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 rockchip_dp_chip_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 rockchip_dp_chip_data *data;
58 struct analogix_dp_plat_data plat_data;
61 static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
63 reset_control_assert(dp->rst);
65 reset_control_deassert(dp->rst);
70 static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
72 struct rockchip_dp_device *dp = to_dp(plat_data);
75 ret = clk_prepare_enable(dp->pclk);
77 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
81 ret = rockchip_dp_pre_init(dp);
83 dev_err(dp->dev, "failed to dp pre init %d\n", ret);
90 static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
92 struct rockchip_dp_device *dp = to_dp(plat_data);
94 clk_disable_unprepare(dp->pclk);
99 static enum drm_mode_status
100 rockchip_dp_mode_valid(struct analogix_dp_plat_data *plat_data,
101 struct drm_connector *connector,
102 struct drm_display_mode *mode)
104 struct drm_display_info *di = &connector->display_info;
106 if (di->color_formats & DRM_COLOR_FORMAT_YCRCB444 ||
107 di->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
108 di->color_formats &= ~(DRM_COLOR_FORMAT_YCRCB422 |
109 DRM_COLOR_FORMAT_YCRCB444);
110 di->color_formats |= DRM_COLOR_FORMAT_RGB444;
118 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
119 const struct drm_display_mode *mode,
120 struct drm_display_mode *adjusted_mode)
123 * The hardware IC designed that VOP must output the RGB10 video
124 * format to eDP contoller, and if eDP panel only support RGB8,
125 * then eDP contoller should cut down the video data, not via VOP
126 * contoller, that's why we need to hardcode the VOP output mode
129 adjusted_mode->private_flags = ROCKCHIP_DSP_MODE(eDP, AAAA);
134 static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
135 struct drm_display_mode *mode,
136 struct drm_display_mode *adjusted)
141 static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
143 struct rockchip_dp_device *dp = to_dp(encoder);
147 ret = rockchip_drm_encoder_get_mux_id(dp->dev->of_node, encoder);
152 val = dp->data->lcdsel_lit | dp->data->lcdsel_mask;
154 val = dp->data->lcdsel_big | dp->data->lcdsel_mask;
156 dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");
158 ret = regmap_write(dp->grf, dp->data->lcdsel_grf_reg, val);
160 dev_err(dp->dev, "Could not write to GRF: %d\n", ret);
165 static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
170 static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
171 .mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
172 .mode_set = rockchip_dp_drm_encoder_mode_set,
173 .enable = rockchip_dp_drm_encoder_enable,
174 .disable = rockchip_dp_drm_encoder_nop,
177 static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder)
179 drm_encoder_cleanup(encoder);
182 static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
183 .destroy = rockchip_dp_drm_encoder_destroy,
186 static int rockchip_dp_init(struct rockchip_dp_device *dp)
188 struct device *dev = dp->dev;
189 struct device_node *np = dev->of_node;
192 dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
193 if (IS_ERR(dp->grf)) {
194 dev_err(dev, "failed to get rockchip,grf property\n");
195 return PTR_ERR(dp->grf);
198 dp->pclk = devm_clk_get(dev, "pclk");
199 if (IS_ERR(dp->pclk)) {
200 dev_err(dev, "failed to get pclk property\n");
201 return PTR_ERR(dp->pclk);
204 dp->rst = devm_reset_control_get(dev, "dp");
205 if (IS_ERR(dp->rst)) {
206 dev_err(dev, "failed to get dp reset control\n");
207 return PTR_ERR(dp->rst);
210 ret = clk_prepare_enable(dp->pclk);
212 dev_err(dp->dev, "failed to enable pclk %d\n", ret);
216 ret = rockchip_dp_pre_init(dp);
218 dev_err(dp->dev, "failed to pre init %d\n", ret);
225 static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
227 struct drm_encoder *encoder = &dp->encoder;
228 struct drm_device *drm_dev = dp->drm_dev;
229 struct device *dev = dp->dev;
232 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
234 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
236 ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
237 DRM_MODE_ENCODER_TMDS, NULL);
239 DRM_ERROR("failed to initialize encoder with drm\n");
243 drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);
248 static int rockchip_dp_bind(struct device *dev, struct device *master,
251 struct rockchip_dp_device *dp = dev_get_drvdata(dev);
252 const struct rockchip_dp_chip_data *dp_data;
253 struct drm_device *drm_dev = data;
257 * Just like the probe function said, we don't need the
258 * device drvrate anymore, we should leave the charge to
259 * analogix dp driver, set the device drvdata to NULL.
