1
2
3
4
5
6
7
8
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/err.h>
12#include <linux/clk.h>
13#include <linux/of_graph.h>
14#include <linux/component.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>
19
20#include <drm/drmP.h>
21#include <drm/drm_atomic_helper.h>
22#include <drm/drm_crtc.h>
23#include <drm/drm_of.h>
24#include <drm/drm_panel.h>
25#include <drm/drm_probe_helper.h>
26
27#include <drm/bridge/analogix_dp.h>
28#include <drm/exynos_drm.h>
29
30#include "exynos_drm_crtc.h"
31
32#define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
33
34struct exynos_dp_device {
35 struct drm_encoder encoder;
36 struct drm_connector *connector;
37 struct drm_bridge *ptn_bridge;
38 struct drm_device *drm_dev;
39 struct device *dev;
40
41 struct videomode vm;
42 struct analogix_dp_device *adp;
43 struct analogix_dp_plat_data plat_data;
44};
45
46static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
47 bool enable)
48{
49 struct exynos_dp_device *dp = to_dp(plat_data);
50 struct drm_encoder *encoder = &dp->encoder;
51
52 if (!encoder->crtc)
53 return -EPERM;
54
55 exynos_drm_pipe_clk_enable(to_exynos_crtc(encoder->crtc), enable);
56
57 return 0;
58}
59
60static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
61{
62 return exynos_dp_crtc_clock_enable(plat_data, true);
63}
64
65static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
66{
67 return exynos_dp_crtc_clock_enable(plat_data, false);
68}
69
70static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
71 struct drm_connector *connector)
72{
73 struct exynos_dp_device *dp = to_dp(plat_data);
74 struct drm_display_mode *mode;
75 int num_modes = 0;
76
77 if (dp->plat_data.panel)
78 return num_modes;
79
80 mode = drm_mode_create(connector->dev);
81 if (!mode) {
82 DRM_DEV_ERROR(dp->dev,
83 "failed to create a new display mode.\n");
84 return num_modes;
85 }
86
87 drm_display_mode_from_videomode(&dp->vm, mode);
88 connector->display_info.width_mm = mode->width_mm;
89 connector->display_info.height_mm = mode->height_mm;
90
91 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
92 drm_mode_set_name(mode);
93 drm_mode_probed_add(connector, mode);
94
95 return num_modes + 1;
96}
97
98static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
99 struct drm_bridge *bridge,
100 struct drm_connector *connector)
101{
102 struct exynos_dp_device *dp = to_dp(plat_data);
103 int ret;
104
105 dp->connector = connector;
106
107
108 if (dp->ptn_bridge) {
109 ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge);
110 if (ret) {
111 DRM_DEV_ERROR(dp->dev,
112 "Failed to attach bridge to drm\n");
113 bridge->next = NULL;
114 return ret;
115 }
116 }
117
118 return 0;
119}
120
121static void exynos_dp_mode_set(struct drm_encoder *encoder,
122 struct drm_display_mode *mode,
123 struct drm_display_mode *adjusted_mode)
124{
125}
126
127static void exynos_dp_nop(struct drm_encoder *encoder)
128{
129
130}
131
132static 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,
136};
137
138static const struct drm_encoder_funcs exynos_dp_encoder_funcs = {
139 .destroy = drm_encoder_cleanup,
140};
141
142static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
143{
144 int ret;
145
146 ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
147 if (ret) {
148 DRM_DEV_ERROR(dp->dev,
149 "failed: of_get_videomode() : %d\n", ret);
150 return ret;
151 }
152 return 0;
153}
154
155static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
156{
157 struct exynos_dp_device *dp = dev_get_drvdata(dev);
158 struct drm_encoder *encoder = &dp->encoder;
