Can't extract the dtb.img on google-blueline

[phodina]

Hi, I've attempted to extract the dtb out of the boot.img for google-blueline. I've used the https://mirrorbits.lineageos.org/full/blueline/20230620/boot.img

But after running the following commands I get an error

$ tools/unpackbootimg.py boot.img
$ tools/unpackqcdt.py dt.img
Traceback (most recent call last):
  File "/home/cylon2p0/linux-mdss-dsi-panel-driver-generator/tools/unpackqcdt.py", line 34, in <module>
    magic, version, n = struct.unpack(HEADER_FORMAT, b[:HEADER_SIZE])
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
struct.error: unpack requires a buffer of 12 bytes

Could it be due to the fact google-blueline requires a special hack due to the implementation in the bootloader? https://gitlab.com/postmarketOS/pmaports/-/merge_requests/3932/diffs?commit_id=152a7d398fa655a8a686c34654ea9370feef2c3f#2a69d86c24b94fa0c238d1653c5b9a03d14271d6

[phodina]

I was able to generate the driver for the panel from the dtsi file from the downstream kernel.

[stephan-gh]

Could it be due to the fact google-blueline requires a special hack due to the implementation in the bootloader? https://gitlab.com/postmarketOS/pmaports/-/merge_requests/3932/diffs?commit_id=152a7d398fa655a8a686c34654ea9370feef2c3f#2a69d86c24b94fa0c238d1653c5b9a03d14271d6

I don't think this is related. This device is likely using a much newer version of the Android boot image format that isn't supported by the unpackbootimg.py.

It's hard to keep up with all the new boot img standards that are happening. You may want to use a different tool to extract the dtb, such as extract-dtb which works correctly on your boot.img. Perhaps I should remove the ones inside linux-mdss-dsi-panel-driver-generator if they are causing too much confusion.