[PATCH v3 2/2] media: meson: vdec: add HEVC decode codec

[Christian Hewitt <christianshewitt@gmail.com>]

From: Maxime Jourdan <mjourdan@baylibre.com>

Add initial HEVC codec for the Amlogic GXBB/GXL/GXM SoCs using
the common "HEVC" decoder driver.

Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
[codec alignment to upstream changes and frame handling improvements]
Signed-off-by: Benjamin Roszak <benjamin545@gmail.com>
---
 drivers/staging/media/meson/vdec/Makefile     |    2 +-
 drivers/staging/media/meson/vdec/codec_hevc.c | 1463 +++++++++++++++++
 drivers/staging/media/meson/vdec/codec_hevc.h |   13 +
 drivers/staging/media/meson/vdec/esparser.c   |    3 +-
 drivers/staging/media/meson/vdec/hevc_regs.h  |    1 +
 .../staging/media/meson/vdec/vdec_platform.c  |   37 +
 6 files changed, 1517 insertions(+), 2 deletions(-)
 create mode 100644 drivers/staging/media/meson/vdec/codec_hevc.c
 create mode 100644 drivers/staging/media/meson/vdec/codec_hevc.h

diff --git a/drivers/staging/media/meson/vdec/Makefile b/drivers/staging/media/meson/vdec/Makefile
index 6e726af84ac9..16f848e456b9 100644
--- a/drivers/staging/media/meson/vdec/Makefile
+++ b/drivers/staging/media/meson/vdec/Makefile
@@ -3,6 +3,6 @@
 
 meson-vdec-objs = esparser.o vdec.o vdec_helpers.o vdec_platform.o
 meson-vdec-objs += vdec_1.o vdec_hevc.o
-meson-vdec-objs += codec_mpeg12.o codec_h264.o codec_hevc_common.o codec_vp9.o
+meson-vdec-objs += codec_mpeg12.o codec_h264.o codec_hevc_common.o codec_vp9.o codec_hevc.o
 
 obj-$(CONFIG_VIDEO_MESON_VDEC) += meson-vdec.o
diff --git a/drivers/staging/media/meson/vdec/codec_hevc.c b/drivers/staging/media/meson/vdec/codec_hevc.c
new file mode 100644
index 000000000000..b0d8623c3c7d
--- /dev/null
+++ b/drivers/staging/media/meson/vdec/codec_hevc.c
@@ -0,0 +1,1463 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Maxime Jourdan <mjourdan@baylibre.com>
+ * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
+ */
+
+#include <media/v4l2-mem2mem.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "codec_hevc.h"
+#include "dos_regs.h"
+#include "hevc_regs.h"
+#include "vdec_helpers.h"
+#include "codec_hevc_common.h"
+
+/* HEVC reg mapping */
+#define HEVC_DEC_STATUS_REG	HEVC_ASSIST_SCRATCH_0
+	#define HEVC_ACTION_DONE	0xff
+#define HEVC_RPM_BUFFER		HEVC_ASSIST_SCRATCH_1
+#define HEVC_SHORT_TERM_RPS	HEVC_ASSIST_SCRATCH_2
+#define HEVC_VPS_BUFFER		HEVC_ASSIST_SCRATCH_3
+#define HEVC_SPS_BUFFER		HEVC_ASSIST_SCRATCH_4
+#define HEVC_PPS_BUFFER		HEVC_ASSIST_SCRATCH_5
+#define HEVC_SAO_UP		HEVC_ASSIST_SCRATCH_6
+#define HEVC_STREAM_SWAP_BUFFER HEVC_ASSIST_SCRATCH_7
+#define H265_MMU_MAP_BUFFER	HEVC_ASSIST_SCRATCH_7
+#define HEVC_STREAM_SWAP_BUFFER2 HEVC_ASSIST_SCRATCH_8
+#define HEVC_sao_mem_unit	HEVC_ASSIST_SCRATCH_9
+#define HEVC_SAO_ABV		HEVC_ASSIST_SCRATCH_A
+#define HEVC_sao_vb_size	HEVC_ASSIST_SCRATCH_B
+#define HEVC_SAO_VB		HEVC_ASSIST_SCRATCH_C
+#define HEVC_SCALELUT		HEVC_ASSIST_SCRATCH_D
+#define HEVC_WAIT_FLAG		HEVC_ASSIST_SCRATCH_E
+#define RPM_CMD_REG		HEVC_ASSIST_SCRATCH_F
+#define LMEM_DUMP_ADR		HEVC_ASSIST_SCRATCH_F
+#define DEBUG_REG1		HEVC_ASSIST_SCRATCH_G
+#define HEVC_DECODE_MODE2	HEVC_ASSIST_SCRATCH_H
+#define NAL_SEARCH_CTL		HEVC_ASSIST_SCRATCH_I
+#define HEVC_DECODE_MODE	HEVC_ASSIST_SCRATCH_J
+	#define DECODE_MODE_SINGLE 0
+#define DECODE_STOP_POS		HEVC_ASSIST_SCRATCH_K
+#define HEVC_AUX_ADR		HEVC_ASSIST_SCRATCH_L
+#define HEVC_AUX_DATA_SIZE	HEVC_ASSIST_SCRATCH_M
+#define HEVC_DECODE_SIZE	HEVC_ASSIST_SCRATCH_N
+
+#define AMRISC_MAIN_REQ		 0x04
+
+/* HEVC Constants */
+#define MAX_REF_PIC_NUM		24
+#define MAX_REF_ACTIVE		16
+#define MAX_TILE_COL_NUM	10
+#define MAX_TILE_ROW_NUM	20
+#define MAX_SLICE_NUM		800
+#define INVALID_POC		0x80000000
+
+/* HEVC Workspace layout */
+#define MPRED_MV_BUF_SIZE 0x120000
+
+#define IPP_SIZE	0x4000
+#define SAO_ABV_SIZE	0x30000
+#define SAO_VB_SIZE	0x30000
+#define SH_TM_RPS_SIZE	0x800
+#define VPS_SIZE	0x800
+#define SPS_SIZE	0x800
+#define PPS_SIZE	0x2000
+#define SAO_UP_SIZE	0x2800
+#define SWAP_BUF_SIZE	0x800
+#define SWAP_BUF2_SIZE	0x800
+#define SCALELUT_SIZE	0x8000
+#define DBLK_PARA_SIZE	0x20000
+#define DBLK_DATA_SIZE	0x80000
+#define DBLK_DATA2_SIZE	0x80000
+#define MMU_VBH_SIZE	0x5000
+#define MPRED_ABV_SIZE	0x8000
+#define MPRED_MV_SIZE	(MPRED_MV_BUF_SIZE * MAX_REF_PIC_NUM)
+#define RPM_BUF_SIZE	0x100
+#define LMEM_SIZE	0xA00
+
+#define IPP_OFFSET       0x00
+#define SAO_ABV_OFFSET   (IPP_OFFSET + IPP_SIZE)
+#define SAO_VB_OFFSET    (SAO_ABV_OFFSET + SAO_ABV_SIZE)
+#define SH_TM_RPS_OFFSET (SAO_VB_OFFSET + SAO_VB_SIZE)
+#define VPS_OFFSET       (SH_TM_RPS_OFFSET + SH_TM_RPS_SIZE)
+#define SPS_OFFSET       (VPS_OFFSET + VPS_SIZE)
+#define PPS_OFFSET       (SPS_OFFSET + SPS_SIZE)
+#define SAO_UP_OFFSET    (PPS_OFFSET + PPS_SIZE)
+#define SWAP_BUF_OFFSET  (SAO_UP_OFFSET + SAO_UP_SIZE)
+#define SWAP_BUF2_OFFSET (SWAP_BUF_OFFSET + SWAP_BUF_SIZE)
+#define SCALELUT_OFFSET  (SWAP_BUF2_OFFSET + SWAP_BUF2_SIZE)
+#define DBLK_PARA_OFFSET (SCALELUT_OFFSET + SCALELUT_SIZE)
+#define DBLK_DATA_OFFSET (DBLK_PARA_OFFSET + DBLK_PARA_SIZE)
+#define DBLK_DATA2_OFFSET (DBLK_DATA_OFFSET + DBLK_DATA_SIZE)
+#define MMU_VBH_OFFSET   (DBLK_DATA2_OFFSET + DBLK_DATA2_SIZE)
+#define MPRED_ABV_OFFSET (MMU_VBH_OFFSET + MMU_VBH_SIZE)
+#define MPRED_MV_OFFSET  (MPRED_ABV_OFFSET + MPRED_ABV_SIZE)
+#define RPM_OFFSET       (MPRED_MV_OFFSET + MPRED_MV_SIZE)
+#define LMEM_OFFSET      (RPM_OFFSET + RPM_BUF_SIZE)
+
+/* ISR decode status */
+#define HEVC_DEC_IDLE                        0x0
+#define HEVC_NAL_UNIT_VPS                    0x1
+#define HEVC_NAL_UNIT_SPS                    0x2
+#define HEVC_NAL_UNIT_PPS                    0x3
