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mmc: dw_mmc: fix the max_blk_count in IDMAC
Even though 1MB is reserved for descriptor table in IDMAC, the dw_mmc host driver is allowed to receive only maximum 128KB block length in one request. This is caused by setting improper max_blk_count. It needs to be e adjusted so that descriptor table is used fully. It is found that the performance is improved with the increased the max_blk_count. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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1 changed files with 2 additions and 2 deletions
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@ -2332,9 +2332,9 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
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#ifdef CONFIG_MMC_DW_IDMAC
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mmc->max_segs = host->ring_size;
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mmc->max_blk_size = 65536;
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mmc->max_blk_count = host->ring_size;
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mmc->max_seg_size = 0x1000;
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mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count;
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mmc->max_req_size = mmc->max_seg_size * host->ring_size;
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mmc->max_blk_count = mmc->max_req_size / 512;
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#else
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mmc->max_segs = 64;
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mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */
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