drm/mediatek: Ensure the cursor plane is on top of other overlays
diff mbox series

Message ID 20200206065951.213862-1-evanbenn@google.com
State New
Headers show
Series
  • drm/mediatek: Ensure the cursor plane is on top of other overlays
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Commit Message

Evan Benn Feb. 6, 2020, 6:59 a.m. UTC
From: Sean Paul <seanpaul@chromium.org>

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.

Signed-off-by: Evan Benn <evanbenn@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 29 +++++++++++++++++--------
 1 file changed, 20 insertions(+), 9 deletions(-)

Comments

Evan Benn Feb. 6, 2020, 7:04 a.m. UTC | #1
Apologies if I have formatted this wrong / sent to the wrong place!

The patch posted had an issue, another place in the driver was
assuming planes[1] still referred to the cursor.
Now search for the cursor before sending (as the plane cannot be
hard-coded, some devices have different numbers of planes).

Thanks

Evan Benn


On Thu, Feb 6, 2020 at 6:00 PM <evanbenn@google.com> wrote:
>
> From: Sean Paul <seanpaul@chromium.org>
>
> 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.
>
> Signed-off-by: Evan Benn <evanbenn@chromium.org>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 29 +++++++++++++++++--------
>  1 file changed, 20 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 7b392d6c71cc..d4078c2089e0 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -658,10 +658,21 @@ static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
>
>  static int mtk_drm_crtc_init(struct drm_device *drm,
>                              struct mtk_drm_crtc *mtk_crtc,
> -                            struct drm_plane *primary,
> -                            struct drm_plane *cursor, unsigned int pipe)
> +                            unsigned int pipe)
>  {
> -       int ret;
> +       int i, ret;
> +
> +       struct drm_plane *primary = NULL;
> +       struct drm_plane *cursor = NULL;
> +
> +       for (i = 0; i < mtk_crtc->layer_nr; ++i) {
> +               if (!primary && mtk_crtc->planes[i].type ==
> +                               DRM_PLANE_TYPE_PRIMARY)
> +                       primary = &mtk_crtc->planes[i];
> +               if (!cursor && mtk_crtc->planes[i].type ==
> +                               DRM_PLANE_TYPE_CURSOR)
> +                       cursor = &mtk_crtc->planes[i];
> +       }
>
>         ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
>                                         &mtk_crtc_funcs, NULL);
> @@ -711,11 +722,12 @@ 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;
> @@ -734,7 +746,8 @@ 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;
> @@ -830,9 +843,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>                         return ret;
>         }
>
> -       ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
> -                               mtk_crtc->layer_nr > 1 ? &mtk_crtc->planes[1] :
> -                               NULL, pipe);
> +       ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
>         if (ret < 0)
>                 return ret;
>
> --
> 2.25.0.341.g760bfbb309-goog
>
CK Hu Feb. 6, 2020, 7:16 a.m. UTC | #2
Hi, Evan:

It looks like Sean's version has some problem. So this version is

Reviewed-by: CK Hu <ck.hu@mediatek.com>


On Thu, 2020-02-06 at 17:59 +1100, evanbenn@google.com wrote:
> From: Sean Paul <seanpaul@chromium.org>
> 
> 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.
> 
> Signed-off-by: Evan Benn <evanbenn@chromium.org>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 29 +++++++++++++++++--------
>  1 file changed, 20 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 7b392d6c71cc..d4078c2089e0 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -658,10 +658,21 @@ static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
>  
>  static int mtk_drm_crtc_init(struct drm_device *drm,
>  			     struct mtk_drm_crtc *mtk_crtc,
> -			     struct drm_plane *primary,
> -			     struct drm_plane *cursor, unsigned int pipe)
> +			     unsigned int pipe)
>  {
> -	int ret;
> +	int i, ret;
> +
> +	struct drm_plane *primary = NULL;
> +	struct drm_plane *cursor = NULL;
> +
> +	for (i = 0; i < mtk_crtc->layer_nr; ++i) {
> +		if (!primary && mtk_crtc->planes[i].type ==
> +				DRM_PLANE_TYPE_PRIMARY)
> +			primary = &mtk_crtc->planes[i];
> +		if (!cursor && mtk_crtc->planes[i].type ==
> +				DRM_PLANE_TYPE_CURSOR)
> +			cursor = &mtk_crtc->planes[i];
> +	}
>  
>  	ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
>  					&mtk_crtc_funcs, NULL);
> @@ -711,11 +722,12 @@ 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;
> @@ -734,7 +746,8 @@ 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;
> @@ -830,9 +843,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  			return ret;
>  	}
>  
> -	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
> -				mtk_crtc->layer_nr > 1 ? &mtk_crtc->planes[1] :
> -				NULL, pipe);
> +	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
>  	if (ret < 0)
>  		return ret;
>
Sean Paul Feb. 6, 2020, 2:01 p.m. UTC | #3
On Thu, Feb 06, 2020 at 05:59:51PM +1100, evanbenn@google.com wrote:
> From: Sean Paul <seanpaul@chromium.org>
> 
> 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.
> 
> Signed-off-by: Evan Benn <evanbenn@chromium.org>

