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/display/drm_dp_helper.h>
21 #include <drm/drm_atomic_helper.h>
22 #include <drm/drm_bridge.h>
23 #include <drm/drm_bridge_connector.h>
24 #include <drm/drm_of.h>
25 #include <drm/drm_panel.h>
26 #include <drm/drm_probe_helper.h>
27 #include <drm/drm_simple_kms_helper.h>
28
29 #include "rockchip_drm_drv.h"
30 #include "rockchip_drm_vop.h"
31 #include "rockchip_lvds.h"
32
33 #define DISPLAY_OUTPUT_RGB 0
34 #define DISPLAY_OUTPUT_LVDS 1
35 #define DISPLAY_OUTPUT_DUAL_LVDS 2
36
37 struct rockchip_lvds;
38
39 /**
40 * struct rockchip_lvds_soc_data - rockchip lvds Soc private data
41 * @probe: LVDS platform probe function
42 * @helper_funcs: LVDS connector helper functions
43 */
44 struct rockchip_lvds_soc_data {
45 int (*probe)(struct platform_device *pdev, struct rockchip_lvds *lvds);
46 const struct drm_encoder_helper_funcs *helper_funcs;
47 };
48
49 struct rockchip_lvds {
50 struct device *dev;
51 void __iomem *regs;
52 struct regmap *grf;
53 struct clk *pclk;
54 struct phy *dphy;
55 const struct rockchip_lvds_soc_data *soc_data;
56 int output; /* rgb lvds or dual lvds output */
57 int format; /* vesa or jeida format */
58 struct drm_device *drm_dev;
59 struct drm_panel *panel;
60 struct drm_bridge *bridge;
61 struct drm_connector connector;
62 struct rockchip_encoder encoder;
63 struct dev_pin_info *pins;
64 };
65
connector_to_lvds(struct drm_connector * connector)66 static inline struct rockchip_lvds *connector_to_lvds(struct drm_connector *connector)
67 {
68 return container_of(connector, struct rockchip_lvds, connector);
69 }
70
encoder_to_lvds(struct drm_encoder * encoder)71 static inline struct rockchip_lvds *encoder_to_lvds(struct drm_encoder *encoder)
72 {
73 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
74
75 return container_of(rkencoder, struct rockchip_lvds, encoder);
76 }
77
rk3288_writel(struct rockchip_lvds * lvds,u32 offset,u32 val)78 static inline void rk3288_writel(struct rockchip_lvds *lvds, u32 offset,
79 u32 val)
80 {
81 writel_relaxed(val, lvds->regs + offset);
82 if (lvds->output == DISPLAY_OUTPUT_LVDS)
83 return;
84 writel_relaxed(val, lvds->regs + offset + RK3288_LVDS_CH1_OFFSET);
85 }
86
rockchip_lvds_name_to_format(const char * s)87 static inline int rockchip_lvds_name_to_format(const char *s)
88 {
89 if (strncmp(s, "jeida-18", 8) == 0)
90 return LVDS_JEIDA_18;
91 else if (strncmp(s, "jeida-24", 8) == 0)
92 return LVDS_JEIDA_24;
93 else if (strncmp(s, "vesa-24", 7) == 0)
94 return LVDS_VESA_24;
95
96 return -EINVAL;
97 }
98
rockchip_lvds_name_to_output(const char * s)99 static inline int rockchip_lvds_name_to_output(const char *s)
100 {
101 if (strncmp(s, "rgb", 3) == 0)
102 return DISPLAY_OUTPUT_RGB;
103 else if (strncmp(s, "lvds", 4) == 0)
104 return DISPLAY_OUTPUT_LVDS;
105 else if (strncmp(s, "duallvds", 8) == 0)
106 return DISPLAY_OUTPUT_DUAL_LVDS;
107
108 return -EINVAL;
109 }
110
111 static const struct drm_connector_funcs rockchip_lvds_connector_funcs = {
112 .fill_modes = drm_helper_probe_single_connector_modes,
113 .destroy = drm_connector_cleanup,
114 .reset = drm_atomic_helper_connector_reset,
115 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
116 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
117 };
118
rockchip_lvds_connector_get_modes(struct drm_connector * connector)119 static int rockchip_lvds_connector_get_modes(struct drm_connector *connector)
120 {
121 struct rockchip_lvds *lvds = connector_to_lvds(connector);
122 struct drm_panel *panel = lvds->panel;
123
124 return drm_panel_get_modes(panel, connector);
125 }
126
127 static const
128 struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
129 .get_modes = rockchip_lvds_connector_get_modes,
130 };
131
132 static int
rockchip_lvds_encoder_atomic_check(struct drm_encoder * encoder,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state)133 rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder,
