Re: [PATCH] drm/mediatek: Ensure the cursor plane is on top of other overlays

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Hi, Sean:

On Fri, 2020-01-31 at 11:27 +0800, CK Hu wrote:
> Hi, Sean:
> 
> On Thu, 2020-01-30 at 14:24 -0500, Sean Paul wrote:
> > From: Sean Paul <seanpaul@xxxxxxxxxxxx>
> > 
> > Currently the cursor is placed on the first overlay plane, which means
> > it will be at the bottom of the stack when the hw does the compositing
> > with anything other than primary plane. Since mtk doesn't support plane
> > zpos, change the cursor location to the top-most plane.
> > 
> 
> Reviewed-by: CK Hu <ck.hu@xxxxxxxxxxxx>

Applied to mediatek-drm-fixes-5.6 [1], thanks.

[1]
https://github.com/ckhu-mediatek/linux.git-tags/commits/mediatek-drm-fixes-5.6

Regards,
CK

> 
> > Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 8 +++++---
> >  1 file changed, 5 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > index 0dfcd1787e651..4ac76b9613926 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > @@ -689,11 +689,12 @@ static int mtk_drm_crtc_num_comp_planes(struct mtk_drm_crtc *mtk_crtc,
> >  }
> >  
> >  static inline
> > -enum drm_plane_type mtk_drm_crtc_plane_type(unsigned int plane_idx)
> > +enum drm_plane_type mtk_drm_crtc_plane_type(unsigned int plane_idx,
> > +					    unsigned int num_planes)
> >  {
> >  	if (plane_idx == 0)
> >  		return DRM_PLANE_TYPE_PRIMARY;
> > -	else if (plane_idx == 1)
> > +	else if (plane_idx == (num_planes - 1))
> >  		return DRM_PLANE_TYPE_CURSOR;
> >  	else
> >  		return DRM_PLANE_TYPE_OVERLAY;
> > @@ -712,7 +713,8 @@ static int mtk_drm_crtc_init_comp_planes(struct drm_device *drm_dev,
> >  		ret = mtk_plane_init(drm_dev,
> >  				&mtk_crtc->planes[mtk_crtc->layer_nr],
> >  				BIT(pipe),
> > -				mtk_drm_crtc_plane_type(mtk_crtc->layer_nr),
> > +				mtk_drm_crtc_plane_type(mtk_crtc->layer_nr,
> > +							num_planes),
> >  				mtk_ddp_comp_supported_rotations(comp));
> >  		if (ret)
> >  			return ret;
> 

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