linux-kernel - Re: [PATCH v2 2/3] arm64: dts: qcom: sc7280: Move video-firmware to chrome-common

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Date:   Fri, 24 Nov 2023 12:35:17 +0100
From:   "Luca Weiss" <luca.weiss@...rphone.com>
To:     "Vikash Garodia" <quic_vgarodia@...cinc.com>,
        "Stanimir Varbanov" <stanimir.k.varbanov@...il.com>,
        "Bryan O'Donoghue" <bryan.odonoghue@...aro.org>,
        "Andy Gross" <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        "Konrad Dybcio" <konrad.dybcio@...aro.org>,
        "Mauro Carvalho Chehab" <mchehab@...nel.org>,
        <cros-qcom-dts-watchers@...omium.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        "Conor Dooley" <conor+dt@...nel.org>
Cc:     <~postmarketos/upstreaming@...ts.sr.ht>,
        <phone-devel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 2/3] arm64: dts: qcom: sc7280: Move video-firmware to
 chrome-common

On Fri Nov 24, 2023 at 7:38 AM CET, Vikash Garodia wrote:
>
> On 11/22/2023 7:50 PM, Luca Weiss wrote:
> > On Wed Nov 22, 2023 at 2:17 PM CET, Vikash Garodia wrote:
> >>
> >> On 10/2/2023 7:50 PM, Luca Weiss wrote:
> >>> If the video-firmware node is present, the venus driver assumes we're on
> >>> a system that doesn't use TZ for starting venus, like on ChromeOS
> >>> devices.
> >>>
> >>> Move the video-firmware node to chrome-common.dtsi so we can use venus
> >>> on a non-ChromeOS devices.
> >>>
> >>> At the same time also disable the venus node by default in the dtsi,
> >>> like it's done on other SoCs.
> >>>
> >>> Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
> >>> Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> >>> ---
> >>>  arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi | 8 ++++++++
> >>>  arch/arm64/boot/dts/qcom/sc7280.dtsi               | 6 ++----
> >>>  2 files changed, 10 insertions(+), 4 deletions(-)
> >>>
> >>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi b/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi
> >>> index 5d462ae14ba1..cd491e46666d 100644
> >>> --- a/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi
> >>> +++ b/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi
> >>> @@ -104,6 +104,14 @@ &scm {
> >>>  	dma-coherent;
> >>>  };
> >>>  
> >>> +&venus {
> >>> +	status = "okay";
> >>> +
> >>> +	video-firmware {
> >>> +		iommus = <&apps_smmu 0x21a2 0x0>;
> >>> +	};
> >>> +};
> >>> +
> >>>  &watchdog {
> >>>  	status = "okay";
> >>>  };
> >>> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> >>> index 66f1eb83cca7..fa53f54d4675 100644
> >>> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> >>> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> >>> @@ -3740,6 +3740,8 @@ venus: video-codec@...0000 {
> >>>  				 <&apps_smmu 0x2184 0x20>;
> 0x2184 is a secure SID. I think qcm6490-fairphone-fp5.dts needs to override the
> iommus property as well to retain only the non secure SID i.e 0x2180 ? I am
> seeing below crash
>
> Call trace:
> [   47.663593]  qcom_smmu_write_s2cr+0x64/0xa4
> [   47.663616]  arm_smmu_attach_dev+0x120/0x284
> [   47.663647]  __iommu_attach_device+0x24/0xf8
> [   47.676845]  __iommu_device_set_domain+0x70/0xd0
> [   47.681632]  __iommu_group_set_domain_internal+0x60/0x1b4
> [   47.687218]  iommu_setup_default_domain+0x358/0x418
> [   47.692258]  __iommu_probe_device+0x3e4/0x404
>
> Could you please reconfirm if Video SID 0x2184 (and mask) is allowed by the
> qcm6490-fairphone-fp5 hardware having TZ ?

Hi,

On FP5 it seems it's no problem to have both SIDs in there, probe and
using venus appears to work fine.

Are you using different firmware than QCM6490.LA.3.0 on the device where
you tested this?

>
> >>>  			memory-region = <&video_mem>;
> >>>  
> >>> +			status = "disabled";
> >>> +
> >>>  			video-decoder {
> >>>  				compatible = "venus-decoder";
> >>>  			};
> >>> @@ -3748,10 +3750,6 @@ video-encoder {
> >>>  				compatible = "venus-encoder";
> >>>  			};
> >>>  
> >>> -			video-firmware {
> >>> -				iommus = <&apps_smmu 0x21a2 0x0>;
> >>> -			};
> >>> -
> >>>  			venus_opp_table: opp-table {
> >>>  				compatible = "operating-points-v2";
> >>>  
> >>>
> >> Changes look good. Is this tested on SC7280 ?
> > 
> > Hi Vikash,
> > 
> > I didn't test it myself on sc7280 (just qcm6490-fp5) but dtx_diff
> > reports no differences except for status = okay property being added, so
> > there should be no change on those boards. See below.
> > 
> > Regards
> > Luca
>
> I tested on SC7280 (herobrine) and all good.

Great, thanks!

Regards
Luca

>
> Regards,
> Vikash