1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
4  */
5 
6 #include <linux/clk.h>
7 #include <linux/mfd/syscon.h>
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <linux/phy/phy.h>
11 #include <linux/regmap.h>
12 
13 #include <drm/bridge/dw_hdmi.h>
14 #include <drm/drm_edid.h>
15 #include <drm/drm_of.h>
16 #include <drm/drm_probe_helper.h>
17 #include <drm/drm_simple_kms_helper.h>
18 
19 #include "rockchip_drm_drv.h"
20 #include "rockchip_drm_vop.h"
21 
22 #define RK3228_GRF_SOC_CON2		0x0408
23 #define RK3228_HDMI_SDAIN_MSK		BIT(14)
24 #define RK3228_HDMI_SCLIN_MSK		BIT(13)
25 #define RK3228_GRF_SOC_CON6		0x0418
26 #define RK3228_HDMI_HPD_VSEL		BIT(6)
27 #define RK3228_HDMI_SDA_VSEL		BIT(5)
28 #define RK3228_HDMI_SCL_VSEL		BIT(4)
29 
30 #define RK3288_GRF_SOC_CON6		0x025C
31 #define RK3288_HDMI_LCDC_SEL		BIT(4)
32 #define RK3328_GRF_SOC_CON2		0x0408
33 
34 #define RK3328_HDMI_SDAIN_MSK		BIT(11)
35 #define RK3328_HDMI_SCLIN_MSK		BIT(10)
36 #define RK3328_HDMI_HPD_IOE		BIT(2)
37 #define RK3328_GRF_SOC_CON3		0x040c
38 /* need to be unset if hdmi or i2c should control voltage */
39 #define RK3328_HDMI_SDA5V_GRF		BIT(15)
40 #define RK3328_HDMI_SCL5V_GRF		BIT(14)
41 #define RK3328_HDMI_HPD5V_GRF		BIT(13)
42 #define RK3328_HDMI_CEC5V_GRF		BIT(12)
43 #define RK3328_GRF_SOC_CON4		0x0410
44 #define RK3328_HDMI_HPD_SARADC		BIT(13)
45 #define RK3328_HDMI_CEC_5V		BIT(11)
46 #define RK3328_HDMI_SDA_5V		BIT(10)
47 #define RK3328_HDMI_SCL_5V		BIT(9)
48 #define RK3328_HDMI_HPD_5V		BIT(8)
49 
50 #define RK3399_GRF_SOC_CON20		0x6250
51 #define RK3399_HDMI_LCDC_SEL		BIT(6)
52 
53 #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
54 
55 /**
56  * struct rockchip_hdmi_chip_data - splite the grf setting of kind of chips
57  * @lcdsel_grf_reg: grf register offset of lcdc select
58  * @lcdsel_big: reg value of selecting vop big for HDMI
59  * @lcdsel_lit: reg value of selecting vop little for HDMI
60  */
61 struct rockchip_hdmi_chip_data {
62 	int	lcdsel_grf_reg;
63 	u32	lcdsel_big;
64 	u32	lcdsel_lit;
65 };
66 
67 struct rockchip_hdmi {
68 	struct device *dev;
69 	struct regmap *regmap;
70 	struct drm_encoder encoder;
71 	const struct rockchip_hdmi_chip_data *chip_data;
72 	struct clk *vpll_clk;
73 	struct clk *grf_clk;
74 	struct dw_hdmi *hdmi;
75 	struct phy *phy;
76 };
77 
78 #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
79 
80 static const struct dw_hdmi_mpll_config rockchip_mpll_cfg[] = {
81 	{
82 		27000000, {
83 			{ 0x00b3, 0x0000},
84 			{ 0x2153, 0x0000},
85 			{ 0x40f3, 0x0000}
86 		},
87 	}, {
88 		36000000, {
89 			{ 0x00b3, 0x0000},
90 			{ 0x2153, 0x0000},
91 			{ 0x40f3, 0x0000}
92 		},
93 	}, {
94 		40000000, {
95 			{ 0x00b3, 0x0000},
96 			{ 0x2153, 0x0000},
97 			{ 0x40f3, 0x0000}
98 		},
99 	}, {
100 		54000000, {
101 			{ 0x0072, 0x0001},
102 			{ 0x2142, 0x0001},
103 			{ 0x40a2, 0x0001},
104 		},
105 	}, {
106 		65000000, {
107 			{ 0x0072, 0x0001},
108 			{ 0x2142, 0x0001},
109 			{ 0x40a2, 0x0001},
110 		},
111 	}, {
112 		66000000, {
113 			{ 0x013e, 0x0003},
114 			{ 0x217e, 0x0002},
115 			{ 0x4061, 0x0002}
116 		},
117 	}, {
118 		74250000, {
119 			{ 0x0072, 0x0001},
