN_TYPE_2_0,
76 	HDMI_AUD_CHAN_TYPE_2_1,
77 	HDMI_AUD_CHAN_TYPE_3_0,
78 	HDMI_AUD_CHAN_TYPE_3_1,
79 	HDMI_AUD_CHAN_TYPE_4_0,
80 	HDMI_AUD_CHAN_TYPE_4_1,
81 	HDMI_AUD_CHAN_TYPE_5_0,
82 	HDMI_AUD_CHAN_TYPE_5_1,
83 	HDMI_AUD_CHAN_TYPE_6_0,
84 	HDMI_AUD_CHAN_TYPE_6_1,
85 	HDMI_AUD_CHAN_TYPE_7_0,
86 	HDMI_AUD_CHAN_TYPE_7_1,
87 	HDMI_AUD_CHAN_TYPE_3_0_LRS,
88 	HDMI_AUD_CHAN_TYPE_3_1_LRS,
89 	HDMI_AUD_CHAN_TYPE_4_0_CLRS,
90 	HDMI_AUD_CHAN_TYPE_4_1_CLRS,
91 	HDMI_AUD_CHAN_TYPE_6_1_CS,
92 	HDMI_AUD_CHAN_TYPE_6_1_CH,
93 	HDMI_AUD_CHAN_TYPE_6_1_OH,
94 	HDMI_AUD_CHAN_TYPE_6_1_CHR,
95 	HDMI_AUD_CHAN_TYPE_7_1_LH_RH,
96 	HDMI_AUD_CHAN_TYPE_7_1_LSR_RSR,
97 	HDMI_AUD_CHAN_TYPE_7_1_LC_RC,
98 	HDMI_AUD_CHAN_TYPE_7_1_LW_RW,
99 	HDMI_AUD_CHAN_TYPE_7_1_LSD_RSD,
100 	HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS,
101 	HDMI_AUD_CHAN_TYPE_7_1_LHS_RHS,
102 	HDMI_AUD_CHAN_TYPE_7_1_CS_CH,
103 	HDMI_AUD_CHAN_TYPE_7_1_CS_OH,
104 	HDMI_AUD_CHAN_TYPE_7_1_CS_CHR,
105 	HDMI_AUD_CHAN_TYPE_7_1_CH_OH,
106 	HDMI_AUD_CHAN_TYPE_7_1_CH_CHR,
107 	HDMI_AUD_CHAN_TYPE_7_1_OH_CHR,
108 	HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS_LSR_RSR,
109 	HDMI_AUD_CHAN_TYPE_6_0_CS,
110 	HDMI_AUD_CHAN_TYPE_6_0_CH,
111 	HDMI_AUD_CHAN_TYPE_6_0_OH,
112 	HDMI_AUD_CHAN_TYPE_6_0_CHR,
113 	HDMI_AUD_CHAN_TYPE_7_0_LH_RH,
114 	HDMI_AUD_CHAN_TYPE_7_0_LSR_RSR,
115 	HDMI_AUD_CHAN_TYPE_7_0_LC_RC,
116 	HDMI_AUD_CHAN_TYPE_7_0_LW_RW,
117 	HDMI_AUD_CHAN_TYPE_7_0_LSD_RSD,
118 	HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS,
119 	HDMI_AUD_CHAN_TYPE_7_0_LHS_RHS,
120 	HDMI_AUD_CHAN_TYPE_7_0_CS_CH,
121 	HDMI_AUD_CHAN_TYPE_7_0_CS_OH,
122 	HDMI_AUD_CHAN_TYPE_7_0_CS_CHR,
123 	HDMI_AUD_CHAN_TYPE_7_0_CH_OH,
124 	HDMI_AUD_CHAN_TYPE_7_0_CH_CHR,
125 	HDMI_AUD_CHAN_TYPE_7_0_OH_CHR,
126 	HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS_LSR_RSR,
127 	HDMI_AUD_CHAN_TYPE_8_0_LH_RH_CS,
128 	HDMI_AUD_CHAN_TYPE_UNKNOWN = 0xFF
129 };
130 
131 enum hdmi_aud_channel_swap_type {
132 	HDMI_AUD_SWAP_LR,
133 	HDMI_AUD_SWAP_LFE_CC,
134 	HDMI_AUD_SWAP_LSRS,
135 	HDMI_AUD_SWAP_RLS_RRS,
136 	HDMI_AUD_SWAP_LR_STATUS,
137 };
138 
139 struct hdmi_audio_param {
140 	enum hdmi_audio_coding_type aud_codec;
141 	enum hdmi_audio_sample_size aud_sampe_size;
142 	enum hdmi_aud_input_type aud_input_type;
143 	enum hdmi_aud_i2s_fmt aud_i2s_fmt;
144 	enum hdmi_aud_mclk aud_mclk;
145 	enum hdmi_aud_channel_type aud_input_chan_type;
146 	struct hdmi_codec_params codec_params;
147 };
148 
149 struct mtk_hdmi_conf {
150 	bool tz_disabled;
151 	bool cea_modes_only;
152 	unsigned long max_mode_clock;
153 };
154 
155 struct mtk_hdmi {
156 	struct drm_bridge bridge;
157 	struct drm_bridge *next_bridge;
158 	struct drm_connector *curr_conn;/* current connector (only valid when 'enabled') */
159 	struct device *dev;
160 	const struct mtk_hdmi_conf *conf;
161 	struct phy *phy;
162 	struct device *cec_dev;
163 	struct i2c_adapter *ddc_adpt;
164 	struct clk *clk[MTK_HDMI_CLK_COUNT];
165 	struct drm_display_mode mode;
166 	bool dvi_mode;
167 	u32 min_clock;
168 	u32 max_clock;
169 	u32 max_hdisplay;
170 	u32 max_vdisplay;
171 	u32 ibias;
172 	u32 ibias_up;
173 	struct regmap *sys_regmap;
174 	unsigned int sys_offset;
175 	void __iomem *regs;
176 	enum hdmi_colorspace csp;
177 	struct hdmi_audio_param aud_param;
178 	bool audio_enable;
179 	bool powered;
180 	bool enabled;
181 	hdmi_codec_plugged_cb plugged_cb;
182 	struct device *codec_dev;
183 	struct mutex update_plugged_status_lock;
184 };
185 
186 static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b)
187 {
188 	return container_of(b, struct mtk_hdmi, bridge);
189 }
190 
191 static u32 mtk_hdmi_read(struct mtk_hdmi *hdmi, u32 offset)
192 {
193 	return readl(hdmi->regs + offset);
194 }
195 
196 static void mtk_hdmi_write(struct mtk_hdmi *hdmi, u32 offset, u32 val)
197 {
198 	writel(val, hdmi->regs + offset);
199 }
200 
201 static void mtk_hdmi_clear_bits(struct mtk_hdmi *hdmi, u32 offset, u32 bits)
202 {
203 	void __iomem *reg = hdmi->regs + offset;
204 	u32 tmp;
205 
206 	tmp = readl(reg);
207 	tmp &= ~bits;
208 	writel(tmp, reg);
209 }
210 
211 static void mtk_hdmi_set_bits(struct mtk_hdmi *hdmi, u32 offset, u32 bits)
212 {
213 	void __iomem *reg = hdmi->regs + offset;
214 	u32 tmp;
215 
216 	tmp = readl(reg);
217 	tmp |= bits;
218 	writel(tmp, reg);
219 }
220 
221 static void mtk_hdmi_mask(struct mtk_hdmi *hdmi, u32 offset, u32 val, u32 mask)
222 {
223 	void __iomem *reg = hdmi->regs + offset;
224 	u32 tmp;
225 
226 	tmp = readl(reg);
227 	tmp = (tmp & ~mask) | (val & mask);
228 	writel(tmp, reg);
229 }
230 
231 static void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, bool black)
232 {
233 	mtk_hdmi_mask(hdmi, VIDEO_CFG_4, black ? GEN_RGB : NORMAL_PATH,
234 		      VIDEO_SOURCE_SEL);
235 }
236 
237 static void mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi *hdmi, bool enable)
238 {
239 	struct arm_smccc_res res;
240 
241 	/*
242 	 * MT8173 HDMI hardware has an output control bit to enable/disable HDMI
243 	 * output. This bit can only be controlled in ARM supervisor mode.
244 	 * The ARM trusted firmware provides an API for the HDMI driver to set
245 	 * this control bit to enable HDMI output in supervisor mode.
