xref: /linux/drivers/gpu/drm/rockchip/rockchip_lvds.c (revision db5d28c0bfe566908719bec8e25443aabecbb802)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4  * Author:
5  *      Mark Yao <mark.yao@rock-chips.com>
6  *      Sandy Huang <hjc@rock-chips.com>
7  */
8 
9 #include <linux/clk.h>
10 #include <linux/component.h>
11 #include <linux/mfd/syscon.h>
12 #include <linux/of_graph.h>
13 #include <linux/phy/phy.h>
14 #include <linux/pinctrl/devinfo.h>
15 #include <linux/platform_device.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/regmap.h>
18 #include <linux/reset.h>
19 
20 #include <drm/drm_atomic_helper.h>
21 #include <drm/drm_bridge.h>
22 #include <drm/drm_bridge_connector.h>
23 #include <drm/drm_of.h>
24 #include <drm/drm_panel.h>
25 #include <drm/drm_probe_helper.h>
26 #include <drm/drm_simple_kms_helper.h>
27 
28 #include "rockchip_drm_drv.h"
29 #include "rockchip_lvds.h"
30 
31 #define DISPLAY_OUTPUT_RGB		0
32 #define DISPLAY_OUTPUT_LVDS		1
33 #define DISPLAY_OUTPUT_DUAL_LVDS	2
34 
35 struct rockchip_lvds;
36 
37 /**
38  * struct rockchip_lvds_soc_data - rockchip lvds Soc private data
39  * @probe: LVDS platform probe function
40  * @helper_funcs: LVDS connector helper functions
41  */
42 struct rockchip_lvds_soc_data {
43 	int (*probe)(struct platform_device *pdev, struct rockchip_lvds *lvds);
44 	const struct drm_encoder_helper_funcs *helper_funcs;
45 };
46 
47 struct rockchip_lvds {
48 	struct device *dev;
49 	void __iomem *regs;
50 	struct regmap *grf;
51 	struct clk *pclk;
52 	struct phy *dphy;
53 	const struct rockchip_lvds_soc_data *soc_data;
54 	int output; /* rgb lvds or dual lvds output */
55 	int format; /* vesa or jeida format */
56 	struct drm_device *drm_dev;
57 	struct drm_panel *panel;
58 	struct drm_bridge *bridge;
59 	struct drm_connector connector;
60 	struct rockchip_encoder encoder;
61 	struct dev_pin_info *pins;
62 };
63 
connector_to_lvds(struct drm_connector * connector)64 static inline struct rockchip_lvds *connector_to_lvds(struct drm_connector *connector)
65 {
66 	return container_of(connector, struct rockchip_lvds, connector);
67 }
68 
encoder_to_lvds(struct drm_encoder * encoder)69 static inline struct rockchip_lvds *encoder_to_lvds(struct drm_encoder *encoder)
70 {
71 	struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
72 
73 	return container_of(rkencoder, struct rockchip_lvds, encoder);
74 }
75 
rk3288_writel(struct rockchip_lvds * lvds,u32 offset,u32 val)76 static inline void rk3288_writel(struct rockchip_lvds *lvds, u32 offset,
77 				 u32 val)
78 {
79 	writel_relaxed(val, lvds->regs + offset);
80 	if (lvds->output == DISPLAY_OUTPUT_LVDS)
81 		return;
82 	writel_relaxed(val, lvds->regs + offset + RK3288_LVDS_CH1_OFFSET);
83 }
84 
rockchip_lvds_name_to_format(const char * s)85 static inline int rockchip_lvds_name_to_format(const char *s)
86 {
87 	if (strncmp(s, "jeida-18", 8) == 0)
88 		return LVDS_JEIDA_18;
89 	else if (strncmp(s, "jeida-24", 8) == 0)
90 		return LVDS_JEIDA_24;
91 	else if (strncmp(s, "vesa-24", 7) == 0)
92 		return LVDS_VESA_24;
93 
94 	return -EINVAL;
95 }
96 
rockchip_lvds_name_to_output(const char * s)97 static inline int rockchip_lvds_name_to_output(const char *s)
98 {
99 	if (strncmp(s, "rgb", 3) == 0)
100 		return DISPLAY_OUTPUT_RGB;
101 	else if (strncmp(s, "lvds", 4) == 0)
102 		return DISPLAY_OUTPUT_LVDS;
103 	else if (strncmp(s, "duallvds", 8) == 0)
104 		return DISPLAY_OUTPUT_DUAL_LVDS;
105 
106 	return -EINVAL;
107 }
108 
109 static const struct drm_connector_funcs rockchip_lvds_connector_funcs = {
110 	.fill_modes = drm_helper_probe_single_connector_modes,
