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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 <linux/pm_runtime.h>
20#include <video/of_display_timing.h>
21#include <video/of_videomode.h>
22#include <video/videomode.h>
23
24#include <drm/drmP.h>
25#include <drm/drm_atomic_helper.h>
26#include <drm/drm_crtc.h>
27#include <drm/drm_of.h>
28#include <drm/drm_panel.h>
29#include <drm/drm_probe_helper.h>
30
31#include <drm/bridge/analogix_dp.h>
32#include <drm/exynos_drm.h>
33
34#include "exynos_drm_crtc.h"
35
36#define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
37
38struct exynos_dp_device {
39 struct drm_encoder encoder;
40 struct drm_connector *connector;
41 struct drm_bridge *ptn_bridge;
42 struct drm_device *drm_dev;
43 struct device *dev;
44
45 struct videomode vm;
46 struct analogix_dp_device *adp;
47 struct analogix_dp_plat_data plat_data;
48};
49
50static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
51 bool enable)
52{
53 struct exynos_dp_device *dp = to_dp(plat_data);
54 struct drm_encoder *encoder = &dp->encoder;
55
56 if (!encoder->crtc)
57 return -EPERM;
58
59 exynos_drm_pipe_clk_enable(to_exynos_crtc(encoder->crtc), enable);
60
61 return 0;
62}
63
64static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data)
65{
66 return exynos_dp_crtc_clock_enable(plat_data, true);
67}
68
69static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
70{
71 return exynos_dp_crtc_clock_enable(plat_data, false);
72}
73
74static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
75 struct drm_connector *connector)
76{
77 struct exynos_dp_device *dp = to_dp(plat_data);
78 struct drm_display_mode *mode;
79 int num_modes = 0;
80
81 if (dp->plat_data.panel)
82 return num_modes;
83
84 mode = drm_mode_create(connector->dev);
85 if (!mode) {
86 DRM_ERROR("failed to create a new display mode.\n");
87 return num_modes;
88 }
89
90 drm_display_mode_from_videomode(&dp->vm, mode);
91 connector->display_info.width_mm = mode->width_mm;
92 connector->display_info.height_mm = mode->height_mm;
93
94 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
95 drm_mode_set_name(mode);
96 drm_mode_probed_add(connector, mode);
97
98 return num_modes + 1;
99}
100
101static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
102 struct drm_bridge *bridge,
103 struct drm_connector *connector)
104{
105 struct exynos_dp_device *dp = to_dp(plat_data);
106 int ret;
107
108 dp->connector = connector;
109
110
111 if (dp->ptn_bridge) {
112 ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge);
113 if (ret) {
114 DRM_ERROR("Failed to attach bridge to drm\n");
115 bridge->next = NULL;
116 return ret;
117 }
118 }
119
120 return 0;
121}
122
123static void exynos_dp_mode_set(struct drm_encoder *encoder,
124 struct drm_display_mode *mode,
125 struct drm_display_mode *adjusted_mode)
126{
127}
128
129static void exynos_dp_nop(struct drm_encoder *encoder)
130{
131
132}
133
134static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
135 .mode_set = exynos_dp_mode_set,
136 .enable = exynos_dp_nop,
137 .disable = exynos_dp_nop,
138};
139
140static const struct drm_encoder_funcs exynos_dp_encoder_funcs = {
141 .destroy = drm_encoder_cleanup,
142};
143
144static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
145{
146 int ret;
147
148 ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
149 if (ret) {
150 DRM_ERROR("failed: of_get_videomode() : %d\n", ret);
151 return ret;
152 }
153 return 0;
154}
155
156static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
157{
158 struct exynos_dp_device *dp = dev_get_drvdata(dev);
159 struct drm_encoder *encoder = &dp->encoder;
160 struct drm_device *drm_dev = data;
161 int ret;
162
163 dp->dev = dev;
164 dp->drm_dev = drm_dev;
165
166 dp->plat_data.dev_type = EXYNOS_DP;
167 dp->plat_data.power_on_start = exynos_dp_poweron;
168 dp->plat_data.power_off = exynos_dp_poweroff;
169 dp->plat_data.attach = exynos_dp_bridge_attach;
170 dp->plat_data.get_modes = exynos_dp_get_modes;
171
172 if (!dp->plat_data.panel && !dp->ptn_bridge) {
173 ret = exynos_dp_dt_parse_panel(dp);
174 if (ret)
175 return ret;
176 }
177
178 drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs,
179 DRM_MODE_ENCODER_TMDS, NULL);
180
181 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
182
183 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
184 if (ret < 0)
185 return ret;
186
187 dp->plat_data.encoder = encoder;
188
189 dp->adp = analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
190 if (IS_ERR(dp->adp)) {
191 dp->encoder.funcs->destroy(&dp->encoder);
192 return PTR_ERR(dp->adp);
193 }
194
195 return 0;
196}
197
198static void exynos_dp_unbind(struct device *dev, struct device *master,
199 void *data)
200{
201 struct exynos_dp_device *dp = dev_get_drvdata(dev);
202
203 analogix_dp_unbind(dp->adp);
204 dp->encoder.funcs->destroy(&dp->encoder);
205}
206
207static const struct component_ops exynos_dp_ops = {
208 .bind = exynos_dp_bind,
209 .unbind = exynos_dp_unbind,
210};
211
212static int exynos_dp_probe(struct platform_device *pdev)
213{
214 struct device *dev = &pdev->dev;
215 struct device_node *np;
216 struct exynos_dp_device *dp;
217 struct drm_panel *panel;
218 struct drm_bridge *bridge;
219 int ret;
220
221 dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
222 GFP_KERNEL);
223 if (!dp)
224 return -ENOMEM;
225
226
227
228
229
230
231 platform_set_drvdata(pdev, dp);
232
233
234 np = of_parse_phandle(dev->of_node, "panel", 0);
235 if (np) {
236 dp->plat_data.panel = of_drm_find_panel(np);
237
238 of_node_put(np);
239 if (IS_ERR(dp->plat_data.panel))
240 return PTR_ERR(dp->plat_data.panel);
241
242 goto out;
243 }
244
245 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
246 if (ret)
247 return ret;
248
249
250 dp->plat_data.panel = panel;
251 dp->plat_data.skip_connector = !!bridge;
252 dp->ptn_bridge = bridge;
253
254out:
255 return component_add(&pdev->dev, &exynos_dp_ops);
256}
257
258static int exynos_dp_remove(struct platform_device *pdev)
259{
260 component_del(&pdev->dev, &exynos_dp_ops);
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
