linux-kernel - [PATCH v3 05/26] media: iris: Allow substate transition to load resources during output streaming

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Message-ID: <20250820-iris-video-encoder-v3-5-80ab0ba58b3d@quicinc.com>
Date: Wed, 20 Aug 2025 14:37:43 +0530
From: Dikshita Agarwal <quic_dikshita@...cinc.com>
To: Vikash Garodia <quic_vgarodia@...cinc.com>,
        Abhinav Kumar
	<abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stefan Schmidt
	<stefan.schmidt@...aro.org>,
        Vedang Nagar <quic_vnagar@...cinc.com>,
        "Hans
 Verkuil" <hverkuil@...nel.org>,
        Hans Verkuil <hverkuil@...nel.org>
CC: <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Renjiang Han <quic_renjiang@...cinc.com>,
        Wangao Wang <quic_wangaow@...cinc.com>,
        Dikshita Agarwal
	<quic_dikshita@...cinc.com>
Subject: [PATCH v3 05/26] media: iris: Allow substate transition to load
 resources during output streaming

A client (e.g., GST for encoder) can initiate streaming on the capture
port before the output port, causing the instance state to transition to
OUTPUT_STREAMING. When streaming is subsequently started on the output
port, the instance state advances to STREAMING, and the substate should
transition to LOAD_RESOURCES.

Previously, the code blocked the substate transition to LOAD_RESOURCES
if the instance state was OUTPUT_STREAMING. This update modifies the
logic to permit the substate transition to LOAD_RESOURCES when the
instance state is OUTPUT_STREAMING, thereby supporting this client
streaming sequence.

Fixes: 547f7b8c5090 ("media: iris: add check to allow sub states transitions")
Reviewed-by: Vikash Garodia <quic_vgarodia@...cinc.com>
Tested-by: Vikash Garodia <quic_vgarodia@...cinc.com> # X1E80100
Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
---
 drivers/media/platform/qcom/iris/iris_state.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/iris/iris_state.c b/drivers/media/platform/qcom/iris/iris_state.c
index 104e1687ad39dab93ff66450ba3a97c309b1e1e1..a21238d2818f9606871953bd0bee25382cca0474 100644
--- a/drivers/media/platform/qcom/iris/iris_state.c
+++ b/drivers/media/platform/qcom/iris/iris_state.c
@@ -122,7 +122,8 @@ static bool iris_inst_allow_sub_state(struct iris_inst *inst, enum iris_inst_sub
 		return false;
 	case IRIS_INST_OUTPUT_STREAMING:
 		if (sub_state & (IRIS_INST_SUB_DRC_LAST |
-			IRIS_INST_SUB_DRAIN_LAST | IRIS_INST_SUB_OUTPUT_PAUSE))
+			IRIS_INST_SUB_DRAIN_LAST | IRIS_INST_SUB_OUTPUT_PAUSE |
+			IRIS_INST_SUB_LOAD_RESOURCES))
 			return true;
 		return false;
 	case IRIS_INST_STREAMING:

-- 
2.34.1