linux-kernel - Re: [PATCH v10 3/8] drm/msm/dpu: Guard PINGPONG DSC ops behind DPU_PINGPONG

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Date:   Thu, 18 May 2023 03:29:16 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>,
        dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, dianders@...omium.org,
        vkoul@...nel.org, daniel@...ll.ch, airlied@...il.com,
        agross@...nel.org, andersson@...nel.org
Cc:     quic_abhinavk@...cinc.com, quic_jesszhan@...cinc.com,
        quic_sbillaka@...cinc.com, marijn.suijten@...ainline.org,
        freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v10 3/8] drm/msm/dpu: Guard PINGPONG DSC ops behind
 DPU_PINGPONG_DSC bit

On 18/05/2023 01:01, Kuogee Hsieh wrote:
> DPU < 7.0.0 has DPU_PINGPONG_DSC feature bit set to indicate it requires
> both dpu_hw_pp_setup_dsc() and dpu_hw_pp_dsc_{enable,disable}() to be
> executed to complete DSC configuration if DSC hardware block is present.
> Hence test DPU_PINGPONG_DSC feature bit and assign DSC related functions
> to the ops of PINGPONG block accordingly if DPU_PINGPONG_DSC bit is set.
> 
> Changes in v6:
> -- split patches, this patch has function handles DPU_PINGPONG_DSC bit
> 
> Changes in v9:
> -- the original code of assigning dsc related functions to the ops of pingpong

line too long

>     block without testing the DPU_PINGPONG_DSC feature bit was restored back
>     due to rebase error which defeat the purpose of this patch. Remove those
>     error code.
> 
> Changes in v10:
> -- change commit title
> -- correct texts at changes in v9
> 
> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Reviewed-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 9 ++++++---
>   1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> index 79e4576..437d9e6 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> @@ -291,9 +291,12 @@ static void _setup_pingpong_ops(struct dpu_hw_pingpong *c,
>   		c->ops.get_line_count = dpu_hw_pp_get_line_count;
>   		c->ops.disable_autorefresh = dpu_hw_pp_disable_autorefresh;
>   	}
> -	c->ops.setup_dsc = dpu_hw_pp_setup_dsc;
> -	c->ops.enable_dsc = dpu_hw_pp_dsc_enable;
> -	c->ops.disable_dsc = dpu_hw_pp_dsc_disable;
> +
> +	if (test_bit(DPU_PINGPONG_DSC, &features)) {
> +		c->ops.setup_dsc = dpu_hw_pp_setup_dsc;
> +		c->ops.enable_dsc = dpu_hw_pp_dsc_enable;
> +		c->ops.disable_dsc = dpu_hw_pp_dsc_disable;
> +	}
>   
>   	if (test_bit(DPU_PINGPONG_DITHER, &features))
>   		c->ops.setup_dither = dpu_hw_pp_setup_dither;

-- 
With best wishes
Dmitry