246 	 */
247 	if (hdmi->conf && hdmi->conf->tz_disabled)
248 		regmap_update_bits(hdmi->sys_regmap,
249 				   hdmi->sys_offset + HDMI_SYS_CFG20,
250 				   0x80008005, enable ? 0x80000005 : 0x8000);
251 	else
252 		arm_smccc_smc(MTK_SIP_SET_AUTHORIZED_SECURE_REG, 0x14000904,
253 			      0x80000000, 0, 0, 0, 0, 0, &res);
254 
255 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
256 			   HDMI_PCLK_FREE_RUN, enable ? HDMI_PCLK_FREE_RUN : 0);
257 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C,
258 			   HDMI_ON | ANLG_ON, enable ? (HDMI_ON | ANLG_ON) : 0);
259 }
260 
261 static void mtk_hdmi_hw_1p4_version_enable(struct mtk_hdmi *hdmi, bool enable)
262 {
263 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
264 			   HDMI2P0_EN, enable ? 0 : HDMI2P0_EN);
265 }
266 
267 static void mtk_hdmi_hw_aud_mute(struct mtk_hdmi *hdmi)
268 {
269 	mtk_hdmi_set_bits(hdmi, GRL_AUDIO_CFG, AUDIO_ZERO);
270 }
271 
272 static void mtk_hdmi_hw_aud_unmute(struct mtk_hdmi *hdmi)
273 {
274 	mtk_hdmi_clear_bits(hdmi, GRL_AUDIO_CFG, AUDIO_ZERO);
275 }
276 
277 static void mtk_hdmi_hw_reset(struct mtk_hdmi *hdmi)
278 {
279 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C,
280 			   HDMI_RST, HDMI_RST);
281 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C,
282 			   HDMI_RST, 0);
283 	mtk_hdmi_clear_bits(hdmi, GRL_CFG3, CFG3_CONTROL_PACKET_DELAY);
284 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C,
285 			   ANLG_ON, ANLG_ON);
286 }
287 
288 static void mtk_hdmi_hw_enable_notice(struct mtk_hdmi *hdmi, bool enable_notice)
289 {
290 	mtk_hdmi_mask(hdmi, GRL_CFG2, enable_notice ? CFG2_NOTICE_EN : 0,
291 		      CFG2_NOTICE_EN);
292 }
293 
294 static void mtk_hdmi_hw_write_int_mask(struct mtk_hdmi *hdmi, u32 int_mask)
295 {
296 	mtk_hdmi_write(hdmi, GRL_INT_MASK, int_mask);
297 }
298 
299 static void mtk_hdmi_hw_enable_dvi_mode(struct mtk_hdmi *hdmi, bool enable)
300 {
301 	mtk_hdmi_mask(hdmi, GRL_CFG1, enable ? CFG1_DVI : 0, CFG1_DVI);
302 }
303 
304 static void mtk_hdmi_hw_send_info_frame(struct mtk_hdmi *hdmi, u8 *buffer,
305 					u8 len)
306 {
307 	u32 ctrl_reg = GRL_CTRL;
308 	int i;
309 	u8 *frame_data;
310 	enum hdmi_infoframe_type frame_type;
311 	u8 frame_ver;
312 	u8 frame_len;
313 	u8 checksum;
314 	int ctrl_frame_en = 0;
315 
316 	frame_type = *buffer++;
317 	frame_ver = *buffer++;
318 	frame_len = *buffer++;
319 	checksum = *buffer++;
320 	frame_data = buffer;
321 
322 	dev_dbg(hdmi->dev,
323 		"frame_type:0x%x,frame_ver:0x%x,frame_len:0x%x,checksum:0x%x\n",
324 		frame_type, frame_ver, frame_len, checksum);
325 
326 	switch (frame_type) {
327 	case HDMI_INFOFRAME_TYPE_AVI:
328 		ctrl_frame_en = CTRL_AVI_EN;
329 		ctrl_reg = GRL_CTRL;
330 		break;
331 	case HDMI_INFOFRAME_TYPE_SPD:
332 		ctrl_frame_en = CTRL_SPD_EN;
333 		ctrl_reg = GRL_CTRL;
334 		break;
335 	case HDMI_INFOFRAME_TYPE_AUDIO:
336 		ctrl_frame_en = CTRL_AUDIO_EN;
337 		ctrl_reg = GRL_CTRL;
338 		break;
339 	case HDMI_INFOFRAME_TYPE_VENDOR:
340 		ctrl_frame_en = VS_EN;
341 		ctrl_reg = GRL_ACP_ISRC_CTRL;
342 		break;
343 	default:
344 		dev_err(hdmi->dev, "Unknown infoframe type %d\n", frame_type);
345 		return;
346 	}
347 	mtk_hdmi_clear_bits(hdmi, ctrl_reg, ctrl_frame_en);
348 	mtk_hdmi_write(hdmi, GRL_INFOFRM_TYPE, frame_type);
349 	mtk_hdmi_write(hdmi, GRL_INFOFRM_VER, frame_ver);
350 	mtk_hdmi_write(hdmi, GRL_INFOFRM_LNG, frame_len);
351 
352 	mtk_hdmi_write(hdmi, GRL_IFM_PORT, checksum);
353 	for (i = 0; i < frame_len; i++)
354 		mtk_hdmi_write(hdmi, GRL_IFM_PORT, frame_data[i]);
355 
356 	mtk_hdmi_set_bits(hdmi, ctrl_reg, ctrl_frame_en);
357 }
358 
359 static void mtk_hdmi_hw_send_aud_packet(struct mtk_hdmi *hdmi, bool enable)
360 {
361 	mtk_hdmi_mask(hdmi, GRL_SHIFT_R2, enable ? 0 : AUDIO_PACKET_OFF,
362 		      AUDIO_PACKET_OFF);
363 }
364 
365 static void mtk_hdmi_hw_config_sys(struct mtk_hdmi *hdmi)
366 {
367 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
368 			   HDMI_OUT_FIFO_EN | MHL_MODE_ON, 0);
369 	usleep_range(2000, 4000);
370 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
371 			   HDMI_OUT_FIFO_EN | MHL_MODE_ON, HDMI_OUT_FIFO_EN);
372 }
373 
374 static void mtk_hdmi_hw_set_deep_color_mode(struct mtk_hdmi *hdmi)
375 {
376 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
377 			   DEEP_COLOR_MODE_MASK | DEEP_COLOR_EN,
378 			   COLOR_8BIT_MODE);
379 }
380 
381 static void mtk_hdmi_hw_send_av_mute(struct mtk_hdmi *hdmi)
382 {
383 	mtk_hdmi_clear_bits(hdmi, GRL_CFG4, CTRL_AVMUTE);
384 	usleep_range(2000, 4000);
385 	mtk_hdmi_set_bits(hdmi, GRL_CFG4, CTRL_AVMUTE);
386 }
387 
388 static void mtk_hdmi_hw_send_av_unmute(struct mtk_hdmi *hdmi)
389 {
390 	mtk_hdmi_mask(hdmi, GRL_CFG4, CFG4_AV_UNMUTE_EN,
391 		      CFG4_AV_UNMUTE_EN | CFG4_AV_UNMUTE_SET);
392 	usleep_range(2000, 4000);
393 	mtk_hdmi_mask(hdmi, GRL_CFG4, CFG4_AV_UNMUTE_SET,
394 		      CFG4_AV_UNMUTE_EN | CFG4_AV_UNMUTE_SET);
395 }
396 
397 static void mtk_hdmi_hw_ncts_enable(struct mtk_hdmi *hdmi, bool on)
398 {
399 	mtk_hdmi_mask(hdmi, GRL_CTS_CTRL, on ? 0 : CTS_CTRL_SOFT,
400 		      CTS_CTRL_SOFT);
401 }
402 
403 static void mtk_hdmi_hw_ncts_auto_write_enable(struct mtk_hdmi *hdmi,
404 					       bool enable)
405 {
406 	mtk_hdmi_mask(hdmi, GRL_CTS_CTRL, enable ? NCTS_WRI_ANYTIME : 0,
407 		      NCTS_WRI_ANYTIME);
408 }
409 
410 static void mtk_hdmi_hw_msic_setting(struct mtk_hdmi *hdmi,
411 				     struct drm_display_mode *mode)
412 {
413 	mtk_hdmi_clear_bits(hdmi, GRL_CFG4, CFG4_MHL_MODE);
414 
415 	if (mode->flags & DRM_MODE_FLAG_INTERLACE &&
416 	    mode->clock == 74250 &&
417 	    mode->vdisplay == 1080)
418 		mtk_hdmi_clear_bits(hdmi, GRL_CFG2, CFG2_MHL_DE_SEL);
419 	else
420 		mtk_hdmi_set_bits(hdmi, GRL_CFG2, CFG2_MHL_DE_SEL);
421 }
422 
423 static void mtk_hdmi_hw_aud_set_channel_swap(struct mtk_hdmi *hdmi,
424 					enum hdmi_aud_channel_swap_type swap)
425 {
426 	u8 swap_bit;
427 
428 	switch (swap) {
429 	case HDMI_AUD_SWAP_LR:
430 		swap_bit = LR_SWAP;
431 		break;
432 	case HDMI_AUD_SWAP_LFE_CC:
433 		swap_bit = LFE_CC_SWAP;
434 		break;
435 	case HDMI_AUD_SWAP_LSRS:
436 		swap_bit = LSRS_SWAP;
437 		break;
438 	case HDMI_AUD_SWAP_RLS_RRS:
439 		swap_bit = RLS_RRS_SWAP;
440 		break;
441 	case HDMI_AUD_SWAP_LR_STATUS:
442 		swap_bit = LR_STATUS_SWAP;
443 		break;
444 	default:
445 		swap_bit = LFE_CC_SWAP;
446 		break;
447 	}
448 	mtk_hdmi_mask(hdmi, GRL_CH_SWAP, swap_bit, 0xff);
449 }
450 
451 static void mtk_hdmi_hw_aud_set_bit_num(struct mtk_hdmi *hdmi,
452 					enum hdmi_audio_sample_size bit_num)
453 {
454 	u32 val;
455 
456 	switch (bit_num) {
457 	case HDMI_AUDIO_SAMPLE_SIZE_16:
458 		val = AOUT_16BIT;
459 		break;
460 	case HDMI_AUDIO_SAMPLE_SIZE_20:
461 		val = AOUT_20BIT;
462 		break;
463 	case HDMI_AUDIO_SAMPLE_SIZE_24:
464 	case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
465 		val = AOUT_24BIT;
466 		break;
467 	}
468 
469 	mtk_hdmi_mask(hdmi, GRL_AOUT_CFG, val, AOUT_BNUM_SEL_MASK);
470 }
471 
472 static void mtk_hdmi_hw_aud_set_i2s_fmt(struct mtk_hdmi *hdmi,
