On 1/18/2024 11:14 PM, Konrad Dybcio wrote:
>
>
> On 1/18/24 11:59, Sachin Kumar Garg wrote:
>> There is no limit on the maximum level of the bit rate with
>> the existing VBR rate control.
>> V4L2_MPEG_VIDEO_BITRATE_MODE_MBR rate control will limit the
>> frame maximum bit rate range to the +/- 10% of the configured
>> bit-rate value. Encoder will choose appropriate quantization
>> parameter and do the smart bit allocation to set the frame
>> maximum bitrate level.
>>
>> Signed-off-by: Sachin Kumar Garg <quic_sachinku@xxxxxxxxxxx>
>> ---
>> drivers/media/platform/qcom/venus/hfi_cmds.c | 38 +++++++++++++------
>> .../media/platform/qcom/venus/hfi_helper.h | 1 +
>> drivers/media/platform/qcom/venus/venc.c | 2 +
>> .../media/platform/qcom/venus/venc_ctrls.c | 5 ++-
>> 4 files changed, 33 insertions(+), 13 deletions(-)
>>
>> diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.c
>> b/drivers/media/platform/qcom/venus/hfi_cmds.c
>> index 3418d2dd9371..95fc27e0dc7d 100644
>> --- a/drivers/media/platform/qcom/venus/hfi_cmds.c
>> +++ b/drivers/media/platform/qcom/venus/hfi_cmds.c
>> @@ -645,17 +645,33 @@ static int pkt_session_set_property_1x(struct
>> hfi_session_set_property_pkt *pkt,
>> case HFI_PROPERTY_PARAM_VENC_RATE_CONTROL: {
>> u32 *in = pdata;
>> - switch (*in) {
>> - case HFI_RATE_CONTROL_OFF:
>> - case HFI_RATE_CONTROL_CBR_CFR:
>> - case HFI_RATE_CONTROL_CBR_VFR:
>> - case HFI_RATE_CONTROL_VBR_CFR:
>> - case HFI_RATE_CONTROL_VBR_VFR:
>> - case HFI_RATE_CONTROL_CQ:
>> - break;
>> - default:
>> - ret = -EINVAL;
>> - break;
>> + if (hfi_ver == HFI_VERSION_4XX) {
>
> So, only sdm845/sc7180 and friends support it, but the newer
> SoCs (like 8250 don't)?
Thats correct. Supported only in AR50 generations. Not available in 8250.
>
> [...]
>
>> --- a/drivers/media/platform/qcom/venus/venc_ctrls.c
>> +++ b/drivers/media/platform/qcom/venus/venc_ctrls.c
>> @@ -387,10 +387,11 @@ int venc_ctrl_init(struct venus_inst *inst)
>> v4l2_ctrl_new_std_menu(&inst->ctrl_handler, &venc_ctrl_ops,
>> V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
>> - V4L2_MPEG_VIDEO_BITRATE_MODE_CBR,
>> + V4L2_MPEG_VIDEO_BITRATE_MODE_MBR,
>
> Is this okay, since you're claiming only v4 supports it?
This looks okay to extend the support for new RC mode. I see an issue in
handling this new RC for non supported SOCs. This needs to be fixed in
hfi_cmds.c while preparing the packet. MBR for unsupported SOC should be treated
as -ENOTSUPP instead of -EINVAL which would terminate the session.
This need to be fixed.
Regards,
Vikash