134 struct drm_crtc_state *crtc_state,
135 struct drm_connector_state *conn_state)
136 {
137 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
138
139 s->output_mode = ROCKCHIP_OUT_MODE_P888;
140 s->output_type = DRM_MODE_CONNECTOR_LVDS;
141
142 return 0;
143 }
144
rk3288_lvds_poweron(struct rockchip_lvds * lvds)145 static int rk3288_lvds_poweron(struct rockchip_lvds *lvds)
146 {
147 int ret;
148 u32 val;
149
150 ret = clk_enable(lvds->pclk);
151 if (ret < 0) {
152 DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret);
153 return ret;
154 }
155 ret = pm_runtime_get_sync(lvds->dev);
156 if (ret < 0) {
157 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
158 clk_disable(lvds->pclk);
159 return ret;
160 }
161 val = RK3288_LVDS_CH0_REG0_LANE4_EN | RK3288_LVDS_CH0_REG0_LANE3_EN |
162 RK3288_LVDS_CH0_REG0_LANE2_EN | RK3288_LVDS_CH0_REG0_LANE1_EN |
163 RK3288_LVDS_CH0_REG0_LANE0_EN;
164 if (lvds->output == DISPLAY_OUTPUT_RGB) {
165 val |= RK3288_LVDS_CH0_REG0_TTL_EN |
166 RK3288_LVDS_CH0_REG0_LANECK_EN;
167 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
168 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
169 RK3288_LVDS_PLL_FBDIV_REG2(0x46));
170 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4,
171 RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
172 RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
173 RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
174 RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
175 RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
176 RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
177 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5,
178 RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
179 RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
180 RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
181 RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
182 RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
183 RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
184 } else {
185 val |= RK3288_LVDS_CH0_REG0_LVDS_EN |
186 RK3288_LVDS_CH0_REG0_LANECK_EN;
187 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
188 rk3288_writel(lvds, RK3288_LVDS_CH0_REG1,
189 RK3288_LVDS_CH0_REG1_LANECK_BIAS |
190 RK3288_LVDS_CH0_REG1_LANE4_BIAS |
191 RK3288_LVDS_CH0_REG1_LANE3_BIAS |
192 RK3288_LVDS_CH0_REG1_LANE2_BIAS |
193 RK3288_LVDS_CH0_REG1_LANE1_BIAS |
194 RK3288_LVDS_CH0_REG1_LANE0_BIAS);
195 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
196 RK3288_LVDS_CH0_REG2_RESERVE_ON |
197 RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
198 RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
199 RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
200 RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
201 RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
202 RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
203 RK3288_LVDS_PLL_FBDIV_REG2(0x46));
204 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00);
205 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00);
206 }
207 rk3288_writel(lvds, RK3288_LVDS_CH0_REG3,
208 RK3288_LVDS_PLL_FBDIV_REG3(0x46));
209 rk3288_writel(lvds, RK3288_LVDS_CH0_REGD,
210 RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
211 rk3288_writel(lvds, RK3288_LVDS_CH0_REG20,
212 RK3288_LVDS_CH0_REG20_LSB);
213
214 rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
215 RK3288_LVDS_CFG_REGC_PLL_ENABLE);
216 rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
217 RK3288_LVDS_CFG_REG21_TX_ENABLE);
218
219 return 0;
220 }
221
rk3288_lvds_poweroff(struct rockchip_lvds * lvds)222 static void rk3288_lvds_poweroff(struct rockchip_lvds *lvds)
223 {
224 int ret;
225 u32 val;
226
227 rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
228 RK3288_LVDS_CFG_REG21_TX_ENABLE);
229 rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
230 RK3288_LVDS_CFG_REGC_PLL_ENABLE);
