| /* |
| * Samsung SoC DP (Display Port) interface driver. |
| * |
| * Copyright (C) 2012 Samsung Electronics Co., Ltd. |
| * Author: Jingoo Han <jg1.han@samsung.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/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/err.h> |
| #include <linux/clk.h> |
| #include <linux/of_graph.h> |
| #include <linux/component.h> |
| #include <video/of_display_timing.h> |
| #include <video/of_videomode.h> |
| #include <video/videomode.h> |
| |
| #include <drm/drmP.h> |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_of.h> |
| #include <drm/drm_panel.h> |
| |
| #include <drm/bridge/analogix_dp.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; |
| int num_modes = 0; |
| |
| if (dp->plat_data.panel) |
| return num_modes; |
| |
| mode = drm_mode_create(connector->dev); |
| if (!mode) { |
| DRM_ERROR("failed to create a new display mode.\n"); |
| return num_modes; |
| } |
| |
| 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 num_modes + 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); |
| if (ret) { |
| DRM_ERROR("Failed to attach bridge to drm\n"); |
| bridge->next = NULL; |
| 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 const struct drm_encoder_funcs exynos_dp_encoder_funcs = { |
| .destroy = drm_encoder_cleanup, |
| }; |
| |
| 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_ERROR("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->dev = dev; |
| dp->drm_dev = drm_dev; |
| |
| 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; |
| |
| if (!dp->plat_data.panel && !dp->ptn_bridge) { |
| ret = exynos_dp_dt_parse_panel(dp); |
| if (ret) |
| return ret; |
| } |
| |
| drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs, |
| DRM_MODE_ENCODER_TMDS, NULL); |
| |
| 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; |
| |
| dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data); |
| if (IS_ERR(dp->adp)) { |
| dp->encoder.funcs->destroy(&dp->encoder); |
| return PTR_ERR(dp->adp); |
| } |
| |
| return 0; |
| } |
| |
| 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; |
| |
| /* |
| * 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 (!dp->plat_data.panel) |
| return -EPROBE_DEFER; |
| 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.skip_connector = !!bridge; |
| dp->ptn_bridge = bridge; |
| |
| out: |
| return component_add(&pdev->dev, &exynos_dp_ops); |
| } |
| |
| static int exynos_dp_remove(struct platform_device *pdev) |
| { |
| component_del(&pdev->dev, &exynos_dp_ops); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| 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); |
| } |
| #endif |
| |
| static const struct dev_pm_ops exynos_dp_pm_ops = { |
| SET_RUNTIME_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 = exynos_dp_remove, |
| .driver = { |
| .name = "exynos-dp", |
| .owner = THIS_MODULE, |
| .pm = &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"); |