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Message-ID: <bcae28fb-2adc-335b-9c12-badbcde77d90@quicinc.com>
Date:   Wed, 24 Aug 2022 10:13:59 -0700
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Subject: Re: [PATCH] drm/msm/dp: correct 1.62G link rate at
 dp_catalog_ctrl_config_msa()
Content-Language: en-US
To:     Kuogee Hsieh <quic_khsieh@quicinc.com>, <robdclark@gmail.com>,
        <sean@poorly.run>, <swboyd@chromium.org>, <dianders@chromium.org>,
        <vkoul@kernel.org>, <daniel@ffwll.ch>, <airlied@linux.ie>,
        <agross@kernel.org>, <dmitry.baryshkov@linaro.org>,
        <bjorn.andersson@linaro.org>
CC:     <quic_sbillaka@quicinc.com>, <freedreno@lists.freedesktop.org>,
        <dri-devel@lists.freedesktop.org>, <linux-arm-msm@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
References: <1661360356-21948-1-git-send-email-quic_khsieh@quicinc.com>
From:   Abhinav Kumar <quic_abhinavk@quicinc.com>
In-Reply-To: <1661360356-21948-1-git-send-email-quic_khsieh@quicinc.com>
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On 8/24/2022 9:59 AM, 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.
> 
> Fixes: 937f941ca06f  "drm/msm/dp: Use qmp phy for DP PLL and PHY"
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.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;