Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Fri, 11 Oct 2019 16:22:59 +0200
From:   Paolo Pisati <p.pisati@gmail.com>
To:     Loic Poulain <loic.poulain@linaro.org>
Cc:     Paolo Pisati <p.pisati@gmail.com>,
        Brian Masney <masneyb@onstation.org>,
        linux-arm-msm <linux-arm-msm@vger.kernel.org>,
        Andy Gross <agross@kernel.org>, linux-kernel@vger.kernel.org,
        Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Subject: Re: msm8996: sdhci-msm: apq8096-db820c sdhci fails to init -
 "Timeout waiting for hardware interrupt."
Message-ID: <20191011142259.GA1558@harukaze>
References: <20191010143232.GA13560@harukaze>
 <20191011060130.GA12357@onstation.org>
 <20191011112245.GA10461@harukaze>
 <CAMZdPi9hTQQcFHMRkj2R9t-P9AiPh01hKGPP5_F8T+MUuckVHA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAMZdPi9hTQQcFHMRkj2R9t-P9AiPh01hKGPP5_F8T+MUuckVHA@mail.gmail.com>
User-Agent: Mutt/1.9.4 (2018-02-28)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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@linaro.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@linaro.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.