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 <jfale...@redhat.com>
--
Jocelyn
