1 files changed, 659 insertions, 0 deletions
diff --git a/drivers/media/platform/qcom/iris/iris_vdec.c b/drivers/media/platform/qcom/iris/iris_vdec.c
new file mode 100644
index 000000000000..4143acedfc57
--- /dev/null
+++ b/drivers/media/platform/qcom/iris/iris_vdec.c
@@ -0,0 +1,659 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <media/v4l2-event.h>
+#include <media/v4l2-mem2mem.h>
+
+#include "iris_buffer.h"
+#include "iris_ctrls.h"
+#include "iris_instance.h"
+#include "iris_power.h"
+#include "iris_vdec.h"
+#include "iris_vpu_buffer.h"
+
+#define DEFAULT_WIDTH 320
+#define DEFAULT_HEIGHT 240
+#define DEFAULT_CODEC_ALIGNMENT 16
+
+int iris_vdec_inst_init(struct iris_inst *inst)
+{
+	struct iris_core *core = inst->core;
+	struct v4l2_format *f;
+
+	inst->fmt_src  = kzalloc(sizeof(*inst->fmt_src), GFP_KERNEL);
+	inst->fmt_dst  = kzalloc(sizeof(*inst->fmt_dst), GFP_KERNEL);
+
+	inst->fw_min_count = MIN_BUFFERS;
+
+	f = inst->fmt_src;
+	f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+	f->fmt.pix_mp.width = DEFAULT_WIDTH;
+	f->fmt.pix_mp.height = DEFAULT_HEIGHT;
+	f->fmt.pix_mp.pixelformat = V4L2_PIX_FMT_H264;
+	f->fmt.pix_mp.num_planes = 1;
+	f->fmt.pix_mp.plane_fmt[0].bytesperline = 0;
+	f->fmt.pix_mp.plane_fmt[0].sizeimage = iris_get_buffer_size(inst, BUF_INPUT);
+	f->fmt.pix_mp.field = V4L2_FIELD_NONE;
+	inst->buffers[BUF_INPUT].min_count = iris_vpu_buf_count(inst, BUF_INPUT);
+	inst->buffers[BUF_INPUT].size = f->fmt.pix_mp.plane_fmt[0].sizeimage;
+
+	f = inst->fmt_dst;
+	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+	f->fmt.pix_mp.pixelformat = V4L2_PIX_FMT_NV12;
+	f->fmt.pix_mp.width = ALIGN(DEFAULT_WIDTH, 128);
+	f->fmt.pix_mp.height = ALIGN(DEFAULT_HEIGHT, 32);
+	f->fmt.pix_mp.num_planes = 1;
+	f->fmt.pix_mp.plane_fmt[0].bytesperline = ALIGN(DEFAULT_WIDTH, 128);
+	f->fmt.pix_mp.plane_fmt[0].sizeimage = iris_get_buffer_size(inst, BUF_OUTPUT);
+	f->fmt.pix_mp.field = V4L2_FIELD_NONE;
+	f->fmt.pix_mp.colorspace = V4L2_COLORSPACE_DEFAULT;
+	f->fmt.pix_mp.xfer_func = V4L2_XFER_FUNC_DEFAULT;
+	f->fmt.pix_mp.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+	f->fmt.pix_mp.quantization = V4L2_QUANTIZATION_DEFAULT;
+	inst->buffers[BUF_OUTPUT].min_count = iris_vpu_buf_count(inst, BUF_OUTPUT);
+	inst->buffers[BUF_OUTPUT].size = f->fmt.pix_mp.plane_fmt[0].sizeimage;
+
+	memcpy(&inst->fw_caps[0], &core->inst_fw_caps[0],
+	       INST_FW_CAP_MAX * sizeof(struct platform_inst_fw_cap));
+
+	return iris_ctrls_init(inst);
+}
+
+void iris_vdec_inst_deinit(struct iris_inst *inst)
+{
+	kfree(inst->fmt_dst);
+	kfree(inst->fmt_src);
+}
+
+int iris_vdec_enum_fmt(struct iris_inst *inst, struct v4l2_fmtdesc *f)
+{
+	switch (f->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		f->pixelformat = V4L2_PIX_FMT_H264;
+		f->flags = V4L2_FMT_FLAG_COMPRESSED | V4L2_FMT_FLAG_DYN_RESOLUTION;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		f->pixelformat = V4L2_PIX_FMT_NV12;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int iris_vdec_try_fmt(struct iris_inst *inst, struct v4l2_format *f)
+{
+	struct v4l2_pix_format_mplane *pixmp = &f->fmt.pix_mp;
+	struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
+	struct v4l2_format *f_inst;
