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9e32e16e YY |
1 | /* |
2 | * Rockchip SoC DP (Display Port) interface driver. | |
3 | * | |
4 | * Copyright (C) Fuzhou Rockchip Electronics Co., Ltd. | |
5 | * Author: Andy Yan <andy.yan@rock-chips.com> | |
6 | * Yakir Yang <ykk@rock-chips.com> | |
7 | * Jeff Chen <jeff.chen@rock-chips.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | */ | |
14 | ||
15 | #include <linux/component.h> | |
16 | #include <linux/mfd/syscon.h> | |
17 | #include <linux/of_graph.h> | |
18 | #include <linux/regmap.h> | |
19 | #include <linux/reset.h> | |
20 | #include <linux/clk.h> | |
21 | ||
22 | #include <drm/drmP.h> | |
23 | #include <drm/drm_crtc_helper.h> | |
24 | #include <drm/drm_dp_helper.h> | |
25 | #include <drm/drm_of.h> | |
26 | #include <drm/drm_panel.h> | |
27 | ||
28 | #include <video/of_videomode.h> | |
29 | #include <video/videomode.h> | |
30 | ||
31 | #include <drm/bridge/analogix_dp.h> | |
32 | ||
33 | #include "rockchip_drm_drv.h" | |
34 | #include "rockchip_drm_vop.h" | |
35 | ||
36 | #define to_dp(nm) container_of(nm, struct rockchip_dp_device, nm) | |
37 | ||
38 | /* dp grf register offset */ | |
39 | #define GRF_SOC_CON6 0x025c | |
40 | #define GRF_EDP_LCD_SEL_MASK BIT(5) | |
41 | #define GRF_EDP_SEL_VOP_LIT BIT(5) | |
42 | #define GRF_EDP_SEL_VOP_BIG 0 | |
43 | ||
44 | struct rockchip_dp_device { | |
45 | struct drm_device *drm_dev; | |
46 | struct device *dev; | |
47 | struct drm_encoder encoder; | |
48 | struct drm_display_mode mode; | |
49 | ||
50 | struct clk *pclk; | |
51 | struct regmap *grf; | |
52 | struct reset_control *rst; | |
53 | ||
54 | struct analogix_dp_plat_data plat_data; | |
55 | }; | |
56 | ||
57 | static int rockchip_dp_pre_init(struct rockchip_dp_device *dp) | |
58 | { | |
59 | reset_control_assert(dp->rst); | |
60 | usleep_range(10, 20); | |
61 | reset_control_deassert(dp->rst); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data) | |
67 | { | |
68 | struct rockchip_dp_device *dp = to_dp(plat_data); | |
69 | int ret; | |
70 | ||
71 | ret = clk_prepare_enable(dp->pclk); | |
72 | if (ret < 0) { | |
73 | dev_err(dp->dev, "failed to enable pclk %d\n", ret); | |
74 | return ret; | |
75 | } | |
76 | ||
77 | ret = rockchip_dp_pre_init(dp); | |
78 | if (ret < 0) { | |
79 | dev_err(dp->dev, "failed to dp pre init %d\n", ret); | |
80 | return ret; | |
81 | } | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data) | |
87 | { | |
88 | struct rockchip_dp_device *dp = to_dp(plat_data); | |
89 | ||
90 | clk_disable_unprepare(dp->pclk); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | static bool | |
96 | rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder, | |
97 | const struct drm_display_mode *mode, | |
98 | struct drm_display_mode *adjusted_mode) | |
99 | { | |
100 | /* do nothing */ | |
101 | return true; | |
102 | } | |
103 | ||
104 | static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder, | |
105 | struct drm_display_mode *mode, | |
106 | struct drm_display_mode *adjusted) | |
107 | { | |
108 | /* do nothing */ | |
109 | } | |
110 | ||
111 | static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder) | |
112 | { | |
113 | struct rockchip_dp_device *dp = to_dp(encoder); | |
114 | int ret; | |
115 | u32 val; | |
116 | ||
9e32e16e YY |
117 | ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder); |
118 | if (ret < 0) | |
119 | return; | |
120 | ||
121 | if (ret) | |
122 | val = GRF_EDP_SEL_VOP_LIT | (GRF_EDP_LCD_SEL_MASK << 16); | |
123 | else | |
124 | val = GRF_EDP_SEL_VOP_BIG | (GRF_EDP_LCD_SEL_MASK << 16); | |
125 | ||
126 | dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG"); | |
127 | ||
128 | ret = regmap_write(dp->grf, GRF_SOC_CON6, val); | |
129 | if (ret != 0) { | |
130 | dev_err(dp->dev, "Could not write to GRF: %d\n", ret); | |
131 | return; | |
132 | } | |
133 | } | |
134 | ||
135 | static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder) | |
136 | { | |
137 | /* do nothing */ | |
138 | } | |
139 | ||
4e257d9e MY |
140 | static int |
141 | rockchip_dp_drm_encoder_atomic_check(struct drm_encoder *encoder, | |
142 | struct drm_crtc_state *crtc_state, | |
