From: lintao <lintao@rock-chips.com>
Date: Tue, 3 Mar 2015 13:31:10 +0000 (+0800)
Subject: mmc: rk_sdmmc: edmac limit FIFOTH when mburst exceed limitation
X-Git-Tag: firefly_0821_release~4263^2~27
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9420778cf0599ed804f490a45e64aa6ed14471e4;p=firefly-linux-kernel-4.4.55.git

mmc: rk_sdmmc: edmac limit FIFOTH when mburst exceed limitation

Signed-off-by: lintao <lintao@rock-chips.com>
---

diff --git a/drivers/mmc/host/rk_sdmmc.c b/drivers/mmc/host/rk_sdmmc.c
index aea1afa7b576..69c3711c899c 100755
--- a/drivers/mmc/host/rk_sdmmc.c
+++ b/drivers/mmc/host/rk_sdmmc.c
@@ -637,7 +637,13 @@ static void dw_mci_edmac_start_dma(struct dw_mci *host, unsigned int sg_len)
 	else
 		burst_limit = 16;
 
-	slave_config.dst_maxburst = (mburst > burst_limit) ? burst_limit : mburst;
+	if (mburst > burst_limit) {
+		mburst = burst_limit;
+		fifoth_val = SDMMC_SET_FIFOTH(mszs[3], mszs[3] - 1, (host->fifo_depth) / 2);
+		mci_writel(host, FIFOTH, fifoth_val);
+	}
+
+	slave_config.dst_maxburst = mburst;
 	slave_config.src_maxburst = slave_config.dst_maxburst;
 
 	if(host->data->flags & MMC_DATA_WRITE){