120 			{ 0x2145, 0x0002},
121 			{ 0x4061, 0x0002}
122 		},
123 	}, {
124 		83500000, {
125 			{ 0x0072, 0x0001},
126 		},
127 	}, {
128 		108000000, {
129 			{ 0x0051, 0x0002},
130 			{ 0x2145, 0x0002},
131 			{ 0x4061, 0x0002}
132 		},
133 	}, {
134 		106500000, {
135 			{ 0x0051, 0x0002},
136 			{ 0x2145, 0x0002},
137 			{ 0x4061, 0x0002}
138 		},
139 	}, {
140 		146250000, {
141 			{ 0x0051, 0x0002},
142 			{ 0x2145, 0x0002},
143 			{ 0x4061, 0x0002}
144 		},
145 	}, {
146 		148500000, {
147 			{ 0x0051, 0x0003},
148 			{ 0x214c, 0x0003},
149 			{ 0x4064, 0x0003}
150 		},
151 	}, {
152 		~0UL, {
153 			{ 0x00a0, 0x000a },
154 			{ 0x2001, 0x000f },
155 			{ 0x4002, 0x000f },
156 		},
157 	}
158 };
159 
160 static const struct dw_hdmi_curr_ctrl rockchip_cur_ctr[] = {
161 	/*      pixelclk    bpp8    bpp10   bpp12 */
162 	{
163 		40000000,  { 0x0018, 0x0018, 0x0018 },
164 	}, {
165 		65000000,  { 0x0028, 0x0028, 0x0028 },
166 	}, {
167 		66000000,  { 0x0038, 0x0038, 0x0038 },
168 	}, {
169 		74250000,  { 0x0028, 0x0038, 0x0038 },
170 	}, {
171 		83500000,  { 0x0028, 0x0038, 0x0038 },
172 	}, {
173 		146250000, { 0x0038, 0x0038, 0x0038 },
174 	}, {
175 		148500000, { 0x0000, 0x0038, 0x0038 },
176 	}, {
177 		~0UL,      { 0x0000, 0x0000, 0x0000},
178 	}
179 };
180 
181 static const struct dw_hdmi_phy_config rockchip_phy_config[] = {
182 	/*pixelclk   symbol   term   vlev*/
183 	{ 74250000,  0x8009, 0x0004, 0x0272},
184 	{ 148500000, 0x802b, 0x0004, 0x028d},
185 	{ 297000000, 0x8039, 0x0005, 0x028d},
186 	{ ~0UL,	     0x0000, 0x0000, 0x0000}
187 };
188 
189 static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi)
190 {
191 	struct device_node *np = hdmi->dev->of_node;
192 
193 	hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
194 	if (IS_ERR(hdmi->regmap)) {
195 		DRM_DEV_ERROR(hdmi->dev, "Unable to get rockchip,grf\n");
196 		return PTR_ERR(hdmi->regmap);
197 	}
198 
199 	hdmi->vpll_clk = devm_clk_get(hdmi->dev, "vpll");
200 	if (PTR_ERR(hdmi->vpll_clk) == -ENOENT) {
201 		hdmi->vpll_clk = NULL;
202 	} else if (PTR_ERR(hdmi->vpll_clk) == -EPROBE_DEFER) {
203 		return -EPROBE_DEFER;
204 	} else if (IS_ERR(hdmi->vpll_clk)) {
205 		DRM_DEV_ERROR(hdmi->dev, "failed to get grf clock\n");
206 		return PTR_ERR(hdmi->vpll_clk);
207 	}
208 
209 	hdmi->grf_clk = devm_clk_get(hdmi->dev, "grf");
210 	if (PTR_ERR(hdmi->grf_clk) == -ENOENT) {
211 		hdmi->grf_clk = NULL;
212 	} else if (PTR_ERR(hdmi->grf_clk) == -EPROBE_DEFER) {
213 		return -EPROBE_DEFER;
214 	} else if (IS_ERR(hdmi->grf_clk)) {
215 		DRM_DEV_ERROR(hdmi->dev, "failed to get grf clock\n");
216 		return PTR_ERR(hdmi->grf_clk);
217 	}
218 
219 	return 0;
220 }
221 
222 static enum drm_mode_status
223 dw_hdmi_rockchip_mode_valid(struct dw_hdmi *hdmi, void *data,
224 			    const struct drm_display_info *info,
225 			    const struct drm_display_mode *mode)
226 {
227 	const struct dw_hdmi_mpll_config *mpll_cfg = rockchip_mpll_cfg;
228 	int pclk = mode->clock * 1000;
229 	bool valid = false;
230 	int i;
231 
232 	for (i = 0; mpll_cfg[i].mpixelclock != (~0UL); i++) {
233 		if (pclk == mpll_cfg[i].mpixelclock) {
234 			valid = true;
235 			break;
