18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later
28c2ecf20Sopenharmony_ci/*
38c2ecf20Sopenharmony_ci * Samsung SoC DP (Display Port) interface driver.
48c2ecf20Sopenharmony_ci *
58c2ecf20Sopenharmony_ci * Copyright (C) 2012 Samsung Electronics Co., Ltd.
68c2ecf20Sopenharmony_ci * Author: Jingoo Han <jg1.han@samsung.com>
78c2ecf20Sopenharmony_ci */
88c2ecf20Sopenharmony_ci
98c2ecf20Sopenharmony_ci#include <linux/clk.h>
108c2ecf20Sopenharmony_ci#include <linux/component.h>
118c2ecf20Sopenharmony_ci#include <linux/err.h>
128c2ecf20Sopenharmony_ci#include <linux/module.h>
138c2ecf20Sopenharmony_ci#include <linux/of_graph.h>
148c2ecf20Sopenharmony_ci#include <linux/platform_device.h>
158c2ecf20Sopenharmony_ci#include <linux/pm_runtime.h>
168c2ecf20Sopenharmony_ci#include <video/of_display_timing.h>
178c2ecf20Sopenharmony_ci#include <video/of_videomode.h>
188c2ecf20Sopenharmony_ci#include <video/videomode.h>
198c2ecf20Sopenharmony_ci
208c2ecf20Sopenharmony_ci#include <drm/bridge/analogix_dp.h>
218c2ecf20Sopenharmony_ci#include <drm/drm_atomic_helper.h>
228c2ecf20Sopenharmony_ci#include <drm/drm_bridge.h>
238c2ecf20Sopenharmony_ci#include <drm/drm_crtc.h>
248c2ecf20Sopenharmony_ci#include <drm/drm_of.h>
258c2ecf20Sopenharmony_ci#include <drm/drm_panel.h>
268c2ecf20Sopenharmony_ci#include <drm/drm_print.h>
278c2ecf20Sopenharmony_ci#include <drm/drm_probe_helper.h>
288c2ecf20Sopenharmony_ci#include <drm/drm_simple_kms_helper.h>
298c2ecf20Sopenharmony_ci#include <drm/exynos_drm.h>
308c2ecf20Sopenharmony_ci
318c2ecf20Sopenharmony_ci#include "exynos_drm_crtc.h"
328c2ecf20Sopenharmony_ci
338c2ecf20Sopenharmony_ci#define to_dp(nm)	container_of(nm, struct exynos_dp_device, nm)
348c2ecf20Sopenharmony_ci
358c2ecf20Sopenharmony_cistruct exynos_dp_device {
368c2ecf20Sopenharmony_ci	struct drm_encoder         encoder;
378c2ecf20Sopenharmony_ci	struct drm_connector       *connector;
388c2ecf20Sopenharmony_ci	struct drm_bridge          *ptn_bridge;
398c2ecf20Sopenharmony_ci	struct drm_device          *drm_dev;
408c2ecf20Sopenharmony_ci	struct device              *dev;
418c2ecf20Sopenharmony_ci
428c2ecf20Sopenharmony_ci	struct videomode           vm;
438c2ecf20Sopenharmony_ci	struct analogix_dp_device *adp;
448c2ecf20Sopenharmony_ci	struct analogix_dp_plat_data plat_data;
458c2ecf20Sopenharmony_ci};
468c2ecf20Sopenharmony_ci
478c2ecf20Sopenharmony_cistatic int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
488c2ecf20Sopenharmony_ci				bool enable)
498c2ecf20Sopenharmony_ci{
508c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp = to_dp(plat_data);
518c2ecf20Sopenharmony_ci	struct drm_encoder *encoder = &dp->encoder;
528c2ecf20Sopenharmony_ci
538c2ecf20Sopenharmony_ci	if (!encoder->crtc)
548c2ecf20Sopenharmony_ci		return -EPERM;
558c2ecf20Sopenharmony_ci
568c2ecf20Sopenharmony_ci	exynos_drm_pipe_clk_enable(to_exynos_crtc(encoder->crtc), enable);
578c2ecf20Sopenharmony_ci
588c2ecf20Sopenharmony_ci	return 0;
598c2ecf20Sopenharmony_ci}
608c2ecf20Sopenharmony_ci
