On 06/09/17 13:09, Mika Kahola wrote:
On Tue, 2017-09-05 at 18:11 +0200, Daniel Vetter wrote:
On Tue, Sep 05, 2017 at 04:35:04PM +0300, Mika Kahola wrote:
It appears that we cannot trust scanline counters when MIPI/DSI
display is
connected. In CI system this appears as flickering errors that
randomly
appear in test cases. To avoid this flickering, let's just silence
atomic
update failure in case with DSI panel.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102403
Signed-off-by: Mika Kahola <mika.kahola@xxxxxxxxx>
This just changes a loud atomic failure to a silent atomic failure.
What
we instead need to do is actually fix the bug, not hide it.
BSpec has a notion that (PIPE_SCANLINE) that is "Not supported with
MIPI DSI."
That's why I thought it might be ok to silence the error as the
computation that we try to accomplish wouldn't work anyway. Maybe this
way we could remove DSI from being blackllisted.
I agree. If the HW can't do it, so what can we do here?
As long as this is well documented and the userspace knows about this
issue (if anything relies on this feature), then what else can we do?
With the relevant BSpec quotes added above the changes, I can give my:
Acked-by: Martin Peres <martin.peres@xxxxxxxxxxxxxxx>
I would however like to know if this breaks any feature the userspace
relies on.
Martin
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