Hi Linus,
On 17/10/16 15:32, Linus Walleij wrote:
Hi Chaotian,
my Dragonboard 8060 has a regression on detecting the eMMC after
bisecting it down to this patch (which is sadly already in v4.8):
commit 08573eaf1a70104f83fdbee9b84e5be03480e9ed
Author: Chaotian Jing <chaotian.jing@xxxxxxxxxxxx>
Date: Thu May 19 16:47:41 2016 +0800
mmc: mmc: do not use CMD13 to get status after speed mode switch
Before this patch the eMMC is detected and all partitions enumerated
immediately, but after the patch it doesn't come up at all, except
sometimes, when it appears minutes (!) after boot, all of a sudden.
Do you have any ideas on what can be wrong?
I remember hitting timeout issue with new version of eMMC on SD600c-eval
board, this patch/hack fixed it for me.
https://git.linaro.org/people/srinivas.kandagatla/linux.git/commitdiff/e42d7427b9ce77174eef079be0e04e22bdb8fd07?hp=3e4bf0b78405694fd1ab4371c73e80932be21e3a
Also one more important thing was to do with regulator mode too.
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=93b8e6fda11757a20df21f3fc18e12789841f173
Can you give it a try.. If it works I can clean it up and send it for
review.
Thanks,
srini
This is the Qualcomm MMCI variant whid does *not* support
busydetection in hardware.
I will continue looking at it but would be happy for any hints on how to
solve it, currently I cannot mount root off the eMMC because of this.
Yours,
Linus Walleij
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