473 					enum hdmi_aud_i2s_fmt i2s_fmt)
474 {
475 	u32 val;
476 
477 	val = mtk_hdmi_read(hdmi, GRL_CFG0);
478 	val &= ~(CFG0_W_LENGTH_MASK | CFG0_I2S_MODE_MASK);
479 
480 	switch (i2s_fmt) {
481 	case HDMI_I2S_MODE_RJT_24BIT:
482 		val |= CFG0_I2S_MODE_RTJ | CFG0_W_LENGTH_24BIT;
483 		break;
484 	case HDMI_I2S_MODE_RJT_16BIT:
485 		val |= CFG0_I2S_MODE_RTJ | CFG0_W_LENGTH_16BIT;
486 		break;
487 	case HDMI_I2S_MODE_LJT_24BIT:
488 	default:
489 		val |= CFG0_I2S_MODE_LTJ | CFG0_W_LENGTH_24BIT;
490 		break;
491 	case HDMI_I2S_MODE_LJT_16BIT:
492 		val |= CFG0_I2S_MODE_LTJ | CFG0_W_LENGTH_16BIT;
493 		break;
494 	case HDMI_I2S_MODE_I2S_24BIT:
495 		val |= CFG0_I2S_MODE_I2S | CFG0_W_LENGTH_24BIT;
496 		break;
497 	case HDMI_I2S_MODE_I2S_16BIT:
498 		val |= CFG0_I2S_MODE_I2S | CFG0_W_LENGTH_16BIT;
499 		break;
500 	}
501 	mtk_hdmi_write(hdmi, GRL_CFG0, val);
502 }
503 
504 static void mtk_hdmi_hw_audio_config(struct mtk_hdmi *hdmi, bool dst)
505 {
506 	const u8 mask = HIGH_BIT_RATE | DST_NORMAL_DOUBLE | SACD_DST | DSD_SEL;
507 	u8 val;
508 
509 	/* Disable high bitrate, set DST packet normal/double */
510 	mtk_hdmi_clear_bits(hdmi, GRL_AOUT_CFG, HIGH_BIT_RATE_PACKET_ALIGN);
511 
512 	if (dst)
513 		val = DST_NORMAL_DOUBLE | SACD_DST;
514 	else
515 		val = 0;
516 
517 	mtk_hdmi_mask(hdmi, GRL_AUDIO_CFG, val, mask);
518 }
519 
520 static void mtk_hdmi_hw_aud_set_i2s_chan_num(struct mtk_hdmi *hdmi,
521 					enum hdmi_aud_channel_type channel_type,
522 					u8 channel_count)
523 {
524 	unsigned int ch_switch;
525 	u8 i2s_uv;
526 
527 	ch_switch = CH_SWITCH(7, 7) | CH_SWITCH(6, 6) |
528 		    CH_SWITCH(5, 5) | CH_SWITCH(4, 4) |
529 		    CH_SWITCH(3, 3) | CH_SWITCH(1, 2) |
530 		    CH_SWITCH(2, 1) | CH_SWITCH(0, 0);
531 
532 	if (channel_count == 2) {
533 		i2s_uv = I2S_UV_CH_EN(0);
534 	} else if (channel_count == 3 || channel_count == 4) {
535 		if (channel_count == 4 &&
536 		    (channel_type == HDMI_AUD_CHAN_TYPE_3_0_LRS ||
537 		    channel_type == HDMI_AUD_CHAN_TYPE_4_0))
538 			i2s_uv = I2S_UV_CH_EN(2) | I2S_UV_CH_EN(0);
539 		else
540 			i2s_uv = I2S_UV_CH_EN(3) | I2S_UV_CH_EN(2);
541 	} else if (channel_count == 6 || channel_count == 5) {
542 		if (channel_count == 6 &&
543 		    channel_type != HDMI_AUD_CHAN_TYPE_5_1 &&
544 		    channel_type != HDMI_AUD_CHAN_TYPE_4_1_CLRS) {
545 			i2s_uv = I2S_UV_CH_EN(3) | I2S_UV_CH_EN(2) |
546 				 I2S_UV_CH_EN(1) | I2S_UV_CH_EN(0);
547 		} else {
548 			i2s_uv = I2S_UV_CH_EN(2) | I2S_UV_CH_EN(1) |
549 				 I2S_UV_CH_EN(0);
550 		}
551 	} else if (channel_count == 8 || channel_count == 7) {
552 		i2s_uv = I2S_UV_CH_EN(3) | I2S_UV_CH_EN(2) |
553 			 I2S_UV_CH_EN(1) | I2S_UV_CH_EN(0);
554 	} else {
555 		i2s_uv = I2S_UV_CH_EN(0);
556 	}
557 
558 	mtk_hdmi_write(hdmi, GRL_CH_SW0, ch_switch & 0xff);
559 	mtk_hdmi_write(hdmi, GRL_CH_SW1, (ch_switch >> 8) & 0xff);
560 	mtk_hdmi_write(hdmi, GRL_CH_SW2, (ch_switch >> 16) & 0xff);
561 	mtk_hdmi_write(hdmi, GRL_I2S_UV, i2s_uv);
562 }
563 
564 static void mtk_hdmi_hw_aud_set_input_type(struct mtk_hdmi *hdmi,
565 					   enum hdmi_aud_input_type input_type)
566 {
567 	u32 val;
568 
569 	val = mtk_hdmi_read(hdmi, GRL_CFG1);
570 	if (input_type == HDMI_AUD_INPUT_I2S &&
571 	    (val & CFG1_SPDIF) == CFG1_SPDIF) {
572 		val &= ~CFG1_SPDIF;
573 	} else if (input_type == HDMI_AUD_INPUT_SPDIF &&
574 		(val & CFG1_SPDIF) == 0) {
575 		val |= CFG1_SPDIF;
576 	}
577 	mtk_hdmi_write(hdmi, GRL_CFG1, val);
578 }
579 
580 static void mtk_hdmi_hw_aud_set_channel_status(struct mtk_hdmi *hdmi,
581 					       u8 *channel_status)
582 {
583 	int i;
584 
585 	for (i = 0; i < 5; i++) {
586 		mtk_hdmi_write(hdmi, GRL_I2S_C_STA0 + i * 4, channel_status[i]);
587 		mtk_hdmi_write(hdmi, GRL_L_STATUS_0 + i * 4, channel_status[i]);
588 		mtk_hdmi_write(hdmi, GRL_R_STATUS_0 + i * 4, channel_status[i]);
589 	}
590 	for (; i < 24; i++) {
591 		mtk_hdmi_write(hdmi, GRL_L_STATUS_0 + i * 4, 0);
592 		mtk_hdmi_write(hdmi, GRL_R_STATUS_0 + i * 4, 0);
593 	}
594 }
595 
596 static void mtk_hdmi_hw_aud_src_reenable(struct mtk_hdmi *hdmi)
597 {
598 	u32 val;
599 
600 	val = mtk_hdmi_read(hdmi, GRL_MIX_CTRL);
601 	if (val & MIX_CTRL_SRC_EN) {
602 		val &= ~MIX_CTRL_SRC_EN;
603 		mtk_hdmi_write(hdmi, GRL_MIX_CTRL, val);
604 		usleep_range(255, 512);
605 		val |= MIX_CTRL_SRC_EN;
606 		mtk_hdmi_write(hdmi, GRL_MIX_CTRL, val);
607 	}
608 }
609 
610 static void mtk_hdmi_hw_aud_src_disable(struct mtk_hdmi *hdmi)
611 {
612 	u32 val;
613 
614 	val = mtk_hdmi_read(hdmi, GRL_MIX_CTRL);
615 	val &= ~MIX_CTRL_SRC_EN;
616 	mtk_hdmi_write(hdmi, GRL_MIX_CTRL, val);
617 	mtk_hdmi_write(hdmi, GRL_SHIFT_L1, 0x00);
618 }
619 
620 static void mtk_hdmi_hw_aud_set_mclk(struct mtk_hdmi *hdmi,
621 				     enum hdmi_aud_mclk mclk)
622 {
623 	u32 val;
624 
625 	val = mtk_hdmi_read(hdmi, GRL_CFG5);
626 	val &= CFG5_CD_RATIO_MASK;
627 
628 	switch (mclk) {
629 	case HDMI_AUD_MCLK_128FS:
630 		val |= CFG5_FS128;
631 		break;
632 	case HDMI_AUD_MCLK_256FS:
633 		val |= CFG5_FS256;
634 		break;
635 	case HDMI_AUD_MCLK_384FS:
636 		val |= CFG5_FS384;
637 		break;
638 	case HDMI_AUD_MCLK_512FS:
639 		val |= CFG5_FS512;
640 		break;
641 	case HDMI_AUD_MCLK_768FS:
642 		val |= CFG5_FS768;
643 		break;
644 	default:
645 		val |= CFG5_FS256;
646 		break;
647 	}
648 	mtk_hdmi_write(hdmi, GRL_CFG5, val);
649 }
650 
651 struct hdmi_acr_n {
652 	unsigned int clock;
653 	unsigned int n[3];
654 };
655 
656 /* Recommended N values from HDMI specification, tables 7-1 to 7-3 */
657 static const struct hdmi_acr_n hdmi_rec_n_table[] = {
658 	/* Clock, N: 32kHz 44.1kHz 48kHz */
659 	{  25175, {  4576,  7007,  6864 } },
660 	{  74176, { 11648, 17836, 11648 } },
661 	{ 148352, { 11648,  8918,  5824 } },
662 	{ 296703, {  5824,  4459,  5824 } },
663 	{ 297000, {  3072,  4704,  5120 } },
664 	{      0, {  4096,  6272,  6144 } }, /* all other TMDS clocks */
665 };
666 
667 /**
668  * hdmi_recommended_n() - Return N value recommended by HDMI specification
669  * @freq: audio sample rate in Hz
670  * @clock: rounded TMDS clock in kHz
671  */
672 static unsigned int hdmi_recommended_n(unsigned int freq, unsigned int clock)
673 {
674 	const struct hdmi_acr_n *recommended;
675 	unsigned int i;
676 
677 	for (i = 0; i < ARRAY_SIZE(hdmi_rec_n_table) - 1; i++) {
678 		if (clock == hdmi_rec_n_table[i].clock)
679 			break;
680 	}
681 	recommended = hdmi_rec_n_table + i;
682 
683 	switch (freq) {
684 	case 32000:
685 		return recommended->n[0];
686 	case 44100:
687 		return recommended->n[1];
688 	case 48000:
689 		return recommended->n[2];
690 	case 88200:
691 		return recommended->n[1] * 2;
692 	case 96000:
693 		return recommended->n[2] * 2;
694 	case 176400:
695 		return recommended->n[1] * 4;
696 	case 192000:
697 		return recommended->n[2] * 4;
698 	default:
699 		return (128 * freq) / 1000;
700 	}
701 }
702 
703 static unsigned int hdmi_mode_clock_to_hz(unsigned int clock)
704 {
705 	switch (clock) {
706 	case 25175:
707 		return 25174825;	/* 25.2/1.001 MHz */
708 	case 74176:
709 		return 74175824;	/* 74.25/1.001 MHz */
