Re: em28xx breaks after hibernate

[Johannes Stezenbach <js@linuxtv.org>]

On Fri, Sep 26, 2014 at 09:22:53AM -0600, Shuah Khan wrote:
> > 
> > [   20.212162] usb 1-1: reset high-speed USB device number 2 using ehci-pci
> > [   20.503868] em2884 #0: Resuming extensions
> > [   20.505275] em2884 #0: Resuming video extensionem2884 #0: Resuming DVB extension
> > [   20.533513] drxk: status = 0x439130d9
> > [   20.534282] drxk: detected a drx-3913k, spin A2, xtal 20.250 MHz
> > [   23.008852] em2884 #0: writing to i2c device at 0x52 failed (error=-5)
> > [   23.011408] drxk: i2c write error at addr 0x29
> > [   23.013187] drxk: write_block: i2c write error at addr 0x8303b4
> > [   23.015440] drxk: Error -5 while loading firmware
> > [   23.017291] drxk: Error -5 on init_drxk
> > [   23.018835] em2884 #0: fe0 resume 0
> > 
> > Any idea on this?
> > 
> 
> Looks like this is what's happening:
> during suspend:
> 
> drxk_sleep() gets called and marks state->m_drxk_state == DRXK_UNINITIALIZED
> 
> init_drxk() does download_microcode() and this step fails
> because the conditions in which init_drxk() gets called
> from drxk_attach() are different.
> 
> i2c isn't ready.
> 
> Is it possible for you to test this without power loss
> on usb assuming this test run usb bus looses power?
> 
> If you could do the following tests and see if there is
> a difference:
> 
> echo mem > /sys/power/state
> vs
> echo disk > /sys/power/state
> 
> If it is possible, with and without reset_resume hook.

My testing time is up for today, I'll look into it
maybe tomorrow.

BTW, what about 3.17?  The patches in media_tree.git are for
3.18, right?  If so, and you have patches for 3.17 or
3.16-stable to test, let me know.


Thanks,
Johannes