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 <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_panel.h>
28 #include <drm/bridge/analogix_dp.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_plat_data plat_data;
46 int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
49 struct exynos_dp_device *dp = to_dp(plat_data);
50 struct drm_encoder *encoder = &dp->encoder;
51 struct exynos_drm_crtc *crtc;
56 crtc = to_exynos_crtc(encoder->crtc);
57 if (crtc && crtc->ops && crtc->ops->clock_enable)
58 crtc->ops->clock_enable(crtc, enable);
63 static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
65 return exynos_dp_crtc_clock_enable(plat_data, true);
68 static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
70 return exynos_dp_crtc_clock_enable(plat_data, false);
73 static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data)
75 struct exynos_dp_device *dp = to_dp(plat_data);
76 struct drm_connector *connector = &dp->connector;
77 struct drm_display_mode *mode;
80 if (dp->plat_data.panel)
83 mode = drm_mode_create(connector->dev);
85 DRM_ERROR("failed to create a new display mode.\n");
89 drm_display_mode_from_videomode(&dp->priv.vm, mode);
90 mode->width_mm = dp->priv.width_mm;
91 mode->height_mm = dp->priv.height_mm;
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);
107 struct drm_encoder *encoder = &dp->encoder;
110 drm_connector_register(connector);
112 /* Pre-empt DP connector creation if there's a bridge */
113 if (dp->ptn_bridge) {
114 bridge->next = dp->ptn_bridge;
115 dp->ptn_bridge->encoder = encoder;
116 ret = drm_bridge_attach(encoder->dev, dp->ptn_bridge);
118 DRM_ERROR("Failed to attach bridge to drm\n");
127 static void exynos_dp_mode_set(struct drm_encoder *encoder,
128 struct drm_display_mode *mode,
129 struct drm_display_mode *adjusted_mode)
133 static void exynos_dp_nop(struct drm_encoder *encoder)
138 static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
139 .mode_set = exynos_dp_mode_set,
140 .enable = exynos_dp_nop,
141 .disable = exynos_dp_nop,
144 static const struct drm_encoder_funcs exynos_dp_encoder_funcs = {
145 .destroy = drm_encoder_cleanup,
148 static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
152 ret = of_get_videomode(dp->dev->of_node, &dp->priv.vm,
155 DRM_ERROR("failed: of_get_videomode() : %d\n", ret);
161 static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
163 struct exynos_dp_device *dp = dev_get_drvdata(dev);
164 struct drm_encoder *encoder = &dp->encoder;
165 struct drm_device *drm_dev = data;
169 * Just like the probe function said, we don't need the
170 * device drvrate anymore, we should leave the charge to
171 * analogix dp driver, set the device drvdata to NULL.
173 dev_set_drvdata(dev, NULL);
176 dp->drm_dev = drm_dev;
178 dp->plat_data.dev_type = EXYNOS_DP;
179 dp->plat_data.power_on = exynos_dp_poweron;
180 dp->plat_data.power_off = exynos_dp_poweroff;
181 dp->plat_data.attach = exynos_dp_bridge_attach;
182 dp->plat_data.get_modes = exynos_dp_get_modes;
184 if (!dp->plat_data.panel && !dp->ptn_bridge) {
185 ret = exynos_dp_dt_parse_panel(dp);
190 pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
191 EXYNOS_DISPLAY_TYPE_LCD);
195 encoder->possible_crtcs = 1 << pipe;
197 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
199 drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs,
200 DRM_MODE_ENCODER_TMDS, NULL);
202 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
204 dp->plat_data.encoder = encoder;
206 return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
209 static void exynos_dp_unbind(struct device *dev, struct device *master,
212 return analogix_dp_unbind(dev, master, data);
215 static const struct component_ops exynos_dp_ops = {
216 .bind = exynos_dp_bind,
217 .unbind = exynos_dp_unbind,
220 static int exynos_dp_probe(struct platform_device *pdev)
222 struct device *dev = &pdev->dev;
223 struct device_node *np = NULL, *endpoint = NULL;
224 struct exynos_dp_device *dp;
226 dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
232 * We just use the drvdata until driver run into component
233 * add function, and then we would set drvdata to null, so
234 * that analogix dp driver would take charge of the drvdata.
236 platform_set_drvdata(pdev, dp);
238 /* This is for the backward compatibility. */
239 np = of_parse_phandle(dev->of_node, "panel", 0);
241 dp->plat_data.panel = of_drm_find_panel(np);
243 if (!dp->plat_data.panel)
244 return -EPROBE_DEFER;
248 endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
250 np = of_graph_get_remote_port_parent(endpoint);
252 /* The remote port can be either a panel or a bridge */
253 dp->plat_data.panel = of_drm_find_panel(np);
254 if (!dp->plat_data.panel) {
255 dp->ptn_bridge = of_drm_find_bridge(np);
256 if (!dp->ptn_bridge) {
258 return -EPROBE_DEFER;
263 DRM_ERROR("no remote endpoint device node found.\n");
267 DRM_ERROR("no port endpoint subnode found.\n");
272 return component_add(&pdev->dev, &exynos_dp_ops);
275 static int exynos_dp_remove(struct platform_device *pdev)
277 component_del(&pdev->dev, &exynos_dp_ops);
283 static int exynos_dp_suspend(struct device *dev)
285 return analogix_dp_suspend(dev);
288 static int exynos_dp_resume(struct device *dev)
290 return analogix_dp_resume(dev);
294 static const struct dev_pm_ops exynos_dp_pm_ops = {
295 SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
298 static const struct of_device_id exynos_dp_match[] = {
299 { .compatible = "samsung,exynos5-dp" },
302 MODULE_DEVICE_TABLE(of, exynos_dp_match);
304 struct platform_driver dp_driver = {
305 .probe = exynos_dp_probe,
306 .remove = exynos_dp_remove,
309 .owner = THIS_MODULE,
310 .pm = &exynos_dp_pm_ops,
311 .of_match_table = exynos_dp_match,
315 MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
316 MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
317 MODULE_LICENSE("GPL v2");