111 	.destroy = drm_connector_cleanup,
112 	.reset = drm_atomic_helper_connector_reset,
113 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
114 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
115 };
116 
rockchip_lvds_connector_get_modes(struct drm_connector * connector)117 static int rockchip_lvds_connector_get_modes(struct drm_connector *connector)
118 {
119 	struct rockchip_lvds *lvds = connector_to_lvds(connector);
120 	struct drm_panel *panel = lvds->panel;
121 
122 	return drm_panel_get_modes(panel, connector);
123 }
124 
125 static const
126 struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
127 	.get_modes = rockchip_lvds_connector_get_modes,
128 };
129 
130 static int
rockchip_lvds_encoder_atomic_check(struct drm_encoder * encoder,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state)131 rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder,
132 				   struct drm_crtc_state *crtc_state,
133 				   struct drm_connector_state *conn_state)
134 {
135 	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
136 
137 	s->output_mode = ROCKCHIP_OUT_MODE_P888;
138 	s->output_type = DRM_MODE_CONNECTOR_LVDS;
139 
140 	return 0;
141 }
142 
rk3288_lvds_poweron(struct rockchip_lvds * lvds)143 static int rk3288_lvds_poweron(struct rockchip_lvds *lvds)
144 {
145 	int ret;
146 	u32 val;
147 
148 	ret = clk_enable(lvds->pclk);
149 	if (ret < 0) {
150 		DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret);
151 		return ret;
152 	}
153 	ret = pm_runtime_resume_and_get(lvds->dev);
154 	if (ret < 0) {
155 		DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
156 		clk_disable(lvds->pclk);
157 		return ret;
158 	}
159 	val = RK3288_LVDS_CH0_REG0_LANE4_EN | RK3288_LVDS_CH0_REG0_LANE3_EN |
160 		RK3288_LVDS_CH0_REG0_LANE2_EN | RK3288_LVDS_CH0_REG0_LANE1_EN |
161 		RK3288_LVDS_CH0_REG0_LANE0_EN;
162 	if (lvds->output == DISPLAY_OUTPUT_RGB) {
163 		val |= RK3288_LVDS_CH0_REG0_TTL_EN |
164 			RK3288_LVDS_CH0_REG0_LANECK_EN;
165 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
166 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
167 			      RK3288_LVDS_PLL_FBDIV_REG2(0x46));
168 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG4,
169 			      RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
170 			      RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
171 			      RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
172 			      RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
173 			      RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
174 			      RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
175 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG5,
176 			      RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
177 			      RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
178 			      RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
179 			      RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
180 			      RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
181 			      RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
182 	} else {
183 		val |= RK3288_LVDS_CH0_REG0_LVDS_EN |
184 			    RK3288_LVDS_CH0_REG0_LANECK_EN;
185 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
186 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG1,
187 			      RK3288_LVDS_CH0_REG1_LANECK_BIAS |
188 			      RK3288_LVDS_CH0_REG1_LANE4_BIAS |
189 			      RK3288_LVDS_CH0_REG1_LANE3_BIAS |
190 			      RK3288_LVDS_CH0_REG1_LANE2_BIAS |
191 			      RK3288_LVDS_CH0_REG1_LANE1_BIAS |
192 			      RK3288_LVDS_CH0_REG1_LANE0_BIAS);
