linux-kernel - Re: [PATCH v8 16/28] media: iris: implement vb2 streaming ops

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Message-ID: <CAEvtbuus3scTvcjMuxxrfcqnd61+vqM5G=os-aUuM3+SLp2abQ@mail.gmail.com>
Date: Tue, 10 Dec 2024 13:50:36 +0100
From: Stefan Schmidt <stefan.schmidt@...aro.org>
To: Dikshita Agarwal <quic_dikshita@...cinc.com>
Cc: Vikash Garodia <quic_vgarodia@...cinc.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>, 
	Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Philipp Zabel <p.zabel@...gutronix.de>, Hans Verkuil <hverkuil@...all.nl>, 
	Sebastian Fricke <sebastian.fricke@...labora.com>, 
	"Bryan O'Donoghue" <bryan.odonoghue@...aro.org>, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Nicolas Dufresne <nicolas@...fresne.ca>, 
	Uwe Kleine-König <u.kleine-koenig@...libre.com>, 
	Jianhua Lu <lujianhua000@...il.com>, linux-media@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 16/28] media: iris: implement vb2 streaming ops

Hello Dikshita,

On Tue, 10 Dec 2024 at 12:07, Dikshita Agarwal
<quic_dikshita@...cinc.com> wrote:
>
> +static int iris_hfi_gen1_session_stop(struct iris_inst *inst, u32 plane)
> +{
> +       struct hfi_session_flush_pkt flush_pkt;
> +       struct iris_core *core = inst->core;
> +       struct hfi_session_pkt pkt;
> +       u32 flush_type = 0;
> +       int ret = 0;
> +
> +       if ((V4L2_TYPE_IS_OUTPUT(plane) &&
> +            inst->state == IRIS_INST_INPUT_STREAMING) ||
> +           (V4L2_TYPE_IS_CAPTURE(plane) &&
> +            inst->state == IRIS_INST_OUTPUT_STREAMING) ||
> +           inst->state == IRIS_INST_ERROR) {
> +               reinit_completion(&inst->completion);
> +               iris_hfi_gen1_packet_session_cmd(inst, &pkt, HFI_CMD_SESSION_STOP);
> +               ret = iris_hfi_queue_cmd_write(core, &pkt, pkt.shdr.hdr.size);
> +               if (!ret)
> +                       ret = iris_wait_for_session_response(inst, false);
> +
> +               reinit_completion(&inst->completion);
> +               iris_hfi_gen1_packet_session_cmd(inst, &pkt, HFI_CMD_SESSION_RELEASE_RESOURCES);
> +               ret = iris_hfi_queue_cmd_write(core, &pkt, pkt.shdr.hdr.size);
> +               if (!ret)
> +                       ret = iris_wait_for_session_response(inst, false);
> +       } else if (inst->state == IRIS_INST_STREAMING) {
> +               if (V4L2_TYPE_IS_OUTPUT(plane))
> +                       flush_type = HFI_FLUSH_ALL;
> +               else if (V4L2_TYPE_IS_CAPTURE(plane))
> +                       flush_type = HFI_FLUSH_OUTPUT;

Below there is also HFI_FLUSH_OUTPUT2 defined. Do we need to handle
this flush type here as well?

[...]

> +#define HFI_FLUSH_OUTPUT                               0x1000002
> +#define HFI_FLUSH_OUTPUT2                              0x1000003

regards
Stefan Schmidt