231 val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN;
232 val |= val << 16;
233 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
234 if (ret != 0)
235 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
236
237 pm_runtime_put(lvds->dev);
238 clk_disable(lvds->pclk);
239 }
240
rk3288_lvds_grf_config(struct drm_encoder * encoder,struct drm_display_mode * mode)241 static int rk3288_lvds_grf_config(struct drm_encoder *encoder,
242 struct drm_display_mode *mode)
243 {
244 struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
245 u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0;
246 u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0;
247 u32 val;
248 int ret;
249
250 /* iomux to LCD data/sync mode */
251 if (lvds->output == DISPLAY_OUTPUT_RGB)
252 if (lvds->pins && !IS_ERR(lvds->pins->default_state))
253 pinctrl_select_state(lvds->pins->p,
254 lvds->pins->default_state);
255 val = lvds->format | LVDS_CH0_EN;
256 if (lvds->output == DISPLAY_OUTPUT_RGB)
257 val |= LVDS_TTL_EN | LVDS_CH1_EN;
258 else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS)
259 val |= LVDS_DUAL | LVDS_CH1_EN;
260
261 if ((mode->htotal - mode->hsync_start) & 0x01)
262 val |= LVDS_START_PHASE_RST_1;
263
264 val |= (pin_dclk << 8) | (pin_hsync << 9);
265 val |= (0xffff << 16);
266 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
267 if (ret)
268 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
269
270 return ret;
271 }
272
rk3288_lvds_set_vop_source(struct rockchip_lvds * lvds,struct drm_encoder * encoder)273 static int rk3288_lvds_set_vop_source(struct rockchip_lvds *lvds,
274 struct drm_encoder *encoder)
275 {
276 u32 val;
277 int ret;
278
279 ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
280 if (ret < 0)
281 return ret;
282
283 val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
284 if (ret)
285 val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT;
286
287 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON6, val);
288 if (ret < 0)
289 return ret;
290
291 return 0;
292 }
293
rk3288_lvds_encoder_enable(struct drm_encoder * encoder)294 static void rk3288_lvds_encoder_enable(struct drm_encoder *encoder)
295 {
296 struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
297 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
298 int ret;
299
300 drm_panel_prepare(lvds->panel);
301
302 ret = rk3288_lvds_poweron(lvds);
303 if (ret < 0) {
304 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
305 drm_panel_unprepare(lvds->panel);
306 return;
307 }
308
309 ret = rk3288_lvds_grf_config(encoder, mode);
310 if (ret) {
311 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
312 drm_panel_unprepare(lvds->panel);
313 return;
314 }
315
316 ret = rk3288_lvds_set_vop_source(lvds, encoder);
317 if (ret) {
318 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
319 drm_panel_unprepare(lvds->panel);
320 return;
321 }
322
323 drm_panel_enable(lvds->panel);
324 }
325
rk3288_lvds_encoder_disable(struct drm_encoder * encoder)326 static void rk3288_lvds_encoder_disable(struct drm_encoder *encoder)
327 {
328 struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
329
330 drm_panel_disable(lvds->panel);
331 rk3288_lvds_poweroff(lvds);
332 drm_panel_unprepare(lvds->panel);
333 }
334
px30_lvds_poweron(struct rockchip_lvds * lvds)335 static int px30_lvds_poweron(struct rockchip_lvds *lvds)
336 {
337 int ret;
338
339 ret = pm_runtime_get_sync(lvds->dev);
340 if (ret < 0) {
341 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
342 return ret;
343 }
344
345 /* Enable LVDS mode */
346 return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
347 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
348 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1));
349 }
350
px30_lvds_poweroff(struct rockchip_lvds * lvds)351 static void px30_lvds_poweroff(struct rockchip_lvds *lvds)
352 {
