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Date:   Mon, 30 Oct 2017 20:43:40 +0100
From:   Pavel Machek <pavel@....cz>
To:     Filip Matijević <filip.matijevic.pz@...il.com>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Tony Lindgren <tony@...mide.com>, pali.rohar@...il.com,
        kernel list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap@...r.kernel.org, khilman@...nel.org,
        aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
        patrikbachan@...il.com, serge@...lyn.com, abcloriens@...il.com,
        clayton@...ftyguy.net, martijn@...xit.nl,
        sakari.ailus@...ux.intel.com
Subject: n950: mmc fails to work, omap_hsmmc 480b4000.mmc: RX DMA channel
 request failed ? was Re: 4.13 (and probably all recent) kernels refuse to
 boot on one Nokia N950, work or another

Hi!

I was able to setup nfsroot, and boot postmarketos (with root
read/only, but that's good enough for debugging).

Then I was (finally!) able to run dmesg, and that tells me:

[    0.816040] mousedev: PS/2 mouse device common for all mice
[    0.817657] input: TWL4030 Keypad as
/devices/platform/68000000.ocp/48070000.i2c/i2c-0/0-0048/48070000.i2c:twl@48:keypad/input/input0
[    0.820800] i2c /dev entries driver
[    0.830261] omap_wdt: OMAP Watchdog Timer Rev 0x31: initial timeout
60 sec
[    0.836212] omap_hsmmc 480b4000.mmc: RX DMA channel request failed
[    0.840026] ledtrig-cpu: registered to indicate activity on CPUs
[    0.840789] omap-aes 480c5000.aes: OMAP AES hw accel rev: 2.6
[    0.840942] omap-aes 480c5000.aes: Unable to request in DMA channel
[    0.841644] omap-aes 480c5000.aes: will run requests pump with
realtime priority

Kernel 4.13-rc2.

I'm now trying:

+++ b/.config
-CONFIG_MMC_OMAP_HS=y
+# CONFIG_MMC_OMAP_HS is not set

With that, error is gone, but so is MMC driver, so... not good.

Any ideas?

Best regards,
									Pavel   
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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