+	struct vb2_queue *src_q;
+
+	memset(pixmp->reserved, 0, sizeof(pixmp->reserved));
+	switch (f->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		if (f->fmt.pix_mp.pixelformat != V4L2_PIX_FMT_H264) {
+			f_inst = inst->fmt_src;
+			f->fmt.pix_mp.width = f_inst->fmt.pix_mp.width;
+			f->fmt.pix_mp.height = f_inst->fmt.pix_mp.height;
+			f->fmt.pix_mp.pixelformat = f_inst->fmt.pix_mp.pixelformat;
+		}
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		if (f->fmt.pix_mp.pixelformat != V4L2_PIX_FMT_NV12) {
+			f_inst = inst->fmt_dst;
+			f->fmt.pix_mp.pixelformat = f_inst->fmt.pix_mp.pixelformat;
+			f->fmt.pix_mp.width = f_inst->fmt.pix_mp.width;
+			f->fmt.pix_mp.height = f_inst->fmt.pix_mp.height;
+		}
+
+		src_q = v4l2_m2m_get_src_vq(m2m_ctx);
+		if (vb2_is_streaming(src_q)) {
+			f_inst = inst->fmt_src;
+			f->fmt.pix_mp.height = f_inst->fmt.pix_mp.height;
+			f->fmt.pix_mp.width = f_inst->fmt.pix_mp.width;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (pixmp->field == V4L2_FIELD_ANY)
+		pixmp->field = V4L2_FIELD_NONE;
+
+	pixmp->num_planes = 1;
+
+	return 0;
+}
+
+int iris_vdec_s_fmt(struct iris_inst *inst, struct v4l2_format *f)
+{
+	struct v4l2_format *fmt, *output_fmt;
+	struct vb2_queue *q;
+	u32 codec_align;
+
+	q = v4l2_m2m_get_vq(inst->m2m_ctx, f->type);
+	if (!q)
+		return -EINVAL;
+
+	if (vb2_is_busy(q))
+		return -EBUSY;
+
+	iris_vdec_try_fmt(inst, f);
+
+	switch (f->type) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		if (f->fmt.pix_mp.pixelformat != V4L2_PIX_FMT_H264)
+			return -EINVAL;
+
+		fmt = inst->fmt_src;
+		fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+
+		codec_align = DEFAULT_CODEC_ALIGNMENT;
+		fmt->fmt.pix_mp.width = ALIGN(f->fmt.pix_mp.width, codec_align);
+		fmt->fmt.pix_mp.height = ALIGN(f->fmt.pix_mp.height, codec_align);
+		fmt->fmt.pix_mp.num_planes = 1;
+		fmt->fmt.pix_mp.plane_fmt[0].bytesperline = 0;
+		fmt->fmt.pix_mp.plane_fmt[0].sizeimage = iris_get_buffer_size(inst, BUF_INPUT);
+		inst->buffers[BUF_INPUT].min_count = iris_vpu_buf_count(inst, BUF_INPUT);
+		inst->buffers[BUF_INPUT].size = fmt->fmt.pix_mp.plane_fmt[0].sizeimage;
+
+		fmt->fmt.pix_mp.colorspace = f->fmt.pix_mp.colorspace;
+		fmt->fmt.pix_mp.xfer_func = f->fmt.pix_mp.xfer_func;
+		fmt->fmt.pix_mp.ycbcr_enc = f->fmt.pix_mp.ycbcr_enc;
+		fmt->fmt.pix_mp.quantization = f->fmt.pix_mp.quantization;
+
+		output_fmt = inst->fmt_dst;
+		output_fmt->fmt.pix_mp.colorspace = f->fmt.pix_mp.colorspace;
+		output_fmt->fmt.pix_mp.xfer_func = f->fmt.pix_mp.xfer_func;
+		output_fmt->fmt.pix_mp.ycbcr_enc = f->fmt.pix_mp.ycbcr_enc;
+		output_fmt->fmt.pix_mp.quantization = f->fmt.pix_mp.quantization;
+
+		inst->crop.left = 0;
+		inst->crop.top = 0;
+		inst->crop.width = f->fmt.pix_mp.width;
+		inst->crop.height = f->fmt.pix_mp.height;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		fmt = inst->fmt_dst;
+		fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+		if (fmt->fmt.pix_mp.pixelformat != V4L2_PIX_FMT_NV12)
+			return -EINVAL;
+		fmt->fmt.pix_mp.pixelformat = f->fmt.pix_mp.pixelformat;
+		fmt->fmt.pix_mp.width = ALIGN(f->fmt.pix_mp.width, 128);
+		fmt->fmt.pix_mp.height = ALIGN(f->fmt.pix_mp.height, 32);
+		fmt->fmt.pix_mp.num_planes = 1;
