diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-11 04:34:46 -0300 |
commit | 863981e96738983919de841ec669e157e6bdaeb0 (patch) | |
tree | d6d89a12e7eb8017837c057935a2271290907f76 /drivers/gpu/drm/exynos/exynos_dp.c | |
parent | 8dec7c70575785729a6a9e6719a955e9c545bcab (diff) |
Linux-libre 4.7.1-gnupck-4.7.1-gnu
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_dp.c')
-rw-r--r-- | drivers/gpu/drm/exynos/exynos_dp.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c new file mode 100644 index 000000000..4c1fb3f8b --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_dp.c @@ -0,0 +1,312 @@ +/* + * 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_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_plat_data plat_data; +}; + +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 exynos_dp_device *dp = to_dp(plat_data); + struct drm_connector *connector = dp->connector; + 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); + struct drm_encoder *encoder = &dp->encoder; + int ret; + + drm_connector_register(connector); + dp->connector = connector; + + /* Pre-empt DP connector creation if there's a bridge */ + if (dp->ptn_bridge) { + bridge->next = dp->ptn_bridge; + dp->ptn_bridge->encoder = encoder; + ret = drm_bridge_attach(encoder->dev, dp->ptn_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 pipe, 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); + + dp->dev = dev; + dp->drm_dev = drm_dev; + + dp->plat_data.dev_type = EXYNOS_DP; + dp->plat_data.power_on = 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; + } + + pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev, + EXYNOS_DISPLAY_TYPE_LCD); + if (pipe < 0) + return pipe; + + encoder->possible_crtcs = 1 << pipe; + + DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); + + 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); + + dp->plat_data.encoder = encoder; + + return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data); +} + +static void exynos_dp_unbind(struct device *dev, struct device *master, + void *data) +{ + return analogix_dp_unbind(dev, master, data); +} + +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 = NULL, *endpoint = NULL; + struct exynos_dp_device *dp; + + 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; + } + + endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); + if (endpoint) { + np = of_graph_get_remote_port_parent(endpoint); + if (np) { + /* The remote port can be either a panel or a bridge */ + dp->plat_data.panel = of_drm_find_panel(np); + if (!dp->plat_data.panel) { + dp->ptn_bridge = of_drm_find_bridge(np); + if (!dp->ptn_bridge) { + of_node_put(np); + return -EPROBE_DEFER; + } + } + of_node_put(np); + } else { + DRM_ERROR("no remote endpoint device node found.\n"); + return -EINVAL; + } + } else { + DRM_ERROR("no port endpoint subnode found.\n"); + return -EINVAL; + } + +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) +{ + return analogix_dp_suspend(dev); +} + +static int exynos_dp_resume(struct device *dev) +{ + return analogix_dp_resume(dev); +} +#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"); |