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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Samsung SoC DP (Display Port) interface driver.
*
* Copyright (C) 2012 Samsung Electronics Co., Ltd.
* Author: Jingoo Han <jg1.han@samsung.com>
*/
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <video/of_display_timing.h>
#include <video/of_videomode.h>
#include <video/videomode.h>
#include <drm/bridge/analogix_dp.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_crtc.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include <drm/exynos_drm.h>
#include "exynos_drm_crtc.h"
#define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
struct exynos_dp_device {
struct drm_encoder encoder;
struct drm_connector *connector;
struct drm_bridge *ptn_bridge;
struct drm_device *drm_dev;
struct device *dev;
struct videomode vm;
struct analogix_dp_device *adp;
struct analogix_dp_plat_data plat_data;
};
static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
bool enable)
{
struct exynos_dp_device *dp = to_dp(plat_data);
struct drm_encoder *encoder = &dp->encoder;
if (!encoder->crtc)
return -EPERM;
exynos_drm_pipe_clk_enable(to_exynos_crtc(encoder->crtc), enable);
return 0;
}
static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
{
return exynos_dp_crtc_clock_enable(plat_data, true);
}
static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
{
return exynos_dp_crtc_clock_enable(plat_data, false);
}
static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
struct drm_connector *connector)
{
struct exynos_dp_device *dp = to_dp(plat_data);
struct drm_display_mode *mode;
if (dp->plat_data.panel)
return 0;
mode = drm_mode_create(connector->dev);
if (!mode) {
DRM_DEV_ERROR(dp->dev,
"failed to create a new display mode.\n");
return 0;
}
drm_display_mode_from_videomode(&dp->vm, mode);
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_set_name(mode);
drm_mode_probed_add(connector, mode);
return 1;
}
static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
struct drm_bridge *bridge,
struct drm_connector *connector)
{
struct exynos_dp_device *dp = to_dp(plat_data);
int ret;
dp->connector = connector;
/* Pre-empt DP connector creation if there's a bridge */
if (dp->ptn_bridge) {
ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge,
0);
if (ret)
return ret;
}
return 0;
}
static void exynos_dp_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
}
static void exynos_dp_nop(struct drm_encoder *encoder)
{
/* do nothing */
}
static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
.mode_set = exynos_dp_mode_set,
.enable = exynos_dp_nop,
.disable = exynos_dp_nop,
};
static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
{
int ret;
ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
if (ret) {
DRM_DEV_ERROR(dp->dev,
"failed: of_get_videomode() : %d\n", ret);
return ret;
}
return 0;
}
static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
{
struct exynos_dp_device *dp = dev_get_drvdata(dev);
struct drm_encoder *encoder = &dp->encoder;
struct drm_device *drm_dev = data;
int ret;
dp->drm_dev = drm_dev;
if (!dp->plat_data.panel && !dp->ptn_bridge) {
ret = exynos_dp_dt_parse_panel(dp);
if (ret)
return ret;
}
drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
if (ret < 0)
return ret;
dp->plat_data.encoder = encoder;
ret = analogix_dp_bind(dp->adp, dp->drm_dev);
if (ret)
dp->encoder.funcs->destroy(&dp->encoder);
return ret;
}
static void exynos_dp_unbind(struct device *dev, struct device *master,
void *data)
{
struct exynos_dp_device *dp = dev_get_drvdata(dev);
analogix_dp_unbind(dp->adp);
dp->encoder.funcs->destroy(&dp->encoder);
}
static const struct component_ops exynos_dp_ops = {
.bind = exynos_dp_bind,
.unbind = exynos_dp_unbind,
};
static int exynos_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np;
struct exynos_dp_device *dp;
struct drm_panel *panel;
struct drm_bridge *bridge;
int ret;
dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
GFP_KERNEL);
if (!dp)
return -ENOMEM;
dp->dev = dev;
/*
* 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 would take charge of the drvdata.
*/
platform_set_drvdata(pdev, dp);
/* This is for the backward compatibility. */
np = of_parse_phandle(dev->of_node, "panel", 0);
if (np) {
dp->plat_data.panel = of_drm_find_panel(np);
of_node_put(np);
if (IS_ERR(dp->plat_data.panel))
return PTR_ERR(dp->plat_data.panel);
goto out;
}
ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
if (ret)
return ret;
/* The remote port can be either a panel or a bridge */
dp->plat_data.panel = panel;
dp->plat_data.dev_type = EXYNOS_DP;
dp->plat_data.power_on_start = exynos_dp_poweron;
dp->plat_data.power_off = exynos_dp_poweroff;
dp->plat_data.attach = exynos_dp_bridge_attach;
dp->plat_data.get_modes = exynos_dp_get_modes;
dp->plat_data.skip_connector = !!bridge;
dp->ptn_bridge = bridge;
out:
dp->adp = analogix_dp_probe(dev, &dp->plat_data);
if (IS_ERR(dp->adp))
return PTR_ERR(dp->adp);
return component_add(&pdev->dev, &exynos_dp_ops);
}
static void exynos_dp_remove(struct platform_device *pdev)
{
struct exynos_dp_device *dp = platform_get_drvdata(pdev);
component_del(&pdev->dev, &exynos_dp_ops);
analogix_dp_remove(dp->adp);
}
static int exynos_dp_suspend(struct device *dev)
{
struct exynos_dp_device *dp = dev_get_drvdata(dev);
return analogix_dp_suspend(dp->adp);
}
static int exynos_dp_resume(struct device *dev)
{
struct exynos_dp_device *dp = dev_get_drvdata(dev);
return analogix_dp_resume(dp->adp);
}
static DEFINE_RUNTIME_DEV_PM_OPS(exynos_dp_pm_ops, exynos_dp_suspend,
exynos_dp_resume, NULL);
static const struct of_device_id exynos_dp_match[] = {
{ .compatible = "samsung,exynos5-dp" },
{},
};
MODULE_DEVICE_TABLE(of, exynos_dp_match);
struct platform_driver dp_driver = {
.probe = exynos_dp_probe,
.remove_new = exynos_dp_remove,
.driver = {
.name = "exynos-dp",
.pm = pm_ptr(&exynos_dp_pm_ops),
.of_match_table = exynos_dp_match,
},
};
MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
MODULE_LICENSE("GPL v2");
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