+		fmt->fmt.pix_mp.plane_fmt[0].bytesperline = ALIGN(f->fmt.pix_mp.width, 128);
+		fmt->fmt.pix_mp.plane_fmt[0].sizeimage = iris_get_buffer_size(inst, BUF_OUTPUT);
+		inst->buffers[BUF_OUTPUT].min_count = iris_vpu_buf_count(inst, BUF_OUTPUT);
+		inst->buffers[BUF_OUTPUT].size = fmt->fmt.pix_mp.plane_fmt[0].sizeimage;
+
+		inst->crop.top = 0;
+		inst->crop.left = 0;
+		inst->crop.width = f->fmt.pix_mp.width;
+		inst->crop.height = f->fmt.pix_mp.height;
+		break;
+	default:
+		return -EINVAL;
+	}
+	memcpy(f, fmt, sizeof(*fmt));
+
+	return 0;
+}
+
+int iris_vdec_subscribe_event(struct iris_inst *inst, const struct v4l2_event_subscription *sub)
+{
+	int ret = 0;
+
+	switch (sub->type) {
+	case V4L2_EVENT_EOS:
+		ret = v4l2_event_subscribe(&inst->fh, sub, 0, NULL);
+		break;
+	case V4L2_EVENT_SOURCE_CHANGE:
+		ret = v4l2_src_change_event_subscribe(&inst->fh, sub);
+		break;
+	case V4L2_EVENT_CTRL:
+		ret = v4l2_ctrl_subscribe_event(&inst->fh, sub);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+void iris_vdec_src_change(struct iris_inst *inst)
+{
+	struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
+	struct v4l2_event event = {0};
+	struct vb2_queue *src_q;
+
+	src_q = v4l2_m2m_get_src_vq(m2m_ctx);
+	if (!vb2_is_streaming(src_q))
+		return;
+
+	event.type = V4L2_EVENT_SOURCE_CHANGE;
+	event.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION;
+	v4l2_event_queue_fh(&inst->fh, &event);
+}
+
+static int iris_vdec_get_num_queued_buffers(struct iris_inst *inst,
+					    enum iris_buffer_type type)
+{
+	struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
+	struct v4l2_m2m_buffer *buffer, *n;
+	struct iris_buffer *buf;
+	u32 count = 0;
+
+	switch (type) {
+	case BUF_INPUT:
+		v4l2_m2m_for_each_src_buf_safe(m2m_ctx, buffer, n) {
+			buf = to_iris_buffer(&buffer->vb);
+			if (!(buf->attr & BUF_ATTR_QUEUED))
+				continue;
+			count++;
+		}
+		return count;
+	case BUF_OUTPUT:
+		v4l2_m2m_for_each_dst_buf_safe(m2m_ctx, buffer, n) {
+			buf = to_iris_buffer(&buffer->vb);
+			if (!(buf->attr & BUF_ATTR_QUEUED))
+				continue;
+			count++;
+		}
+		return count;
+	default:
+		return count;
+	}
+}
+
+static void iris_vdec_flush_deferred_buffers(struct iris_inst *inst,
+					     enum iris_buffer_type type)
+{
+	struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
+	struct v4l2_m2m_buffer *buffer, *n;
+	struct iris_buffer *buf;
+
+	if (type == BUF_INPUT) {
+		v4l2_m2m_for_each_src_buf_safe(m2m_ctx, buffer, n) {
+			buf = to_iris_buffer(&buffer->vb);
+			if (buf->attr & BUF_ATTR_DEFERRED) {
+				if (!(buf->attr & BUF_ATTR_BUFFER_DONE)) {
+					buf->attr |= BUF_ATTR_BUFFER_DONE;
+					buf->data_size = 0;
+					iris_vb2_buffer_done(inst, buf);
+				}
+			}
+		}
+	} else {
+		v4l2_m2m_for_each_dst_buf_safe(m2m_ctx, buffer, n) {
+			buf = to_iris_buffer(&buffer->vb);
+			if (buf->attr & BUF_ATTR_DEFERRED) {
+				if (!(buf->attr & BUF_ATTR_BUFFER_DONE)) {
+					buf->attr |= BUF_ATTR_BUFFER_DONE;
+					buf->data_size = 0;
+					iris_vb2_buffer_done(inst, buf);
+				}
+			}
+		}
+	}
+}
+
+static void iris_vdec_kill_session(struct iris_inst *inst)
+{
+	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
+
+	if (!inst->session_id)
+		return;
+
