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