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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
35struct 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 */
42struct 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
47struct 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
64static inline struct rockchip_lvds *connector_to_lvds(struct drm_connector *connector)
65{
66 return container_of(connector, struct rockchip_lvds, connector);
67}
68
69static 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
76static 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
85static 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
97static 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
109static 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
117static 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
125static const
126struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
127 .get_modes = rockchip_lvds_connector_get_modes,
128};
129
130static int
131rockchip_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
143static 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
220static 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
239static 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
271static 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
292static 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
324static 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
333static 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
353static 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
362static 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
379static 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
393static 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
425static 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
434static const
435struct 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
441static const
442struct 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
448static 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
492static 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
520static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
521 .probe = rk3288_lvds_probe,
522 .helper_funcs = &rk3288_lvds_encoder_helper_funcs,
523};
524
525static const struct rockchip_lvds_soc_data px30_lvds_data = {
526 .probe = px30_lvds_probe,
527 .helper_funcs = &px30_lvds_encoder_helper_funcs,
528};
529
530static 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};
541MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
542
543static 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
665err_free_connector:
666 drm_connector_cleanup(connector);
667err_free_encoder:
668 drm_encoder_cleanup(encoder);
669err_put_remote:
670 of_node_put(remote);
671err_put_port:
672 of_node_put(port);
673
674 return ret;
675}
676
677static 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
690static const struct component_ops rockchip_lvds_component_ops = {
691 .bind = rockchip_lvds_bind,
692 .unbind = rockchip_lvds_unbind,
693};
694
695static 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
739static 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
747struct 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};
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
36struct 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 */
49struct 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
54struct 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
71static 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
80static 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
92static 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
104static 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
112static 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
120static const
121struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
122 .get_modes = rockchip_lvds_connector_get_modes,
123};
124
125static int
126rockchip_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
138static 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
215static 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
234static 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
266static 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
287static 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
319static 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
328static 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
344static 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
353static 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
370static 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
384static 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
416static 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
425static const
426struct 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
432static const
433struct 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
439static 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
485static 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
513static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
514 .probe = rk3288_lvds_probe,
515 .helper_funcs = &rk3288_lvds_encoder_helper_funcs,
516};
517
518static const struct rockchip_lvds_soc_data px30_lvds_data = {
519 .probe = px30_lvds_probe,
520 .helper_funcs = &px30_lvds_encoder_helper_funcs,
521};
522
523static 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};
534MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
535
536static 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;
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
638 ret = drm_panel_attach(lvds->panel, connector);
639 if (ret < 0) {
640 DRM_DEV_ERROR(drm_dev->dev,
641 "failed to attach panel: %d\n", ret);
642 goto err_free_connector;
643 }
644 } else {
645 ret = drm_bridge_attach(encoder, lvds->bridge, NULL, 0);
646 if (ret) {
647 DRM_DEV_ERROR(drm_dev->dev,
648 "failed to attach bridge: %d\n", ret);
649 goto err_free_encoder;
650 }
651 }
652
653 pm_runtime_enable(dev);
654 of_node_put(remote);
655 of_node_put(port);
656
657 return 0;
658
659err_free_connector:
660 drm_connector_cleanup(connector);
661err_free_encoder:
662 drm_encoder_cleanup(encoder);
663err_put_remote:
664 of_node_put(remote);
665err_put_port:
666 of_node_put(port);
667
668 return ret;
669}
670
671static void rockchip_lvds_unbind(struct device *dev, struct device *master,
672 void *data)
673{
674 struct rockchip_lvds *lvds = dev_get_drvdata(dev);
675 const struct drm_encoder_helper_funcs *encoder_funcs;
676
677 encoder_funcs = lvds->soc_data->helper_funcs;
678 encoder_funcs->disable(&lvds->encoder);
679 if (lvds->panel)
680 drm_panel_detach(lvds->panel);
681 pm_runtime_disable(dev);
682 drm_connector_cleanup(&lvds->connector);
683 drm_encoder_cleanup(&lvds->encoder);
684}
685
686static const struct component_ops rockchip_lvds_component_ops = {
687 .bind = rockchip_lvds_bind,
688 .unbind = rockchip_lvds_unbind,
689};
690
691static int rockchip_lvds_probe(struct platform_device *pdev)
692{
693 struct device *dev = &pdev->dev;
694 struct rockchip_lvds *lvds;
695 const struct of_device_id *match;
696 int ret;
697
698 if (!dev->of_node)
699 return -ENODEV;
700
701 lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
702 if (!lvds)
703 return -ENOMEM;
704
705 lvds->dev = dev;
706 match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
707 if (!match)
708 return -ENODEV;
709 lvds->soc_data = match->data;
710
711 lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
712 "rockchip,grf");
713 if (IS_ERR(lvds->grf)) {
714 DRM_DEV_ERROR(dev, "missing rockchip,grf property\n");
715 return PTR_ERR(lvds->grf);
716 }
717
718 ret = lvds->soc_data->probe(pdev, lvds);
719 if (ret) {
720 DRM_DEV_ERROR(dev, "Platform initialization failed\n");
721 return ret;
722 }
723
724 dev_set_drvdata(dev, lvds);
725
726 ret = component_add(&pdev->dev, &rockchip_lvds_component_ops);
727 if (ret < 0) {
728 DRM_DEV_ERROR(dev, "failed to add component\n");
729 clk_unprepare(lvds->pclk);
730 }
731
732 return ret;
733}
734
735static int rockchip_lvds_remove(struct platform_device *pdev)
736{
737 struct rockchip_lvds *lvds = dev_get_drvdata(&pdev->dev);
738
739 component_del(&pdev->dev, &rockchip_lvds_component_ops);
740 clk_unprepare(lvds->pclk);
741
742 return 0;
743}
744
745struct platform_driver rockchip_lvds_driver = {
746 .probe = rockchip_lvds_probe,
747 .remove = rockchip_lvds_remove,
748 .driver = {
749 .name = "rockchip-lvds",
750 .of_match_table = of_match_ptr(rockchip_lvds_dt_ids),
751 },
752};