Re: [PATCH v5 5/5] arm64: dts: qcom: qcm2290: Add venus video node

Jorge Ramirez
2025-07-07T09:15:15Z

On 27/06/25 20:42:45, Vikash Garodia wrote:
>
> On 6/27/2025 8:38 PM, Jorge Ramirez wrote:
> > On 27/06/25 20:28:29, Vikash Garodia wrote:
> >>
> >> On 6/27/2025 6:03 PM, Jorge Ramirez wrote:
> >>> On 27/06/25 17:40:19, Vikash Garodia wrote:
> >>>>
> >>>> On 6/26/2025 7:29 PM, Jorge Ramirez-Ortiz wrote:
> >>>>> Add DT entries for the qcm2290 venus encoder/decoder.
> >>>>>
> >>>>> Co-developed-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
> >>>>> Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
> >>>>> Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez@oss.qualcomm.com>
> >>>>> ---
> >>>>> arch/arm64/boot/dts/qcom/qcm2290.dtsi | 57 +++++++++++++++++++++++++++
> >>>>> 1 file changed, 57 insertions(+)
> >>>>>
> >>>>> diff --git a/arch/arm64/boot/dts/qcom/qcm2290.dtsi b/arch/arm64/boot/dts/qcom/qcm2290.dtsi
> >>>>> index f49ac1c1f8a3..5326c91a0ff0 100644
> >>>>> --- a/arch/arm64/boot/dts/qcom/qcm2290.dtsi
> >>>>> +++ b/arch/arm64/boot/dts/qcom/qcm2290.dtsi
> >>>>> @@ -1628,6 +1628,63 @@ adreno_smmu: iommu@59a0000 {
> >>>>> #iommu-cells = <2>;
> >>>>> };
> >>>>>
> >>>>> + venus: video-codec@5a00000 {
> >>>>> + compatible = "qcom,qcm2290-venus";
> >>>>> + reg = <0 0x5a00000 0 0xf0000>;
> >>>>> + interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH>;
> >>>>> +
> >>>>> + power-domains = <&gcc GCC_VENUS_GDSC>,
> >>>>> + <&gcc GCC_VCODEC0_GDSC>,
> >>>>> + <&rpmpd QCM2290_VDDCX>;
> >>>>> + power-domain-names = "venus",
> >>>>> + "vcodec0",
> >>>>> + "cx";
> >>>>> + operating-points-v2 = <&venus_opp_table>;
> >>>>> +
> >>>>> + clocks = <&gcc GCC_VIDEO_VENUS_CTL_CLK>,
> >>>>> + <&gcc GCC_VIDEO_AHB_CLK>,
> >>>>> + <&gcc GCC_VENUS_CTL_AXI_CLK>,
> >>>>> + <&gcc GCC_VIDEO_THROTTLE_CORE_CLK>,
> >>>>> + <&gcc GCC_VIDEO_VCODEC0_SYS_CLK>,
> >>>>> + <&gcc GCC_VCODEC0_AXI_CLK>;
> >>>>> + clock-names = "core",
> >>>>> + "iface",
> >>>>> + "bus",
> >>>>> + "throttle",
> >>>>> + "vcodec0_core",
> >>>>> + "vcodec0_bus";
> >>>>> +
> >>>>> + memory-region = <&pil_video_mem>;
> >>>>> + iommus = <&apps_smmu 0x860 0x0>,
> >>>>> + <&apps_smmu 0x880 0x0>,
> >>>>> + <&apps_smmu 0x861 0x04>,
> >>>>> + <&apps_smmu 0x863 0x0>,
> >>>>> + <&apps_smmu 0x804 0xe0>;
> >>>> keep only the non secure ones.
> >>>
> >>> ok
> >>>
> >>>>> +
> >>>>> + interconnects = <&mmnrt_virt MASTER_VIDEO_P0 RPM_ALWAYS_TAG
> >>>>> + &bimc SLAVE_EBI1 RPM_ALWAYS_TAG>,
> >>>>> + <&bimc MASTER_APPSS_PROC RPM_ACTIVE_TAG
> >>>>> + &config_noc SLAVE_VENUS_CFG RPM_ACTIVE_TAG>;
> >>>>> + interconnect-names = "video-mem",
> >>>>> + "cpu-cfg";
> >>>>> +
> >>>>> + status = "okay";
> >>>>> +
> >>>>> + venus_opp_table: opp-table {
> >>>>> + compatible = "operating-points-v2";
> >>>>> +
> >>>>> + opp-133000000 {
> >>>>> + opp-hz = /bits/ 64 <133000000>;
> >>>>> + required-opps = <&rpmpd_opp_low_svs>;
> >>>>> + };
> >>>> Fix the corner freq value
> >>>
> >>> can you add some reference please?
> >>>
> >>> I took this data from an internal document - not sure why the downstream
> >>> driver supports different values or where those were taken from (AFAIK
> >>> they are not supported)
> >> Most likely you have referred incorrect downstream file. Refer scuba-vidc.dtsi.
> >
> > I took them from actual documents (which might or might not be obsolete,
> > hard to say but they were the latest version and as such, they
> > contradict the downstream dtsi).
> >
> > So I'd rather not use downstream - could you point me to the reference
> > you used please - I wonder if the fix is required downstream instead of here?
>
> You can look for this file gcc-scuba.c and refer gcc_video_venus_clk_src which
> is the src for different venus clocks.

sure, but the question remains, how do I know these are correct when the
documentation I have claims the opposite?

AFAIK downstream could be wrong, no?

>
> >
> >> Again, good reference for such cases would IP catalogues and if not, gcc driver
> >> in this case which have structures defining different corners for
> >> video.
> >
> > The PM document for this chip only confirms two values - the other 4 ones
> > claim they are not supported on 50_LT
> >
> > but we can discuss offline.
> >
> >>>
> >>>
> >>>>
> >>>> Regards,
> >>>> Vikash
> >>>>> +
> >>>>> + opp-240000000 {
> >>>>> + opp-hz = /bits/ 64 <240000000>;
> >>>>> + required-opps = <&rpmpd_opp_svs>;
> >>>>> + };
> >>>>> + };
> >>>>> + };
> >>>>> +
> >>>>> mdss: display-subsystem@5e00000 {
> >>>>> compatible = "qcom,qcm2290-mdss";
> >>>>> reg = <0x0 0x05e00000 0x0 0x1000>;