xref: /linux/drivers/gpu/drm/mediatek/mtk_hdmi.c (revision a1ff5a7d78a036d6c2178ee5acd6ba4946243800)
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_graph.h>
20 #include <linux/phy/phy.h>
21 #include <linux/platform_device.h>
22 #include <linux/regmap.h>
23 
24 #include <sound/hdmi-codec.h>
25 
26 #include <drm/drm_atomic_helper.h>
27 #include <drm/drm_bridge.h>
28 #include <drm/drm_crtc.h>
29 #include <drm/drm_edid.h>
30 #include <drm/drm_print.h>
31 #include <drm/drm_probe_helper.h>
32 
33 #include "mtk_cec.h"
34 #include "mtk_hdmi.h"
35 #include "mtk_hdmi_regs.h"
36 
37 #define NCTS_BYTES	7
38 
39 enum mtk_hdmi_clk_id {
40 	MTK_HDMI_CLK_HDMI_PIXEL,
41 	MTK_HDMI_CLK_HDMI_PLL,
42 	MTK_HDMI_CLK_AUD_BCLK,
43 	MTK_HDMI_CLK_AUD_SPDIF,
44 	MTK_HDMI_CLK_COUNT
45 };
46 
47 enum hdmi_aud_input_type {
48 	HDMI_AUD_INPUT_I2S = 0,
49 	HDMI_AUD_INPUT_SPDIF,
50 };
51 
52 enum hdmi_aud_i2s_fmt {
53 	HDMI_I2S_MODE_RJT_24BIT = 0,
54 	HDMI_I2S_MODE_RJT_16BIT,
55 	HDMI_I2S_MODE_LJT_24BIT,
56 	HDMI_I2S_MODE_LJT_16BIT,
57 	HDMI_I2S_MODE_I2S_24BIT,
58 	HDMI_I2S_MODE_I2S_16BIT
59 };
60 
61 enum hdmi_aud_mclk {
62 	HDMI_AUD_MCLK_128FS,
63 	HDMI_AUD_MCLK_192FS,
64 	HDMI_AUD_MCLK_256FS,
65 	HDMI_AUD_MCLK_384FS,
66 	HDMI_AUD_MCLK_512FS,
67 	HDMI_AUD_MCLK_768FS,
68 	HDMI_AUD_MCLK_1152FS,
69 };
70 
71 enum hdmi_aud_channel_type {
72 	HDMI_AUD_CHAN_TYPE_1_0 = 0,
73 	HDMI_AUD_CHAN_TYPE_1_1,
74 	HDMI_AUD_CHAN_TYPE_2_0,
75 	HDMI_AUD_CHAN_TYPE_2_1,
76 	HDMI_AUD_CHAN_TYPE_3_0,
77 	HDMI_AUD_CHAN_TYPE_3_1,
78 	HDMI_AUD_CHAN_TYPE_4_0,
79 	HDMI_AUD_CHAN_TYPE_4_1,
80 	HDMI_AUD_CHAN_TYPE_5_0,
81 	HDMI_AUD_CHAN_TYPE_5_1,
82 	HDMI_AUD_CHAN_TYPE_6_0,
83 	HDMI_AUD_CHAN_TYPE_6_1,
84 	HDMI_AUD_CHAN_TYPE_7_0,
85 	HDMI_AUD_CHAN_TYPE_7_1,
86 	HDMI_AUD_CHAN_TYPE_3_0_LRS,
87 	HDMI_AUD_CHAN_TYPE_3_1_LRS,
88 	HDMI_AUD_CHAN_TYPE_4_0_CLRS,
89 	HDMI_AUD_CHAN_TYPE_4_1_CLRS,
90 	HDMI_AUD_CHAN_TYPE_6_1_CS,
91 	HDMI_AUD_CHAN_TYPE_6_1_CH,
92 	HDMI_AUD_CHAN_TYPE_6_1_OH,
93 	HDMI_AUD_CHAN_TYPE_6_1_CHR,
94 	HDMI_AUD_CHAN_TYPE_7_1_LH_RH,
95 	HDMI_AUD_CHAN_TYPE_7_1_LSR_RSR,
96 	HDMI_AUD_CHAN_TYPE_7_1_LC_RC,
97 	HDMI_AUD_CHAN_TYPE_7_1_LW_RW,
98 	HDMI_AUD_CHAN_TYPE_7_1_LSD_RSD,
99 	HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS,
100 	HDMI_AUD_CHAN_TYPE_7_1_LHS_RHS,
101 	HDMI_AUD_CHAN_TYPE_7_1_CS_CH,
102 	HDMI_AUD_CHAN_TYPE_7_1_CS_OH,
103 	HDMI_AUD_CHAN_TYPE_7_1_CS_CHR,
104 	HDMI_AUD_CHAN_TYPE_7_1_CH_OH,
105 	HDMI_AUD_CHAN_TYPE_7_1_CH_CHR,
106 	HDMI_AUD_CHAN_TYPE_7_1_OH_CHR,
107 	HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS_LSR_RSR,
108 	HDMI_AUD_CHAN_TYPE_6_0_CS,
109 	HDMI_AUD_CHAN_TYPE_6_0_CH,
110 	HDMI_AUD_CHAN_TYPE_6_0_OH,
111 	HDMI_AUD_CHAN_TYPE_6_0_CHR,
112 	HDMI_AUD_CHAN_TYPE_7_0_LH_RH,
113 	HDMI_AUD_CHAN_TYPE_7_0_LSR_RSR,
114 	HDMI_AUD_CHAN_TYPE_7_0_LC_RC,
115 	HDMI_AUD_CHAN_TYPE_7_0_LW_RW,
116 	HDMI_AUD_CHAN_TYPE_7_0_LSD_RSD,
117 	HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS,
118 	HDMI_AUD_CHAN_TYPE_7_0_LHS_RHS,
119 	HDMI_AUD_CHAN_TYPE_7_0_CS_CH,
120 	HDMI_AUD_CHAN_TYPE_7_0_CS_OH,
121 	HDMI_AUD_CHAN_TYPE_7_0_CS_CHR,
122 	HDMI_AUD_CHAN_TYPE_7_0_CH_OH,
123 	HDMI_AUD_CHAN_TYPE_7_0_CH_CHR,
124 	HDMI_AUD_CHAN_TYPE_7_0_OH_CHR,
125 	HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS_LSR_RSR,
126 	HDMI_AUD_CHAN_TYPE_8_0_LH_RH_CS,
127 	HDMI_AUD_CHAN_TYPE_UNKNOWN = 0xFF
128 };
129 
130 enum hdmi_aud_channel_swap_type {
131 	HDMI_AUD_SWAP_LR,
132 	HDMI_AUD_SWAP_LFE_CC,
133 	HDMI_AUD_SWAP_LSRS,
134 	HDMI_AUD_SWAP_RLS_RRS,
135 	HDMI_AUD_SWAP_LR_STATUS,
136 };
137 
138 struct hdmi_audio_param {
139 	enum hdmi_audio_coding_type aud_codec;
140 	enum hdmi_audio_sample_size aud_sampe_size;
141 	enum hdmi_aud_input_type aud_input_type;
142 	enum hdmi_aud_i2s_fmt aud_i2s_fmt;
143 	enum hdmi_aud_mclk aud_mclk;
144 	enum hdmi_aud_channel_type aud_input_chan_type;
145 	struct hdmi_codec_params codec_params;
146 };
147 
148 struct mtk_hdmi_conf {
149 	bool tz_disabled;
150 	bool cea_modes_only;
151 	unsigned long max_mode_clock;
152 };
153 
154 struct mtk_hdmi {
155 	struct drm_bridge bridge;
156 	struct drm_bridge *next_bridge;
157 	struct drm_connector *curr_conn;/* current connector (only valid when 'enabled') */
158 	struct device *dev;
159 	const struct mtk_hdmi_conf *conf;
160 	struct phy *phy;
161 	struct device *cec_dev;
162 	struct i2c_adapter *ddc_adpt;
163 	struct clk *clk[MTK_HDMI_CLK_COUNT];
164 	struct drm_display_mode mode;
165 	bool dvi_mode;
166 	u32 min_clock;
167 	u32 max_clock;
168 	u32 max_hdisplay;
169 	u32 max_vdisplay;
170 	u32 ibias;
171 	u32 ibias_up;
172 	struct regmap *sys_regmap;
173 	unsigned int sys_offset;
174 	void __iomem *regs;
175 	enum hdmi_colorspace csp;
176 	struct hdmi_audio_param aud_param;
177 	bool audio_enable;
178 	bool powered;
179 	bool enabled;
180 	hdmi_codec_plugged_cb plugged_cb;
181 	struct device *codec_dev;
182 	struct mutex update_plugged_status_lock;
183 };
184 
hdmi_ctx_from_bridge(struct drm_bridge * b)185 static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b)
186 {
187 	return container_of(b, struct mtk_hdmi, bridge);
188 }
189 
mtk_hdmi_read(struct mtk_hdmi * hdmi,u32 offset)190 static u32 mtk_hdmi_read(struct mtk_hdmi *hdmi, u32 offset)
191 {
192 	return readl(hdmi->regs + offset);
193 }
194 
mtk_hdmi_write(struct mtk_hdmi * hdmi,u32 offset,u32 val)195 static void mtk_hdmi_write(struct mtk_hdmi *hdmi, u32 offset, u32 val)
196 {
197 	writel(val, hdmi->regs + offset);
198 }
199 
mtk_hdmi_clear_bits(struct mtk_hdmi * hdmi,u32 offset,u32 bits)200 static void mtk_hdmi_clear_bits(struct mtk_hdmi *hdmi, u32 offset, u32 bits)
201 {
202 	void __iomem *reg = hdmi->regs + offset;
203 	u32 tmp;
204 
205 	tmp = readl(reg);
206 	tmp &= ~bits;
207 	writel(tmp, reg);
208 }
209 
mtk_hdmi_set_bits(struct mtk_hdmi * hdmi,u32 offset,u32 bits)210 static void mtk_hdmi_set_bits(struct mtk_hdmi *hdmi, u32 offset, u32 bits)
211 {
212 	void __iomem *reg = hdmi->regs + offset;
213 	u32 tmp;
214 
215 	tmp = readl(reg);
216 	tmp |= bits;
217 	writel(tmp, reg);
218 }
219 
mtk_hdmi_mask(struct mtk_hdmi * hdmi,u32 offset,u32 val,u32 mask)220 static void mtk_hdmi_mask(struct mtk_hdmi *hdmi, u32 offset, u32 val, u32 mask)
221 {
222 	void __iomem *reg = hdmi->regs + offset;
223 	u32 tmp;
224 
225 	tmp = readl(reg);
226 	tmp = (tmp & ~mask) | (val & mask);
227 	writel(tmp, reg);
228 }
229 
mtk_hdmi_hw_vid_black(struct mtk_hdmi * hdmi,bool black)230 static void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, bool black)
231 {
232 	mtk_hdmi_mask(hdmi, VIDEO_CFG_4, black ? GEN_RGB : NORMAL_PATH,
233 		      VIDEO_SOURCE_SEL);
234 }
235 
mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi * hdmi,bool enable)236 static void mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi *hdmi, bool enable)
237 {
238 	struct arm_smccc_res res;
239 
240 	/*
241 	 * MT8173 HDMI hardware has an output control bit to enable/disable HDMI
242 	 * output. This bit can only be controlled in ARM supervisor mode.
