[PATCH 1/3] drm/msm/dpu: move intf and wb assignment to dpu_encoder_setup_display()

[Dmitry Baryshkov]

On 14/06/2022 22:32, Abhinav Kumar wrote:
> intf and wb resources are not dependent on the rm global
> state so need not be allocated during dpu_encoder_virt_atomic_mode_set().
> 
> Move the allocation of intf and wb resources to dpu_encoder_setup_display()
> so that we can utilize the hw caps even during atomic_check() phase.
> 
> Since dpu_encoder_setup_display() already has protection against
> setting invalid intf_idx and wb_idx, these checks can now
> be dropped as well.
> 
> Fixes: e02a559a720f ("make changes to dpu_encoder to support virtual encoder")
> Signed-off-by: Abhinav Kumar <quic_abhinavk at quicinc.com>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 25 +++++++------------------
>   1 file changed, 7 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 3a462e327e0e..e991d4ba8a40 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -1048,24 +1048,6 @@ static void dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc,
>   		phys->hw_pp = dpu_enc->hw_pp[i];
>   		phys->hw_ctl = to_dpu_hw_ctl(hw_ctl[i]);
>   
> -		if (phys->intf_idx >= INTF_0 && phys->intf_idx < INTF_MAX)
> -			phys->hw_intf = dpu_rm_get_intf(&dpu_kms->rm, phys->intf_idx);
> -
> -		if (phys->wb_idx >= WB_0 && phys->wb_idx < WB_MAX)
> -			phys->hw_wb = dpu_rm_get_wb(&dpu_kms->rm, phys->wb_idx);
> -
> -		if (!phys->hw_intf && !phys->hw_wb) {
> -			DPU_ERROR_ENC(dpu_enc,
> -				      "no intf or wb block assigned at idx: %d\n", i);
> -			return;
> -		}
> -
> -		if (phys->hw_intf && phys->hw_wb) {
> -			DPU_ERROR_ENC(dpu_enc,
> -					"invalid phys both intf and wb block at idx: %d\n", i);
> -			return;
> -		}

Please retain these checks in dpu_encoder_setup_display().
It checks that we really have got the intf or wb. For example one might 
have specified the INTF that leads to INTF_NONE interface. Or 
non-existing/not supported WB.

> -
>   		phys->cached_mode = crtc_state->adjusted_mode;
>   		if (phys->ops.atomic_mode_set)
>   			phys->ops.atomic_mode_set(phys, crtc_state, conn_state);
> @@ -2293,7 +2275,14 @@ static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc,
>   		struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
>   		atomic_set(&phys->vsync_cnt, 0);
>   		atomic_set(&phys->underrun_cnt, 0);
> +
> +		if (phys->intf_idx >= INTF_0 && phys->intf_idx < INTF_MAX)
> +			phys->hw_intf = dpu_rm_get_intf(&dpu_kms->rm, phys->intf_idx);
> +
> +		if (phys->wb_idx >= WB_0 && phys->wb_idx < WB_MAX)
> +			phys->hw_wb = dpu_rm_get_wb(&dpu_kms->rm, phys->wb_idx);
>   	}
> +
>   	mutex_unlock(&dpu_enc->enc_lock);
>   
>   	return ret;


-- 
With best wishes
Dmitry