Re: [PATCH 1/8] drm/i915: Implement .get_format_info() hook for CCS

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Hi,

On 7 June 2017 at 16:33, Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
> On Wed, Jun 07, 2017 at 03:24:58PM +0100, Daniel Stone wrote:
>> On 7 June 2017 at 13:53, Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
>> > Anyways, I'll have to revisit the the offsets[] thing because people
>> > didn't like my original linear offset idea, and it doesn't match what
>> > userspace already does.
>>
>> I'm still really confused about this. Your patches implement a linear
>> byte offset. The last time it came up on IRC, all four of myself, Ben,
>> Jason, and you, agreed that linear byte offsets were the only thing
>> which made sense. The Mesa patchset that's been sent out a couple of
>> times and is now in Jason's hands use linear offsets. If everything
>> (kernel, Mesa) uses linear offsets, and everyone (the four of us in
>> the discussion) wants linear offsets - why revisit?
>
> Mesa doesn't use linear offsets. Or at least it didn't when I last
> looked.

It does, and I have correct CCS output (tested by displaying frames
either as Y_CCS, or as plain Y; correct display with the former and
visibly showing an incomplete primary surface for the latter) with the
last set of Mesa patches I submitted, using Weston. It's been that way
for a couple of months (?) now, since the stride handling was fixed
too.

Cheers,
Daniel
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