From: Benoit Parrot <bparrot@xxxxxx>
When dispc_wb_setup() calls dispc_ovl_setup_common() it does not
check for failure but instead keeps on partially setting up WB.
This causes the WB H/W to be partially initialized and yield
unexpected behavior.
Make sure return code is successful before proceeding.
Signed-off-by: Benoit Parrot <bparrot@xxxxxx>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
---
drivers/gpu/drm/omapdrm/dss/dispc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
index 679931e108f9..30bcee6580f5 100644
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -2678,6 +2678,8 @@ int dispc_wb_setup(const struct omap_dss_writeback_info *wi,
wi->height, wi->fourcc, wi->rotation, zorder,
wi->pre_mult_alpha, global_alpha, wi->rotation_type,
replication, vm, mem_to_mem);
+ if (r)
+ return r;
switch (wi->fourcc) {
case DRM_FORMAT_RGB565:
@@ -2718,7 +2720,7 @@ int dispc_wb_setup(const struct omap_dss_writeback_info *wi,
REG_FLD_MOD(DISPC_OVL_ATTRIBUTES2(plane), wbdelay, 7, 0);
}
- return r;
+ return 0;
}
static int dispc_ovl_enable(enum omap_plane_id plane, bool enable)
--
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