1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Samsung SoC DP (Display Port) interface driver.
5 * Copyright (C) 2012 Samsung Electronics Co., Ltd.
6 * Author: Jingoo Han <jg1.han@samsung.com>
10 #include <linux/component.h>
11 #include <linux/err.h>
12 #include <linux/module.h>
13 #include <linux/of_graph.h>
14 #include <linux/platform_device.h>
15 #include <linux/pm_runtime.h>
16 #include <video/of_display_timing.h>
17 #include <video/of_videomode.h>
18 #include <video/videomode.h>
20 #include <drm/bridge/analogix_dp.h>
21 #include <drm/drm_atomic_helper.h>
22 #include <drm/drm_bridge.h>
23 #include <drm/drm_crtc.h>
24 #include <drm/drm_of.h>
25 #include <drm/drm_panel.h>
26 #include <drm/drm_print.h>
27 #include <drm/drm_probe_helper.h>
28 #include <drm/drm_simple_kms_helper.h>
29 #include <drm/exynos_drm.h>
31 #include "exynos_drm_crtc.h"
33 #define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
35 struct exynos_dp_device {
36 struct drm_encoder encoder;
37 struct drm_connector *connector;
38 struct drm_bridge *ptn_bridge;
39 struct drm_device *drm_dev;
43 struct analogix_dp_device *adp;
44 struct analogix_dp_plat_data plat_data;
47 static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
50 struct exynos_dp_device *dp = to_dp(plat_data);
51 struct drm_encoder *encoder = &dp->encoder;
56 exynos_drm_pipe_clk_enable(to_exynos_crtc(encoder->crtc), enable);
61 static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
63 return exynos_dp_crtc_clock_enable(plat_data, true);
66 static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
68 return exynos_dp_crtc_clock_enable(plat_data, false);
71 static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
72 struct drm_connector *connector)
74 struct exynos_dp_device *dp = to_dp(plat_data);
75 struct drm_display_mode *mode;
78 if (dp->plat_data.panel)
81 mode = drm_mode_create(connector->dev);
83 DRM_DEV_ERROR(dp->dev,
84 "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,
119 static void exynos_dp_mode_set(struct drm_encoder *encoder,
120 struct drm_display_mode *mode,
121 struct drm_display_mode *adjusted_mode)
125 static void exynos_dp_nop(struct drm_encoder *encoder)
130 static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
131 .mode_set = exynos_dp_mode_set,
132 .enable = exynos_dp_nop,
133 .disable = exynos_dp_nop,
136 static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
140 ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
142 DRM_DEV_ERROR(dp->dev,
143 "failed: of_get_videomode() : %d\n", ret);
149 static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
151 struct exynos_dp_device *dp = dev_get_drvdata(dev);
152 struct drm_encoder *encoder = &dp->encoder;
153 struct drm_device *drm_dev = data;
156 dp->drm_dev = drm_dev;
158 if (!dp->plat_data.panel && !dp->ptn_bridge) {
159 ret = exynos_dp_dt_parse_panel(dp);
164 drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
166 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
168 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
172 dp->plat_data.encoder = encoder;
174 ret = analogix_dp_bind(dp->adp, dp->drm_dev);
176 dp->encoder.funcs->destroy(&dp->encoder);
181 static void exynos_dp_unbind(struct device *dev, struct device *master,
184 struct exynos_dp_device *dp = dev_get_drvdata(dev);
186 analogix_dp_unbind(dp->adp);
187 dp->encoder.funcs->destroy(&dp->encoder);
190 static const struct component_ops exynos_dp_ops = {
191 .bind = exynos_dp_bind,
192 .unbind = exynos_dp_unbind,
195 static int exynos_dp_probe(struct platform_device *pdev)
197 struct device *dev = &pdev->dev;
198 struct device_node *np;
199 struct exynos_dp_device *dp;
200 struct drm_panel *panel;
201 struct drm_bridge *bridge;
204 dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
211 * We just use the drvdata until driver run into component
212 * add function, and then we would set drvdata to null, so
213 * that analogix dp driver would take charge of the drvdata.
215 platform_set_drvdata(pdev, dp);
217 /* This is for the backward compatibility. */
218 np = of_parse_phandle(dev->of_node, "panel", 0);
220 dp->plat_data.panel = of_drm_find_panel(np);
223 if (IS_ERR(dp->plat_data.panel))
224 return PTR_ERR(dp->plat_data.panel);
229 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
233 /* The remote port can be either a panel or a bridge */
234 dp->plat_data.panel = panel;
235 dp->plat_data.dev_type = EXYNOS_DP;
236 dp->plat_data.power_on_start = exynos_dp_poweron;
237 dp->plat_data.power_off = exynos_dp_poweroff;
238 dp->plat_data.attach = exynos_dp_bridge_attach;
239 dp->plat_data.get_modes = exynos_dp_get_modes;
240 dp->plat_data.skip_connector = !!bridge;
242 dp->ptn_bridge = bridge;
245 dp->adp = analogix_dp_probe(dev, &dp->plat_data);
247 return PTR_ERR(dp->adp);
249 return component_add(&pdev->dev, &exynos_dp_ops);
252 static int exynos_dp_remove(struct platform_device *pdev)
254 struct exynos_dp_device *dp = platform_get_drvdata(pdev);
256 component_del(&pdev->dev, &exynos_dp_ops);
257 analogix_dp_remove(dp->adp);
263 static int exynos_dp_suspend(struct device *dev)
265 struct exynos_dp_device *dp = dev_get_drvdata(dev);
267 return analogix_dp_suspend(dp->adp);
270 static int exynos_dp_resume(struct device *dev)
272 struct exynos_dp_device *dp = dev_get_drvdata(dev);
274 return analogix_dp_resume(dp->adp);
278 static const struct dev_pm_ops exynos_dp_pm_ops = {
279 SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
280 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
281 pm_runtime_force_resume)
284 static const struct of_device_id exynos_dp_match[] = {
285 { .compatible = "samsung,exynos5-dp" },
288 MODULE_DEVICE_TABLE(of, exynos_dp_match);
290 struct platform_driver dp_driver = {
291 .probe = exynos_dp_probe,
292 .remove = exynos_dp_remove,
295 .owner = THIS_MODULE,
296 .pm = &exynos_dp_pm_ops,
297 .of_match_table = exynos_dp_match,
301 MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
302 MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
303 MODULE_LICENSE("GPL v2");