Hi Evan,
Thanks for spotting the issue! I think this should probably be 2 patches, one to
fix crtc init and then the cursor patch on top of that. We generally try to only
do one thing per patch.

A few other nits below..

> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 29 +++++++++++++++++--------
>  1 file changed, 20 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 7b392d6c71cc..d4078c2089e0 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -658,10 +658,21 @@ static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
>  
>  static int mtk_drm_crtc_init(struct drm_device *drm,
>  			     struct mtk_drm_crtc *mtk_crtc,
> -			     struct drm_plane *primary,
> -			     struct drm_plane *cursor, unsigned int pipe)
> +			     unsigned int pipe)
>  {
> -	int ret;
> +	int i, ret;
> +

extra line

> +	struct drm_plane *primary = NULL;
> +	struct drm_plane *cursor = NULL;

These should be on top of the int declaration

> +
> +	for (i = 0; i < mtk_crtc->layer_nr; ++i) {

We don't really do pre-increment in kernel for loops

> +		if (!primary && mtk_crtc->planes[i].type ==
> +				DRM_PLANE_TYPE_PRIMARY)

Line breaks should be around '&&':

                if (!primary &&
                    mtk_crtc->planes[i].type == DRM_PLANE_TYPE_PRIMARY)

> +			primary = &mtk_crtc->planes[i];
> +		if (!cursor && mtk_crtc->planes[i].type ==

else if?

> +				DRM_PLANE_TYPE_CURSOR)
> +			cursor = &mtk_crtc->planes[i];


Since we can only have one primary and one cursor, the NULL checks on primary
and cursor are unnecessary, you can just blindly assign them when you hit a
plane of the right type. If the driver creates multiples the behavior is
undefined anyways.

> +	}
>  
>  	ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
>  					&mtk_crtc_funcs, NULL);
> @@ -711,11 +722,12 @@ 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;
> @@ -734,7 +746,8 @@ 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;
> @@ -830,9 +843,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  			return ret;
>  	}
>  
> -	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
> -				mtk_crtc->layer_nr > 1 ? &mtk_crtc->planes[1] :
> -				NULL, pipe);
> +	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
>  	if (ret < 0)
>  		return ret;
>  
> -- 
> 2.25.0.341.g760bfbb309-goog
>

Patch
diff mbox series

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 7b392d6c71cc..d4078c2089e0 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -658,10 +658,21 @@  static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
 
 static int mtk_drm_crtc_init(struct drm_device *drm,
 			     struct mtk_drm_crtc *mtk_crtc,
-			     struct drm_plane *primary,
-			     struct drm_plane *cursor, unsigned int pipe)
+			     unsigned int pipe)
 {
-	int ret;
+	int i, ret;
+
+	struct drm_plane *primary = NULL;
+	struct drm_plane *cursor = NULL;
+
+	for (i = 0; i < mtk_crtc->layer_nr; ++i) {
+		if (!primary && mtk_crtc->planes[i].type ==
+				DRM_PLANE_TYPE_PRIMARY)
+			primary = &mtk_crtc->planes[i];
+		if (!cursor && mtk_crtc->planes[i].type ==
+				DRM_PLANE_TYPE_CURSOR)
+			cursor = &mtk_crtc->planes[i];
+	}
 
 	ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
 					&mtk_crtc_funcs, NULL);
@@ -711,11 +722,12 @@  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;
@@ -734,7 +746,8 @@  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;
@@ -830,9 +843,7 @@  int mtk_drm_crtc_create(struct drm_device *drm_dev,
 			return ret;
 	}
 
-	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
-				mtk_crtc->layer_nr > 1 ? &mtk_crtc->planes[1] :
-				NULL, pipe);
+	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, pipe);
 	if (ret < 0)
 		return ret;