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.pinch...@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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