[PATCH v2] verdin-am62: fix FASTBOOT_BUF_ADDR and FASTBOOT_BUF_SIZE

[Francesco Dolcini]

On Tue, Dec 03, 2024 at 09:33:02AM -0300, Hiago De Franco wrote:
> From: Hiago De Franco <hiago.franco at toradex.com>
> 
> The current value of CONFIG_FASTBOOT_BUF_ADDR is incorrect for hardware
> with 512MB and 1GB of RAM. The RAM address ranges for these devices are:
> 
> - 512MB:
>   - Start: 0x80000000
>   - End:   0xA0000000
> - 1GB:
>   - Start: 0x80000000
>   - End:   0xC0000000
> 
> The current buffer address makes fastboot downloads work only on
> hardware with 2GB of RAM.
> 
> To fix this issue:
> 1. Lower CONFIG_FASTBOOT_BUF_ADDR to 0x88200000. This makes the buffer
>    to be equal ot CONFIG_SYS_LOAD_ADDR, which is a safe address to
>    download files using fastboot.
> 
> 2. Reduce the size of the download buffer to 128MB, avoiding overlaps
>    with RAMDISK_ADDR_R. This is a good enough value for individual
>    downloads.
> 
> These changes make fastboot downloads work with 512MB and 1GB devices.
> 
> Fixes: defe30a78b76 ("verdin-am62: add DFU, USB and UUU fastboot support")
> Signed-off-by: Hiago De Franco <hiago.franco at toradex.com>

Acked-by: Francesco Dolcini <francesco.dolcini at toradex.com>