sh_mobile_meram: Reset ICBs at unregistration time

When ICBs are unregistered and later reused they need to be reset to
avoid data corruption. Set the WBF, WF and RF bits to make sure ICBs get
reset properly.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c
index f63297099193..4d63490209cd 100644
--- a/drivers/video/sh_mobile_meram.c
+++ b/drivers/video/sh_mobile_meram.c
@@ -373,8 +373,10 @@ static void meram_deinit(struct sh_mobile_meram_priv *priv,
                         struct sh_mobile_meram_icb *icb)
 {
         /* disable ICB */
-        meram_write_icb(priv->base, icb->cache_icb,  MExxCTL, 0);
-        meram_write_icb(priv->base, icb->marker_icb, MExxCTL, 0);
+        meram_write_icb(priv->base, icb->cache_icb,  MExxCTL,
+                        MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF);
+        meram_write_icb(priv->base, icb->marker_icb, MExxCTL,
+                        MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF);
         icb->cache_unit = 0;
 }