+#define HEVC_NAL_UNIT_CODED_SLICE_SEGMENT    0x4
+#define HEVC_CODED_SLICE_SEGMENT_DAT         0x5
+#define HEVC_SLICE_DECODING                  0x6
+#define HEVC_NAL_UNIT_SEI                    0x7
+#define HEVC_SLICE_SEGMENT_DONE              0x8
+#define HEVC_NAL_SEARCH_DONE                 0x9
+#define HEVC_DECPIC_DATA_DONE                0xa
+#define HEVC_DECPIC_DATA_ERROR               0xb
+#define HEVC_SEI_DAT                         0xc
+#define HEVC_SEI_DAT_DONE                    0xd
+
+/* RPM misc_flag0 */
+#define PCM_LOOP_FILTER_DISABLED_FLAG_BIT		0
+#define PCM_ENABLE_FLAG_BIT				1
+#define LOOP_FILER_ACROSS_TILES_ENABLED_FLAG_BIT	2
+#define PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED_FLAG_BIT	3
+#define DEBLOCKING_FILTER_OVERRIDE_ENABLED_FLAG_BIT	4
+#define PPS_DEBLOCKING_FILTER_DISABLED_FLAG_BIT		5
+#define DEBLOCKING_FILTER_OVERRIDE_FLAG_BIT		6
+#define SLICE_DEBLOCKING_FILTER_DISABLED_FLAG_BIT	7
+#define SLICE_SAO_LUMA_FLAG_BIT				8
+#define SLICE_SAO_CHROMA_FLAG_BIT			9
+#define SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED_FLAG_BIT 10
+
+/* Constants for HEVC_MPRED_CTRL1 */
+#define AMVP_MAX_NUM_CANDS_MEM	3
+#define AMVP_MAX_NUM_CANDS	2
+#define NUM_CHROMA_MODE		5
+#define DM_CHROMA_IDX		36
+
+/* Buffer sizes */
+#define SIZE_WORKSPACE ALIGN(LMEM_OFFSET + LMEM_SIZE, 64 * SZ_1K)
+#define SIZE_AUX (SZ_1K * 16)
+#define SIZE_FRAME_MMU (0x1200 * 4)
+#define RPM_SIZE 0x80
+#define RPS_USED_BIT 14
+
+/* Data received from the HW in this form, do not rearrange */
+union rpm_param {
+	struct {
+		u16 data[RPM_SIZE];
+	} l;
+	struct {
+		u16 CUR_RPS[MAX_REF_ACTIVE];
+		u16 num_ref_idx_l0_active;
+		u16 num_ref_idx_l1_active;
+		u16 slice_type;
+		u16 slice_temporal_mvp_enable_flag;
+		u16 dependent_slice_segment_flag;
+		u16 slice_segment_address;
+		u16 num_title_rows_minus1;
+		u16 pic_width_in_luma_samples;
+		u16 pic_height_in_luma_samples;
+		u16 log2_min_coding_block_size_minus3;
+		u16 log2_diff_max_min_coding_block_size;
+		u16 log2_max_pic_order_cnt_lsb_minus4;
+		u16 POClsb;
+		u16 collocated_from_l0_flag;
+		u16 collocated_ref_idx;
+		u16 log2_parallel_merge_level;
+		u16 five_minus_max_num_merge_cand;
+		u16 sps_num_reorder_pics_0;
+		u16 modification_flag;
+		u16 tiles_flags;
+		u16 num_tile_columns_minus1;
+		u16 num_tile_rows_minus1;
+		u16 tile_width[8];
+		u16 tile_height[8];
+		u16 misc_flag0;
+		u16 pps_beta_offset_div2;
+		u16 pps_tc_offset_div2;
+		u16 slice_beta_offset_div2;
+		u16 slice_tc_offset_div2;
+		u16 pps_cb_qp_offset;
+		u16 pps_cr_qp_offset;
+		u16 first_slice_segment_in_pic_flag;
+		u16 m_temporalId;
+		u16 m_nalUnitType;
+		u16 vui_num_units_in_tick_hi;
+		u16 vui_num_units_in_tick_lo;
+		u16 vui_time_scale_hi;
+		u16 vui_time_scale_lo;
+		u16 bit_depth;
+		u16 profile_etc;
+		u16 sei_frame_field_info;
+		u16 video_signal_type;
+		u16 modification_list[0x20];
+		u16 conformance_window_flag;
+		u16 conf_win_left_offset;
+		u16 conf_win_right_offset;
+		u16 conf_win_top_offset;
+		u16 conf_win_bottom_offset;
+		u16 chroma_format_idc;
+		u16 color_description;
+		u16 aspect_ratio_idc;
+		u16 sar_width;
+		u16 sar_height;
+	} p;
+};
+
+enum nal_unit_type {
+	NAL_UNIT_CODED_SLICE_BLA	= 16,
+	NAL_UNIT_CODED_SLICE_BLANT	= 17,
+	NAL_UNIT_CODED_SLICE_BLA_N_LP	= 18,
+	NAL_UNIT_CODED_SLICE_IDR	= 19,
+	NAL_UNIT_CODED_SLICE_IDR_N_LP	= 20,
+};
+
+enum slice_type {
+	B_SLICE = 0,
+	P_SLICE = 1,
+	I_SLICE = 2,
+};
+
+/* A frame being decoded */
+struct hevc_frame {
+	struct list_head list;
+	struct vb2_v4l2_buffer *vbuf;
+	u32 offset;
+	u32 poc;
+
+	int referenced;
+	int show;
+	u32 num_reorder_pic;
+
+	u32 cur_slice_idx;
+	u32 cur_slice_type;
+
+	/* 2 lists (L0/L1) ; 800 slices ; 16 refs */
+	u32 ref_poc_list[2][MAX_SLICE_NUM][MAX_REF_ACTIVE];
+	u32 ref_num[2];
+};
+
+struct codec_hevc {
+	/* Protect the data structure */
+	struct mutex lock;
+
+	/* Common part of the HEVC decoder */
+	struct codec_hevc_common common;
+
+	/* Buffer for the HEVC Workspace */
+	void      *workspace_vaddr;
+	dma_addr_t workspace_paddr;
+
+	/* AUX buffer */
+	void      *aux_vaddr;
+	dma_addr_t aux_paddr;
+
+	/* Contains many information parsed from the bitstream */
+	union rpm_param rpm_param;
+
+	/* Information computed from the RPM */
+	u32 lcu_size; // Largest Coding Unit
+	u32 lcu_x_num;
+	u32 lcu_y_num;
+	u32 lcu_total;
+
+	/* Current Frame being handled */
+	struct hevc_frame *cur_frame;
+	u32 curr_poc;
+	/* Collocated Reference Picture */
+	struct hevc_frame *col_frame;
+	u32 col_poc;
+
+	/* All ref frames used by the HW at a given time */
+	struct list_head ref_frames_list;
+	u32 frames_num;
+
+	/* Coded resolution reported by the hardware */
+	u32 width, height;
+	/* Resolution minus the conformance window offsets */
+	u32 dst_width, dst_height;
+
+	u32 prev_tid0_poc;
+	u32 slice_segment_addr;
+	u32 slice_addr;
+	u32 ldc_flag;
+
+	/* Whether we detected the bitstream as 10-bit */
+	int is_10bit;
+};
+
+static u32 codec_hevc_num_pending_bufs(struct amvdec_session *sess)
+{
+	struct codec_hevc *hevc;
+	u32 ret;
+
+	hevc = sess->priv;
+	if (!hevc)
+		return 0;
+
+	mutex_lock(&hevc->lock);
+	ret = hevc->frames_num;
+	mutex_unlock(&hevc->lock);
+
+	return ret;
+}
+
+/* Update the L0 and L1 reference lists for a given frame */
+static void codec_hevc_update_frame_refs(struct amvdec_session *sess,
+					 struct hevc_frame *frame)
+{
+	struct codec_hevc *hevc = sess->priv;
+	union rpm_param *params = &hevc->rpm_param;
+	int num_ref_idx_l0_active =
+		(params->p.num_ref_idx_l0_active > MAX_REF_ACTIVE) ?
+		MAX_REF_ACTIVE : params->p.num_ref_idx_l0_active;
+	int num_ref_idx_l1_active =
+		(params->p.num_ref_idx_l1_active > MAX_REF_ACTIVE) ?
