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