1
2
3
4
5
6
7
8
9#include <linux/clk.h>
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>
19
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>
30
31#include "exynos_drm_crtc.h"
32
33#define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
34
35struct 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;
40 struct device *dev;
41
42 struct videomode vm;
43 struct analogix_dp_device *adp;
44 struct analogix_dp_plat_data plat_data;
45};
46
47static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
48 bool enable)
49{
50 struct exynos_dp_device *dp = to_dp(plat_data);
51 struct drm_encoder *encoder = &dp->encoder;
52
53 if (!encoder->crtc)
54 return -EPERM;
55
56 exynos_drm_pipe_clk_enable(to_exynos_crtc(encoder->crtc), enable);
57
58 return 0;
59}
60
61static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
62{
63 return exynos_dp_crtc_clock_enable(plat_data, true);
64}
65
66static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
67{
68 return exynos_dp_crtc_clock_enable(plat_data, false);
69}
70
71static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
72 struct drm_connector *connector)
73{
74 struct exynos_dp_device *dp = to_dp(plat_data);
75 struct drm_display_mode *mode;
76 int num_modes = 0;
77
78 if (dp->plat_data.panel)
79 return num_modes;
80
81 mode = drm_mode_create(connector->dev);
82 if (!mode) {
83 DRM_DEV_ERROR(dp->dev,
84 "failed to create a new display mode.\n");
85 return num_modes;
86 }
87
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;
91
92 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
93 drm_mode_set_name(mode);
94 drm_mode_probed_add(connector, mode);
95
96 return num_modes + 1;
97}
98
99static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
100 struct drm_bridge *bridge,
101 struct drm_connector *connector)
102{
103 struct exynos_dp_device *dp = to_dp(plat_data);
104 int ret;
105
106 dp->connector = connector;
107
108
109 if (dp->ptn_bridge) {
110 ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge,
111 0);
112 if (ret) {
113 DRM_DEV_ERROR(dp->dev,
114 "Failed to attach bridge to drm\n");
115 return ret;
116 }
117 }
118
119 return 0;
120}
121
122static void exynos_dp_mode_set(struct drm_encoder *encoder,
123 struct drm_display_mode *mode,
124 struct drm_display_mode *adjusted_mode)
125{
126}
127
128static void exynos_dp_nop(struct drm_encoder *encoder)
129{
130
131}
132
133static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
134 .mode_set = exynos_dp_mode_set,
135 .enable = exynos_dp_nop,
136 .disable = exynos_dp_nop,
137};
138
139static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
140{
141 int ret;
142
143 ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
144 if (ret) {
145 DRM_DEV_ERROR(dp->dev,
146 "failed: of_get_videomode() : %d\n", ret);
147 return ret;
148 }
149 return 0;
150}
151
152static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
153{
154 struct exynos_dp_device *dp = dev_get_drvdata(dev);
155 struct drm_encoder *encoder = &dp->encoder;
156 struct drm_device *drm_dev = data;
157 int ret;
158
159 dp->drm_dev = drm_dev;
160
161 if (!dp->plat_data.panel && !dp->ptn_bridge) {
162 ret = exynos_dp_dt_parse_panel(dp);
163 if (ret)
164 return ret;
165 }
166
167 drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
168
169 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
170
171 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
172 if (ret < 0)
173 return ret;
174
175 dp->plat_data.encoder = encoder;
176
177 ret = analogix_dp_bind(dp->adp, dp->drm_dev);
178 if (ret)
179 dp->encoder.funcs->destroy(&dp->encoder);
180
181 return ret;
182}
183
184static void exynos_dp_unbind(struct device *dev, struct device *master,
185 void *data)
186{
187 struct exynos_dp_device *dp = dev_get_drvdata(dev);
188
189 analogix_dp_unbind(dp->adp);
190 dp->encoder.funcs->destroy(&dp->encoder);
191}
192
193static const struct component_ops exynos_dp_ops = {
194 .bind = exynos_dp_bind,
195 .unbind = exynos_dp_unbind,
196};
197
198static int exynos_dp_probe(struct platform_device *pdev)
199{
200 struct device *dev = &pdev->dev;
201 struct device_node *np;
202 struct exynos_dp_device *dp;
203 struct drm_panel *panel;
204 struct drm_bridge *bridge;
205 int ret;
206
207 dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
208 GFP_KERNEL);
209 if (!dp)
210 return -ENOMEM;
211
212 dp->dev = dev;
213
214
215
216
217
218 platform_set_drvdata(pdev, dp);
219
220
221 np = of_parse_phandle(dev->of_node, "panel", 0);
222 if (np) {
223 dp->plat_data.panel = of_drm_find_panel(np);
224
225 of_node_put(np);
226 if (IS_ERR(dp->plat_data.panel))
227 return PTR_ERR(dp->plat_data.panel);
228
229 goto out;
230 }
231
232 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
233 if (ret)
234 return ret;
235
236
237 dp->plat_data.panel = panel;
238 dp->plat_data.dev_type = EXYNOS_DP;
239 dp->plat_data.power_on_start = exynos_dp_poweron;
240 dp->plat_data.power_off = exynos_dp_poweroff;
241 dp->plat_data.attach = exynos_dp_bridge_attach;
242 dp->plat_data.get_modes = exynos_dp_get_modes;
243 dp->plat_data.skip_connector = !!bridge;
244
245 dp->ptn_bridge = bridge;
246
247out:
248 dp->adp = analogix_dp_probe(dev, &dp->plat_data);
249 if (IS_ERR(dp->adp))
250 return PTR_ERR(dp->adp);
251
252 return component_add(&pdev->dev, &exynos_dp_ops);
253}
254
255static int exynos_dp_remove(struct platform_device *pdev)
256{
257 struct exynos_dp_device *dp = platform_get_drvdata(pdev);
258
259 component_del(&pdev->dev, &exynos_dp_ops);
260 analogix_dp_remove(dp->adp);
261
262 return 0;
263}
264
265#ifdef CONFIG_PM
266static int exynos_dp_suspend(struct device *dev)
267{
268 struct exynos_dp_device *dp = dev_get_drvdata(dev);
269
270 return analogix_dp_suspend(dp->adp);
271}
272
273static int exynos_dp_resume(struct device *dev)
274{
275 struct exynos_dp_device *dp = dev_get_drvdata(dev);
276
277 return analogix_dp_resume(dp->adp);
278}
279#endif
280
281static const struct dev_pm_ops exynos_dp_pm_ops = {
282 SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
283 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
284 pm_runtime_force_resume)
285};
286
287static const struct of_device_id exynos_dp_match[] = {
288 { .compatible = "samsung,exynos5-dp" },
289 {},
290};
291MODULE_DEVICE_TABLE(of, exynos_dp_match);
292
293struct platform_driver dp_driver = {
294 .probe = exynos_dp_probe,
295 .remove = exynos_dp_remove,
296 .driver = {
297 .name = "exynos-dp",
298 .owner = THIS_MODULE,
299 .pm = &exynos_dp_pm_ops,
300 .of_match_table = exynos_dp_match,
301 },
302};
303
304MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
305MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
306MODULE_LICENSE("GPL v2");
307