236 		}
237 	}
238 
239 	return (valid) ? MODE_OK : MODE_BAD;
240 }
241 
242 static void dw_hdmi_rockchip_encoder_disable(struct drm_encoder *encoder)
243 {
244 }
245 
246 static bool
247 dw_hdmi_rockchip_encoder_mode_fixup(struct drm_encoder *encoder,
248 				    const struct drm_display_mode *mode,
249 				    struct drm_display_mode *adj_mode)
250 {
251 	return true;
252 }
253 
254 static void dw_hdmi_rockchip_encoder_mode_set(struct drm_encoder *encoder,
255 					      struct drm_display_mode *mode,
256 					      struct drm_display_mode *adj_mode)
257 {
258 	struct rockchip_hdmi *hdmi = to_rockchip_hdmi(encoder);
259 
260 	clk_set_rate(hdmi->vpll_clk, adj_mode->clock * 1000);
261 }
262 
263 static void dw_hdmi_rockchip_encoder_enable(struct drm_encoder *encoder)
264 {
265 	struct rockchip_hdmi *hdmi = to_rockchip_hdmi(encoder);
266 	u32 val;
267 	int ret;
268 
269 	if (hdmi->chip_data->lcdsel_grf_reg < 0)
270 		return;
271 
272 	ret = drm_of_encoder_active_endpoint_id(hdmi->dev->of_node, encoder);
273 	if (ret)
274 		val = hdmi->chip_data->lcdsel_lit;
275 	else
276 		val = hdmi->chip_data->lcdsel_big;
277 
278 	ret = clk_prepare_enable(hdmi->grf_clk);
279 	if (ret < 0) {
280 		DRM_DEV_ERROR(hdmi->dev, "failed to enable grfclk %d\n", ret);
281 		return;
282 	}
283 
284 	ret = regmap_write(hdmi->regmap, hdmi->chip_data->lcdsel_grf_reg, val);
285 	if (ret != 0)
286 		DRM_DEV_ERROR(hdmi->dev, "Could not write to GRF: %d\n", ret);
287 
288 	clk_disable_unprepare(hdmi->grf_clk);
289 	DRM_DEV_DEBUG(hdmi->dev, "vop %s output to hdmi\n",
290 		      ret ? "LIT" : "BIG");
291 }
292 
293 static int
294 dw_hdmi_rockchip_encoder_atomic_check(struct drm_encoder *encoder,
295 				      struct drm_crtc_state *crtc_state,
296 				      struct drm_connector_state *conn_state)
297 {
298 	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
299 
300 	s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
301 	s->output_type = DRM_MODE_CONNECTOR_HDMIA;
302 
303 	return 0;
304 }
305 
306 static const struct drm_encoder_helper_funcs dw_hdmi_rockchip_encoder_helper_funcs = {
307 	.mode_fixup = dw_hdmi_rockchip_encoder_mode_fixup,
308 	.mode_set   = dw_hdmi_rockchip_encoder_mode_set,
309 	.enable     = dw_hdmi_rockchip_encoder_enable,
310 	.disable    = dw_hdmi_rockchip_encoder_disable,
311 	.atomic_check = dw_hdmi_rockchip_encoder_atomic_check,
312 };
313 
314 static int dw_hdmi_rockchip_genphy_init(struct dw_hdmi *dw_hdmi, void *data,
315 					const struct drm_display_info *display,
316 					const struct drm_display_mode *mode)
317 {
318 	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
319 
320 	return phy_power_on(hdmi->phy);
321 }
322 
323 static void dw_hdmi_rockchip_genphy_disable(struct dw_hdmi *dw_hdmi, void *data)
324 {
325 	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
326 
327 	phy_power_off(hdmi->phy);
328 }
329 
330 static void dw_hdmi_rk3228_setup_hpd(struct dw_hdmi *dw_hdmi, void *data)
331 {
332 	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
333 
334 	dw_hdmi_phy_setup_hpd(dw_hdmi, data);
335 
336 	regmap_write(hdmi->regmap,
337 		RK3228_GRF_SOC_CON6,
338 		HIWORD_UPDATE(RK3228_HDMI_HPD_VSEL | RK3228_HDMI_SDA_VSEL |
