lkml.org 
[lkml]   [2014]   [Nov]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC 0/2] Fix Arndale Octa/Peach Pi boot on Audio subsystem clocks
From
Date
On wto, 2014-11-25 at 15:52 +0100, Javier Martinez Canillas wrote:
> Hello Krzysztof,
>
> On 11/25/2014 03:22 PM, Krzysztof Kozlowski wrote:
> >> Any ideas?
> >
> > Yes, I got. On Peach board the i2s0 is enabled in DTS. Probing it could
> > fail because it relies on enabling audss clocks (which cannot be
> > accessed).
> >
> > I reproduced another hang on Arndale Octa after enabling i2s0 in DTS.
> > Maybe that is the cause also on Peach.
> >
>
> You are correct, if I disable i2s0 then I see the logs from
> clk_disable_unused_subtree() and boot hangs when accessing the adma clock:
>
> clk: checking dout_fimd1
> clk: checking mout_fimd1_final
> clk: checking mout_fimd1
> clk: checking mout_sclk_rpll
> clk: checking fout_rpll
> clk: checking adma
>
> With i2s0 disabled, your series are indeed enough to make it boot again but
> as you said enabling i2s0 in the DTS makes it hang even with your patches.
>
> Thanks a lot for digging into this!

My patch only fixed the gate clocks but it didn't touched div and mux.
I'll prepare a v2 of it (I got some feedback) which I hope will fix both
cases: i2s and disabling unused clocks.

Best regards,
Krzysztof




\
 
 \ /
  Last update: 2014-11-25 16:21    [W:0.060 / U:0.544 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site