linux-kernel - Re: [PATCH 0/2] drm/msm/a2xx: enable Adreno A225 support

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Message-ID: <heoefnaboftvn5u5ueicmtsqyfr4rpwna37rw3h3dulq7q5m3l@46s7l3fsxzbp>
Date: Fri, 21 Nov 2025 22:38:26 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Rob Clark <robin.clark@....qualcomm.com>, Sean Paul <sean@...rly.run>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Jonathan Marek <jonathan@...ek.ca>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] drm/msm/a2xx: enable Adreno A225 support

On Fri, Nov 21, 2025 at 08:36:08PM +0100, Konrad Dybcio wrote:
> On 11/21/25 5:13 PM, Dmitry Baryshkov wrote:
> > Add two remaining bits necessary to enable Adreno A225 support.
> > Note, this wasn't tested on the actual hardware and is purely based on
> > the old KGSL driver from msm-3.0. For example, running on MSM8960 might
> > require adjusting PM_OVERRIDE[12] registers.
> > 
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> > ---
> > Dmitry Baryshkov (2):
> >       drm/msm/a2xx: fix pixel shader start on A225
> >       drm/msm/a2xx: add A225 entry to catalog
> 
> Not sure that's enough, a2xx_drawctxt_draw_workaround looks scary
> 
> https://github.com/AdrianDC/android_kernel_sony_msm8960t/blob/lineage-18.1/drivers/gpu/msm/adreno_a2xx.c

Yep. msm-3.0 does some other things for a200 / a220, which we don't
perform. I don't know which parts actually apply to our stack and which
don't.

-- 
With best wishes
Dmitry