OMAPDSS: DISPC: Don't allow predecimation for writeback
Since writeback writes to a buffer instead of reading from one, predecimation
doesn't make sense for it. Configure the width and height predecimation limits
to 1 if the plane is writeback.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index 36ecb91..34ada45 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -2315,9 +2315,14 @@
if ((caps & OMAP_DSS_OVL_CAP_SCALE) == 0)
return -EINVAL;
- *x_predecim = max_decim_limit;
- *y_predecim = (rotation_type == OMAP_DSS_ROT_TILER &&
- dss_has_feature(FEAT_BURST_2D)) ? 2 : max_decim_limit;
+ if (plane == OMAP_DSS_WB) {
+ *x_predecim = *y_predecim = 1;
+ } else {
+ *x_predecim = max_decim_limit;
+ *y_predecim = (rotation_type == OMAP_DSS_ROT_TILER &&
+ dss_has_feature(FEAT_BURST_2D)) ?
+ 2 : max_decim_limit;
+ }
if (color_mode == OMAP_DSS_COLOR_CLUT1 ||
color_mode == OMAP_DSS_COLOR_CLUT2 ||