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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>
This commit is contained in:
Archit Taneja 2012-11-07 11:45:03 +05:30 committed by Tomi Valkeinen
parent 5d501085d4
commit 1c031441a9
1 changed files with 8 additions and 3 deletions
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11
drivers/video/omap2/dss/dispc.c
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@ -2315,9 +2315,14 @@ static int dispc_ovl_calc_scaling(enum omap_plane plane,
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 ||