Re: [PATCH v2] ARM: dts: rockchip: temporarily remove emmc hs200 speed from rk3288-veyron-speedy.
From: Paul Kocialkowski <hidden>
Date: 2016-10-16 19:50:50
Also in:
linux-arm-kernel, linux-rockchip, lkml
Hi, Le mardi 27 septembre 2016 à 13:53 -0700, Vagrant Cascadian a écrit :
This essentially mimics what was done with rk3288-veyron-minnie in commit 984926781122f034d5bc9962815d135b6c4a8e1d. The eMMC of the speedy Chromebook also appears to need the same tuning workaround, as it frequently fails to recognize the eMMC without it.
I have a device where (without this patch) eMMC sometimes fails, with: [ 3.561010] dwmmc_rockchip ff0f0000.dwmmc: Successfully tuned phase to 175 [ 3.571742] mmc2: new HS200 MMC card at address 0001 [ 3.571943] mmcblk2: mmc2:0001 HAG2e 14.7 GiB [ 3.572026] mmcblk2boot0: mmc2:0001 HAG2e partition 1 4.00 MiB [ 3.572107] mmcblk2boot1: mmc2:0001 HAG2e partition 2 4.00 MiB [ 3.572181] mmcblk2rpmb: mmc2:0001 HAG2e partition 3 4.00 MiB [ 3.685647] mmcblk2: error -110 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0 And sometimes works, with: [ 3.451058] dwmmc_rockchip ff0f0000.dwmmc: Successfully tuned phase to 176 [ 3.491093] mmc2: new HS200 MMC card at address 0001 [ 3.491277] mmcblk2: mmc2:0001 HAG2e 14.7 GiB [ 3.491345] mmcblk2boot0: mmc2:0001 HAG2e partition 1 4.00 MiB [ 3.491409] mmcblk2boot1: mmc2:0001 HAG2e partition 2 4.00 MiB [ 3.491474] mmcblk2rpmb: mmc2:0001 HAG2e partition 3 4.00 MiB [ 3.493548] mmcblk2: p1 p2 However, with this change, it always fails, with: [ 3.322129] mmc_host mmc2: Bus speed (slot 0) = 50000000Hz (slot req 52000000Hz, actual 50000000HZ div = 0) [ 3.333174] mmc2: error -110 whilst initialising MMC card I don't have so much time to investigate this issue, but it's clear that this patch doesn't fix the issue (and actually worsens it) for my device. Cheers!
quoted hunk ↗ jump to hunk
Signed-off-by: Vagrant Cascadian <redacted> --- Changes in v2: - Added Signed-off-by. arch/arm/boot/dts/rk3288-veyron-speedy.dts | 5 +++++ 1 file changed, 5 insertions(+)diff --git a/arch/arm/boot/dts/rk3288-veyron-speedy.dtsb/arch/arm/boot/dts/rk3288-veyron-speedy.dts index a0d033f..500fd18 100644--- a/arch/arm/boot/dts/rk3288-veyron-speedy.dts +++ b/arch/arm/boot/dts/rk3288-veyron-speedy.dts@@ -124,6 +124,11 @@&sdmmc_bus4>; }; + +&emmc { + /delete-property/mmc-hs200-1_8v; +}; + &vcc_5v { enable-active-high; gpio = <&gpio7 21 GPIO_ACTIVE_HIGH>; _______________________________________________ Linux-rockchip mailing list Linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org http://lists.infradead.org/mailman/listinfo/linux-rockchip
-- Paul Kocialkowski, developer of free digital technology at the lower levels Website: https://www.paulk.fr/ Coding blog: https://code.paulk.fr/ Git repositories: https://git.paulk.fr/ https://git.code.paulk.fr/
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