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Message-ID: <d8313fee-3f42-49cc-ba24-865dd60110a2@oss.qualcomm.com>
Date: Tue, 30 Dec 2025 11:17:42 +0530
From: Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>
To: Wangao Wang <wangao.wang@....qualcomm.com>,
Vikash Garodia <vikash.garodia@....qualcomm.com>,
Abhinav Kumar <abhinav.kumar@...ux.dev>,
Bryan O'Donoghue <bod@...nel.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: quic_qiweil@...cinc.com, Renjiang Han <renjiang.han@....qualcomm.com>,
linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/6] media: qcom: iris: Add Long-Term Reference support
for encoder
On 12/19/2025 1:12 PM, Wangao Wang wrote:
> Add Long-Term Reference(LTR) frame support for both gen1 and gen2
> encoders by enabling the following V4L2 controls:
> V4L2_CID_MPEG_VIDEO_LTR_COUNT
> V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES
> V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX
>
> Signed-off-by: Wangao Wang <wangao.wang@....qualcomm.com>> ---
> drivers/media/platform/qcom/iris/iris_ctrls.c | 128 +++++++++++++++++++++
> drivers/media/platform/qcom/iris/iris_ctrls.h | 5 +
> .../platform/qcom/iris/iris_hfi_gen1_command.c | 25 ++++
> .../platform/qcom/iris/iris_hfi_gen1_defines.h | 24 ++++
> .../platform/qcom/iris/iris_hfi_gen2_defines.h | 3 +
> .../platform/qcom/iris/iris_platform_common.h | 6 +
> .../media/platform/qcom/iris/iris_platform_gen1.c | 30 +++++
> .../media/platform/qcom/iris/iris_platform_gen2.c | 30 +++++
> drivers/media/platform/qcom/iris/iris_vpu_buffer.c | 20 +++-
> 9 files changed, 267 insertions(+), 4 deletions(-)
>
Reviewed-by: Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>
Thanks,
Dikshita
> diff --git a/drivers/media/platform/qcom/iris/iris_ctrls.c b/drivers/media/platform/qcom/iris/iris_ctrls.c
> index eae4fedc929e980eb001a5a6625159958d53a3d1..428203af725ab5697ee42b5adf9557c65fafd7f4 100644
> --- a/drivers/media/platform/qcom/iris/iris_ctrls.c
> +++ b/drivers/media/platform/qcom/iris/iris_ctrls.c
> @@ -108,6 +108,12 @@ static enum platform_inst_fw_cap_type iris_get_cap_id(u32 id)
> return IR_TYPE;
> case V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD:
> return IR_PERIOD;
> + case V4L2_CID_MPEG_VIDEO_LTR_COUNT:
> + return LTR_COUNT;
> + case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES:
> + return USE_LTR;
> + case V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX:
> + return MARK_LTR;
> default:
> return INST_FW_CAP_MAX;
> }
> @@ -205,6 +211,12 @@ static u32 iris_get_v4l2_id(enum platform_inst_fw_cap_type cap_id)
> return V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD_TYPE;
> case IR_PERIOD:
> return V4L2_CID_MPEG_VIDEO_INTRA_REFRESH_PERIOD;
> + case LTR_COUNT:
> + return V4L2_CID_MPEG_VIDEO_LTR_COUNT;
> + case USE_LTR:
> + return V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES;
> + case MARK_LTR:
> + return V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX;
> default:
> return 0;
> }
> @@ -1025,6 +1037,122 @@ int iris_set_ir_period_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_ty
> &ir_period, sizeof(u32));
> }
>
> +int iris_set_ltr_count_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + u32 ltr_count = inst->fw_caps[cap_id].value;
