Mt6755 Scatter File -

Title: Technical Review: The MT6755 (Helio P10/P20) Scatter File Structure and Utility

Technical Write-Up: MT6755 Scatter File

Practical examples

1. Updating only recovery:

   • Set is_download: true for RECOVERY and false for others; file_name = recovery.img.
   • Flash with SP Flash Tool in "Download Only" mode.

2. Expanding userdata partition:

   • Adjust partition_size for USRDATA to a larger hex value in the scatter, then repartition (risky — backup first).
   • Example: change partition_size from 0x3D880000 to 0x4D880000.

3. Extracting partition offsets:

   • Use linear_start_addr to compute absolute offsets for raw dd operations if you can access eMMC from a host: offset = linear_start_addr in bytes.

Troubleshooting common errors

• "BROM ERROR : S_FT_ENABLE_DRAM_FAIL (0xFC0)" — wrong scatter/DA or missing DRAM settings. Use correct scatter/DA or different SP Flash Tool version.
• "S_COM_PORT_OPEN_FAIL" — driver issue; reinstall VCOM drivers.
• "S_DL_GET_DRAM_SETTING_FAIL" — incompatible preloader/DA; use firmware matching board revision.
• Bricked after flashing — try booting into preloader or bootloader and reflash correct scatter and firmware; professional repair may be needed.

C. Partition Resizing

Advanced users can edit the partition_size values in the scatter file to increase system partition space (often needed for GSI ROMs), though this requires repartitioning the entire memory and carries high risk. mt6755 scatter file