710 	case 148352:
711 		return 148351648;	/* 148.5/1.001 MHz */
712 	case 296703:
713 		return 296703297;	/* 297/1.001 MHz */
714 	default:
715 		return clock * 1000;
716 	}
717 }
718 
719 static unsigned int hdmi_expected_cts(unsigned int audio_sample_rate,
720 				      unsigned int tmds_clock, unsigned int n)
721 {
722 	return DIV_ROUND_CLOSEST_ULL((u64)hdmi_mode_clock_to_hz(tmds_clock) * n,
723 				     128 * audio_sample_rate);
724 }
725 
726 static void do_hdmi_hw_aud_set_ncts(struct mtk_hdmi *hdmi, unsigned int n,
727 				    unsigned int cts)
728 {
729 	unsigned char val[NCTS_BYTES];
730 	int i;
731 
732 	mtk_hdmi_write(hdmi, GRL_NCTS, 0);
733 	mtk_hdmi_write(hdmi, GRL_NCTS, 0);
734 	mtk_hdmi_write(hdmi, GRL_NCTS, 0);
735 	memset(val, 0, sizeof(val));
736 
737 	val[0] = (cts >> 24) & 0xff;
738 	val[1] = (cts >> 16) & 0xff;
739 	val[2] = (cts >> 8) & 0xff;
740 	val[3] = cts & 0xff;
741 
742 	val[4] = (n >> 16) & 0xff;
743 	val[5] = (n >> 8) & 0xff;
744 	val[6] = n & 0xff;
745 
746 	for (i = 0; i < NCTS_BYTES; i++)
747 		mtk_hdmi_write(hdmi, GRL_NCTS, val[i]);
748 }
749 
750 static void mtk_hdmi_hw_aud_set_ncts(struct mtk_hdmi *hdmi,
751 				     unsigned int sample_rate,
752 				     unsigned int clock)
753 {
754 	unsigned int n, cts;
755 
756 	n = hdmi_recommended_n(sample_rate, clock);
757 	cts = hdmi_expected_cts(sample_rate, clock, n);
758 
759 	dev_dbg(hdmi->dev, "%s: sample_rate=%u, clock=%d, cts=%u, n=%u\n",
760 		__func__, sample_rate, clock, n, cts);
761 
762 	mtk_hdmi_mask(hdmi, DUMMY_304, AUDIO_I2S_NCTS_SEL_64,
763 		      AUDIO_I2S_NCTS_SEL);
764 	do_hdmi_hw_aud_set_ncts(hdmi, n, cts);
765 }
766 
767 static u8 mtk_hdmi_aud_get_chnl_count(enum hdmi_aud_channel_type channel_type)
768 {
769 	switch (channel_type) {
770 	case HDMI_AUD_CHAN_TYPE_1_0:
771 	case HDMI_AUD_CHAN_TYPE_1_1:
772 	case HDMI_AUD_CHAN_TYPE_2_0:
773 		return 2;
774 	case HDMI_AUD_CHAN_TYPE_2_1:
775 	case HDMI_AUD_CHAN_TYPE_3_0:
776 		return 3;
777 	case HDMI_AUD_CHAN_TYPE_3_1:
778 	case HDMI_AUD_CHAN_TYPE_4_0:
779 	case HDMI_AUD_CHAN_TYPE_3_0_LRS:
780 		return 4;
781 	case HDMI_AUD_CHAN_TYPE_4_1:
782 	case HDMI_AUD_CHAN_TYPE_5_0:
783 	case HDMI_AUD_CHAN_TYPE_3_1_LRS:
784 	case HDMI_AUD_CHAN_TYPE_4_0_CLRS:
785 		return 5;
786 	case HDMI_AUD_CHAN_TYPE_5_1:
787 	case HDMI_AUD_CHAN_TYPE_6_0:
788 	case HDMI_AUD_CHAN_TYPE_4_1_CLRS:
789 	case HDMI_AUD_CHAN_TYPE_6_0_CS:
790 	case HDMI_AUD_CHAN_TYPE_6_0_CH:
791 	case HDMI_AUD_CHAN_TYPE_6_0_OH:
792 	case HDMI_AUD_CHAN_TYPE_6_0_CHR:
793 		return 6;
794 	case HDMI_AUD_CHAN_TYPE_6_1:
795 	case HDMI_AUD_CHAN_TYPE_6_1_CS:
796 	case HDMI_AUD_CHAN_TYPE_6_1_CH:
797 	case HDMI_AUD_CHAN_TYPE_6_1_OH:
798 	case HDMI_AUD_CHAN_TYPE_6_1_CHR:
799 	case HDMI_AUD_CHAN_TYPE_7_0:
800 	case HDMI_AUD_CHAN_TYPE_7_0_LH_RH:
801 	case HDMI_AUD_CHAN_TYPE_7_0_LSR_RSR:
802 	case HDMI_AUD_CHAN_TYPE_7_0_LC_RC:
803 	case HDMI_AUD_CHAN_TYPE_7_0_LW_RW:
804 	case HDMI_AUD_CHAN_TYPE_7_0_LSD_RSD:
805 	case HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS:
806 	case HDMI_AUD_CHAN_TYPE_7_0_LHS_RHS:
807 	case HDMI_AUD_CHAN_TYPE_7_0_CS_CH:
808 	case HDMI_AUD_CHAN_TYPE_7_0_CS_OH:
809 	case HDMI_AUD_CHAN_TYPE_7_0_CS_CHR:
810 	case HDMI_AUD_CHAN_TYPE_7_0_CH_OH:
811 	case HDMI_AUD_CHAN_TYPE_7_0_CH_CHR:
812 	case HDMI_AUD_CHAN_TYPE_7_0_OH_CHR:
813 	case HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS_LSR_RSR:
814 	case HDMI_AUD_CHAN_TYPE_8_0_LH_RH_CS:
815 		return 7;
816 	case HDMI_AUD_CHAN_TYPE_7_1:
817 	case HDMI_AUD_CHAN_TYPE_7_1_LH_RH:
818 	case HDMI_AUD_CHAN_TYPE_7_1_LSR_RSR:
819 	case HDMI_AUD_CHAN_TYPE_7_1_LC_RC:
820 	case HDMI_AUD_CHAN_TYPE_7_1_LW_RW:
821 	case HDMI_AUD_CHAN_TYPE_7_1_LSD_RSD:
822 	case HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS:
823 	case HDMI_AUD_CHAN_TYPE_7_1_LHS_RHS:
824 	case HDMI_AUD_CHAN_TYPE_7_1_CS_CH:
825 	case HDMI_AUD_CHAN_TYPE_7_1_CS_OH:
826 	case HDMI_AUD_CHAN_TYPE_7_1_CS_CHR:
827 	case HDMI_AUD_CHAN_TYPE_7_1_CH_OH:
828 	case HDMI_AUD_CHAN_TYPE_7_1_CH_CHR:
829 	case HDMI_AUD_CHAN_TYPE_7_1_OH_CHR:
830 	case HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS_LSR_RSR:
831 		return 8;
832 	default:
833 		return 2;
834 	}
835 }
836 
837 static int mtk_hdmi_video_change_vpll(struct mtk_hdmi *hdmi, u32 clock)
838 {
839 	unsigned long rate;
840 	int ret;
841 
842 	/* The DPI driver already should have set TVDPLL to the correct rate */
843 	ret = clk_set_rate(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL], clock);
844 	if (ret) {
845 		dev_err(hdmi->dev, "Failed to set PLL to %u Hz: %d\n", clock,
846 			ret);
847 		return ret;
848 	}
849 
850 	rate = clk_get_rate(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL]);
851 
852 	if (DIV_ROUND_CLOSEST(rate, 1000) != DIV_ROUND_CLOSEST(clock, 1000))
853 		dev_warn(hdmi->dev, "Want PLL %u Hz, got %lu Hz\n", clock,
854 			 rate);
855 	else
856 		dev_dbg(hdmi->dev, "Want PLL %u Hz, got %lu Hz\n", clock, rate);
857 
858 	mtk_hdmi_hw_config_sys(hdmi);
859 	mtk_hdmi_hw_set_deep_color_mode(hdmi);
860 	return 0;
861 }
862 
863 static void mtk_hdmi_video_set_display_mode(struct mtk_hdmi *hdmi,
864 					    struct drm_display_mode *mode)
865 {
866 	mtk_hdmi_hw_reset(hdmi);
867 	mtk_hdmi_hw_enable_notice(hdmi, true);
868 	mtk_hdmi_hw_write_int_mask(hdmi, 0xff);
869 	mtk_hdmi_hw_enable_dvi_mode(hdmi, hdmi->dvi_mode);
870 	mtk_hdmi_hw_ncts_auto_write_enable(hdmi, true);
871 
872 	mtk_hdmi_hw_msic_setting(hdmi, mode);
873 }
874 
875 
876 static void mtk_hdmi_aud_set_input(struct mtk_hdmi *hdmi)
877 {
878 	enum hdmi_aud_channel_type chan_type;
879 	u8 chan_count;
880 	bool dst;
881 
882 	mtk_hdmi_hw_aud_set_channel_swap(hdmi, HDMI_AUD_SWAP_LFE_CC);
883 	mtk_hdmi_set_bits(hdmi, GRL_MIX_CTRL, MIX_CTRL_FLAT);
884 
885 	if (hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_SPDIF &&
886 	    hdmi->aud_param.aud_codec == HDMI_AUDIO_CODING_TYPE_DST) {
887 		mtk_hdmi_hw_aud_set_bit_num(hdmi, HDMI_AUDIO_SAMPLE_SIZE_24);
888 	} else if (hdmi->aud_param.aud_i2s_fmt == HDMI_I2S_MODE_LJT_24BIT) {
889 		hdmi->aud_param.aud_i2s_fmt = HDMI_I2S_MODE_LJT_16BIT;
890 	}
891 
892 	mtk_hdmi_hw_aud_set_i2s_fmt(hdmi, hdmi->aud_param.aud_i2s_fmt);
893 	mtk_hdmi_hw_aud_set_bit_num(hdmi, HDMI_AUDIO_SAMPLE_SIZE_24);
894 
895 	dst = ((hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_SPDIF) &&
896 	       (hdmi->aud_param.aud_codec == HDMI_AUDIO_CODING_TYPE_DST));
897 	mtk_hdmi_hw_audio_config(hdmi, dst);
898 
899 	if (hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_SPDIF)
900 		chan_type = HDMI_AUD_CHAN_TYPE_2_0;
901 	else
902 		chan_type = hdmi->aud_param.aud_input_chan_type;
903 	chan_count = mtk_hdmi_aud_get_chnl_count(chan_type);
904 	mtk_hdmi_hw_aud_set_i2s_chan_num(hdmi, chan_type, chan_count);
905 	mtk_hdmi_hw_aud_set_input_type(hdmi, hdmi->aud_param.aud_input_type);
906 }
907 
908 static int mtk_hdmi_aud_set_src(struct mtk_hdmi *hdmi,
909 				struct drm_display_mode *display_mode)
910 {
911 	unsigned int sample_rate = hdmi->aud_param.codec_params.sample_rate;
912 
913 	mtk_hdmi_hw_ncts_enable(hdmi, false);
