From 371e2081447ce2bc6a25c20b513b9ba33cf5769e Mon Sep 17 00:00:00 2001
From: "Janorkar, Mayuresh" <mayur@ti.com>
Date: Tue, 22 Feb 2011 07:35:13 -0600
Subject: [PATCH] OMAPFB: Adding a check for timings in set_def_mode
When omapfb.mode is passed through bootargs, when omapfb is setting mode,
it would check if timings passed are fine for panel attached to it.
It makes use of check_timing API provided by the panel.
In current code if check_timing API is not available for attached panel,
OMAPFB would return -EINVAL and BPP sent via bootargs will not have any effect.
In case of panels like TAAL panel, omapfb or any other driver should not be allowed to
change the timings. So bpps sent via bootargs will not have an effect.
In such case we can check only the x_res and y_res with the panels resolution
and if they match go ahead and set the bpps.
The bpp value sent via bootarg would have an effect.
Signed-off-by: Mayuresh Janorkar <mayur@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
drivers/video/omap2/omapfb/omapfb-main.c | 23 ++++++++++++++++-------
1 file changed, 16 insertions(+), 7 deletions(-)
diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index 4fdab8e9c4963..505ec66720490 100644
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -2090,7 +2090,7 @@ static int omapfb_set_def_mode(struct omapfb2_device *fbdev,
{
int r;
u8 bpp;
- struct omap_video_timings timings;
+ struct omap_video_timings timings, temp_timings;
r = omapfb_mode_to_timings(mode_str, &timings, &bpp);
if (r)
@@ -2100,14 +2100,23 @@ static int omapfb_set_def_mode(struct omapfb2_device *fbdev,
fbdev->bpp_overrides[fbdev->num_bpp_overrides].bpp = bpp;
++fbdev->num_bpp_overrides;
- if (!display->driver->check_timings || !display->driver->set_timings)
- return -EINVAL;
+ if (display->driver->check_timings) {
+ r = display->driver->check_timings(display, &timings);
+ if (r)
+ return r;
+ } else {
+ /* If check_timings is not present compare xres and yres */
+ if (display->driver->get_timings) {
+ display->driver->get_timings(display, &temp_timings);
- r = display->driver->check_timings(display, &timings);
- if (r)
- return r;
+ if (temp_timings.x_res != timings.x_res ||
+ temp_timings.y_res != timings.y_res)
+ return -EINVAL;
+ }
+ }
- display->driver->set_timings(display, &timings);
+ if (display->driver->set_timings)
+ display->driver->set_timings(display, &timings);
return 0;
}
--
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