linux-kernel - Re: [PATCH v4] venus: Enable sufficient sequence change support for sc7180 and fix for Decoder STOP command issue.

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Message-ID: <E98548DB-5085-4036-9F6C-DC22A604A0C2@linaro.org>
Date:   Wed, 29 Mar 2023 16:36:45 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Vikash Garodia <quic_vgarodia@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, stanimir.k.varbanov@...il.com,
        andersson@...nel.org, konrad.dybcio@...aro.org
CC:     quic_dikshita@...cinc.com, Viswanath Boma <quic_vboma@...cinc.com>
Subject: Re: [PATCH v4] venus: Enable sufficient sequence change support for sc7180 and fix for Decoder STOP command issue.

29 марта 2023 г. 10:48:23 GMT+03:00, Vikash Garodia <quic_vgarodia@...cinc.com> пишет:
>On 3/29/2023 3:49 AM, Dmitry Baryshkov wrote:
>> On 23/03/2023 15:01, Viswanath Boma wrote:
>>> For VP9 bitstreams, there could be a change in resolution at interframe,
>>> for driver to get notified of such resolution change,
>>> enable the property in video firmware.
>>> Also, EOS handling is now made same in video firmware across all V6 SOCs,
>>> hence above a certain firmware version, the driver handling is
>>> made generic for all V6s
>> 
>> Having "Do abc. Also do defgh." is a clear sign that this patch should be split into two.
>
>I agree, it could have split into patches. The patch introduces way to store venus firmware
>
>version and take some decision for various version. For ex. here STOP handling and enabling
>
>DRC event for specific firmware revision and onwards. Since both the handling was primarily
>
>dependent of firmware version, and since the handlings were smaller, it was combined as single
>
>patch. Let me know, if you have any further review comments, else, will raise a new version with
>
>2 patches probably.

Thanks!

>
>>> 
>>> Signed-off-by: Vikash Garodia <vgarodia@....qualcomm.com>
>>> Signed-off-by: Viswanath Boma <quic_vboma@...cinc.com>
>>> Tested-by: Nathan Hebert <nhebert@...omium.org>
>>> ---
>>> Since v3 : Addressed comments to rectify email address.
>>> 
>>>   drivers/media/platform/qcom/venus/core.h       | 18 ++++++++++++++++++
>>>   drivers/media/platform/qcom/venus/hfi_cmds.c   |  1 +
>>>   drivers/media/platform/qcom/venus/hfi_helper.h |  2 ++
>>>   drivers/media/platform/qcom/venus/hfi_msgs.c   | 11 +++++++++--
>>>   drivers/media/platform/qcom/venus/vdec.c       | 12 +++++++++++-
>>>   5 files changed, 41 insertions(+), 3 deletions(-)
>>> 

(Skipped)



>>> @@ -671,6 +671,16 @@ static int vdec_set_properties(struct venus_inst *inst)
>>>               return ret;
>>>       }
>>>   +    /* Enabling sufficient sequence change support for VP9 */
>>> +    if (of_device_is_compatible(inst->core->dev->of_node, "qcom,sc7180-venus")) {
>> 
>> Let me repeat my question from v3:
>> 
>> Is it really specific just to sc7180 or will it be applicable to any
>> other platform using venus-5.4 firmware?
>
>The HFI "HFI_PROPERTY_PARAM_VDEC_ENABLE_SUFFICIENT_SEQCHANGE_EVENT" is implemented
>
>only for sc7180. Calling this for any other venus-5.4 would error out the session with error as
>
>unsupported property from firmware.


How can we be sure that other platforms do not end up using sc7180 firmware? Or that sc7180 didn't end up using some other firmware?

I see generic  qcom/venus-5.4/venus.mbn in Linux firmware. It's version is VIDEO.VE.5.4-00053-PROD-1. It can be used with any unfused device which uses firmware 5.4

>
>> 
>>> +        if (is_fw_rev_or_newer(inst->core, 5, 4, 51)) {
>>> +            ptype = HFI_PROPERTY_PARAM_VDEC_ENABLE_SUFFICIENT_SEQCHANGE_EVENT;
>>> +            ret = hfi_session_set_property(inst, ptype, &en);
>>> +            if (ret)
>>> +                return ret;
>>> +        }
>>> +    }
>>> +
>>>       ptype = HFI_PROPERTY_PARAM_VDEC_CONCEAL_COLOR;
>>>       conceal = ctr->conceal_color & 0xffff;
>>>       conceal |= ((ctr->conceal_color >> 16) & 0xffff) << 10;
>>