I think WSFB_VRAM_IS_RAM is meant to be a hint for what kind of memory you
get when you mmap the device. When shadow FB is used, that is generally
only used for rasops and mmap bypasses the shadow and uses device memory
directly. So I think this could cause performance regressions on such
hardware where shadow FB is enabled and reading VRAM is slow.
What problem are you attempting to solve with this change?
On Sun, 18 Oct 2020, Rin Okuyama wrote:
Module Name: src
Committed By: rin
Date: Sun Oct 18 11:54:21 UTC 2020
Modified Files:
src/sys/dev/wsfb: genfb.c
Log Message:
For WSDISPLAYIO_GET_FBINFO ioctl, set WSFB_VRAM_IS_RAM to fbi_flags
when shadow FB is used.
To generate a diff of this commit:
cvs rdiff -u -r1.74 -r1.75 src/sys/dev/wsfb/genfb.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
