linux-kernel - [PATCH v2 4/4] venus: vdec: Add support for decode intra frames only

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Date:   Tue, 16 Jun 2020 23:14:46 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Maheshwar Ajja <majja@...eaurora.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH v2 4/4] venus: vdec: Add support for decode intra frames only

Adds support in the decoder for intra frames only decode. The
implementation in the Venus use HFI property for thumbnail
generation to lower memory usage and when the control is enabled
the number of decoder output buffers for progressive stream
will be one (for interlace two). We assume that the client will
queue on the decoder input intra frames only but this is not
mandatory. If the client queue non-intra frames on decoder input
they will be returned on decoder output with an error.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
 drivers/media/platform/qcom/venus/core.h       | 1 +
 drivers/media/platform/qcom/venus/vdec.c       | 7 +++++++
 drivers/media/platform/qcom/venus/vdec_ctrls.c | 9 ++++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 1bac30d4cf50..b9a3b9ca6ae1 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -191,6 +191,7 @@ struct vdec_controls {
 	u32 post_loop_deb_mode;
 	u32 profile;
 	u32 level;
+	bool intra_only;
 };
 
 struct venc_controls {
diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index 7c4c483d5438..aa68cefcae96 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -625,6 +625,13 @@ static int vdec_set_properties(struct venus_inst *inst)
 			return ret;
 	}
 
+	if (ctr->intra_only) {
+		ptype = HFI_PROPERTY_PARAM_VDEC_THUMBNAIL_MODE;
+		ret = hfi_session_set_property(inst, ptype, &en);
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/media/platform/qcom/venus/vdec_ctrls.c b/drivers/media/platform/qcom/venus/vdec_ctrls.c
index 3a963cbd342a..96ca8d9dd22e 100644
--- a/drivers/media/platform/qcom/venus/vdec_ctrls.c
+++ b/drivers/media/platform/qcom/venus/vdec_ctrls.c
@@ -28,6 +28,9 @@ static int vdec_op_s_ctrl(struct v4l2_ctrl *ctrl)
 	case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
 		ctr->level = ctrl->val;
 		break;
+	case V4L2_CID_MPEG_VIDEO_DECODE_INTRA_FRAMES_ONLY:
+		ctr->intra_only = ctrl->val;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -86,7 +89,7 @@ int vdec_ctrl_init(struct venus_inst *inst)
 	struct v4l2_ctrl *ctrl;
 	int ret;
 
-	ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 7);
+	ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 8);
 	if (ret)
 		return ret;
 
@@ -141,6 +144,10 @@ int vdec_ctrl_init(struct venus_inst *inst)
 	if (ctrl)
 		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
 
+	v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_DECODE_INTRA_FRAMES_ONLY,
+			  0, 1, 1, 0);
+
 	ret = inst->ctrl_handler.error;
 	if (ret) {
 		v4l2_ctrl_handler_free(&inst->ctrl_handler);
-- 
2.17.1