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12#define DSS_SUBSYS_NAME "DISPLAY"
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/jiffies.h>
17#include <linux/platform_device.h>
18#include <linux/of.h>
19
20#include <video/omapfb_dss.h>
21#include "dss.h"
22#include "dss_features.h"
23
24void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
25 u16 *xres, u16 *yres)
26{
27 *xres = dssdev->panel.timings.x_res;
28 *yres = dssdev->panel.timings.y_res;
29}
30EXPORT_SYMBOL(omapdss_default_get_resolution);
31
32int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
33{
34 switch (dssdev->type) {
35 case OMAP_DISPLAY_TYPE_DPI:
36 if (dssdev->phy.dpi.data_lines == 24)
37 return 24;
38 else
39 return 16;
40
41 case OMAP_DISPLAY_TYPE_DBI:
42 if (dssdev->ctrl.pixel_size == 24)
43 return 24;
44 else
45 return 16;
46 case OMAP_DISPLAY_TYPE_DSI:
47 if (dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt) > 16)
48 return 24;
49 else
50 return 16;
51 case OMAP_DISPLAY_TYPE_VENC:
52 case OMAP_DISPLAY_TYPE_SDI:
53 case OMAP_DISPLAY_TYPE_HDMI:
54 case OMAP_DISPLAY_TYPE_DVI:
55 return 24;
56 default:
57 BUG();
58 return 0;
59 }
60}
61EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
62
63void omapdss_default_get_timings(struct omap_dss_device *dssdev,
64 struct omap_video_timings *timings)
65{
66 *timings = dssdev->panel.timings;
67}
68EXPORT_SYMBOL(omapdss_default_get_timings);
69
70int dss_suspend_all_devices(void)
71{
72 struct omap_dss_device *dssdev = NULL;
73
74 for_each_dss_dev(dssdev) {
75 if (!dssdev->driver)
76 continue;
77
78 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
79 dssdev->driver->disable(dssdev);
80 dssdev->activate_after_resume = true;
81 } else {
82 dssdev->activate_after_resume = false;
83 }
84 }
85
86 return 0;
87}
88
89int dss_resume_all_devices(void)
90{
91 struct omap_dss_device *dssdev = NULL;
92
93 for_each_dss_dev(dssdev) {
94 if (!dssdev->driver)
95 continue;
96
97 if (dssdev->activate_after_resume) {
98 dssdev->driver->enable(dssdev);
99 dssdev->activate_after_resume = false;
100 }
101 }
102
103 return 0;
104}
105
106void dss_disable_all_devices(void)
107{
108 struct omap_dss_device *dssdev = NULL;
109
110 for_each_dss_dev(dssdev) {
111 if (!dssdev->driver)
112 continue;
113
114 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
115 dssdev->driver->disable(dssdev);
116 }
117}
118
119static LIST_HEAD(panel_list);
120static DEFINE_MUTEX(panel_list_mutex);
121static int disp_num_counter;
122
123int omapdss_register_display(struct omap_dss_device *dssdev)
124{
125 struct omap_dss_driver *drv = dssdev->driver;
126 int id;
127
128
129
130
131
132
133
134 if (dssdev->dev->of_node) {
135 id = of_alias_get_id(dssdev->dev->of_node, "display");
136
137 if (id < 0)
138 id = disp_num_counter++;
139 } else {
140 id = disp_num_counter++;
141 }
142
143 snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);
144
145
146 if (dssdev->dev->of_node)
147 of_property_read_string(dssdev->dev->of_node, "label",
148 &dssdev->name);
149
150 if (dssdev->name == NULL)
151 dssdev->name = dssdev->alias;
152
153 if (drv && drv->get_resolution == NULL)
154 drv->get_resolution = omapdss_default_get_resolution;
155 if (drv && drv->get_recommended_bpp == NULL)
156 drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
157 if (drv && drv->get_timings == NULL)
158 drv->get_timings = omapdss_default_get_timings;
159
160 mutex_lock(&panel_list_mutex);
161 list_add_tail(&dssdev->panel_list, &panel_list);
162 mutex_unlock(&panel_list_mutex);
163 return 0;
164}
165EXPORT_SYMBOL(omapdss_register_display);
166
167void omapdss_unregister_display(struct omap_dss_device *dssdev)
168{
169 mutex_lock(&panel_list_mutex);
170 list_del(&dssdev->panel_list);
171 mutex_unlock(&panel_list_mutex);
172}
173EXPORT_SYMBOL(omapdss_unregister_display);
174
175struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
176{
177 if (!try_module_get(dssdev->owner))
178 return NULL;
