[PATCH 0/3] drm: xlnx: zynqmp_dpsub: Fix plane handling

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Revision v1 of 2 in this series.

4 messages, 1 author, 2021-03-07 · open the first message on its own page

[PATCH 0/3] drm: xlnx: zynqmp_dpsub: Fix plane handling

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: 2021-03-07 04:09:07 

Hello,

This small patch series fixes two issues related to plane handling and
blending, and add global alpha support to the overlay plane. There isn't
much to say here, please refer to individual patches for details.

Laurent Pinchart (3):
  drm: xlnx: zynqmp_dpsub: Fix plane ordering
  drm: xlnx: zynqmp_dpsub: Fix graphics layer blending
  drm: xlnx: zynqmp_dpsub: Add global alpha support

 drivers/gpu/drm/xlnx/zynqmp_disp.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

-- 
Regards,

Laurent Pinchart


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[PATCH 1/3] drm: xlnx: zynqmp_dpsub: Fix plane ordering

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: 2021-03-07 04:09:07 

The DPSUB has a fixed plane order, with the video plane being at the
bottom and the graphics plane at the top. Register the video plane as
the primary plane, as a bottom overlay plane doesn't make sense.

While at it, add immutable zorder properties to the planes to report
this information to userspace.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/gpu/drm/xlnx/zynqmp_disp.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index 148add0ca1d6..6296f6d5acbc 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -1236,8 +1236,11 @@ static int zynqmp_disp_create_planes(struct zynqmp_disp *disp)
 		for (j = 0; j < layer->info->num_formats; ++j)
 			drm_formats[j] = layer->info->formats[j].drm_fmt;
 
-		/* Graphics layer is primary, and video layer is overlay. */
-		type = i == ZYNQMP_DISP_LAYER_GFX
+		/*
+		 * The video layer is at the bottom of the stack and the
+		 * graphics layer at the top.
+		 */
+		type = i == ZYNQMP_DISP_LAYER_VID
 		     ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
 		ret = drm_universal_plane_init(disp->drm, &layer->plane, 0,
 					       &zynqmp_disp_plane_funcs,
@@ -1249,6 +1252,8 @@ static int zynqmp_disp_create_planes(struct zynqmp_disp *disp)
 
 		drm_plane_helper_add(&layer->plane,
 				     &zynqmp_disp_plane_helper_funcs);
+
+		drm_plane_create_zpos_immutable_property(&layer->plane, i);
 	}
 
 	return 0;
@@ -1573,7 +1578,7 @@ static const struct drm_crtc_funcs zynqmp_disp_crtc_funcs = {
 
 static int zynqmp_disp_create_crtc(struct zynqmp_disp *disp)
 {
-	struct drm_plane *plane = &disp->layers[ZYNQMP_DISP_LAYER_GFX].plane;
+	struct drm_plane *plane = &disp->layers[ZYNQMP_DISP_LAYER_VID].plane;
 	int ret;
 
 	ret = drm_crtc_init_with_planes(disp->drm, &disp->crtc, plane,
-- 
Regards,

Laurent Pinchart


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[PATCH 3/3] drm: xlnx: zynqmp_dpsub: Add global alpha support

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: 2021-03-07 04:09:08 

The top (graphics) plane has a global alpha setting. Expose it through
the plane's alpha property.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/gpu/drm/xlnx/zynqmp_disp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index 4c23ffc75343..991dd6bebdc7 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -1173,7 +1173,7 @@ zynqmp_disp_plane_atomic_disable(struct drm_plane *plane,
 
 	if (layer->id == ZYNQMP_DISP_LAYER_GFX)
 		zynqmp_disp_blend_set_global_alpha(&layer->disp->blend, false,
-						   0);
+						   plane->state->alpha >> 8);
 }
 
 static void
@@ -1203,7 +1203,7 @@ zynqmp_disp_plane_atomic_update(struct drm_plane *plane,
 
 	if (layer->id == ZYNQMP_DISP_LAYER_GFX)
 		zynqmp_disp_blend_set_global_alpha(&layer->disp->blend, true,
-						   255);
+						   plane->state->alpha >> 8);
 
 	/* Enable or re-enable the plane is the format has changed. */
 	if (format_changed)
@@ -1262,6 +1262,8 @@ static int zynqmp_disp_create_planes(struct zynqmp_disp *disp)
 				     &zynqmp_disp_plane_helper_funcs);
 
 		drm_plane_create_zpos_immutable_property(&layer->plane, i);
+		if (type == DRM_PLANE_TYPE_OVERLAY)
+			drm_plane_create_alpha_property(&layer->plane);
 	}
 
 	return 0;
-- 
Regards,

Laurent Pinchart


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[PATCH 2/3] drm: xlnx: zynqmp_dpsub: Fix graphics layer blending

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: 2021-03-07 04:09:08 

To display the graphics layer, the global alpha needs to be enabled.
Enable it when the graphics plane is enabled (with full opacity), and
disable it otherwise.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/gpu/drm/xlnx/zynqmp_disp.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index 6296f6d5acbc..4c23ffc75343 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -1170,6 +1170,10 @@ zynqmp_disp_plane_atomic_disable(struct drm_plane *plane,
 		return;
 
 	zynqmp_disp_layer_disable(layer);
+
+	if (layer->id == ZYNQMP_DISP_LAYER_GFX)
+		zynqmp_disp_blend_set_global_alpha(&layer->disp->blend, false,
+						   0);
 }
 
 static void
@@ -1197,6 +1201,10 @@ zynqmp_disp_plane_atomic_update(struct drm_plane *plane,
 
 	zynqmp_disp_layer_update(layer, plane->state);
 
+	if (layer->id == ZYNQMP_DISP_LAYER_GFX)
+		zynqmp_disp_blend_set_global_alpha(&layer->disp->blend, true,
+						   255);
+
 	/* Enable or re-enable the plane is the format has changed. */
 	if (format_changed)
 		zynqmp_disp_layer_enable(layer);
@@ -1463,7 +1471,6 @@ zynqmp_disp_crtc_atomic_enable(struct drm_crtc *crtc,
 	zynqmp_disp_blend_set_output_format(&disp->blend,
 					    ZYNQMP_DPSUB_FORMAT_RGB);
 	zynqmp_disp_blend_set_bg_color(&disp->blend, 0, 0, 0);
-	zynqmp_disp_blend_set_global_alpha(&disp->blend, false, 0);
 
 	zynqmp_disp_enable(disp);
 
-- 
Regards,

Laurent Pinchart


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