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> + struct hfi_ltr_mode ltr_mode;
> +
> + if (!ltr_count)
> + return -EINVAL;
> +
> + ltr_mode.count = ltr_count;
> + ltr_mode.mode = HFI_LTR_MODE_MANUAL;
> + ltr_mode.trust_mode = 1;
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_STRUCTURE,
> + <r_mode, sizeof(ltr_mode));
> +}
> +
> +int iris_set_use_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + struct vb2_queue *sq = v4l2_m2m_get_src_vq(inst->m2m_ctx);
> + struct vb2_queue *dq = v4l2_m2m_get_dst_vq(inst->m2m_ctx);
> + u32 ltr_count = inst->fw_caps[LTR_COUNT].value;
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> + struct hfi_ltr_use ltr_use;
> +
> + if (!vb2_is_streaming(sq) && !vb2_is_streaming(dq))
> + return -EINVAL;
> +
> + if (!ltr_count)
> + return -EINVAL;
> +
> + ltr_use.ref_ltr = inst->fw_caps[cap_id].value;
> + ltr_use.use_constrnt = true;
> + ltr_use.frames = 0;
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_STRUCTURE,
> + <r_use, sizeof(ltr_use));
> +}
> +
> +int iris_set_mark_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + struct vb2_queue *sq = v4l2_m2m_get_src_vq(inst->m2m_ctx);
> + struct vb2_queue *dq = v4l2_m2m_get_dst_vq(inst->m2m_ctx);
> + u32 ltr_count = inst->fw_caps[LTR_COUNT].value;
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> + struct hfi_ltr_mark ltr_mark;
> +
> + if (!vb2_is_streaming(sq) && !vb2_is_streaming(dq))
> + return -EINVAL;
> +
> + if (!ltr_count)
> + return -EINVAL;
> +
> + ltr_mark.mark_frame = inst->fw_caps[cap_id].value;
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_STRUCTURE,
> + <r_mark, sizeof(ltr_mark));
> +}
> +
> +int iris_set_ltr_count_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + u32 ltr_count = inst->fw_caps[cap_id].value;
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> +
> + if (!ltr_count)
> + return -EINVAL;
> +
> + if (inst->hfi_rc_type == HFI_RC_CBR_VFR ||
> + inst->hfi_rc_type == HFI_RC_CBR_CFR ||
> + inst->hfi_rc_type == HFI_RC_OFF) {
> + inst->fw_caps[LTR_COUNT].value = 0;
> + return -EINVAL;
> + }
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_U32,
> + <r_count, sizeof(u32));
> +}
> +
> +int iris_set_use_and_mark_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id)
> +{
> + const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> + struct vb2_queue *sq = v4l2_m2m_get_src_vq(inst->m2m_ctx);
> + struct vb2_queue *dq = v4l2_m2m_get_dst_vq(inst->m2m_ctx);
> + u32 ltr_count = inst->fw_caps[LTR_COUNT].value;
> + u32 hfi_val = inst->fw_caps[cap_id].value;
> + u32 hfi_id = inst->fw_caps[cap_id].hfi_id;
> +
> + if (!vb2_is_streaming(sq) && !vb2_is_streaming(dq))
> + return -EINVAL;
> +
> + if (!ltr_count || hfi_val == INVALID_DEFAULT_MARK_OR_USE_LTR)
> + return -EINVAL;
> +
> + return hfi_ops->session_set_property(inst, hfi_id,
> + HFI_HOST_FLAGS_NONE,
> + iris_get_port_info(inst, cap_id),
> + HFI_PAYLOAD_U32,
> + &hfi_val, sizeof(u32));
> +}
> +
> int iris_set_properties(struct iris_inst *inst, u32 plane)
> {
> const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
> diff --git a/drivers/media/platform/qcom/iris/iris_ctrls.h b/drivers/media/platform/qcom/iris/iris_ctrls.h