243 	 * The ARM trusted firmware provides an API for the HDMI driver to set
244 	 * this control bit to enable HDMI output in supervisor mode.
245 	 */
246 	if (hdmi->conf && hdmi->conf->tz_disabled)
247 		regmap_update_bits(hdmi->sys_regmap,
248 				   hdmi->sys_offset + HDMI_SYS_CFG20,
249 				   0x80008005, enable ? 0x80000005 : 0x8000);
250 	else
251 		arm_smccc_smc(MTK_SIP_SET_AUTHORIZED_SECURE_REG, 0x14000904,
252 			      0x80000000, 0, 0, 0, 0, 0, &res);
253 
254 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
255 			   HDMI_PCLK_FREE_RUN, enable ? HDMI_PCLK_FREE_RUN : 0);
256 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C,
257 			   HDMI_ON | ANLG_ON, enable ? (HDMI_ON | ANLG_ON) : 0);
258 }
259 
mtk_hdmi_hw_1p4_version_enable(struct mtk_hdmi * hdmi,bool enable)260 static void mtk_hdmi_hw_1p4_version_enable(struct mtk_hdmi *hdmi, bool enable)
261 {
262 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
263 			   HDMI2P0_EN, enable ? 0 : HDMI2P0_EN);
264 }
265 
mtk_hdmi_hw_aud_mute(struct mtk_hdmi * hdmi)266 static void mtk_hdmi_hw_aud_mute(struct mtk_hdmi *hdmi)
267 {
268 	mtk_hdmi_set_bits(hdmi, GRL_AUDIO_CFG, AUDIO_ZERO);
269 }
270 
mtk_hdmi_hw_aud_unmute(struct mtk_hdmi * hdmi)271 static void mtk_hdmi_hw_aud_unmute(struct mtk_hdmi *hdmi)
272 {
273 	mtk_hdmi_clear_bits(hdmi, GRL_AUDIO_CFG, AUDIO_ZERO);
274 }
275 
mtk_hdmi_hw_reset(struct mtk_hdmi * hdmi)276 static void mtk_hdmi_hw_reset(struct mtk_hdmi *hdmi)
277 {
278 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C,
279 			   HDMI_RST, HDMI_RST);
280 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C,
281 			   HDMI_RST, 0);
282 	mtk_hdmi_clear_bits(hdmi, GRL_CFG3, CFG3_CONTROL_PACKET_DELAY);
283 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C,
284 			   ANLG_ON, ANLG_ON);
285 }
286 
mtk_hdmi_hw_enable_notice(struct mtk_hdmi * hdmi,bool enable_notice)287 static void mtk_hdmi_hw_enable_notice(struct mtk_hdmi *hdmi, bool enable_notice)
288 {
289 	mtk_hdmi_mask(hdmi, GRL_CFG2, enable_notice ? CFG2_NOTICE_EN : 0,
290 		      CFG2_NOTICE_EN);
291 }
292 
mtk_hdmi_hw_write_int_mask(struct mtk_hdmi * hdmi,u32 int_mask)293 static void mtk_hdmi_hw_write_int_mask(struct mtk_hdmi *hdmi, u32 int_mask)
294 {
295 	mtk_hdmi_write(hdmi, GRL_INT_MASK, int_mask);
296 }
297 
mtk_hdmi_hw_enable_dvi_mode(struct mtk_hdmi * hdmi,bool enable)298 static void mtk_hdmi_hw_enable_dvi_mode(struct mtk_hdmi *hdmi, bool enable)
299 {
300 	mtk_hdmi_mask(hdmi, GRL_CFG1, enable ? CFG1_DVI : 0, CFG1_DVI);
301 }
302 
mtk_hdmi_hw_send_info_frame(struct mtk_hdmi * hdmi,u8 * buffer,u8 len)303 static void mtk_hdmi_hw_send_info_frame(struct mtk_hdmi *hdmi, u8 *buffer,
304 					u8 len)
305 {
306 	u32 ctrl_reg = GRL_CTRL;
307 	int i;
308 	u8 *frame_data;
309 	enum hdmi_infoframe_type frame_type;
310 	u8 frame_ver;
311 	u8 frame_len;
312 	u8 checksum;
313 	int ctrl_frame_en = 0;
314 
315 	frame_type = *buffer++;
316 	frame_ver = *buffer++;
317 	frame_len = *buffer++;
318 	checksum = *buffer++;
319 	frame_data = buffer;
320 
321 	dev_dbg(hdmi->dev,
322 		"frame_type:0x%x,frame_ver:0x%x,frame_len:0x%x,checksum:0x%x\n",
323 		frame_type, frame_ver, frame_len, checksum);
324 
325 	switch (frame_type) {
326 	case HDMI_INFOFRAME_TYPE_AVI:
327 		ctrl_frame_en = CTRL_AVI_EN;
328 		ctrl_reg = GRL_CTRL;
329 		break;
330 	case HDMI_INFOFRAME_TYPE_SPD:
331 		ctrl_frame_en = CTRL_SPD_EN;
332 		ctrl_reg = GRL_CTRL;
333 		break;
334 	case HDMI_INFOFRAME_TYPE_AUDIO:
335 		ctrl_frame_en = CTRL_AUDIO_EN;
336 		ctrl_reg = GRL_CTRL;
337 		break;
338 	case HDMI_INFOFRAME_TYPE_VENDOR:
339 		ctrl_frame_en = VS_EN;
340 		ctrl_reg = GRL_ACP_ISRC_CTRL;
341 		break;
342 	default:
343 		dev_err(hdmi->dev, "Unknown infoframe type %d\n", frame_type);
344 		return;
345 	}
346 	mtk_hdmi_clear_bits(hdmi, ctrl_reg, ctrl_frame_en);
347 	mtk_hdmi_write(hdmi, GRL_INFOFRM_TYPE, frame_type);
348 	mtk_hdmi_write(hdmi, GRL_INFOFRM_VER, frame_ver);
349 	mtk_hdmi_write(hdmi, GRL_INFOFRM_LNG, frame_len);
350 
351 	mtk_hdmi_write(hdmi, GRL_IFM_PORT, checksum);
352 	for (i = 0; i < frame_len; i++)
353 		mtk_hdmi_write(hdmi, GRL_IFM_PORT, frame_data[i]);
354 
355 	mtk_hdmi_set_bits(hdmi, ctrl_reg, ctrl_frame_en);
356 }
357 
mtk_hdmi_hw_send_aud_packet(struct mtk_hdmi * hdmi,bool enable)358 static void mtk_hdmi_hw_send_aud_packet(struct mtk_hdmi *hdmi, bool enable)
359 {
360 	mtk_hdmi_mask(hdmi, GRL_SHIFT_R2, enable ? 0 : AUDIO_PACKET_OFF,
361 		      AUDIO_PACKET_OFF);
362 }
363 
mtk_hdmi_hw_config_sys(struct mtk_hdmi * hdmi)364 static void mtk_hdmi_hw_config_sys(struct mtk_hdmi *hdmi)
365 {
366 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
367 			   HDMI_OUT_FIFO_EN | MHL_MODE_ON, 0);
368 	usleep_range(2000, 4000);
369 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
370 			   HDMI_OUT_FIFO_EN | MHL_MODE_ON, HDMI_OUT_FIFO_EN);
371 }
372 
mtk_hdmi_hw_set_deep_color_mode(struct mtk_hdmi * hdmi)373 static void mtk_hdmi_hw_set_deep_color_mode(struct mtk_hdmi *hdmi)
374 {
375 	regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
376 			   DEEP_COLOR_MODE_MASK | DEEP_COLOR_EN,
377 			   COLOR_8BIT_MODE);
378 }
379 
mtk_hdmi_hw_send_av_mute(struct mtk_hdmi * hdmi)380 static void mtk_hdmi_hw_send_av_mute(struct mtk_hdmi *hdmi)
381 {
382 	mtk_hdmi_clear_bits(hdmi, GRL_CFG4, CTRL_AVMUTE);
383 	usleep_range(2000, 4000);
384 	mtk_hdmi_set_bits(hdmi, GRL_CFG4, CTRL_AVMUTE);
385 }
386 
mtk_hdmi_hw_send_av_unmute(struct mtk_hdmi * hdmi)387 static void mtk_hdmi_hw_send_av_unmute(struct mtk_hdmi *hdmi)
388 {
389 	mtk_hdmi_mask(hdmi, GRL_CFG4, CFG4_AV_UNMUTE_EN,
390 		      CFG4_AV_UNMUTE_EN | CFG4_AV_UNMUTE_SET);
391 	usleep_range(2000, 4000);
392 	mtk_hdmi_mask(hdmi, GRL_CFG4, CFG4_AV_UNMUTE_SET,
393 		      CFG4_AV_UNMUTE_EN | CFG4_AV_UNMUTE_SET);
394 }
395 
mtk_hdmi_hw_ncts_enable(struct mtk_hdmi * hdmi,bool on)396 static void mtk_hdmi_hw_ncts_enable(struct mtk_hdmi *hdmi, bool on)
397 {
398 	mtk_hdmi_mask(hdmi, GRL_CTS_CTRL, on ? 0 : CTS_CTRL_SOFT,
399 		      CTS_CTRL_SOFT);
400 }
401 
mtk_hdmi_hw_ncts_auto_write_enable(struct mtk_hdmi * hdmi,bool enable)402 static void mtk_hdmi_hw_ncts_auto_write_enable(struct mtk_hdmi *hdmi,
403 					       bool enable)
404 {
405 	mtk_hdmi_mask(hdmi, GRL_CTS_CTRL, enable ? NCTS_WRI_ANYTIME : 0,
406 		      NCTS_WRI_ANYTIME);
407 }
408 
mtk_hdmi_hw_msic_setting(struct mtk_hdmi * hdmi,struct drm_display_mode * mode)409 static void mtk_hdmi_hw_msic_setting(struct mtk_hdmi *hdmi,
410 				     struct drm_display_mode *mode)
411 {
412 	mtk_hdmi_clear_bits(hdmi, GRL_CFG4, CFG4_MHL_MODE);
413 
414 	if (mode->flags & DRM_MODE_FLAG_INTERLACE &&
415 	    mode->clock == 74250 &&
416 	    mode->vdisplay == 1080)
417 		mtk_hdmi_clear_bits(hdmi, GRL_CFG2, CFG2_MHL_DE_SEL);
418 	else
419 		mtk_hdmi_set_bits(hdmi, GRL_CFG2, CFG2_MHL_DE_SEL);
420 }
421 
mtk_hdmi_hw_aud_set_channel_swap(struct mtk_hdmi * hdmi,enum hdmi_aud_channel_swap_type swap)422 static void mtk_hdmi_hw_aud_set_channel_swap(struct mtk_hdmi *hdmi,
423 					enum hdmi_aud_channel_swap_type swap)
424 {
425 	u8 swap_bit;
426 
427 	switch (swap) {
428 	case HDMI_AUD_SWAP_LR:
429 		swap_bit = LR_SWAP;
430 		break;