+		MAX_REF_ACTIVE : params->p.num_ref_idx_l1_active;
+	int ref_picset0[MAX_REF_ACTIVE] = { 0 };
+	int ref_picset1[MAX_REF_ACTIVE] = { 0 };
+	u16 *mod_list = params->p.modification_list;
+	int num_neg = 0;
+	int num_pos = 0;
+	int total_num;
+	int i;
+
+	for (i = 0; i < MAX_REF_ACTIVE; i++) {
+		frame->ref_poc_list[0][frame->cur_slice_idx][i] = 0;
+		frame->ref_poc_list[1][frame->cur_slice_idx][i] = 0;
+	}
+
+	for (i = 0; i < MAX_REF_ACTIVE; i++) {
+		u16 cur_rps = params->p.CUR_RPS[i];
+		int delt = cur_rps & ((1 << (RPS_USED_BIT - 1)) - 1);
+
+		if (cur_rps & 0x8000)
+			break;
+
+		if (!((cur_rps >> RPS_USED_BIT) & 1))
+			continue;
+
+		if ((cur_rps >> (RPS_USED_BIT - 1)) & 1) {
+			ref_picset0[num_neg] =
+			       frame->poc - ((1 << (RPS_USED_BIT - 1)) - delt);
+			num_neg++;
+		} else {
+			ref_picset1[num_pos] = frame->poc + delt;
+			num_pos++;
+		}
+	}
+
+	total_num = num_neg + num_pos;
+
+	if (total_num <= 0)
+		goto end;
+
+	for (i = 0; i < num_ref_idx_l0_active; i++) {
+		int cidx;
+
+		if (params->p.modification_flag & 0x1)
+			cidx = mod_list[i];
+		else
+			cidx = i % total_num;
+
+		frame->ref_poc_list[0][frame->cur_slice_idx][i] =
+			cidx >= num_neg ? ref_picset1[cidx - num_neg] :
+			ref_picset0[cidx];
+	}
+
+	if (params->p.slice_type != B_SLICE)
+		goto end;
+
+	if (params->p.modification_flag & 0x2) {
+		for (i = 0; i < num_ref_idx_l1_active; i++) {
+			int cidx;
+
+			if (params->p.modification_flag & 0x1)
+				cidx = mod_list[num_ref_idx_l0_active + i];
+			else
+				cidx = mod_list[i];
+
+			frame->ref_poc_list[1][frame->cur_slice_idx][i] =
+				(cidx >= num_pos) ? ref_picset0[cidx - num_pos]
+				: ref_picset1[cidx];
+		}
+	} else {
+		for (i = 0; i < num_ref_idx_l1_active; i++) {
+			int cidx = i % total_num;
+
+			frame->ref_poc_list[1][frame->cur_slice_idx][i] =
+				cidx >= num_pos ? ref_picset0[cidx - num_pos] :
+				ref_picset1[cidx];
+		}
+	}
+
+end:
+	frame->ref_num[0] = num_ref_idx_l0_active;
+	frame->ref_num[1] = num_ref_idx_l1_active;
+
+	dev_dbg(sess->core->dev,
+		"Frame %u; slice %u; slice_type %u; num_l0 %u; num_l1 %u\n",
+		frame->poc, frame->cur_slice_idx, params->p.slice_type,
+		frame->ref_num[0], frame->ref_num[1]);
+}
+
+static void codec_hevc_update_ldc_flag(struct codec_hevc *hevc)
+{
+	struct hevc_frame *frame = hevc->cur_frame;
+	u32 slice_type = frame->cur_slice_type;
+	u32 slice_idx = frame->cur_slice_idx;
+	int i;
+
+	hevc->ldc_flag = 0;
+
+	if (slice_type == I_SLICE)
+		return;
+
+	hevc->ldc_flag = 1;
+	for (i = 0; (i < frame->ref_num[0]) && hevc->ldc_flag; i++) {
+		if (frame->ref_poc_list[0][slice_idx][i] > frame->poc) {
+			hevc->ldc_flag = 0;
+			break;
+		}
+	}
+
+	if (slice_type == P_SLICE)
+		return;
+
+	for (i = 0; (i < frame->ref_num[1]) && hevc->ldc_flag; i++) {
+		if (frame->ref_poc_list[1][slice_idx][i] > frame->poc) {
+			hevc->ldc_flag = 0;
+			break;
+		}
+	}
+}
+
+/* Tag "old" frames that are no longer referenced */
+static void codec_hevc_update_referenced(struct codec_hevc *hevc)
+{
+	union rpm_param *param = &hevc->rpm_param;
+	struct hevc_frame *frame;
+	int i;
+	u32 curr_poc = hevc->curr_poc;
+
+	list_for_each_entry(frame, &hevc->ref_frames_list, list) {
+		int is_referenced = 0;
+		u32 poc_tmp;
+
+		if (!frame->referenced)
+			continue;
+
+		for (i = 0; i < MAX_REF_ACTIVE; i++) {
+			int delt;
+
+			if (param->p.CUR_RPS[i] & 0x8000)
+				break;
+
+			delt = param->p.CUR_RPS[i] &
+			       ((1 << (RPS_USED_BIT - 1)) - 1);
+			if (param->p.CUR_RPS[i] & (1 << (RPS_USED_BIT - 1))) {
+				poc_tmp = curr_poc -
+				      ((1 << (RPS_USED_BIT - 1)) - delt);
+			} else {
+				poc_tmp = curr_poc + delt;
+			}
+
+			if (poc_tmp == frame->poc) {
+				is_referenced = 1;
+				break;
+			}
+		}
+
+		frame->referenced = is_referenced;
+	}
+}
+
+static struct hevc_frame *
+codec_hevc_get_next_ready_frame(struct codec_hevc *hevc)
+{
+	struct hevc_frame *tmp, *ret = NULL;
+	u32 poc = INT_MAX;
+
+	list_for_each_entry(tmp, &hevc->ref_frames_list, list) {
+		if ((tmp->poc < poc) && tmp->show) {
+			ret = tmp;
+			poc = tmp->poc;
+		}
+	}
+
+	return ret;
+}
+
+/* Try to output as many frames as possible */
+static void codec_hevc_show_frames(struct amvdec_session *sess)
+{
+	struct hevc_frame *tmp, *n;
+	struct codec_hevc *hevc = sess->priv;
+
+	while ((tmp = codec_hevc_get_next_ready_frame(hevc))) {
+		if (hevc->curr_poc &&
+		    (hevc->frames_num <= tmp->num_reorder_pic))
+			break;
+
+		dev_dbg(sess->core->dev, "DONE frame poc %u; vbuf %u\n",
+			tmp->poc, tmp->vbuf->vb2_buf.index);
+		amvdec_dst_buf_done_offset(sess, tmp->vbuf, tmp->offset,
+					   V4L2_FIELD_NONE, false);
+
+		tmp->show = 0;
+		hevc->frames_num--;
+	}
+
+	/* clean output frame buffer */
+	list_for_each_entry_safe(tmp, n, &hevc->ref_frames_list, list) {
+		if (tmp->referenced || tmp->show)
+			continue;
+
+		list_del(&tmp->list);
+		kfree(tmp);
+	}
+}
+
+static int
+codec_hevc_setup_workspace(struct amvdec_session *sess,
+			   struct codec_hevc *hevc)
+{
+	struct amvdec_core *core = sess->core;
+	u32 revision = core->platform->revision;
+	dma_addr_t wkaddr;
+
+	/* Allocate some memory for the HEVC decoder's state */
+	hevc->workspace_vaddr = dma_alloc_coherent(core->dev, SIZE_WORKSPACE,
+						   &wkaddr, GFP_KERNEL);
+	if (!hevc->workspace_vaddr)
+		return -ENOMEM;
+
+	hevc->workspace_paddr = wkaddr;
+
+	amvdec_write_dos(core, HEVCD_IPP_LINEBUFF_BASE, wkaddr + IPP_OFFSET);
+	amvdec_write_dos(core, HEVC_RPM_BUFFER, wkaddr + RPM_OFFSET);
+	amvdec_write_dos(core, HEVC_SHORT_TERM_RPS, wkaddr + SH_TM_RPS_OFFSET);
+	amvdec_write_dos(core, HEVC_VPS_BUFFER, wkaddr + VPS_OFFSET);
+	amvdec_write_dos(core, HEVC_SPS_BUFFER, wkaddr + SPS_OFFSET);
+	amvdec_write_dos(core, HEVC_PPS_BUFFER, wkaddr + PPS_OFFSET);
+	amvdec_write_dos(core, HEVC_SAO_UP, wkaddr + SAO_UP_OFFSET);
+
+	if (codec_hevc_use_mmu(revision, sess->pixfmt_cap, hevc->is_10bit)) {
+		amvdec_write_dos(core, HEVC_SAO_MMU_VH0_ADDR,
+				 wkaddr + MMU_VBH_OFFSET);
+		amvdec_write_dos(core, HEVC_SAO_MMU_VH1_ADDR,
+				 wkaddr + MMU_VBH_OFFSET + (MMU_VBH_SIZE / 2));
+
+		if (revision >= VDEC_REVISION_G12A)
+			amvdec_write_dos(core, HEVC_ASSIST_MMU_MAP_ADDR,
+					 hevc->common.mmu_map_paddr);
+		else
+			amvdec_write_dos(core, H265_MMU_MAP_BUFFER,
+					 hevc->common.mmu_map_paddr);
+	} else if (revision < VDEC_REVISION_G12A) {