353 regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
354 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
355 PX30_LVDS_MODE_EN(0) | PX30_LVDS_P2S_EN(0));
356
357 pm_runtime_put(lvds->dev);
358 }
359
px30_lvds_grf_config(struct drm_encoder * encoder,struct drm_display_mode * mode)360 static int px30_lvds_grf_config(struct drm_encoder *encoder,
361 struct drm_display_mode *mode)
362 {
363 struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
364
365 if (lvds->output != DISPLAY_OUTPUT_LVDS) {
366 DRM_DEV_ERROR(lvds->dev, "Unsupported display output %d\n",
367 lvds->output);
368 return -EINVAL;
369 }
370
371 /* Set format */
372 return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
373 PX30_LVDS_FORMAT(lvds->format),
374 PX30_LVDS_FORMAT(lvds->format));
375 }
376
px30_lvds_set_vop_source(struct rockchip_lvds * lvds,struct drm_encoder * encoder)377 static int px30_lvds_set_vop_source(struct rockchip_lvds *lvds,
378 struct drm_encoder *encoder)
379 {
380 int vop;
381
382 vop = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
383 if (vop < 0)
384 return vop;
385
386 return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
387 PX30_LVDS_VOP_SEL(1),
388 PX30_LVDS_VOP_SEL(vop));
389 }
390
px30_lvds_encoder_enable(struct drm_encoder * encoder)391 static void px30_lvds_encoder_enable(struct drm_encoder *encoder)
392 {
393 struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
394 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
395 int ret;
396
397 drm_panel_prepare(lvds->panel);
398
399 ret = px30_lvds_poweron(lvds);
400 if (ret) {
401 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
402 drm_panel_unprepare(lvds->panel);
403 return;
404 }
405
406 ret = px30_lvds_grf_config(encoder, mode);
407 if (ret) {
408 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
409 drm_panel_unprepare(lvds->panel);
410 return;
411 }
412
413 ret = px30_lvds_set_vop_source(lvds, encoder);
414 if (ret) {
415 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
416 drm_panel_unprepare(lvds->panel);
417 return;
418 }
419
420 drm_panel_enable(lvds->panel);
421 }
422
px30_lvds_encoder_disable(struct drm_encoder * encoder)423 static void px30_lvds_encoder_disable(struct drm_encoder *encoder)
424 {
425 struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
426
427 drm_panel_disable(lvds->panel);
428 px30_lvds_poweroff(lvds);
429 drm_panel_unprepare(lvds->panel);
430 }
431
432 static const
433 struct drm_encoder_helper_funcs rk3288_lvds_encoder_helper_funcs = {
434 .enable = rk3288_lvds_encoder_enable,
435 .disable = rk3288_lvds_encoder_disable,
436 .atomic_check = rockchip_lvds_encoder_atomic_check,
437 };
438
439 static const
440 struct drm_encoder_helper_funcs px30_lvds_encoder_helper_funcs = {
441 .enable = px30_lvds_encoder_enable,
442 .disable = px30_lvds_encoder_disable,
443 .atomic_check = rockchip_lvds_encoder_atomic_check,
444 };
445
rk3288_lvds_probe(struct platform_device * pdev,struct rockchip_lvds * lvds)446 static int rk3288_lvds_probe(struct platform_device *pdev,
447 struct rockchip_lvds *lvds)
448 {
449 int ret;
450
451 lvds->regs = devm_platform_ioremap_resource(pdev, 0);
452 if (IS_ERR(lvds->regs))
453 return PTR_ERR(lvds->regs);
454
455 lvds->pclk = devm_clk_get(lvds->dev, "pclk_lvds");
456 if (IS_ERR(lvds->pclk)) {
457 DRM_DEV_ERROR(lvds->dev, "could not get pclk_lvds\n");
458 return PTR_ERR(lvds->pclk);
459 }
460
461 lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins),
462 GFP_KERNEL);
463 if (!lvds->pins)
464 return -ENOMEM;
465
466 lvds->pins->p = devm_pinctrl_get(lvds->dev);
467 if (IS_ERR(lvds->pins->p)) {
468 DRM_DEV_ERROR(lvds->dev, "no pinctrl handle\n");
469 devm_kfree(lvds->dev, lvds->pins);
470 lvds->pins = NULL;
471 } else {
472 lvds->pins->default_state =
473 pinctrl_lookup_state(lvds->pins->p, "lcdc");
474 if (IS_ERR(lvds->pins->default_state)) {
475 DRM_DEV_ERROR(lvds->dev, "no default pinctrl state\n");
