diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_dp.c')
-rw-r--r-- | drivers/gpu/drm/exynos/exynos_dp.c | 299 |
1 files changed, 299 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 0000000000..3404ec1367 --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_dp.c @@ -0,0 +1,299 @@ +// 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; + int num_modes = 0; + + if (dp->plat_data.panel) + return num_modes; + + mode = drm_mode_create(connector->dev); + if (!mode) { + DRM_DEV_ERROR(dp->dev, + "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, + 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 int 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); + + return 0; +} + +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 = exynos_dp_remove, + .driver = { + .name = "exynos-dp", + .owner = THIS_MODULE, + .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"); |