linux-kernel - Re: [PATCH v3 05/11] drm/msm: Add support for SM8350

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Message-ID: <feda0561-1291-daa7-ea01-db5729a1a415@linaro.org>
Date:   Thu, 8 Dec 2022 01:50:51 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Robert Foss <robert.foss@...aro.org>, robdclark@...il.com,
        quic_abhinavk@...cinc.com, sean@...rly.run, airlied@...ux.ie,
        daniel@...ll.ch, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, agross@...nel.org,
        bjorn.andersson@...aro.org, konrad.dybcio@...ainline.org,
        quic_kalyant@...cinc.com, angelogioacchino.delregno@...ainline.org,
        loic.poulain@...aro.org, swboyd@...omium.org,
        quic_vpolimer@...cinc.com, vkoul@...nel.org, dianders@...omium.org,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jonathan Marek <jonathan@...ek.ca>,
        vinod.koul@...aro.org, quic_jesszhan@...cinc.com,
        andersson@...nel.org
Subject: Re: [PATCH v3 05/11] drm/msm: Add support for SM8350

On 05/12/2022 18:37, Robert Foss wrote:
> Add compatibles string, "qcom,sm8350-mdss", for the multimedia display
> subsystem unit used on Qualcomm SM8350 platform.
> 
> Signed-off-by: Robert Foss <robert.foss@...aro.org>
> ---
>   drivers/gpu/drm/msm/msm_mdss.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c
> index a2264fb517a1..39746b972cdd 100644
> --- a/drivers/gpu/drm/msm/msm_mdss.c
> +++ b/drivers/gpu/drm/msm/msm_mdss.c
> @@ -293,6 +293,9 @@ static int msm_mdss_enable(struct msm_mdss *msm_mdss)
>   		/* UBWC_2_0 */
>   		msm_mdss_setup_ubwc_dec_20(msm_mdss, 0x1e);
>   		break;
> +	case DPU_HW_VER_700:
> +		msm_mdss_setup_ubwc_dec_40(msm_mdss, UBWC_4_0, 6, 1, 1, 1);
> +		break;

Judging from the vendor kernel, the highest_rank_bit is 3, with usual 
todo for 2 for LP_DDR4.

>   	case DPU_HW_VER_720:
>   		msm_mdss_setup_ubwc_dec_40(msm_mdss, UBWC_3_0, 6, 1, 1, 1);
>   		break;
> @@ -530,6 +533,7 @@ static const struct of_device_id mdss_dt_match[] = {
>   	{ .compatible = "qcom,sc8180x-mdss" },
>   	{ .compatible = "qcom,sm8150-mdss" },
>   	{ .compatible = "qcom,sm8250-mdss" },
> +	{ .compatible = "qcom,sm8350-mdss" },
>   	{ .compatible = "qcom,sm8450-mdss" },
>   	{}
>   };

-- 
With best wishes
Dmitry