476 devm_kfree(lvds->dev, lvds->pins);
477 lvds->pins = NULL;
478 }
479 }
480
481 ret = clk_prepare(lvds->pclk);
482 if (ret < 0) {
483 DRM_DEV_ERROR(lvds->dev, "failed to prepare pclk_lvds\n");
484 return ret;
485 }
486
487 return 0;
488 }
489
px30_lvds_probe(struct platform_device * pdev,struct rockchip_lvds * lvds)490 static int px30_lvds_probe(struct platform_device *pdev,
491 struct rockchip_lvds *lvds)
492 {
493 int ret;
494
495 /* MSB */
496 ret = regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
497 PX30_LVDS_MSBSEL(1),
498 PX30_LVDS_MSBSEL(1));
499 if (ret)
500 return ret;
501
502 /* PHY */
503 lvds->dphy = devm_phy_get(&pdev->dev, "dphy");
504 if (IS_ERR(lvds->dphy))
505 return PTR_ERR(lvds->dphy);
506
507 ret = phy_init(lvds->dphy);
508 if (ret)
509 return ret;
510
511 ret = phy_set_mode(lvds->dphy, PHY_MODE_LVDS);
512 if (ret)
513 return ret;
514
515 return phy_power_on(lvds->dphy);
516 }
517
518 static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
519 .probe = rk3288_lvds_probe,
520 .helper_funcs = &rk3288_lvds_encoder_helper_funcs,
521 };
522
523 static const struct rockchip_lvds_soc_data px30_lvds_data = {
524 .probe = px30_lvds_probe,
525 .helper_funcs = &px30_lvds_encoder_helper_funcs,
526 };
527
528 static const struct of_device_id rockchip_lvds_dt_ids[] = {
529 {
530 .compatible = "rockchip,rk3288-lvds",
531 .data = &rk3288_lvds_data
532 },
533 {
534 .compatible = "rockchip,px30-lvds",
535 .data = &px30_lvds_data
536 },
537 {}
538 };
539 MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
540
rockchip_lvds_bind(struct device * dev,struct device * master,void * data)541 static int rockchip_lvds_bind(struct device *dev, struct device *master,
542 void *data)
543 {
544 struct rockchip_lvds *lvds = dev_get_drvdata(dev);
545 struct drm_device *drm_dev = data;
546 struct drm_encoder *encoder;
547 struct drm_connector *connector;
548 struct device_node *remote = NULL;
549 struct device_node *port, *endpoint;
550 int ret = 0, child_count = 0;
551 const char *name;
552 u32 endpoint_id = 0;
553
554 lvds->drm_dev = drm_dev;
555 port = of_graph_get_port_by_id(dev->of_node, 1);
556 if (!port) {
557 DRM_DEV_ERROR(dev,
558 "can't found port point, please init lvds panel port!\n");
559 return -EINVAL;
560 }
561 for_each_child_of_node(port, endpoint) {
562 child_count++;
563 of_property_read_u32(endpoint, "reg", &endpoint_id);
564 ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
565 &lvds->panel, &lvds->bridge);
566 if (!ret) {
567 of_node_put(endpoint);
568 break;
569 }
570 }
571 if (!child_count) {
572 DRM_DEV_ERROR(dev, "lvds port does not have any children\n");
573 ret = -EINVAL;
574 goto err_put_port;
575 } else if (ret) {
576 DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n");
577 ret = -EPROBE_DEFER;
578 goto err_put_port;
579 }
580 if (lvds->panel)
581 remote = lvds->panel->dev->of_node;
582 else
583 remote = lvds->bridge->of_node;
584 if (of_property_read_string(dev->of_node, "rockchip,output", &name))
585 /* default set it as output rgb */
586 lvds->output = DISPLAY_OUTPUT_RGB;
587 else
588 lvds->output = rockchip_lvds_name_to_output(name);
589
590 if (lvds->output < 0) {
591 DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name);
592 ret = lvds->output;
593 goto err_put_remote;
594 }
595
596 if (of_property_read_string(remote, "data-mapping", &name))
597 /* default set it as format vesa 18 */
598 lvds->format = LVDS_VESA_18;
599 else
600 lvds->format = rockchip_lvds_name_to_format(name);
601
602 if (lvds->format < 0) {
603 DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name);
604 ret = lvds->format;
605 goto err_put_remote;
606 }
607
608 encoder = &lvds->encoder.encoder;
609 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
610 dev->of_node);
611
612 ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_LVDS);
613 if (ret < 0) {
614 DRM_DEV_ERROR(drm_dev->dev,