143 | struct drm_connector_state *conn_state) | |
144 | { | |
145 | struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); | |
146 | ||
147 | /* | |
148 | * FIXME(Yakir): driver should configure the CRTC output video | |
149 | * mode with the display information which indicated the monitor | |
150 | * support colorimetry. | |
151 | * | |
152 | * But don't know why the CRTC driver seems could only output the | |
153 | * RGBaaa rightly. For example, if connect the "innolux,n116bge" | |
154 | * eDP screen, EDID would indicated that screen only accepted the | |
155 | * 6bpc mode. But if I configure CRTC to RGB666 output, then eDP | |
156 | * screen would show a blue picture (RGB888 show a green picture). | |
157 | * But if I configure CTRC to RGBaaa, and eDP driver still keep | |
158 | * RGB666 input video mode, then screen would works prefect. | |
159 | */ | |
160 | s->output_mode = ROCKCHIP_OUT_MODE_AAAA; | |
161 | s->output_type = DRM_MODE_CONNECTOR_eDP; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
9e32e16e YY |
166 | static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = { |
167 | .mode_fixup = rockchip_dp_drm_encoder_mode_fixup, | |
168 | .mode_set = rockchip_dp_drm_encoder_mode_set, | |
169 | .enable = rockchip_dp_drm_encoder_enable, | |
170 | .disable = rockchip_dp_drm_encoder_nop, | |
4e257d9e | 171 | .atomic_check = rockchip_dp_drm_encoder_atomic_check, |
9e32e16e YY |
172 | }; |
173 | ||
174 | static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder) | |
175 | { | |
176 | drm_encoder_cleanup(encoder); | |
177 | } | |
178 | ||
179 | static struct drm_encoder_funcs rockchip_dp_encoder_funcs = { | |
180 | .destroy = rockchip_dp_drm_encoder_destroy, | |
181 | }; | |
182 | ||
183 | static int rockchip_dp_init(struct rockchip_dp_device *dp) | |
184 | { | |
185 | struct device *dev = dp->dev; | |
186 | struct device_node *np = dev->of_node; | |
187 | int ret; | |
188 | ||
189 | dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); | |
190 | if (IS_ERR(dp->grf)) { | |
191 | dev_err(dev, "failed to get rockchip,grf property\n"); | |
192 | return PTR_ERR(dp->grf); | |
193 | } | |
194 | ||
195 | dp->pclk = devm_clk_get(dev, "pclk"); | |
196 | if (IS_ERR(dp->pclk)) { | |
197 | dev_err(dev, "failed to get pclk property\n"); | |
198 | return PTR_ERR(dp->pclk); | |
199 | } | |
200 | ||
201 | dp->rst = devm_reset_control_get(dev, "dp"); | |
202 | if (IS_ERR(dp->rst)) { | |
203 | dev_err(dev, "failed to get dp reset control\n"); | |
204 | return PTR_ERR(dp->rst); | |
205 | } | |
206 | ||
207 | ret = clk_prepare_enable(dp->pclk); | |
208 | if (ret < 0) { | |
209 | dev_err(dp->dev, "failed to enable pclk %d\n", ret); | |
210 | return ret; | |
211 | } | |
212 | ||
213 | ret = rockchip_dp_pre_init(dp); | |
214 | if (ret < 0) { | |
215 | dev_err(dp->dev, "failed to pre init %d\n", ret); | |
216 | return ret; | |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp) | |
223 | { | |
224 | struct drm_encoder *encoder = &dp->encoder; | |
225 | struct drm_device *drm_dev = dp->drm_dev; | |
226 | struct device *dev = dp->dev; | |
227 | int ret; | |
228 | ||
229 | encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, | |
230 | dev->of_node); | |
231 | DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); | |
232 | ||
233 | ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs, | |
234 | DRM_MODE_ENCODER_TMDS, NULL); | |
235 | if (ret) { | |
236 | DRM_ERROR("failed to initialize encoder with drm\n"); | |
237 | return ret; | |
238 | } | |
239 | ||
240 | drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static int rockchip_dp_bind(struct device *dev, struct device *master, | |
246 | void *data) | |
247 | { | |
248 | struct rockchip_dp_device *dp = dev_get_drvdata(dev); | |
249 | struct drm_device *drm_dev = data; | |
250 | int ret; | |
251 | ||
252 | /* | |
253 | * Just like the probe function said, we don't need the | |
254 | * device drvrate anymore, we should leave the charge to | |
255 | * analogix dp driver, set the device drvdata to NULL. | |
256 | */ | |
257 | dev_set_drvdata(dev, NULL); | |
258 | ||
259 | ret = rockchip_dp_init(dp); | |
260 | if (ret < 0) | |
261 | return ret; | |
262 | ||
