linux-kernel - Re: [PATCH v4] drm/msm/dp: fix the intf

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Message-ID: <3cnujrkkcui34wg3jrfoezradc5itm2paw5mgkii2d2snlac2a@lerj4ldbvf4l>
Date: Wed, 26 Nov 2025 02:36:05 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Yongxing Mou <yongxing.mou@....qualcomm.com>
Cc: Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Abhinav Kumar <quic_abhinavk@...cinc.com>
Subject: Re: [PATCH v4] drm/msm/dp: fix the intf_type of MST interfaces

On Tue, Nov 25, 2025 at 04:22:12PM +0800, Yongxing Mou wrote:
> From: Abhinav Kumar <quic_abhinavk@...cinc.com>
> 
> Interface type of MST interfaces is currently INTF_NONE. Update this to
> INTF_DP. And correct the intf_6 intr_underrun/intr_vsync index for
> dpu_8_4_sa8775p.
> 
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> Signed-off-by: Yongxing Mou <yongxing.mou@....qualcomm.com>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
> This patch was split out from the MST V3 patch series:
> https://lore.kernel.org/all/20250825-msm-dp-mst-v3-0-01faacfcdedd@oss.qualcomm.com/
> ---
> Changes in v4:
> - Splite chagne out from the MST V3 series.

Why?

> - Link to v3: https://lore.kernel.org/all/20250825-msm-dp-mst-v3-37-01faacfcdedd@oss.qualcomm.com/
> 
> Changes in v3:
> - Fix through the whole catalog
> - Link to v2: https://lore.kernel.org/all/20250609-msm-dp-mst-v2-37-a54d8902a23d@quicinc.com/
> 
> Changes in v2:
> - Change the patch order in the series.
> - Link to v1: https://lore.kernel.org/all/20241205-dp_mst-v1-3-f8618d42a99a@quicinc.com/
> ---
>  drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h |  6 +++---
>  drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_4_sa8775p.h  | 12 ++++++------
>  drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_2_x1e80100.h |  6 +++---
>  3 files changed, 12 insertions(+), 12 deletions(-)
> 
> @@ -363,15 +363,15 @@ static const struct dpu_intf_cfg sa8775p_intf[] = {
>  	}, {
>  		.name = "intf_6", .id = INTF_6,
>  		.base = 0x3A000, .len = 0x280,
> -		.type = INTF_NONE,
> +		.type = INTF_DP,
>  		.controller_id = MSM_DP_CONTROLLER_0,	/* pair with intf_0 for DP MST */
>  		.prog_fetch_lines_worst_case = 24,
> -		.intr_underrun = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 17),
> -		.intr_vsync = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 16),
> +		.intr_underrun = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 16),
> +		.intr_vsync = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 17),

This is a separate fix, it should be a separate patch.

-- 
With best wishes
Dmitry