linux-kernel - Re: [PATCH 5/5] media: mtk-vcodec: venc: Fail if a msg sent to VPU was not signaled

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Message-ID: <8973bfb4-8708-e739-02cb-f9ee670f401a@collabora.com>
Date:   Mon, 18 Oct 2021 13:43:13 +0200
From:   Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
To:     Irui Wang (王瑞) <Irui.Wang@...iatek.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>
Cc:     "dafna3@...il.com" <dafna3@...il.com>,
        "tfiga@...omium.org" <tfiga@...omium.org>,
        Tiffany Lin (林慧珊) 
        <tiffany.lin@...iatek.com>,
        "eizan@...omium.org" <eizan@...omium.org>,
        Maoguang Meng (孟毛广) 
        <Maoguang.Meng@...iatek.com>,
        "kernel@...labora.com" <kernel@...labora.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "hverkuil@...all.nl" <hverkuil@...all.nl>,
        Yunfei Dong (董云飞) 
        <Yunfei.Dong@...iatek.com>,
        Yong Wu (吴勇) <Yong.Wu@...iatek.com>,
        "hsinyi@...omium.org" <hsinyi@...omium.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        Andrew-CT Chen (陳智迪) 
        <Andrew-CT.Chen@...iatek.com>,
        "acourbot@...omium.org" <acourbot@...omium.org>
Subject: Re: [PATCH 5/5] media: mtk-vcodec: venc: Fail if a msg sent to VPU
 was not signaled



On 06.08.21 08:50, Irui Wang (王瑞) wrote:
> On Wed, 2021-08-04 at 16:27 +0200, Dafna Hirschfeld wrote:
>> Each message sent to the VPU should raise a signal. The signal
>> handler sets vpu->signaled. Test the field and fail
>> if it is 0.
> 
> I suppose you want to handle the message execution result, if ipi
> message can't send or acked successfully, the returned "status" of
> "mtk_vcodec_fw_ipi_send" will return, so I think you don't need to
> check "signaled" again.

in that case, the field 'signaled' is not needed and can be removed
So I can send a patch to remove it.

Thanks,
Dafna

> 
>>
>> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
>> ---
>>   drivers/media/platform/mtk-vcodec/venc_vpu_if.c | 4 +++-
>>   1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
>> b/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
>> index 234705ba7cd6..8331b1bd1971 100644
>> --- a/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
>> +++ b/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
>> @@ -92,6 +92,7 @@ static int vpu_enc_send_msg(struct venc_vpu_inst
>> *vpu, void *msg,
>>   {
>>   	int status;
>>   
>> +	vpu->signaled = 0;
>>   	mtk_vcodec_debug_enter(vpu);
>>   
>>   	if (!vpu->ctx->dev->fw_handler) {
>> @@ -106,6 +107,8 @@ static int vpu_enc_send_msg(struct venc_vpu_inst
>> *vpu, void *msg,
>>   			       *(uint32_t *)msg, len, status);
>>   		return -EINVAL;
>>   	}
>> +	if (!vpu->signaled)
>> +		return -EINVAL;
>>   	if (vpu->failure)
>>   		return -EINVAL;
>>   
>> @@ -122,7 +125,6 @@ int vpu_enc_init(struct venc_vpu_inst *vpu)
>>   	mtk_vcodec_debug_enter(vpu);
>>   
>>   	init_waitqueue_head(&vpu->wq_hd);
>> -	vpu->signaled = 0;
>>   	vpu->failure = 0;
>>   
>>   	status = mtk_vcodec_fw_ipi_register(vpu->ctx->dev->fw_handler,
>> vpu->id,