linux-kernel - Re: [PATCH 1/6] arm64: dts: qcom: sm8150: add apps

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Date:   Fri, 05 Jun 2020 19:33:13 +0530
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Jonathan Marek <jonathan@...ek.ca>, linux-arm-msm@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        devicetree-owner@...r.kernel.org
Subject: Re: [PATCH 1/6] arm64: dts: qcom: sm8150: add apps_smmu node

On 2020-05-29 08:45, Bjorn Andersson wrote:
> On Thu 28 May 20:02 PDT 2020, Jonathan Marek wrote:
> 
>> 
>> 
>> On 5/28/20 10:52 PM, Bjorn Andersson wrote:
>> > On Sat 23 May 19:38 PDT 2020, Jonathan Marek wrote:
>> >
>> > > Add the apps_smmu node for sm8150. Note that adding the iommus field for
>> > > UFS is required because initializing the iommu removes the bypass mapping
>> > > that created by the bootloader.
>> > >
>> >
>> > Unrelated to the patch itself; how do you disable the splash screen on
>> > 8150? "fastboot oem select-display-panel none" doesn't seem to work for
>> > me on the MTP - and hence this would prevent my device from booting.
>> >
>> > Thanks,
>> > Bjorn
>> >
>> 
>> I don't have a MTP, but on HDK855, "fastboot oem select-display-panel 
>> none"
>> combined with setting the physical switch to HDMI mode (which switches 
>> off
>> the 1440x2560 panel) gets it to not setup the display at all (just the
>> fastboot command isn't enough).
>> 
> 
> Okay, I don't think we have anything equivalent on the MTP, but good to
> know.
> 

Actually I tried out this in SM8150 MTP and it works fine for me,

"fastboot set_active a; fastboot set_active b; fastboot set_active a; 
fastboot oem select-display-panel none; fastboot reboot bootloader; 
fastboot boot boot-sm8150.img"

Also I need to switch slots everytime like above, otherwise I always see 
some error
while loading the boot image.

Thanks,
Sai

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