2 * Samsung SoC DP (Display Port) interface driver.
4 * Copyright (C) 2012 Samsung Electronics Co., Ltd.
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 <video/of_display_timing.h>
20 #include <video/of_videomode.h>
21 #include <video/videomode.h>
24 #include <drm/drm_crtc.h>
25 #include <drm/drm_crtc_helper.h>
26 #include <drm/drm_of.h>
27 #include <drm/drm_panel.h>
29 #include <drm/bridge/analogix_dp.h>
30 #include <drm/exynos_drm.h>
32 #include "exynos_drm_crtc.h"
34 #define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
36 struct exynos_dp_device {
37 struct drm_encoder encoder;
38 struct drm_connector *connector;
39 struct drm_bridge *ptn_bridge;
40 struct drm_device *drm_dev;
44 struct analogix_dp_device *adp;
45 struct analogix_dp_plat_data plat_data;
48 static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
51 struct exynos_dp_device *dp = to_dp(plat_data);
52 struct drm_encoder *encoder = &dp->encoder;
57 exynos_drm_pipe_clk_enable(to_exynos_crtc(encoder->crtc), enable);
62 static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
64 return exynos_dp_crtc_clock_enable(plat_data, true);
67 static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
69 return exynos_dp_crtc_clock_enable(plat_data, false);
72 static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
73 struct drm_connector *connector)
75 struct exynos_dp_device *dp = to_dp(plat_data);
76 struct drm_display_mode *mode;
79 if (dp->plat_data.panel)
82 mode = drm_mode_create(connector->dev);
84 DRM_ERROR("failed to create a new display mode.\n");
88 drm_display_mode_from_videomode(&dp->vm, mode);
89 connector->display_info.width_mm = mode->width_mm;
90 connector->display_info.height_mm = mode->height_mm;
92 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
93 drm_mode_set_name(mode);
94 drm_mode_probed_add(connector, mode);
99 static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
100 struct drm_bridge *bridge,
101 struct drm_connector *connector)
103 struct exynos_dp_device *dp = to_dp(plat_data);
106 dp->connector = connector;
108 /* Pre-empt DP connector creation if there's a bridge */
109 if (dp->ptn_bridge) {
110 ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge);
112 DRM_ERROR("Failed to attach bridge to drm\n");
121 static void exynos_dp_mode_set(struct drm_encoder *encoder,
122 struct drm_display_mode *mode,
123 struct drm_display_mode *adjusted_mode)
127 static void exynos_dp_nop(struct drm_encoder *encoder)
132 static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
133 .mode_set = exynos_dp_mode_set,
134 .enable = exynos_dp_nop,
135 .disable = exynos_dp_nop,
138 static const struct drm_encoder_funcs exynos_dp_encoder_funcs = {
139 .destroy = drm_encoder_cleanup,
142 static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
146 ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
148 DRM_ERROR("failed: of_get_videomode() : %d\n", ret);
154 static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
156 struct exynos_dp_device *dp = dev_get_drvdata(dev);
157 struct drm_encoder *encoder = &dp->encoder;
158 struct drm_device *drm_dev = data;
162 dp->drm_dev = drm_dev;
164 dp->plat_data.dev_type = EXYNOS_DP;
165 dp->plat_data.power_on_start = exynos_dp_poweron;
166 dp->plat_data.power_off = exynos_dp_poweroff;
167 dp->plat_data.attach = exynos_dp_bridge_attach;
168 dp->plat_data.get_modes = exynos_dp_get_modes;
170 if (!dp->plat_data.panel && !dp->ptn_bridge) {
171 ret = exynos_dp_dt_parse_panel(dp);
176 drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs,
177 DRM_MODE_ENCODER_TMDS, NULL);
179 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
181 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
185 dp->plat_data.encoder = encoder;
187 dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
188 if (IS_ERR(dp->adp)) {
189 dp->encoder.funcs->destroy(&dp->encoder);
190 return PTR_ERR(dp->adp);
196 static void exynos_dp_unbind(struct device *dev, struct device *master,
199 struct exynos_dp_device *dp = dev_get_drvdata(dev);
201 analogix_dp_unbind(dp->adp);
202 dp->encoder.funcs->destroy(&dp->encoder);
205 static const struct component_ops exynos_dp_ops = {
206 .bind = exynos_dp_bind,
207 .unbind = exynos_dp_unbind,
210 static int exynos_dp_probe(struct platform_device *pdev)
212 struct device *dev = &pdev->dev;
213 struct device_node *np;
214 struct exynos_dp_device *dp;
215 struct drm_panel *panel;
216 struct drm_bridge *bridge;
219 dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
225 * We just use the drvdata until driver run into component
226 * add function, and then we would set drvdata to null, so
227 * that analogix dp driver would take charge of the drvdata.
229 platform_set_drvdata(pdev, dp);
231 /* This is for the backward compatibility. */
232 np = of_parse_phandle(dev->of_node, "panel", 0);
234 dp->plat_data.panel = of_drm_find_panel(np);
236 if (!dp->plat_data.panel)
237 return -EPROBE_DEFER;
241 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
245 /* The remote port can be either a panel or a bridge */
246 dp->plat_data.panel = panel;
247 dp->plat_data.skip_connector = !!bridge;
248 dp->ptn_bridge = bridge;
251 return component_add(&pdev->dev, &exynos_dp_ops);
254 static int exynos_dp_remove(struct platform_device *pdev)
256 component_del(&pdev->dev, &exynos_dp_ops);
262 static int exynos_dp_suspend(struct device *dev)
264 struct exynos_dp_device *dp = dev_get_drvdata(dev);
266 return analogix_dp_suspend(dp->adp);
269 static int exynos_dp_resume(struct device *dev)
271 struct exynos_dp_device *dp = dev_get_drvdata(dev);
273 return analogix_dp_resume(dp->adp);
277 static const struct dev_pm_ops exynos_dp_pm_ops = {
278 SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
281 static const struct of_device_id exynos_dp_match[] = {
282 { .compatible = "samsung,exynos5-dp" },
285 MODULE_DEVICE_TABLE(of, exynos_dp_match);
287 struct platform_driver dp_driver = {
288 .probe = exynos_dp_probe,
289 .remove = exynos_dp_remove,
292 .owner = THIS_MODULE,
293 .pm = &exynos_dp_pm_ops,
294 .of_match_table = exynos_dp_match,
299 MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
300 MODULE_LICENSE("GPL v2");