linux-kernel - Re: [PATCH v2] media: venus: flush all buffers in output plane streamoff

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Date: Sun, 21 Apr 2024 21:18:36 +0300
From: Stanimir Varbanov <stanimir.k.varbanov@...il.com>
To: Dikshita Agarwal <quic_dikshita@...cinc.com>,
 Vikash Garodia <quic_vgarodia@...cinc.com>, Andy Gross <agross@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 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
Subject: Re: [PATCH v2] media: venus: flush all buffers in output plane
 streamoff

Hello Dikshita,

On 10.01.24 г. 8:12 ч., Dikshita Agarwal wrote:
> For scenarios, when source change is followed by VIDIOC_STREAMOFF
> on output plane, driver should discard any queued OUTPUT
> buffers, which are not decoded or dequeued.
> Flush with HFI_FLUSH_INPUT does not have any actual impact.
> So, fix it, by invoking HFI_FLUSH_ALL, which will flush all
> queued buffers.
> 
> Fixes: 85872f861d4c ("media: venus: Mark last capture buffer")

Cc: stable is missing with a kernel version.

> Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
> ---
> Changes since v1:
> - Added fixes tag (Bryan)
> 
>   drivers/media/platform/qcom/venus/vdec.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
> index 29130a9..0d2ab95 100644
> --- a/drivers/media/platform/qcom/venus/vdec.c
> +++ b/drivers/media/platform/qcom/venus/vdec.c
> @@ -1255,7 +1255,7 @@ static int vdec_stop_output(struct venus_inst *inst)
>   		break;
>   	case VENUS_DEC_STATE_INIT:
>   	case VENUS_DEC_STATE_CAPTURE_SETUP:
> -		ret = hfi_session_flush(inst, HFI_FLUSH_INPUT, true);
> +		ret = hfi_session_flush(inst, HFI_FLUSH_ALL, true);

Is it tested on msm8916? If I remember correctly FLUSH_ALL produces 
session error, could you confirm, please.

-- 
regards,
Stan