[PATCH v2] drm/msm/dpu: Reapply CTM if modeset is needed

[Abhinav Kumar]

On 1/18/2023 8:41 AM, Jessica Zhang wrote:
> Add a !drm_atomic_crtc_needs_modeset() check to
> _dpu_crtc_setup_cp_blocks() so that CTM is reapplied if the LM/DSPP
> blocks were reallocated during modeset.

This was in addition to the suspend/resume case.

So CTM needs to be reapplied in case of suspend/resume OR LM/DSPP block 
reallocation.

To cover both of these we are adding the needs_modeset check

> 
> Changes in V2:
> - Fixed commit message
> 
> Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/23
> Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> index 13ce321283ff..aa120a230222 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> @@ -748,7 +748,7 @@ static void _dpu_crtc_setup_cp_blocks(struct drm_crtc *crtc)
>   	int i;
>   
>   
> -	if (!state->color_mgmt_changed)
> +	if (!state->color_mgmt_changed && !drm_atomic_crtc_needs_modeset(state))
>   		return;
>   
>   	for (i = 0; i < cstate->num_mixers; i++) {