159 struct drm_device *drm_dev = data;
160 int ret;
161
162 dp->dev = dev;
163 dp->drm_dev = drm_dev;
164
165 dp->plat_data.dev_type = EXYNOS_DP;
166 dp->plat_data.power_on_start = exynos_dp_poweron;
167 dp->plat_data.power_off = exynos_dp_poweroff;
168 dp->plat_data.attach = exynos_dp_bridge_attach;
169 dp->plat_data.get_modes = exynos_dp_get_modes;
170
171 if (!dp->plat_data.panel && !dp->ptn_bridge) {
172 ret = exynos_dp_dt_parse_panel(dp);
173 if (ret)
174 return ret;
175 }
176
177 drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs,
178 DRM_MODE_ENCODER_TMDS, NULL);
179
180 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
181
182 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
183 if (ret < 0)
184 return ret;
185
186 dp->plat_data.encoder = encoder;
187
188 dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
189 if (IS_ERR(dp->adp)) {
190 dp->encoder.funcs->destroy(&dp->encoder);
191 return PTR_ERR(dp->adp);
192 }
193
194 return 0;
195}
196
197static void exynos_dp_unbind(struct device *dev, struct device *master,
198 void *data)
199{
200 struct exynos_dp_device *dp = dev_get_drvdata(dev);
201
202 analogix_dp_unbind(dp->adp);
203 dp->encoder.funcs->destroy(&dp->encoder);
204}
205
206static const struct component_ops exynos_dp_ops = {
207 .bind = exynos_dp_bind,
208 .unbind = exynos_dp_unbind,
209};
210
211static int exynos_dp_probe(struct platform_device *pdev)
212{
213 struct device *dev = &pdev->dev;
214 struct device_node *np;
215 struct exynos_dp_device *dp;
216 struct drm_panel *panel;
217 struct drm_bridge *bridge;
218 int ret;
219
220 dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
221 GFP_KERNEL);
222 if (!dp)
223 return -ENOMEM;
224
225
226
227
228
229
230 platform_set_drvdata(pdev, dp);
231
232
233 np = of_parse_phandle(dev->of_node, "panel", 0);
234 if (np) {
235 dp->plat_data.panel = of_drm_find_panel(np);
236
237 of_node_put(np);
238 if (IS_ERR(dp->plat_data.panel))
239 return PTR_ERR(dp->plat_data.panel);
240
241 goto out;
242 }
243
244 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
245 if (ret)
246 return ret;
247
248
249 dp->plat_data.panel = panel;
250 dp->plat_data.skip_connector = !!bridge;
251 dp->ptn_bridge = bridge;
252
253out:
254 return component_add(&pdev->dev, &exynos_dp_ops);
255}
256
257static int exynos_dp_remove(struct platform_device *pdev)
258{
259 component_del(&pdev->dev, &exynos_dp_ops);
260
261 return 0;
262}
263
264#ifdef CONFIG_PM
265static int exynos_dp_suspend(struct device *dev)
266{
267 struct exynos_dp_device *dp = dev_get_drvdata(dev);
268
269 return analogix_dp_suspend(dp->adp);
270}
271
272static int exynos_dp_resume(struct device *dev)
273{
274 struct exynos_dp_device *dp = dev_get_drvdata(dev);
275
276 return analogix_dp_resume(dp->adp);
277}
278#endif
279
280static const struct dev_pm_ops exynos_dp_pm_ops = {
281 SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
282 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
283 pm_runtime_force_resume)
284};
285
286static const struct of_device_id exynos_dp_match[] = {
287 { .compatible = "samsung,exynos5-dp" },
288 {},
289};
290MODULE_DEVICE_TABLE(of, exynos_dp_match);
291
292struct platform_driver dp_driver = {
293 .probe = exynos_dp_probe,
294 .remove = exynos_dp_remove,
295 .driver = {
296 .name = "exynos-dp",
297 .owner = THIS_MODULE,
298 .pm = &exynos_dp_pm_ops,
299 .of_match_table = exynos_dp_match,
300 },
301};
302
303MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
304MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
305MODULE_LICENSE("GPL v2");
306
