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 = rockchip_lvds_remove,
750 .driver = {
751 .name = "rockchip-lvds",
752 .of_match_table = rockchip_lvds_dt_ids,
753 },
754 };
755