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author | Christoph Fritz <chf.fritz@googlemail.com> | 2017-12-09 23:47:55 +0100 |
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committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-12-11 13:43:27 +0100 |
commit | 91516a2a4734614d62ee3ed921f8f88acc67c000 (patch) | |
tree | 140286bfa49b4006eac4fb8c46d35a8aaa808a98 /Documentation/arm64 | |
parent | be17f1ce8572d6e15559897421fb7041360bb64a (diff) | |
download | linux-91516a2a4734614d62ee3ed921f8f88acc67c000.tar.gz |
mmc: core: apply NO_CMD23 quirk to some specific cards
To get an usdhc Apacer and some ATP SD cards work reliable, CMD23 needs
to be disabled. This has been tested on i.MX6 (sdhci-esdhc) and rk3288
(dw_mmc-rockchip).
Without this patch on i.MX6 (sdhci-esdhc):
$ dd if=/dev/urandom of=/mnt/test bs=1M count=10 conv=fsync
| <mmc0: starting CMD23 arg 00000400 flags 00000015>
| mmc0: starting CMD25 arg 00a71f00 flags 000000b5
| mmc0: blksz 512 blocks 1024 flags 00000100 tsac 3000 ms nsac 0
| mmc0: CMD12 arg 00000000 flags 0000049d
| sdhci [sdhci_irq()]: *** mmc0 got interrupt: 0x00000001
| mmc0: Timeout waiting for hardware interrupt.
Without this patch on rk3288 (dw_mmc-rockchip):
| mmc1: Card stuck in programming state! mmcblk1 card_busy_detect
| dwmmc_rockchip ff0c0000.dwmmc: Busy; trying anyway
| mmc_host mmc1: Bus speed (slot 0) = 400000Hz (slot req 400000Hz,
| actual 400000HZ div = 0)
| mmc1: card never left busy state
| mmc1: tried to reset card, got error -110
| blk_update_request: I/O error, dev mmcblk1, sector 139778
| Buffer I/O error on dev mmcblk1p1, logical block 131586, lost async
| page write
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Cc: <stable@vger.kernel.org> # v4.14+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation/arm64')
0 files changed, 0 insertions, 0 deletions