339 			      RK3228_HDMI_SCL_VSEL,
340 			      RK3228_HDMI_HPD_VSEL | RK3228_HDMI_SDA_VSEL |
341 			      RK3228_HDMI_SCL_VSEL));
342 
343 	regmap_write(hdmi->regmap,
344 		RK3228_GRF_SOC_CON2,
345 		HIWORD_UPDATE(RK3228_HDMI_SDAIN_MSK | RK3228_HDMI_SCLIN_MSK,
346 			      RK3228_HDMI_SDAIN_MSK | RK3228_HDMI_SCLIN_MSK));
347 }
348 
349 static enum drm_connector_status
350 dw_hdmi_rk3328_read_hpd(struct dw_hdmi *dw_hdmi, void *data)
351 {
352 	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
353 	enum drm_connector_status status;
354 
355 	status = dw_hdmi_phy_read_hpd(dw_hdmi, data);
356 
357 	if (status == connector_status_connected)
358 		regmap_write(hdmi->regmap,
359 			RK3328_GRF_SOC_CON4,
360 			HIWORD_UPDATE(RK3328_HDMI_SDA_5V | RK3328_HDMI_SCL_5V,
361 				      RK3328_HDMI_SDA_5V | RK3328_HDMI_SCL_5V));
362 	else
363 		regmap_write(hdmi->regmap,
364 			RK3328_GRF_SOC_CON4,
365 			HIWORD_UPDATE(0, RK3328_HDMI_SDA_5V |
366 					 RK3328_HDMI_SCL_5V));
367 	return status;
368 }
369 
370 static void dw_hdmi_rk3328_setup_hpd(struct dw_hdmi *dw_hdmi, void *data)
371 {
372 	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
373 
374 	dw_hdmi_phy_setup_hpd(dw_hdmi, data);
375 
376 	/* Enable and map pins to 3V grf-controlled io-voltage */
377 	regmap_write(hdmi->regmap,
378 		RK3328_GRF_SOC_CON4,
379 		HIWORD_UPDATE(0, RK3328_HDMI_HPD_SARADC | RK3328_HDMI_CEC_5V |
380 				 RK3328_HDMI_SDA_5V | RK3328_HDMI_SCL_5V |
381 				 RK3328_HDMI_HPD_5V));
382 	regmap_write(hdmi->regmap,
383 		RK3328_GRF_SOC_CON3,
384 		HIWORD_UPDATE(0, RK3328_HDMI_SDA5V_GRF | RK3328_HDMI_SCL5V_GRF |
385 				 RK3328_HDMI_HPD5V_GRF |
386 				 RK3328_HDMI_CEC5V_GRF));
387 	regmap_write(hdmi->regmap,
388 		RK3328_GRF_SOC_CON2,
389 		HIWORD_UPDATE(RK3328_HDMI_SDAIN_MSK | RK3328_HDMI_SCLIN_MSK,
390 			      RK3328_HDMI_SDAIN_MSK | RK3328_HDMI_SCLIN_MSK |
391 			      RK3328_HDMI_HPD_IOE));
392 }
393 
394 static const struct dw_hdmi_phy_ops rk3228_hdmi_phy_ops = {
395 	.init		= dw_hdmi_rockchip_genphy_init,
396 	.disable	= dw_hdmi_rockchip_genphy_disable,
397 	.read_hpd	= dw_hdmi_phy_read_hpd,
398 	.update_hpd	= dw_hdmi_phy_update_hpd,
399 	.setup_hpd	= dw_hdmi_rk3228_setup_hpd,
400 };
401 
402 static struct rockchip_hdmi_chip_data rk3228_chip_data = {
403 	.lcdsel_grf_reg = -1,
404 };
405 
406 static const struct dw_hdmi_plat_data rk3228_hdmi_drv_data = {
407 	.mode_valid = dw_hdmi_rockchip_mode_valid,
408 	.mpll_cfg = rockchip_mpll_cfg,
409 	.cur_ctr = rockchip_cur_ctr,
410 	.phy_config = rockchip_phy_config,
411 	.phy_data = &rk3228_chip_data,
412 	.phy_ops = &rk3228_hdmi_phy_ops,
413 	.phy_name = "inno_dw_hdmi_phy2",
414 	.phy_force_vendor = true,
415 };
416 
417 static struct rockchip_hdmi_chip_data rk3288_chip_data = {
418 	.lcdsel_grf_reg = RK3288_GRF_SOC_CON6,
419 	.lcdsel_big = HIWORD_UPDATE(0, RK3288_HDMI_LCDC_SEL),
420 	.lcdsel_lit = HIWORD_UPDATE(RK3288_HDMI_LCDC_SEL, RK3288_HDMI_LCDC_SEL),
421 };
422 
423 static const struct dw_hdmi_plat_data rk3288_hdmi_drv_data = {
424 	.mode_valid = dw_hdmi_rockchip_mode_valid,
425 	.mpll_cfg   = rockchip_mpll_cfg,
426 	.cur_ctr    = rockchip_cur_ctr,