431 	case HDMI_AUD_SWAP_LFE_CC:
432 		swap_bit = LFE_CC_SWAP;
433 		break;
434 	case HDMI_AUD_SWAP_LSRS:
435 		swap_bit = LSRS_SWAP;
436 		break;
437 	case HDMI_AUD_SWAP_RLS_RRS:
438 		swap_bit = RLS_RRS_SWAP;
439 		break;
440 	case HDMI_AUD_SWAP_LR_STATUS:
441 		swap_bit = LR_STATUS_SWAP;
442 		break;
443 	default:
444 		swap_bit = LFE_CC_SWAP;
445 		break;
446 	}
447 	mtk_hdmi_mask(hdmi, GRL_CH_SWAP, swap_bit, 0xff);
448 }
449 
mtk_hdmi_hw_aud_set_bit_num(struct mtk_hdmi * hdmi,enum hdmi_audio_sample_size bit_num)450 static void mtk_hdmi_hw_aud_set_bit_num(struct mtk_hdmi *hdmi,
451 					enum hdmi_audio_sample_size bit_num)
452 {
453 	u32 val;
454 
455 	switch (bit_num) {
456 	case HDMI_AUDIO_SAMPLE_SIZE_16:
457 		val = AOUT_16BIT;
458 		break;
459 	case HDMI_AUDIO_SAMPLE_SIZE_20:
460 		val = AOUT_20BIT;
461 		break;
462 	case HDMI_AUDIO_SAMPLE_SIZE_24:
463 	case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
464 		val = AOUT_24BIT;
465 		break;
466 	}
467 
468 	mtk_hdmi_mask(hdmi, GRL_AOUT_CFG, val, AOUT_BNUM_SEL_MASK);
469 }
470 
mtk_hdmi_hw_aud_set_i2s_fmt(struct mtk_hdmi * hdmi,enum hdmi_aud_i2s_fmt i2s_fmt)471 static void mtk_hdmi_hw_aud_set_i2s_fmt(struct mtk_hdmi *hdmi,
472 					enum hdmi_aud_i2s_fmt i2s_fmt)
473 {
474 	u32 val;
475 
476 	val = mtk_hdmi_read(hdmi, GRL_CFG0);
477 	val &= ~(CFG0_W_LENGTH_MASK | CFG0_I2S_MODE_MASK);
478 
479 	switch (i2s_fmt) {
480 	case HDMI_I2S_MODE_RJT_24BIT:
481 		val |= CFG0_I2S_MODE_RTJ | CFG0_W_LENGTH_24BIT;
482 		break;
483 	case HDMI_I2S_MODE_RJT_16BIT:
484 		val |= CFG0_I2S_MODE_RTJ | CFG0_W_LENGTH_16BIT;
485 		break;
486 	case HDMI_I2S_MODE_LJT_24BIT:
487 	default:
488 		val |= CFG0_I2S_MODE_LTJ | CFG0_W_LENGTH_24BIT;
489 		break;
490 	case HDMI_I2S_MODE_LJT_16BIT:
491 		val |= CFG0_I2S_MODE_LTJ | CFG0_W_LENGTH_16BIT;
492 		break;
493 	case HDMI_I2S_MODE_I2S_24BIT:
494 		val |= CFG0_I2S_MODE_I2S | CFG0_W_LENGTH_24BIT;
495 		break;
496 	case HDMI_I2S_MODE_I2S_16BIT:
497 		val |= CFG0_I2S_MODE_I2S | CFG0_W_LENGTH_16BIT;
498 		break;
499 	}
500 	mtk_hdmi_write(hdmi, GRL_CFG0, val);
501 }
502 
mtk_hdmi_hw_audio_config(struct mtk_hdmi * hdmi,bool dst)503 static void mtk_hdmi_hw_audio_config(struct mtk_hdmi *hdmi, bool dst)
504 {
505 	const u8 mask = HIGH_BIT_RATE | DST_NORMAL_DOUBLE | SACD_DST | DSD_SEL;
506 	u8 val;
507 
508 	/* Disable high bitrate, set DST packet normal/double */
509 	mtk_hdmi_clear_bits(hdmi, GRL_AOUT_CFG, HIGH_BIT_RATE_PACKET_ALIGN);
510 
511 	if (dst)
512 		val = DST_NORMAL_DOUBLE | SACD_DST;
513 	else
514 		val = 0;
515 
516 	mtk_hdmi_mask(hdmi, GRL_AUDIO_CFG, val, mask);
517 }
518 
mtk_hdmi_hw_aud_set_i2s_chan_num(struct mtk_hdmi * hdmi,enum hdmi_aud_channel_type channel_type,u8 channel_count)519 static void mtk_hdmi_hw_aud_set_i2s_chan_num(struct mtk_hdmi *hdmi,
520 					enum hdmi_aud_channel_type channel_type,
521 					u8 channel_count)
522 {
523 	unsigned int ch_switch;
524 	u8 i2s_uv;
525 
526 	ch_switch = CH_SWITCH(7, 7) | CH_SWITCH(6, 6) |
527 		    CH_SWITCH(5, 5) | CH_SWITCH(4, 4) |
528 		    CH_SWITCH(3, 3) | CH_SWITCH(1, 2) |
529 		    CH_SWITCH(2, 1) | CH_SWITCH(0, 0);
530 
531 	if (channel_count == 2) {
532 		i2s_uv = I2S_UV_CH_EN(0);
533 	} else if (channel_count == 3 || channel_count == 4) {
534 		if (channel_count == 4 &&
535 		    (channel_type == HDMI_AUD_CHAN_TYPE_3_0_LRS ||
536 		    channel_type == HDMI_AUD_CHAN_TYPE_4_0))
537 			i2s_uv = I2S_UV_CH_EN(2) | I2S_UV_CH_EN(0);
538 		else
539 			i2s_uv = I2S_UV_CH_EN(3) | I2S_UV_CH_EN(2);
540 	} else if (channel_count == 6 || channel_count == 5) {
541 		if (channel_count == 6 &&
542 		    channel_type != HDMI_AUD_CHAN_TYPE_5_1 &&
543 		    channel_type != HDMI_AUD_CHAN_TYPE_4_1_CLRS) {
544 			i2s_uv = I2S_UV_CH_EN(3) | I2S_UV_CH_EN(2) |
545 				 I2S_UV_CH_EN(1) | I2S_UV_CH_EN(0);
546 		} else {
547 			i2s_uv = I2S_UV_CH_EN(2) | I2S_UV_CH_EN(1) |
548 				 I2S_UV_CH_EN(0);
549 		}
550 	} else if (channel_count == 8 || channel_count == 7) {
551 		i2s_uv = I2S_UV_CH_EN(3) | I2S_UV_CH_EN(2) |
552 			 I2S_UV_CH_EN(1) | I2S_UV_CH_EN(0);
553 	} else {
554 		i2s_uv = I2S_UV_CH_EN(0);
555 	}
556 
557 	mtk_hdmi_write(hdmi, GRL_CH_SW0, ch_switch & 0xff);
558 	mtk_hdmi_write(hdmi, GRL_CH_SW1, (ch_switch >> 8) & 0xff);
559 	mtk_hdmi_write(hdmi, GRL_CH_SW2, (ch_switch >> 16) & 0xff);
560 	mtk_hdmi_write(hdmi, GRL_I2S_UV, i2s_uv);
561 }
562 
mtk_hdmi_hw_aud_set_input_type(struct mtk_hdmi * hdmi,enum hdmi_aud_input_type input_type)563 static void mtk_hdmi_hw_aud_set_input_type(struct mtk_hdmi *hdmi,
564 					   enum hdmi_aud_input_type input_type)
565 {
566 	u32 val;
567 
568 	val = mtk_hdmi_read(hdmi, GRL_CFG1);
569 	if (input_type == HDMI_AUD_INPUT_I2S &&
570 	    (val & CFG1_SPDIF) == CFG1_SPDIF) {
571 		val &= ~CFG1_SPDIF;
572 	} else if (input_type == HDMI_AUD_INPUT_SPDIF &&
573 		(val & CFG1_SPDIF) == 0) {
574 		val |= CFG1_SPDIF;
575 	}
576 	mtk_hdmi_write(hdmi, GRL_CFG1, val);
577 }
578 
mtk_hdmi_hw_aud_set_channel_status(struct mtk_hdmi * hdmi,u8 * channel_status)579 static void mtk_hdmi_hw_aud_set_channel_status(struct mtk_hdmi *hdmi,
580 					       u8 *channel_status)
581 {
582 	int i;
583 
584 	for (i = 0; i < 5; i++) {
585 		mtk_hdmi_write(hdmi, GRL_I2S_C_STA0 + i * 4, channel_status[i]);
586 		mtk_hdmi_write(hdmi, GRL_L_STATUS_0 + i * 4, channel_status[i]);
587 		mtk_hdmi_write(hdmi, GRL_R_STATUS_0 + i * 4, channel_status[i]);
588 	}
589 	for (; i < 24; i++) {
590 		mtk_hdmi_write(hdmi, GRL_L_STATUS_0 + i * 4, 0);
591 		mtk_hdmi_write(hdmi, GRL_R_STATUS_0 + i * 4, 0);
592 	}
593 }
594 
mtk_hdmi_hw_aud_src_reenable(struct mtk_hdmi * hdmi)595 static void mtk_hdmi_hw_aud_src_reenable(struct mtk_hdmi *hdmi)
596 {
597 	u32 val;
598 
599 	val = mtk_hdmi_read(hdmi, GRL_MIX_CTRL);
600 	if (val & MIX_CTRL_SRC_EN) {
601 		val &= ~MIX_CTRL_SRC_EN;
602 		mtk_hdmi_write(hdmi, GRL_MIX_CTRL, val);
603 		usleep_range(255, 512);
604 		val |= MIX_CTRL_SRC_EN;
605 		mtk_hdmi_write(hdmi, GRL_MIX_CTRL, val);
606 	}
607 }
608 
mtk_hdmi_hw_aud_src_disable(struct mtk_hdmi * hdmi)609 static void mtk_hdmi_hw_aud_src_disable(struct mtk_hdmi *hdmi)
610 {
611 	u32 val;
612 
613 	val = mtk_hdmi_read(hdmi, GRL_MIX_CTRL);
614 	val &= ~MIX_CTRL_SRC_EN;
615 	mtk_hdmi_write(hdmi, GRL_MIX_CTRL, val);
616 	mtk_hdmi_write(hdmi, GRL_SHIFT_L1, 0x00);
617 }
618 
mtk_hdmi_hw_aud_set_mclk(struct mtk_hdmi * hdmi,enum hdmi_aud_mclk mclk)619 static void mtk_hdmi_hw_aud_set_mclk(struct mtk_hdmi *hdmi,
620 				     enum hdmi_aud_mclk mclk)
621 {
622 	u32 val;
623 
624 	val = mtk_hdmi_read(hdmi, GRL_CFG5);
625 	val &= CFG5_CD_RATIO_MASK;
626 
627 	switch (mclk) {
628 	case HDMI_AUD_MCLK_128FS:
629 		val |= CFG5_FS128;
630 		break;
631 	case HDMI_AUD_MCLK_256FS:
632 		val |= CFG5_FS256;
633 		break;
634 	case HDMI_AUD_MCLK_384FS:
635 		val |= CFG5_FS384;
636 		break;
637 	case HDMI_AUD_MCLK_512FS:
638 		val |= CFG5_FS512;
639 		break;
640 	case HDMI_AUD_MCLK_768FS:
641 		val |= CFG5_FS768;
642 		break;
643 	default:
644 		val |= CFG5_FS256;
645 		break;
646 	}
647 	mtk_hdmi_write(hdmi, GRL_CFG5, val);
648 }
649 
650 struct hdmi_acr_n {
651 	unsigned int clock;
652 	unsigned int n[3];
653 };
654 
