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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_of.h>
27#include <drm/drm_panel.h>
28
29#include <drm/bridge/analogix_dp.h>
30#include <drm/exynos_drm.h>
31
32#include "exynos_drm_crtc.h"
33
34#define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
35
36struct exynos_dp_device {
37 struct drm_encoder encoder;
38 struct drm_connector *connector;
39 struct drm_bridge *ptn_bridge;
40 struct drm_device *drm_dev;
41 struct device *dev;
42
43 struct videomode vm;
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_ERROR("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_ERROR("Failed to attach bridge to drm\n");
112 bridge->next = NULL;
113 return ret;
114 }
115 }
116
117 return 0;
118}
119
120static void exynos_dp_mode_set(struct drm_encoder *encoder,
121 struct drm_display_mode *mode,
122 struct drm_display_mode *adjusted_mode)
123{
124}
125
126static void exynos_dp_nop(struct drm_encoder *encoder)
127{
128
129}
130
131static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
132 .mode_set = exynos_dp_mode_set,
133 .enable = exynos_dp_nop,
134 .disable = exynos_dp_nop,
135};
136
137static const struct drm_encoder_funcs exynos_dp_encoder_funcs = {
138 .destroy = drm_encoder_cleanup,
139};
140
141static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
142{
143 int ret;
144
145 ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
146 if (ret) {
147 DRM_ERROR("failed: of_get_videomode() : %d\n", ret);
148 return ret;
149 }
150 return 0;
151}
152
153static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
154{
155 struct exynos_dp_device *dp = dev_get_drvdata(dev);
156 struct drm_encoder *encoder = &dp->encoder;
157 struct drm_device *drm_dev = data;
158 int ret;
159
160
161
162
163
164
165 dev_set_drvdata(dev, NULL);
166
167 dp->dev = dev;
168 dp->drm_dev = drm_dev;
169
170 dp->plat_data.dev_type = EXYNOS_DP;
171 dp->plat_data.power_on = exynos_dp_poweron;
172 dp->plat_data.power_off = exynos_dp_poweroff;
173 dp->plat_data.attach = exynos_dp_bridge_attach;
174 dp->plat_data.get_modes = exynos_dp_get_modes;
175
176 if (!dp->plat_data.panel && !dp->ptn_bridge) {
177 ret = exynos_dp_dt_parse_panel(dp);
178 if (ret)
179 return ret;
180 }
181
182 drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs,
183 DRM_MODE_ENCODER_TMDS, NULL);
184
185 drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
186
187 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
188 if (ret < 0)
189 return ret;
190
191 dp->plat_data.encoder = encoder;
192
193 return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
194}
195
196static void exynos_dp_unbind(struct device *dev, struct device *master,
197 void *data)
198{
199 return analogix_dp_unbind(dev, master, data);
200}
201
202static const struct component_ops exynos_dp_ops = {
203 .bind = exynos_dp_bind,
204 .unbind = exynos_dp_unbind,
205};
206
207static int exynos_dp_probe(struct platform_device *pdev)
208{
209 struct device *dev = &pdev->dev;
210 struct device_node *np;
211 struct exynos_dp_device *dp;
212 struct drm_panel *panel;
213 struct drm_bridge *bridge;
214 int ret;
215
216 dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
217 GFP_KERNEL);
218 if (!dp)
219 return -ENOMEM;
220
221
222
223
224
225
226 platform_set_drvdata(pdev, dp);
227
228
229 np = of_parse_phandle(dev->of_node, "panel", 0);
230 if (np) {
231 dp->plat_data.panel = of_drm_find_panel(np);
232 of_node_put(np);
233 if (!dp->plat_data.panel)
234 return -EPROBE_DEFER;
235 goto out;
236 }
237
238 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
239 if (ret)
240 return ret;
241
242
243 dp->plat_data.panel = panel;
244 dp->ptn_bridge = bridge;
245
246out:
247 return component_add(&pdev->dev, &exynos_dp_ops);
248}
249
250static int exynos_dp_remove(struct platform_device *pdev)
251{
252 component_del(&pdev->dev, &exynos_dp_ops);
253
254 return 0;
255}
256
257#ifdef CONFIG_PM
258static int exynos_dp_suspend(struct device *dev)
259{
260 return analogix_dp_suspend(dev);
261}
262
263static int exynos_dp_resume(struct device *dev)
264{
265 return analogix_dp_resume(dev);
266}
267#endif
268
269static const struct dev_pm_ops exynos_dp_pm_ops = {
270 SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
271};
272
273static const struct of_device_id exynos_dp_match[] = {
274 { .compatible = "samsung,exynos5-dp" },
275 {},
276};
277MODULE_DEVICE_TABLE(of, exynos_dp_match);
278
279struct platform_driver dp_driver = {
280 .probe = exynos_dp_probe,
281 .remove = exynos_dp_remove,
282 .driver = {
283 .name = "exynos-dp",
284 .owner = THIS_MODULE,
285 .pm = &exynos_dp_pm_ops,
286 .of_match_table = exynos_dp_match,
287 },
288};
289
290MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
291MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension");
292MODULE_LICENSE("GPL v2");
293
