Hi, On 05/01/2024 09:25, Thomas Zimmermann wrote:
I/O video memory for the framebuffer supports write-combine caching mode. Simplify the driver's code that sets up the caching mode. * Map video memory with ioremap_wc(), which automatically sets up the PAT entry with write-combine caching. * Remove the now obsolete call to devm_arch_io_reserve_memtype_wc(). It is only required to mmap the video memory to user space, which the driver doesn't do. * According to the PAT documentation, arch_phys_wc_add() is best called after remapping I/O memory, so move it after ioremap.
Thanks a lot for taking some time to look at the latency issue. This looks good to me. Reviewed-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx> -- Jocelyn
