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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 <video/of_display_timing.h>
20#include <video/of_videomode.h>
21#include <video/videomode.h>
22
23#include <drm/drmP.h>
24#include <drm/drm_crtc.h>
25#include <drm/drm_crtc_helper.h>
26#include <drm/drm_panel.h>
27
28#include <drm/bridge/analogix_dp.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_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_ERROR("failed to create a new display mode.\n");
83 return num_modes;
84 }
85
86 drm_display_mode_from_videomode(&dp->vm, mode);
87 connector->display_info.width_mm = mode->width_mm;
88 connector->display_info.height_mm = mode->height_mm;
89
90 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
91 drm_mode_set_name(mode);
92 drm_mode_probed_add(connector, mode);
93
94 return num_modes + 1;
95}
96
97static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
98 struct drm_bridge *bridge,
99 struct drm_connector *connector)
100{
101 struct exynos_dp_device *dp = to_dp(plat_data);
102 struct drm_encoder *encoder = &dp->encoder;
103 int ret;
104
105 drm_connector_register(connector);
106 dp->connector = connector;
107
108
109 if (dp->ptn_bridge) {
110 bridge->next = dp->ptn_bridge;
111 dp->ptn_bridge->encoder = encoder;
112 ret = drm_bridge_attach(encoder->dev, dp->ptn_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 pipe, ret;
162
163
164
165
166
167
168 dev_set_drvdata(dev, NULL);
169
170 dp->dev = dev;
171 dp->drm_dev = drm_dev;
172
173 dp->plat_data.dev_type = EXYNOS_DP;
174 dp->plat_data.power_on = exynos_dp_poweron;
175 dp->plat_data.power_off = exynos_dp_poweroff;
176 dp->plat_data.attach = exynos_dp_bridge_attach;
177 dp->plat_data.get_modes = exynos_dp_get_modes;
178
179 if (!dp->plat_data.panel && !dp->ptn_bridge) {
180 ret = exynos_dp_dt_parse_panel(dp);
181 if (ret)
182 return ret;
183 }
184
185 pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
186 EXYNOS_DISPLAY_TYPE_LCD);
187 if (pipe < 0)
188 return pipe;
189
190 encoder->possible_crtcs = 1 << pipe;
191
192 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
193
194 drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs,
195 DRM_MODE_ENCODER_TMDS, NULL);
196
197 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
198
199 dp->plat_data.encoder = encoder;
200
201 return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
202}
203
204static void exynos_dp_unbind(struct device *dev, struct device *master,
205 void *data)
206{
207 return analogix_dp_unbind(dev, master, data);
208}
209
210static const struct component_ops exynos_dp_ops = {
211 .bind = exynos_dp_bind,
212 .unbind = exynos_dp_unbind,
213};
214
215static int exynos_dp_probe(struct platform_device *pdev)
216{
217 struct device *dev = &pdev->dev;
218 struct device_node *np = NULL, *endpoint = NULL;
219 struct exynos_dp_device *dp;
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 of_node_put(np);
238 if (!dp->plat_data.panel)
239 return -EPROBE_DEFER;
240 goto out;
241 }
242
243 endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
244 if (endpoint) {
245 np = of_graph_get_remote_port_parent(endpoint);
246 if (np) {
247
248 dp->plat_data.panel = of_drm_find_panel(np);
249 if (!dp->plat_data.panel) {
250 dp->ptn_bridge = of_drm_find_bridge(np);
251 if (!dp->ptn_bridge) {
252 of_node_put(np);
253 return -EPROBE_DEFER;
254 }
255 }
256 of_node_put(np);
257 } else {
258 DRM_ERROR("no remote endpoint device node found.\n");
259 return -EINVAL;
260 }
261 } else {
262 DRM_ERROR("no port endpoint subnode found.\n");
263 return -EINVAL;
264 }
265
266out:
267 return component_add(&pdev->dev, &exynos_dp_ops);
268}
269
270static int exynos_dp_remove(struct platform_device *pdev)
271{
272 component_del(&pdev->dev, &exynos_dp_ops);
273
274 return 0;
275}
276
277#ifdef CONFIG_PM
278static int exynos_dp_suspend(struct device *dev)
279{
280 return analogix_dp_suspend(dev);
281}
282
283static int exynos_dp_resume(struct device *dev)
284{
285 return analogix_dp_resume(dev);
286}
287#endif
288
289static const struct dev_pm_ops exynos_dp_pm_ops = {
290 SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
291};
292
293static const struct of_device_id exynos_dp_match[] = {
294 { .compatible = "samsung,exynos5-dp" },
295 {},
296};
297MODULE_DEVICE_TABLE(of, exynos_dp_match);
298
299struct platform_driver dp_driver = {
300 .probe = exynos_dp_probe,
301 .remove = exynos_dp_remove,
302 .driver = {
303 .name = "exynos-dp",
304 .owner = THIS_MODULE,
305 .pm = &exynos_dp_pm_ops,
306 .of_match_table = exynos_dp_match,
307 },
308};
309
310MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
311MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
312MODULE_LICENSE("GPL v2");
313
