diff options
| author | Daniel Drake <dsd@laptop.org> | 2011-11-21 10:05:56 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 11:52:23 -0500 |
| commit | 47b52de3faa57f5849c71bdaee4cd041debcc1ff (patch) | |
| tree | 37bb8caebca83e54eed8d24830996e4bc705d8dc | |
| parent | ff17063daf7bcf76ee1b1cc59e20ae725affc555 (diff) | |
viafb: correct sync polarity for OLPC DCON
commit a32839696a8eef813a1aff604fbad9a32dff6c95 upstream.
While the OLPC display appears to be able to handle either positive
or negative sync, the Display Controller only recognises positive sync.
This brings viafb (for XO-1.5) in line with lxfb (for XO-1) and
fixes a recent regression where the XO-1.5 DCON could no longer be
frozen. Thanks to Florian Tobias Schandinat for helping identify
the fix.
Test case: from a vt,
echo 1 > /sys/devices/platform/dcon/freeze
should cause the current screen contents to freeze, rather than garbage being
displayed.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/video/via/share.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/video/via/share.h b/drivers/video/via/share.h index 61b0bd596b8..1603023e3aa 100644 --- a/drivers/video/via/share.h +++ b/drivers/video/via/share.h | |||
| @@ -557,8 +557,8 @@ | |||
| 557 | #define M1200X720_R60_VSP POSITIVE | 557 | #define M1200X720_R60_VSP POSITIVE |
| 558 | 558 | ||
| 559 | /* 1200x900@60 Sync Polarity (DCON) */ | 559 | /* 1200x900@60 Sync Polarity (DCON) */ |
| 560 | #define M1200X900_R60_HSP NEGATIVE | 560 | #define M1200X900_R60_HSP POSITIVE |
| 561 | #define M1200X900_R60_VSP NEGATIVE | 561 | #define M1200X900_R60_VSP POSITIVE |
| 562 | 562 | ||
| 563 | /* 1280x600@60 Sync Polarity (GTF Mode) */ | 563 | /* 1280x600@60 Sync Polarity (GTF Mode) */ |
| 564 | #define M1280x600_R60_HSP NEGATIVE | 564 | #define M1280x600_R60_HSP NEGATIVE |