655 /* Recommended N values from HDMI specification, tables 7-1 to 7-3 */
656 static const struct hdmi_acr_n hdmi_rec_n_table[] = {
657 	/* Clock, N: 32kHz 44.1kHz 48kHz */
658 	{  25175, {  4576,  7007,  6864 } },
659 	{  74176, { 11648, 17836, 11648 } },
660 	{ 148352, { 11648,  8918,  5824 } },
661 	{ 296703, {  5824,  4459,  5824 } },
662 	{ 297000, {  3072,  4704,  5120 } },
663 	{      0, {  4096,  6272,  6144 } }, /* all other TMDS clocks */
664 };
665 
666 /**
667  * hdmi_recommended_n() - Return N value recommended by HDMI specification
668  * @freq: audio sample rate in Hz
669  * @clock: rounded TMDS clock in kHz
670  */
hdmi_recommended_n(unsigned int freq,unsigned int clock)671 static unsigned int hdmi_recommended_n(unsigned int freq, unsigned int clock)
672 {
673 	const struct hdmi_acr_n *recommended;
674 	unsigned int i;
675 
676 	for (i = 0; i < ARRAY_SIZE(hdmi_rec_n_table) - 1; i++) {
677 		if (clock == hdmi_rec_n_table[i].clock)
678 			break;
679 	}
680 	recommended = hdmi_rec_n_table + i;
681 
682 	switch (freq) {
683 	case 32000:
684 		return recommended->n[0];
685 	case 44100:
686 		return recommended->n[1];
687 	case 48000:
688 		return recommended->n[2];
689 	case 88200:
690 		return recommended->n[1] * 2;
691 	case 96000:
692 		return recommended->n[2] * 2;
693 	case 176400:
694 		return recommended->n[1] * 4;
695 	case 192000:
696 		return recommended->n[2] * 4;
697 	default:
698 		return (128 * freq) / 1000;
699 	}
700 }
701 
hdmi_mode_clock_to_hz(unsigned int clock)702 static unsigned int hdmi_mode_clock_to_hz(unsigned int clock)
703 {
704 	switch (clock) {
705 	case 25175:
706 		return 25174825;	/* 25.2/1.001 MHz */
707 	case 74176:
708 		return 74175824;	/* 74.25/1.001 MHz */
709 	case 148352:
710 		return 148351648;	/* 148.5/1.001 MHz */
711 	case 296703:
712 		return 296703297;	/* 297/1.001 MHz */
713 	default:
714 		return clock * 1000;
715 	}
716 }
717 
hdmi_expected_cts(unsigned int audio_sample_rate,unsigned int tmds_clock,unsigned int n)718 static unsigned int hdmi_expected_cts(unsigned int audio_sample_rate,
719 				      unsigned int tmds_clock, unsigned int n)
720 {
721 	return DIV_ROUND_CLOSEST_ULL((u64)hdmi_mode_clock_to_hz(tmds_clock) * n,
722 				     128 * audio_sample_rate);
723 }
724 
do_hdmi_hw_aud_set_ncts(struct mtk_hdmi * hdmi,unsigned int n,unsigned int cts)725 static void do_hdmi_hw_aud_set_ncts(struct mtk_hdmi *hdmi, unsigned int n,
726 				    unsigned int cts)
727 {
728 	unsigned char val[NCTS_BYTES];
729 	int i;
730 
731 	mtk_hdmi_write(hdmi, GRL_NCTS, 0);
732 	mtk_hdmi_write(hdmi, GRL_NCTS, 0);
733 	mtk_hdmi_write(hdmi, GRL_NCTS, 0);
734 	memset(val, 0, sizeof(val));
735 
736 	val[0] = (cts >> 24) & 0xff;
737 	val[1] = (cts >> 16) & 0xff;
738 	val[2] = (cts >> 8) & 0xff;
739 	val[3] = cts & 0xff;
740 
741 	val[4] = (n >> 16) & 0xff;
742 	val[5] = (n >> 8) & 0xff;
743 	val[6] = n & 0xff;
744 
745 	for (i = 0; i < NCTS_BYTES; i++)
746 		mtk_hdmi_write(hdmi, GRL_NCTS, val[i]);
747 }
748 
mtk_hdmi_hw_aud_set_ncts(struct mtk_hdmi * hdmi,unsigned int sample_rate,unsigned int clock)749 static void mtk_hdmi_hw_aud_set_ncts(struct mtk_hdmi *hdmi,
750 				     unsigned int sample_rate,
751 				     unsigned int clock)
752 {
753 	unsigned int n, cts;
754 
755 	n = hdmi_recommended_n(sample_rate, clock);
756 	cts = hdmi_expected_cts(sample_rate, clock, n);
757 
758 	dev_dbg(hdmi->dev, "%s: sample_rate=%u, clock=%d, cts=%u, n=%u\n",
759 		__func__, sample_rate, clock, n, cts);
760 
761 	mtk_hdmi_mask(hdmi, DUMMY_304, AUDIO_I2S_NCTS_SEL_64,
762 		      AUDIO_I2S_NCTS_SEL);
763 	do_hdmi_hw_aud_set_ncts(hdmi, n, cts);
764 }
765 
mtk_hdmi_aud_get_chnl_count(enum hdmi_aud_channel_type channel_type)766 static u8 mtk_hdmi_aud_get_chnl_count(enum hdmi_aud_channel_type channel_type)
767 {
768 	switch (channel_type) {
769 	case HDMI_AUD_CHAN_TYPE_1_0:
770 	case HDMI_AUD_CHAN_TYPE_1_1:
771 	case HDMI_AUD_CHAN_TYPE_2_0:
772 		return 2;
773 	case HDMI_AUD_CHAN_TYPE_2_1:
774 	case HDMI_AUD_CHAN_TYPE_3_0:
775 		return 3;
776 	case HDMI_AUD_CHAN_TYPE_3_1:
777 	case HDMI_AUD_CHAN_TYPE_4_0:
778 	case HDMI_AUD_CHAN_TYPE_3_0_LRS:
779 		return 4;
780 	case HDMI_AUD_CHAN_TYPE_4_1:
781 	case HDMI_AUD_CHAN_TYPE_5_0:
782 	case HDMI_AUD_CHAN_TYPE_3_1_LRS:
783 	case HDMI_AUD_CHAN_TYPE_4_0_CLRS:
784 		return 5;
785 	case HDMI_AUD_CHAN_TYPE_5_1:
786 	case HDMI_AUD_CHAN_TYPE_6_0:
787 	case HDMI_AUD_CHAN_TYPE_4_1_CLRS:
788 	case HDMI_AUD_CHAN_TYPE_6_0_CS:
789 	case HDMI_AUD_CHAN_TYPE_6_0_CH:
790 	case HDMI_AUD_CHAN_TYPE_6_0_OH:
791 	case HDMI_AUD_CHAN_TYPE_6_0_CHR:
792 		return 6;
793 	case HDMI_AUD_CHAN_TYPE_6_1:
794 	case HDMI_AUD_CHAN_TYPE_6_1_CS:
795 	case HDMI_AUD_CHAN_TYPE_6_1_CH:
796 	case HDMI_AUD_CHAN_TYPE_6_1_OH:
797 	case HDMI_AUD_CHAN_TYPE_6_1_CHR:
798 	case HDMI_AUD_CHAN_TYPE_7_0:
799 	case HDMI_AUD_CHAN_TYPE_7_0_LH_RH:
800 	case HDMI_AUD_CHAN_TYPE_7_0_LSR_RSR:
801 	case HDMI_AUD_CHAN_TYPE_7_0_LC_RC:
802 	case HDMI_AUD_CHAN_TYPE_7_0_LW_RW:
803 	case HDMI_AUD_CHAN_TYPE_7_0_LSD_RSD:
804 	case HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS:
805 	case HDMI_AUD_CHAN_TYPE_7_0_LHS_RHS:
806 	case HDMI_AUD_CHAN_TYPE_7_0_CS_CH:
807 	case HDMI_AUD_CHAN_TYPE_7_0_CS_OH:
808 	case HDMI_AUD_CHAN_TYPE_7_0_CS_CHR:
809 	case HDMI_AUD_CHAN_TYPE_7_0_CH_OH:
810 	case HDMI_AUD_CHAN_TYPE_7_0_CH_CHR:
811 	case HDMI_AUD_CHAN_TYPE_7_0_OH_CHR:
812 	case HDMI_AUD_CHAN_TYPE_7_0_LSS_RSS_LSR_RSR:
813 	case HDMI_AUD_CHAN_TYPE_8_0_LH_RH_CS:
814 		return 7;
815 	case HDMI_AUD_CHAN_TYPE_7_1:
816 	case HDMI_AUD_CHAN_TYPE_7_1_LH_RH:
817 	case HDMI_AUD_CHAN_TYPE_7_1_LSR_RSR:
818 	case HDMI_AUD_CHAN_TYPE_7_1_LC_RC:
819 	case HDMI_AUD_CHAN_TYPE_7_1_LW_RW:
820 	case HDMI_AUD_CHAN_TYPE_7_1_LSD_RSD:
821 	case HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS:
822 	case HDMI_AUD_CHAN_TYPE_7_1_LHS_RHS:
823 	case HDMI_AUD_CHAN_TYPE_7_1_CS_CH:
824 	case HDMI_AUD_CHAN_TYPE_7_1_CS_OH:
825 	case HDMI_AUD_CHAN_TYPE_7_1_CS_CHR:
826 	case HDMI_AUD_CHAN_TYPE_7_1_CH_OH:
827 	case HDMI_AUD_CHAN_TYPE_7_1_CH_CHR:
828 	case HDMI_AUD_CHAN_TYPE_7_1_OH_CHR:
829 	case HDMI_AUD_CHAN_TYPE_7_1_LSS_RSS_LSR_RSR:
830 		return 8;
831 	default:
832 		return 2;
833 	}
834 }
835 
mtk_hdmi_video_change_vpll(struct mtk_hdmi * hdmi,u32 clock)836 static int mtk_hdmi_video_change_vpll(struct mtk_hdmi *hdmi, u32 clock)
837 {
838 	unsigned long rate;
839 	int ret;
840 
841 	/* The DPI driver already should have set TVDPLL to the correct rate */
842 	ret = clk_set_rate(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL], clock);
843 	if (ret) {
844 		dev_err(hdmi->dev, "Failed to set PLL to %u Hz: %d\n", clock,
845 			ret);
846 		return ret;
847 	}
848 
849 	rate = clk_get_rate(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL]);
850 
851 	if (DIV_ROUND_CLOSEST(rate, 1000) != DIV_ROUND_CLOSEST(clock, 1000))
852 		dev_warn(hdmi->dev, "Want PLL %u Hz, got %lu Hz\n", clock,
853 			 rate);
854 	else
855 		dev_dbg(hdmi->dev, "Want PLL %u Hz, got %lu Hz\n", clock, rate);
856 
857 	mtk_hdmi_hw_config_sys(hdmi);
858 	mtk_hdmi_hw_set_deep_color_mode(hdmi);
859 	return 0;
860 }
861 
