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[v2,1/8] sh_mobile_meram: Reset ICBs at unregistration time

Message ID 1314788459-31791-2-git-send-email-laurent.pinchart@ideasonboard.com (mailing list archive)
State New, archived
Headers show

Commit Message

Laurent Pinchart Aug. 31, 2011, 11 a.m. UTC
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>
---
 drivers/video/sh_mobile_meram.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c
index f632970..4d63490 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;
 }