linux-kernel - Re: [v1 2/3] drm/msm/disp/dpu1: add dspps into reservation if there is a ctm request

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Date:   Wed, 1 Feb 2023 12:16:04 +0100
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     Kalyan Thota <quic_kalyant@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, robdclark@...omium.org,
        dianders@...omium.org, swboyd@...omium.org,
        quic_vpolimer@...cinc.com, dmitry.baryshkov@...aro.org,
        quic_abhinavk@...cinc.com
Subject: Re: [v1 2/3] drm/msm/disp/dpu1: add dspps into reservation if there
 is a ctm request

On 2023-01-30 07:21:31, Kalyan Thota wrote:
> Add dspp blocks into the topology for reservation, if there is a ctm
> request for that composition.

DSPP

> Changes in v1:
> - Minor nits (Dmitry)

This should go below the triple dashes, so that it /does not/ become
part of the patch/commit that is applied to the tree (where review
history is irrelevant as it can be searched for separately).

> Signed-off-by: Kalyan Thota <quic_kalyant@...cinc.com>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 9c6817b..3bd46b4 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -545,7 +545,8 @@ bool dpu_encoder_use_dsc_merge(struct drm_encoder *drm_enc)
>  static struct msm_display_topology dpu_encoder_get_topology(
>  			struct dpu_encoder_virt *dpu_enc,
>  			struct dpu_kms *dpu_kms,
> -			struct drm_display_mode *mode)
> +			struct drm_display_mode *mode,
> +			struct drm_crtc_state *crtc_state)
>  {
>  	struct msm_display_topology topology = {0};
>  	int i, intf_count = 0;
> @@ -573,11 +574,9 @@ static struct msm_display_topology dpu_encoder_get_topology(
>  	else
>  		topology.num_lm = (mode->hdisplay > MAX_HDISPLAY_SPLIT) ? 2 : 1;
>  
> -	if (dpu_enc->disp_info.intf_type == DRM_MODE_ENCODER_DSI) {
> -		if (dpu_kms->catalog->dspp &&
> -			(dpu_kms->catalog->dspp_count >= topology.num_lm))
> -			topology.num_dspp = topology.num_lm;
> -	}
> +	if (dpu_kms->catalog->dspp &&
> +	    crtc_state->ctm && (dpu_kms->catalog->dspp_count >= topology.num_lm))

Multiline-if-clause is typically indented with two tabs, not a half tab
(4 spaces).

Nit: swap the && here?  dspp and dspp_count are related, so check ctm
first or last but not in the middle - makes reading easier.

> +		topology.num_dspp = topology.num_lm;
>  
>  	topology.num_enc = 0;
>  	topology.num_intf = intf_count;
> @@ -643,7 +642,7 @@ static int dpu_encoder_virt_atomic_check(
>  		}
>  	}
>  
> -	topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode);
> +	topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode, crtc_state);
>  
>  	/* Reserve dynamic resources now. */
>  	if (!ret) {
> -- 
> 2.7.4
>