+		amvdec_write_dos(core, HEVC_STREAM_SWAP_BUFFER,
+				 wkaddr + SWAP_BUF_OFFSET);
+		amvdec_write_dos(core, HEVC_STREAM_SWAP_BUFFER2,
+				 wkaddr + SWAP_BUF2_OFFSET);
+	}
+
+	amvdec_write_dos(core, HEVC_SCALELUT, wkaddr + SCALELUT_OFFSET);
+	amvdec_write_dos(core, HEVC_DBLK_CFG4, wkaddr + DBLK_PARA_OFFSET);
+	amvdec_write_dos(core, HEVC_DBLK_CFG5, wkaddr + DBLK_DATA_OFFSET);
+	if (revision >= VDEC_REVISION_G12A)
+		amvdec_write_dos(core, HEVC_DBLK_CFGE,
+				 wkaddr + DBLK_DATA2_OFFSET);
+
+	amvdec_write_dos(core, LMEM_DUMP_ADR, wkaddr + LMEM_OFFSET);
+
+	return 0;
+}
+
+static int codec_hevc_start(struct amvdec_session *sess)
+{
+	struct amvdec_core *core = sess->core;
+	struct codec_hevc *hevc;
+	u32 val;
+	int i;
+	int ret;
+
+	hevc = kzalloc(sizeof(*hevc), GFP_KERNEL);
+	if (!hevc)
+		return -ENOMEM;
+
+	INIT_LIST_HEAD(&hevc->ref_frames_list);
+	hevc->curr_poc = INVALID_POC;
+
+	ret = codec_hevc_setup_workspace(sess, hevc);
+	if (ret)
+		goto free_hevc;
+
+	val = BIT(0); /* stream_fetch_enable */
+	if (core->platform->revision >= VDEC_REVISION_G12A)
+		val |= (0xf << 25); /* arwlen_axi_max */
+	amvdec_write_dos_bits(core, HEVC_STREAM_CONTROL, val);
+
+	val = amvdec_read_dos(core, HEVC_PARSER_INT_CONTROL) & 0x03ffffff;
+	val |= (3 << 29) | BIT(27) | BIT(24) | BIT(22) | BIT(7) | BIT(4) |
+	       BIT(0);
+	amvdec_write_dos(core, HEVC_PARSER_INT_CONTROL, val);
+	amvdec_write_dos_bits(core, HEVC_SHIFT_STATUS, BIT(1) | BIT(0));
+	amvdec_write_dos(core, HEVC_SHIFT_CONTROL,
+			 (3 << 6) | BIT(5) | BIT(2) | BIT(0));
+	amvdec_write_dos(core, HEVC_CABAC_CONTROL, 1);
+	amvdec_write_dos(core, HEVC_PARSER_CORE_CONTROL, 1);
+	amvdec_write_dos(core, HEVC_DEC_STATUS_REG, 0);
+
+	amvdec_write_dos(core, HEVC_IQIT_SCALELUT_WR_ADDR, 0);
+	for (i = 0; i < 1024; ++i)
+		amvdec_write_dos(core, HEVC_IQIT_SCALELUT_DATA, 0);
+
+	amvdec_write_dos(core, HEVC_DECODE_SIZE, 0);
+
+	amvdec_write_dos(core, HEVC_PARSER_CMD_WRITE, BIT(16));
+	for (i = 0; i < ARRAY_SIZE(vdec_hevc_parser_cmd); ++i)
+		amvdec_write_dos(core, HEVC_PARSER_CMD_WRITE,
+				 vdec_hevc_parser_cmd[i]);
+
+	amvdec_write_dos(core, HEVC_PARSER_CMD_SKIP_0, PARSER_CMD_SKIP_CFG_0);
+	amvdec_write_dos(core, HEVC_PARSER_CMD_SKIP_1, PARSER_CMD_SKIP_CFG_1);
+	amvdec_write_dos(core, HEVC_PARSER_CMD_SKIP_2, PARSER_CMD_SKIP_CFG_2);
+	amvdec_write_dos(core, HEVC_PARSER_IF_CONTROL,
+			 BIT(5) | BIT(2) | BIT(0));
+
+	amvdec_write_dos(core, HEVCD_IPP_TOP_CNTL, BIT(0));
+	amvdec_write_dos(core, HEVCD_IPP_TOP_CNTL, BIT(1));
+
+	amvdec_write_dos(core, HEVC_WAIT_FLAG, 1);
+
+	/* clear mailbox interrupt */
+	amvdec_write_dos(core, HEVC_ASSIST_MBOX1_CLR_REG, 1);
+	/* enable mailbox interrupt */
+	amvdec_write_dos(core, HEVC_ASSIST_MBOX1_MASK, 1);
+	/* disable PSCALE for hardware sharing */
+	amvdec_write_dos(core, HEVC_PSCALE_CTRL, 0);
+	/* Let the uCode do all the parsing */
+	amvdec_write_dos(core, NAL_SEARCH_CTL, 0xc);
+
+	amvdec_write_dos(core, DECODE_STOP_POS, 0);
+	amvdec_write_dos(core, HEVC_DECODE_MODE, DECODE_MODE_SINGLE);
+	amvdec_write_dos(core, HEVC_DECODE_MODE2, 0);
+
+	/* AUX buffers */
+	hevc->aux_vaddr = dma_alloc_coherent(core->dev, SIZE_AUX,
+					     &hevc->aux_paddr, GFP_KERNEL);
+	if (!hevc->aux_vaddr) {
+		ret = -ENOMEM;
+		goto free_hevc;
+	}
+
+	amvdec_write_dos(core, HEVC_AUX_ADR, hevc->aux_paddr);
+	amvdec_write_dos(core, HEVC_AUX_DATA_SIZE,
+			 (((SIZE_AUX) >> 4) << 16) | 0);
+	mutex_init(&hevc->lock);
+	sess->priv = hevc;
+
+	return 0;
+
+free_hevc:
+	kfree(hevc);
+	return ret;
+}
+
+static void codec_hevc_flush_output(struct amvdec_session *sess)
+{
+	struct codec_hevc *hevc = sess->priv;
+	struct hevc_frame *tmp, *n;
+
+	while ((tmp = codec_hevc_get_next_ready_frame(hevc))) {
+		amvdec_dst_buf_done(sess, tmp->vbuf, V4L2_FIELD_NONE);
+		tmp->show = 0;
+		hevc->frames_num--;
+	}
+
+	list_for_each_entry_safe(tmp, n, &hevc->ref_frames_list, list) {
+		list_del(&tmp->list);
+		kfree(tmp);
+	}
+}
+
+static int codec_hevc_stop(struct amvdec_session *sess)
+{
+	struct codec_hevc *hevc = sess->priv;
+	struct amvdec_core *core = sess->core;
+
+	mutex_lock(&hevc->lock);
+	codec_hevc_flush_output(sess);
+
+	if (hevc->workspace_vaddr)
+		dma_free_coherent(core->dev, SIZE_WORKSPACE,
+				  hevc->workspace_vaddr,
+				  hevc->workspace_paddr);
+
+	if (hevc->aux_vaddr)
+		dma_free_coherent(core->dev, SIZE_AUX,
+				  hevc->aux_vaddr, hevc->aux_paddr);
+
+	codec_hevc_free_fbc_buffers(sess, &hevc->common);
+	mutex_unlock(&hevc->lock);
+	mutex_destroy(&hevc->lock);
+
+	return 0;
+}
+
+static struct hevc_frame *
+codec_hevc_get_frame_by_poc(struct codec_hevc *hevc, u32 poc)
+{
+	struct hevc_frame *tmp;
+
+	list_for_each_entry(tmp, &hevc->ref_frames_list, list) {
+		if (tmp->poc == poc)
+			return tmp;
+	}
+
+	return NULL;
+}
+
+static struct hevc_frame *
+codec_hevc_prepare_new_frame(struct amvdec_session *sess)
+{
+	struct amvdec_core *core = sess->core;
+	struct hevc_frame *new_frame = NULL;
+	struct codec_hevc *hevc = sess->priv;
+	struct vb2_v4l2_buffer *vbuf;
+	union rpm_param *params = &hevc->rpm_param;
+
+	new_frame = kzalloc(sizeof(*new_frame), GFP_KERNEL);
+	if (!new_frame)
+		return NULL;
+
+	vbuf = v4l2_m2m_dst_buf_remove(sess->m2m_ctx);
+	if (!vbuf) {
+		dev_err(sess->core->dev, "No dst buffer available\n");
+		kfree(new_frame);
+		return NULL;
+	}
+
+	new_frame->vbuf = vbuf;
+	new_frame->referenced = 1;
+	new_frame->show = 1;
+	new_frame->poc = hevc->curr_poc;
+	new_frame->cur_slice_type = params->p.slice_type;
+	new_frame->num_reorder_pic = params->p.sps_num_reorder_pics_0;
+	new_frame->offset = amvdec_read_dos(core, HEVC_SHIFT_BYTE_COUNT);
+
+	list_add_tail(&new_frame->list, &hevc->ref_frames_list);
+	hevc->frames_num++;
+
+	return new_frame;
+}
+
+static void
+codec_hevc_set_sao(struct amvdec_session *sess, struct hevc_frame *frame)
+{
+	struct amvdec_core *core = sess->core;
+	struct codec_hevc *hevc = sess->priv;
+	struct vb2_buffer *vb = &frame->vbuf->vb2_buf;
+	union rpm_param *param = &hevc->rpm_param;
+	u32 pic_height_cu =
+		(hevc->height + hevc->lcu_size - 1) / hevc->lcu_size;
+	u32 sao_mem_unit = (hevc->lcu_size == 16 ? 9 :
+			   hevc->lcu_size == 32 ? 14 : 24) << 4;
+	u32 sao_vb_size = (sao_mem_unit + (2 << 4)) * pic_height_cu;
+	u32 misc_flag0 = param->p.misc_flag0;
+	dma_addr_t buf_y_paddr;
+	dma_addr_t buf_u_v_paddr;
+	u32 slice_deblocking_filter_disabled_flag;
+	u32 val, val_2;
+
+	val = (amvdec_read_dos(core, HEVC_SAO_CTRL0) & ~0xf) |
+	      ilog2(hevc->lcu_size);
+	amvdec_write_dos(core, HEVC_SAO_CTRL0, val);
+
+	amvdec_write_dos(core, HEVC_SAO_PIC_SIZE,
+			 hevc->width | (hevc->height << 16));
+	amvdec_write_dos(core, HEVC_SAO_PIC_SIZE_LCU,
+			 (hevc->lcu_x_num - 1) | (hevc->lcu_y_num - 1) << 16);
+
+	if (codec_hevc_use_downsample(sess->pixfmt_cap, hevc->is_10bit) ||
+	    codec_hevc_use_mmu(core->platform->revision, sess->pixfmt_cap,
+			       hevc->is_10bit))
+		buf_y_paddr =
+		     hevc->common.fbc_buffer_paddr[vb->index];
+	else
+		buf_y_paddr =
+		       vb2_dma_contig_plane_dma_addr(vb, 0);
+
+	if (codec_hevc_use_fbc(sess->pixfmt_cap, hevc->is_10bit)) {
+		val = amvdec_read_dos(core, HEVC_SAO_CTRL5) & ~0xff0000;
+		amvdec_write_dos(core, HEVC_SAO_CTRL5, val);
+		amvdec_write_dos(core, HEVC_CM_BODY_START_ADDR, buf_y_paddr);
+	}
+
+	if (sess->pixfmt_cap == V4L2_PIX_FMT_NV12M) {
+		buf_y_paddr =
+		       vb2_dma_contig_plane_dma_addr(vb, 0);
+		buf_u_v_paddr =
+		       vb2_dma_contig_plane_dma_addr(vb, 1);
+		amvdec_write_dos(core, HEVC_SAO_Y_START_ADDR, buf_y_paddr);
+		amvdec_write_dos(core, HEVC_SAO_C_START_ADDR, buf_u_v_paddr);
+		amvdec_write_dos(core, HEVC_SAO_Y_WPTR, buf_y_paddr);
+		amvdec_write_dos(core, HEVC_SAO_C_WPTR, buf_u_v_paddr);
+	}
+
+	if (codec_hevc_use_mmu(core->platform->revision, sess->pixfmt_cap,
+			       hevc->is_10bit)) {
+		dma_addr_t header_adr = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+		if (codec_hevc_use_downsample(sess->pixfmt_cap, hevc->is_10bit))
+			header_adr = hevc->common.mmu_header_paddr[vb->index];
+		amvdec_write_dos(core, HEVC_CM_HEADER_START_ADDR, header_adr);
+		/* use HEVC_CM_HEADER_START_ADDR */
+		amvdec_write_dos_bits(core, HEVC_SAO_CTRL5, BIT(10));
+		amvdec_write_dos_bits(core, HEVC_SAO_CTRL9, BIT(0));
+	}
+
+	amvdec_write_dos(core, HEVC_SAO_Y_LENGTH,
+			 amvdec_get_output_size(sess));
+	amvdec_write_dos(core, HEVC_SAO_C_LENGTH,
+			 (amvdec_get_output_size(sess) / 2));
+
+	if (frame->cur_slice_idx == 0) {
+		if (core->platform->revision >= VDEC_REVISION_G12A) {
+			if (core->platform->revision >= VDEC_REVISION_SM1)
+				val = 0xfc << 8;
+			else
+				val = 0x54 << 8;
+
+			/* enable first, compressed write */
+			if (codec_hevc_use_fbc(sess->pixfmt_cap,
+					       hevc->is_10bit))
+				val |= BIT(8);
+
+			/* enable second, uncompressed write */
+			if (sess->pixfmt_cap == V4L2_PIX_FMT_NV12M)
+				val |= BIT(9);
+
+			/* dblk pipeline mode=1 for performance */
+			if (hevc->width >= 1280)
+				val |= BIT(4);
+
+			amvdec_write_dos(core, HEVC_DBLK_CFGB, val);
+			amvdec_write_dos(core, HEVC_DBLK_STS1 + 16, BIT(28));
+		}
+
+		amvdec_write_dos(core, HEVC_DBLK_CFG2,
+				 hevc->width | (hevc->height << 16));
+
+		val = 0;
+		if ((misc_flag0 >> PCM_ENABLE_FLAG_BIT) & 0x1)
+			val |= ((misc_flag0 >>
+				 PCM_LOOP_FILTER_DISABLED_FLAG_BIT) & 0x1) << 3;
+
+		val |= (param->p.pps_cb_qp_offset & 0x1f) << 4;
+		val |= (param->p.pps_cr_qp_offset & 0x1f) << 9;
+		val |= (hevc->lcu_size == 64) ? 0 :
+		       ((hevc->lcu_size == 32) ? 1 : 2);
+		amvdec_write_dos(core, HEVC_DBLK_CFG1, val);
+	}
+
+	val = amvdec_read_dos(core, HEVC_SAO_CTRL1) & ~0x3ff3;
+	val |= 0xff0; /* Set endianness for 2-bytes swaps (nv12) */
+	if (core->platform->revision < VDEC_REVISION_G12A) {
+		if (!codec_hevc_use_fbc(sess->pixfmt_cap, hevc->is_10bit))
+			val |= BIT(0); /* disable cm compression */
+		/* TOFIX: Handle Amlogic Framebuffer compression */
+	}
+
+	amvdec_write_dos(core, HEVC_SAO_CTRL1, val);
+
+	if (!codec_hevc_use_fbc(sess->pixfmt_cap, hevc->is_10bit)) {
+		/* no downscale for NV12 */
+		val = amvdec_read_dos(core, HEVC_SAO_CTRL5) & ~0xff0000;
+		amvdec_write_dos(core, HEVC_SAO_CTRL5, val);
+	}
+
+	val = amvdec_read_dos(core, HEVCD_IPP_AXIIF_CONFIG) & ~0x30;
+	val |= 0xf;
+	amvdec_write_dos(core, HEVCD_IPP_AXIIF_CONFIG, val);
+
+	val = 0;
+	val_2 = amvdec_read_dos(core, HEVC_SAO_CTRL0);
+	val_2 &= (~0x300);
+
+	slice_deblocking_filter_disabled_flag = (misc_flag0 >>
+			SLICE_DEBLOCKING_FILTER_DISABLED_FLAG_BIT) & 0x1;
+	if ((misc_flag0 & (1 << DEBLOCKING_FILTER_OVERRIDE_ENABLED_FLAG_BIT)) &&
+	    (misc_flag0 & (1 << DEBLOCKING_FILTER_OVERRIDE_FLAG_BIT))) {
+		val |= slice_deblocking_filter_disabled_flag << 2;
+
+		if (!slice_deblocking_filter_disabled_flag) {
+			val |= (param->p.slice_beta_offset_div2 & 0xf) << 3;
+			val |= (param->p.slice_tc_offset_div2 & 0xf) << 7;
+		}
+	} else {
+		val |=
+			((misc_flag0 >>
+			  PPS_DEBLOCKING_FILTER_DISABLED_FLAG_BIT) & 0x1) << 2;
+
+		if (((misc_flag0 >> PPS_DEBLOCKING_FILTER_DISABLED_FLAG_BIT) &
+			0x1) == 0) {
+			val |= (param->p.pps_beta_offset_div2 & 0xf) << 3;
+			val |= (param->p.pps_tc_offset_div2 & 0xf) << 7;
+		}
+	}
+	if ((misc_flag0 & (1 << PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED_FLAG_BIT)) &&
+	    ((misc_flag0 & (1 << SLICE_SAO_LUMA_FLAG_BIT)) ||
+	   (misc_flag0 & (1 << SLICE_SAO_CHROMA_FLAG_BIT)) ||
+	   (!slice_deblocking_filter_disabled_flag))) {
+		val |=
+			((misc_flag0 >>
+			  SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED_FLAG_BIT)
+			 & 0x1)	<< 1;
+		val_2 |=
+			((misc_flag0 >>
+			  SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED_FLAG_BIT)
+			& 0x1) << 9;
+	} else {
+		val |=
+			((misc_flag0 >>
+			  PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED_FLAG_BIT)
+			 & 0x1) << 1;
+		val_2 |=
+			((misc_flag0 >>
+			  PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED_FLAG_BIT)
+			 & 0x1) << 9;
+	}
+
+	amvdec_write_dos(core, HEVC_DBLK_CFG9, val);
+	amvdec_write_dos(core, HEVC_SAO_CTRL0, val_2);
+
+	amvdec_write_dos(core, HEVC_sao_mem_unit, sao_mem_unit);
+	amvdec_write_dos(core, HEVC_SAO_ABV,
+			 hevc->workspace_paddr + SAO_ABV_OFFSET);
+	amvdec_write_dos(core, HEVC_sao_vb_size, sao_vb_size);
+	amvdec_write_dos(core, HEVC_SAO_VB,
+			 hevc->workspace_paddr + SAO_VB_OFFSET);
+}
+
+static dma_addr_t codec_hevc_get_frame_mv_paddr(struct codec_hevc *hevc,
+						struct hevc_frame *frame)
+{
+	return hevc->workspace_paddr + MPRED_MV_OFFSET +
+		(frame->vbuf->vb2_buf.index * MPRED_MV_BUF_SIZE);
+}
+
+static void
+codec_hevc_set_mpred_ctrl(struct amvdec_core *core, struct codec_hevc *hevc)
+{
+	union rpm_param *param = &hevc->rpm_param;
+	u32 slice_type = param->p.slice_type;
+	u32 lcu_size_log2 = ilog2(hevc->lcu_size);
+	u32 val;
+
+	val = slice_type |
+	      MPRED_CTRL0_ABOVE_EN |
+	      MPRED_CTRL0_MV_WR_EN |
+	      MPRED_CTRL0_BUF_LINEAR |
+	      (lcu_size_log2 << 16) |
+	      (3 << 20) | /* cu_size_log2 */
+	      (param->p.log2_parallel_merge_level << 24);
+
+	if (slice_type != I_SLICE)
+		val |= MPRED_CTRL0_MV_RD_EN;
+
+	if (param->p.collocated_from_l0_flag)
+		val |= MPRED_CTRL0_COL_FROM_L0;
+
+	if (param->p.slice_temporal_mvp_enable_flag)
+		val |= MPRED_CTRL0_TMVP;
+
+	if (hevc->ldc_flag)
+		val |= MPRED_CTRL0_LDC;
+
+	if (param->p.dependent_slice_segment_flag)
+		val |= MPRED_CTRL0_NEW_SLI_SEG;
+
+	if (param->p.slice_segment_address == 0)
+		val |= MPRED_CTRL0_NEW_PIC |
+		       MPRED_CTRL0_NEW_TILE;
+
+	amvdec_write_dos(core, HEVC_MPRED_CTRL0, val);
+
+	val = (5 - param->p.five_minus_max_num_merge_cand) |
+	      (AMVP_MAX_NUM_CANDS << 4) |
+	      (AMVP_MAX_NUM_CANDS_MEM << 8) |
+	      (NUM_CHROMA_MODE << 12) |
+	      (DM_CHROMA_IDX << 16);
+	amvdec_write_dos(core, HEVC_MPRED_CTRL1, val);
+}
+
+static void codec_hevc_set_mpred_mv(struct amvdec_core *core,
+				    struct codec_hevc *hevc,
+				    struct hevc_frame *frame,
+				    struct hevc_frame *col_frame)
+{
+	union rpm_param *param = &hevc->rpm_param;
+	u32 lcu_size_log2 = ilog2(hevc->lcu_size);
+	u32 mv_mem_unit = lcu_size_log2 == 6 ? 0x200 :
+			  lcu_size_log2 == 5 ? 0x80 : 0x20;
+	dma_addr_t col_mv_rd_start_addr, col_mv_rd_ptr, col_mv_rd_end_addr;
+	dma_addr_t mpred_mv_wr_ptr;
+
+	amvdec_read_dos(core, HEVC_MPRED_CURR_LCU);
+
+	col_mv_rd_start_addr = codec_hevc_get_frame_mv_paddr(hevc, col_frame);
+	mpred_mv_wr_ptr = codec_hevc_get_frame_mv_paddr(hevc, frame) +
+			  (hevc->slice_addr * mv_mem_unit);
+	col_mv_rd_ptr = col_mv_rd_start_addr +
+			(hevc->slice_addr * mv_mem_unit);
+	col_mv_rd_end_addr = col_mv_rd_start_addr +
+			     (hevc->lcu_total * mv_mem_unit);
+
+	amvdec_write_dos(core, HEVC_MPRED_MV_WR_START_ADDR,
+			 codec_hevc_get_frame_mv_paddr(hevc, frame));
+	amvdec_write_dos(core, HEVC_MPRED_MV_RD_START_ADDR,
+			 col_mv_rd_start_addr);
+
+	if (param->p.slice_segment_address == 0) {
+		amvdec_write_dos(core, HEVC_MPRED_ABV_START_ADDR,
+				 hevc->workspace_paddr + MPRED_ABV_OFFSET);
+		amvdec_write_dos(core, HEVC_MPRED_MV_WPTR, mpred_mv_wr_ptr);
+		amvdec_write_dos(core, HEVC_MPRED_MV_RPTR,
+				 col_mv_rd_start_addr);
+	} else {
+		amvdec_write_dos(core, HEVC_MPRED_MV_RPTR, col_mv_rd_ptr);
+	}
+
+	amvdec_write_dos(core, HEVC_MPRED_MV_RD_END_ADDR, col_mv_rd_end_addr);
+}
+
+/* Update motion prediction with the current slice */
+static void codec_hevc_set_mpred(struct amvdec_session *sess,
+				 struct hevc_frame *frame,
+				 struct hevc_frame *col_frame)
+{
+	struct amvdec_core *core = sess->core;
+	struct codec_hevc *hevc = sess->priv;
+	u32 *ref_num = frame->ref_num;
+	u32 *ref_poc_l0 = frame->ref_poc_list[0][frame->cur_slice_idx];
+	u32 *ref_poc_l1 = frame->ref_poc_list[1][frame->cur_slice_idx];
+	u32 val;
+	int i;
+
+	codec_hevc_set_mpred_ctrl(core, hevc);
+	codec_hevc_set_mpred_mv(core, hevc, frame, col_frame);
+
+	amvdec_write_dos(core, HEVC_MPRED_PIC_SIZE,
+			 hevc->width | (hevc->height << 16));
+
+	val = ((hevc->lcu_x_num - 1) | (hevc->lcu_y_num - 1) << 16);
+	amvdec_write_dos(core, HEVC_MPRED_PIC_SIZE_LCU, val);
+
+	amvdec_write_dos(core, HEVC_MPRED_REF_NUM,
+			 (ref_num[1] << 8) | ref_num[0]);
+	amvdec_write_dos(core, HEVC_MPRED_REF_EN_L0, (1 << ref_num[0]) - 1);
+	amvdec_write_dos(core, HEVC_MPRED_REF_EN_L1, (1 << ref_num[1]) - 1);
+
+	amvdec_write_dos(core, HEVC_MPRED_CUR_POC, hevc->curr_poc);
+	amvdec_write_dos(core, HEVC_MPRED_COL_POC, hevc->col_poc);
+
+	for (i = 0; i < MAX_REF_ACTIVE; ++i) {
+		amvdec_write_dos(core, HEVC_MPRED_L0_REF00_POC + i * 4,
+				 ref_poc_l0[i]);
+		amvdec_write_dos(core, HEVC_MPRED_L1_REF00_POC + i * 4,
+				 ref_poc_l1[i]);
+	}
+}
+
+/*  motion compensation reference cache controller */
+static void codec_hevc_set_mcrcc(struct amvdec_session *sess)
+{
+	struct amvdec_core *core = sess->core;
+	struct codec_hevc *hevc = sess->priv;
+	u32 val, val_2;
+	int l0_cnt = 0;
+	int l1_cnt = 0x7fff;
+
+	if (!codec_hevc_use_fbc(sess->pixfmt_cap, hevc->is_10bit)) {
+		l0_cnt = hevc->cur_frame->ref_num[0];
+		l1_cnt = hevc->cur_frame->ref_num[1];
+	}
+
+	if (hevc->cur_frame->cur_slice_type == I_SLICE) {
+		amvdec_write_dos(core, HEVCD_MCRCC_CTL1, 0);
+		return;
+	}
+
+	if (hevc->cur_frame->cur_slice_type == P_SLICE) {
+		amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR,
+				 BIT(1));
+		val = amvdec_read_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR);
+		val &= 0xffff;
+		val |= (val << 16);
+		amvdec_write_dos(core, HEVCD_MCRCC_CTL2, val);
+
+		if (l0_cnt == 1) {
+			amvdec_write_dos(core, HEVCD_MCRCC_CTL3, val);
+		} else {
+			val = amvdec_read_dos(core,
+					      HEVCD_MPP_ANC_CANVAS_DATA_ADDR);
+			val &= 0xffff;
+			val |= (val << 16);
+			amvdec_write_dos(core, HEVCD_MCRCC_CTL3, val);
+		}
+	} else { /* B_SLICE */
+		amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR, 0);
+		val = amvdec_read_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR);
+		val &= 0xffff;
+		val |= (val << 16);
+		amvdec_write_dos(core, HEVCD_MCRCC_CTL2, val);
+
+		amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR,
+				 BIT(12) | BIT(1));
+		val_2 = amvdec_read_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR);
+		val_2 &= 0xffff;
+		val_2 |= (val_2 << 16);
+		if (val == val_2 && l1_cnt > 1) {
+			val_2 = amvdec_read_dos(core,
+						HEVCD_MPP_ANC_CANVAS_DATA_ADDR);
+			val_2 &= 0xffff;
+			val_2 |= (val_2 << 16);
+		}
+		amvdec_write_dos(core, HEVCD_MCRCC_CTL3, val);
+	}
+
+	/* enable mcrcc progressive-mode */
+	amvdec_write_dos(core, HEVCD_MCRCC_CTL1, 0xff0);
+}
+
+static void codec_hevc_set_ref_list(struct amvdec_session *sess,
+				    u32 ref_num, u32 *ref_poc_list)
+{
+	struct codec_hevc *hevc = sess->priv;
+	struct hevc_frame *ref_frame;
+	struct amvdec_core *core = sess->core;
+	int i;
+	u32 buf_id_y;
+	u32 buf_id_uv;
+
+	for (i = 0; i < ref_num; i++) {
+		ref_frame = codec_hevc_get_frame_by_poc(hevc, ref_poc_list[i]);
+
+		if (!ref_frame) {
+			dev_warn(core->dev, "Couldn't find ref. frame %u\n",
+				 ref_poc_list[i]);
+			continue;
+		}
+
+		if (codec_hevc_use_fbc(sess->pixfmt_cap, hevc->is_10bit)) {
+			buf_id_y = ref_frame->vbuf->vb2_buf.index;
+			buf_id_uv = buf_id_y;
+		} else {
+			buf_id_y = ref_frame->vbuf->vb2_buf.index * 2;
+			buf_id_uv = buf_id_y + 1;
+		}
+
+		amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_DATA_ADDR,
+				 (buf_id_uv << 16) |
+				 (buf_id_uv << 8) |
+				 buf_id_y);
+	}
+}
+
+static void codec_hevc_set_mc(struct amvdec_session *sess,
+			      struct hevc_frame *frame)
+{
+	struct amvdec_core *core = sess->core;
+
+	if (frame->cur_slice_type == I_SLICE)
+		return;
+
+	amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR, 1);
+	codec_hevc_set_ref_list(sess, frame->ref_num[0],
+				frame->ref_poc_list[0][frame->cur_slice_idx]);
+
+	if (frame->cur_slice_type == P_SLICE)
+		return;
+
+	amvdec_write_dos(core, HEVCD_MPP_ANC_CANVAS_ACCCONFIG_ADDR,
+			 BIT(12) | BIT(0));
+	codec_hevc_set_ref_list(sess, frame->ref_num[1],
+				frame->ref_poc_list[1][frame->cur_slice_idx]);
+}
+
+static void codec_hevc_update_col_frame(struct codec_hevc *hevc)
+{
+	struct hevc_frame *cur_frame = hevc->cur_frame;
+	union rpm_param *param = &hevc->rpm_param;
+	u32 list_no = 0;
+	u32 col_ref = param->p.collocated_ref_idx;
+	u32 col_from_l0 = param->p.collocated_from_l0_flag;
+	u32 cur_slice_idx = cur_frame->cur_slice_idx;
+
+	if (cur_frame->cur_slice_type == B_SLICE)
+		list_no = 1 - col_from_l0;
+
+	if (col_ref >= cur_frame->ref_num[list_no])
+		hevc->col_poc = INVALID_POC;
+	else
+		hevc->col_poc = cur_frame->ref_poc_list[list_no]
+						       [cur_slice_idx]
+						       [col_ref];
+
+	if (cur_frame->cur_slice_type == I_SLICE)
+		goto end;
+
+	if (hevc->col_poc != INVALID_POC)
+		hevc->col_frame = codec_hevc_get_frame_by_poc(hevc,
+							      hevc->col_poc);
+	else
+		hevc->col_frame = hevc->cur_frame;
+
+end:
+	if (!hevc->col_frame)
+		hevc->col_frame = hevc->cur_frame;
+}
+
+static void codec_hevc_update_pocs(struct amvdec_session *sess)
+{
+	struct codec_hevc *hevc = sess->priv;
+	union rpm_param *param = &hevc->rpm_param;
+	u32 nal_unit_type = param->p.m_nalUnitType;
+	u32 temporal_id = param->p.m_temporalId & 0x7;
+	int max_poc_lsb =
+		1 << (param->p.log2_max_pic_order_cnt_lsb_minus4 + 4);
+	int prev_poc_lsb;
+	int prev_poc_msb;
+	int poc_msb;
+	int poc_lsb = param->p.POClsb;
+
+	if (nal_unit_type == NAL_UNIT_CODED_SLICE_IDR ||
+	    nal_unit_type == NAL_UNIT_CODED_SLICE_IDR_N_LP) {
+		hevc->curr_poc = 0;
+		if ((temporal_id - 1) == 0)
+			hevc->prev_tid0_poc = hevc->curr_poc;
+
+		return;
+	}
+
+	prev_poc_lsb = hevc->prev_tid0_poc % max_poc_lsb;
+	prev_poc_msb = hevc->prev_tid0_poc - prev_poc_lsb;
+
+	if ((poc_lsb < prev_poc_lsb) &&
+	    ((prev_poc_lsb - poc_lsb) >= (max_poc_lsb / 2)))
+		poc_msb = prev_poc_msb + max_poc_lsb;
+	else if ((poc_lsb > prev_poc_lsb) &&
+		 ((poc_lsb - prev_poc_lsb) > (max_poc_lsb / 2)))
+		poc_msb = prev_poc_msb - max_poc_lsb;
+	else
+		poc_msb = prev_poc_msb;
+
+	if (nal_unit_type == NAL_UNIT_CODED_SLICE_BLA   ||
+	    nal_unit_type == NAL_UNIT_CODED_SLICE_BLANT ||
+	    nal_unit_type == NAL_UNIT_CODED_SLICE_BLA_N_LP)
+		poc_msb = 0;
+
+	hevc->curr_poc = (poc_msb + poc_lsb);
+	if ((temporal_id - 1) == 0)
+		hevc->prev_tid0_poc = hevc->curr_poc;
+}
+
+static void codec_hevc_process_segment_header(struct amvdec_session *sess)
+{
+	struct codec_hevc *hevc = sess->priv;
+	union rpm_param *param = &hevc->rpm_param;
+
+	if (param->p.first_slice_segment_in_pic_flag == 0) {
+		hevc->slice_segment_addr = param->p.slice_segment_address;
+		if (!param->p.dependent_slice_segment_flag)
+			hevc->slice_addr = hevc->slice_segment_addr;
+	} else {
+		hevc->slice_segment_addr = 0;
+		hevc->slice_addr = 0;
+	}
+
+	codec_hevc_update_pocs(sess);
+}
+
+static int codec_hevc_process_segment(struct amvdec_session *sess)
+{
+	struct codec_hevc *hevc = sess->priv;
+	struct amvdec_core *core = sess->core;
+	union rpm_param *param = &hevc->rpm_param;
+	u32 slice_segment_address = param->p.slice_segment_address;
+
+	/* First slice: new frame */
+	if (slice_segment_address == 0) {
+		codec_hevc_update_referenced(hevc);
+		codec_hevc_show_frames(sess);
+
+		hevc->cur_frame = codec_hevc_prepare_new_frame(sess);
+		if (!hevc->cur_frame)
+			return -1;
+	} else {
+		hevc->cur_frame->cur_slice_idx++;
+	}
+
+	codec_hevc_update_frame_refs(sess, hevc->cur_frame);
+	codec_hevc_update_col_frame(hevc);
+	codec_hevc_update_ldc_flag(hevc);
+	if (codec_hevc_use_mmu(core->platform->revision, sess->pixfmt_cap,
+			       hevc->is_10bit))
+		codec_hevc_fill_mmu_map(sess, &hevc->common,
+					&hevc->cur_frame->vbuf->vb2_buf,
+					hevc->is_10bit);
+	codec_hevc_set_mc(sess, hevc->cur_frame);
+	codec_hevc_set_mcrcc(sess);
+	codec_hevc_set_mpred(sess, hevc->cur_frame, hevc->col_frame);
+	codec_hevc_set_sao(sess, hevc->cur_frame);
+
+	amvdec_write_dos_bits(core, HEVC_WAIT_FLAG, BIT(1));
+	amvdec_write_dos(core, HEVC_DEC_STATUS_REG,
+			 HEVC_CODED_SLICE_SEGMENT_DAT);
+
+	/* Interrupt the firmware's processor */
+	amvdec_write_dos(core, HEVC_MCPU_INTR_REQ, AMRISC_MAIN_REQ);
+
+	return 0;
+}
+
+static int codec_hevc_process_rpm(struct codec_hevc *hevc)
+{
+	union rpm_param *param = &hevc->rpm_param;
+	int src_changed = 0;
+	u32 dst_width, dst_height;
+	u32 lcu_size;
+	u32 is_10bit = 0;
+
+	if (param->p.slice_segment_address	||
+	    !param->p.pic_width_in_luma_samples	||
+	    !param->p.pic_height_in_luma_samples)
+		return 0;
+
+	if (param->p.bit_depth)
+		is_10bit = 1;
+
+	hevc->width = param->p.pic_width_in_luma_samples;
+	hevc->height = param->p.pic_height_in_luma_samples;
+	dst_width = hevc->width;
+	dst_height = hevc->height;
+
+	lcu_size = 1 << (param->p.log2_min_coding_block_size_minus3 +
+		   3 + param->p.log2_diff_max_min_coding_block_size);
+
+	hevc->lcu_x_num = (hevc->width + lcu_size - 1) / lcu_size;
+	hevc->lcu_y_num = (hevc->height + lcu_size - 1) / lcu_size;
+	hevc->lcu_total = hevc->lcu_x_num * hevc->lcu_y_num;
+
+	if (param->p.conformance_window_flag) {
+		u32 sub_width = 1, sub_height = 1;
+
+		switch (param->p.chroma_format_idc) {
+		case 1:
+			sub_height = 2;
+			fallthrough;
+		case 2:
+			sub_width = 2;
+			break;
+		}
+
+		dst_width -= sub_width *
+			     (param->p.conf_win_left_offset +
+			      param->p.conf_win_right_offset);
+		dst_height -= sub_height *
+			      (param->p.conf_win_top_offset +
+			       param->p.conf_win_bottom_offset);
+	}
+
+	if (dst_width != hevc->dst_width ||
+	    dst_height != hevc->dst_height ||
+	    lcu_size != hevc->lcu_size ||
+	    is_10bit != hevc->is_10bit)
+		src_changed = 1;
+
+	hevc->dst_width = dst_width;
+	hevc->dst_height = dst_height;
+	hevc->lcu_size = lcu_size;
+	hevc->is_10bit = is_10bit;
+
+	return src_changed;
+}
+
+/*
+ * The RPM section within the workspace contains
+ * many information regarding the parsed bitstream
+ */
+static void codec_hevc_fetch_rpm(struct amvdec_session *sess)
+{
+	struct codec_hevc *hevc = sess->priv;
+	u16 *rpm_vaddr = hevc->workspace_vaddr + RPM_OFFSET;
+	int i, j;
+
+	for (i = 0; i < RPM_SIZE; i += 4) {
+		for (j = 0; j < 4; j++)
+			hevc->rpm_param.l.data[i + j] =
+				rpm_vaddr[i + 3 - j];
+	}
+}
+
+static void codec_hevc_resume(struct amvdec_session *sess)
+{
+	struct codec_hevc *hevc = sess->priv;
+
+	if (codec_hevc_setup_buffers(sess, &hevc->common, hevc->is_10bit)) {
+		amvdec_abort(sess);
+		return;
+	}
+
+	codec_hevc_setup_decode_head(sess, hevc->is_10bit);
+	codec_hevc_process_segment_header(sess);
+	if (codec_hevc_process_segment(sess))
+		amvdec_abort(sess);
+}
+
+static irqreturn_t codec_hevc_threaded_isr(struct amvdec_session *sess)
+{
+	struct amvdec_core *core = sess->core;
+	struct codec_hevc *hevc = sess->priv;
+	u32 dec_status = amvdec_read_dos(core, HEVC_DEC_STATUS_REG);
+
+	if (!hevc)
+		return IRQ_HANDLED;
+
+	mutex_lock(&hevc->lock);
+	if (dec_status != HEVC_SLICE_SEGMENT_DONE) {
+		dev_err(core->dev_dec, "Unrecognized dec_status: %08X\n",
+			dec_status);
+		amvdec_abort(sess);
+		goto unlock;
+	}
+
+	sess->keyframe_found = 1;
+	codec_hevc_fetch_rpm(sess);
+	if (codec_hevc_process_rpm(hevc)) {
+		amvdec_src_change(sess, hevc->dst_width, hevc->dst_height, 16,
+				  hevc->is_10bit ? 10 : 8);
+		goto unlock;
+	}
+
+	codec_hevc_process_segment_header(sess);
+	if (codec_hevc_process_segment(sess))
+		amvdec_abort(sess);
+
+unlock:
+	mutex_unlock(&hevc->lock);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t codec_hevc_isr(struct amvdec_session *sess)
+{
+	return IRQ_WAKE_THREAD;
+}
+
+struct amvdec_codec_ops codec_hevc_ops = {
+	.start = codec_hevc_start,
+	.stop = codec_hevc_stop,
+	.isr = codec_hevc_isr,
+	.threaded_isr = codec_hevc_threaded_isr,
+	.num_pending_bufs = codec_hevc_num_pending_bufs,
+	.drain = codec_hevc_flush_output,
+	.resume = codec_hevc_resume,
+};
diff --git a/drivers/staging/media/meson/vdec/codec_hevc.h b/drivers/staging/media/meson/vdec/codec_hevc.h
new file mode 100644
index 000000000000..f2f9b2464df1
--- /dev/null
+++ b/drivers/staging/media/meson/vdec/codec_hevc.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018 Maxime Jourdan <maxi.jourdan@wanadoo.fr>
+ */
+
+#ifndef __MESON_VDEC_CODEC_HEVC_H_
+#define __MESON_VDEC_CODEC_HEVC_H_
+
+#include "vdec.h"
+
+extern struct amvdec_codec_ops codec_hevc_ops;
+
+#endif
diff --git a/drivers/staging/media/meson/vdec/esparser.c b/drivers/staging/media/meson/vdec/esparser.c
index 3cd29ab4f979..6988348ce714 100644
--- a/drivers/staging/media/meson/vdec/esparser.c
+++ b/drivers/staging/media/meson/vdec/esparser.c
@@ -310,7 +310,8 @@ esparser_queue(struct amvdec_session *sess, struct vb2_v4l2_buffer *vbuf)
 	 * they could pause when there is no capture buffer available and
 	 * resume on this notification.
 	 */
-	if (sess->fmt_out->pixfmt == V4L2_PIX_FMT_VP9) {
+	if (sess->fmt_out->pixfmt == V4L2_PIX_FMT_VP9 ||
+	    sess->fmt_out->pixfmt == V4L2_PIX_FMT_HEVC) {
 		if (codec_ops->num_pending_bufs)
 			num_dst_bufs = codec_ops->num_pending_bufs(sess);
 
diff --git a/drivers/staging/media/meson/vdec/hevc_regs.h b/drivers/staging/media/meson/vdec/hevc_regs.h
index 0392f41a1eed..e7eabdd2b119 100644
--- a/drivers/staging/media/meson/vdec/hevc_regs.h
+++ b/drivers/staging/media/meson/vdec/hevc_regs.h
@@ -205,6 +205,7 @@
 #define HEVC_CM_HEADER_START_ADDR 0xd8a0
 #define HEVC_CM_HEADER_LENGTH 0xd8a4
 #define HEVC_CM_HEADER_OFFSET 0xd8ac
+#define HEVC_SAO_CTRL9 0xd8b4
 #define HEVC_SAO_MMU_VH0_ADDR 0xd8e8
 #define HEVC_SAO_MMU_VH1_ADDR 0xd8ec
 
diff --git a/drivers/staging/media/meson/vdec/vdec_platform.c b/drivers/staging/media/meson/vdec/vdec_platform.c
index 88c9d72e1c83..ea2aa0e8cf0b 100644
--- a/drivers/staging/media/meson/vdec/vdec_platform.c
+++ b/drivers/staging/media/meson/vdec/vdec_platform.c
@@ -11,10 +11,23 @@
 #include "vdec_hevc.h"
 #include "codec_mpeg12.h"
 #include "codec_h264.h"
+#include "codec_hevc.h"
 #include "codec_vp9.h"
 
 static const struct amvdec_format vdec_formats_gxbb[] = {
 	{
+		.pixfmt = V4L2_PIX_FMT_HEVC,
+		.min_buffers = 4,
+		.max_buffers = 24,
+		.max_width = 3840,
+		.max_height = 2160,
+		.vdec_ops = &vdec_hevc_ops,
+		.codec_ops = &codec_hevc_ops,
+		.firmware_path = "meson/vdec/gxl_hevc.bin",
+		.pixfmts_cap = { V4L2_PIX_FMT_NV12M, 0 },
+		.flags = V4L2_FMT_FLAG_COMPRESSED |
+			 V4L2_FMT_FLAG_DYN_RESOLUTION,
+	}, {
 		.pixfmt = V4L2_PIX_FMT_H264,
 		.min_buffers = 2,
 		.max_buffers = 24,
@@ -64,6 +77,18 @@ static const struct amvdec_format vdec_formats_gxl[] = {
 		.pixfmts_cap = { V4L2_PIX_FMT_NV12M, 0 },
 		.flags = V4L2_FMT_FLAG_COMPRESSED |
 			 V4L2_FMT_FLAG_DYN_RESOLUTION,
+	}, {
+		.pixfmt = V4L2_PIX_FMT_HEVC,
+		.min_buffers = 4,
+		.max_buffers = 24,
+		.max_width = 3840,
+		.max_height = 2160,
+		.vdec_ops = &vdec_hevc_ops,
+		.codec_ops = &codec_hevc_ops,
+		.firmware_path = "meson/vdec/gxl_hevc.bin",
+		.pixfmts_cap = { V4L2_PIX_FMT_NV12M, 0 },
+		.flags = V4L2_FMT_FLAG_COMPRESSED |
+			 V4L2_FMT_FLAG_DYN_RESOLUTION,
 	}, {
 		.pixfmt = V4L2_PIX_FMT_H264,
 		.min_buffers = 2,
@@ -114,6 +139,18 @@ static const struct amvdec_format vdec_formats_gxm[] = {
 		.pixfmts_cap = { V4L2_PIX_FMT_NV12M, 0 },
 		.flags = V4L2_FMT_FLAG_COMPRESSED |
 			 V4L2_FMT_FLAG_DYN_RESOLUTION,
+	}, {
+		.pixfmt = V4L2_PIX_FMT_HEVC,
+		.min_buffers = 4,
+		.max_buffers = 24,
+		.max_width = 3840,
+		.max_height = 2160,
+		.vdec_ops = &vdec_hevc_ops,
+		.codec_ops = &codec_hevc_ops,
+		.firmware_path = "meson/vdec/gxl_hevc.bin",
+		.pixfmts_cap = { V4L2_PIX_FMT_NV12M, 0 },
+		.flags = V4L2_FMT_FLAG_COMPRESSED |
+			 V4L2_FMT_FLAG_DYN_RESOLUTION,
 	}, {
 		.pixfmt = V4L2_PIX_FMT_H264,
 		.min_buffers = 2,
-- 
2.34.1


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