This patch can improve performance when a sd card transfer size
is multiples of 32 like a sd memory card. However, this may
disimprove performance when a sd card transfer size is not
multiples of 32 because this patch uses PIO instead of SYS-DMAC.
So, I marked as "RFC" and sent linux-renesas-soc ML only
for the reference.
Yoshihiro Shimoda (4):
mmc: host: renesas_sdhi_sys_dmac: Use dma_buswidth instead of
hardcoded value
mmc: host: renesas_sdhi_sys_dmac: Do not fall back to PIO
mmc: host: renesas_sdhi_sys_dmac: add DMACR setting
mmc: host: renesas_sdhi_sys_dmac: Set dma_buswidth value to 32 byte
drivers/mmc/host/renesas_sdhi_core.c | 35 +++++++++++++++++++++++
drivers/mmc/host/renesas_sdhi_sys_dmac.c | 49 +++++++++-----------------------
2 files changed, 49 insertions(+), 35 deletions(-)
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2.7.4
