OpenCloudOS-Kernel/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c

385 lines
9.5 KiB
C

/*
* Rockchip SoC DP (Display Port) interface driver.
*
* Copyright (C) Fuzhou Rockchip Electronics Co., Ltd.
* Author: Andy Yan <andy.yan@rock-chips.com>
* Yakir Yang <ykk@rock-chips.com>
* Jeff Chen <jeff.chen@rock-chips.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/component.h>
#include <linux/mfd/syscon.h>
#include <linux/of_graph.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/clk.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_dp_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <video/of_videomode.h>
#include <video/videomode.h>
#include <drm/bridge/analogix_dp.h>
#include "rockchip_drm_drv.h"
#include "rockchip_drm_vop.h"
#define to_dp(nm) container_of(nm, struct rockchip_dp_device, nm)
/* dp grf register offset */
#define GRF_SOC_CON6 0x025c
#define GRF_EDP_LCD_SEL_MASK BIT(5)
#define GRF_EDP_SEL_VOP_LIT BIT(5)
#define GRF_EDP_SEL_VOP_BIG 0
struct rockchip_dp_device {
struct drm_device *drm_dev;
struct device *dev;
struct drm_encoder encoder;
struct drm_display_mode mode;
struct clk *pclk;
struct regmap *grf;
struct reset_control *rst;
struct analogix_dp_plat_data plat_data;
};
static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
{
reset_control_assert(dp->rst);
usleep_range(10, 20);
reset_control_deassert(dp->rst);
return 0;
}
static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
{
struct rockchip_dp_device *dp = to_dp(plat_data);
int ret;
ret = clk_prepare_enable(dp->pclk);
if (ret < 0) {
dev_err(dp->dev, "failed to enable pclk %d\n", ret);
return ret;
}
ret = rockchip_dp_pre_init(dp);
if (ret < 0) {
dev_err(dp->dev, "failed to dp pre init %d\n", ret);
return ret;
}
return 0;
}
static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
{
struct rockchip_dp_device *dp = to_dp(plat_data);
clk_disable_unprepare(dp->pclk);
return 0;
}
static bool
rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
/* do nothing */
return true;
}
static void rockchip_dp_drm_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted)
{
/* do nothing */
}
static void rockchip_dp_drm_encoder_enable(struct drm_encoder *encoder)
{
struct rockchip_dp_device *dp = to_dp(encoder);
int ret;
u32 val;
/*
* FIXME(Yakir): driver should configure the CRTC output video
* mode with the display information which indicated the monitor
* support colorimetry.
*
* But don't know why the CRTC driver seems could only output the
* RGBaaa rightly. For example, if connect the "innolux,n116bge"
* eDP screen, EDID would indicated that screen only accepted the
* 6bpc mode. But if I configure CRTC to RGB666 output, then eDP
* screen would show a blue picture (RGB888 show a green picture).
* But if I configure CTRC to RGBaaa, and eDP driver still keep
* RGB666 input video mode, then screen would works prefect.
*/
ret = rockchip_drm_crtc_mode_config(encoder->crtc,
DRM_MODE_CONNECTOR_eDP,
ROCKCHIP_OUT_MODE_AAAA);
if (ret < 0) {
dev_err(dp->dev, "Could not set crtc mode config (%d)\n", ret);
return;
}
ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
if (ret < 0)
return;
if (ret)
val = GRF_EDP_SEL_VOP_LIT | (GRF_EDP_LCD_SEL_MASK << 16);
else
val = GRF_EDP_SEL_VOP_BIG | (GRF_EDP_LCD_SEL_MASK << 16);
dev_dbg(dp->dev, "vop %s output to dp\n", (ret) ? "LIT" : "BIG");
ret = regmap_write(dp->grf, GRF_SOC_CON6, val);
if (ret != 0) {
dev_err(dp->dev, "Could not write to GRF: %d\n", ret);
return;
}
}
static void rockchip_dp_drm_encoder_nop(struct drm_encoder *encoder)
{
/* do nothing */
}
static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
.mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
.mode_set = rockchip_dp_drm_encoder_mode_set,
.enable = rockchip_dp_drm_encoder_enable,
.disable = rockchip_dp_drm_encoder_nop,
};
static void rockchip_dp_drm_encoder_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static struct drm_encoder_funcs rockchip_dp_encoder_funcs = {
.destroy = rockchip_dp_drm_encoder_destroy,
};
static int rockchip_dp_init(struct rockchip_dp_device *dp)
{
struct device *dev = dp->dev;
struct device_node *np = dev->of_node;
int ret;
dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
if (IS_ERR(dp->grf)) {
dev_err(dev, "failed to get rockchip,grf property\n");
return PTR_ERR(dp->grf);
}
dp->pclk = devm_clk_get(dev, "pclk");
if (IS_ERR(dp->pclk)) {