193 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
194 			      RK3288_LVDS_CH0_REG2_RESERVE_ON |
195 			      RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
196 			      RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
197 			      RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
198 			      RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
199 			      RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
200 			      RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
201 			      RK3288_LVDS_PLL_FBDIV_REG2(0x46));
202 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00);
203 		rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00);
204 	}
205 	rk3288_writel(lvds, RK3288_LVDS_CH0_REG3,
206 		      RK3288_LVDS_PLL_FBDIV_REG3(0x46));
207 	rk3288_writel(lvds, RK3288_LVDS_CH0_REGD,
208 		      RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
209 	rk3288_writel(lvds, RK3288_LVDS_CH0_REG20,
210 		      RK3288_LVDS_CH0_REG20_LSB);
211 
212 	rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
213 		      RK3288_LVDS_CFG_REGC_PLL_ENABLE);
214 	rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
215 		      RK3288_LVDS_CFG_REG21_TX_ENABLE);
216 
217 	return 0;
218 }
219 
rk3288_lvds_poweroff(struct rockchip_lvds * lvds)220 static void rk3288_lvds_poweroff(struct rockchip_lvds *lvds)
221 {
222 	int ret;
223 	u32 val;
224 
225 	rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
226 		      RK3288_LVDS_CFG_REG21_TX_ENABLE);
227 	rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
228 		      RK3288_LVDS_CFG_REGC_PLL_ENABLE);
229 	val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN;
230 	val |= val << 16;
231 	ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
232 	if (ret != 0)
233 		DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
234 
235 	pm_runtime_put(lvds->dev);
236 	clk_disable(lvds->pclk);
237 }
238 
rk3288_lvds_grf_config(struct drm_encoder * encoder,struct drm_display_mode * mode)239 static int rk3288_lvds_grf_config(struct drm_encoder *encoder,
240 				  struct drm_display_mode *mode)
241 {
242 	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
243 	u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0;
244 	u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0;
245 	u32 val;
246 	int ret;
247 
248 	/* iomux to LCD data/sync mode */
249 	if (lvds->output == DISPLAY_OUTPUT_RGB)
250 		if (lvds->pins && !IS_ERR(lvds->pins->default_state))
251 			pinctrl_select_state(lvds->pins->p,
252 					     lvds->pins->default_state);
253 	val = lvds->format | LVDS_CH0_EN;
254 	if (lvds->output == DISPLAY_OUTPUT_RGB)
255 		val |= LVDS_TTL_EN | LVDS_CH1_EN;
256 	else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS)
257 		val |= LVDS_DUAL | LVDS_CH1_EN;
258 
259 	if ((mode->htotal - mode->hsync_start) & 0x01)
260 		val |= LVDS_START_PHASE_RST_1;
261 
262 	val |= (pin_dclk << 8) | (pin_hsync << 9);
263 	val |= (0xffff << 16);
264 	ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
265 	if (ret)
266 		DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
267 
268 	return ret;
269 }
270 
rk3288_lvds_set_vop_source(struct rockchip_lvds * lvds,struct drm_encoder * encoder)271 static int rk3288_lvds_set_vop_source(struct rockchip_lvds *lvds,
272 				      struct drm_encoder *encoder)
273 {
274 	u32 val;
275 	int ret;
276 
277 	ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
278 	if (ret < 0)
279 		return ret;
280 
281 	val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
282 	if (ret)
283 		val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT;
284 
