linux-kernel - Re: [PATCH v2] drm/vc4: Return -EBUSY if there's already a pending flip event.

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Message-ID: <87eg99yha2.fsf@eliezer.anholt.net>
Date:	Tue, 10 May 2016 10:06:13 -0700
From:	Eric Anholt <eric@...olt.net>
To:	Robert Foss <robert.foss@...labora.com>, daniel.vetter@...ll.ch,
	airlied@...ux.ie, aniel.vetter@...ll.ch, fengguang.wu@...el.com,
	maarten.lankhorst@...ux.intel.com, julia.lawall@...6.fr,
	alexander.deucher@....com, daniels@...labora.com,
	derekf@....samsung.com, varadgautam@...il.com
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/vc4: Return -EBUSY if there's already a pending flip event.

Robert Foss <robert.foss@...labora.com> writes:

> On 2016-05-03 03:22 PM, Eric Anholt wrote:
>> robert.foss@...labora.com writes:
>>
>>> From: Robert Foss <robert.foss@...labora.com>
>>>
>>> As per the documentation in drm_crtc.h, atomic_commit should return
>>> -EBUSY if an asycnhronous update is requested and there is an earlier
>>> update pending.
>>>
>>> Note: docs cited here are drm_crtc.h, and the whole quote is:
>>>
>>>      *  - -EBUSY, if an asynchronous updated is requested and there is
>>>      *    an earlier updated pending. Drivers are allowed to support a queue
>>>      *    of outstanding updates, but currently no driver supports that.
>>>      *    Note that drivers must wait for preceding updates to complete if a
>>>      *    synchronous update is requested, they are not allowed to fail the
>>>      *    commit in that case.
>>>
>>> Signed-off-by: Robert Foss <robert.foss@...labora.com>
>>
>> This looks good to me.  Let's give it a few days on the list for any
>> other KMS folks to catch anything.
>>
>
> I haven't seen any further feedback regarding this patch.
> Does anyone have objections to it being merged?

I merged it to drm-vc4-next last night, actually :)

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