> index a0d5338bdc910bd30407132e8b700c333ad74e4c..996c83fdc6f492dc252771129fc1d62e8b7a7e07 100644
> --- a/drivers/media/platform/qcom/iris/iris_ctrls.h
> +++ b/drivers/media/platform/qcom/iris/iris_ctrls.h
> @@ -36,6 +36,11 @@ int iris_set_rotation(struct iris_inst *inst, enum platform_inst_fw_cap_type cap
> int iris_set_flip(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_ir_period_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_ir_period_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_ltr_count_gen1(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_ltr_count_gen2(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_use_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_mark_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> +int iris_set_use_and_mark_ltr(struct iris_inst *inst, enum platform_inst_fw_cap_type cap_id);
> int iris_set_properties(struct iris_inst *inst, u32 plane);
>
> #endif
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> index 4d9632ba86bc8f629cee6d726eb44efcdeba2475..139e7a9321d30d3e348671f99b0fa81afed4827e 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
> @@ -693,6 +693,31 @@ iris_hfi_gen1_packet_session_set_property(struct hfi_session_set_property_pkt *p
> packet->shdr.hdr.size += sizeof(u32) + sizeof(*intra_refresh);
> break;
> }
> + case HFI_PROPERTY_PARAM_VENC_LTRMODE: {
> + struct hfi_ltr_mode *in = pdata, *ltr_mode = prop_data;
> +
> + ltr_mode->mode = in->mode;
> + ltr_mode->count = in->count;
> + ltr_mode->trust_mode = in->trust_mode;
> + packet->shdr.hdr.size += sizeof(u32) + sizeof(*ltr_mode);
> + break;
> + }
> + case HFI_PROPERTY_CONFIG_VENC_USELTRFRAME: {
> + struct hfi_ltr_use *in = pdata, *ltr_use = prop_data;
> +
> + ltr_use->frames = in->frames;
> + ltr_use->ref_ltr = in->ref_ltr;
> + ltr_use->use_constrnt = in->use_constrnt;
> + packet->shdr.hdr.size += sizeof(u32) + sizeof(*ltr_use);
> + break;
> + }
> + case HFI_PROPERTY_CONFIG_VENC_MARKLTRFRAME: {
> + struct hfi_ltr_mark *in = pdata, *ltr_mark = prop_data;
> +
> + ltr_mark->mark_frame = in->mark_frame;
> + packet->shdr.hdr.size += sizeof(u32) + sizeof(*ltr_mark);
> + break;
> + }
> default:
> return -EINVAL;
> }
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen1_defines.h b/drivers/media/platform/qcom/iris/iris_hfi_gen1_defines.h
> index 04c79ee0463d7f32a2042044fe4564718cc01561..34249fc0d047918c2463517b8303e30df3666b97 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen1_defines.h
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen1_defines.h
> @@ -147,8 +147,16 @@
> #define HFI_INTRA_REFRESH_RANDOM 0x5
>
> #define HFI_PROPERTY_PARAM_VENC_INTRA_REFRESH 0x200500d
> +
> +#define HFI_LTR_MODE_DISABLE 0x0
> +#define HFI_LTR_MODE_MANUAL 0x1
> +#define HFI_LTR_MODE_PERIODIC 0x2
> +
> +#define HFI_PROPERTY_PARAM_VENC_LTRMODE 0x200501c
> #define HFI_PROPERTY_PARAM_VENC_MAX_NUM_B_FRAMES 0x2005020
> #define HFI_PROPERTY_CONFIG_VENC_TARGET_BITRATE 0x2006001
> +#define HFI_PROPERTY_CONFIG_VENC_MARKLTRFRAME 0x2006009
> +#define HFI_PROPERTY_CONFIG_VENC_USELTRFRAME 0x200600a
> #define HFI_PROPERTY_CONFIG_VENC_SYNC_FRAME_SEQUENCE_HEADER 0x2006008
>
> struct hfi_pkt_hdr {
> @@ -460,6 +468,22 @@ struct hfi_intra_refresh {
