linux-kernel - Re: [PATCH v3] drm/msm/dp: correct 1.62G link rate at dp_catalog_ctrl_config

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Date:   Fri, 26 Aug 2022 13:14:53 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, airlied@...ux.ie,
        agross@...nel.org, bjorn.andersson@...aro.org
Cc:     quic_abhinavk@...cinc.com, quic_sbillaka@...cinc.com,
        freedreno@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] drm/msm/dp: correct 1.62G link rate at
 dp_catalog_ctrl_config_msa()

On 24/08/2022 23:15, Kuogee Hsieh wrote:
> At current implementation there is an extra 0 at 1.62G link rate which cause
> no correct pixel_div selected for 1.62G link rate to calculate mvid and nvid.
> This patch delete the extra 0 to have mvid and nvid be calculated correctly.
> 
> Changes in v2:
> -- fix Fixes tag's text
> 
> Changes in v3:
> -- fix misspelling of "Reviewed-by"
> 
> Fixes: 937f941ca06f  ("drm/msm/dp: Use qmp phy for DP PLL and PHY")
> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> 

No extra empty lines between the tags please. I'll correct this manually 
while applying.

> Reviewed-by: Stephen Boyd <swboyd@...omium.org>
> Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>   drivers/gpu/drm/msm/dp/dp_catalog.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
> index 7257515..676279d 100644
> --- a/drivers/gpu/drm/msm/dp/dp_catalog.c
> +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
> @@ -431,7 +431,7 @@ void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog,
>   
>   	if (rate == link_rate_hbr3)
>   		pixel_div = 6;
> -	else if (rate == 1620000 || rate == 270000)
> +	else if (rate == 162000 || rate == 270000)
>   		pixel_div = 2;
>   	else if (rate == link_rate_hbr2)
>   		pixel_div = 4;

-- 
With best wishes
Dmitry