+	hfi_ops->session_close(inst);
+	iris_inst_change_state(inst, IRIS_INST_ERROR);
+}
+
+int iris_vdec_session_streamoff(struct iris_inst *inst, u32 plane)
+{
+	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
+	enum iris_buffer_type buffer_type;
+	u32 count;
+	int ret;
+
+	switch (plane) {
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		buffer_type = BUF_INPUT;
+		break;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+		buffer_type = BUF_OUTPUT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = hfi_ops->session_stop(inst, plane);
+	if (ret)
+		goto error;
+
+	count = iris_vdec_get_num_queued_buffers(inst, buffer_type);
+	if (count) {
+		ret = -EINVAL;
+		goto error;
+	}
+
+	ret = iris_inst_state_change_streamoff(inst, plane);
+	if (ret)
+		goto error;
+
+	iris_vdec_flush_deferred_buffers(inst, buffer_type);
+
+	return 0;
+
+error:
+	iris_vdec_kill_session(inst);
+	iris_vdec_flush_deferred_buffers(inst, buffer_type);
+
+	return ret;
+}
+
+static int iris_vdec_process_streamon_input(struct iris_inst *inst)
+{
+	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
+	enum iris_inst_sub_state set_sub_state = 0;
+	int ret;
+
+	iris_scale_power(inst);
+
+	ret = hfi_ops->session_start(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+	if (ret)
+		return ret;
+
+	if (inst->sub_state & IRIS_INST_SUB_INPUT_PAUSE) {
+		ret = iris_inst_change_sub_state(inst, IRIS_INST_SUB_INPUT_PAUSE, 0);
+		if (ret)
+			return ret;
+	}
+
+	if (inst->sub_state & IRIS_INST_SUB_DRC ||
+	    inst->sub_state & IRIS_INST_SUB_DRAIN ||
+	    inst->sub_state & IRIS_INST_SUB_FIRST_IPSC) {
+		if (!(inst->sub_state & IRIS_INST_SUB_INPUT_PAUSE)) {
+			if (hfi_ops->session_pause) {
+				ret = hfi_ops->session_pause(inst,
+							     V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+				if (ret)
+					return ret;
+			}
+			set_sub_state = IRIS_INST_SUB_INPUT_PAUSE;
+		}
+	}
+
+	ret = iris_inst_state_change_streamon(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+	if (ret)
+		return ret;
+
+	return iris_inst_change_sub_state(inst, 0, set_sub_state);
+}
+
+int iris_vdec_streamon_input(struct iris_inst *inst)
+{
+	int ret;
+
+	ret = iris_set_properties(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+	if (ret)
+		return ret;
+
+	ret = iris_alloc_and_queue_persist_bufs(inst);
+	if (ret)
+		return ret;
+
+	iris_get_internal_buffers(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+
+	ret = iris_destroy_internal_buffers(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+	if (ret)
+		return ret;
+
+	ret = iris_create_internal_buffers(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+	if (ret)
+		return ret;
+
+	ret = iris_queue_internal_buffers(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+	if (ret)
+		return ret;
+
+	return iris_vdec_process_streamon_input(inst);
+}
+
+static int iris_vdec_process_streamon_output(struct iris_inst *inst)
+{
+	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
+	bool drain_active = false, drc_active = false;
+	enum iris_inst_sub_state clear_sub_state = 0;
+	int ret = 0;
+
+	iris_scale_power(inst);
+
+	drain_active = inst->sub_state & IRIS_INST_SUB_DRAIN &&
+		inst->sub_state & IRIS_INST_SUB_DRAIN_LAST;
+
