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authorTomi Valkeinen <tomi.valkeinen@ti.com>2011-08-25 17:15:14 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>2011-09-30 16:17:23 +0300
commitdc891fab115380d9dfddcd252df45a941ff9cb4e (patch)
tree054f47c26b61bdad4a29d90ad1b2e23f99d5b7a0 /drivers/video/omap2/omapfb
parentfcca719430086fb64b3586582646579f8ffaf47c (diff)
OMAPFB: find best mode from edid
Use the new read_edid() function to get EDID information from the display (when available), and use the information to use a suitable mode at initialization time. Hot-plug is not yet supported, so the timings selected at init time will stay even if the monitor would be changed. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/omap2/omapfb')
-rw-r--r--drivers/video/omap2/omapfb/omapfb-main.c109
1 files changed, 99 insertions, 10 deletions
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index cd2cae8e96ff..c84cc2964154 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2276,6 +2276,87 @@ static int omapfb_parse_def_modes(struct omapfb2_device *fbdev)
return r;
}
+static void fb_videomode_to_omap_timings(struct fb_videomode *m,
+ struct omap_video_timings *t)
+{
+ t->x_res = m->xres;
+ t->y_res = m->yres;
+ t->pixel_clock = PICOS2KHZ(m->pixclock);
+ t->hsw = m->hsync_len;
+ t->hfp = m->right_margin;
+ t->hbp = m->left_margin;
+ t->vsw = m->vsync_len;
+ t->vfp = m->lower_margin;
+ t->vbp = m->upper_margin;
+}
+
+static int omapfb_find_best_mode(struct omap_dss_device *display,
+ struct omap_video_timings *timings)
+{
+ struct fb_monspecs *specs;
+ u8 *edid;
+ int r, i, best_xres, best_idx, len;
+
+ if (!display->driver->read_edid)
+ return -ENODEV;
+
+ len = 0x80 * 2;
+ edid = kmalloc(len, GFP_KERNEL);
+
+ r = display->driver->read_edid(display, edid, len);
+ if (r < 0)
+ goto err1;
+
+ specs = kzalloc(sizeof(*specs), GFP_KERNEL);
+
+ fb_edid_to_monspecs(edid, specs);
+
+ if (edid[126] > 0)
+ fb_edid_add_monspecs(edid + 0x80, specs);
+
+ best_xres = 0;
+ best_idx = -1;
+
+ for (i = 0; i < specs->modedb_len; ++i) {
+ struct fb_videomode *m;
+ struct omap_video_timings t;
+
+ m = &specs->modedb[i];
+
+ if (m->pixclock == 0)
+ continue;
+
+ /* skip repeated pixel modes */
+ if (m->xres == 2880 || m->xres == 1440)
+ continue;
+
+ fb_videomode_to_omap_timings(m, &t);
+
+ r = display->driver->check_timings(display, &t);
+ if (r == 0 && best_xres < m->xres) {
+ best_xres = m->xres;
+ best_idx = i;
+ }
+ }
+
+ if (best_xres == 0) {
+ r = -ENOENT;
+ goto err2;
+ }
+
+ fb_videomode_to_omap_timings(&specs->modedb[best_idx], timings);
+
+ r = 0;
+
+err2:
+ fb_destroy_modedb(specs->modedb);
+ kfree(specs);
+err1:
+ kfree(edid);
+
+ return r;
+}
+
static int omapfb_init_display(struct omapfb2_device *fbdev,
struct omap_dss_device *dssdev)
{
@@ -2404,9 +2485,27 @@ static int omapfb_probe(struct platform_device *pdev)
for (i = 0; i < fbdev->num_managers; i++)
fbdev->managers[i] = omap_dss_get_overlay_manager(i);
+ /* gfx overlay should be the default one. find a display
+ * connected to that, and use it as default display */
+ ovl = omap_dss_get_overlay(0);
+ if (ovl->manager && ovl->manager->device) {
+ def_display = ovl->manager->device;
+ } else {
+ dev_warn(&pdev->dev, "cannot find default display\n");
+ def_display = NULL;
+ }
+
if (def_mode && strlen(def_mode) > 0) {
if (omapfb_parse_def_modes(fbdev))
dev_warn(&pdev->dev, "cannot parse default modes\n");
+ } else if (def_display && def_display->driver->set_timings &&
+ def_display->driver->check_timings) {
+ struct omap_video_timings t;
+
+ r = omapfb_find_best_mode(def_display, &t);
+
+ if (r == 0)
+ def_display->driver->set_timings(def_display, &t);
}
r = omapfb_create_framebuffers(fbdev);
@@ -2423,16 +2522,6 @@ static int omapfb_probe(struct platform_device *pdev)
DBG("mgr->apply'ed\n");
- /* gfx overlay should be the default one. find a display
- * connected to that, and use it as default display */
- ovl = omap_dss_get_overlay(0);
- if (ovl->manager && ovl->manager->device) {
- def_display = ovl->manager->device;
- } else {
- dev_warn(&pdev->dev, "cannot find default display\n");
- def_display = NULL;
- }
-
if (def_display) {
r = omapfb_init_display(fbdev, def_display);
if (r) {

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