427 	.phy_config = rockchip_phy_config,
428 	.phy_data = &rk3288_chip_data,
429 };
430 
431 static const struct dw_hdmi_phy_ops rk3328_hdmi_phy_ops = {
432 	.init		= dw_hdmi_rockchip_genphy_init,
433 	.disable	= dw_hdmi_rockchip_genphy_disable,
434 	.read_hpd	= dw_hdmi_rk3328_read_hpd,
435 	.update_hpd	= dw_hdmi_phy_update_hpd,
436 	.setup_hpd	= dw_hdmi_rk3328_setup_hpd,
437 };
438 
439 static struct rockchip_hdmi_chip_data rk3328_chip_data = {
440 	.lcdsel_grf_reg = -1,
441 };
442 
443 static const struct dw_hdmi_plat_data rk3328_hdmi_drv_data = {
444 	.mode_valid = dw_hdmi_rockchip_mode_valid,
445 	.mpll_cfg = rockchip_mpll_cfg,
446 	.cur_ctr = rockchip_cur_ctr,
447 	.phy_config = rockchip_phy_config,
448 	.phy_data = &rk3328_chip_data,
449 	.phy_ops = &rk3328_hdmi_phy_ops,
450 	.phy_name = "inno_dw_hdmi_phy2",
451 	.phy_force_vendor = true,
452 	.use_drm_infoframe = true,
453 };
454 
455 static struct rockchip_hdmi_chip_data rk3399_chip_data = {
456 	.lcdsel_grf_reg = RK3399_GRF_SOC_CON20,
457 	.lcdsel_big = HIWORD_UPDATE(0, RK3399_HDMI_LCDC_SEL),
458 	.lcdsel_lit = HIWORD_UPDATE(RK3399_HDMI_LCDC_SEL, RK3399_HDMI_LCDC_SEL),
459 };
460 
461 static const struct dw_hdmi_plat_data rk3399_hdmi_drv_data = {
462 	.mode_valid = dw_hdmi_rockchip_mode_valid,
463 	.mpll_cfg   = rockchip_mpll_cfg,
464 	.cur_ctr    = rockchip_cur_ctr,
465 	.phy_config = rockchip_phy_config,
466 	.phy_data = &rk3399_chip_data,
467 	.use_drm_infoframe = true,
468 };
469 
470 static const struct of_device_id dw_hdmi_rockchip_dt_ids[] = {
471 	{ .compatible = "rockchip,rk3228-dw-hdmi",
472 	  .data = &rk3228_hdmi_drv_data
473 	},
474 	{ .compatible = "rockchip,rk3288-dw-hdmi",
475 	  .data = &rk3288_hdmi_drv_data
476 	},
477 	{ .compatible = "rockchip,rk3328-dw-hdmi",
478 	  .data = &rk3328_hdmi_drv_data
479 	},
480 	{ .compatible = "rockchip,rk3399-dw-hdmi",
481 	  .data = &rk3399_hdmi_drv_data
482 	},
483 	{},
484 };
485 MODULE_DEVICE_TABLE(of, dw_hdmi_rockchip_dt_ids);
486 
487 static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
488 				 void *data)
489 {
490 	struct platform_device *pdev = to_platform_device(dev);
491 	struct dw_hdmi_plat_data *plat_data;
492 	const struct of_device_id *match;
493 	struct drm_device *drm = data;
494 	struct drm_encoder *encoder;
495 	struct rockchip_hdmi *hdmi;
496 	int ret;
497 
498 	if (!pdev->dev.of_node)
499 		return -ENODEV;
500 
501 	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
502 	if (!hdmi)
503 		return -ENOMEM;
504 
505 	match = of_match_node(dw_hdmi_rockchip_dt_ids, pdev->dev.of_node);
506 	plat_data = devm_kmemdup(&pdev->dev, match->data,
507 					     sizeof(*plat_data), GFP_KERNEL);
508 	if (!plat_data)
509 		return -ENOMEM;
510 
511 	hdmi->dev = &pdev->dev;
512 	hdmi->chip_data = plat_data->phy_data;
513 	plat_data->phy_data = hdmi;
514 	encoder = &hdmi->encoder;
515 
516 	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
517 	/*
518 	 * If we failed to find the CRTC(s) which this encoder is
519 	 * supposed to be connected to, it's because the CRTC has
520 	 * not been registered yet.  Defer probing, and hope that
521 	 * the required CRTC is added later.