> u32 mbs;
> };
>
> +struct hfi_ltr_mode {
> + u32 mode;
> + u32 count;
> + u32 trust_mode;
> +};
> +
> +struct hfi_ltr_use {
> + u32 ref_ltr;
> + u32 use_constrnt;
> + u32 frames;
> +};
> +
> +struct hfi_ltr_mark {
> + u32 mark_frame;
> +};
> +
> struct hfi_event_data {
> u32 error;
> u32 height;
> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h b/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
> index f6a214a6815420f299be70f80732943d02168f0c..2b8c87c25a066ead30bb1b134bdc3fe1e84e8f05 100644
> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
> @@ -71,6 +71,9 @@ enum hfi_rate_control {
> #define HFI_PROP_MIN_QP_PACKED 0x0300012f
> #define HFI_PROP_MAX_QP_PACKED 0x03000130
> #define HFI_PROP_IR_RANDOM_PERIOD 0x03000131
> +#define HFI_PROP_LTR_COUNT 0x03000134
> +#define HFI_PROP_LTR_MARK 0x03000135
> +#define HFI_PROP_LTR_USE 0x03000136
> #define HFI_PROP_TOTAL_BITRATE 0x0300013b
> #define HFI_PROP_MAX_GOP_FRAMES 0x03000146
> #define HFI_PROP_MAX_B_FRAMES 0x03000147
> diff --git a/drivers/media/platform/qcom/iris/iris_platform_common.h b/drivers/media/platform/qcom/iris/iris_platform_common.h
> index dd0a4210a2647ff4dadf8d67b71c6f4a22deb548..c48dfb6d47734fadd4f2e4123c93560f55355b86 100644
> --- a/drivers/media/platform/qcom/iris/iris_platform_common.h
> +++ b/drivers/media/platform/qcom/iris/iris_platform_common.h
> @@ -29,6 +29,9 @@ struct iris_inst;
> #define MAX_QP_HEVC 63
> #define DEFAULT_QP 20
> #define BITRATE_DEFAULT 20000000
> +#define INVALID_DEFAULT_MARK_OR_USE_LTR -1
> +#define MAX_LTR_FRAME_COUNT_GEN1 4
> +#define MAX_LTR_FRAME_COUNT_GEN2 2
>
> enum stage_type {
> STAGE_1 = 1,
> @@ -148,6 +151,9 @@ enum platform_inst_fw_cap_type {
> VFLIP,
> IR_TYPE,
> IR_PERIOD,
> + LTR_COUNT,
> + USE_LTR,
> + MARK_LTR,
> INST_FW_CAP_MAX,
> };
>
> diff --git a/drivers/media/platform/qcom/iris/iris_platform_gen1.c b/drivers/media/platform/qcom/iris/iris_platform_gen1.c
> index e7645bd60eb46785e0110a34f3257f7c37bbfca5..13cee5f72a443b85136d30b41b589aeb0db8eb9a 100644
> --- a/drivers/media/platform/qcom/iris/iris_platform_gen1.c
> +++ b/drivers/media/platform/qcom/iris/iris_platform_gen1.c
> @@ -249,6 +249,36 @@ static const struct platform_inst_fw_cap inst_fw_cap_sm8250_enc[] = {
> .flags = CAP_FLAG_OUTPUT_PORT,
> .set = iris_set_ir_period_gen1,
> },
> + {
> + .cap_id = LTR_COUNT,
> + .min = 0,
> + .max = MAX_LTR_FRAME_COUNT_GEN1,
> + .step_or_mask = 1,
> + .value = 0,
> + .hfi_id = HFI_PROPERTY_PARAM_VENC_LTRMODE,
> + .flags = CAP_FLAG_OUTPUT_PORT,
> + .set = iris_set_ltr_count_gen1,
> + },
> + {
> + .cap_id = USE_LTR,
> + .min = 0,
> + .max = ((1 << MAX_LTR_FRAME_COUNT_GEN1) - 1),
> + .step_or_mask = 0,
> + .value = 0,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_USELTRFRAME,
> + .flags = CAP_FLAG_INPUT_PORT | CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_use_ltr,
> + },
> + {
> + .cap_id = MARK_LTR,
> + .min = 0,
> + .max = (MAX_LTR_FRAME_COUNT_GEN1 - 1),
> + .step_or_mask = 1,
> + .value = 0,
> + .hfi_id = HFI_PROPERTY_CONFIG_VENC_MARKLTRFRAME,
> + .flags = CAP_FLAG_INPUT_PORT | CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_mark_ltr,
> + },
> };
>
> static struct platform_inst_caps platform_inst_cap_sm8250 = {
