[PATCH 0/2] mmc: sdhci-iproc: Improve bcm2835 performance

[Stefan Wahren]

The sdhci-iproc waste a lot performance potential on bcm2835 because of
missing capabilities in the platform data. This patch series tries to fix
this.

Raspberry Pi Zero with a class 10 sdhc card

Before:
dd if=/dev/zero conv=fdatasync of=test bs=8k count=10000
81920000 Bytes (82 MB), 11,0044 s, 7,4 MB/s

sudo dd if=/dev/mmcblk0p1 of=/dev/null
62914560 Bytes (63 MB), 5,83784 s, 10,8 MB/s

After:
dd if=/dev/zero conv=fdatasync of=test bs=8k count=10000
81920000 Bytes (82 MB), 9,76938 s, 8,4 MB/s

sudo dd if=/dev/mmcblk0p1 of=/dev/null
62914560 Bytes (63 MB), 4,73651 s, 13,3 MB/s

Raspberry Pi Compute Module

Before:
dd if=/dev/zero conv=fdatasync of=test bs=8k count=10000
81920000 Bytes (82 MB), 27,4257 s, 3,0 MB/s

sudo dd if=/dev/mmcblk0p1 of=/dev/null
66060288 Bytes (66 MB), 21,4365 s, 3,1 MB/s

After:
dd if=/dev/zero conv=fdatasync of=test bs=8k count=10000
81920000 Bytes (82 MB), 7,19661 s, 11,4 MB/s

sudo dd if=/dev/mmcblk0p1 of=/dev/null
66060288 Bytes (66 MB), 4,76453 s, 13,9 MB/s

Any tests with a Raspberry Pi 3 (SD and Wifi over SDIO) are welcome.

Stefan Wahren (2):
  mmc: sdhci-iproc: Apply caps from bcm2835-mmc driver
  mmc: sdhci-iproc: Increase max_blk_size for bcm2835

 drivers/mmc/host/sdhci-iproc.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

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1.7.9.5