263 | dp->drm_dev = drm_dev; | |
264 | ||
265 | ret = rockchip_dp_drm_create_encoder(dp); | |
266 | if (ret) { | |
267 | DRM_ERROR("failed to create drm encoder\n"); | |
268 | return ret; | |
269 | } | |
270 | ||
271 | dp->plat_data.encoder = &dp->encoder; | |
272 | ||
273 | dp->plat_data.dev_type = RK3288_DP; | |
274 | dp->plat_data.power_on = rockchip_dp_poweron; | |
275 | dp->plat_data.power_off = rockchip_dp_powerdown; | |
276 | ||
277 | return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data); | |
278 | } | |
279 | ||
280 | static void rockchip_dp_unbind(struct device *dev, struct device *master, | |
281 | void *data) | |
282 | { | |
283 | return analogix_dp_unbind(dev, master, data); | |
284 | } | |
285 | ||
286 | static const struct component_ops rockchip_dp_component_ops = { | |
287 | .bind = rockchip_dp_bind, | |
288 | .unbind = rockchip_dp_unbind, | |
289 | }; | |
290 | ||
291 | static int rockchip_dp_probe(struct platform_device *pdev) | |
292 | { | |
293 | struct device *dev = &pdev->dev; | |
294 | struct device_node *panel_node, *port, *endpoint; | |
295 | struct rockchip_dp_device *dp; | |
296 | struct drm_panel *panel; | |
297 | ||
298 | port = of_graph_get_port_by_id(dev->of_node, 1); | |
299 | if (!port) { | |
300 | dev_err(dev, "can't find output port\n"); | |
301 | return -EINVAL; | |
302 | } | |
303 | ||
304 | endpoint = of_get_child_by_name(port, "endpoint"); | |
305 | of_node_put(port); | |
306 | if (!endpoint) { | |
307 | dev_err(dev, "no output endpoint found\n"); | |
308 | return -EINVAL; | |
309 | } | |
310 | ||
311 | panel_node = of_graph_get_remote_port_parent(endpoint); | |
312 | of_node_put(endpoint); | |
313 | if (!panel_node) { | |
314 | dev_err(dev, "no output node found\n"); | |
315 | return -EINVAL; | |
316 | } | |
317 | ||
318 | panel = of_drm_find_panel(panel_node); | |
319 | if (!panel) { | |
320 | DRM_ERROR("failed to find panel\n"); | |
321 | of_node_put(panel_node); | |
322 | return -EPROBE_DEFER; | |
323 | } | |
324 | ||
325 | of_node_put(panel_node); | |
326 | ||
327 | dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); | |
328 | if (!dp) | |
329 | return -ENOMEM; | |
330 | ||
331 | dp->dev = dev; | |
332 | ||
333 | dp->plat_data.panel = panel; | |
334 | ||
335 | /* | |
336 | * We just use the drvdata until driver run into component | |
337 | * add function, and then we would set drvdata to null, so | |
338 | * that analogix dp driver could take charge of the drvdata. | |
339 | */ | |
340 | platform_set_drvdata(pdev, dp); | |
341 | ||
342 | return component_add(dev, &rockchip_dp_component_ops); | |
343 | } | |
344 | ||
345 | static int rockchip_dp_remove(struct platform_device *pdev) | |
346 | { | |
347 | component_del(&pdev->dev, &rockchip_dp_component_ops); | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
352 | #ifdef CONFIG_PM_SLEEP | |
353 | static int rockchip_dp_suspend(struct device *dev) | |
354 | { | |
355 | return analogix_dp_suspend(dev); | |
356 | } | |
357 | ||
358 | static int rockchip_dp_resume(struct device *dev) | |
359 | { | |
360 | return analogix_dp_resume(dev); | |
361 | } | |
362 | #endif | |
363 | ||
364 | static const struct dev_pm_ops rockchip_dp_pm_ops = { | |
365 | SET_SYSTEM_SLEEP_PM_OPS(rockchip_dp_suspend, rockchip_dp_resume) | |
366 | }; | |
367 | ||
368 | static const struct of_device_id rockchip_dp_dt_ids[] = { | |
369 | {.compatible = "rockchip,rk3288-dp",}, | |
370 | {} | |
371 | }; | |
372 | MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids); | |
373 | ||
374 | static struct platform_driver rockchip_dp_driver = { | |
375 | .probe = rockchip_dp_probe, | |
376 | .remove = rockchip_dp_remove, | |
377 | .driver = { | |
378 | .name = "rockchip-dp", | |
379 | .owner = THIS_MODULE, | |
380 | .pm = &rockchip_dp_pm_ops, | |
381 | .of_match_table = of_match_ptr(rockchip_dp_dt_ids), | |
382 | }, | |
383 | }; | |
384 | ||
385 | module_platform_driver(rockchip_dp_driver); | |
386 | ||
387 | MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>"); | |
388 | MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>"); | |
389 | MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension"); | |
390 | MODULE_LICENSE("GPL v2"); |