[Intel-gfx] [PATCH] drm/i915: Don't check modeset state in the hw state force restore path

[Maarten Lankhorst]

Op 02-06-15 om 09:12 schreef Jani Nikula:
> On Mon, 01 Jun 2015, Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com> wrote:
>> Since the force restore logic will restore the CRTCs state one at a
>> time, it is possible that the state will be inconsistent until the whole
>> operation finishes. A call to intel_modeset_check_state() is done once
>> it's over, so don't check the state multiple times in between. This
>> regression was introduced in:
>>
>> commit 7f27126ea3db6ade886f18fd39caf0ff0cd1d37f
>> Author: Jesse Barnes <jbarnes at virtuousgeek.org>
>> Date:   Wed Nov 5 14:26:06 2014 -0800
>>
>>     drm/i915: factor out compute_config from __intel_set_mode v3
>>
>> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=94431
>> Cc: Jesse Barnes <jbarnes at virtuousgeek.org>
>> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>
>> ---
>>
>> Hi,
>>
>> This patch applies on top of nightly, but it is only relevant without
>> Maarten's "drm/i915: Convert to atomic, part 2" series, because of the
>> changes to the hw state read out and force restore logic.
>>
>> The regression exists since 3.19.
> Sooo, I think this should be applied to fixes, with cc: stable v3.19+,
> and IIUC Maarten's series makes this obsolete in dinq?
>
> Now we just need review... Maarten?
>
> BR,
> Jani.
Reviewed-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>

Looks good to me, but it will conflict with my own patch series. :(

~Maarten