2 * Rockchip SoC DP (Display Port) interface driver.
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>
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.
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>
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>
28 #include <video/of_videomode.h>
29 #include <video/videomode.h>
31 #include <drm/bridge/analogix_dp.h>
33 #include "rockchip_drm_drv.h"
34 #include "rockchip_drm_vop.h"
36 #define to_dp(nm) container_of(nm, struct rockchip_dp_device, nm)
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
44 struct rockchip_dp_device {
45 struct drm_device *drm_dev;
47 struct drm_encoder encoder;
48 struct drm_display_mode mode;
52 struct reset_control *rst;
54 struct analogix_dp_plat_data plat_data;
57 static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
59 reset_control_assert(dp->rst);
61 reset_control_deassert(dp->rst);
66 static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
68 struct rockchip_dp_device *dp = to_dp(plat_data);
71 ret = clk_prepare_enable(dp->pclk);
73 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
77 ret = rockchip_dp_pre_init(dp);
79 dev_err(dp->dev, "failed to dp pre init %d\n", ret);
86 static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
88 struct rockchip_dp_device *dp = to_dp(plat_data);
90 clk_disable_unprepare(dp->pclk);
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)
101 * FIXME(Yakir): driver should configure the CRTC output video
102 * mode with the display information which indicated the monitor
103 * support colorimetry.
105 * But don't know why the CRTC driver seems could only output the
106 * RGBaaa rightly. For example, if connect the "innolux,n116bge"
107 * eDP screen, EDID would indicated that screen only accepted the
108 * 6bpc mode. But if I configure CRTC to RGB666 output, then eDP
109 * screen would show a blue picture (RGB888 show a green picture).
110 * But if I configure CTRC to RGBaaa, and eDP driver still keep
111 * RGB666 input video mode, then screen would works prefect.
113 adjusted_mode->private_flags = ROCKCHIP_DSP_MODE(eDP, AAAA);
119 static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
120 struct drm_display_mode *mode,
121 struct drm_display_mode *adjusted)
126 static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
128 struct rockchip_dp_device *dp = to_dp(encoder);
132 ret = rockchip_drm_encoder_get_mux_id(dp->dev->of_node, encoder);
137 val = GRF_EDP_SEL_VOP_LIT | (GRF_EDP_LCD_SEL_MASK << 16);
139 val = GRF_EDP_SEL_VOP_BIG | (GRF_EDP_LCD_SEL_MASK << 16);
141 dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");
143 ret = regmap_write(dp->grf, GRF_SOC_CON6, val);
145 dev_err(dp->dev, "Could not write to GRF: %d\n", ret);
150 static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
155 static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
156 .mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
157 .mode_set = rockchip_dp_drm_encoder_mode_set,
158 .enable = rockchip_dp_drm_encoder_enable,
159 .disable = rockchip_dp_drm_encoder_nop,
162 static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder)
164 drm_encoder_cleanup(encoder);
167 static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
168 .destroy = rockchip_dp_drm_encoder_destroy,
171 static int rockchip_dp_init(struct rockchip_dp_device *dp)
173 struct device *dev = dp->dev;
174 struct device_node *np = dev->of_node;
177 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
178 if (IS_ERR(dp->grf)) {
179 dev_err(dev, "failed to get rockchip,grf property\n");
180 return PTR_ERR(dp->grf);
183 dp->pclk = devm_clk_get(dev, "pclk");
184 if (IS_ERR(dp->pclk)) {
185 dev_err(dev, "failed to get pclk property\n");
186 return PTR_ERR(dp->pclk);
189 dp->rst = devm_reset_control_get(dev, "dp");
190 if (IS_ERR(dp->rst)) {
191 dev_err(dev, "failed to get dp reset control\n");
192 return PTR_ERR(dp->rst);
195 ret = clk_prepare_enable(dp->pclk);
197 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
201 ret = rockchip_dp_pre_init(dp);
203 dev_err(dp->dev, "failed to pre init %d\n", ret);
210 static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
212 struct drm_encoder *encoder = &dp->encoder;
213 struct drm_device *drm_dev = dp->drm_dev;
214 struct device *dev = dp->dev;
217 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
219 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
221 ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
222 DRM_MODE_ENCODER_TMDS, NULL);
224 DRM_ERROR("failed to initialize encoder with drm\n");
228 drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);
233 static int rockchip_dp_bind(struct device *dev, struct device *master,
236 struct rockchip_dp_device *dp = dev_get_drvdata(dev);
237 struct drm_device *drm_dev = data;
241 * Just like the probe function said, we don't need the
242 * device drvrate anymore, we should leave the charge to
243 * analogix dp driver, set the device drvdata to NULL.