285 	ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON6, val);
286 	if (ret < 0)
287 		return ret;
288 
289 	return 0;
290 }
291 
rk3288_lvds_encoder_enable(struct drm_encoder * encoder)292 static void rk3288_lvds_encoder_enable(struct drm_encoder *encoder)
293 {
294 	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
295 	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
296 	int ret;
297 
298 	drm_panel_prepare(lvds->panel);
299 
300 	ret = rk3288_lvds_poweron(lvds);
301 	if (ret < 0) {
302 		DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
303 		drm_panel_unprepare(lvds->panel);
304 		return;
305 	}
306 
307 	ret = rk3288_lvds_grf_config(encoder, mode);
308 	if (ret) {
309 		DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
310 		drm_panel_unprepare(lvds->panel);
311 		return;
312 	}
313 
314 	ret = rk3288_lvds_set_vop_source(lvds, encoder);
315 	if (ret) {
316 		DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
317 		drm_panel_unprepare(lvds->panel);
318 		return;
319 	}
320 
321 	drm_panel_enable(lvds->panel);
322 }
323 
rk3288_lvds_encoder_disable(struct drm_encoder * encoder)324 static void rk3288_lvds_encoder_disable(struct drm_encoder *encoder)
325 {
326 	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
327 
328 	drm_panel_disable(lvds->panel);
329 	rk3288_lvds_poweroff(lvds);
330 	drm_panel_unprepare(lvds->panel);
331 }
332 
px30_lvds_poweron(struct rockchip_lvds * lvds)333 static int px30_lvds_poweron(struct rockchip_lvds *lvds)
334 {
335 	int ret;
336 
337 	ret = pm_runtime_resume_and_get(lvds->dev);
338 	if (ret < 0) {
339 		DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
340 		return ret;
341 	}
342 
343 	/* Enable LVDS mode */
344 	ret = regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
345 				  PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
346 				  PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1));
347 	if (ret)
348 		pm_runtime_put(lvds->dev);
349 
350 	return ret;
351 }
352 
px30_lvds_poweroff(struct rockchip_lvds * lvds)353 static void px30_lvds_poweroff(struct rockchip_lvds *lvds)
354 {
355 	regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
356 			   PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
357 			   PX30_LVDS_MODE_EN(0) | PX30_LVDS_P2S_EN(0));
358 
359 	pm_runtime_put(lvds->dev);
360 }
361 
px30_lvds_grf_config(struct drm_encoder * encoder,struct drm_display_mode * mode)362 static int px30_lvds_grf_config(struct drm_encoder *encoder,
363 				struct drm_display_mode *mode)
364 {
365 	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
366 
367 	if (lvds->output != DISPLAY_OUTPUT_LVDS) {
368 		DRM_DEV_ERROR(lvds->dev, "Unsupported display output %d\n",
369 			      lvds->output);
370 		return -EINVAL;
371 	}
372 
373 	/* Set format */
374 	return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
375 				  PX30_LVDS_FORMAT(lvds->format),
376 				  PX30_LVDS_FORMAT(lvds->format));
377 }
378 
px30_lvds_set_vop_source(struct rockchip_lvds * lvds,struct drm_encoder * encoder)379 static int px30_lvds_set_vop_source(struct rockchip_lvds *lvds,
380 				    struct drm_encoder *encoder)
381 {
382 	int vop;
383 
384 	vop = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
385 	if (vop < 0)
386 		return vop;
387 
388 	return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
389 				  PX30_LVDS_VOP_SEL(1),
390 				  PX30_LVDS_VOP_SEL(vop));
391 }
392 
px30_lvds_encoder_enable(struct drm_encoder * encoder)393 static void px30_lvds_encoder_enable(struct drm_encoder *encoder)
394 {
395 	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