mtk_hdmi_video_set_display_mode(struct mtk_hdmi * hdmi,struct drm_display_mode * mode)862 static void mtk_hdmi_video_set_display_mode(struct mtk_hdmi *hdmi,
863 					    struct drm_display_mode *mode)
864 {
865 	mtk_hdmi_hw_reset(hdmi);
866 	mtk_hdmi_hw_enable_notice(hdmi, true);
867 	mtk_hdmi_hw_write_int_mask(hdmi, 0xff);
868 	mtk_hdmi_hw_enable_dvi_mode(hdmi, hdmi->dvi_mode);
869 	mtk_hdmi_hw_ncts_auto_write_enable(hdmi, true);
870 
871 	mtk_hdmi_hw_msic_setting(hdmi, mode);
872 }
873 
874 
mtk_hdmi_aud_set_input(struct mtk_hdmi * hdmi)875 static void mtk_hdmi_aud_set_input(struct mtk_hdmi *hdmi)
876 {
877 	enum hdmi_aud_channel_type chan_type;
878 	u8 chan_count;
879 	bool dst;
880 
881 	mtk_hdmi_hw_aud_set_channel_swap(hdmi, HDMI_AUD_SWAP_LFE_CC);
882 	mtk_hdmi_set_bits(hdmi, GRL_MIX_CTRL, MIX_CTRL_FLAT);
883 
884 	if (hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_SPDIF &&
885 	    hdmi->aud_param.aud_codec == HDMI_AUDIO_CODING_TYPE_DST) {
886 		mtk_hdmi_hw_aud_set_bit_num(hdmi, HDMI_AUDIO_SAMPLE_SIZE_24);
887 	} else if (hdmi->aud_param.aud_i2s_fmt == HDMI_I2S_MODE_LJT_24BIT) {
888 		hdmi->aud_param.aud_i2s_fmt = HDMI_I2S_MODE_LJT_16BIT;
889 	}
890 
891 	mtk_hdmi_hw_aud_set_i2s_fmt(hdmi, hdmi->aud_param.aud_i2s_fmt);
892 	mtk_hdmi_hw_aud_set_bit_num(hdmi, HDMI_AUDIO_SAMPLE_SIZE_24);
893 
894 	dst = ((hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_SPDIF) &&
895 	       (hdmi->aud_param.aud_codec == HDMI_AUDIO_CODING_TYPE_DST));
896 	mtk_hdmi_hw_audio_config(hdmi, dst);
897 
898 	if (hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_SPDIF)
899 		chan_type = HDMI_AUD_CHAN_TYPE_2_0;
900 	else
901 		chan_type = hdmi->aud_param.aud_input_chan_type;
902 	chan_count = mtk_hdmi_aud_get_chnl_count(chan_type);
903 	mtk_hdmi_hw_aud_set_i2s_chan_num(hdmi, chan_type, chan_count);
904 	mtk_hdmi_hw_aud_set_input_type(hdmi, hdmi->aud_param.aud_input_type);
905 }
906 
mtk_hdmi_aud_set_src(struct mtk_hdmi * hdmi,struct drm_display_mode * display_mode)907 static int mtk_hdmi_aud_set_src(struct mtk_hdmi *hdmi,
908 				struct drm_display_mode *display_mode)
909 {
910 	unsigned int sample_rate = hdmi->aud_param.codec_params.sample_rate;
911 
912 	mtk_hdmi_hw_ncts_enable(hdmi, false);
913 	mtk_hdmi_hw_aud_src_disable(hdmi);
914 	mtk_hdmi_clear_bits(hdmi, GRL_CFG2, CFG2_ACLK_INV);
915 
916 	if (hdmi->aud_param.aud_input_type == HDMI_AUD_INPUT_I2S) {
917 		switch (sample_rate) {
918 		case 32000:
919 		case 44100:
920 		case 48000:
921 		case 88200:
922 		case 96000:
923 			break;
924 		default:
925 			return -EINVAL;
926 		}
927 		mtk_hdmi_hw_aud_set_mclk(hdmi, hdmi->aud_param.aud_mclk);
928 	} else {
929 		switch (sample_rate) {
930 		case 32000:
931 		case 44100:
932 		case 48000:
933 			break;
934 		default:
935 			return -EINVAL;
936 		}
937 		mtk_hdmi_hw_aud_set_mclk(hdmi, HDMI_AUD_MCLK_128FS);
938 	}
939 
940 	mtk_hdmi_hw_aud_set_ncts(hdmi, sample_rate, display_mode->clock);
941 
942 	mtk_hdmi_hw_aud_src_reenable(hdmi);
943 	return 0;
944 }
945 
mtk_hdmi_aud_output_config(struct mtk_hdmi * hdmi,struct drm_display_mode * display_mode)946 static int mtk_hdmi_aud_output_config(struct mtk_hdmi *hdmi,
947 				      struct drm_display_mode *display_mode)
948 {
949 	mtk_hdmi_hw_aud_mute(hdmi);
950 	mtk_hdmi_hw_send_aud_packet(hdmi, false);
951 
952 	mtk_hdmi_aud_set_input(hdmi);
953 	mtk_hdmi_aud_set_src(hdmi, display_mode);
954 	mtk_hdmi_hw_aud_set_channel_status(hdmi,
955 			hdmi->aud_param.codec_params.iec.status);
956 
957 	usleep_range(50, 100);
958 
959 	mtk_hdmi_hw_ncts_enable(hdmi, true);
960 	mtk_hdmi_hw_send_aud_packet(hdmi, true);
961 	mtk_hdmi_hw_aud_unmute(hdmi);
962 	return 0;
963 }
964 
mtk_hdmi_setup_avi_infoframe(struct mtk_hdmi * hdmi,struct drm_display_mode * mode)965 static int mtk_hdmi_setup_avi_infoframe(struct mtk_hdmi *hdmi,
966 					struct drm_display_mode *mode)
967 {
968 	struct hdmi_avi_infoframe frame;
969 	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
970 	ssize_t err;
971 
972 	err = drm_hdmi_avi_infoframe_from_display_mode(&frame,
973 						       hdmi->curr_conn, mode);
974 	if (err < 0) {
975 		dev_err(hdmi->dev,
976 			"Failed to get AVI infoframe from mode: %zd\n", err);
977 		return err;
978 	}
979 
980 	err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
981 	if (err < 0) {
982 		dev_err(hdmi->dev, "Failed to pack AVI infoframe: %zd\n", err);
983 		return err;
984 	}
985 
986 	mtk_hdmi_hw_send_info_frame(hdmi, buffer, sizeof(buffer));
987 	return 0;
988 }
989 
mtk_hdmi_setup_spd_infoframe(struct mtk_hdmi * hdmi,const char * vendor,const char * product)990 static int mtk_hdmi_setup_spd_infoframe(struct mtk_hdmi *hdmi,
991 					const char *vendor,
992 					const char *product)
993 {
994 	struct hdmi_spd_infoframe frame;
995 	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_SPD_INFOFRAME_SIZE];
996 	ssize_t err;
997 
998 	err = hdmi_spd_infoframe_init(&frame, vendor, product);
999 	if (err < 0) {
1000 		dev_err(hdmi->dev, "Failed to initialize SPD infoframe: %zd\n",
1001 			err);
1002 		return err;
1003 	}
1004 
1005 	err = hdmi_spd_infoframe_pack(&frame, buffer, sizeof(buffer));
1006 	if (err < 0) {
1007 		dev_err(hdmi->dev, "Failed to pack SDP infoframe: %zd\n", err);
1008 		return err;
1009 	}
1010 
1011 	mtk_hdmi_hw_send_info_frame(hdmi, buffer, sizeof(buffer));
1012 	return 0;
1013 }
1014 
mtk_hdmi_setup_audio_infoframe(struct mtk_hdmi * hdmi)1015 static int mtk_hdmi_setup_audio_infoframe(struct mtk_hdmi *hdmi)
1016 {
1017 	struct hdmi_audio_infoframe frame;
1018 	u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
1019 	ssize_t err;
1020 
1021 	err = hdmi_audio_infoframe_init(&frame);
1022 	if (err < 0) {
1023 		dev_err(hdmi->dev, "Failed to setup audio infoframe: %zd\n",
1024 			err);
1025 		return err;
1026 	}
1027 
1028 	frame.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
1029 	frame.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
1030 	frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
1031 	frame.channels = mtk_hdmi_aud_get_chnl_count(
1032 					hdmi->aud_param.aud_input_chan_type);
1033 
1034 	err = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
1035 	if (err < 0) {
1036 		dev_err(hdmi->dev, "Failed to pack audio infoframe: %zd\n",
1037 			err);
1038 		return err;
1039 	}
1040 
1041 	mtk_hdmi_hw_send_info_frame(hdmi, buffer, sizeof(buffer));
1042 	return 0;
1043 }
1044 
mtk_hdmi_setup_vendor_specific_infoframe(struct mtk_hdmi * hdmi,struct drm_display_mode * mode)1045 static int mtk_hdmi_setup_vendor_specific_infoframe(struct mtk_hdmi *hdmi,
1046 						struct drm_display_mode *mode)
1047 {
1048 	struct hdmi_vendor_infoframe frame;
1049 	u8 buffer[10];
1050 	ssize_t err;
1051 
1052 	err = drm_hdmi_vendor_infoframe_from_display_mode(&frame,
1053 							  hdmi->curr_conn, mode);
1054 	if (err) {
1055 		dev_err(hdmi->dev,
1056 			"Failed to get vendor infoframe from mode: %zd\n", err);
1057 		return err;
1058 	}
1059 
1060 	err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer));
1061 	if (err < 0) {
1062 		dev_err(hdmi->dev, "Failed to pack vendor infoframe: %zd\n",
1063 			err);
1064 		return err;
1065 	}
1066 
1067 	mtk_hdmi_hw_send_info_frame(hdmi, buffer, sizeof(buffer));
