[igt-dev] [PATCH i-g-t v8 0/4] Add support for testing writeback connectors

[Maxime Ripard]

Hi,

On Thu, Apr 23, 2020 at 09:26:01PM -0400, Rodrigo Siqueira wrote:
> A couple of months ago, I updated and re-submitted a patchset made by
> Brian Starkey and Liviu Dudau for adding a writeback connectors test to
> IGT. It is important to highlight that DRM already have writeback
> connectors support, which is a way to expose in DRM the hardware
> functionality from display engines that allows writing back into memory
> the result of the DE's composition of supported planes.
> 
> After I resubmitted the patchset, Simon Ser provides a long and detailed
> review for all of the patches (thanks Simon). Additionally, Maxime
> Ripard tested the previous series in an ARM32 architecture and provided
> his feedback for making this patchset portable (thanks Maxime). I
> finally had time to go through all the details and prepare this new
> version. Follows some notes:
> 
> 1. Patchset author
> 
> Brian Starkey is the original author of this patchset, and I'm just
> trying to upstream his changes. Note that during this patch submission,
> the mail server from google going to overwrite Brian's mail by mine;
> this happens on the mail server side for avoiding malicious users to
> send emails as someone else. Note that I could spend time figuring out
> how to fix it, but I think this is not worth since I can fix it during
> the merge process (if it got accepted).
> 
> 2. Drop the clone commits from the series
> 
> After Simon's review, we decided to drop the last two patches of the
> original series since it was related to cloning output, and VKMS does
> not support it yet. However, after we finish with this series, I can try
> to take a look at this feature or maybe propose it as a GSoC/Outreachy
> project.
> 
> Most of the changes happened in the second patch.
> 
> 3. Cross-platform improvements

I just tested it on top of current master (d095827a) on an RPi running in
32bits, it works like a charm.

Tested-by: Maxime Ripard <mripard at kernel.org>

Thanks!
Maxime
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