linux-kernel - Re: [PATCH 08/18] media: venus: hfi_venus: Fix version checks in venus_halt

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Message-ID: <7b88b9c5-24cb-eca3-94f8-0592cb2348f1@quicinc.com>
Date:   Thu, 2 Mar 2023 18:05:58 +0530
From:   Dikshita Agarwal <quic_dikshita@...cinc.com>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
        Vikash Garodia <quic_vgarodia@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        "Mauro Carvalho Chehab" <mchehab@...nel.org>,
        Dikshita Agarwal <dikshita@....qualcomm.com>,
        Dikshita Agarwal <dikshita@...eaurora.org>,
        Mansur Alisha Shaik <mansur@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>
CC:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        "Vikash Garodia" <vgarodia@...eaurora.org>
Subject: Re: [PATCH 08/18] media: venus: hfi_venus: Fix version checks in
 venus_halt_axi()


On 2/28/2023 9:31 PM, Konrad Dybcio wrote:
>
> On 28.02.2023 16:36, Bryan O'Donoghue wrote:
>> On 28/02/2023 15:24, Konrad Dybcio wrote:
>>> Only IRIS2(_1) should enter the until-now-IS_V6() path and the
>>> condition for skipping part of it should be IS_IRIS2_1 and not the
>>> number of VPP pipes. Fix that.
>>>
>>> Fixes: 4b0b6e147dc9 ("media: venus: hfi: Add 6xx AXI halt logic")
>>> Fixes: 78d434ba8659 ("media: venus: hfi: Skip AON register programming for V6 1pipe")
>>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>>> ---
>>>    drivers/media/platform/qcom/venus/hfi_venus.c | 4 ++--
>>>    1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/media/platform/qcom/venus/hfi_venus.c b/drivers/media/platform/qcom/venus/hfi_venus.c
>>> index 4d785e53aa0b..0d137e070407 100644
>>> --- a/drivers/media/platform/qcom/venus/hfi_venus.c
>>> +++ b/drivers/media/platform/qcom/venus/hfi_venus.c
>>> @@ -550,10 +550,10 @@ static int venus_halt_axi(struct venus_hfi_device *hdev)
>>>        u32 mask_val;
>>>        int ret;
>>>    -    if (IS_V6(hdev->core)) {
>>> +    if (IS_IRIS2(hdev->core) || IS_IRIS2_1(hdev->core)) {
>>>            writel(0x3, cpu_cs_base + CPU_CS_X2RPMH_V6);
>>>    -        if (hdev->core->res->num_vpp_pipes == 1)
>>> +        if (IS_IRIS2_1(hdev->core))
>>>                goto skip_aon_mvp_noc;
>>>              writel(0x1, aon_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>>>
>> If you want to denote these as fixes, you need your patch 02/18 as a depend...
> The main purpose of the Fixes tag is to mark commits that fix bugs in
> existing code and it only assists in autoselecting stable patches.
> Backporting this makes little sense, as we only support IRIS2 (8250)
> and IRIS2_1 (7280) HFI6 platforms and new additions won't be backported.
>
> Konrad

IRIS2_1 is nothing but IRIS2 with 1 VPP pipe (just a downstream notation 
to differentiate between two IRIS2 based chips).

So having the num_vpp_pipes check was fine, nothing wrong with that.

but since now you are introducing new VPU based check, it can be 
replaced with IRIS2_1 check.

Thanks,

Dikshita

>> ---
>> bod