> diff --git a/drivers/media/platform/qcom/iris/iris_platform_gen2.c b/drivers/media/platform/qcom/iris/iris_platform_gen2.c
> index 585f0aedc0eb5e80fd108929e1861101a7bab2be..99d8e1e59e6bfd5e4ab0fd2b5831f74c54b6e87d 100644
> --- a/drivers/media/platform/qcom/iris/iris_platform_gen2.c
> +++ b/drivers/media/platform/qcom/iris/iris_platform_gen2.c
> @@ -637,6 +637,36 @@ static const struct platform_inst_fw_cap inst_fw_cap_sm8550_enc[] = {
> CAP_FLAG_DYNAMIC_ALLOWED,
> .set = iris_set_ir_period_gen2,
> },
> + {
> + .cap_id = LTR_COUNT,
> + .min = 0,
> + .max = MAX_LTR_FRAME_COUNT_GEN2,
> + .step_or_mask = 1,
> + .value = 0,
> + .hfi_id = HFI_PROP_LTR_COUNT,
> + .flags = CAP_FLAG_OUTPUT_PORT,
> + .set = iris_set_ltr_count_gen2,
> + },
> + {
> + .cap_id = USE_LTR,
> + .min = 0,
> + .max = ((1 << MAX_LTR_FRAME_COUNT_GEN2) - 1),
> + .step_or_mask = 0,
> + .value = 0,
> + .hfi_id = HFI_PROP_LTR_USE,
> + .flags = CAP_FLAG_INPUT_PORT | CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_use_and_mark_ltr,
> + },
> + {
> + .cap_id = MARK_LTR,
> + .min = INVALID_DEFAULT_MARK_OR_USE_LTR,
> + .max = (MAX_LTR_FRAME_COUNT_GEN2 - 1),
> + .step_or_mask = 1,
> + .value = INVALID_DEFAULT_MARK_OR_USE_LTR,
> + .hfi_id = HFI_PROP_LTR_MARK,
> + .flags = CAP_FLAG_INPUT_PORT | CAP_FLAG_DYNAMIC_ALLOWED,
> + .set = iris_set_use_and_mark_ltr,
> + },
> };
>
> static struct platform_inst_caps platform_inst_cap_sm8550 = {
> diff --git a/drivers/media/platform/qcom/iris/iris_vpu_buffer.c b/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
> index 1e54ace966c74956208d88f06837b97b1fd48e17..b7413edfbc5646fbdee6139d1e6897d730e2c8d1 100644
> --- a/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
> +++ b/drivers/media/platform/qcom/iris/iris_vpu_buffer.c
> @@ -668,6 +668,19 @@ static u32 iris_vpu_enc_bin_size(struct iris_inst *inst)
> num_vpp_pipes, inst->hfi_rc_type);
> }
>
> +static inline u32 hfi_buffer_get_recon_count(struct iris_inst *inst)
> +{
> + u32 num_ref = 1;
> + u32 ltr_count;
> +
> + ltr_count = inst->fw_caps[LTR_COUNT].value;
> +
> + if (ltr_count)
> + num_ref = num_ref + ltr_count;
> +
> + return num_ref;
> +}
> +
> static inline
> u32 hfi_buffer_comv_enc(u32 frame_width, u32 frame_height, u32 lcu_size,
> u32 num_recon, u32 standard)
> @@ -693,7 +706,7 @@ static u32 iris_vpu_enc_comv_size(struct iris_inst *inst)
> {
> u32 height = iris_vpu_enc_get_bitstream_height(inst);
> u32 width = iris_vpu_enc_get_bitstream_width(inst);
> - u32 num_recon = 1;
> + u32 num_recon = hfi_buffer_get_recon_count(inst);
> u32 lcu_size = 16;
>
> if (inst->codec == V4L2_PIX_FMT_HEVC) {
> @@ -1402,10 +1415,9 @@ static u32 iris_vpu_enc_scratch2_size(struct iris_inst *inst)
> {
> u32 frame_height = iris_vpu_enc_get_bitstream_height(inst);
> u32 frame_width = iris_vpu_enc_get_bitstream_width(inst);
> - u32 num_ref = 1;
> + u32 num_ref = hfi_buffer_get_recon_count(inst);
>
> - return hfi_buffer_scratch2_enc(frame_width, frame_height, num_ref,
> - false);
> + return hfi_buffer_scratch2_enc(frame_width, frame_height, num_ref, false);
> }
>
> static u32 iris_vpu_enc_vpss_size(struct iris_inst *inst)
>
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