618c2ecf20Sopenharmony_cistatic int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
628c2ecf20Sopenharmony_ci{
638c2ecf20Sopenharmony_ci	return exynos_dp_crtc_clock_enable(plat_data, true);
648c2ecf20Sopenharmony_ci}
658c2ecf20Sopenharmony_ci
668c2ecf20Sopenharmony_cistatic int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
678c2ecf20Sopenharmony_ci{
688c2ecf20Sopenharmony_ci	return exynos_dp_crtc_clock_enable(plat_data, false);
698c2ecf20Sopenharmony_ci}
708c2ecf20Sopenharmony_ci
718c2ecf20Sopenharmony_cistatic int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
728c2ecf20Sopenharmony_ci			       struct drm_connector *connector)
738c2ecf20Sopenharmony_ci{
748c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp = to_dp(plat_data);
758c2ecf20Sopenharmony_ci	struct drm_display_mode *mode;
768c2ecf20Sopenharmony_ci	int num_modes = 0;
778c2ecf20Sopenharmony_ci
788c2ecf20Sopenharmony_ci	if (dp->plat_data.panel)
798c2ecf20Sopenharmony_ci		return num_modes;
808c2ecf20Sopenharmony_ci
818c2ecf20Sopenharmony_ci	mode = drm_mode_create(connector->dev);
828c2ecf20Sopenharmony_ci	if (!mode) {
838c2ecf20Sopenharmony_ci		DRM_DEV_ERROR(dp->dev,
848c2ecf20Sopenharmony_ci			      "failed to create a new display mode.\n");
858c2ecf20Sopenharmony_ci		return num_modes;
868c2ecf20Sopenharmony_ci	}
878c2ecf20Sopenharmony_ci
888c2ecf20Sopenharmony_ci	drm_display_mode_from_videomode(&dp->vm, mode);
898c2ecf20Sopenharmony_ci	connector->display_info.width_mm = mode->width_mm;
908c2ecf20Sopenharmony_ci	connector->display_info.height_mm = mode->height_mm;
918c2ecf20Sopenharmony_ci
928c2ecf20Sopenharmony_ci	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
938c2ecf20Sopenharmony_ci	drm_mode_set_name(mode);
948c2ecf20Sopenharmony_ci	drm_mode_probed_add(connector, mode);
958c2ecf20Sopenharmony_ci
968c2ecf20Sopenharmony_ci	return num_modes + 1;
978c2ecf20Sopenharmony_ci}
988c2ecf20Sopenharmony_ci
998c2ecf20Sopenharmony_cistatic int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
1008c2ecf20Sopenharmony_ci				   struct drm_bridge *bridge,
1018c2ecf20Sopenharmony_ci				   struct drm_connector *connector)
1028c2ecf20Sopenharmony_ci{
1038c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp = to_dp(plat_data);
1048c2ecf20Sopenharmony_ci	int ret;
1058c2ecf20Sopenharmony_ci
1068c2ecf20Sopenharmony_ci	dp->connector = connector;
1078c2ecf20Sopenharmony_ci
1088c2ecf20Sopenharmony_ci	/* Pre-empt DP connector creation if there's a bridge */
1098c2ecf20Sopenharmony_ci	if (dp->ptn_bridge) {
1108c2ecf20Sopenharmony_ci		ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge,
1118c2ecf20Sopenharmony_ci					0);
1128c2ecf20Sopenharmony_ci		if (ret) {
1138c2ecf20Sopenharmony_ci			DRM_DEV_ERROR(dp->dev,
1148c2ecf20Sopenharmony_ci				      "Failed to attach bridge to drm\n");
1158c2ecf20Sopenharmony_ci			return ret;
1168c2ecf20Sopenharmony_ci		}
1178c2ecf20Sopenharmony_ci	}
1188c2ecf20Sopenharmony_ci
1198c2ecf20Sopenharmony_ci	return 0;
1208c2ecf20Sopenharmony_ci}
1218c2ecf20Sopenharmony_ci
1228c2ecf20Sopenharmony_cistatic void exynos_dp_mode_set(struct drm_encoder *encoder,
