linux-kernel - Re: [PATCH v2 08/17] drm/msm/dpu: Drop unused poll_timeout_wr

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Date:   Tue, 18 Apr 2023 14:19:40 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Marijn Suijten <marijn.suijten@...ainline.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Adam Skladowski <a39.skl@...il.com>,
        Loic Poulain <loic.poulain@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Robert Foss <rfoss@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Rajesh Yadav <ryadav@...eaurora.org>,
        Jeykumar Sankaran <jsanka@...eaurora.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Chandan Uddaraju <chandanu@...eaurora.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Jordan Crouse <jordan@...micpenguin.net>,
        Archit Taneja <architt@...eaurora.org>,
        Sravanthi Kollukuduru <skolluku@...eaurora.org>
Subject: Re: [PATCH v2 08/17] drm/msm/dpu: Drop unused poll_timeout_wr_ptr
 PINGPONG callback



On 17.04.2023 22:21, Marijn Suijten wrote:
> This callback was migrated from downstream when DPU1 was first
> introduced to mainline, but never used by any component.  Drop it to
> save some lines and unnecessary confusion.
> 
> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 18 ------------------
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h |  6 ------
>  2 files changed, 24 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 0fcad9760b6f..b18efd640abd 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> @@ -144,23 +144,6 @@ static bool dpu_hw_pp_get_autorefresh_config(struct dpu_hw_pingpong *pp,
>  	return !!((val & BIT(31)) >> 31);
>  }
>  
> -static int dpu_hw_pp_poll_timeout_wr_ptr(struct dpu_hw_pingpong *pp,
> -		u32 timeout_us)
> -{
> -	struct dpu_hw_blk_reg_map *c;
> -	u32 val;
> -	int rc;
> -
> -	if (!pp)
> -		return -EINVAL;
> -
> -	c = &pp->hw;
> -	rc = readl_poll_timeout(c->blk_addr + PP_LINE_COUNT,
> -			val, (val & 0xffff) >= 1, 10, timeout_us);
> -
> -	return rc;
> -}
> -
>  static int dpu_hw_pp_enable_te(struct dpu_hw_pingpong *pp, bool enable)
>  {
>  	struct dpu_hw_blk_reg_map *c;
> @@ -280,7 +263,6 @@ static void _setup_pingpong_ops(struct dpu_hw_pingpong *c,
>  	c->ops.get_vsync_info = dpu_hw_pp_get_vsync_info;
>  	c->ops.setup_autorefresh = dpu_hw_pp_setup_autorefresh_config;
>  	c->ops.get_autorefresh = dpu_hw_pp_get_autorefresh_config;
> -	c->ops.poll_timeout_wr_ptr = dpu_hw_pp_poll_timeout_wr_ptr;
>  	c->ops.get_line_count = dpu_hw_pp_get_line_count;
>  	c->ops.setup_dsc = dpu_hw_pp_setup_dsc;
>  	c->ops.enable_dsc = dpu_hw_pp_dsc_enable;
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
> index c00223441d99..cf94b4ab603b 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
> @@ -107,12 +107,6 @@ struct dpu_hw_pingpong_ops {
>  	bool (*get_autorefresh)(struct dpu_hw_pingpong *pp,
>  				u32 *frame_count);
>  
> -	/**
> -	 * poll until write pointer transmission starts
> -	 * @Return: 0 on success, -ETIMEDOUT on timeout
> -	 */
> -	int (*poll_timeout_wr_ptr)(struct dpu_hw_pingpong *pp, u32 timeout_us);
> -
>  	/**
>  	 * Obtain current vertical line counter
>  	 */
>