396 	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
397 	int ret;
398 
399 	drm_panel_prepare(lvds->panel);
400 
401 	ret = px30_lvds_poweron(lvds);
402 	if (ret) {
403 		DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
404 		drm_panel_unprepare(lvds->panel);
405 		return;
406 	}
407 
408 	ret = px30_lvds_grf_config(encoder, mode);
409 	if (ret) {
410 		DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
411 		drm_panel_unprepare(lvds->panel);
412 		return;
413 	}
414 
415 	ret = px30_lvds_set_vop_source(lvds, encoder);
416 	if (ret) {
417 		DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
418 		drm_panel_unprepare(lvds->panel);
419 		return;
420 	}
421 
422 	drm_panel_enable(lvds->panel);
423 }
424 
px30_lvds_encoder_disable(struct drm_encoder * encoder)425 static void px30_lvds_encoder_disable(struct drm_encoder *encoder)
426 {
427 	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
428 
429 	drm_panel_disable(lvds->panel);
430 	px30_lvds_poweroff(lvds);
431 	drm_panel_unprepare(lvds->panel);
432 }
433 
434 static const
435 struct drm_encoder_helper_funcs rk3288_lvds_encoder_helper_funcs = {
436 	.enable = rk3288_lvds_encoder_enable,
437 	.disable = rk3288_lvds_encoder_disable,
438 	.atomic_check = rockchip_lvds_encoder_atomic_check,
439 };
440 
441 static const
442 struct drm_encoder_helper_funcs px30_lvds_encoder_helper_funcs = {
443 	.enable = px30_lvds_encoder_enable,
444 	.disable = px30_lvds_encoder_disable,
445 	.atomic_check = rockchip_lvds_encoder_atomic_check,
446 };
447 
rk3288_lvds_probe(struct platform_device * pdev,struct rockchip_lvds * lvds)448 static int rk3288_lvds_probe(struct platform_device *pdev,
449 			     struct rockchip_lvds *lvds)
450 {
451 	int ret;
452 
453 	lvds->regs = devm_platform_ioremap_resource(pdev, 0);
454 	if (IS_ERR(lvds->regs))
455 		return PTR_ERR(lvds->regs);
456 
457 	lvds->pclk = devm_clk_get(lvds->dev, "pclk_lvds");
458 	if (IS_ERR(lvds->pclk)) {
459 		DRM_DEV_ERROR(lvds->dev, "could not get pclk_lvds\n");
460 		return PTR_ERR(lvds->pclk);
461 	}
462 
463 	lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins),
464 				  GFP_KERNEL);
465 	if (!lvds->pins)
466 		return -ENOMEM;
467 
468 	lvds->pins->p = devm_pinctrl_get(lvds->dev);
469 	if (IS_ERR(lvds->pins->p)) {
470 		DRM_DEV_ERROR(lvds->dev, "no pinctrl handle\n");
471 		devm_kfree(lvds->dev, lvds->pins);
472 		lvds->pins = NULL;
473 	} else {
474 		lvds->pins->default_state =
475 			pinctrl_lookup_state(lvds->pins->p, "lcdc");
476 		if (IS_ERR(lvds->pins->default_state)) {
477 			DRM_DEV_ERROR(lvds->dev, "no default pinctrl state\n");
478 			devm_kfree(lvds->dev, lvds->pins);
479 			lvds->pins = NULL;
480 		}
481 	}
482 
483 	ret = clk_prepare(lvds->pclk);
484 	if (ret < 0) {
485 		DRM_DEV_ERROR(lvds->dev, "failed to prepare pclk_lvds\n");
486 		return ret;
487 	}
488 
489 	return 0;
490 }
491 
px30_lvds_probe(struct platform_device * pdev,struct rockchip_lvds * lvds)492 static int px30_lvds_probe(struct platform_device *pdev,
493 			   struct rockchip_lvds *lvds)
494 {
495 	int ret;
496 
497 	/* MSB */
498 	ret =  regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
499 				  PX30_LVDS_MSBSEL(1),
500 				  PX30_LVDS_MSBSEL(1));
501 	if (ret)
502 		return ret;
503 
504 	/* PHY */
505 	lvds->dphy = devm_phy_get(&pdev->dev, "dphy");
506 	if (IS_ERR(lvds->dphy))
507 		return PTR_ERR(lvds->dphy);
508 
509 	ret = phy_init(lvds->dphy);
510 	if (ret)
511 		return ret;
512 
513 	ret = phy_set_mode(lvds->dphy, PHY_MODE_LVDS);
514 	if (ret)
515 		return ret;
516 
517 	return phy_power_on(lvds->dphy);
518 }
519 
