linux-kernel - Re: [PATCH 4/4] soc: qcom: use no-UBWC config for MSM8956/76

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Message-ID: <3muxbxytdezrptwrugu7yz4byycq6lteezrv22gs6abofhdst2@nnawschabj4q>
Date: Thu, 14 Aug 2025 14:31:57 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Rob Clark <robin.clark@....qualcomm.com>,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] soc: qcom: use no-UBWC config for MSM8956/76

On Thu, Aug 14, 2025 at 11:25:16AM +0200, Konrad Dybcio wrote:
> On 8/14/25 9:22 AM, Dmitry Baryshkov wrote:
> > Both MSM8956 and MSM8976 have MDSS 1.11 which doesn't support UBWC
> > (although they also have Adreno 510, which might support UBWC). Disable
> > UBWC support for those platforms.
> > 
> > Fixes: 1924272b9ce1 ("soc: qcom: Add UBWC config provider")
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> > ---
> 
> Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

I've posted this patch, but I'm a bit reluctant to merge it. These
targets should be able to use UBWC for GPU work, but then rewert to
linear for scanout buffers.

-- 
With best wishes
Dmitry