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_device.h>
18 #include <linux/of_graph.h>
19 #include <linux/regmap.h>
20 #include <linux/reset.h>
21 #include <linux/clk.h>
24 #include <drm/drm_crtc_helper.h>
25 #include <drm/drm_dp_helper.h>
26 #include <drm/drm_of.h>
27 #include <drm/drm_panel.h>
29 #include <video/of_videomode.h>
30 #include <video/videomode.h>
32 #include <drm/bridge/analogix_dp.h>
34 #include "rockchip_drm_drv.h"
35 #include "rockchip_drm_vop.h"
37 #define to_dp(nm) container_of(nm, struct rockchip_dp_device, nm)
39 struct analogix_dp_data {
46 struct rockchip_dp_device {
47 struct drm_device *drm_dev;
49 struct drm_encoder encoder;
50 struct drm_display_mode mode;
54 struct reset_control *rst;
56 const struct analogix_dp_data *data;
57 struct analogix_dp_plat_data plat_data;
60 static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
62 reset_control_assert(dp->rst);
64 reset_control_deassert(dp->rst);
69 static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
71 struct rockchip_dp_device *dp = to_dp(plat_data);
74 ret = clk_prepare_enable(dp->pclk);
76 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
80 ret = rockchip_dp_pre_init(dp);
82 dev_err(dp->dev, "failed to dp pre init %d\n", ret);
89 static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
91 struct rockchip_dp_device *dp = to_dp(plat_data);
93 clk_disable_unprepare(dp->pclk);
99 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
100 const struct drm_display_mode *mode,
101 struct drm_display_mode *adjusted_mode)
104 * FIXME(Yakir): driver should configure the CRTC output video
105 * mode with the display information which indicated the monitor
106 * support colorimetry.
108 * But don't know why the CRTC driver seems could only output the
109 * RGBaaa rightly. For example, if connect the "innolux,n116bge"
110 * eDP screen, EDID would indicated that screen only accepted the
111 * 6bpc mode. But if I configure CRTC to RGB666 output, then eDP
112 * screen would show a blue picture (RGB888 show a green picture).
113 * But if I configure CTRC to RGBaaa, and eDP driver still keep
114 * RGB666 input video mode, then screen would works prefect.
116 adjusted_mode->private_flags = ROCKCHIP_DSP_MODE(eDP, AAAA);
122 static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
123 struct drm_display_mode *mode,
124 struct drm_display_mode *adjusted)
129 static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
131 struct rockchip_dp_device *dp = to_dp(encoder);
135 ret = rockchip_drm_encoder_get_mux_id(dp->dev->of_node, encoder);
140 val = dp->data->lcdsel_lit | dp->data->lcdsel_mask;
142 val = dp->data->lcdsel_big | dp->data->lcdsel_mask;
144 dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");
146 ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val);
148 dev_err(dp->dev, "Could not write to GRF: %d\n", ret);
153 static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
158 static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
159 .mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
160 .mode_set = rockchip_dp_drm_encoder_mode_set,
161 .enable = rockchip_dp_drm_encoder_enable,
162 .disable = rockchip_dp_drm_encoder_nop,
165 static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder)
167 drm_encoder_cleanup(encoder);
170 static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
171 .destroy = rockchip_dp_drm_encoder_destroy,
174 static int rockchip_dp_init(struct rockchip_dp_device *dp)
176 struct device *dev = dp->dev;
177 struct device_node *np = dev->of_node;
180 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
181 if (IS_ERR(dp->grf)) {
182 dev_err(dev, "failed to get rockchip,grf property\n");
183 return PTR_ERR(dp->grf);
186 dp->pclk = devm_clk_get(dev, "pclk");
187 if (IS_ERR(dp->pclk)) {
188 dev_err(dev, "failed to get pclk property\n");
189 return PTR_ERR(dp->pclk);
192 dp->rst = devm_reset_control_get(dev, "dp");
193 if (IS_ERR(dp->rst)) {
194 dev_err(dev, "failed to get dp reset control\n");
195 return PTR_ERR(dp->rst);
198 ret = clk_prepare_enable(dp->pclk);
200 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
204 ret = rockchip_dp_pre_init(dp);
206 dev_err(dp->dev, "failed to pre init %d\n", ret);
213 static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
215 struct drm_encoder *encoder = &dp->encoder;
216 struct drm_device *drm_dev = dp->drm_dev;
217 struct device *dev = dp->dev;
220 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
222 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
224 ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
225 DRM_MODE_ENCODER_TMDS, NULL);
227 DRM_ERROR("failed to initialize encoder with drm\n");
231 drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);
236 static int rockchip_dp_bind(struct device *dev, struct device *master,
239 struct rockchip_dp_device *dp = dev_get_drvdata(dev);
240 const struct analogix_dp_data *dp_data;
241 struct drm_device *drm_dev = data;
245 * Just like the probe function said, we don't need the
246 * device drvrate anymore, we should leave the charge to
247 * analogix dp driver, set the device drvdata to NULL.
