2 * Samsung SoC DP (Display Port) interface driver.
4 * Copyright (C) 2012 Samsung Electronics Co., Ltd.
5 * Author: Jingoo Han <jg1.han@samsung.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/err.h>
16 #include <linux/clk.h>
17 #include <linux/of_graph.h>
18 #include <linux/component.h>
19 #include <linux/pm_runtime.h>
20 #include <video/of_display_timing.h>
21 #include <video/of_videomode.h>
22 #include <video/videomode.h>
25 #include <drm/drm_atomic_helper.h>
26 #include <drm/drm_crtc.h>
27 #include <drm/drm_of.h>
28 #include <drm/drm_panel.h>
29 #include <drm/drm_probe_helper.h>
31 #include <drm/bridge/analogix_dp.h>
32 #include <drm/exynos_drm.h>
34 #include "exynos_drm_crtc.h"
36 #define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
38 struct exynos_dp_device {
39 struct drm_encoder encoder;
40 struct drm_connector *connector;
41 struct drm_bridge *ptn_bridge;
42 struct drm_device *drm_dev;
46 struct analogix_dp_device *adp;
47 struct analogix_dp_plat_data plat_data;
50 static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
53 struct exynos_dp_device *dp = to_dp(plat_data);
54 struct drm_encoder *encoder = &dp->encoder;
59 exynos_drm_pipe_clk_enable(to_exynos_crtc(encoder->crtc), enable);
64 static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
66 return exynos_dp_crtc_clock_enable(plat_data, true);
69 static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
71 return exynos_dp_crtc_clock_enable(plat_data, false);
74 static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
75 struct drm_connector *connector)
77 struct exynos_dp_device *dp = to_dp(plat_data);
78 struct drm_display_mode *mode;
81 if (dp->plat_data.panel)
84 mode = drm_mode_create(connector->dev);
86 DRM_DEV_ERROR(dp->dev,
87 "failed to create a new display mode.\n");
91 drm_display_mode_from_videomode(&dp->vm, mode);
92 connector->display_info.width_mm = mode->width_mm;
93 connector->display_info.height_mm = mode->height_mm;
95 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
96 drm_mode_set_name(mode);
97 drm_mode_probed_add(connector, mode);
102 static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
103 struct drm_bridge *bridge,
104 struct drm_connector *connector)
106 struct exynos_dp_device *dp = to_dp(plat_data);
109 dp->connector = connector;
111 /* Pre-empt DP connector creation if there's a bridge */
112 if (dp->ptn_bridge) {
113 ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge);
115 DRM_DEV_ERROR(dp->dev,
116 "Failed to attach bridge to drm\n");
125 static void exynos_dp_mode_set(struct drm_encoder *encoder,
126 struct drm_display_mode *mode,
127 struct drm_display_mode *adjusted_mode)
131 static void exynos_dp_nop(struct drm_encoder *encoder)
136 static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
137 .mode_set = exynos_dp_mode_set,
138 .enable = exynos_dp_nop,
139 .disable = exynos_dp_nop,
142 static const struct drm_encoder_funcs exynos_dp_encoder_funcs = {
143 .destroy = drm_encoder_cleanup,
146 static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
150 ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
152 DRM_DEV_ERROR(dp->dev,
153 "failed: of_get_videomode() : %d\n", ret);
159 static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
161 struct exynos_dp_device *dp = dev_get_drvdata(dev);
162 struct drm_encoder *encoder = &dp->encoder;
163 struct drm_device *drm_dev = data;
167 dp->drm_dev = drm_dev;
169 dp->plat_data.dev_type = EXYNOS_DP;
170 dp->plat_data.power_on_start = exynos_dp_poweron;
171 dp->plat_data.power_off = exynos_dp_poweroff;
172 dp->plat_data.attach = exynos_dp_bridge_attach;
173 dp->plat_data.get_modes = exynos_dp_get_modes;
175 if (!dp->plat_data.panel && !dp->ptn_bridge) {
176 ret = exynos_dp_dt_parse_panel(dp);
181 drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs,
182 DRM_MODE_ENCODER_TMDS, NULL);
184 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
186 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
190 dp->plat_data.encoder = encoder;
192 dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
193 if (IS_ERR(dp->adp)) {
194 dp->encoder.funcs->destroy(&dp->encoder);
195 return PTR_ERR(dp->adp);
201 static void exynos_dp_unbind(struct device *dev, struct device *master,
204 struct exynos_dp_device *dp = dev_get_drvdata(dev);
206 analogix_dp_unbind(dp->adp);
207 dp->encoder.funcs->destroy(&dp->encoder);
210 static const struct component_ops exynos_dp_ops = {
211 .bind = exynos_dp_bind,
212 .unbind = exynos_dp_unbind,
215 static int exynos_dp_probe(struct platform_device *pdev)
217 struct device *dev = &pdev->dev;
218 struct device_node *np;
219 struct exynos_dp_device *dp;
220 struct drm_panel *panel;
221 struct drm_bridge *bridge;
224 dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
230 * We just use the drvdata until driver run into component
231 * add function, and then we would set drvdata to null, so
232 * that analogix dp driver would take charge of the drvdata.
234 platform_set_drvdata(pdev, dp);
236 /* This is for the backward compatibility. */
237 np = of_parse_phandle(dev->of_node, "panel", 0);
239 dp->plat_data.panel = of_drm_find_panel(np);
242 if (IS_ERR(dp->plat_data.panel))
243 return PTR_ERR(dp->plat_data.panel);
248 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
252 /* The remote port can be either a panel or a bridge */
253 dp->plat_data.panel = panel;
254 dp->plat_data.skip_connector = !!bridge;
255 dp->ptn_bridge = bridge;
258 return component_add(&pdev->dev, &exynos_dp_ops);
261 static int exynos_dp_remove(struct platform_device *pdev)
263 component_del(&pdev->dev, &exynos_dp_ops);
269 static int exynos_dp_suspend(struct device *dev)
271 struct exynos_dp_device *dp = dev_get_drvdata(dev);
273 return analogix_dp_suspend(dp->adp);
276 static int exynos_dp_resume(struct device *dev)
278 struct exynos_dp_device *dp = dev_get_drvdata(dev);
280 return analogix_dp_resume(dp->adp);
284 static const struct dev_pm_ops exynos_dp_pm_ops = {
285 SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
286 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
287 pm_runtime_force_resume)
290 static const struct of_device_id exynos_dp_match[] = {
291 { .compatible = "samsung,exynos5-dp" },
294 MODULE_DEVICE_TABLE(of, exynos_dp_match);
296 struct platform_driver dp_driver = {
297 .probe = exynos_dp_probe,
298 .remove = exynos_dp_remove,
301 .owner = THIS_MODULE,
302 .pm = &exynos_dp_pm_ops,
303 .of_match_table = exynos_dp_match,
307 MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
308 MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
309 MODULE_LICENSE("GPL v2");