520 static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
521 	.probe = rk3288_lvds_probe,
522 	.helper_funcs = &rk3288_lvds_encoder_helper_funcs,
523 };
524 
525 static const struct rockchip_lvds_soc_data px30_lvds_data = {
526 	.probe = px30_lvds_probe,
527 	.helper_funcs = &px30_lvds_encoder_helper_funcs,
528 };
529 
530 static const struct of_device_id rockchip_lvds_dt_ids[] = {
531 	{
532 		.compatible = "rockchip,rk3288-lvds",
533 		.data = &rk3288_lvds_data
534 	},
535 	{
536 		.compatible = "rockchip,px30-lvds",
537 		.data = &px30_lvds_data
538 	},
539 	{}
540 };
541 MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
542 
rockchip_lvds_bind(struct device * dev,struct device * master,void * data)543 static int rockchip_lvds_bind(struct device *dev, struct device *master,
544 			      void *data)
545 {
546 	struct rockchip_lvds *lvds = dev_get_drvdata(dev);
547 	struct drm_device *drm_dev = data;
548 	struct drm_encoder *encoder;
549 	struct drm_connector *connector;
550 	struct device_node *remote = NULL;
551 	struct device_node  *port, *endpoint;
552 	int ret = 0, child_count = 0;
553 	const char *name;
554 	u32 endpoint_id = 0;
555 
556 	lvds->drm_dev = drm_dev;
557 	port = of_graph_get_port_by_id(dev->of_node, 1);
558 	if (!port) {
559 		DRM_DEV_ERROR(dev,
560 			      "can't found port point, please init lvds panel port!\n");
561 		return -EINVAL;
562 	}
563 	for_each_child_of_node(port, endpoint) {
564 		child_count++;
565 		of_property_read_u32(endpoint, "reg", &endpoint_id);
566 		ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
567 						  &lvds->panel, &lvds->bridge);
568 		if (!ret) {
569 			of_node_put(endpoint);
570 			break;
571 		}
572 	}
573 	if (!child_count) {
574 		DRM_DEV_ERROR(dev, "lvds port does not have any children\n");
575 		ret = -EINVAL;
576 		goto err_put_port;
577 	} else if (ret) {
578 		dev_err_probe(dev, ret, "failed to find panel and bridge node\n");
579 		goto err_put_port;
580 	}
581 	if (lvds->panel)
582 		remote = lvds->panel->dev->of_node;
583 	else
584 		remote = lvds->bridge->of_node;
585 	if (of_property_read_string(dev->of_node, "rockchip,output", &name))
586 		/* default set it as output rgb */
587 		lvds->output = DISPLAY_OUTPUT_RGB;
588 	else
589 		lvds->output = rockchip_lvds_name_to_output(name);
590 
591 	if (lvds->output < 0) {
592 		DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name);
593 		ret = lvds->output;
594 		goto err_put_remote;
595 	}
596 
597 	if (of_property_read_string(remote, "data-mapping", &name))
598 		/* default set it as format vesa 18 */
599 		lvds->format = LVDS_VESA_18;
600 	else
601 		lvds->format = rockchip_lvds_name_to_format(name);
602 
603 	if (lvds->format < 0) {
604 		DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name);
605 		ret = lvds->format;
606 		goto err_put_remote;
607 	}
608 
609 	encoder = &lvds->encoder.encoder;
610 	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
611 							     dev->of_node);
612 
613 	ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_LVDS);
614 	if (ret < 0) {
615 		DRM_DEV_ERROR(drm_dev->dev,
616 			      "failed to initialize encoder: %d\n", ret);
617 		goto err_put_remote;
618 	}
619 
620 	drm_encoder_helper_add(encoder, lvds->soc_data->helper_funcs);
621 	connector = &lvds->connector;
622 
623 	if (lvds->panel) {
624 		connector->dpms = DRM_MODE_DPMS_OFF;
625 		ret = drm_connector_init(drm_dev, connector,
626 					 &rockchip_lvds_connector_funcs,
627 					 DRM_MODE_CONNECTOR_LVDS);
628 		if (ret < 0) {
629 			DRM_DEV_ERROR(drm_dev->dev,
630 				      "failed to initialize connector: %d\n", ret);