dev_err(dev, "failed to get pclk property\n");
return PTR_ERR(dp->pclk);
}
dp->rst = devm_reset_control_get(dev, "dp");
if (IS_ERR(dp->rst)) {
dev_err(dev, "failed to get dp reset control\n");
return PTR_ERR(dp->rst);
}
ret = clk_prepare_enable(dp->pclk);
if (ret < 0) {
dev_err(dp->dev, "failed to enable pclk %d\n", ret);
return ret;
}
ret = rockchip_dp_pre_init(dp);
if (ret < 0) {
dev_err(dp->dev, "failed to pre init %d\n", ret);
return ret;
}
return 0;
}
static int rockchip_dp_drm_create_encoder(struct rockchip_dp_device *dp)
{
struct drm_encoder *encoder = &dp->encoder;
struct drm_device *drm_dev = dp->drm_dev;
struct device *dev = dp->dev;
int ret;
encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
dev->of_node);
DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
ret = drm_encoder_init(drm_dev, encoder, &rockchip_dp_encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
if (ret) {
DRM_ERROR("failed to initialize encoder with drm\n");
return ret;
}
drm_encoder_helper_add(encoder, &rockchip_dp_encoder_helper_funcs);
return 0;
}
static int rockchip_dp_bind(struct device *dev, struct device *master,
void *data)
{
struct rockchip_dp_device *dp = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
int ret;
/*
* Just like the probe function said, we don't need the
* device drvrate anymore, we should leave the charge to
* analogix dp driver, set the device drvdata to NULL.
*/
dev_set_drvdata(dev, NULL);
ret = rockchip_dp_init(dp);
if (ret < 0)
return ret;
dp->drm_dev = drm_dev;
ret = rockchip_dp_drm_create_encoder(dp);
if (ret) {
DRM_ERROR("failed to create drm encoder\n");
return ret;
}
dp->plat_data.encoder = &dp->encoder;
dp->plat_data.dev_type = RK3288_DP;
dp->plat_data.power_on = rockchip_dp_poweron;
dp->plat_data.power_off = rockchip_dp_powerdown;
return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
}
static void rockchip_dp_unbind(struct device *dev, struct device *master,
void *data)
{
return analogix_dp_unbind(dev, master, data);
}
static const struct component_ops rockchip_dp_component_ops = {
.bind = rockchip_dp_bind,
.unbind = rockchip_dp_unbind,
};
static int rockchip_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *panel_node, *port, *endpoint;
struct rockchip_dp_device *dp;
struct drm_panel *panel;
port = of_graph_get_port_by_id(dev->of_node, 1);
if (!port) {
dev_err(dev, "can't find output port\n");
return -EINVAL;
}
endpoint = of_get_child_by_name(port, "endpoint");
of_node_put(port);
if (!endpoint) {
dev_err(dev, "no output endpoint found\n");
return -EINVAL;
}
panel_node = of_graph_get_remote_port_parent(endpoint);
of_node_put(endpoint);
if (!panel_node) {
dev_err(dev, "no output node found\n");
return -EINVAL;
}
panel = of_drm_find_panel(panel_node);
if (!panel) {
DRM_ERROR("failed to find panel\n");
of_node_put(panel_node);
return -EPROBE_DEFER;
}
of_node_put(panel_node);
dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
if (!dp)
return -ENOMEM;
dp->dev = dev;
dp->plat_data.panel = panel;
/*
* We just use the drvdata until driver run into component
* add function, and then we would set drvdata to null, so
* that analogix dp driver could take charge of the drvdata.
*/
platform_set_drvdata(pdev, dp);
return component_add(dev, &rockchip_dp_component_ops);
}
static int rockchip_dp_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &rockchip_dp_component_ops);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int rockchip_dp_suspend(struct device *dev)
{
return analogix_dp_suspend(dev);
}
static int rockchip_dp_resume(struct device *dev)
{
return analogix_dp_resume(dev);
}
#endif
static const struct dev_pm_ops rockchip_dp_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(rockchip_dp_suspend, rockchip_dp_resume)
};
static const struct of_device_id rockchip_dp_dt_ids[] = {
{.compatible = "rockchip,rk3288-dp",},
{}
};
MODULE_DEVICE_TABLE(of, rockchip_dp_dt_ids);
static struct platform_driver rockchip_dp_driver = {
.probe = rockchip_dp_probe,
.remove = rockchip_dp_remove,
.driver = {
.name = "rockchip-dp",
.owner = THIS_MODULE,
.pm = &rockchip_dp_pm_ops,
.of_match_table = of_match_ptr(rockchip_dp_dt_ids),
},
};
module_platform_driver(rockchip_dp_driver);
MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
MODULE_AUTHOR("Jeff chen <jeff.chen@rock-chips.com>");
MODULE_DESCRIPTION("Rockchip Specific Analogix-DP Driver Extension");
MODULE_LICENSE("GPL v2");