914 	mtk_hdmi_hw_aud_src_disable(hdmi);
915 	mtk_hdmi_clear_bits(hdmi, GRL_CFG2, CFG2_ACLK_INV);
916 
917 	if (hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_I2S) {
918 		switch (sample_rate) {
919 		case 32000:
920 		case 44100:
921 		case 48000:
922 		case 88200:
923 		case 96000:
924 			break;
925 		default:
926 			return -EINVAL;
927 		}
928 		mtk_hdmi_hw_aud_set_mclk(hdmi, hdmi->aud_param.aud_mclk);
929 	} else {
930 		switch (sample_rate) {
931 		case 32000:
932 		case 44100:
933 		case 48000:
934 			break;
935 		default:
936 			return -EINVAL;
937 		}
938 		mtk_hdmi_hw_aud_set_mclk(hdmi, HDMI_AUD_MCLK_128FS);
939 	}
940 
941 	mtk_hdmi_hw_aud_set_ncts(hdmi, sample_rate, display_mode->clock);
942 
943 	mtk_hdmi_hw_aud_src_reenable(hdmi);
944 	return 0;
945 }
946 
947 static int mtk_hdmi_aud_output_config(struct mtk_hdmi *hdmi,
948 				      struct drm_display_mode *display_mode)
949 {
950 	mtk_hdmi_hw_aud_mute(hdmi);
951 	mtk_hdmi_hw_send_aud_packet(hdmi, false);
952 
953 	mtk_hdmi_aud_set_input(hdmi);
954 	mtk_hdmi_aud_set_src(hdmi, display_mode);
955 	mtk_hdmi_hw_aud_set_channel_status(hdmi,
956 			hdmi->aud_param.codec_params.iec.status);
957 
958 	usleep_range(50, 100);
959 
960 	mtk_hdmi_hw_ncts_enable(hdmi, true);
961 	mtk_hdmi_hw_send_aud_packet(hdmi, true);
962 	mtk_hdmi_hw_aud_unmute(hdmi);
963 	return 0;
964 }
965 
966 static int mtk_hdmi_setup_avi_infoframe(struct mtk_hdmi *hdmi,
967 					struct drm_display_mode *mode)
968 {
969 	struct hdmi_avi_infoframe frame;
970 	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
971 	ssize_t err;
972 
973 	err = drm_hdmi_avi_infoframe_from_display_mode(&frame,
974 						       hdmi->curr_conn, mode);
975 	if (err < 0) {
976 		dev_err(hdmi->dev,
977 			"Failed to get AVI infoframe from mode: %zd\n", err);
978 		return err;
979 	}
980 
981 	err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
982 	if (err < 0) {
983 		dev_err(hdmi->dev, "Failed to pack AVI infoframe: %zd\n", err);
984 		return err;
985 	}
986 
987 	mtk_hdmi_hw_send_info_frame(hdmi, buffer, sizeof(buffer));
988 	return 0;
989 }
990 
991 static int mtk_hdmi_setup_spd_infoframe(struct mtk_hdmi *hdmi,
992 					const char *vendor,
993 					const char *product)
994 {
995 	struct hdmi_spd_infoframe frame;
996 	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_SPD_INFOFRAME_SIZE];
997 	ssize_t err;
998 
999 	err = hdmi_spd_infoframe_init(&frame, vendor, product);
1000 	if (err < 0) {
1001 		dev_err(hdmi->dev, "Failed to initialize SPD infoframe: %zd\n",
1002 			err);
1003 		return err;
1004 	}
1005 
1006 	err = hdmi_spd_infoframe_pack(&frame, buffer, sizeof(buffer));
1007 	if (err < 0) {
1008 		dev_err(hdmi->dev, "Failed to pack SDP infoframe: %zd\n", err);
1009 		return err;
1010 	}
1011 
1012 	mtk_hdmi_hw_send_info_frame(hdmi, buffer, sizeof(buffer));
1013 	return 0;
1014 }
1015 
1016 static int mtk_hdmi_setup_audio_infoframe(struct mtk_hdmi *hdmi)
1017 {
1018 	struct hdmi_audio_infoframe frame;
1019 	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
1020 	ssize_t err;
1021 
1022 	err = hdmi_audio_infoframe_init(&frame);
1023 	if (err < 0) {
1024 		dev_err(hdmi->dev, "Failed to setup audio infoframe: %zd\n",
1025 			err);
1026 		return err;
1027 	}
1028 
1029 	frame.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
1030 	frame.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
1031 	frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
1032 	frame.channels = mtk_hdmi_aud_get_chnl_count(
1033 					hdmi->aud_param.aud_input_chan_type);
1034 
1035 	err = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
1036 	if (err < 0) {
1037 		dev_err(hdmi->dev, "Failed to pack audio infoframe: %zd\n",
1038 			err);
1039 		return err;
1040 	}
1041 
1042 	mtk_hdmi_hw_send_info_frame(hdmi, buffer, sizeof(buffer));
1043 	return 0;
1044 }
1045 
1046 static int mtk_hdmi_setup_vendor_specific_infoframe(struct mtk_hdmi *hdmi,
1047 						struct drm_display_mode *mode)
1048 {
1049 	struct hdmi_vendor_infoframe frame;
1050 	u8 buffer[10];
1051 	ssize_t err;
1052 
1053 	err = drm_hdmi_vendor_infoframe_from_display_mode(&frame,
1054 							  hdmi->curr_conn, mode);
1055 	if (err) {
1056 		dev_err(hdmi->dev,
1057 			"Failed to get vendor infoframe from mode: %zd\n", err);
1058 		return err;
1059 	}
1060 
1061 	err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer));
1062 	if (err < 0) {
1063 		dev_err(hdmi->dev, "Failed to pack vendor infoframe: %zd\n",
1064 			err);
1065 		return err;
1066 	}
1067 
1068 	mtk_hdmi_hw_send_info_frame(hdmi, buffer, sizeof(buffer));
1069 	return 0;
1070 }
1071 
1072 static int mtk_hdmi_output_init(struct mtk_hdmi *hdmi)
1073 {
1074 	struct hdmi_audio_param *aud_param = &hdmi->aud_param;
1075 
1076 	hdmi->csp = HDMI_COLORSPACE_RGB;
1077 	aud_param->aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
1078 	aud_param->aud_sampe_size = HDMI_AUDIO_SAMPLE_SIZE_16;
1079 	aud_param->aud_input_type = HDMI_AUD_INPUT_I2S;
1080 	aud_param->aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
1081 	aud_param->aud_mclk = HDMI_AUD_MCLK_128FS;
1082 	aud_param->aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
1083 
1084 	return 0;
1085 }
1086 
1087 static void mtk_hdmi_audio_enable(struct mtk_hdmi *hdmi)
1088 {
1089 	mtk_hdmi_hw_send_aud_packet(hdmi, true);
1090 	hdmi->audio_enable = true;
1091 }
1092 
1093 static void mtk_hdmi_audio_disable(struct mtk_hdmi *hdmi)
1094 {
1095 	mtk_hdmi_hw_send_aud_packet(hdmi, false);
1096 	hdmi->audio_enable = false;
1097 }
1098 
1099 static int mtk_hdmi_audio_set_param(struct mtk_hdmi *hdmi,
1100 				    struct hdmi_audio_param *param)
1101 {
1102 	if (!hdmi->audio_enable) {
1103 		dev_err(hdmi->dev, "hdmi audio is in disable state!\n");
1104 		return -EINVAL;
1105 	}
1106 	dev_dbg(hdmi->dev, "codec:%d, input:%d, channel:%d, fs:%d\n",
1107 		param->aud_codec, param->aud_input_type,
1108 		param->aud_input_chan_type, param->codec_params.sample_rate);
1109 	memcpy(&hdmi->aud_param, param, sizeof(*param));
1110 	return mtk_hdmi_aud_output_config(hdmi, &hdmi->mode);
1111 }
1112 
1113 static int mtk_hdmi_output_set_display_mode(struct mtk_hdmi *hdmi,
1114 					    struct drm_display_mode *mode)
1115 {
1116 	int ret;
1117 
1118 	mtk_hdmi_hw_vid_black(hdmi, true);
1119 	mtk_hdmi_hw_aud_mute(hdmi);
1120 	mtk_hdmi_hw_send_av_mute(hdmi);
1121 	phy_power_off(hdmi->phy);
1122 
1123 	ret = mtk_hdmi_video_change_vpll(hdmi,
1124 					 mode->clock * 1000);
1125 	if (ret) {
1126 		dev_err(hdmi->dev, "Failed to set vpll: %d\n", ret);
1127 		return ret;
1128 	}
1129 	mtk_hdmi_video_set_display_mode(hdmi, mode);
1130 
1131 	phy_power_on(hdmi->phy);
1132 	mtk_hdmi_aud_output_config(hdmi, mode);
1133 
1134 	mtk_hdmi_hw_vid_black(hdmi, false);
1135 	mtk_hdmi_hw_aud_unmute(hdmi);
1136 	mtk_hdmi_hw_send_av_unmute(hdmi);
1137 
1138 	return 0;
1139 }
1140 
1141 static const char * const mtk_hdmi_clk_names[MTK_HDMI_CLK_COUNT] = {
1142 	[MTK_HDMI_CLK_HDMI_PIXEL] = "pixel",
1143 	[MTK_HDMI_CLK_HDMI_PLL] = "pll",
1144 	[MTK_HDMI_CLK_AUD_BCLK] = "bclk",