179
180 if (get_device(dssdev->dev) == NULL) {
181 module_put(dssdev->owner);
182 return NULL;
183 }
184
185 return dssdev;
186}
187EXPORT_SYMBOL(omap_dss_get_device);
188
189void omap_dss_put_device(struct omap_dss_device *dssdev)
190{
191 put_device(dssdev->dev);
192 module_put(dssdev->owner);
193}
194EXPORT_SYMBOL(omap_dss_put_device);
195
196
197
198
199
200struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
201{
202 struct list_head *l;
203 struct omap_dss_device *dssdev;
204
205 mutex_lock(&panel_list_mutex);
206
207 if (list_empty(&panel_list)) {
208 dssdev = NULL;
209 goto out;
210 }
211
212 if (from == NULL) {
213 dssdev = list_first_entry(&panel_list, struct omap_dss_device,
214 panel_list);
215 omap_dss_get_device(dssdev);
216 goto out;
217 }
218
219 omap_dss_put_device(from);
220
221 list_for_each(l, &panel_list) {
222 dssdev = list_entry(l, struct omap_dss_device, panel_list);
223 if (dssdev == from) {
224 if (list_is_last(l, &panel_list)) {
225 dssdev = NULL;
226 goto out;
227 }
228
229 dssdev = list_entry(l->next, struct omap_dss_device,
230 panel_list);
231 omap_dss_get_device(dssdev);
232 goto out;
233 }
234 }
235
236 WARN(1, "'from' dssdev not found\n");
237
238 dssdev = NULL;
239out:
240 mutex_unlock(&panel_list_mutex);
241 return dssdev;
242}
243EXPORT_SYMBOL(omap_dss_get_next_device);
244
245struct omap_dss_device *omap_dss_find_device(void *data,
246 int (*match)(struct omap_dss_device *dssdev, void *data))
247{
248 struct omap_dss_device *dssdev = NULL;
249
250 while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
251 if (match(dssdev, data))
252 return dssdev;
253 }
254
255 return NULL;
256}
257EXPORT_SYMBOL(omap_dss_find_device);
258
259void videomode_to_omap_video_timings(const struct videomode *vm,
260 struct omap_video_timings *ovt)
261{
262 memset(ovt, 0, sizeof(*ovt));
263
264 ovt->pixelclock = vm->pixelclock;
265 ovt->x_res = vm->hactive;
266 ovt->hbp = vm->hback_porch;
267 ovt->hfp = vm->hfront_porch;
268 ovt->hsw = vm->hsync_len;
269 ovt->y_res = vm->vactive;
270 ovt->vbp = vm->vback_porch;
271 ovt->vfp = vm->vfront_porch;
272 ovt->vsw = vm->vsync_len;
273
274 ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
275 OMAPDSS_SIG_ACTIVE_HIGH :
276 OMAPDSS_SIG_ACTIVE_LOW;
277 ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
278 OMAPDSS_SIG_ACTIVE_HIGH :
279 OMAPDSS_SIG_ACTIVE_LOW;
280 ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
281 OMAPDSS_SIG_ACTIVE_HIGH :
282 OMAPDSS_SIG_ACTIVE_LOW;
283 ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
284 OMAPDSS_DRIVE_SIG_RISING_EDGE :
285 OMAPDSS_DRIVE_SIG_FALLING_EDGE;
286
287 ovt->sync_pclk_edge = ovt->data_pclk_edge;
288}
289EXPORT_SYMBOL(videomode_to_omap_video_timings);
290
291void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
292 struct videomode *vm)
293{
294 memset(vm, 0, sizeof(*vm));
295
296 vm->pixelclock = ovt->pixelclock;
297
298 vm->hactive = ovt->x_res;
299 vm->hback_porch = ovt->hbp;
300 vm->hfront_porch = ovt->hfp;
301 vm->hsync_len = ovt->hsw;
302 vm->vactive = ovt->y_res;
303 vm->vback_porch = ovt->vbp;
304 vm->vfront_porch = ovt->vfp;
305 vm->vsync_len = ovt->vsw;
306
307 if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
308 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
309 else
310 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;
311
312 if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
313 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
314 else
315 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;
316
317 if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
318 vm->flags |= DISPLAY_FLAGS_DE_HIGH;
319 else
320 vm->flags |= DISPLAY_FLAGS_DE_LOW;
321
322 if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
323 vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
324 else
325 vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
326}
327EXPORT_SYMBOL(omap_video_timings_to_videomode);
328
