linux-kernel - Re: [PATCH 0/2] mach-omap2: handle autoidle denial

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Message-ID: <20181108070030.5febd96b@kemnade.info>
Date:   Thu, 8 Nov 2018 07:00:30 +0100
From:   Andreas Kemnade <andreas@...nade.info>
To:     t-kristo@...com, mturquette@...libre.com, sboyd@...nel.org,
        linux-omap@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, bcousson@...libre.com,
        paul@...an.com, tony@...mide.com, letux-kernel@...nphoenux.org
Subject: Re: [PATCH 0/2] mach-omap2: handle autoidle denial

ping.

..after stumbling again about that problem during testing with 4.20-rc1.
will retest it there.

On Thu,  4 Oct 2018 22:38:15 +0200
Andreas Kemnade <andreas@...nade.info> wrote:

> On the gta04 with a dm3730 omap_hdq does not work properly when the
> device enters lower power states. Idling uart1 and 2 is enough
> to show up that problem, if there are no other things enabled.
> Further research reveals that hdq iclk must not be turned off during
> transfers, also according to the TRM. That fact is also correctly described
> in the flags but the code to handle that is incomplete.
> 
> To handle multiple users of a single ick, autoidle is disabled
> when a user of that ick requires that (has the OCPIF_SWSUP_IDLE))
> 
> Changes since the RFC version:
> - mutex lock for autoidle changes
> - deny_idle/allow_idle calls moved to clock enable/disable of the
>   individual modules
> 
> Andreas Kemnade (2):
>   clk: ti: add a usecount for autoidle
>   arm: omap_hwmod disable ick autoidling when a hwmod requires that
> 
>  arch/arm/mach-omap2/omap_hwmod.c | 16 ++++++++++++----
>  drivers/clk/ti/autoidle.c        | 32 ++++++++++++++++++++++++--------
>  include/linux/clk/ti.h           |  1 +
>  3 files changed, 37 insertions(+), 12 deletions(-)
> 
> -- 
> 2.11.0
> 
> 

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