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>
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1 changed files with 2 additions and 2 deletions
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@ -316,7 +316,7 @@ static void dw_mci_idmac_stop_dma(struct dw_mci *host)
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/* Stop the IDMAC running */
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/* Stop the IDMAC running */
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temp = mci_readl(host, BMOD);
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temp = mci_readl(host, BMOD);
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temp &= ~SDMMC_IDMAC_ENABLE;
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temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB);
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mci_writel(host, BMOD, temp);
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mci_writel(host, BMOD, temp);
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}
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}
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@ -385,7 +385,7 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len)
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/* Enable the IDMAC */
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/* Enable the IDMAC */
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temp = mci_readl(host, BMOD);
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temp = mci_readl(host, BMOD);
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temp |= SDMMC_IDMAC_ENABLE;
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temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB;
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mci_writel(host, BMOD, temp);
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mci_writel(host, BMOD, temp);
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/* Start it running */
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/* Start it running */
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