1238c2ecf20Sopenharmony_ci			       struct drm_display_mode *mode,
1248c2ecf20Sopenharmony_ci			       struct drm_display_mode *adjusted_mode)
1258c2ecf20Sopenharmony_ci{
1268c2ecf20Sopenharmony_ci}
1278c2ecf20Sopenharmony_ci
1288c2ecf20Sopenharmony_cistatic void exynos_dp_nop(struct drm_encoder *encoder)
1298c2ecf20Sopenharmony_ci{
1308c2ecf20Sopenharmony_ci	/* do nothing */
1318c2ecf20Sopenharmony_ci}
1328c2ecf20Sopenharmony_ci
1338c2ecf20Sopenharmony_cistatic const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
1348c2ecf20Sopenharmony_ci	.mode_set = exynos_dp_mode_set,
1358c2ecf20Sopenharmony_ci	.enable = exynos_dp_nop,
1368c2ecf20Sopenharmony_ci	.disable = exynos_dp_nop,
1378c2ecf20Sopenharmony_ci};
1388c2ecf20Sopenharmony_ci
1398c2ecf20Sopenharmony_cistatic int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
1408c2ecf20Sopenharmony_ci{
1418c2ecf20Sopenharmony_ci	int ret;
1428c2ecf20Sopenharmony_ci
1438c2ecf20Sopenharmony_ci	ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
1448c2ecf20Sopenharmony_ci	if (ret) {
1458c2ecf20Sopenharmony_ci		DRM_DEV_ERROR(dp->dev,
1468c2ecf20Sopenharmony_ci			      "failed: of_get_videomode() : %d\n", ret);
1478c2ecf20Sopenharmony_ci		return ret;
1488c2ecf20Sopenharmony_ci	}
1498c2ecf20Sopenharmony_ci	return 0;
1508c2ecf20Sopenharmony_ci}
1518c2ecf20Sopenharmony_ci
1528c2ecf20Sopenharmony_cistatic int exynos_dp_bind(struct device *dev, struct device *master, void *data)
1538c2ecf20Sopenharmony_ci{
1548c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp = dev_get_drvdata(dev);
1558c2ecf20Sopenharmony_ci	struct drm_encoder *encoder = &dp->encoder;
1568c2ecf20Sopenharmony_ci	struct drm_device *drm_dev = data;
1578c2ecf20Sopenharmony_ci	int ret;
1588c2ecf20Sopenharmony_ci
1598c2ecf20Sopenharmony_ci	dp->drm_dev = drm_dev;
1608c2ecf20Sopenharmony_ci
1618c2ecf20Sopenharmony_ci	if (!dp->plat_data.panel && !dp->ptn_bridge) {
1628c2ecf20Sopenharmony_ci		ret = exynos_dp_dt_parse_panel(dp);
1638c2ecf20Sopenharmony_ci		if (ret)
1648c2ecf20Sopenharmony_ci			return ret;
1658c2ecf20Sopenharmony_ci	}
1668c2ecf20Sopenharmony_ci
1678c2ecf20Sopenharmony_ci	drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
1688c2ecf20Sopenharmony_ci
1698c2ecf20Sopenharmony_ci	drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
1708c2ecf20Sopenharmony_ci
1718c2ecf20Sopenharmony_ci	ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
1728c2ecf20Sopenharmony_ci	if (ret < 0)
1738c2ecf20Sopenharmony_ci		return ret;
1748c2ecf20Sopenharmony_ci
1758c2ecf20Sopenharmony_ci	dp->plat_data.encoder = encoder;
1768c2ecf20Sopenharmony_ci
1778c2ecf20Sopenharmony_ci	ret = analogix_dp_bind(dp->adp, dp->drm_dev);
1788c2ecf20Sopenharmony_ci	if (ret)
1798c2ecf20Sopenharmony_ci		dp->encoder.funcs->destroy(&dp->encoder);
1808c2ecf20Sopenharmony_ci
1818c2ecf20Sopenharmony_ci	return ret;
1828c2ecf20Sopenharmony_ci}
1838c2ecf20Sopenharmony_ci
1848c2ecf20Sopenharmony_cistatic void exynos_dp_unbind(struct device *dev, struct device *master,
1858c2ecf20Sopenharmony_ci			     void *data)