+	drc_active = inst->sub_state & IRIS_INST_SUB_DRC &&
+		inst->sub_state & IRIS_INST_SUB_DRC_LAST;
+
+	if (drc_active)
+		clear_sub_state = IRIS_INST_SUB_DRC | IRIS_INST_SUB_DRC_LAST;
+	else if (drain_active)
+		clear_sub_state = IRIS_INST_SUB_DRAIN | IRIS_INST_SUB_DRAIN_LAST;
+
+	if (inst->sub_state & IRIS_INST_SUB_INPUT_PAUSE) {
+		ret = iris_alloc_and_queue_input_int_bufs(inst);
+		if (ret)
+			return ret;
+		ret = iris_set_stage(inst, STAGE);
+		if (ret)
+			return ret;
+		ret = iris_set_pipe(inst, PIPE);
+		if (ret)
+			return ret;
+	}
+
+	if (inst->state == IRIS_INST_INPUT_STREAMING &&
+	    inst->sub_state & IRIS_INST_SUB_INPUT_PAUSE) {
+		if (!drain_active)
+			ret = hfi_ops->session_resume_drc(inst,
+							  V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+		else if (hfi_ops->session_resume_drain)
+			ret = hfi_ops->session_resume_drain(inst,
+							    V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+		if (ret)
+			return ret;
+		clear_sub_state |= IRIS_INST_SUB_INPUT_PAUSE;
+	}
+
+	if (inst->sub_state & IRIS_INST_SUB_FIRST_IPSC)
+		clear_sub_state |= IRIS_INST_SUB_FIRST_IPSC;
+
+	ret = hfi_ops->session_start(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+	if (ret)
+		return ret;
+
+	if (inst->sub_state & IRIS_INST_SUB_OUTPUT_PAUSE)
+		clear_sub_state |= IRIS_INST_SUB_OUTPUT_PAUSE;
+
+	ret = iris_inst_state_change_streamon(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+	if (ret)
+		return ret;
+
+	return iris_inst_change_sub_state(inst, clear_sub_state, 0);
+}
+
+int iris_vdec_streamon_output(struct iris_inst *inst)
+{
+	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
+	int ret;
+
+	ret = hfi_ops->session_set_config_params(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+	if (ret)
+		return ret;
+
+	iris_get_internal_buffers(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+
+	ret = iris_destroy_internal_buffers(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+	if (ret)
+		return ret;
+
+	ret = iris_create_internal_buffers(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+	if (ret)
+		return ret;
+
+	ret = iris_vdec_process_streamon_output(inst);
+	if (ret)
+		goto error;
+
+	ret = iris_queue_internal_buffers(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+	if (ret)
+		goto error;
+
+	return ret;
+
+error:
+	iris_vdec_session_streamoff(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+
+	return ret;
+}
+
+static int
+iris_vdec_vb2_buffer_to_driver(struct vb2_buffer *vb2, struct iris_buffer *buf)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb2);
+
+	buf->type = iris_v4l2_type_to_driver(vb2->type);
+	buf->index = vb2->index;
+	buf->fd = vb2->planes[0].m.fd;
+	buf->buffer_size = vb2->planes[0].length;
+	buf->data_offset = vb2->planes[0].data_offset;
+	buf->data_size = vb2->planes[0].bytesused - vb2->planes[0].data_offset;
+	buf->flags = vbuf->flags;
+	buf->timestamp = vb2->timestamp;
+	buf->attr = 0;
+
+	return 0;
+}
+
+static void
+iris_set_ts_metadata(struct iris_inst *inst, struct vb2_v4l2_buffer *vbuf)
+{
+	u32 mask = V4L2_BUF_FLAG_TIMECODE | V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
+	struct vb2_buffer *vb = &vbuf->vb2_buf;
+	u64 ts_us = vb->timestamp;
+