1145 	[MTK_HDMI_CLK_AUD_SPDIF] = "spdif",
1146 };
1147 
1148 static int mtk_hdmi_get_all_clk(struct mtk_hdmi *hdmi,
1149 				struct device_node *np)
1150 {
1151 	int i;
1152 
1153 	for (i = 0; i < ARRAY_SIZE(mtk_hdmi_clk_names); i++) {
1154 		hdmi->clk[i] = of_clk_get_by_name(np,
1155 						  mtk_hdmi_clk_names[i]);
1156 		if (IS_ERR(hdmi->clk[i]))
1157 			return PTR_ERR(hdmi->clk[i]);
1158 	}
1159 	return 0;
1160 }
1161 
1162 static int mtk_hdmi_clk_enable_audio(struct mtk_hdmi *hdmi)
1163 {
1164 	int ret;
1165 
1166 	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_AUD_BCLK]);
1167 	if (ret)
1168 		return ret;
1169 
1170 	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]);
1171 	if (ret)
1172 		goto err;
1173 
1174 	return 0;
1175 err:
1176 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_BCLK]);
1177 	return ret;
1178 }
1179 
1180 static void mtk_hdmi_clk_disable_audio(struct mtk_hdmi *hdmi)
1181 {
1182 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_BCLK]);
1183 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]);
1184 }
1185 
1186 static enum drm_connector_status
1187 mtk_hdmi_update_plugged_status(struct mtk_hdmi *hdmi)
1188 {
1189 	bool connected;
1190 
1191 	mutex_lock(&hdmi->update_plugged_status_lock);
1192 	connected = mtk_cec_hpd_high(hdmi->cec_dev);
1193 	if (hdmi->plugged_cb && hdmi->codec_dev)
1194 		hdmi->plugged_cb(hdmi->codec_dev, connected);
1195 	mutex_unlock(&hdmi->update_plugged_status_lock);
1196 
1197 	return connected ?
1198 	       connector_status_connected : connector_status_disconnected;
1199 }
1200 
1201 static enum drm_connector_status mtk_hdmi_detect(struct mtk_hdmi *hdmi)
1202 {
1203 	return mtk_hdmi_update_plugged_status(hdmi);
1204 }
1205 
1206 static int mtk_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
1207 				      const struct drm_display_info *info,
1208 				      const struct drm_display_mode *mode)
1209 {
1210 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1211 	struct drm_bridge *next_bridge;
1212 
1213 	dev_dbg(hdmi->dev, "xres=%d, yres=%d, refresh=%d, intl=%d clock=%d\n",
1214 		mode->hdisplay, mode->vdisplay, drm_mode_vrefresh(mode),
1215 		!!(mode->flags & DRM_MODE_FLAG_INTERLACE), mode->clock * 1000);
1216 
1217 	next_bridge = drm_bridge_get_next_bridge(&hdmi->bridge);
1218 	if (next_bridge) {
1219 		struct drm_display_mode adjusted_mode;
1220 
1221 		drm_mode_copy(&adjusted_mode, mode);
1222 		if (!drm_bridge_chain_mode_fixup(next_bridge, mode,
1223 						 &adjusted_mode))
1224 			return MODE_BAD;
1225 	}
1226 
1227 	if (hdmi->conf->cea_modes_only && !drm_match_cea_mode(mode))
1228 		return MODE_BAD;
1229 
1230 	if (hdmi->conf->max_mode_clock &&
1231 	    mode->clock > hdmi->conf->max_mode_clock)
1232 		return MODE_CLOCK_HIGH;
1233 
1234 	if (mode->clock < 27000)
1235 		return MODE_CLOCK_LOW;
1236 	if (mode->clock > 297000)
1237 		return MODE_CLOCK_HIGH;
1238 
1239 	return drm_mode_validate_size(mode, 0x1fff, 0x1fff);
1240 }
1241 
1242 static void mtk_hdmi_hpd_event(bool hpd, struct device *dev)
1243 {
1244 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1245 
1246 	if (hdmi && hdmi->bridge.encoder && hdmi->bridge.encoder->dev) {
1247 		static enum drm_connector_status status;
1248 
1249 		status = mtk_hdmi_detect(hdmi);
1250 		drm_helper_hpd_irq_event(hdmi->bridge.encoder->dev);
1251 		drm_bridge_hpd_notify(&hdmi->bridge, status);
1252 	}
1253 }
1254 
1255 /*
1256  * Bridge callbacks
1257  */
1258 
1259 static enum drm_connector_status mtk_hdmi_bridge_detect(struct drm_bridge *bridge)
1260 {
1261 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1262 
1263 	return mtk_hdmi_detect(hdmi);
1264 }
1265 
1266 static struct edid *mtk_hdmi_bridge_get_edid(struct drm_bridge *bridge,
1267 					     struct drm_connector *connector)
1268 {
1269 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1270 	struct edid *edid;
1271 
1272 	if (!hdmi->ddc_adpt)
1273 		return NULL;
1274 	edid = drm_get_edid(connector, hdmi->ddc_adpt);
1275 	if (!edid)
1276 		return NULL;
1277 	hdmi->dvi_mode = !drm_detect_monitor_audio(edid);
1278 	return edid;
1279 }
1280 
1281 static int mtk_hdmi_bridge_attach(struct drm_bridge *bridge,
1282 				  enum drm_bridge_attach_flags flags)
1283 {
1284 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1285 	int ret;
1286 
1287 	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
1288 		DRM_ERROR("%s: The flag DRM_BRIDGE_ATTACH_NO_CONNECTOR must be supplied\n",
1289 			  __func__);
1290 		return -EINVAL;
1291 	}
1292 
1293 	if (hdmi->next_bridge) {
1294 		ret = drm_bridge_attach(bridge->encoder, hdmi->next_bridge,
1295 					bridge, flags);
1296 		if (ret)
1297 			return ret;
1298 	}
1299 
1300 	mtk_cec_set_hpd_event(hdmi->cec_dev, mtk_hdmi_hpd_event, hdmi->dev);
1301 
1302 	return 0;
1303 }
1304 
1305 static bool mtk_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
1306 				       const struct drm_display_mode *mode,
1307 				       struct drm_display_mode *adjusted_mode)
1308 {
1309 	return true;
1310 }
1311 
1312 static void mtk_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
1313 					   struct drm_bridge_state *old_bridge_state)
1314 {
1315 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1316 
1317 	if (!hdmi->enabled)
1318 		return;
1319 
1320 	phy_power_off(hdmi->phy);
1321 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_HDMI_PIXEL]);
1322 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL]);
1323 
1324 	hdmi->curr_conn = NULL;
1325 
1326 	hdmi->enabled = false;
1327 }
1328 
1329 static void mtk_hdmi_bridge_atomic_post_disable(struct drm_bridge *bridge,
1330 						struct drm_bridge_state *old_state)
1331 {
1332 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1333 
1334 	if (!hdmi->powered)
1335 		return;
1336 
1337 	mtk_hdmi_hw_1p4_version_enable(hdmi, true);
1338 	mtk_hdmi_hw_make_reg_writable(hdmi, false);
1339 
1340 	hdmi->powered = false;
1341 }
1342 
1343 static void mtk_hdmi_bridge_mode_set(struct drm_bridge *bridge,
1344 				const struct drm_display_mode *mode,
1345 				const struct drm_display_mode *adjusted_mode)
1346 {
1347 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1348 
1349 	dev_dbg(hdmi->dev, "cur info: name:%s, hdisplay:%d\n",
1350 		adjusted_mode->name, adjusted_mode->hdisplay);
1351 	dev_dbg(hdmi->dev, "hsync_start:%d,hsync_end:%d, htotal:%d",
1352 		adjusted_mode->hsync_start, adjusted_mode->hsync_end,
1353 		adjusted_mode->htotal);
1354 	dev_dbg(hdmi->dev, "hskew:%d, vdisplay:%d\n",
1355 		adjusted_mode->hskew, adjusted_mode->vdisplay);
1356 	dev_dbg(hdmi->dev, "vsync_start:%d, vsync_end:%d, vtotal:%d",
1357 		adjusted_mode->vsync_start, adjusted_mode->vsync_end,
1358 		adjusted_mode->vtotal);
1359 	dev_dbg(hdmi->dev, "vscan:%d, flag:%d\n",
1360 		adjusted_mode->vscan, adjusted_mode->flags);
1361 
1362 	drm_mode_copy(&hdmi->mode, adjusted_mode);
1363 }
1364 
1365 static void mtk_hdmi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
1366 					      struct drm_bridge_state *old_state)
1367 {
1368 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1369 