249 dev_set_drvdata(dev, NULL);
251 dp_data = of_device_get_match_data(dev);
255 ret = rockchip_dp_init(dp);
260 dp->drm_dev = drm_dev;
262 ret = rockchip_dp_drm_create_encoder(dp);
264 DRM_ERROR("failed to create drm encoder\n");
268 dp->plat_data.encoder = &dp->encoder;
270 dp->plat_data.dev_type = RK3288_DP;
271 dp->plat_data.power_on = rockchip_dp_poweron;
272 dp->plat_data.power_off = rockchip_dp_powerdown;
274 return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
277 static void rockchip_dp_unbind(struct device *dev, struct device *master,
280 return analogix_dp_unbind(dev, master, data);
283 static const struct component_ops rockchip_dp_component_ops = {
284 .bind = rockchip_dp_bind,
285 .unbind = rockchip_dp_unbind,
288 static int rockchip_dp_probe(struct platform_device *pdev)
290 struct device *dev = &pdev->dev;
291 struct device_node *panel_node, *port, *endpoint;
292 struct rockchip_dp_device *dp;
293 struct drm_panel *panel;
295 port = of_graph_get_port_by_id(dev->of_node, 1);
297 dev_err(dev, "can't find output port\n");
301 endpoint = of_get_child_by_name(port, "endpoint");
304 dev_err(dev, "no output endpoint found\n");
308 panel_node = of_graph_get_remote_port_parent(endpoint);
309 of_node_put(endpoint);
311 dev_err(dev, "no output node found\n");
315 panel = of_drm_find_panel(panel_node);
317 DRM_ERROR("failed to find panel\n");
318 of_node_put(panel_node);
319 return -EPROBE_DEFER;
322 of_node_put(panel_node);
324 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
330 dp->plat_data.panel = panel;
333 * We just use the drvdata until driver run into component
334 * add function, and then we would set drvdata to null, so
335 * that analogix dp driver could take charge of the drvdata.
337 platform_set_drvdata(pdev, dp);
339 return component_add(dev, &rockchip_dp_component_ops);
342 static int rockchip_dp_remove(struct platform_device *pdev)
344 component_del(&pdev->dev, &rockchip_dp_component_ops);
349 #ifdef CONFIG_PM_SLEEP
350 static int rockchip_dp_suspend(struct device *dev)
352 return analogix_dp_suspend(dev);
355 static int rockchip_dp_resume(struct device *dev)
357 return analogix_dp_resume(dev);
361 static const struct dev_pm_ops rockchip_dp_pm_ops = {
362 SET_SYSTEM_SLEEP_PM_OPS(rockchip_dp_suspend, rockchip_dp_resume)
365 static const struct analogix_dp_data rk3399_edp = {
366 .lcdsel_grf_reg = 0x6250,
368 .lcdsel_lit = BIT(5),
369 .lcdsel_mask = BIT(21),
372 static const struct analogix_dp_data rk3288_dp = {
373 .lcdsel_grf_reg = 0x025c,
375 .lcdsel_lit = BIT(5),
376 .lcdsel_mask = BIT(21),
379 static const struct of_device_id rockchip_dp_dt_ids[] = {
380 {.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
381 {.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
384 MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
386 static struct platform_driver rockchip_dp_driver = {
387 .probe = rockchip_dp_probe,
388 .remove = rockchip_dp_remove,
390 .name = "rockchip-dp",
391 .owner = THIS_MODULE,
392 .pm = &rockchip_dp_pm_ops,
393 .of_match_table = of_match_ptr(rockchip_dp_dt_ids),
397 module_platform_driver(rockchip_dp_driver);
399 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
400 MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>");
401 MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension");
402 MODULE_LICENSE("GPL v2");