linux-kernel - Re: [PATCH v4 drm-dp 06/11] drm/hisilicon/hibmc: add dp mode valid check

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Message-ID: <uvujumkyv7kkynuepwfmth4oveeiuwb7x4dbcouebkgigbxkyr@woz7syyedvwk>
Date: Sun, 17 Aug 2025 18:18:00 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Yongbang Shi <shiyongbang@...wei.com>
Cc: xinliang.liu@...aro.org, tiantao6@...ilicon.com,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch,
        kong.kongxinwei@...ilicon.com, liangjian010@...wei.com,
        chenjianmin@...wei.com, fengsheng5@...wei.com, libaihan@...wei.com,
        shenjian15@...wei.com, shaojijie@...wei.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 drm-dp 06/11] drm/hisilicon/hibmc: add dp mode valid
 check

On Wed, Aug 13, 2025 at 05:42:33PM +0800, Yongbang Shi wrote:
> From: Baihan Li <libaihan@...wei.com>
> 
> If DP is connected, check the DP BW in mode_valid_ctx() to ensure
> that DP's link rate supports high-resolution data transmission.
> 
> Fixes: f9698f802e50 ("drm/hisilicon/hibmc: Restructuring the header dp_reg.h")
> Signed-off-by: Baihan Li <libaihan@...wei.com>
> Signed-off-by: Yongbang Shi <shiyongbang@...wei.com>
> ---
> ChangeLog:
> v3 -> v4:
>   - Remove the clock check, suggested by Dmitry Baryshkov.
>   - ( I'll add them in next series after redesigning this part)
> ---
>  .../gpu/drm/hisilicon/hibmc/dp/dp_config.h    |  2 ++
>  drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c    | 10 ++++++++++
>  drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h    |  2 ++
>  .../gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c    | 19 +++++++++++++++++++
>  4 files changed, 33 insertions(+)
> 

This more or less matches what (some of) the other drivers do.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>



-- 
With best wishes
Dmitry