[Intel-gfx] [PATCH 2/2] drm/i915: Render decompression support for Gen9 and above

Smith, Gary K gary.k.smith at intel.com
Mon Mar 21 12:20:55 UTC 2016


What are the objections to this change?


-----Original Message-----
From: Daniel Stone [mailto:daniel at fooishbar.org] 
Sent: Friday, March 18, 2016 5:05 PM
To: Kannan, Vandana <vandana.kannan at intel.com>
Cc: intel-gfx <intel-gfx at lists.freedesktop.org>; Smith, Gary K <gary.k.smith at intel.com>; Daniel Vetter <daniel at ffwll.ch>
Subject: Re: [PATCH 2/2] drm/i915: Render decompression support for Gen9 and above

Hi Vandana,

On 18 March 2016 at 16:50, Vandana Kannan <vandana.kannan at intel.com> wrote:
> The reason for using a plane property instead of fb modifier:- In 
> Android, OGL passes a render compressed buffer to hardware composer 
> (HWC), which would then request a flip on that buffer after checking 
> if the target can support render compressed buffer. For example, only 
> planes 1 and 2 on pipes 1 and 2 can support RC. In case the target 
> cannot support it, HWC will revert back to OGL requesting for uncompressed buffer.

I still don't believe we can support this in non-Android userspace, so I don't have any other comment on this patch.

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