Hi Simon,
I want to compress a FPGA Image on the fly via binman but this doesn't work. I have add a bintool implementation for gzip, add gzip support to comp_util.py and set `compress` and `compression` property in the binman node of the u-boot dtsi:
fpga-2cg { compatible = "u-boot,fpga-legacy"; description = "FPGA"; type = "fpga"; compression = "gzip"; load = <(CONFIG_SYS_TEXT_BASE + 0x4000000)>;
blob-ext { compress = "gzip"; filename = "2cg.bit.bin"; }; };
It works if I remove the `compress` property and use a `2cg.bit.bin.gz` or remove the header for gzip [1].
Regarding the code binman add the compressed size as first word to the data [2]. The code in spl-fit.c doesn't remove the size [3]. Why is this size added?
[1] https://source.denx.de/u-boot/u-boot/-/blob/master/tools/binman/comp_util.py... [2] https://source.denx.de/u-boot/u-boot/-/blob/master/tools/binman/entry.py#L10... [3] https://source.denx.de/u-boot/u-boot/-/blob/master/common/spl/spl_fit.c#L334
Regards Stefan