From: Clemens Gruber <clemens.gruber@pqgruber.com>
To: linux-mmc@vger.kernel.org
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
Linus Walleij <linus.walleij@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Dong Aisheng <aisheng.dong@nxp.com>,
linux-kernel@vger.kernel.org
Subject: eMMC boot problem: switch to bus width 8 ddr failed
Date: Fri, 6 Jan 2017 01:41:14 +0100 [thread overview]
Message-ID: <20170106004114.GA22893@archie.localdomain> (raw)
Hi,
with the current mainline 4.10-rc2 kernel, I can no longer boot from
the eMMC on my i.MX6Q board.
Details:
The eMMC is a Micron MTFC4GACAJCN-1M WT but as the i.MX6Q only supports
eMMC 4.41 features and we did not implement voltage switching from 3.3V
to 1.8V or lower, I did add no-1-8-v; (but none of the mmc-ddr or mmc-hs
options) to the device tree. The bus-width is 8.
With 4.9 the board booted fine, now with the current mainline 4.10 tree,
I get the following (repeating) errors at boot:
[ 4.326834] Waiting for root device /dev/mmcblk0p2...
[ 14.563861] mmc0: Timeout waiting for hardware cmd interrupt.
[ 14.569619] sdhci: =========== REGISTER DUMP (mmc0)===========
[ 14.575461] sdhci: Sys addr: 0x4e726000 | Version: 0x00000002
[ 14.581300] sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000001
[ 14.587140] sdhci: Argument: 0x00010000 | Trn mode: 0x00000013
[ 14.592979] sdhci: Present: 0x01fd8009 | Host ctl: 0x00000031
[ 14.598816] sdhci: Power: 0x00000002 | Blk gap: 0x00000080
[ 14.604654] sdhci: Wake-up: 0x00000008 | Clock: 0x0000001f
[ 14.610493] sdhci: Timeout: 0x0000008f | Int stat: 0x00000000
[ 14.616332] sdhci: Int enab: 0x107f100b | Sig enab: 0x107f100b
[ 14.622168] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000003
[ 14.628007] sdhci: Caps: 0x07eb0000 | Caps_1: 0x0000a007
[ 14.633845] sdhci: Cmd: 0x00000d1a | Max curr: 0x00ffffff
[ 14.639682] sdhci: Host ctl2: 0x00000000
[ 14.643611] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x4e6f7208
[ 14.649447] sdhci: ===========================================
This repeats a few times, then more information is shown at the bottom:
[ 86.893859] mmc0: Timeout waiting for hardware cmd interrupt.
[ 86.899615] sdhci: =========== REGISTER DUMP (mmc0)===========
[ 86.905453] sdhci: Sys addr: 0x00000000 | Version: 0x00000002
[ 86.911291] sdhci: Blk size: 0x00000200 | Blk cnt: 0x00000001
[ 86.917129] sdhci: Argument: 0x00010000 | Trn mode: 0x00000013
[ 86.922967] sdhci: Present: 0x01fd8009 | Host ctl: 0x00000031
[ 86.928804] sdhci: Power: 0x00000002 | Blk gap: 0x00000080
[ 86.934642] sdhci: Wake-up: 0x00000008 | Clock: 0x0000001f
[ 86.940479] sdhci: Timeout: 0x0000008f | Int stat: 0x00000000
[ 86.946316] sdhci: Int enab: 0x107f100b | Sig enab: 0x107f100b
[ 86.952154] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000003
[ 86.957992] sdhci: Caps: 0x07eb0000 | Caps_1: 0x0000a007
[ 86.963830] sdhci: Cmd: 0x00000d1a | Max curr: 0x00ffffff
[ 86.969668] sdhci: Host ctl2: 0x00000000
[ 86.973596] sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
[ 86.979433] sdhci: ===========================================
[ 86.986356] mmc0: switch to bus width 8 ddr failed
[ 86.991163] mmc0: error -110 whilst initialising MMC card
[ 97.773859] mmc0: Timeout waiting for hardware cmd interrupt.
--
After looking through the latest commits to mmc/core, I found the
culprit:
Commit e173f8911f091fa50ccf8cc1fa316dd5569bc470 ("mmc: core: Update
CMD13 polling policy when switch to HS DDR mode")
Reverting it fixes the problem. But I am unsure if that's the right
course of action?
Feel free to send me patches for testing!
Regards,
Clemens
next reply other threads:[~2017-01-06 0:41 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-06 0:41 Clemens Gruber [this message]
2017-01-06 2:33 ` eMMC boot problem: switch to bus width 8 ddr failed Shawn Lin
2017-01-06 15:56 ` Clemens Gruber
2017-01-09 7:09 ` Shawn Lin
2017-01-10 8:32 ` Bough Chen
2017-01-12 16:51 ` Ulf Hansson
2017-01-13 2:10 ` Shawn Lin
2017-01-13 3:12 ` Bough Chen
2017-01-13 4:03 ` Shawn Lin
2017-01-13 4:45 ` Dong Aisheng
2017-01-13 4:40 ` Dong Aisheng
2017-01-13 11:14 ` Ulf Hansson
2017-01-13 11:23 ` Ulf Hansson
2017-01-16 3:12 ` Bough Chen
2017-01-06 2:54 ` Shawn Lin
2017-01-06 16:07 ` Clemens Gruber
2017-01-09 7:33 ` Shawn Lin
2017-01-09 22:25 ` Jagan Teki
2017-01-10 1:04 ` Shawn Lin
2017-01-10 15:25 ` Dong Aisheng
2017-01-10 15:22 ` Dong Aisheng
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