615 "failed to initialize encoder: %d\n", ret);
616 goto err_put_remote;
617 }
618
619 drm_encoder_helper_add(encoder, lvds->soc_data->helper_funcs);
620 connector = &lvds->connector;
621
622 if (lvds->panel) {
623 connector->dpms = DRM_MODE_DPMS_OFF;
624 ret = drm_connector_init(drm_dev, connector,
625 &rockchip_lvds_connector_funcs,
626 DRM_MODE_CONNECTOR_LVDS);
627 if (ret < 0) {
628 DRM_DEV_ERROR(drm_dev->dev,
629 "failed to initialize connector: %d\n", ret);
630 goto err_free_encoder;
631 }
632
633 drm_connector_helper_add(connector,
634 &rockchip_lvds_connector_helper_funcs);
635 } else {
636 ret = drm_bridge_attach(encoder, lvds->bridge, NULL,
637 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
638 if (ret)
639 goto err_free_encoder;
640
641 connector = drm_bridge_connector_init(lvds->drm_dev, encoder);
642 if (IS_ERR(connector)) {
643 DRM_DEV_ERROR(drm_dev->dev,
644 "failed to initialize bridge connector: %pe\n",
645 connector);
646 ret = PTR_ERR(connector);
647 goto err_free_encoder;
648 }
649 }
650
651 ret = drm_connector_attach_encoder(connector, encoder);
652 if (ret < 0) {
653 DRM_DEV_ERROR(drm_dev->dev,
654 "failed to attach encoder: %d\n", ret);
655 goto err_free_connector;
656 }
657
658 pm_runtime_enable(dev);
659 of_node_put(remote);
660 of_node_put(port);
661
662 return 0;
663
664 err_free_connector:
665 drm_connector_cleanup(connector);
666 err_free_encoder:
667 drm_encoder_cleanup(encoder);
668 err_put_remote:
669 of_node_put(remote);
670 err_put_port:
671 of_node_put(port);
672
673 return ret;
674 }
675
rockchip_lvds_unbind(struct device * dev,struct device * master,void * data)676 static void rockchip_lvds_unbind(struct device *dev, struct device *master,
677 void *data)
678 {
679 struct rockchip_lvds *lvds = dev_get_drvdata(dev);
680 const struct drm_encoder_helper_funcs *encoder_funcs;
681
682 encoder_funcs = lvds->soc_data->helper_funcs;
683 encoder_funcs->disable(&lvds->encoder.encoder);
684 pm_runtime_disable(dev);
685 drm_connector_cleanup(&lvds->connector);
686 drm_encoder_cleanup(&lvds->encoder.encoder);
687 }
688
689 static const struct component_ops rockchip_lvds_component_ops = {
690 .bind = rockchip_lvds_bind,
691 .unbind = rockchip_lvds_unbind,
692 };
693
rockchip_lvds_probe(struct platform_device * pdev)694 static int rockchip_lvds_probe(struct platform_device *pdev)
695 {
696 struct device *dev = &pdev->dev;
697 struct rockchip_lvds *lvds;
698 const struct of_device_id *match;
699 int ret;
700
701 if (!dev->of_node)
702 return -ENODEV;
703
704 lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
705 if (!lvds)
706 return -ENOMEM;
707
708 lvds->dev = dev;
709 match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
710 if (!match)
711 return -ENODEV;
712 lvds->soc_data = match->data;
713
714 lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
715 "rockchip,grf");
716 if (IS_ERR(lvds->grf)) {
717 DRM_DEV_ERROR(dev, "missing rockchip,grf property\n");
718 return PTR_ERR(lvds->grf);
719 }
720
721 ret = lvds->soc_data->probe(pdev, lvds);
722 if (ret) {
723 DRM_DEV_ERROR(dev, "Platform initialization failed\n");
724 return ret;
725 }
726
727 dev_set_drvdata(dev, lvds);
728
729 ret = component_add(&pdev->dev, &rockchip_lvds_component_ops);
730 if (ret < 0) {
731 DRM_DEV_ERROR(dev, "failed to add component\n");
732 clk_unprepare(lvds->pclk);
733 }
734
735 return ret;
736 }
737
rockchip_lvds_remove(struct platform_device * pdev)738 static int rockchip_lvds_remove(struct platform_device *pdev)
739 {
740 struct rockchip_lvds *lvds = platform_get_drvdata(pdev);
741
742 component_del(&pdev->dev, &rockchip_lvds_component_ops);
743 clk_unprepare(lvds->pclk);
744
745 return 0;
746 }
747
748 struct platform_driver rockchip_lvds_driver = {
749 .probe = rockchip_lvds_probe,
750 .remove = rockchip_lvds_remove,
751 .driver = {
752 .name = "rockchip-lvds",
753 .of_match_table = of_match_ptr(rockchip_lvds_dt_ids),
754 },
755 };
756
