linux-kernel - Re: [PATCH v1 0/8] drm/ci: Add support for GPU and display testing

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Date: Wed, 10 Jan 2024 16:17:23 +0530
From: Vignesh Raman <vignesh.raman@...labora.com>
To: Daniel Stone <daniel@...ishbar.org>
Cc: Helen Koike <helen.koike@...labora.com>, Dave Airlie <airlied@...il.com>,
 Sima Vetter <daniel@...ll.ch>, Daniel Stone <daniels@...labora.com>,
 Emma Anholt <emma@...olt.net>,
 linux-rockchip <linux-rockchip@...ts.infradead.org>,
 guilherme.gallo@...labora.com, sergi.blanch.torne@...labora.com,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 dri-devel <dri-devel@...ts.freedesktop.org>,
 David Heidelberg <david.heidelberg@...labora.com>,
 Rob Clark <robdclark@...il.com>, linux-mediatek@...ts.infradead.org,
 linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH v1 0/8] drm/ci: Add support for GPU and display testing

Hi Daniel,

On 09/01/24 19:08, Daniel Stone wrote:
> Hi,
> 
> On Wed, 20 Dec 2023 at 12:11, Vignesh Raman <vignesh.raman@...labora.com> wrote:
>> Some ARM SOCs have a separate display controller and GPU, each with
>> different drivers. For mediatek mt8173, the GPU driver is powervr,
>> and the display driver is mediatek. In the case of mediatek mt8183,
>> the GPU driver is panfrost, and the display driver is mediatek.
>> With rockchip rk3288/rk3399, the GPU driver is panfrost, while the
>> display driver is rockchip. For amlogic meson, the GPU driver is
>> panfrost, and the display driver is meson.
>>
>> IGT tests run various tests with different xfails and can test both
>> GPU devices and KMS/display devices. Currently, in drm-ci for MediaTek,
>> Rockchip, and Amlogic Meson platforms, only the GPU driver is tested.
>> This leads to incomplete coverage since the display is never tested on
>> these platforms. This commit series adds support in drm-ci to run tests
>> for both GPU and display drivers for MediaTek, Rockchip, and Amlogic
>> Meson platforms.
> 
> Thanks a lot for these. The patches need to be squashed to be
> bisectable though. For example, patch #2 changes the MTK job names and
> adds more jobs, but the corresponding xfail updates only come in #7
> and #8. This means we have a span of a few patches where we don't have
> useful test results.
> 
> A better sequencing would be something like:
>    1. add ANX7625 config
>    2. refactor _existing_ MTK display jobs to use YAML includes, change
> the existing job name, and rename the existing xfail set, remove
> IGT_FORCE_DRIVER from the script since it's now set by the job
>    3. add MTK Panfrost+PVR GPU jobs with new xfails, add xfail entry to
> MAINTAINERS
>    4+5: same as 2+3 but for Amlogic
>    6+7: same as 2+3 but for Rockchip
> 
> Then the separate rename/update xfail commits just disappear, as does
> the removal of IGT_FORCE_DRIVER, because it's just done incrementally
> as part of the commits which change the related functionality. It's
> extremely important that every change can work standalone, instead of
> introducing intermediate breakage which is only fixed in later commits
> in the series.

Thank you for reviewing the patches. I agree, will follow this sequence 
and send a v2 version.

Regards,
Vignesh