1868c2ecf20Sopenharmony_ci{
1878c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp = dev_get_drvdata(dev);
1888c2ecf20Sopenharmony_ci
1898c2ecf20Sopenharmony_ci	analogix_dp_unbind(dp->adp);
1908c2ecf20Sopenharmony_ci	dp->encoder.funcs->destroy(&dp->encoder);
1918c2ecf20Sopenharmony_ci}
1928c2ecf20Sopenharmony_ci
1938c2ecf20Sopenharmony_cistatic const struct component_ops exynos_dp_ops = {
1948c2ecf20Sopenharmony_ci	.bind	= exynos_dp_bind,
1958c2ecf20Sopenharmony_ci	.unbind	= exynos_dp_unbind,
1968c2ecf20Sopenharmony_ci};
1978c2ecf20Sopenharmony_ci
1988c2ecf20Sopenharmony_cistatic int exynos_dp_probe(struct platform_device *pdev)
1998c2ecf20Sopenharmony_ci{
2008c2ecf20Sopenharmony_ci	struct device *dev = &pdev->dev;
2018c2ecf20Sopenharmony_ci	struct device_node *np;
2028c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp;
2038c2ecf20Sopenharmony_ci	struct drm_panel *panel;
2048c2ecf20Sopenharmony_ci	struct drm_bridge *bridge;
2058c2ecf20Sopenharmony_ci	int ret;
2068c2ecf20Sopenharmony_ci
2078c2ecf20Sopenharmony_ci	dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
2088c2ecf20Sopenharmony_ci			  GFP_KERNEL);
2098c2ecf20Sopenharmony_ci	if (!dp)
2108c2ecf20Sopenharmony_ci		return -ENOMEM;
2118c2ecf20Sopenharmony_ci
2128c2ecf20Sopenharmony_ci	dp->dev = dev;
2138c2ecf20Sopenharmony_ci	/*
2148c2ecf20Sopenharmony_ci	 * We just use the drvdata until driver run into component
2158c2ecf20Sopenharmony_ci	 * add function, and then we would set drvdata to null, so
2168c2ecf20Sopenharmony_ci	 * that analogix dp driver would take charge of the drvdata.
2178c2ecf20Sopenharmony_ci	 */
2188c2ecf20Sopenharmony_ci	platform_set_drvdata(pdev, dp);
2198c2ecf20Sopenharmony_ci
2208c2ecf20Sopenharmony_ci	/* This is for the backward compatibility. */
2218c2ecf20Sopenharmony_ci	np = of_parse_phandle(dev->of_node, "panel", 0);
2228c2ecf20Sopenharmony_ci	if (np) {
2238c2ecf20Sopenharmony_ci		dp->plat_data.panel = of_drm_find_panel(np);
2248c2ecf20Sopenharmony_ci
2258c2ecf20Sopenharmony_ci		of_node_put(np);
2268c2ecf20Sopenharmony_ci		if (IS_ERR(dp->plat_data.panel))
2278c2ecf20Sopenharmony_ci			return PTR_ERR(dp->plat_data.panel);
2288c2ecf20Sopenharmony_ci
2298c2ecf20Sopenharmony_ci		goto out;
2308c2ecf20Sopenharmony_ci	}
2318c2ecf20Sopenharmony_ci
2328c2ecf20Sopenharmony_ci	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
2338c2ecf20Sopenharmony_ci	if (ret)
2348c2ecf20Sopenharmony_ci		return ret;
2358c2ecf20Sopenharmony_ci
2368c2ecf20Sopenharmony_ci	/* The remote port can be either a panel or a bridge */
2378c2ecf20Sopenharmony_ci	dp->plat_data.panel = panel;
2388c2ecf20Sopenharmony_ci	dp->plat_data.dev_type = EXYNOS_DP;
2398c2ecf20Sopenharmony_ci	dp->plat_data.power_on_start = exynos_dp_poweron;
2408c2ecf20Sopenharmony_ci	dp->plat_data.power_off = exynos_dp_poweroff;
2418c2ecf20Sopenharmony_ci	dp->plat_data.attach = exynos_dp_bridge_attach;
2428c2ecf20Sopenharmony_ci	dp->plat_data.get_modes = exynos_dp_get_modes;
2438c2ecf20Sopenharmony_ci	dp->plat_data.skip_connector = !!bridge;
2448c2ecf20Sopenharmony_ci
