[U-Boot] [linux-sunxi] CONFIG_DM_USB breakage on sunxi boards with musb?

[Priit Laes]

On Wed, Dec 19, 2018 at 01:26:18PM +0530, Jagan Teki wrote:
> On Wed, Dec 19, 2018 at 1:23 PM Priit Laes <plaes at plaes.org> wrote:
> >
> > Heya!
> >
> > I ran into following error when trying to fel-boot
> > A20 OLinuxino Lime2 eMMC board with latest u-boot:
> >
> > [snip]
> > U-Boot 2019.01-rc2-00005-gbf60dae9dd (Dec 19 2018 - 09:47:08 +0200) Allwinner Technology
> >
> > CPU:   Allwinner A20 (SUN7I)
> > Model: Olimex A20-OLinuXino-LIME2-eMMC
> > I2C:   ready
> > DRAM:  1 GiB
> > Error binding driver 'sunxi-musb': -96
> > Some drivers failed to bind
> > Error binding driver 'generic_simple_bus': -96
> > Some drivers failed to bind
> > initcall sequence 7efbdfc8 failed at call 4a00d07b (err=-96)
> > ### ERROR ### Please RESET the board ###
> > [/snip]
> >
> >
> > Could it be caused by a side effect of the upcoming CONFIG_DM_USB
> > changes?
> 
> No, board file change wrt this commit 0131162439508801b9f8a330fa731f04273c9337
> 
> Need to figure out.

Yup, bisecting points to the same commit and reverting fixes the issue.

0131162439508801b9f8a330fa731f04273c9337 is the first bad commit
commit 0131162439508801b9f8a330fa731f04273c9337
Author: Jean-Jacques Hiblot <jjhiblot at ti.com>
Date:   Thu Nov 29 10:52:46 2018 +0100

    dm: usb: create a new UCLASS ID for USB gadget devices
    
    UCLASS_USB_DEV_GENERIC was meant for USB devices connected to host
    controllers, not gadget devices.
    Adding a new UCLASS for gadget devices alone.
    
    Also move the generic DM code for USB gadgets in a separate file for
    clarity.
    
    Signed-off-by: Jean-Jacques Hiblot <jjhiblot at ti.com>

:040000 040000 5223a6058a0c4a1e877f32355c947d4a607fef1b d3f89658db63ec26d887163740cf5d974dd2c0e5 M	board
:040000 040000 67c4404917ada478595b408d7747a6f5c17c0c99 8c67ea39df65e4e982d9b9eeb984d66678a33fc8 M	drivers
:040000 040000 89243fd62729e128489d80e206db4fa9b946dc99 16783bd1f210ae3454255cb1c4eaa05fe7eaa6ed M	include

$ git bisect log
git bisect start
# bad: [058701534ffde8032649ba8421a0428959519b79] WIP
git bisect bad 058701534ffde8032649ba8421a0428959519b79
# bad: [d94604d558cda9f89722c967d6f8d6269a2db21c] Merge tag 'fsl-qoriq-for-v2019.01-rc2' of git://git.denx.de/u-boot-fsl-qoriq
git bisect bad d94604d558cda9f89722c967d6f8d6269a2db21c
# good: [c49aff3e66b930aa06936afee401cf5e19377958] Merge branch 'master' of git://git.denx.de/u-boot-sunxi
git bisect good c49aff3e66b930aa06936afee401cf5e19377958
# bad: [7ff485c68b7e5573e5a4a877066e98398283a24f] Merge branch 'master' of git://git.denx.de/u-boot-i2c
git bisect bad 7ff485c68b7e5573e5a4a877066e98398283a24f
# good: [19f8c4dfb6e744a31da59bdd23b24d144152f1dc] cmd: i2c: Fix help output of i2c command.
git bisect good 19f8c4dfb6e744a31da59bdd23b24d144152f1dc
# bad: [b491afa0f3c0df88027b08f18934cc034c40d659] configs: enable DM_USB and DM_USB_DEV for all DRA7 platforms
git bisect bad b491afa0f3c0df88027b08f18934cc034c40d659
# bad: [93991cf1969077108ae36e90acb3cd25a6a449ac] dwc3-generic: Add select_dr_mode operation
git bisect bad 93991cf1969077108ae36e90acb3cd25a6a449ac
# good: [20bebd866690bb09dd1c1cb8ac674c3b17b63c6d] dwc3_generic: do not probe the USB device driver when it's bound
git bisect good 20bebd866690bb09dd1c1cb8ac674c3b17b63c6d
# bad: [0131162439508801b9f8a330fa731f04273c9337] dm: usb: create a new UCLASS ID for USB gadget devices
git bisect bad 0131162439508801b9f8a330fa731f04273c9337
# good: [d648a50c0a27452a5439e7982b23b97c64820430] dwc3: move phy operation to core.c
git bisect good d648a50c0a27452a5439e7982b23b97c64820430
# first bad commit: [0131162439508801b9f8a330fa731f04273c9337] dm: usb: create a new UCLASS ID for USB gadget devices


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