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SubjectRe: [PATCH] arm64: dts: hikey: Fix eMMC corruption regression
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Hi John,

On 2018/5/26 4:10, John Stultz wrote:
> This patch is a partial revert of commit
> abd7d0972a19 ("arm64: dts: hikey: Enable HS200 mode on eMMC")
>
> which has been causing eMMC corruption on my HiKey board.
>
> Symptoms usually looked like:
>
> mmc_host mmc0: Bus speed (slot 0) = 24800000Hz (slot req 400000Hz, actual 400000HZ div = 31)
> ...
> mmc_host mmc0: Bus speed (slot 0) = 148800000Hz (slot req 150000000Hz, actual 148800000HZ div = 0)
> mmc0: new HS200 MMC card at address 0001
> ...
> dwmmc_k3 f723d000.dwmmc0: Unexpected command timeout, state 3
> mmc_host mmc0: Bus speed (slot 0) = 24800000Hz (slot req 400000Hz, actual 400000HZ div = 31)
> mmc_host mmc0: Bus speed (slot 0) = 148800000Hz (slot req 150000000Hz, actual 148800000HZ div = 0)
> mmc_host mmc0: Bus speed (slot 0) = 24800000Hz (slot req 400000Hz, actual 400000HZ div = 31)
> mmc_host mmc0: Bus speed (slot 0) = 148800000Hz (slot req 150000000Hz, actual 148800000HZ div = 0)
> mmc_host mmc0: Bus speed (slot 0) = 24800000Hz (slot req 400000Hz, actual 400000HZ div = 31)
> mmc_host mmc0: Bus speed (slot 0) = 148800000Hz (slot req 150000000Hz, actual 148800000HZ div = 0)
> print_req_error: I/O error, dev mmcblk0, sector 8810504
> Aborting journal on device mmcblk0p10-8.
> mmc_host mmc0: Bus speed (slot 0) = 24800000Hz (slot req 400000Hz, actual 400000HZ div = 31)
> mmc_host mmc0: Bus speed (slot 0) = 148800000Hz (slot req 150000000Hz, actual 148800000HZ div = 0)
> mmc_host mmc0: Bus speed (slot 0) = 24800000Hz (slot req 400000Hz, actual 400000HZ div = 31)
> mmc_host mmc0: Bus speed (slot 0) = 148800000Hz (slot req 150000000Hz, actual 148800000HZ div = 0)
> mmc_host mmc0: Bus speed (slot 0) = 24800000Hz (slot req 400000Hz, actual 400000HZ div = 31)
> mmc_host mmc0: Bus speed (slot 0) = 148800000Hz (slot req 150000000Hz, actual 148800000HZ div = 0)
> mmc_host mmc0: Bus speed (slot 0) = 24800000Hz (slot req 400000Hz, actual 400000HZ div = 31)
> mmc_host mmc0: Bus speed (slot 0) = 148800000Hz (slot req 150000000Hz, actual 148800000HZ div = 0)
> EXT4-fs error (device mmcblk0p10): ext4_journal_check_start:61: Detected aborted journal
> EXT4-fs (mmcblk0p10): Remounting filesystem read-only
>
> And quite often this would result in a disk that wouldn't properly
> boot even with older kernels.
>
> It seems the max-frequency property added by the above patch is
> causing the problem, so remove it.
>
> Cc: Ryan Grachek <ryan@edited.us>
> Cc: Wei Xu <xuwei5@hisilicon.com>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Ulf Hansson <ulf.hansson@linaro.org>
> Cc: YongQin Liu <yongqin.liu@linaro.org>
> Cc: Leo Yan <leo.yan@linaro.org>
> Signed-off-by: John Stultz <john.stultz@linaro.org>

Thanks!
Applied to the hisilicon fix tree.

Best Regards,
Wei

> ---
> arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> index 724a0d3..edb4ee0 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> +++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> @@ -299,7 +299,6 @@
> /* GPIO blocks 16 thru 19 do not appear to be routed to pins */
>
> dwmmc_0: dwmmc0@f723d000 {
> - max-frequency = <150000000>;
> cap-mmc-highspeed;
> mmc-hs200-1_8v;
> non-removable;
>

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