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drm/imx: ipuv3-plane: disable local alpha for planes without alpha channel

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Without this patch, after enabling the overlay plane with an RGBA
framebuffer, switching to a framebuffer without alpha channel would
cause the plane to vanish, since the pixel local alpha is constant
zero in that case. Disable local alpha again when setting an opaque
framebuffer.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Philipp Zabel 2016-10-18 17:09:30 +02:00
parent 5fb57ab328
commit 86126748cd
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/imx/ipuv3-plane.c
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@ -437,6 +437,7 @@ static void ipu_plane_atomic_update(struct drm_plane *plane,
ipu_dp_set_global_alpha(ipu_plane->dp, false, 0, false);
break;
default:
ipu_dp_set_global_alpha(ipu_plane->dp, true, 0, true);
break;
}
}