S3C6410 MFC decode H.264流程（3

今天用三星的测试程序跑了一下H.264,发现颜色正常，打印出的信息有所不同。
covia android解码时的ioctrl命令为
s3c_mfc_ioctl: cmd = 800007
s3c_mfc_ioctl: cmd = 800011

测试程序解码为
s3c_mfc_ioctl: cmd = 800007
s3c_mfc_ioctl: cmd = 800013

前面分析过s3c_mfc_ioctl: cmd = 800011是将YUV数据返回用户
而s3c_mfc_ioctl: cmd = 800013和前者不一样的地方在于：
1）databuf_paddr = (unsigned int)S3C_MFC_BASEADDR_DATA_BUF;
//直接用寄存器（Physical Base Address for the MFC Data Buffer ）地址填充
2）args.get_buf_addr.out_buf_addr = databuf_paddr + offset;
//输出地址用paddr填充，databuf_paddr

分析：
MFC转换出的数据格式是YUV的。
三星的测试程序使用了Post Processor驱动，800013命令返回物理地址给pp使用，直接刷到fb上。
推测covia的驱动可能没有使用pp，而是手动做的YUV2RGB再刷到fb，仅仅是推测，因为q5的内核也含有pp驱动。

附录：一些代码及调试信息
case S3C_MFC_IOCTL_MFC_GET_PHY_FRAM_BUF_ADDR:
   mutex_lock(s3c_mfc_mutex);

   out = copy_from_user(&args.get_buf_addr,
    (s3c_mfc_get_buf_addr_arg_t *)arg,
    sizeof(s3c_mfc_get_buf_addr_arg_t));

   yuv_size = (pMfcInst->buf_width * pMfcInst->buf_height * 3) >> 1;
   args.get_buf_addr.out_buf_size = yuv_size;
   yuv_buffer = (unsigned int)pMfcInst->yuv_buffer;
   run_index = pMfcInst->run_index;
   out_buf_size = args.get_buf_addr.out_buf_size;
   databuf_vaddr = (unsigned int)s3c_mfc_get_databuf_virt_addr();
   databuf_paddr = (unsigned int)S3C_MFC_BASEADDR_DATA_BUF;
   offset = yuv_buffer + run_index * out_buf_size - databuf_vaddr;  
  
   args.get_buf_addr.out_buf_addr = databuf_paddr + offset;
   args.get_buf_addr.ret_code = S3C_MFC_INST_RET_OK;

   out = copy_to_user((s3c_mfc_get_buf_addr_arg_t *)arg,
    &args.get_buf_addr, sizeof(s3c_mfc_get_buf_addr_arg_t));

   mutex_unlock(s3c_mfc_mutex);
   break;

========= S3C6400/6410 Demo Application ==========
=                                                =
= 1.   H.264 display                            =
= 2.   MPEG4 display                            =
= 3.   H.263 display                            =
= 4.   VC-1 display                            =
= 5.   4-windows display                        =
= 6.   Display using local path                 =
= 7.   Display using double buffering           =
= 8.   Camera preview & MFC encoding            =
= 9.   MFC decoding & Camera preview            =
= 10. Camera preview & MFC encoding/decoding   =
= 11. Camera input and JPEG encoding           =
= 12. JPEG decoding and display                =
= 13. Exit                                     =
=                                                =
==================================================
Select number --> 1
s3c_mfc_yuv_buffer_mgr_final
address of segment_info=c141c400, address of commit_info =c1426040
s3c_mfc_init_hw: downloading firmware into bitprocessor
s3c_mfc_get_firmware_ver: GET_FW_VER command was issued
s3c_mfc_get_firmware_ver: GET_FW_VER => 0xf202, 0x130e
s3c_mfc_get_firmware_ver: BUSY_FLAG => 0
s3c_mfc_get_stream_buffer_addr: ctx->stream_buffer address 0xc0f46000
s3c_mfc_get_stream_buffer_addr: ctx->phys_addr_stream_buffer address 0x50f46000
s3c_mfc_inst_create: state = 10
s3c_mfc_open: mfc open success
s3c_mfc_ioctl: cmd = 80000f
s3c_mfc_ioctl: cmd = 800005
s3c_mfc_inst_init_dec: strm_leng = 7956
s3c_mfc_inst_init_dec: ctx->inst_no = 0
s3c_mfc_inst_init_dec: ctx->codec_mode = 2
s3c_mfc_inst_init_dec: sequece bit buffer size = 500 (kb)
s3c_mfc_inst_init_dec: RET_DEC_SEQ_SRC_SIZE = 327920
s3c_mfc_inst_init_dec: RET_DEC_SEQ_SRC_FRAME_RATE   = 0
s3c_mfc_inst_init_dec: RET_DEC_SEQ_FRAME_NEED_COUNT = 4
s3c_mfc_inst_init_dec: RET_DEC_SEQ_FRAME_DELAY = 0
s3c_mfc_inst_init_dec: width = 320, height = 240, buf_width = 320, buf_height = 240
s3c_mfc_print_commit_yuv_buffer_info: commit index = 000, base segment index = 0
s3c_mfc_print_commit_yuv_buffer_info: commit index = 000, number of segment = 509
s3c_mfc_get_yuv_buffer_addr: ctx->inst_no : 0
s3c_mfc_get_yuv_buffer_addr: ctx->yuv_buffer : 0xc1040000
s3c_mfc_get_yuv_buffer_addr: ctx->phys_addr_yuv_buffer : 0x51040000
s3c_mfc_ioctl: cmd = 800007
        ######## width=320   height=240.
s3c_mfc_ioctl: cmd = 800013
s3c_mfc_ioctl: cmd = 800007
s3c_mfc_ioctl: cmd = 800013
s3c_mfc_ioctl: cmd = 800007
s3c_mfc_ioctl: cmd = 800013
s3c_mfc_ioctl: cmd = 800007
s3c_mfc_ioctl: cmd = 800013
s3c_mfc_ioctl: cmd = 800007
s3c_mfc_ioctl: cmd = 800013