1068 	return 0;
1069 }
1070 
mtk_hdmi_output_init(struct mtk_hdmi * hdmi)1071 static int mtk_hdmi_output_init(struct mtk_hdmi *hdmi)
1072 {
1073 	struct hdmi_audio_param *aud_param = &hdmi->aud_param;
1074 
1075 	hdmi->csp = HDMI_COLORSPACE_RGB;
1076 	aud_param->aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
1077 	aud_param->aud_sampe_size = HDMI_AUDIO_SAMPLE_SIZE_16;
1078 	aud_param->aud_input_type = HDMI_AUD_INPUT_I2S;
1079 	aud_param->aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
1080 	aud_param->aud_mclk = HDMI_AUD_MCLK_128FS;
1081 	aud_param->aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
1082 
1083 	return 0;
1084 }
1085 
mtk_hdmi_audio_enable(struct mtk_hdmi * hdmi)1086 static void mtk_hdmi_audio_enable(struct mtk_hdmi *hdmi)
1087 {
1088 	mtk_hdmi_hw_send_aud_packet(hdmi, true);
1089 	hdmi->audio_enable = true;
1090 }
1091 
mtk_hdmi_audio_disable(struct mtk_hdmi * hdmi)1092 static void mtk_hdmi_audio_disable(struct mtk_hdmi *hdmi)
1093 {
1094 	mtk_hdmi_hw_send_aud_packet(hdmi, false);
1095 	hdmi->audio_enable = false;
1096 }
1097 
mtk_hdmi_audio_set_param(struct mtk_hdmi * hdmi,struct hdmi_audio_param * param)1098 static int mtk_hdmi_audio_set_param(struct mtk_hdmi *hdmi,
1099 				    struct hdmi_audio_param *param)
1100 {
1101 	if (!hdmi->audio_enable) {
1102 		dev_err(hdmi->dev, "hdmi audio is in disable state!\n");
1103 		return -EINVAL;
1104 	}
1105 	dev_dbg(hdmi->dev, "codec:%d, input:%d, channel:%d, fs:%d\n",
1106 		param->aud_codec, param->aud_input_type,
1107 		param->aud_input_chan_type, param->codec_params.sample_rate);
1108 	memcpy(&hdmi->aud_param, param, sizeof(*param));
1109 	return mtk_hdmi_aud_output_config(hdmi, &hdmi->mode);
1110 }
1111 
mtk_hdmi_output_set_display_mode(struct mtk_hdmi * hdmi,struct drm_display_mode * mode)1112 static int mtk_hdmi_output_set_display_mode(struct mtk_hdmi *hdmi,
1113 					    struct drm_display_mode *mode)
1114 {
1115 	int ret;
1116 
1117 	mtk_hdmi_hw_vid_black(hdmi, true);
1118 	mtk_hdmi_hw_aud_mute(hdmi);
1119 	mtk_hdmi_hw_send_av_mute(hdmi);
1120 	phy_power_off(hdmi->phy);
1121 
1122 	ret = mtk_hdmi_video_change_vpll(hdmi,
1123 					 mode->clock * 1000);
1124 	if (ret) {
1125 		dev_err(hdmi->dev, "Failed to set vpll: %d\n", ret);
1126 		return ret;
1127 	}
1128 	mtk_hdmi_video_set_display_mode(hdmi, mode);
1129 
1130 	phy_power_on(hdmi->phy);
1131 	mtk_hdmi_aud_output_config(hdmi, mode);
1132 
1133 	mtk_hdmi_hw_vid_black(hdmi, false);
1134 	mtk_hdmi_hw_aud_unmute(hdmi);
1135 	mtk_hdmi_hw_send_av_unmute(hdmi);
1136 
1137 	return 0;
1138 }
1139 
1140 static const char * const mtk_hdmi_clk_names[MTK_HDMI_CLK_COUNT] = {
1141 	[MTK_HDMI_CLK_HDMI_PIXEL] = "pixel",
1142 	[MTK_HDMI_CLK_HDMI_PLL] = "pll",
1143 	[MTK_HDMI_CLK_AUD_BCLK] = "bclk",
1144 	[MTK_HDMI_CLK_AUD_SPDIF] = "spdif",
1145 };
1146 
mtk_hdmi_get_all_clk(struct mtk_hdmi * hdmi,struct device_node * np)1147 static int mtk_hdmi_get_all_clk(struct mtk_hdmi *hdmi,
1148 				struct device_node *np)
1149 {
1150 	int i;
1151 
1152 	for (i = 0; i < ARRAY_SIZE(mtk_hdmi_clk_names); i++) {
1153 		hdmi->clk[i] = of_clk_get_by_name(np,
1154 						  mtk_hdmi_clk_names[i]);
1155 		if (IS_ERR(hdmi->clk[i]))
1156 			return PTR_ERR(hdmi->clk[i]);
1157 	}
1158 	return 0;
1159 }
1160 
mtk_hdmi_clk_enable_audio(struct mtk_hdmi * hdmi)1161 static int mtk_hdmi_clk_enable_audio(struct mtk_hdmi *hdmi)
1162 {
1163 	int ret;
1164 
1165 	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_AUD_BCLK]);
1166 	if (ret)
1167 		return ret;
1168 
1169 	ret = clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]);
1170 	if (ret)
1171 		goto err;
1172 
1173 	return 0;
1174 err:
1175 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_BCLK]);
1176 	return ret;
1177 }
1178 
mtk_hdmi_clk_disable_audio(struct mtk_hdmi * hdmi)1179 static void mtk_hdmi_clk_disable_audio(struct mtk_hdmi *hdmi)
1180 {
1181 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_BCLK]);
1182 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_AUD_SPDIF]);
1183 }
1184 
1185 static enum drm_connector_status
mtk_hdmi_update_plugged_status(struct mtk_hdmi * hdmi)1186 mtk_hdmi_update_plugged_status(struct mtk_hdmi *hdmi)
1187 {
1188 	bool connected;
1189 
1190 	mutex_lock(&hdmi->update_plugged_status_lock);
1191 	connected = mtk_cec_hpd_high(hdmi->cec_dev);
1192 	if (hdmi->plugged_cb && hdmi->codec_dev)
1193 		hdmi->plugged_cb(hdmi->codec_dev, connected);
1194 	mutex_unlock(&hdmi->update_plugged_status_lock);
1195 
1196 	return connected ?
1197 	       connector_status_connected : connector_status_disconnected;
1198 }
1199 
mtk_hdmi_detect(struct mtk_hdmi * hdmi)1200 static enum drm_connector_status mtk_hdmi_detect(struct mtk_hdmi *hdmi)
1201 {
1202 	return mtk_hdmi_update_plugged_status(hdmi);
1203 }
1204 
1205 static enum drm_mode_status
mtk_hdmi_bridge_mode_valid(struct drm_bridge * bridge,const struct drm_display_info * info,const struct drm_display_mode * mode)1206 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 
1212 	dev_dbg(hdmi->dev, "xres=%d, yres=%d, refresh=%d, intl=%d clock=%d\n",
1213 		mode->hdisplay, mode->vdisplay, drm_mode_vrefresh(mode),
1214 		!!(mode->flags & DRM_MODE_FLAG_INTERLACE), mode->clock * 1000);
1215 
1216 	if (hdmi->conf) {
1217 		if (hdmi->conf->cea_modes_only && !drm_match_cea_mode(mode))
1218 			return MODE_BAD;
1219 
1220 		if (hdmi->conf->max_mode_clock &&
1221 		    mode->clock > hdmi->conf->max_mode_clock)
1222 			return MODE_CLOCK_HIGH;
1223 	}
1224 
1225 	if (mode->clock < 27000)
1226 		return MODE_CLOCK_LOW;
1227 	if (mode->clock > 297000)
1228 		return MODE_CLOCK_HIGH;
1229 
1230 	return drm_mode_validate_size(mode, 0x1fff, 0x1fff);
1231 }
1232 
mtk_hdmi_hpd_event(bool hpd,struct device * dev)1233 static void mtk_hdmi_hpd_event(bool hpd, struct device *dev)
1234 {
1235 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1236 
1237 	if (hdmi && hdmi->bridge.encoder && hdmi->bridge.encoder->dev) {
1238 		static enum drm_connector_status status;
1239 
1240 		status = mtk_hdmi_detect(hdmi);
1241 		drm_helper_hpd_irq_event(hdmi->bridge.encoder->dev);
1242 		drm_bridge_hpd_notify(&hdmi->bridge, status);
1243 	}
1244 }
1245 
1246 /*
1247  * Bridge callbacks
1248  */
1249 
mtk_hdmi_bridge_detect(struct drm_bridge * bridge)1250 static enum drm_connector_status mtk_hdmi_bridge_detect(struct drm_bridge *bridge)
1251 {
1252 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1253 
1254 	return mtk_hdmi_detect(hdmi);
1255 }
1256 
mtk_hdmi_bridge_edid_read(struct drm_bridge * bridge,struct drm_connector * connector)1257 static const struct drm_edid *mtk_hdmi_bridge_edid_read(struct drm_bridge *bridge,
1258 							struct drm_connector *connector)
1259 {
1260 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1261 	const struct drm_edid *drm_edid;
1262 
1263 	if (!hdmi->ddc_adpt)
1264 		return NULL;
1265 	drm_edid = drm_edid_read_ddc(connector, hdmi->ddc_adpt);
1266 	if (drm_edid) {
1267 		/*
1268 		 * FIXME: This should use !connector->display_info.has_audio (or
1269 		 * !connector->display_info.is_hdmi) from a path that has read
1270 		 * the EDID and called drm_edid_connector_update().
