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 enum rockchip_dp_chip_type {
44 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 enum drm_mode_status
106 rockchip_dp_mode_valid(struct analogix_dp_plat_data *plat_data,
107 struct drm_connector *connector,
108 struct drm_display_mode *mode)
110 struct drm_display_info *di = &connector->display_info;
112 if (di->color_formats & DRM_COLOR_FORMAT_YCRCB444 ||
113 di->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
114 di->color_formats &= ~(DRM_COLOR_FORMAT_YCRCB422 |
115 DRM_COLOR_FORMAT_YCRCB444);
116 di->color_formats |= DRM_COLOR_FORMAT_RGB444;
124 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
125 const struct drm_display_mode *mode,
126 struct drm_display_mode *adjusted_mode)
128 struct rockchip_dp_device *dp = to_dp(encoder);
133 * The hardware IC designed that VOP must output the RGB10 video
134 * format to eDP contoller, and if eDP panel only support RGB8,
135 * then eDP contoller should cut down the video data, not via VOP
136 * contoller, that's why we need to hardcode the VOP output mode
140 ret = rockchip_drm_encoder_get_mux_id(dp->dev->of_node, encoder);
144 switch (dp->data->chip_type) {
147 * For RK3399, VOP Lit must code the out mode to RGB888,
148 * VOP Big must code the out mode to RGB10.
151 private_flags = ROCKCHIP_DSP_MODE(eDP, P888);
153 private_flags = ROCKCHIP_DSP_MODE(eDP, AAAA);
157 private_flags = ROCKCHIP_DSP_MODE(eDP, AAAA);
161 adjusted_mode->private_flags = private_flags;
166 static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
167 struct drm_display_mode *mode,
168 struct drm_display_mode *adjusted)
173 static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
175 struct rockchip_dp_device *dp = to_dp(encoder);
179 ret = rockchip_drm_encoder_get_mux_id(dp->dev->of_node, encoder);
184 val = dp->data->lcdsel_lit | dp->data->lcdsel_mask;
186 val = dp->data->lcdsel_big | dp->data->lcdsel_mask;
188 dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");
190 ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val);
192 dev_err(dp->dev, "Could not write to GRF: %d\n", ret);
197 static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
202 static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
203 .mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
204 .mode_set = rockchip_dp_drm_encoder_mode_set,
205 .enable = rockchip_dp_drm_encoder_enable,
206 .disable = rockchip_dp_drm_encoder_nop,
209 static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder)
211 drm_encoder_cleanup(encoder);
214 static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
215 .destroy = rockchip_dp_drm_encoder_destroy,
218 static int rockchip_dp_init(struct rockchip_dp_device *dp)
220 struct device *dev = dp->dev;
221 struct device_node *np = dev->of_node;
224 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
225 if (IS_ERR(dp->grf)) {
226 dev_err(dev, "failed to get rockchip,grf property\n");
227 return PTR_ERR(dp->grf);
230 dp->pclk = devm_clk_get(dev, "pclk");
231 if (IS_ERR(dp->pclk)) {
232 dev_err(dev, "failed to get pclk property\n");
233 return PTR_ERR(dp->pclk);
236 dp->rst = devm_reset_control_get(dev, "dp");
237 if (IS_ERR(dp->rst)) {
238 dev_err(dev, "failed to get dp reset control\n");
239 return PTR_ERR(dp->rst);
242 ret = clk_prepare_enable(dp->pclk);
244 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
248 ret = rockchip_dp_pre_init(dp);
250 dev_err(dp->dev, "failed to pre init %d\n", ret);
257 static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
259 struct drm_encoder *encoder = &dp->encoder;
260 struct drm_device *drm_dev = dp->drm_dev;
261 struct device *dev = dp->dev;
264 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
266 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
268 ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
269 DRM_MODE_ENCODER_TMDS, NULL);
271 DRM_ERROR("failed to initialize encoder with drm\n");
275 drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);
280 static int rockchip_dp_bind(struct device *dev, struct device *master,
283 struct rockchip_dp_device *dp = dev_get_drvdata(dev);
284 const struct rockchip_dp_chip_data *dp_data;
285 struct drm_device *drm_dev = data;
289 * Just like the probe function said, we don't need the
290 * device drvrate anymore, we should leave the charge to
291 * analogix dp driver, set the device drvdata to NULL.