245 dev_set_drvdata(dev, NULL);
247 ret = rockchip_dp_init(dp);
251 dp->drm_dev = drm_dev;
253 ret = rockchip_dp_drm_create_encoder(dp);
255 DRM_ERROR("failed to create drm encoder\n");
259 dp->plat_data.encoder = &dp->encoder;
261 dp->plat_data.dev_type = RK3288_DP;
262 dp->plat_data.power_on = rockchip_dp_poweron;
263 dp->plat_data.power_off = rockchip_dp_powerdown;
265 return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
268 static void rockchip_dp_unbind(struct device *dev, struct device *master,
271 return analogix_dp_unbind(dev, master, data);
274 static const struct component_ops rockchip_dp_component_ops = {
275 .bind = rockchip_dp_bind,
276 .unbind = rockchip_dp_unbind,
279 static int rockchip_dp_probe(struct platform_device *pdev)
281 struct device *dev = &pdev->dev;
282 struct device_node *panel_node, *port, *endpoint;
283 struct rockchip_dp_device *dp;
284 struct drm_panel *panel;
286 port = of_graph_get_port_by_id(dev->of_node, 1);
288 dev_err(dev, "can't find output port\n");
292 endpoint = of_get_child_by_name(port, "endpoint");
295 dev_err(dev, "no output endpoint found\n");
299 panel_node = of_graph_get_remote_port_parent(endpoint);
300 of_node_put(endpoint);
302 dev_err(dev, "no output node found\n");
306 panel = of_drm_find_panel(panel_node);
308 DRM_ERROR("failed to find panel\n");
309 of_node_put(panel_node);
310 return -EPROBE_DEFER;
313 of_node_put(panel_node);
315 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
321 dp->plat_data.panel = panel;
324 * We just use the drvdata until driver run into component
325 * add function, and then we would set drvdata to null, so
326 * that analogix dp driver could take charge of the drvdata.
328 platform_set_drvdata(pdev, dp);
330 return component_add(dev, &rockchip_dp_component_ops);
333 static int rockchip_dp_remove(struct platform_device *pdev)
335 component_del(&pdev->dev, &rockchip_dp_component_ops);
340 #ifdef CONFIG_PM_SLEEP
341 static int rockchip_dp_suspend(struct device *dev)
343 return analogix_dp_suspend(dev);
346 static int rockchip_dp_resume(struct device *dev)
348 return analogix_dp_resume(dev);
352 static const struct dev_pm_ops rockchip_dp_pm_ops = {
353 SET_SYSTEM_SLEEP_PM_OPS(rockchip_dp_suspend, rockchip_dp_resume)
356 static const struct of_device_id rockchip_dp_dt_ids[] = {
357 {.compatible = "rockchip,rk3288-dp",},
358 {.compatible = "rockchip,rk3399-edp",},
361 MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
363 static struct platform_driver rockchip_dp_driver = {
364 .probe = rockchip_dp_probe,
365 .remove = rockchip_dp_remove,
367 .name = "rockchip-dp",
368 .owner = THIS_MODULE,
369 .pm = &rockchip_dp_pm_ops,
370 .of_match_table = of_match_ptr(rockchip_dp_dt_ids),
374 module_platform_driver(rockchip_dp_driver);
376 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
377 MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>");
378 MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension");
379 MODULE_LICENSE("GPL v2");