mmc: dw_mmc: set fixed burst in BMOD register
This patch uses the fixed burst bit when using an internal DMA controller.
I found increased performance with IDMAC when this bit is set.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 5a61406..87e1f57 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -316,7 +316,7 @@
/* Stop the IDMAC running */
temp = mci_readl(host, BMOD);
- temp &= ~SDMMC_IDMAC_ENABLE;
+ temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB);
mci_writel(host, BMOD, temp);
}
@@ -385,7 +385,7 @@
/* Enable the IDMAC */
temp = mci_readl(host, BMOD);
- temp |= SDMMC_IDMAC_ENABLE;
+ temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB;
mci_writel(host, BMOD, temp);
/* Start it running */