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