linux-kernel - Re: msm8996: sdhci-msm: apq8096-db820c sdhci fails to init - "Timeout waiting for hardware interrupt."

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Date:   Fri, 11 Oct 2019 16:22:59 +0200
From:   Paolo Pisati <p.pisati@...il.com>
To:     Loic Poulain <loic.poulain@...aro.org>
Cc:     Paolo Pisati <p.pisati@...il.com>,
        Brian Masney <masneyb@...tation.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Andy Gross <agross@...nel.org>, linux-kernel@...r.kernel.org,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>
Subject: Re: msm8996: sdhci-msm: apq8096-db820c sdhci fails to init -
 "Timeout waiting for hardware interrupt."

On Fri, Oct 11, 2019 at 02:47:05PM +0200, Loic Poulain wrote:
> > No dice, same exact problem.
> >
> > But the patch is present downstream[1]:
> >
> > commit c26727f853308dc4a6645dad09e9565429f8604f
> > Author: Loic Poulain <loic.poulain@...aro.org>
> > Date:   Wed Dec 12 17:51:48 2018 +0100
> >
> > arm64: dts: apq8096-db820c: Increase load on l21 for SDCARD
> >
> > In the same way as for msm8974-hammerhead, l21 load, used for SDCARD
> > VMMC, needs to be increased in order to prevent any voltage drop issues
> > (due to limited current) happening with some SDCARDS or during specific
> > operations (e.g. write).
> >
> > Fixes: 660a9763c6a9 (arm64: dts: qcom: db820c: Add pm8994 regulator node)
> > Signed-off-by: Loic Poulain <loic.poulain@...aro.org>
> >
> >
> > so it's probably worth carrying it.
> 
> I've sent it to LKML, but it has never landed (and I've never followed-up).

I see - btw, do you have a recent kernel where the mmc works on the db820c?
-- 
bye,
p.