d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Use VM_MEMATTR_WRITE_COMBINING memattr for mmap(2) on framebuffer

Browse Source 
VM_MEMATTR_WRITE_COMBINING sets write-through cache flag for framebuffer
memory that prevents pixel data from being stuck in cache until evicition
happens
This commit is contained in:
Oleksandr Tymoshenko 2016-10-01 17:57:32 +00:00
parent fe6f517cf0
commit 8ee7716721
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sys/arm/broadcom/bcm2835/bcm2835_fbd.c
View File

@ -113,6 +113,8 @@ bcm_fb_setup_fbd(struct bcmsc_softc *sc)
sc->info.fb_stride = fb.pitch;
sc->info.fb_width = fb.xres;
sc->info.fb_height = fb.yres;
sc->info.fb_flags = FB_FLAG_MEMATTR;
sc->info.fb_memattr = VM_MEMATTR_WRITE_COMBINING;
if (sc->fbswap) {
switch (sc->info.fb_bpp) {