+	if (inst->metadata_idx >= ARRAY_SIZE(inst->tss))
+		inst->metadata_idx = 0;
+
+	do_div(ts_us, NSEC_PER_USEC);
+
+	inst->tss[inst->metadata_idx].flags = vbuf->flags & mask;
+	inst->tss[inst->metadata_idx].tc = vbuf->timecode;
+	inst->tss[inst->metadata_idx].ts_us = ts_us;
+	inst->tss[inst->metadata_idx].ts_ns = vb->timestamp;
+
+	inst->metadata_idx++;
+}
+
+int iris_vdec_qbuf(struct iris_inst *inst, struct vb2_v4l2_buffer *vbuf)
+{
+	struct iris_buffer *buf = to_iris_buffer(vbuf);
+	struct vb2_buffer *vb2 = &vbuf->vb2_buf;
+	struct vb2_queue *q;
+	int ret;
+
+	ret = iris_vdec_vb2_buffer_to_driver(vb2, buf);
+	if (ret)
+		return ret;
+
+	if (buf->type == BUF_INPUT)
+		iris_set_ts_metadata(inst, vbuf);
+
+	q = v4l2_m2m_get_vq(inst->m2m_ctx, vb2->type);
+	if (!vb2_is_streaming(q)) {
+		buf->attr |= BUF_ATTR_DEFERRED;
+		return 0;
+	}
+
+	iris_scale_power(inst);
+
+	return iris_queue_buffer(inst, buf);
+}
+
+int iris_vdec_start_cmd(struct iris_inst *inst)
+{
+	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
+	enum iris_inst_sub_state clear_sub_state = 0;
+	struct vb2_queue *dst_vq;
+	int ret;
+
+	dst_vq = v4l2_m2m_get_dst_vq(inst->m2m_ctx);
+
+	if (inst->sub_state & IRIS_INST_SUB_DRC &&
+	    inst->sub_state & IRIS_INST_SUB_DRC_LAST) {
+		vb2_clear_last_buffer_dequeued(dst_vq);
+		clear_sub_state = IRIS_INST_SUB_DRC | IRIS_INST_SUB_DRC_LAST;
+
+		if (inst->sub_state & IRIS_INST_SUB_INPUT_PAUSE) {
+			ret = hfi_ops->session_resume_drc(inst,
+							  V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+			if (ret)
+				return ret;
+			clear_sub_state |= IRIS_INST_SUB_INPUT_PAUSE;
+		}
+		if (inst->sub_state & IRIS_INST_SUB_OUTPUT_PAUSE) {
+			ret = hfi_ops->session_resume_drc(inst,
+							  V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+			if (ret)
+				return ret;
+			clear_sub_state |= IRIS_INST_SUB_OUTPUT_PAUSE;
+		}
+	} else if (inst->sub_state & IRIS_INST_SUB_DRAIN &&
+		   inst->sub_state & IRIS_INST_SUB_DRAIN_LAST) {
+		vb2_clear_last_buffer_dequeued(dst_vq);
+		clear_sub_state = IRIS_INST_SUB_DRAIN | IRIS_INST_SUB_DRAIN_LAST;
+		if (inst->sub_state & IRIS_INST_SUB_INPUT_PAUSE) {
+			if (hfi_ops->session_resume_drain) {
+				ret =
+				hfi_ops->session_resume_drain(inst,
+							      V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+				if (ret)
+					return ret;
+			}
+
+			clear_sub_state |= IRIS_INST_SUB_INPUT_PAUSE;
+		}
+		if (inst->sub_state & IRIS_INST_SUB_OUTPUT_PAUSE) {
+			if (hfi_ops->session_resume_drain) {
+				ret =
+				hfi_ops->session_resume_drain(inst,
+							      V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+				if (ret)
+					return ret;
+			}
+
+			clear_sub_state |= IRIS_INST_SUB_OUTPUT_PAUSE;
+		}
+	} else {
+		dev_err(inst->core->dev, "start called before receiving last_flag\n");
+		iris_inst_change_state(inst, IRIS_INST_ERROR);
+		return -EBUSY;
+	}
+
+	return iris_inst_change_sub_state(inst, clear_sub_state, 0);
+}
+
+int iris_vdec_stop_cmd(struct iris_inst *inst)
+{
+	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
+	int ret;
+
+	ret = hfi_ops->session_drain(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+	if (ret)
+		return ret;
+
+	return iris_inst_change_sub_state(inst, 0, IRIS_INST_SUB_DRAIN);
+}