fbdev: sh_mobile_meram: Fix MExxCTL register save on runtime PM suspend
To reset the ICB on resume the MExxCTL register needs to be OR'ed with
MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF, no set to that value. Fix this.
This fixes corruption at the bottom of the display when resuming from
runtime PM.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
diff --git a/drivers/video/sh_mobile_meram.c b/drivers/video/sh_mobile_meram.c
index 25a7118..7ba6dce 100644
--- a/drivers/video/sh_mobile_meram.c
+++ b/drivers/video/sh_mobile_meram.c
@@ -549,7 +549,7 @@
meram_read_icb(priv->base, j, icb_regs[k]);
/* Reset ICB on resume */
if (icb_regs[k] == MExxCTL)
- priv->icb_saved_regs[j * ICB_REGS_SIZE + k] =
+ priv->icb_saved_regs[j * ICB_REGS_SIZE + k] |=
MExxCTL_WBF | MExxCTL_WF | MExxCTL_RF;
}
}