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)
40 * struct rockchip_dp_chip_data - splite the grf setting of kind of chips
41 * @lcdsel_grf_reg: grf register offset of lcdc select
42 * @lcdsel_big: reg value of selecting vop big for eDP
43 * @lcdsel_lit: reg value of selecting vop little for eDP
45 struct rockchip_dp_chip_data {
52 struct rockchip_dp_device {
53 struct drm_device *drm_dev;
55 struct drm_encoder encoder;
56 struct drm_display_mode mode;
60 struct reset_control *rst;
62 const struct rockchip_dp_chip_data *data;
64 struct analogix_dp_plat_data plat_data;
67 static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
69 reset_control_assert(dp->rst);
71 reset_control_deassert(dp->rst);
76 static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
78 struct rockchip_dp_device *dp = to_dp(plat_data);
81 ret = clk_prepare_enable(dp->pclk);
83 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
87 ret = rockchip_dp_pre_init(dp);
89 dev_err(dp->dev, "failed to dp pre init %d\n", ret);
96 static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
98 struct rockchip_dp_device *dp = to_dp(plat_data);
100 clk_disable_unprepare(dp->pclk);
105 static int rockchip_dp_get_modes(struct analogix_dp_plat_data *plat_data,
106 struct drm_connector *connector)
108 struct drm_display_info *di = &connector->display_info;
110 if (di->color_formats & DRM_COLOR_FORMAT_YCRCB444 ||
111 di->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
112 di->color_formats &= ~(DRM_COLOR_FORMAT_YCRCB422 |
113 DRM_COLOR_FORMAT_YCRCB444);
114 di->color_formats |= DRM_COLOR_FORMAT_RGB444;
122 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
123 const struct drm_display_mode *mode,
124 struct drm_display_mode *adjusted_mode)
130 static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
131 struct drm_display_mode *mode,
132 struct drm_display_mode *adjusted)
137 static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
139 struct rockchip_dp_device *dp = to_dp(encoder);
143 ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
148 val = dp->data->lcdsel_lit;
150 val = dp->data->lcdsel_big;
152 dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");
154 ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val);
156 dev_err(dp->dev, "Could not write to GRF: %d\n", ret);
161 static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
167 rockchip_dp_drm_encoder_atomic_check(struct drm_encoder *encoder,
168 struct drm_crtc_state *crtc_state,
169 struct drm_connector_state *conn_state)
171 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
174 * The hardware IC designed that VOP must output the RGB10 video
175 * format to eDP contoller, and if eDP panel only support RGB8,
176 * then eDP contoller should cut down the video data, not via VOP
177 * contoller, that's why we need to hardcode the VOP output mode
180 s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
181 s->output_type = DRM_MODE_CONNECTOR_eDP;
186 static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
187 .mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
188 .mode_set = rockchip_dp_drm_encoder_mode_set,
189 .enable = rockchip_dp_drm_encoder_enable,
190 .disable = rockchip_dp_drm_encoder_nop,
191 .atomic_check = rockchip_dp_drm_encoder_atomic_check,
194 static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder)
196 drm_encoder_cleanup(encoder);
199 static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
200 .destroy = rockchip_dp_drm_encoder_destroy,
203 static int rockchip_dp_init(struct rockchip_dp_device *dp)
205 struct device *dev = dp->dev;
206 struct device_node *np = dev->of_node;
209 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
210 if (IS_ERR(dp->grf)) {
211 dev_err(dev, "failed to get rockchip,grf property\n");
212 return PTR_ERR(dp->grf);
215 dp->pclk = devm_clk_get(dev, "pclk");
216 if (IS_ERR(dp->pclk)) {
217 dev_err(dev, "failed to get pclk property\n");
218 return PTR_ERR(dp->pclk);
221 dp->rst = devm_reset_control_get(dev, "dp");
222 if (IS_ERR(dp->rst)) {
223 dev_err(dev, "failed to get dp reset control\n");
224 return PTR_ERR(dp->rst);
227 ret = clk_prepare_enable(dp->pclk);
229 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
233 ret = rockchip_dp_pre_init(dp);
235 dev_err(dp->dev, "failed to pre init %d\n", ret);
242 static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
244 struct drm_encoder *encoder = &dp->encoder;
245 struct drm_device *drm_dev = dp->drm_dev;
246 struct device *dev = dp->dev;
249 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
251 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
253 ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
254 DRM_MODE_ENCODER_TMDS, NULL);
256 DRM_ERROR("failed to initialize encoder with drm\n");
260 drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);
265 static int rockchip_dp_bind(struct device *dev, struct device *master,
268 struct rockchip_dp_device *dp = dev_get_drvdata(dev);
269 const struct rockchip_dp_chip_data *dp_data;
270 struct drm_device *drm_dev = data;
274 * Just like the probe function said, we don't need the
275 * device drvrate anymore, we should leave the charge to
276 * analogix dp driver, set the device drvdata to NULL.