2458c2ecf20Sopenharmony_ci	dp->ptn_bridge = bridge;
2468c2ecf20Sopenharmony_ci
2478c2ecf20Sopenharmony_ciout:
2488c2ecf20Sopenharmony_ci	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
2498c2ecf20Sopenharmony_ci	if (IS_ERR(dp->adp))
2508c2ecf20Sopenharmony_ci		return PTR_ERR(dp->adp);
2518c2ecf20Sopenharmony_ci
2528c2ecf20Sopenharmony_ci	return component_add(&pdev->dev, &exynos_dp_ops);
2538c2ecf20Sopenharmony_ci}
2548c2ecf20Sopenharmony_ci
2558c2ecf20Sopenharmony_cistatic int exynos_dp_remove(struct platform_device *pdev)
2568c2ecf20Sopenharmony_ci{
2578c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp = platform_get_drvdata(pdev);
2588c2ecf20Sopenharmony_ci
2598c2ecf20Sopenharmony_ci	component_del(&pdev->dev, &exynos_dp_ops);
2608c2ecf20Sopenharmony_ci	analogix_dp_remove(dp->adp);
2618c2ecf20Sopenharmony_ci
2628c2ecf20Sopenharmony_ci	return 0;
2638c2ecf20Sopenharmony_ci}
2648c2ecf20Sopenharmony_ci
2658c2ecf20Sopenharmony_ci#ifdef CONFIG_PM
2668c2ecf20Sopenharmony_cistatic int exynos_dp_suspend(struct device *dev)
2678c2ecf20Sopenharmony_ci{
2688c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp = dev_get_drvdata(dev);
2698c2ecf20Sopenharmony_ci
2708c2ecf20Sopenharmony_ci	return analogix_dp_suspend(dp->adp);
2718c2ecf20Sopenharmony_ci}
2728c2ecf20Sopenharmony_ci
2738c2ecf20Sopenharmony_cistatic int exynos_dp_resume(struct device *dev)
2748c2ecf20Sopenharmony_ci{
2758c2ecf20Sopenharmony_ci	struct exynos_dp_device *dp = dev_get_drvdata(dev);
2768c2ecf20Sopenharmony_ci
2778c2ecf20Sopenharmony_ci	return analogix_dp_resume(dp->adp);
2788c2ecf20Sopenharmony_ci}
2798c2ecf20Sopenharmony_ci#endif
2808c2ecf20Sopenharmony_ci
2818c2ecf20Sopenharmony_cistatic const struct dev_pm_ops exynos_dp_pm_ops = {
2828c2ecf20Sopenharmony_ci	SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
2838c2ecf20Sopenharmony_ci	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
2848c2ecf20Sopenharmony_ci				pm_runtime_force_resume)
2858c2ecf20Sopenharmony_ci};
2868c2ecf20Sopenharmony_ci
2878c2ecf20Sopenharmony_cistatic const struct of_device_id exynos_dp_match[] = {
2888c2ecf20Sopenharmony_ci	{ .compatible = "samsung,exynos5-dp" },
2898c2ecf20Sopenharmony_ci	{},
2908c2ecf20Sopenharmony_ci};
2918c2ecf20Sopenharmony_ciMODULE_DEVICE_TABLE(of, exynos_dp_match);
2928c2ecf20Sopenharmony_ci
2938c2ecf20Sopenharmony_cistruct platform_driver dp_driver = {
2948c2ecf20Sopenharmony_ci	.probe		= exynos_dp_probe,
2958c2ecf20Sopenharmony_ci	.remove		= exynos_dp_remove,
2968c2ecf20Sopenharmony_ci	.driver		= {
2978c2ecf20Sopenharmony_ci		.name	= "exynos-dp",
2988c2ecf20Sopenharmony_ci		.owner	= THIS_MODULE,
2998c2ecf20Sopenharmony_ci		.pm	= &exynos_dp_pm_ops,
3008c2ecf20Sopenharmony_ci		.of_match_table = exynos_dp_match,
3018c2ecf20Sopenharmony_ci	},
3028c2ecf20Sopenharmony_ci};
3038c2ecf20Sopenharmony_ci
3048c2ecf20Sopenharmony_ciMODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
3058c2ecf20Sopenharmony_ciMODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
3068c2ecf20Sopenharmony_ciMODULE_LICENSE("GPL v2");
307