Re: [PATCH v4 3/4] drm/msm/dpu: avoid unnecessary check in DPU reservations

[Marijn Suijten]

On 2023-02-13 03:11:43, Kalyan Thota wrote:
> Return immediately on failure, this will make dpu reservations
> part look cleaner.
> 
> Signed-off-by: Kalyan Thota <quic_kalyant@xxxxxxxxxxx>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>

Reviewed-by: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx>

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 23 ++++++++++-------------
>  1 file changed, 10 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 46d2a5c..3920efd 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -636,25 +636,22 @@ static int dpu_encoder_virt_atomic_check(
>  		if (ret) {
>  			DPU_ERROR_ENC(dpu_enc,
>  					"mode unsupported, phys idx %d\n", i);
> -			break;
> +			return ret;
>  		}
>  	}
>  
>  	topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode, crtc_state);
>  
> -	/* Reserve dynamic resources now. */
> -	if (!ret) {
> -		/*
> -		 * Release and Allocate resources on every modeset
> -		 * Dont allocate when active is false.
> -		 */
> -		if (drm_atomic_crtc_needs_modeset(crtc_state)) {
> -			dpu_rm_release(global_state, drm_enc);
> +	/*
> +	 * Release and Allocate resources on every modeset
> +	 * Dont allocate when active is false.
> +	 */
> +	if (drm_atomic_crtc_needs_modeset(crtc_state)) {
> +		dpu_rm_release(global_state, drm_enc);
>  
> -			if (!crtc_state->active_changed || crtc_state->active)
> -				ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
> -						drm_enc, crtc_state, topology);
> -		}
> +		if (!crtc_state->active_changed || crtc_state->active)
> +			ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
> +					drm_enc, crtc_state, topology);
>  	}
>  
>  	trace_dpu_enc_atomic_check_flags(DRMID(drm_enc), adj_mode->flags);
> -- 
> 2.7.4
>