261 dev_set_drvdata(dev, NULL);
263 dp_data = of_device_get_match_data(dev);
267 ret = rockchip_dp_init(dp);
272 dp->drm_dev = drm_dev;
274 ret = rockchip_dp_drm_create_encoder(dp);
276 DRM_ERROR("failed to create drm encoder\n");
280 dp->plat_data.encoder = &dp->encoder;
282 dp->plat_data.dev_type = ROCKCHIP_DP;
283 dp->plat_data.power_on = rockchip_dp_poweron;
284 dp->plat_data.power_off = rockchip_dp_powerdown;
285 dp->plat_data.mode_valid = rockchip_dp_mode_valid;
287 return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
290 static void rockchip_dp_unbind(struct device *dev, struct device *master,
293 return analogix_dp_unbind(dev, master, data);
296 static const struct component_ops rockchip_dp_component_ops = {
297 .bind = rockchip_dp_bind,
298 .unbind = rockchip_dp_unbind,
301 static int rockchip_dp_probe(struct platform_device *pdev)
303 struct device *dev = &pdev->dev;
304 struct device_node *panel_node, *port, *endpoint;
305 struct drm_panel *panel = NULL;
306 struct rockchip_dp_device *dp;
308 port = of_graph_get_port_by_id(dev->of_node, 1);
310 endpoint = of_get_child_by_name(port, "endpoint");
313 dev_err(dev, "no output endpoint found\n");
317 panel_node = of_graph_get_remote_port_parent(endpoint);
318 of_node_put(endpoint);
320 dev_err(dev, "no output node found\n");
324 panel = of_drm_find_panel(panel_node);
326 DRM_ERROR("failed to find panel\n");
327 of_node_put(panel_node);
328 return -EPROBE_DEFER;
330 of_node_put(panel_node);
333 dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
339 dp->plat_data.panel = panel;
342 * We just use the drvdata until driver run into component
343 * add function, and then we would set drvdata to null, so
344 * that analogix dp driver could take charge of the drvdata.
346 platform_set_drvdata(pdev, dp);
348 return component_add(dev, &rockchip_dp_component_ops);
351 static int rockchip_dp_remove(struct platform_device *pdev)
353 component_del(&pdev->dev, &rockchip_dp_component_ops);
358 #ifdef CONFIG_PM_SLEEP
359 static int rockchip_dp_suspend(struct device *dev)
361 return analogix_dp_suspend(dev);
364 static int rockchip_dp_resume(struct device *dev)
366 return analogix_dp_resume(dev);
370 static const struct dev_pm_ops rockchip_dp_pm_ops = {
371 SET_SYSTEM_SLEEP_PM_OPS(rockchip_dp_suspend, rockchip_dp_resume)
374 static const struct rockchip_dp_chip_data rk3399_edp = {
375 .lcdsel_grf_reg = 0x6250,
377 .lcdsel_lit = BIT(5),
378 .lcdsel_mask = BIT(21),
381 static const struct rockchip_dp_chip_data rk3288_dp = {
382 .lcdsel_grf_reg = 0x025c,
384 .lcdsel_lit = BIT(5),
385 .lcdsel_mask = BIT(21),
388 static const struct of_device_id rockchip_dp_dt_ids[] = {
389 {.compatible = "rockchip,rk3288-dp", .data = &rk3288_dp },
390 {.compatible = "rockchip,rk3399-edp", .data = &rk3399_edp },
393 MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
395 static struct platform_driver rockchip_dp_driver = {
396 .probe = rockchip_dp_probe,
397 .remove = rockchip_dp_remove,
399 .name = "rockchip-dp",
400 .owner = THIS_MODULE,
401 .pm = &rockchip_dp_pm_ops,
402 .of_match_table = of_match_ptr(rockchip_dp_dt_ids),
406 module_platform_driver(rockchip_dp_driver);
408 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
409 MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>");
410 MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension");
411 MODULE_LICENSE("GPL v2");