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

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Message-Id: <CX75Y1X2QIN7.1GRH1YI56MMZ@fairphone.com>
Date:   Fri, 24 Nov 2023 16:56:08 +0100
From:   "Luca Weiss" <luca.weiss@...rphone.com>
To:     "Vikash Garodia" <quic_vgarodia@...cinc.com>,
        "Dmitry Baryshkov" <dmitry.baryshkov@...aro.org>
Cc:     "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>,
        <~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 2:35 PM CET, Vikash Garodia wrote:
>
>
> On 11/24/2023 6:23 PM, Dmitry Baryshkov wrote:
> > On Fri, 24 Nov 2023 at 14:30, Vikash Garodia <quic_vgarodia@...cinc.com> wrote:
> >>
> >> On 11/24/2023 5:05 PM, Luca Weiss wrote:
> >>> 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?
> >> I was testing this on RB3 board which uses firmware [1].
> > 
> > There is something wrong here.
> > 
> > RB3 board uses venus-5.2
> > RB5 board uses vpu-1.0
> > Only sc7280 uses vpu-2.0
>
> Tested on QCM6490 IDP board, which is QCOM internal board similar to RB3 gen2.

In any case, I don't know much about the venus & iommu setup here. I can
try removing the 0x2184 SID and test if venus still works on FP5.
Also should the chromebooks keep that iommu entry or not?

Regards
Luca

>
> >>
> >> Regards,
> >> Vikash
> >>
> >> [1]
> >> https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/qcom/vpu-2.0
> >>
> >>>>
> >>>>>>>                   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
> >>>
> >>
> > 
> >