1271 		 */
1272 		const struct edid *edid = drm_edid_raw(drm_edid);
1273 
1274 		hdmi->dvi_mode = !drm_detect_monitor_audio(edid);
1275 	}
1276 
1277 	return drm_edid;
1278 }
1279 
mtk_hdmi_bridge_attach(struct drm_bridge * bridge,enum drm_bridge_attach_flags flags)1280 static int mtk_hdmi_bridge_attach(struct drm_bridge *bridge,
1281 				  enum drm_bridge_attach_flags flags)
1282 {
1283 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1284 	int ret;
1285 
1286 	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
1287 		DRM_ERROR("%s: The flag DRM_BRIDGE_ATTACH_NO_CONNECTOR must be supplied\n",
1288 			  __func__);
1289 		return -EINVAL;
1290 	}
1291 
1292 	if (hdmi->next_bridge) {
1293 		ret = drm_bridge_attach(bridge->encoder, hdmi->next_bridge,
1294 					bridge, flags);
1295 		if (ret)
1296 			return ret;
1297 	}
1298 
1299 	mtk_cec_set_hpd_event(hdmi->cec_dev, mtk_hdmi_hpd_event, hdmi->dev);
1300 
1301 	return 0;
1302 }
1303 
mtk_hdmi_bridge_mode_fixup(struct drm_bridge * bridge,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)1304 static bool mtk_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
1305 				       const struct drm_display_mode *mode,
1306 				       struct drm_display_mode *adjusted_mode)
1307 {
1308 	return true;
1309 }
1310 
mtk_hdmi_bridge_atomic_disable(struct drm_bridge * bridge,struct drm_bridge_state * old_bridge_state)1311 static void mtk_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
1312 					   struct drm_bridge_state *old_bridge_state)
1313 {
1314 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1315 
1316 	if (!hdmi->enabled)
1317 		return;
1318 
1319 	phy_power_off(hdmi->phy);
1320 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_HDMI_PIXEL]);
1321 	clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL]);
1322 
1323 	hdmi->curr_conn = NULL;
1324 
1325 	hdmi->enabled = false;
1326 }
1327 
mtk_hdmi_bridge_atomic_post_disable(struct drm_bridge * bridge,struct drm_bridge_state * old_state)1328 static void mtk_hdmi_bridge_atomic_post_disable(struct drm_bridge *bridge,
1329 						struct drm_bridge_state *old_state)
1330 {
1331 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1332 
1333 	if (!hdmi->powered)
1334 		return;
1335 
1336 	mtk_hdmi_hw_1p4_version_enable(hdmi, true);
1337 	mtk_hdmi_hw_make_reg_writable(hdmi, false);
1338 
1339 	hdmi->powered = false;
1340 }
1341 
mtk_hdmi_bridge_mode_set(struct drm_bridge * bridge,const struct drm_display_mode * mode,const struct drm_display_mode * adjusted_mode)1342 static void mtk_hdmi_bridge_mode_set(struct drm_bridge *bridge,
1343 				const struct drm_display_mode *mode,
1344 				const struct drm_display_mode *adjusted_mode)
1345 {
1346 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1347 
1348 	dev_dbg(hdmi->dev, "cur info: name:%s, hdisplay:%d\n",
1349 		adjusted_mode->name, adjusted_mode->hdisplay);
1350 	dev_dbg(hdmi->dev, "hsync_start:%d,hsync_end:%d, htotal:%d",
1351 		adjusted_mode->hsync_start, adjusted_mode->hsync_end,
1352 		adjusted_mode->htotal);
1353 	dev_dbg(hdmi->dev, "hskew:%d, vdisplay:%d\n",
1354 		adjusted_mode->hskew, adjusted_mode->vdisplay);
1355 	dev_dbg(hdmi->dev, "vsync_start:%d, vsync_end:%d, vtotal:%d",
1356 		adjusted_mode->vsync_start, adjusted_mode->vsync_end,
1357 		adjusted_mode->vtotal);
1358 	dev_dbg(hdmi->dev, "vscan:%d, flag:%d\n",
1359 		adjusted_mode->vscan, adjusted_mode->flags);
1360 
1361 	drm_mode_copy(&hdmi->mode, adjusted_mode);
1362 }
1363 
mtk_hdmi_bridge_atomic_pre_enable(struct drm_bridge * bridge,struct drm_bridge_state * old_state)1364 static void mtk_hdmi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
1365 					      struct drm_bridge_state *old_state)
1366 {
1367 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1368 
1369 	mtk_hdmi_hw_make_reg_writable(hdmi, true);
1370 	mtk_hdmi_hw_1p4_version_enable(hdmi, true);
1371 
1372 	hdmi->powered = true;
1373 }
1374 
mtk_hdmi_send_infoframe(struct mtk_hdmi * hdmi,struct drm_display_mode * mode)1375 static void mtk_hdmi_send_infoframe(struct mtk_hdmi *hdmi,
1376 				    struct drm_display_mode *mode)
1377 {
1378 	mtk_hdmi_setup_audio_infoframe(hdmi);
1379 	mtk_hdmi_setup_avi_infoframe(hdmi, mode);
1380 	mtk_hdmi_setup_spd_infoframe(hdmi, "mediatek", "On-chip HDMI");
1381 	if (mode->flags & DRM_MODE_FLAG_3D_MASK)
1382 		mtk_hdmi_setup_vendor_specific_infoframe(hdmi, mode);
1383 }
1384 
mtk_hdmi_bridge_atomic_enable(struct drm_bridge * bridge,struct drm_bridge_state * old_state)1385 static void mtk_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
1386 					  struct drm_bridge_state *old_state)
1387 {
1388 	struct drm_atomic_state *state = old_state->base.state;
1389 	struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
1390 
1391 	/* Retrieve the connector through the atomic state. */
1392 	hdmi->curr_conn = drm_atomic_get_new_connector_for_encoder(state,
1393 								   bridge->encoder);
1394 
1395 	mtk_hdmi_output_set_display_mode(hdmi, &hdmi->mode);
1396 	clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL]);
1397 	clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_HDMI_PIXEL]);
1398 	phy_power_on(hdmi->phy);
1399 	mtk_hdmi_send_infoframe(hdmi, &hdmi->mode);
1400 
1401 	hdmi->enabled = true;
1402 }
1403 
1404 static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = {
1405 	.mode_valid = mtk_hdmi_bridge_mode_valid,
1406 	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
1407 	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
1408 	.atomic_reset = drm_atomic_helper_bridge_reset,
1409 	.attach = mtk_hdmi_bridge_attach,
1410 	.mode_fixup = mtk_hdmi_bridge_mode_fixup,
1411 	.atomic_disable = mtk_hdmi_bridge_atomic_disable,
1412 	.atomic_post_disable = mtk_hdmi_bridge_atomic_post_disable,
1413 	.mode_set = mtk_hdmi_bridge_mode_set,
1414 	.atomic_pre_enable = mtk_hdmi_bridge_atomic_pre_enable,
1415 	.atomic_enable = mtk_hdmi_bridge_atomic_enable,
1416 	.detect = mtk_hdmi_bridge_detect,
1417 	.edid_read = mtk_hdmi_bridge_edid_read,
1418 };
1419 
mtk_hdmi_dt_parse_pdata(struct mtk_hdmi * hdmi,struct platform_device * pdev)1420 static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
1421 				   struct platform_device *pdev)
1422 {
1423 	struct device *dev = &pdev->dev;
1424 	struct device_node *np = dev->of_node;
1425 	struct device_node *cec_np, *remote, *i2c_np;
1426 	struct platform_device *cec_pdev;
1427 	struct regmap *regmap;
1428 	struct resource *mem;
1429 	int ret;
1430 
1431 	ret = mtk_hdmi_get_all_clk(hdmi, np);
1432 	if (ret) {
1433 		if (ret != -EPROBE_DEFER)
1434 			dev_err(dev, "Failed to get clocks: %d\n", ret);
1435 
1436 		return ret;
1437 	}
1438 
1439 	/* The CEC module handles HDMI hotplug detection */
1440 	cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
1441 	if (!cec_np) {
1442 		dev_err(dev, "Failed to find CEC node\n");
1443 		return -EINVAL;
1444 	}
1445 
1446 	cec_pdev = of_find_device_by_node(cec_np);
1447 	if (!cec_pdev) {
1448 		dev_err(hdmi->dev, "Waiting for CEC device %pOF\n",
1449 			cec_np);
1450 		of_node_put(cec_np);
1451 		return -EPROBE_DEFER;
1452 	}
1453 	of_node_put(cec_np);
1454 	hdmi->cec_dev = &cec_pdev->dev;
1455 
1456 	/*
1457 	 * The mediatek,syscon-hdmi property contains a phandle link to the
1458 	 * MMSYS_CONFIG device and the register offset of the HDMI_SYS_CFG
1459 	 * registers it contains.
1460 	 */
1461 	regmap = syscon_regmap_lookup_by_phandle(np, "mediatek,syscon-hdmi");
1462 	ret = of_property_read_u32_index(np, "mediatek,syscon-hdmi", 1,
1463 					 &hdmi->sys_offset);
1464 	if (IS_ERR(regmap))
1465 		ret = PTR_ERR(regmap);
1466 	if (ret) {
1467 		dev_err(dev,
1468 			"Failed to get system configuration registers: %d\n",
1469 			ret);
1470 		goto put_device;
1471 	}
1472 	hdmi->sys_regmap = regmap;
1473 
1474 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1475 	hdmi->regs = devm_ioremap_resource(dev, mem);
1476 	if (IS_ERR(hdmi->regs)) {
1477 		ret = PTR_ERR(hdmi->regs);
1478 		goto put_device;
1479 	}
1480 
1481 	remote = of_graph_get_remote_node(np, 1, 0);
1482 	if (!remote) {
1483 		ret = -EINVAL;
1484 		goto put_device;
1485 	}
1486 
1487 	if (!of_device_is_compatible(remote, "hdmi-connector")) {
1488 		hdmi->next_bridge = of_drm_find_bridge(remote);
1489 		if (!hdmi->next_bridge) {
1490 			dev_err(dev, "Waiting for external bridge\n");
1491 			of_node_put(remote);
1492 			ret = -EPROBE_DEFER;
1493 			goto put_device;
1494 		}
1495 	}
1496 
1497 	i2c_np = of_parse_phandle(remote, "ddc-i2c-bus", 0);
1498 	if (!i2c_np) {
1499 		dev_err(dev, "Failed to find ddc-i2c-bus node in %pOF\n",
1500 			remote);
1501 		of_node_put(remote);
1502 		ret = -EINVAL;
1503 		goto put_device;
1504 	}
1505 	of_node_put(remote);
1506 
1507 	hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np);
1508 	of_node_put(i2c_np);
1509 	if (!hdmi->ddc_adpt) {
1510 		dev_err(dev, "Failed to get ddc i2c adapter by node\n");
1511 		ret = -EINVAL;
1512 		goto put_device;
1513 	}
1514 
1515 	return 0;
1516 put_device:
1517 	put_device(hdmi->cec_dev);
1518 	return ret;
1519 }
1520 
1521 /*
1522  * HDMI audio codec callbacks
1523  */
1524 
mtk_hdmi_audio_hw_params(struct device * dev,void * data,struct hdmi_codec_daifmt * daifmt,struct hdmi_codec_params * params)1525 static int mtk_hdmi_audio_hw_params(struct device *dev, void *data,
1526 				    struct hdmi_codec_daifmt *daifmt,
