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Commit a5289a43 authored by Jaehoon Chung's avatar Jaehoon Chung Committed by Chris Ball
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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: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent cf5e23e1

drivers/mmc/host/dw_mmc.c

+2 −2
Original line number Original line Diff line number Diff line
@@ -316,7 +316,7 @@ static void dw_mci_idmac_stop_dma(struct dw_mci *host) 




	/* Stop the IDMAC running */

	/* Stop the IDMAC running */

	temp = mci_readl(host, BMOD);

	temp = mci_readl(host, BMOD);

	temp &= ~SDMMC_IDMAC_ENABLE;

	temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB);

	mci_writel(host, BMOD, temp);

	mci_writel(host, BMOD, temp);

}

}
@@ -385,7 +385,7 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) 




	/* Enable the IDMAC */

	/* Enable the IDMAC */

	temp = mci_readl(host, BMOD);

	temp = mci_readl(host, BMOD);

	temp |= SDMMC_IDMAC_ENABLE;

	temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB;

	mci_writel(host, BMOD, temp);

	mci_writel(host, BMOD, temp);





	/* Start it running */

	/* Start it running */