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 12:08:59 +0530
From:   Vikash Garodia <quic_vgarodia@...cinc.com>
To:     Luca Weiss <luca.weiss@...rphone.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 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 ?

>>>  			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.

Regards,
Vikash