linux-kernel - [PATCH 05/20] media: iris: Send V4L2_BUF_FLAG

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Message-ID: <20250408-iris-dec-hevc-vp9-v1-5-acd258778bd6@quicinc.com>
Date: Tue, 8 Apr 2025 21:24:19 +0530
From: Dikshita Agarwal <quic_dikshita@...cinc.com>
To: Vikash Garodia <quic_vgarodia@...cinc.com>,
        Abhinav Kumar
	<quic_abhinavk@...cinc.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stefan Schmidt <stefan.schmidt@...aro.org>,
        Hans Verkuil
	<hverkuil@...all.nl>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        "Dikshita
 Agarwal" <quic_dikshita@...cinc.com>
Subject: [PATCH 05/20] media: iris: Send V4L2_BUF_FLAG_ERROR for buffers
 with 0 filled length

Firmware sends buffers with 0 filled length which needs to be dropped,
to achieve the same, add V4L2_BUF_FLAG_ERROR to such buffers.
Also make sure:
- These 0 length buffers are not returned as result of flush.
- Its not a buffer with LAST flag enabled which will also have 0 filled
  length.

Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
---
 drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c b/drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c
index b75a01641d5d..91c5f04dd926 100644
--- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c
+++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_response.c
@@ -377,6 +377,12 @@ static int iris_hfi_gen2_handle_output_buffer(struct iris_inst *inst,
 
 	buf->flags = iris_hfi_gen2_get_driver_buffer_flags(inst, hfi_buffer->flags);
 
+	if (!buf->data_size && inst->state == IRIS_INST_STREAMING &&
+	    !(hfi_buffer->flags & HFI_BUF_FW_FLAG_LAST) &&
+	    !(inst->sub_state & IRIS_INST_SUB_DRC)) {
+		buf->flags |= V4L2_BUF_FLAG_ERROR;
+	}
+
 	return 0;
 }
 

-- 
2.34.1