diff options
| author | Chris Wilson <[email protected]> | 2012-03-22 15:00:50 +0000 |
|---|---|---|
| committer | Daniel Vetter <[email protected]> | 2012-04-01 12:23:53 +0200 |
| commit | f47166d2b0001fcb752b40c5a2d4db986dfbea68 (patch) | |
| tree | 439aa744068a97f0ab402e8e91b8d524ff0d3b8e /net/lapb/lapb_timer.c | |
| parent | dd775ae2549217d3ae09363e3edb305d0fa19928 (diff) | |
drm/i915: Sanitize BIOS debugging bits from PIPECONF
Quoting the BSpec from time immemorial:
PIPEACONF, bits 28:27: Frame Start Delay (Debug)
Used to delay the frame start signal that is sent to the display planes.
Care must be taken to insure that there are enough lines during VBLANK
to support this setting.
An instance of the BIOS leaving these bits set was found in the wild,
where it caused our modesetting to go all squiffy and skewiff.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=47271
Reported-and-tested-by: Eva Wang <[email protected]>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=43012
Reported-and-tested-by: Carl Richell <[email protected]>
Cc: [email protected]
Signed-off-by: Chris Wilson <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions