linux-kernel - Re: [PATCH v3 3/3] arm: omap_hwmod disable ick autoidling when a hwmod requires that

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Date:   Fri, 18 Jan 2019 07:48:07 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     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, letux-kernel@...nphoenux.org
Subject: Re: [PATCH v3 3/3] arm: omap_hwmod disable ick autoidling when a
 hwmod requires that

Hi,

* Andreas Kemnade <andreas@...nade.info> [190116 22:04]:
> Deny autoidle for hwmods with the OCPIF_SWSUP_IDLE flag,
> that makes hwmods working properly which cannot handle
> autoidle properly in lower power states.

Sorry if I'm still missing something :)

But doesn't this now block autoidle for all modules
with OCPIF_SWSUP_IDLE even if they work just fine with
autoidle?

I think what you want to do is keep clocks enabled
while in use?

If so, how about using HWMOD_CLKDM_NOAUTO:

"HWMOD_CLKDM_NOAUTO: Allows the hwmod's clockdomain to
 be prevented from entering HW_AUTO while hwmod is
 active."

> Affected is e. g. the omap_hdq.

Have you already tried what happens if you just tag
omap_hdq with HWMOD_CLKDM_NOAUTO?

Regards,

Tony