522 	 */
523 	if (encoder->possible_crtcs == 0)
524 		return -EPROBE_DEFER;
525 
526 	ret = rockchip_hdmi_parse_dt(hdmi);
527 	if (ret) {
528 		DRM_DEV_ERROR(hdmi->dev, "Unable to parse OF data\n");
529 		return ret;
530 	}
531 
532 	ret = clk_prepare_enable(hdmi->vpll_clk);
533 	if (ret) {
534 		DRM_DEV_ERROR(hdmi->dev, "Failed to enable HDMI vpll: %d\n",
535 			      ret);
536 		return ret;
537 	}
538 
539 	hdmi->phy = devm_phy_optional_get(dev, "hdmi");
540 	if (IS_ERR(hdmi->phy)) {
541 		ret = PTR_ERR(hdmi->phy);
542 		if (ret != -EPROBE_DEFER)
543 			DRM_DEV_ERROR(hdmi->dev, "failed to get phy\n");
544 		return ret;
545 	}
546 
547 	drm_encoder_helper_add(encoder, &dw_hdmi_rockchip_encoder_helper_funcs);
548 	drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);
549 
550 	platform_set_drvdata(pdev, hdmi);
551 
552 	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
553 
554 	/*
555 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
556 	 * which would have called the encoder cleanup.  Do it manually.
557 	 */
558 	if (IS_ERR(hdmi->hdmi)) {
559 		ret = PTR_ERR(hdmi->hdmi);
560 		drm_encoder_cleanup(encoder);
561 		clk_disable_unprepare(hdmi->vpll_clk);
562 	}
563 
564 	return ret;
565 }
566 
567 static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
568 				    void *data)
569 {
570 	struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
571 
572 	dw_hdmi_unbind(hdmi->hdmi);
573 	clk_disable_unprepare(hdmi->vpll_clk);
574 }
575 
576 static const struct component_ops dw_hdmi_rockchip_ops = {
577 	.bind	= dw_hdmi_rockchip_bind,
578 	.unbind	= dw_hdmi_rockchip_unbind,
579 };
580 
581 static int dw_hdmi_rockchip_probe(struct platform_device *pdev)
582 {
583 	return component_add(&pdev->dev, &dw_hdmi_rockchip_ops);
584 }
585 
586 static int dw_hdmi_rockchip_remove(struct platform_device *pdev)
587 {
588 	component_del(&pdev->dev, &dw_hdmi_rockchip_ops);
589 
590 	return 0;
591 }
592 
593 static int __maybe_unused dw_hdmi_rockchip_resume(struct device *dev)
594 {
595 	struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
596 
597 	dw_hdmi_resume(hdmi->hdmi);
598 
599 	return 0;
600 }
601 
602 static const struct dev_pm_ops dw_hdmi_rockchip_pm = {
603 	SET_SYSTEM_SLEEP_PM_OPS(NULL, dw_hdmi_rockchip_resume)
604 };
605 
606 struct platform_driver dw_hdmi_rockchip_pltfm_driver = {
607 	.probe  = dw_hdmi_rockchip_probe,
608 	.remove = dw_hdmi_rockchip_remove,
609 	.driver = {
610 		.name = "dwhdmi-rockchip",
611 		.pm = &dw_hdmi_rockchip_pm,
612 		.of_match_table = dw_hdmi_rockchip_dt_ids,
613 	},
614 };
615