278 dev_set_drvdata(dev, NULL);
280 dp_data = of_device_get_match_data(dev);
284 ret = rockchip_dp_init(dp);
289 dp->drm_dev = drm_dev;
291 ret = rockchip_dp_drm_create_encoder(dp);
293 DRM_ERROR("failed to create drm encoder\n");
297 dp->plat_data.encoder = &dp->encoder;
299 dp->plat_data.dev_type = ROCKCHIP_DP;
300 dp->plat_data.subdev_type = dp_data->chip_type;
301 dp->plat_data.power_on = rockchip_dp_poweron;
302 dp->plat_data.power_off = rockchip_dp_powerdown;
303 dp->plat_data.get_modes = rockchip_dp_get_modes;
305 return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
308 static void rockchip_dp_unbind(struct device *dev, struct device *master,
311 return analogix_dp_unbind(dev, master, data);
314 static const struct component_ops rockchip_dp_component_ops = {
315 .bind = rockchip_dp_bind,
316 .unbind = rockchip_dp_unbind,
319 static int rockchip_dp_probe(struct platform_device *pdev)
321 struct device *dev = &pdev->dev;
322 struct device_node *panel_node, *port, *endpoint;
323 struct drm_panel *panel = NULL;
324 struct rockchip_dp_device *dp;
326 port = of_graph_get_port_by_id(dev->of_node, 1);
328 endpoint = of_get_child_by_name(port, "endpoint");
331 dev_err(dev, "no output endpoint found\n");
335 panel_node = of_graph_get_remote_port_parent(endpoint);
336 of_node_put(endpoint);
338 dev_err(dev, "no output node found\n");
342 panel = of_drm_find_panel(panel_node);
344 DRM_ERROR("failed to find panel\n");
345 of_node_put(panel_node);
346 return -EPROBE_DEFER;
348 of_node_put(panel_node);
351 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
357 dp->plat_data.panel = panel;
360 * We just use the drvdata until driver run into component
361 * add function, and then we would set drvdata to null, so
362 * that analogix dp driver could take charge of the drvdata.
364 platform_set_drvdata(pdev, dp);
366 return component_add(dev, &rockchip_dp_component_ops);
369 static int rockchip_dp_remove(struct platform_device *pdev)
371 component_del(&pdev->dev, &rockchip_dp_component_ops);
376 static const struct dev_pm_ops rockchip_dp_pm_ops = {
377 #ifdef CONFIG_PM_SLEEP
378 .suspend = analogix_dp_suspend,
379 .resume_early = analogix_dp_resume,
383 static const struct rockchip_dp_chip_data rk3399_edp = {
384 .lcdsel_grf_reg = 0x6250,
385 .lcdsel_big = 0 | BIT(21),
386 .lcdsel_lit = BIT(5) | BIT(21),
387 .chip_type = RK3399_EDP,
390 static const struct rockchip_dp_chip_data rk3288_dp = {
391 .lcdsel_grf_reg = 0x025c,
392 .lcdsel_big = 0 | BIT(21),
393 .lcdsel_lit = BIT(5) | BIT(21),
394 .chip_type = RK3288_DP,
397 static const struct of_device_id rockchip_dp_dt_ids[] = {
398 {.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
399 {.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
402 MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
404 static struct platform_driver rockchip_dp_driver = {
405 .probe = rockchip_dp_probe,
406 .remove = rockchip_dp_remove,
408 .name = "rockchip-dp",
409 .owner = THIS_MODULE,
410 .pm = &rockchip_dp_pm_ops,
411 .of_match_table = of_match_ptr(rockchip_dp_dt_ids),
415 module_platform_driver(rockchip_dp_driver);
417 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
418 MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>");
419 MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension");
420 MODULE_LICENSE("GPL v2");