linux-kernel - Re: [PATCH 03/17] drm/msm/adreno: Common-ize PIPE definitions

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Message-ID: <CACSVV011=_szCPbdm6YA8aJjm76r_BZP9QFeOzcAGCvqUUTebg@mail.gmail.com>
Date: Tue, 30 Sep 2025 00:25:55 -0700
From: Rob Clark <rob.clark@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Akhil P Oommen <akhilpo@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Sean Paul <sean@...rly.run>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Jonathan Marek <jonathan@...ek.ca>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux.dev, devicetree@...r.kernel.org
Subject: Re: [PATCH 03/17] drm/msm/adreno: Common-ize PIPE definitions

On Tue, Sep 30, 2025 at 12:05 AM Dmitry Baryshkov
<dmitry.baryshkov@....qualcomm.com> wrote:
>
> On Tue, Sep 30, 2025 at 11:18:08AM +0530, Akhil P Oommen wrote:
> > PIPE enum definitions are backward compatible. So move its definition
> > to adreno_common.xml.
>
> What do you mean here by 'backward compatible'. Are they going to be
> used on a6xx? a5xx? If not, then why do we need to move them?

Newer gen's introduce pipe enums which do not exist on older gens, but
the numeric values do not conflict.  Ie. each gen is a superset of the
previous.

BR,
-R

> >
> > Signed-off-by: Akhil P Oommen <akhilpo@....qualcomm.com>
> > ---
> >  drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h        |  10 +-
> >  .../gpu/drm/msm/adreno/adreno_gen7_0_0_snapshot.h  | 412 +++++++++---------
> >  .../gpu/drm/msm/adreno/adreno_gen7_2_0_snapshot.h  | 324 +++++++--------
> >  .../gpu/drm/msm/adreno/adreno_gen7_9_0_snapshot.h  | 462 ++++++++++-----------
> >  drivers/gpu/drm/msm/registers/adreno/a6xx.xml      |   4 +-
> >  .../gpu/drm/msm/registers/adreno/a7xx_enums.xml    |   7 -
> >  .../gpu/drm/msm/registers/adreno/adreno_common.xml |  11 +
> >  7 files changed, 617 insertions(+), 613 deletions(-)
> >
>
> --
> With best wishes
> Dmitry