linux-kernel - [PATCH v2 2/2] media: venus: add new rate control type MBR for encoder

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Message-ID: <20240130112400.2636143-3-quic_sachinku@quicinc.com>
Date: Tue, 30 Jan 2024 16:54:00 +0530
From: Sachin Kumar Garg <quic_sachinku@...cinc.com>
To: <hverkuil-cisco@...all.nl>, Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
        Vikash Garodia
	<quic_vgarodia@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
CC: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: [PATCH v2 2/2] media: venus: add new rate control type MBR for encoder

There is no limit on the maximum level of the bit rate with
the existing VBR rate control.
V4L2_MPEG_VIDEO_BITRATE_MODE_MBR rate control will limit the
frame maximum bit rate range to the +/- 10% of the configured
bit-rate value. Encoder will choose appropriate quantization
parameter and do the smart bit allocation to set the frame
maximum bitrate level.

Signed-off-by: Sachin Kumar Garg <quic_sachinku@...cinc.com>
---
Changes since v1:
- Addressed comment related to code replication
- Addressed comment for handling of MBR RC for non supported SOCs

 drivers/media/platform/qcom/venus/hfi_cmds.c   | 7 +++++++
 drivers/media/platform/qcom/venus/hfi_helper.h | 1 +
 drivers/media/platform/qcom/venus/venc.c       | 2 ++
 drivers/media/platform/qcom/venus/venc_ctrls.c | 5 +++--
 4 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.c b/drivers/media/platform/qcom/venus/hfi_cmds.c
index 3418d2dd9371..b6a9e8b54fe1 100644
--- a/drivers/media/platform/qcom/venus/hfi_cmds.c
+++ b/drivers/media/platform/qcom/venus/hfi_cmds.c
@@ -653,6 +653,13 @@ static int pkt_session_set_property_1x(struct hfi_session_set_property_pkt *pkt,
 		case HFI_RATE_CONTROL_VBR_VFR:
 		case HFI_RATE_CONTROL_CQ:
 			break;
+		case HFI_RATE_CONTROL_MBR_CFR:
+			if (hfi_ver == HFI_VERSION_4XX) {
+				break;
+			} else {
+				ret = -ENOTSUPP;
+				break;
+			}
 		default:
 			ret = -EINVAL;
 			break;
diff --git a/drivers/media/platform/qcom/venus/hfi_helper.h b/drivers/media/platform/qcom/venus/hfi_helper.h
index e4c05d62cfc7..a0fd857f5c4b 100644
--- a/drivers/media/platform/qcom/venus/hfi_helper.h
+++ b/drivers/media/platform/qcom/venus/hfi_helper.h
@@ -232,6 +232,7 @@
 #define HFI_RATE_CONTROL_VBR_CFR		0x1000003
 #define HFI_RATE_CONTROL_CBR_VFR		0x1000004
 #define HFI_RATE_CONTROL_CBR_CFR		0x1000005
+#define HFI_RATE_CONTROL_MBR_CFR		0x1000006
 #define HFI_RATE_CONTROL_CQ			0x1000008
 
 #define HFI_VIDEO_CODEC_H264			0x00000002
diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index 3ec2fb8d9fab..8acbb05f6ce8 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -807,6 +807,8 @@ static int venc_set_properties(struct venus_inst *inst)
 						      HFI_RATE_CONTROL_CBR_CFR;
 	else if (ctr->bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_CQ)
 		rate_control = HFI_RATE_CONTROL_CQ;
+	else if (ctr->bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_MBR)
+		rate_control = HFI_RATE_CONTROL_MBR_CFR;
 
 	ptype = HFI_PROPERTY_PARAM_VENC_RATE_CONTROL;
 	ret = hfi_session_set_property(inst, ptype, &rate_control);
diff --git a/drivers/media/platform/qcom/venus/venc_ctrls.c b/drivers/media/platform/qcom/venus/venc_ctrls.c
index d9d2a293f3ef..c9c3b1b45525 100644
--- a/drivers/media/platform/qcom/venus/venc_ctrls.c
+++ b/drivers/media/platform/qcom/venus/venc_ctrls.c
@@ -387,10 +387,11 @@ int venc_ctrl_init(struct venus_inst *inst)
 
 	v4l2_ctrl_new_std_menu(&inst->ctrl_handler, &venc_ctrl_ops,
 		V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
-		V4L2_MPEG_VIDEO_BITRATE_MODE_CBR,
+		V4L2_MPEG_VIDEO_BITRATE_MODE_MBR,
 		~((1 << V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) |
 		  (1 << V4L2_MPEG_VIDEO_BITRATE_MODE_CBR) |
-		  (1 << V4L2_MPEG_VIDEO_BITRATE_MODE_CQ)),
+		  (1 << V4L2_MPEG_VIDEO_BITRATE_MODE_CQ)  |
+		  (1 << V4L2_MPEG_VIDEO_BITRATE_MODE_MBR)),
 		V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
 
 	v4l2_ctrl_new_std_menu(&inst->ctrl_handler, &venc_ctrl_ops,
-- 
2.34.1