1527 				    struct hdmi_codec_params *params)
1528 {
1529 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1530 	struct hdmi_audio_param hdmi_params;
1531 	unsigned int chan = params->cea.channels;
1532 
1533 	dev_dbg(hdmi->dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
1534 		params->sample_rate, params->sample_width, chan);
1535 
1536 	if (!hdmi->bridge.encoder)
1537 		return -ENODEV;
1538 
1539 	switch (chan) {
1540 	case 2:
1541 		hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_2_0;
1542 		break;
1543 	case 4:
1544 		hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_4_0;
1545 		break;
1546 	case 6:
1547 		hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_5_1;
1548 		break;
1549 	case 8:
1550 		hdmi_params.aud_input_chan_type = HDMI_AUD_CHAN_TYPE_7_1;
1551 		break;
1552 	default:
1553 		dev_err(hdmi->dev, "channel[%d] not supported!\n", chan);
1554 		return -EINVAL;
1555 	}
1556 
1557 	switch (params->sample_rate) {
1558 	case 32000:
1559 	case 44100:
1560 	case 48000:
1561 	case 88200:
1562 	case 96000:
1563 	case 176400:
1564 	case 192000:
1565 		break;
1566 	default:
1567 		dev_err(hdmi->dev, "rate[%d] not supported!\n",
1568 			params->sample_rate);
1569 		return -EINVAL;
1570 	}
1571 
1572 	switch (daifmt->fmt) {
1573 	case HDMI_I2S:
1574 		hdmi_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
1575 		hdmi_params.aud_sampe_size = HDMI_AUDIO_SAMPLE_SIZE_16;
1576 		hdmi_params.aud_input_type = HDMI_AUD_INPUT_I2S;
1577 		hdmi_params.aud_i2s_fmt = HDMI_I2S_MODE_I2S_24BIT;
1578 		hdmi_params.aud_mclk = HDMI_AUD_MCLK_128FS;
1579 		break;
1580 	case HDMI_SPDIF:
1581 		hdmi_params.aud_codec = HDMI_AUDIO_CODING_TYPE_PCM;
1582 		hdmi_params.aud_sampe_size = HDMI_AUDIO_SAMPLE_SIZE_16;
1583 		hdmi_params.aud_input_type = HDMI_AUD_INPUT_SPDIF;
1584 		break;
1585 	default:
1586 		dev_err(hdmi->dev, "%s: Invalid DAI format %d\n", __func__,
1587 			daifmt->fmt);
1588 		return -EINVAL;
1589 	}
1590 
1591 	memcpy(&hdmi_params.codec_params, params,
1592 	       sizeof(hdmi_params.codec_params));
1593 
1594 	mtk_hdmi_audio_set_param(hdmi, &hdmi_params);
1595 
1596 	return 0;
1597 }
1598 
mtk_hdmi_audio_startup(struct device * dev,void * data)1599 static int mtk_hdmi_audio_startup(struct device *dev, void *data)
1600 {
1601 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1602 
1603 	mtk_hdmi_audio_enable(hdmi);
1604 
1605 	return 0;
1606 }
1607 
mtk_hdmi_audio_shutdown(struct device * dev,void * data)1608 static void mtk_hdmi_audio_shutdown(struct device *dev, void *data)
1609 {
1610 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1611 
1612 	mtk_hdmi_audio_disable(hdmi);
1613 }
1614 
1615 static int
mtk_hdmi_audio_mute(struct device * dev,void * data,bool enable,int direction)1616 mtk_hdmi_audio_mute(struct device *dev, void *data,
1617 		    bool enable, int direction)
1618 {
1619 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1620 
1621 	if (enable)
1622 		mtk_hdmi_hw_aud_mute(hdmi);
1623 	else
1624 		mtk_hdmi_hw_aud_unmute(hdmi);
1625 
1626 	return 0;
1627 }
1628 
mtk_hdmi_audio_get_eld(struct device * dev,void * data,uint8_t * buf,size_t len)1629 static int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len)
1630 {
1631 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1632 
1633 	if (hdmi->enabled)
1634 		memcpy(buf, hdmi->curr_conn->eld, min(sizeof(hdmi->curr_conn->eld), len));
1635 	else
1636 		memset(buf, 0, len);
1637 	return 0;
1638 }
1639 
mtk_hdmi_audio_hook_plugged_cb(struct device * dev,void * data,hdmi_codec_plugged_cb fn,struct device * codec_dev)1640 static int mtk_hdmi_audio_hook_plugged_cb(struct device *dev, void *data,
1641 					  hdmi_codec_plugged_cb fn,
1642 					  struct device *codec_dev)
1643 {
1644 	struct mtk_hdmi *hdmi = data;
1645 
1646 	mutex_lock(&hdmi->update_plugged_status_lock);
1647 	hdmi->plugged_cb = fn;
1648 	hdmi->codec_dev = codec_dev;
1649 	mutex_unlock(&hdmi->update_plugged_status_lock);
1650 
1651 	mtk_hdmi_update_plugged_status(hdmi);
1652 
1653 	return 0;
1654 }
1655 
1656 static const struct hdmi_codec_ops mtk_hdmi_audio_codec_ops = {
1657 	.hw_params = mtk_hdmi_audio_hw_params,
1658 	.audio_startup = mtk_hdmi_audio_startup,
1659 	.audio_shutdown = mtk_hdmi_audio_shutdown,
1660 	.mute_stream = mtk_hdmi_audio_mute,
1661 	.get_eld = mtk_hdmi_audio_get_eld,
1662 	.hook_plugged_cb = mtk_hdmi_audio_hook_plugged_cb,
1663 	.no_capture_mute = 1,
1664 };
1665 
mtk_hdmi_register_audio_driver(struct device * dev)1666 static int mtk_hdmi_register_audio_driver(struct device *dev)
1667 {
1668 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1669 	struct hdmi_codec_pdata codec_data = {
1670 		.ops = &mtk_hdmi_audio_codec_ops,
1671 		.max_i2s_channels = 2,
1672 		.i2s = 1,
1673 		.data = hdmi,
1674 	};
1675 	struct platform_device *pdev;
1676 
1677 	pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
1678 					     PLATFORM_DEVID_AUTO, &codec_data,
1679 					     sizeof(codec_data));
1680 	if (IS_ERR(pdev))
1681 		return PTR_ERR(pdev);
1682 
1683 	DRM_INFO("%s driver bound to HDMI\n", HDMI_CODEC_DRV_NAME);
1684 	return 0;
1685 }
1686 
mtk_hdmi_probe(struct platform_device * pdev)1687 static int mtk_hdmi_probe(struct platform_device *pdev)
1688 {
1689 	struct mtk_hdmi *hdmi;
1690 	struct device *dev = &pdev->dev;
1691 	int ret;
1692 
1693 	hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1694 	if (!hdmi)
1695 		return -ENOMEM;
1696 
1697 	hdmi->dev = dev;
1698 	hdmi->conf = of_device_get_match_data(dev);
1699 
1700 	ret = mtk_hdmi_dt_parse_pdata(hdmi, pdev);
1701 	if (ret)
1702 		return ret;
1703 
1704 	hdmi->phy = devm_phy_get(dev, "hdmi");
1705 	if (IS_ERR(hdmi->phy))
1706 		return dev_err_probe(dev, PTR_ERR(hdmi->phy),
1707 				     "Failed to get HDMI PHY\n");
1708 
1709 	mutex_init(&hdmi->update_plugged_status_lock);
1710 	platform_set_drvdata(pdev, hdmi);
1711 
1712 	ret = mtk_hdmi_output_init(hdmi);
1713 	if (ret)
1714 		return dev_err_probe(dev, ret,
1715 				     "Failed to initialize hdmi output\n");
1716 
1717 	ret = mtk_hdmi_register_audio_driver(dev);
1718 	if (ret)
1719 		return dev_err_probe(dev, ret,
1720 				     "Failed to register audio driver\n");
1721 
1722 	hdmi->bridge.funcs = &mtk_hdmi_bridge_funcs;
1723 	hdmi->bridge.of_node = pdev->dev.of_node;
1724 	hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
1725 			 | DRM_BRIDGE_OP_HPD;
1726 	hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1727 	drm_bridge_add(&hdmi->bridge);
1728 
1729 	ret = mtk_hdmi_clk_enable_audio(hdmi);
1730 	if (ret) {
1731 		drm_bridge_remove(&hdmi->bridge);
1732 		return dev_err_probe(dev, ret,
1733 				     "Failed to enable audio clocks\n");
1734 	}
1735 
1736 	return 0;
1737 }
1738 
mtk_hdmi_remove(struct platform_device * pdev)1739 static void mtk_hdmi_remove(struct platform_device *pdev)
1740 {
1741 	struct mtk_hdmi *hdmi = platform_get_drvdata(pdev);
1742 
1743 	drm_bridge_remove(&hdmi->bridge);
1744 	mtk_hdmi_clk_disable_audio(hdmi);
1745 }
1746 
1747 #ifdef CONFIG_PM_SLEEP
mtk_hdmi_suspend(struct device * dev)1748 static int mtk_hdmi_suspend(struct device *dev)
1749 {
1750 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1751 
1752 	mtk_hdmi_clk_disable_audio(hdmi);
1753 
1754 	return 0;
1755 }
1756 
mtk_hdmi_resume(struct device * dev)1757 static int mtk_hdmi_resume(struct device *dev)
1758 {
1759 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
1760 	int ret = 0;
1761 
1762 	ret = mtk_hdmi_clk_enable_audio(hdmi);
1763 	if (ret) {
1764 		dev_err(dev, "hdmi resume failed!\n");
1765 		return ret;
1766 	}
1767 
1768 	return 0;
1769 }
1770 #endif
1771 static SIMPLE_DEV_PM_OPS(mtk_hdmi_pm_ops,
1772 			 mtk_hdmi_suspend, mtk_hdmi_resume);
1773 
1774 static const struct mtk_hdmi_conf mtk_hdmi_conf_mt2701 = {
1775 	.tz_disabled = true,
1776 };
1777 
1778 static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8167 = {
1779 	.max_mode_clock = 148500,
1780 	.cea_modes_only = true,
1781 };
1782 
1783 static const struct of_device_id mtk_hdmi_of_ids[] = {
1784 	{ .compatible = "mediatek,mt2701-hdmi",
1785 	  .data = &mtk_hdmi_conf_mt2701,
1786 	},
1787 	{ .compatible = "mediatek,mt8167-hdmi",
1788 	  .data = &mtk_hdmi_conf_mt8167,
1789 	},
1790 	{ .compatible = "mediatek,mt8173-hdmi",
1791 	},
1792 	{}
1793 };
1794 MODULE_DEVICE_TABLE(of, mtk_hdmi_of_ids);
1795 
1796 static struct platform_driver mtk_hdmi_driver = {
1797 	.probe = mtk_hdmi_probe,
1798 	.remove_new = mtk_hdmi_remove,
1799 	.driver = {
1800 		.name = "mediatek-drm-hdmi",
1801 		.of_match_table = mtk_hdmi_of_ids,
1802 		.pm = &mtk_hdmi_pm_ops,
1803 	},
1804 };
1805 
1806 static struct platform_driver * const mtk_hdmi_drivers[] = {
1807 	&mtk_hdmi_ddc_driver,
1808 	&mtk_cec_driver,
1809 	&mtk_hdmi_driver,
1810 };
1811 
mtk_hdmitx_init(void)1812 static int __init mtk_hdmitx_init(void)
1813 {
1814 	return platform_register_drivers(mtk_hdmi_drivers,
1815 					 ARRAY_SIZE(mtk_hdmi_drivers));
1816 }
1817 
mtk_hdmitx_exit(void)1818 static void __exit mtk_hdmitx_exit(void)
1819 {
1820 	platform_unregister_drivers(mtk_hdmi_drivers,
1821 				    ARRAY_SIZE(mtk_hdmi_drivers));
1822 }
1823 
1824 module_init(mtk_hdmitx_init);
1825 module_exit(mtk_hdmitx_exit);
1826 
1827 MODULE_AUTHOR("Jie Qiu <jie.qiu@mediatek.com>");
1828 MODULE_DESCRIPTION("MediaTek HDMI Driver");
1829 MODULE_LICENSE("GPL v2");
1830