631 			goto err_free_encoder;
632 		}
633 
634 		drm_connector_helper_add(connector,
635 					 &rockchip_lvds_connector_helper_funcs);
636 	} else {
637 		ret = drm_bridge_attach(encoder, lvds->bridge, NULL,
638 					DRM_BRIDGE_ATTACH_NO_CONNECTOR);
639 		if (ret)
640 			goto err_free_encoder;
641 
642 		connector = drm_bridge_connector_init(lvds->drm_dev, encoder);
643 		if (IS_ERR(connector)) {
644 			DRM_DEV_ERROR(drm_dev->dev,
645 				      "failed to initialize bridge connector: %pe\n",
646 				      connector);
647 			ret = PTR_ERR(connector);
648 			goto err_free_encoder;
649 		}
650 	}
651 
652 	ret = drm_connector_attach_encoder(connector, encoder);
653 	if (ret < 0) {
654 		DRM_DEV_ERROR(drm_dev->dev,
655 			      "failed to attach encoder: %d\n", ret);
656 		goto err_free_connector;
657 	}
658 
659 	pm_runtime_enable(dev);
660 	of_node_put(remote);
661 	of_node_put(port);
662 
663 	return 0;
664 
665 err_free_connector:
666 	drm_connector_cleanup(connector);
667 err_free_encoder:
668 	drm_encoder_cleanup(encoder);
669 err_put_remote:
670 	of_node_put(remote);
671 err_put_port:
672 	of_node_put(port);
673 
674 	return ret;
675 }
676 
rockchip_lvds_unbind(struct device * dev,struct device * master,void * data)677 static void rockchip_lvds_unbind(struct device *dev, struct device *master,
678 				void *data)
679 {
680 	struct rockchip_lvds *lvds = dev_get_drvdata(dev);
681 	const struct drm_encoder_helper_funcs *encoder_funcs;
682 
683 	encoder_funcs = lvds->soc_data->helper_funcs;
684 	encoder_funcs->disable(&lvds->encoder.encoder);
685 	pm_runtime_disable(dev);
686 	drm_connector_cleanup(&lvds->connector);
687 	drm_encoder_cleanup(&lvds->encoder.encoder);
688 }
689 
690 static const struct component_ops rockchip_lvds_component_ops = {
691 	.bind = rockchip_lvds_bind,
692 	.unbind = rockchip_lvds_unbind,
693 };
694 
rockchip_lvds_probe(struct platform_device * pdev)695 static int rockchip_lvds_probe(struct platform_device *pdev)
696 {
697 	struct device *dev = &pdev->dev;
698 	struct rockchip_lvds *lvds;
699 	const struct of_device_id *match;
700 	int ret;
701 
702 	if (!dev->of_node)
703 		return -ENODEV;
704 
705 	lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
706 	if (!lvds)
707 		return -ENOMEM;
708 
709 	lvds->dev = dev;
710 	match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
711 	if (!match)
712 		return -ENODEV;
713 	lvds->soc_data = match->data;
714 
715 	lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
716 						    "rockchip,grf");
717 	if (IS_ERR(lvds->grf)) {
718 		DRM_DEV_ERROR(dev, "missing rockchip,grf property\n");
719 		return PTR_ERR(lvds->grf);
720 	}
721 
722 	ret = lvds->soc_data->probe(pdev, lvds);
723 	if (ret) {
724 		DRM_DEV_ERROR(dev, "Platform initialization failed\n");
725 		return ret;
726 	}
727 
728 	dev_set_drvdata(dev, lvds);
729 
730 	ret = component_add(&pdev->dev, &rockchip_lvds_component_ops);
731 	if (ret < 0) {
732 		DRM_DEV_ERROR(dev, "failed to add component\n");
733 		clk_unprepare(lvds->pclk);
734 	}
735 
736 	return ret;
737 }
738 
rockchip_lvds_remove(struct platform_device * pdev)739 static void rockchip_lvds_remove(struct platform_device *pdev)
740 {
741 	struct rockchip_lvds *lvds = platform_get_drvdata(pdev);
742 
743 	component_del(&pdev->dev, &rockchip_lvds_component_ops);
744 	clk_unprepare(lvds->pclk);
745 }
746 
747 struct platform_driver rockchip_lvds_driver = {
748 	.probe = rockchip_lvds_probe,
749 	.remove_new = rockchip_lvds_remove,
750 	.driver = {
751 		   .name = "rockchip-lvds",
752 		   .of_match_table = rockchip_lvds_dt_ids,
753 	},
754 };
755