1370 	mtk_hdmi_hw_make_reg_writable(hdmi, true);
1371 	mtk_hdmi_hw_1p4_version_enable(hdmi, true);
1372 
1373 	hdmi->powered = true;
1374 }
1375 
1376 static void mtk_hdmi_send_infoframe(struct mtk_hdmi *hdmi,
1377 				    struct drm_display_mode *mode)
1378 {
1379 	mtk_hdmi_setup_audio_infoframe(hdmi);
1380 	mtk_hdmi_setup_avi_infoframe(hdmi, mode);
1381 	mtk_hdmi_setup_spd_infoframe(hdmi, "mediatek", "On-chip HDMI");
1382 	if (mode->flags & DRM_MODE_FLAG_3D_MASK)
1383 		mtk_hdmi_setup_vendor_specific_infoframe(hdmi, mode);
1384 }
1385 
1386 static void mtk_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
1387 					  struct drm_bridge_state *old_state)
1388 {
1389 	struct drm_atomic_state *state = old_state->base.state;
1390 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1391 
1392 	/* Retrieve the connector through the atomic state. */
1393 	hdmi->curr_conn = drm_atomic_get_new_connector_for_encoder(state,
1394 								   bridge->encoder);
1395 
1396 	mtk_hdmi_output_set_display_mode(hdmi, &hdmi->mode);
1397 	clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL]);
1398 	clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_HDMI_PIXEL]);
1399 	phy_power_on(hdmi->phy);
1400 	mtk_hdmi_send_infoframe(hdmi, &hdmi->mode);
1401 
1402 	hdmi->enabled = true;
1403 }
1404 
1405 static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = {
1406 	.mode_valid = mtk_hdmi_bridge_mode_valid,
1407 	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
1408 	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
1409 	.atomic_reset = drm_atomic_helper_bridge_reset,
1410 	.attach = mtk_hdmi_bridge_attach,
1411 	.mode_fixup = mtk_hdmi_bridge_mode_fixup,
1412 	.atomic_disable = mtk_hdmi_bridge_atomic_disable,
1413 	.atomic_post_disable = mtk_hdmi_bridge_atomic_post_disable,
1414 	.mode_set = mtk_hdmi_bridge_mode_set,
1415 	.atomic_pre_enable = mtk_hdmi_bridge_atomic_pre_enable,
1416 	.atomic_enable = mtk_hdmi_bridge_atomic_enable,
1417 	.detect = mtk_hdmi_bridge_detect,
1418 	.get_edid = mtk_hdmi_bridge_get_edid,
1419 };
1420 
1421 static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
1422 				   struct platform_device *pdev)
1423 {
1424 	struct device *dev = &pdev->dev;
1425 	struct device_node *np = dev->of_node;
1426 	struct device_node *cec_np, *remote, *i2c_np;
1427 	struct platform_device *cec_pdev;
1428 	struct regmap *regmap;
1429 	struct resource *mem;
1430 	int ret;
1431 
1432 	ret = mtk_hdmi_get_all_clk(hdmi, np);
1433 	if (ret) {
1434 		if (ret != -EPROBE_DEFER)
1435 			dev_err(dev, "Failed to get clocks: %d\n", ret);
1436 
1437 		return ret;
1438 	}
1439 
1440 	/* The CEC module handles HDMI hotplug detection */
1441 	cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
1442 	if (!cec_np) {
1443 		dev_err(dev, "Failed to find CEC node\n");
1444 		return -EINVAL;
1445 	}
1446 
1447 	cec_pdev = of_find_device_by_node(cec_np);
1448 	if (!cec_pdev) {
1449 		dev_err(hdmi->dev, "Waiting for CEC device %pOF\n",
1450 			cec_np);
1451 		of_node_put(cec_np);
1452 		return -EPROBE_DEFER;
1453 	}
1454 	of_node_put(cec_np);
1455 	hdmi->cec_dev = &cec_pdev->dev;
1456 
1457 	/*
1458 	 * The mediatek,syscon-hdmi property contains a phandle link to the
1459 	 * MMSYS_CONFIG device and the register offset of the HDMI_SYS_CFG
1460 	 * registers it contains.
1461 	 */
1462 	regmap = syscon_regmap_lookup_by_phandle(np, "mediatek,syscon-hdmi");
1463 	ret = of_property_read_u32_index(np, "mediatek,syscon-hdmi", 1,
1464 					 &hdmi->sys_offset);
1465 	if (IS_ERR(regmap))
1466 		ret = PTR_ERR(regmap);
1467 	if (ret) {
1468 		dev_err(dev,
1469 			"Failed to get system configuration registers: %d\n",
1470 			ret);
1471 		goto put_device;
1472 	}
1473 	hdmi->sys_regmap = regmap;
1474 
1475 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1476 	hdmi->regs = devm_ioremap_resource(dev, mem);
1477 	if (IS_ERR(hdmi->regs)) {
1478 		ret = PTR_ERR(hdmi->regs);
1479 		goto put_device;
1480 	}
1481 
1482 	remote = of_graph_get_remote_node(np, 1, 0);
1483 	if (!remote) {
1484 		ret = -EINVAL;
1485 		goto put_device;
1486 	}
1487 
1488 	if (!of_device_is_compatible(remote, "hdmi-connector")) {
1489 		hdmi->next_bridge = of_drm_find_bridge(remote);
1490 		if (!hdmi->next_bridge) {
1491 			dev_err(dev, "Waiting for external bridge\n");
1492 			of_node_put(remote);
1493 			ret = -EPROBE_DEFER;
1494 			goto put_device;
1495 		}
1496 	}
1497 
1498 	i2c_np = of_parse_phandle(remote, "ddc-i2c-bus", 0);
1499 	if (!i2c_np) {
1500 		dev_err(dev, "Failed to find ddc-i2c-bus node in %pOF\n",
1501 			remote);
1502 		of_node_put(remote);
1503 		ret = -EINVAL;
1504 		goto put_device;
1505 	}
1506 	of_node_put(remote);
1507 
1508 	hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np);
1509 	of_node_put(i2c_np);
1510 	if (!hdmi->ddc_adpt) {
1511 		dev_err(dev, "Failed to get ddc i2c adapter by node\n");
1512 		ret = -EINVAL;
1513 		goto put_device;
1514 	}
1515 
1516 	return 0;
1517 put_device:
1518 	put_device(hdmi->cec_dev);
1519 	return ret;
1520 }
1521 
1522 /*
1523  * HDMI audio codec callbacks
1524  */
1525 
1526 static int mtk_hdmi_audio_hw_params(struct device *dev, void *data,
1527 				    struct hdmi_codec_daifmt *daifmt,
1528 				    struct hdmi_codec_params *params)
1529 {
1530 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1531 	struct hdmi_audio_param hdmi_params;
1532 	unsigned int chan = params->cea.channels;
1533 
1534 	dev_dbg(hdmi->dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
1535 		params->sample_rate, params->sample_width, chan);
1536 
1537 	if (!hdmi->bridge.encoder)
1538 		return -ENODEV;
1539 
1540 	switch (chan) {
1541 	case 2:
1542 		hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
1543 		break;
1544 	case 4:
1545 		hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_4_0;
1546 		break;
1547 	case 6:
1548 		hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_5_1;
1549 		break;
1550 	case 8:
1551 		hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_7_1;
1552 		break;
1553 	default:
1554 		dev_err(hdmi->dev, "channel[%d] not supported!\n", chan);
1555 		return -EINVAL;
1556 	}
1557 
1558 	switch (params->sample_rate) {
1559 	case 32000:
1560 	case 44100:
1561 	case 48000:
1562 	case 88200:
1563 	case 96000:
1564 	case 176400:
1565 	case 192000:
1566 		break;
1567 	default:
1568 		dev_err(hdmi->dev, "rate[%d] not supported!\n",
1569 			params->sample_rate);
1570 		return -EINVAL;
1571 	}
1572 
1573 	switch (daifmt->fmt) {
1574 	case HDMI_I2S:
1575 		hdmi_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
1576 		hdmi_params.aud_sampe_size = HDMI_AUDIO_SAMPLE_SIZE_16;
1577 		hdmi_params.aud_input_type = HDMI_AUD_INPUT_I2S;
1578 		hdmi_params.aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
1579 		hdmi_params.aud_mclk = HDMI_AUD_MCLK_128FS;
1580 		break;
1581 	case HDMI_SPDIF:
1582 		hdmi_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
1583 		hdmi_params.aud_sampe_size = HDMI_AUDIO_SAMPLE_SIZE_16;
1584 		hdmi_params.aud_input_type = HDMI_AUD_INPUT_SPDIF;
