Hi, Le mardi 18 octobre 2016 à 11:21 +0200, Heiko Stübner a écrit : > Am Sonntag, 16. Oktober 2016, 21:49:43 schrieb Paul Kocialkowski: > > > > 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. > > thanks for the heads up. > > As discussed on IRC we now have varying reports of the emmc working or not > working with and without that patch applied. So it's not really a bandaid fix > and I've thus dropped this patch again. Thanks for dropping it! For the record, my eMMC shows up as: mmcblk2: mmc2:0001 HAG2e 14.7 GiB Maybe it could help to share what each tested device reports as eMMC model and associate that with the current behavior, in spite of getting a clearer idea of what issue affects what model. > Still hoping someone will find the source of the problem somewhere :-) I have started investigating the issue, but did not discover anything significant yet. I hope I'll be able to figure it out! Cheers! -- 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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