Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <20230124182857.1524912-1-amit.pundir@linaro.org>
 <39751511-3f06-7c39-9c21-208d4c272113@linaro.org> <CAA8EJppLBuA08hkqTrZx_wwbtCxK9sAjv48c9_DxgPENgo7a8Q@mail.gmail.com>
 <1a840d88-e5b1-711c-b980-f57620c54472@linaro.org> <8508e3d5-7468-0b2f-5a43-7c439ecf2d8b@linaro.org>
 <CAMi1Hd2UNxXHUVWO-=sWh=-bVnrqE3UdLguFOq+62SfvUiEs0A@mail.gmail.com>
 <b2307e91-3373-539a-ecfb-e2542b9f83db@linaro.org> <ed737e67-eabc-6f29-b734-f4698767ca8e@linaro.org>
 <fa2e0db7-5b27-5a41-920b-b786dc4e521c@linaro.org> <027268b7-4b04-f52e-06a8-9d924dc6efe4@linaro.org>
 <dfcc8baa-c0a3-c554-a8cf-75702a1c4cad@linaro.org>
In-Reply-To: <dfcc8baa-c0a3-c554-a8cf-75702a1c4cad@linaro.org>
From:   Amit Pundir <amit.pundir@linaro.org>
Date:   Mon, 10 Apr 2023 14:21:34 +0530
Message-ID: <CAMi1Hd3+8bsKnH6jrC6AgPUDeyocJD6phre-Y4HXHpP9p+u+AA@mail.gmail.com>
Subject: Re: [PATCH] arm64: dts: qcom: sdm845-db845c: Mark cont splash memory
 region as reserved
To:     Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc:     "Bryan O'Donoghue" <bryan.odonoghue@linaro.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Andy Gross <agross@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Caleb Connolly <caleb.connolly@linaro.org>,
        linux-arm-msm <linux-arm-msm@vger.kernel.org>,
        dt <devicetree@vger.kernel.org>,
        lkml <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Thu, 9 Feb 2023 at 19:24, Dmitry Baryshkov
<dmitry.baryshkov@linaro.org> wrote:
>
> On 09/02/2023 14:22, Bryan O'Donoghue wrote:
> > On 09/02/2023 12:11, Bryan O'Donoghue wrote:
> >>> If the bootloader splash is enabled then this memory is used until the
> >>> DPU driver instructs MDP5 pipes to suck data from a newly assigned
> >>> address,
> >>> so there's a short window where it is.
> >>
> >> It seems a shame to reserve 30 something megabytes of memory for
> >> continuous splash unless we are actually using it is my point.
> >>
> >> If I'm running headless its just wasted memory.
> >
> > Couldn't we
> >
> > 1. Find reserved continuous splash memory
> > 2. Fee it in the MDP when we make the transition
>
> Qualcomm has investigated freeing the MDP/DPU cont_splash memory, but I
> fear that the end result was that it is not _that_ easy to free it. It
> is marked as reserved/no-map, so the kernel doesn't think about it as a
> memory region. Adding it back required hacking around that.

Hi Team,

This patch missed the v6.3 cut and I'm really hoping it to make it to
v6.4. Is there anything I can do it move it forward. Sorry if I missed
any action item assigned to me in the followup emails.

Regards,
Amit Pundir

>
> --
> With best wishes
> Dmitry
>