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

Konrad Dybcio
2025-06-27T15:27:11Z

On 6/27/25 5:23 PM, Vikash Garodia wrote:
>
> On 6/27/2025 8:50 PM, Konrad Dybcio wrote:
>> On 6/27/25 5:12 PM, 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.
>>
>> This is not a good source in general, GCC often has more rates defined
>> than the consumer is supposed to finally run at (because they were deemed
>> power-inefficient or similar, you can pretty much set any rate you want
>> on the clocks fwiw)
> Count wise, i agree. Value-wise, afaik, corners should match OR are you saying
> client scaling request for 133.0 MHz is ok when src is generating 133.33 MHz ?

I *think* we're running a closest-match in there.. but I'd love to
have the clock and consumer drivers agree on the rate exactly
(which in this case would be 133333333 - and the clock plan in
our docs agrees)

Konrad