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sh_mobile_meram: Reset ICBs at unregistration time

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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>
This commit is contained in:
Laurent Pinchart 2011-08-31 13:00:52 +02:00 committed by Florian Tobias Schandinat
parent 3c8a63e22a
commit da6cf5125f
1 changed files with 4 additions and 2 deletions
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6
drivers/video/sh_mobile_meram.c
View file

@ -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;
}