1585 		break;
1586 	default:
1587 		dev_err(hdmi->dev, "%s: Invalid DAI format %d\n", __func__,
1588 			daifmt->fmt);
1589 		return -EINVAL;
1590 	}
1591 
1592 	memcpy(&hdmi_params.codec_params, params,
1593 	       sizeof(hdmi_params.codec_params));
1594 
1595 	mtk_hdmi_audio_set_param(hdmi, &hdmi_params);
1596 
1597 	return 0;
1598 }
1599 
1600 static int mtk_hdmi_audio_startup(struct device *dev, void *data)
1601 {
1602 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1603 
1604 	mtk_hdmi_audio_enable(hdmi);
1605 
1606 	return 0;
1607 }
1608 
1609 static void mtk_hdmi_audio_shutdown(struct device *dev, void *data)
1610 {
1611 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1612 
1613 	mtk_hdmi_audio_disable(hdmi);
1614 }
1615 
1616 static int
1617 mtk_hdmi_audio_mute(struct device *dev, void *data,
1618 		    bool enable, int direction)
1619 {
1620 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1621 
1622 	if (enable)
1623 		mtk_hdmi_hw_aud_mute(hdmi);
1624 	else
1625 		mtk_hdmi_hw_aud_unmute(hdmi);
1626 
1627 	return 0;
1628 }
1629 
1630 static int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1631 {
1632 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1633 
1634 	if (hdmi->enabled)
1635 		memcpy(buf, hdmi->curr_conn->eld, min(sizeof(hdmi->curr_conn->eld), len));
1636 	else
1637 		memset(buf, 0, len);
1638 	return 0;
1639 }
1640 
1641 static int mtk_hdmi_audio_hook_plugged_cb(struct device *dev, void *data,
1642 					  hdmi_codec_plugged_cb fn,
1643 					  struct device *codec_dev)
1644 {
1645 	struct mtk_hdmi *hdmi = data;
1646 
1647 	mutex_lock(&hdmi->update_plugged_status_lock);
1648 	hdmi->plugged_cb = fn;
1649 	hdmi->codec_dev = codec_dev;
1650 	mutex_unlock(&hdmi->update_plugged_status_lock);
1651 
1652 	mtk_hdmi_update_plugged_status(hdmi);
1653 
1654 	return 0;
1655 }
1656 
1657 static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = {
1658 	.hw_params = mtk_hdmi_audio_hw_params,
1659 	.audio_startup = mtk_hdmi_audio_startup,
1660 	.audio_shutdown = mtk_hdmi_audio_shutdown,
1661 	.mute_stream = mtk_hdmi_audio_mute,
1662 	.get_eld = mtk_hdmi_audio_get_eld,
1663 	.hook_plugged_cb = mtk_hdmi_audio_hook_plugged_cb,
1664 	.no_capture_mute = 1,
1665 };
1666 
1667 static int mtk_hdmi_register_audio_driver(struct device *dev)
1668 {
1669 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1670 	struct hdmi_codec_pdata codec_data = {
1671 		.ops = &mtk_hdmi_audio_codec_ops,
1672 		.max_i2s_channels = 2,
1673 		.i2s = 1,
1674 		.data = hdmi,
1675 	};
1676 	struct platform_device *pdev;
1677 
1678 	pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
1679 					     PLATFORM_DEVID_AUTO, &codec_data,
1680 					     sizeof(codec_data));
1681 	if (IS_ERR(pdev))
1682 		return PTR_ERR(pdev);
1683 
1684 	DRM_INFO("%s driver bound to HDMI\n", HDMI_CODEC_DRV_NAME);
1685 	return 0;
1686 }
1687 
1688 static int mtk_drm_hdmi_probe(struct platform_device *pdev)
1689 {
1690 	struct mtk_hdmi *hdmi;
1691 	struct device *dev = &pdev->dev;
1692 	int ret;
1693 
1694 	hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1695 	if (!hdmi)
1696 		return -ENOMEM;
1697 
1698 	hdmi->dev = dev;
1699 	hdmi->conf = of_device_get_match_data(dev);
1700 
1701 	ret = mtk_hdmi_dt_parse_pdata(hdmi, pdev);
1702 	if (ret)
1703 		return ret;
1704 
1705 	hdmi->phy = devm_phy_get(dev, "hdmi");
1706 	if (IS_ERR(hdmi->phy)) {
1707 		ret = PTR_ERR(hdmi->phy);
1708 		dev_err(dev, "Failed to get HDMI PHY: %d\n", ret);
1709 		return ret;
1710 	}
1711 
1712 	mutex_init(&hdmi->update_plugged_status_lock);
1713 	platform_set_drvdata(pdev, hdmi);
1714 
1715 	ret = mtk_hdmi_output_init(hdmi);
1716 	if (ret) {
1717 		dev_err(dev, "Failed to initialize hdmi output\n");
1718 		return ret;
1719 	}
1720 
1721 	ret = mtk_hdmi_register_audio_driver(dev);
1722 	if (ret) {
1723 		dev_err(dev, "Failed to register audio driver: %d\n", ret);
1724 		return ret;
1725 	}
1726 
1727 	hdmi->bridge.funcs = &mtk_hdmi_bridge_funcs;
1728 	hdmi->bridge.of_node = pdev->dev.of_node;
1729 	hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
1730 			 | DRM_BRIDGE_OP_HPD;
1731 	hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1732 	drm_bridge_add(&hdmi->bridge);
1733 
1734 	ret = mtk_hdmi_clk_enable_audio(hdmi);
1735 	if (ret) {
1736 		dev_err(dev, "Failed to enable audio clocks: %d\n", ret);
1737 		goto err_bridge_remove;
1738 	}
1739 
1740 	return 0;
1741 
1742 err_bridge_remove:
1743 	drm_bridge_remove(&hdmi->bridge);
1744 	return ret;
1745 }
1746 
1747 static int mtk_drm_hdmi_remove(struct platform_device *pdev)
1748 {
1749 	struct mtk_hdmi *hdmi = platform_get_drvdata(pdev);
1750 
1751 	drm_bridge_remove(&hdmi->bridge);
1752 	mtk_hdmi_clk_disable_audio(hdmi);
1753 	return 0;
1754 }
1755 
1756 #ifdef CONFIG_PM_SLEEP
1757 static int mtk_hdmi_suspend(struct device *dev)
1758 {
1759 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1760 
1761 	mtk_hdmi_clk_disable_audio(hdmi);
1762 
1763 	return 0;
1764 }
1765 
1766 static int mtk_hdmi_resume(struct device *dev)
1767 {
1768 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1769 	int ret = 0;
1770 
1771 	ret = mtk_hdmi_clk_enable_audio(hdmi);
1772 	if (ret) {
1773 		dev_err(dev, "hdmi resume failed!\n");
1774 		return ret;
1775 	}
1776 
1777 	return 0;
1778 }
1779 #endif
1780 static SIMPLE_DEV_PM_OPS(mtk_hdmi_pm_ops,
1781 			 mtk_hdmi_suspend, mtk_hdmi_resume);
1782 
1783 static const struct mtk_hdmi_conf mtk_hdmi_conf_mt2701 = {
1784 	.tz_disabled = true,
1785 };
1786 
1787 static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8167 = {
1788 	.max_mode_clock = 148500,
1789 	.cea_modes_only = true,
1790 };
1791 
1792 static const struct of_device_id mtk_drm_hdmi_of_ids[] = {
1793 	{ .compatible = "mediatek,mt2701-hdmi",
1794 	  .data = &mtk_hdmi_conf_mt2701,
1795 	},
1796 	{ .compatible = "mediatek,mt8167-hdmi",
1797 	  .data = &mtk_hdmi_conf_mt8167,
1798 	},
1799 	{ .compatible = "mediatek,mt8173-hdmi",
1800 	},
1801 	{}
1802 };
1803 MODULE_DEVICE_TABLE(of, mtk_drm_hdmi_of_ids);
1804 
1805 static struct platform_driver mtk_hdmi_driver = {
1806 	.probe = mtk_drm_hdmi_probe,
1807 	.remove = mtk_drm_hdmi_remove,
1808 	.driver = {
1809 		.name = "mediatek-drm-hdmi",
1810 		.of_match_table = mtk_drm_hdmi_of_ids,
1811 		.pm = &mtk_hdmi_pm_ops,
1812 	},
1813 };
1814 
1815 static struct platform_driver * const mtk_hdmi_drivers[] = {
1816 	&mtk_hdmi_ddc_driver,
1817 	&mtk_cec_driver,
1818 	&mtk_hdmi_driver,
1819 };
1820 
1821 static int __init mtk_hdmitx_init(void)
1822 {
1823 	return platform_register_drivers(mtk_hdmi_drivers,
1824 					 ARRAY_SIZE(mtk_hdmi_drivers));
1825 }
1826 
1827 static void __exit mtk_hdmitx_exit(void)
1828 {
1829 	platform_unregister_drivers(mtk_hdmi_drivers,
1830 				    ARRAY_SIZE(mtk_hdmi_drivers));
1831 }
1832 
1833 module_init(mtk_hdmitx_init);
1834 module_exit(mtk_hdmitx_exit);
1835 
1836 MODULE_AUTHOR("Jie Qiu <jie.qiu@mediatek.com>");
1837 MODULE_DESCRIPTION("MediaTek HDMI Driver");
1838 MODULE_LICENSE("GPL v2");
1839