linux-kernel - Re: [PATCH 1/4] soc: qcom: ubwc: use no-uwbc config for MSM8917

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Message-ID: <5fd77c1c-ffb3-4413-929a-36437b170591@oss.qualcomm.com>
Date: Thu, 14 Aug 2025 11:23:47 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Rob Clark <robin.clark@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] soc: qcom: ubwc: use no-uwbc config for MSM8917

On 8/14/25 9:22 AM, Dmitry Baryshkov wrote:
> MSM8917 has MDSS 1.15 and Adreno 308, neither of which support UBWC.
> Change UBWC configuration to point out that UBWC is not supported on
> this platform.
> 
> Fixes: 1924272b9ce1 ("soc: qcom: Add UBWC config provider")
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
>  drivers/soc/qcom/ubwc_config.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/qcom/ubwc_config.c b/drivers/soc/qcom/ubwc_config.c
> index 1490a7f63767bba176e8e2e76891d7d2c424bb7f..5113c2902bf2ba3711bb14b35bbbb8a2b49b8cfe 100644
> --- a/drivers/soc/qcom/ubwc_config.c
> +++ b/drivers/soc/qcom/ubwc_config.c
> @@ -225,7 +225,7 @@ static const struct of_device_id qcom_ubwc_configs[] __maybe_unused = {
>  	{ .compatible = "qcom,apq8096", .data = &msm8998_data },
>  	{ .compatible = "qcom,msm8226", .data = &no_ubwc_data },
>  	{ .compatible = "qcom,msm8916", .data = &no_ubwc_data },
> -	{ .compatible = "qcom,msm8917", .data = &msm8937_data },
> +	{ .compatible = "qcom,msm8917", .data = &no_ubwc_data },

https://android.googlesource.com/kernel/msm/+/android-7.1.0_r0.2/arch/arm/boot/dts/qcom/msm8917-mdss.dtsi#93

&mdss_rotator {
	/delete-property/ qcom,mdss-has-ubwc;
};

argh! thanks for catching that

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad