[PATCH v5 4/9] vcodec: mediatek: Add Mediatek H264 Video Decoder Drive
Tiffany Lin
tiffany.lin at mediatek.com
Fri Sep 2 05:19:55 PDT 2016
Add h264 decoder driver for MT8173
Signed-off-by: PC Chen <pc.chen at mediatek.com>
Signed-off-by: Tiffany Lin <tiffany.lin at mediatek.com>
---
drivers/media/platform/mtk-vcodec/Makefile | 3 +-
.../media/platform/mtk-vcodec/vdec/vdec_h264_if.c | 506 ++++++++++++++++++++
drivers/media/platform/mtk-vcodec/vdec_drv_if.c | 3 +
3 files changed, 511 insertions(+), 1 deletion(-)
create mode 100644 drivers/media/platform/mtk-vcodec/vdec/vdec_h264_if.c
diff --git a/drivers/media/platform/mtk-vcodec/Makefile b/drivers/media/platform/mtk-vcodec/Makefile
index b54e823..58243ed 100644
--- a/drivers/media/platform/mtk-vcodec/Makefile
+++ b/drivers/media/platform/mtk-vcodec/Makefile
@@ -3,7 +3,8 @@ obj-$(CONFIG_VIDEO_MEDIATEK_VCODEC) += mtk-vcodec-dec.o \
mtk-vcodec-enc.o \
mtk-vcodec-common.o
-mtk-vcodec-dec-y := mtk_vcodec_dec_drv.o \
+mtk-vcodec-dec-y := vdec/vdec_h264_if.o \
+ mtk_vcodec_dec_drv.o \
vdec_drv_if.o \
vdec_vpu_if.o \
mtk_vcodec_dec.o \
diff --git a/drivers/media/platform/mtk-vcodec/vdec/vdec_h264_if.c b/drivers/media/platform/mtk-vcodec/vdec/vdec_h264_if.c
new file mode 100644
index 0000000..0353a47
--- /dev/null
+++ b/drivers/media/platform/mtk-vcodec/vdec/vdec_h264_if.c
@@ -0,0 +1,506 @@
+/*
+ * Copyright (c) 2016 MediaTek Inc.
+ * Author: PC Chen <pc.chen at mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "../vdec_drv_if.h"
+#include "../mtk_vcodec_util.h"
+#include "../mtk_vcodec_dec.h"
+#include "../mtk_vcodec_intr.h"
+#include "../vdec_vpu_if.h"
+#include "../vdec_drv_base.h"
+
+#define NAL_NON_IDR_SLICE 0x01
+#define NAL_IDR_SLICE 0x05
+#define NAL_H264_PPS 0x08
+#define NAL_TYPE(value) ((value) & 0x1F)
+
+#define BUF_PREDICTION_SZ (32 * 1024)
+
+#define MB_UNIT_LEN 16
+
+/* motion vector size (bytes) for every macro block */
+#define HW_MB_STORE_SZ 64
+
+#define H264_MAX_FB_NUM 17
+#define HDR_PARSING_BUF_SZ 1024
+
+/**
+ * struct h264_fb - h264 decode frame buffer information
+ * @vdec_fb_va : virtual address of struct vdec_fb
+ * @y_fb_dma : dma address of Y frame buffer (luma)
+ * @c_fb_dma : dma address of C frame buffer (chroma)
+ * @poc : picture order count of frame buffer
+ * @reserved : for 8 bytes alignment
+ */
+struct h264_fb {
+ uint64_t vdec_fb_va;
+ uint64_t y_fb_dma;
+ uint64_t c_fb_dma;
+ int32_t poc;
+ uint32_t reserved;
+};
+
+/**
+ * struct h264_ring_fb_list - ring frame buffer list
+ * @fb_list : frame buffer arrary
+ * @read_idx : read index
+ * @write_idx : write index
+ * @count : buffer count in list
+ */
+struct h264_ring_fb_list {
+ struct h264_fb fb_list[H264_MAX_FB_NUM];
+ unsigned int read_idx;
+ unsigned int write_idx;
+ unsigned int count;
+ unsigned int reserved;
+};
+
+/**
+ * struct vdec_h264_dec_info - decode information
+ * @dpb_sz : decoding picture buffer size
+ * @resolution_changed : resoltion change happen
+ * @realloc_mv_buf : flag to notify driver to re-allocate mv buffer
+ * @reserved : for 8 bytes alignment
+ * @bs_dma : Input bit-stream buffer dma address
+ * @y_fb_dma : Y frame buffer dma address
+ * @c_fb_dma : C frame buffer dma address
+ * @vdec_fb_va : VDEC frame buffer struct virtual address
+ */
+struct vdec_h264_dec_info {
+ uint32_t dpb_sz;
+ uint32_t resolution_changed;
+ uint32_t realloc_mv_buf;
+ uint32_t reserved;
+ uint64_t bs_dma;
+ uint64_t y_fb_dma;
+ uint64_t c_fb_dma;
+ uint64_t vdec_fb_va;
+};
+
+/**
+ * struct vdec_h264_vsi - shared memory for decode information exchange
+ * between VPU and Host.
+ * The memory is allocated by VPU then mapping to Host
+ * in vpu_dec_init() and freed in vpu_dec_deinit()
+ * by VPU.
+ * AP-W/R : AP is writer/reader on this item
+ * VPU-W/R: VPU is write/reader on this item
+ * @hdr_buf : Header parsing buffer (AP-W, VPU-R)
+ * @pred_buf_dma : HW working predication buffer dma address (AP-W, VPU-R)
+ * @mv_buf_dma : HW working motion vector buffer dma address (AP-W, VPU-R)
+ * @list_free : free frame buffer ring list (AP-W/R, VPU-W)
+ * @list_disp : display frame buffer ring list (AP-R, VPU-W)
+ * @dec : decode information (AP-R, VPU-W)
+ * @pic : picture information (AP-R, VPU-W)
+ * @crop : crop information (AP-R, VPU-W)
+ */
+struct vdec_h264_vsi {
+ unsigned char hdr_buf[HDR_PARSING_BUF_SZ];
+ uint64_t pred_buf_dma;
+ uint64_t mv_buf_dma[H264_MAX_FB_NUM];
+ struct h264_ring_fb_list list_free;
+ struct h264_ring_fb_list list_disp;
+ struct vdec_h264_dec_info dec;
+ struct vdec_pic_info pic;
+ struct v4l2_rect crop;
+};
+
+/**
+ * struct vdec_h264_inst - h264 decoder instance
+ * @num_nalu : how many nalus be decoded
+ * @ctx : point to mtk_vcodec_ctx
+ * @pred_buf : HW working predication buffer
+ * @mv_buf : HW working motion vector buffer
+ * @vpu : VPU instance
+ * @vsi : VPU shared information
+ */
+struct vdec_h264_inst {
+ unsigned int num_nalu;
+ struct mtk_vcodec_ctx *ctx;
+ struct mtk_vcodec_mem pred_buf;
+ struct mtk_vcodec_mem mv_buf[H264_MAX_FB_NUM];
+ struct vdec_vpu_inst vpu;
+ struct vdec_h264_vsi *vsi;
+};
+
+static unsigned int get_mv_buf_size(unsigned int width, unsigned int height)
+{
+ return HW_MB_STORE_SZ * (width/MB_UNIT_LEN) * (height/MB_UNIT_LEN);
+}
+
+static int allocate_predication_buf(struct vdec_h264_inst *inst)
+{
+ int err = 0;
+
+ inst->pred_buf.size = BUF_PREDICTION_SZ;
+ err = mtk_vcodec_mem_alloc(inst->ctx, &inst->pred_buf);
+ if (err) {
+ mtk_vcodec_err(inst, "failed to allocate ppl buf");
+ return err;
+ }
+
+ inst->vsi->pred_buf_dma = inst->pred_buf.dma_addr;
+ return 0;
+}
+
+static void free_predication_buf(struct vdec_h264_inst *inst)
+{
+ struct mtk_vcodec_mem *mem = NULL;
+
+ mtk_vcodec_debug_enter(inst);
+
+ inst->vsi->pred_buf_dma = 0;
+ mem = &inst->pred_buf;
+ if (mem->va)
+ mtk_vcodec_mem_free(inst->ctx, mem);
+}
+
+static int alloc_mv_buf(struct vdec_h264_inst *inst, struct vdec_pic_info *pic)
+{
+ int i;
+ int err;
+ struct mtk_vcodec_mem *mem = NULL;
+ unsigned int buf_sz = get_mv_buf_size(pic->buf_w, pic->buf_h);
+
+ for (i = 0; i < H264_MAX_FB_NUM; i++) {
+ mem = &inst->mv_buf[i];
+ if (mem->va)
+ mtk_vcodec_mem_free(inst->ctx, mem);
+ mem->size = buf_sz;
+ err = mtk_vcodec_mem_alloc(inst->ctx, mem);
+ if (err) {
+ mtk_vcodec_err(inst, "failed to allocate mv buf");
+ return err;
+ }
+ inst->vsi->mv_buf_dma[i] = mem->dma_addr;
+ }
+
+ return 0;
+}
+
+static void free_mv_buf(struct vdec_h264_inst *inst)
+{
+ int i;
+ struct mtk_vcodec_mem *mem = NULL;
+
+ for (i = 0; i < H264_MAX_FB_NUM; i++) {
+ inst->vsi->mv_buf_dma[i] = 0;
+ mem = &inst->mv_buf[i];
+ if (mem->va)
+ mtk_vcodec_mem_free(inst->ctx, mem);
+ }
+}
+
+static int check_list_validity(struct vdec_h264_inst *inst, bool disp_list)
+{
+ struct h264_ring_fb_list *list;
+
+ list = disp_list ? &inst->vsi->list_disp : &inst->vsi->list_free;
+
+ if (list->count > H264_MAX_FB_NUM ||
+ list->read_idx >= H264_MAX_FB_NUM ||
+ list->write_idx >= H264_MAX_FB_NUM) {
+ mtk_vcodec_err(inst, "%s list err: cnt=%d r_idx=%d w_idx=%d",
+ disp_list ? "disp" : "free", list->count,
+ list->read_idx, list->write_idx);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void put_fb_to_free(struct vdec_h264_inst *inst, struct vdec_fb *fb)
+{
+ struct h264_ring_fb_list *list;
+
+ if (fb) {
+ if (check_list_validity(inst, false))
+ return;
+
+ list = &inst->vsi->list_free;
+ if (list->count == H264_MAX_FB_NUM) {
+ mtk_vcodec_err(inst, "[FB] put fb free_list full");
+ return;
+ }
+
+ mtk_vcodec_debug(inst, "[FB] put fb into free_list @(%p, %llx)",
+ fb->base_y.va, (u64)fb->base_y.dma_addr);
+
+ list->fb_list[list->write_idx].vdec_fb_va = (u64)fb;
+ list->write_idx = (list->write_idx == H264_MAX_FB_NUM - 1) ?
+ 0 : list->write_idx + 1;
+ list->count++;
+ }
+}
+
+static void get_pic_info(struct vdec_h264_inst *inst,
+ struct vdec_pic_info *pic)
+{
+ *pic = inst->vsi->pic;
+ mtk_vcodec_debug(inst, "pic(%d, %d), buf(%d, %d)",
+ pic->pic_w, pic->pic_h, pic->buf_w, pic->buf_h);
+ mtk_vcodec_debug(inst, "Y(%d, %d), C(%d, %d)", pic->y_bs_sz,
+ pic->y_len_sz, pic->c_bs_sz, pic->c_len_sz);
+}
+
+static void get_crop_info(struct vdec_h264_inst *inst, struct v4l2_rect *cr)
+{
+ cr->left = inst->vsi->crop.left;
+ cr->top = inst->vsi->crop.top;
+ cr->width = inst->vsi->crop.width;
+ cr->height = inst->vsi->crop.height;
+
+ mtk_vcodec_debug(inst, "l=%d, t=%d, w=%d, h=%d",
+ cr->left, cr->top, cr->width, cr->height);
+}
+
+static void get_dpb_size(struct vdec_h264_inst *inst, unsigned int *dpb_sz)
+{
+ *dpb_sz = inst->vsi->dec.dpb_sz;
+ mtk_vcodec_debug(inst, "sz=%d", *dpb_sz);
+}
+
+static int vdec_h264_init(struct mtk_vcodec_ctx *ctx, unsigned long *h_vdec)
+{
+ struct vdec_h264_inst *inst = NULL;
+ int err;
+
+ inst = kzalloc(sizeof(*inst), GFP_KERNEL);
+ if (!inst)
+ return -ENOMEM;
+
+ inst->ctx = ctx;
+
+ inst->vpu.id = IPI_VDEC_H264;
+ inst->vpu.dev = ctx->dev->vpu_plat_dev;
+ inst->vpu.ctx = ctx;
+ inst->vpu.handler = vpu_dec_ipi_handler;
+
+ err = vpu_dec_init(&inst->vpu);
+ if (err) {
+ mtk_vcodec_err(inst, "vdec_h264 init err=%d", err);
+ goto error_free_inst;
+ }
+
+ inst->vsi = (struct vdec_h264_vsi *)inst->vpu.vsi;
+ err = allocate_predication_buf(inst);
+ if (err)
+ goto error_deinit;
+
+ mtk_vcodec_debug(inst, "H264 Instance >> %p", inst);
+
+ *h_vdec = (unsigned long)inst;
+ return 0;
+
+error_deinit:
+ vpu_dec_deinit(&inst->vpu);
+
+error_free_inst:
+ kfree(inst);
+ return err;
+}
+
+static void vdec_h264_deinit(unsigned long h_vdec)
+{
+ struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec;
+
+ mtk_vcodec_debug_enter(inst);
+
+ vpu_dec_deinit(&inst->vpu);
+ free_predication_buf(inst);
+ free_mv_buf(inst);
+
+ kfree(inst);
+}
+
+static int find_start_code(unsigned char *data, unsigned int data_sz)
+{
+ if (data_sz > 3 && data[0] == 0 && data[1] == 0 && data[2] == 1)
+ return 3;
+
+ if (data_sz > 4 && data[0] == 0 && data[1] == 0 && data[2] == 0 &&
+ data[3] == 1)
+ return 4;
+
+ return -1;
+}
+
+static int vdec_h264_decode(unsigned long h_vdec, struct mtk_vcodec_mem *bs,
+ struct vdec_fb *fb, bool *res_chg)
+{
+ struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec;
+ struct vdec_vpu_inst *vpu = &inst->vpu;
+ int nal_start_idx = 0;
+ int err = 0;
+ unsigned int nal_start;
+ unsigned int nal_type;
+ unsigned char *buf;
+ unsigned int buf_sz;
+ unsigned int data[2];
+ uint64_t vdec_fb_va = (u64)fb;
+ uint64_t y_fb_dma = fb ? (u64)fb->base_y.dma_addr : 0;
+ uint64_t c_fb_dma = fb ? (u64)fb->base_c.dma_addr : 0;
+
+ mtk_vcodec_debug(inst, "+ [%d] FB y_dma=%llx c_dma=%llx va=%p",
+ ++inst->num_nalu, y_fb_dma, c_fb_dma, fb);
+
+ /* bs NULL means flush decoder */
+ if (bs == NULL)
+ return vpu_dec_reset(vpu);
+
+ buf = (unsigned char *)bs->va;
+ buf_sz = bs->size;
+ nal_start_idx = find_start_code(buf, buf_sz);
+ if (nal_start_idx < 0)
+ goto err_free_fb_out;
+
+ nal_start = buf[nal_start_idx];
+ nal_type = NAL_TYPE(buf[nal_start_idx]);
+ mtk_vcodec_debug(inst, "\n + NALU[%d] type %d +\n", inst->num_nalu,
+ nal_type);
+
+ if (nal_type == NAL_H264_PPS) {
+ buf_sz -= nal_start_idx;
+ if (buf_sz > HDR_PARSING_BUF_SZ) {
+ err = -EILSEQ;
+ goto err_free_fb_out;
+ }
+ memcpy(inst->vsi->hdr_buf, buf + nal_start_idx, buf_sz);
+ }
+
+ inst->vsi->dec.bs_dma = (uint64_t)bs->dma_addr;
+ inst->vsi->dec.y_fb_dma = y_fb_dma;
+ inst->vsi->dec.c_fb_dma = c_fb_dma;
+ inst->vsi->dec.vdec_fb_va = vdec_fb_va;
+
+ data[0] = buf_sz;
+ data[1] = nal_start;
+ err = vpu_dec_start(vpu, data, 2);
+ if (err)
+ goto err_free_fb_out;
+
+ *res_chg = inst->vsi->dec.resolution_changed;
+ if (*res_chg) {
+ struct vdec_pic_info pic;
+
+ mtk_vcodec_debug(inst, "- resolution changed -");
+ get_pic_info(inst, &pic);
+
+ if (inst->vsi->dec.realloc_mv_buf) {
+ err = alloc_mv_buf(inst, &pic);
+ if (err)
+ goto err_free_fb_out;
+ }
+ }
+
+ if (nal_type == NAL_NON_IDR_SLICE || nal_type == NAL_IDR_SLICE) {
+ /* wait decoder done interrupt */
+ err = mtk_vcodec_wait_for_done_ctx(inst->ctx,
+ MTK_INST_IRQ_RECEIVED,
+ WAIT_INTR_TIMEOUT_MS);
+ if (err)
+ goto err_free_fb_out;
+
+ vpu_dec_end(vpu);
+ }
+
+ mtk_vcodec_debug(inst, "\n - NALU[%d] type=%d -\n", inst->num_nalu,
+ nal_type);
+ return 0;
+
+err_free_fb_out:
+ put_fb_to_free(inst, fb);
+ mtk_vcodec_err(inst, "\n - NALU[%d] err=%d -\n", inst->num_nalu, err);
+ return err;
+}
+
+static void vdec_h264_get_fb(struct vdec_h264_inst *inst,
+ struct h264_ring_fb_list *list,
+ bool disp_list, struct vdec_fb **out_fb)
+{
+ struct vdec_fb *fb;
+
+ if (check_list_validity(inst, disp_list))
+ return;
+
+ if (list->count == 0) {
+ mtk_vcodec_debug(inst, "[FB] there is no %s fb",
+ disp_list ? "disp" : "free");
+ *out_fb = NULL;
+ return;
+ }
+
+ fb = (struct vdec_fb *)list->fb_list[list->read_idx].vdec_fb_va;
+ fb->status |= (disp_list ? FB_ST_DISPLAY : FB_ST_FREE);
+
+ *out_fb = fb;
+ mtk_vcodec_debug(inst, "[FB] get %s fb st=%d poc=%d %llx",
+ disp_list ? "disp" : "free",
+ fb->status, list->fb_list[list->read_idx].poc,
+ list->fb_list[list->read_idx].vdec_fb_va);
+
+ list->read_idx = (list->read_idx == H264_MAX_FB_NUM - 1) ?
+ 0 : list->read_idx + 1;
+ list->count--;
+}
+
+static int vdec_h264_get_param(unsigned long h_vdec,
+ enum vdec_get_param_type type, void *out)
+{
+ struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec;
+
+ switch (type) {
+ case GET_PARAM_DISP_FRAME_BUFFER:
+ vdec_h264_get_fb(inst, &inst->vsi->list_disp, true, out);
+ break;
+
+ case GET_PARAM_FREE_FRAME_BUFFER:
+ vdec_h264_get_fb(inst, &inst->vsi->list_free, false, out);
+ break;
+
+ case GET_PARAM_PIC_INFO:
+ get_pic_info(inst, out);
+ break;
+
+ case GET_PARAM_DPB_SIZE:
+ get_dpb_size(inst, out);
+ break;
+
+ case GET_PARAM_CROP_INFO:
+ get_crop_info(inst, out);
+ break;
+
+ default:
+ mtk_vcodec_err(inst, "invalid get parameter type=%d", type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct vdec_common_if vdec_h264_if = {
+ vdec_h264_init,
+ vdec_h264_decode,
+ vdec_h264_get_param,
+ vdec_h264_deinit,
+};
+
+struct vdec_common_if *get_h264_dec_comm_if(void);
+
+struct vdec_common_if *get_h264_dec_comm_if(void)
+{
+ return &vdec_h264_if;
+}
diff --git a/drivers/media/platform/mtk-vcodec/vdec_drv_if.c b/drivers/media/platform/mtk-vcodec/vdec_drv_if.c
index 3cb04ef..678b1f7 100644
--- a/drivers/media/platform/mtk-vcodec/vdec_drv_if.c
+++ b/drivers/media/platform/mtk-vcodec/vdec_drv_if.c
@@ -23,6 +23,7 @@
#include "mtk_vcodec_dec_pm.h"
#include "mtk_vpu.h"
+const struct vdec_common_if *get_h264_dec_comm_if(void);
int vdec_if_init(struct mtk_vcodec_ctx *ctx, unsigned int fourcc)
{
@@ -30,6 +31,8 @@ int vdec_if_init(struct mtk_vcodec_ctx *ctx, unsigned int fourcc)
switch (fourcc) {
case V4L2_PIX_FMT_H264:
+ ctx->dec_if = get_h264_dec_comm_if();
+ break;
case V4L2_PIX_FMT_VP8:
default:
return -EINVAL;
--
1.7.9.5
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