[PATCH] media: amphion: decoder implement display delay enable

[Ming Qian]

amphion vpu support a low latency mode,
when V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE is enabled,
decoder can display frame immediately after it's decoded.
Only h264 is support yet.

Fixes: 6de8d628df6e ("media: amphion: add v4l2 m2m vpu decoder stateful driver")
Signed-off-by: Ming Qian <ming.qian@xxxxxxx>
---
 drivers/media/platform/amphion/vdec.c       | 32 +++++++++++++++++++++
 drivers/media/platform/amphion/vpu_codec.h  |  3 +-
 drivers/media/platform/amphion/vpu_malone.c |  4 ++-
 3 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/amphion/vdec.c b/drivers/media/platform/amphion/vdec.c
index 03477998b9eb..3fa1a74a2e20 100644
--- a/drivers/media/platform/amphion/vdec.c
+++ b/drivers/media/platform/amphion/vdec.c
@@ -189,7 +189,31 @@ static const struct vpu_format vdec_formats[] = {
 	{0, 0, 0, 0},
 };
 
+static int vdec_op_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct vpu_inst *inst = ctrl_to_inst(ctrl);
+	struct vdec_t *vdec = inst->priv;
+	int ret = 0;
+
+	vpu_inst_lock(inst);
+	switch (ctrl->id) {
+	case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE:
+		vdec->params.display_delay_enable = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY:
+		vdec->params.display_delay = ctrl->val;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	vpu_inst_unlock(inst);
+
+	return ret;
+}
+
 static const struct v4l2_ctrl_ops vdec_ctrl_ops = {
+	.s_ctrl = vdec_op_s_ctrl,
 	.g_volatile_ctrl = vpu_helper_g_volatile_ctrl,
 };
 
@@ -202,6 +226,14 @@ static int vdec_ctrl_init(struct vpu_inst *inst)
 	if (ret)
 		return ret;
 
+	v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY,
+			  0, 0, 1, 0);
+
+	v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE,
+			  0, 1, 1, 0);
+
 	ctrl = v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
 				 V4L2_CID_MIN_BUFFERS_FOR_CAPTURE, 1, 32, 1, 2);
 	if (ctrl)
diff --git a/drivers/media/platform/amphion/vpu_codec.h b/drivers/media/platform/amphion/vpu_codec.h
index 528a93f08ecd..bac6d0d94f8a 100644
--- a/drivers/media/platform/amphion/vpu_codec.h
+++ b/drivers/media/platform/amphion/vpu_codec.h
@@ -55,7 +55,8 @@ struct vpu_encode_params {
 struct vpu_decode_params {
 	u32 codec_format;
 	u32 output_format;
-	u32 b_dis_reorder;
+	u32 display_delay_enable;
+	u32 display_delay;
 	u32 b_non_frame;
 	u32 frame_count;
 	u32 end_flag;
diff --git a/drivers/media/platform/amphion/vpu_malone.c b/drivers/media/platform/amphion/vpu_malone.c
index 26039741166a..ef44bff9fbaf 100644
--- a/drivers/media/platform/amphion/vpu_malone.c
+++ b/drivers/media/platform/amphion/vpu_malone.c
@@ -661,7 +661,9 @@ static int vpu_malone_set_params(struct vpu_shared_addr *shared,
 		hc->jpg[instance].jpg_mjpeg_interlaced = 0;
 	}
 
-	hc->codec_param[instance].disp_imm = params->b_dis_reorder ? 1 : 0;
+	hc->codec_param[instance].disp_imm = params->display_delay_enable ? 1 : 0;
+	if (malone_format != MALONE_FMT_AVC)
+		hc->codec_param[instance].disp_imm = 0;
 	hc->codec_param[instance].dbglog_enable = 0;
 	iface->dbglog_desc.level = 0;
 
-- 
2.38.1