293 dev_set_drvdata(dev, NULL);
295 dp_data = of_device_get_match_data(dev);
299 ret = rockchip_dp_init(dp);
304 dp->drm_dev = drm_dev;
306 ret = rockchip_dp_drm_create_encoder(dp);
308 DRM_ERROR("failed to create drm encoder\n");
312 dp->plat_data.encoder = &dp->encoder;
314 dp->plat_data.dev_type = ROCKCHIP_DP;
315 dp->plat_data.power_on = rockchip_dp_poweron;
316 dp->plat_data.power_off = rockchip_dp_powerdown;
317 dp->plat_data.mode_valid = rockchip_dp_mode_valid;
319 return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
322 static void rockchip_dp_unbind(struct device *dev, struct device *master,
325 return analogix_dp_unbind(dev, master, data);
328 static const struct component_ops rockchip_dp_component_ops = {
329 .bind = rockchip_dp_bind,
330 .unbind = rockchip_dp_unbind,
333 static int rockchip_dp_probe(struct platform_device *pdev)
335 struct device *dev = &pdev->dev;
336 struct device_node *panel_node, *port, *endpoint;
337 struct drm_panel *panel = NULL;
338 struct rockchip_dp_device *dp;
340 port = of_graph_get_port_by_id(dev->of_node, 1);
342 endpoint = of_get_child_by_name(port, "endpoint");
345 dev_err(dev, "no output endpoint found\n");
349 panel_node = of_graph_get_remote_port_parent(endpoint);
350 of_node_put(endpoint);
352 dev_err(dev, "no output node found\n");
356 panel = of_drm_find_panel(panel_node);
358 DRM_ERROR("failed to find panel\n");
359 of_node_put(panel_node);
360 return -EPROBE_DEFER;
362 of_node_put(panel_node);
365 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
371 dp->plat_data.panel = panel;
374 * We just use the drvdata until driver run into component
375 * add function, and then we would set drvdata to null, so
376 * that analogix dp driver could take charge of the drvdata.
378 platform_set_drvdata(pdev, dp);
380 return component_add(dev, &rockchip_dp_component_ops);
383 static int rockchip_dp_remove(struct platform_device *pdev)
385 component_del(&pdev->dev, &rockchip_dp_component_ops);
390 #ifdef CONFIG_PM_SLEEP
391 static int rockchip_dp_suspend(struct device *dev)
393 return analogix_dp_suspend(dev);
396 static int rockchip_dp_resume(struct device *dev)
398 return analogix_dp_resume(dev);
402 static const struct dev_pm_ops rockchip_dp_pm_ops = {
403 SET_SYSTEM_SLEEP_PM_OPS(rockchip_dp_suspend, rockchip_dp_resume)
406 static const struct rockchip_dp_chip_data rk3399_edp = {
407 .lcdsel_grf_reg = 0x6250,
409 .lcdsel_lit = BIT(5),
410 .lcdsel_mask = BIT(21),
411 .chip_type = RK3399_EDP,
414 static const struct rockchip_dp_chip_data rk3288_dp = {
415 .lcdsel_grf_reg = 0x025c,
417 .lcdsel_lit = BIT(5),
418 .lcdsel_mask = BIT(21),
419 .chip_type = RK3288_DP,
422 static const struct of_device_id rockchip_dp_dt_ids[] = {
423 {.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
424 {.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
427 MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
429 static struct platform_driver rockchip_dp_driver = {
430 .probe = rockchip_dp_probe,
431 .remove = rockchip_dp_remove,
433 .name = "rockchip-dp",
434 .owner = THIS_MODULE,
435 .pm = &rockchip_dp_pm_ops,
436 .of_match_table = of_match_ptr(rockchip_dp_dt_ids),
440 module_platform_driver(rockchip_dp_driver);
442 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
443 MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>");
444 MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension");
445 MODULE_LICENSE("GPL v2");