The patch titled
intelfb: fix a bug when changing video timing
has been removed from the -mm tree. Its filename was
intelfb-fix-a-bug-when-changing-video-timing.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: intelfb: fix a bug when changing video timing
From: Paul Menzel <paulepanter@xxxxxxxxxxxxxxxxxxxxx>
When changing video timing dynamically via fbset the screen sporadically
is rendered black.
With the attached fix which disables VCO prior to timing register change
the problem disappears.
I had a look at the Xserver register setup code. Here the VCO is
disabled in the same way [1].
This patch is taken from vga-sync-field version 0.0.11 [2][3].
[1] http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/tree/src/i830_=
driver.c
[2] http://lowbyte.de/vga-sync-fields/vga-sync-fields-0.0.11.tgz
[3] http://easy-vdr.de/git?p=frc.git/.git;a=commit;h=dcc3b863e5a663652587619c357bd20075af6896
2587619c357bd20075af6896
Signed-off-by: Thomas Hilber <sparkie@xxxxxxxxxx>
Signed-off-by: Paul Menzel <paulepanter@xxxxxxxxxxxxxxxxxxxxx>
Cc: Krzysztof Helt <krzysztof.h1@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/video/intelfb/intelfbdrv.c | 5 +++++
1 file changed, 5 insertions(+)
diff -puN drivers/video/intelfb/intelfbdrv.c~intelfb-fix-a-bug-when-changing-video-timing drivers/video/intelfb/intelfbdrv.c
--- a/drivers/video/intelfb/intelfbdrv.c~intelfb-fix-a-bug-when-changing-video-timing
+++ a/drivers/video/intelfb/intelfbdrv.c
@@ -1365,6 +1365,11 @@ static int intelfb_set_par(struct fb_inf
DBG_MSG("intelfb_set_par (%dx%d-%d)\n", info->var.xres,
info->var.yres, info->var.bits_per_pixel);
+ /*
+ * Disable VCO prior to timing register change.
+ */
+ OUTREG(DPLL_A, INREG(DPLL_A) & ~DPLL_VCO_ENABLE);
+
intelfb_blank(FB_BLANK_POWERDOWN, info);
if (ACCEL(dinfo, info))
_
Patches currently in -mm which might be from paulepanter@xxxxxxxxxxxxxxxxxxxxx are
origin.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
