For the overlay plane scanning out a framebuffer with an alpha component,
enable the DP local alpha feature on the partial plane.
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
drivers/staging/imx-drm/ipuv3-plane.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/imx-drm/ipuv3-plane.c
b/drivers/staging/imx-drm/ipuv3-plane.c
index 697aad2..c293917 100644
--- a/drivers/staging/imx-drm/ipuv3-plane.c
+++ b/drivers/staging/imx-drm/ipuv3-plane.c
@@ -148,14 +148,22 @@ int ipu_plane_mode_set(struct ipu_plane *ipu_plane,
struct drm_crtc *crtc,
ret);
return ret;
}
- ipu_dp_set_global_alpha(ipu_plane->dp, 1, 0, 1);
+ ipu_dp_set_global_alpha(ipu_plane->dp, true, 0, true);
break;
case IPU_DP_FLOW_SYNC_FG:
ipu_dp_setup_channel(ipu_plane->dp,
ipu_drm_fourcc_to_colorspace(fb->pixel_format),
IPUV3_COLORSPACE_UNKNOWN);
ipu_dp_set_window_pos(ipu_plane->dp, crtc_x, crtc_y);
- break;
+ /* Enable local alpha on partial plane */
+ switch (fb->pixel_format) {
+ case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_ABGR8888:
+ ipu_dp_set_global_alpha(ipu_plane->dp, false, 0, false);
+ break;
+ default:
+ break;
+ }
}
ret = ipu_dmfc_init_channel(ipu_plane->dmfc, crtc_w);
--
2.1.0
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