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From: Oleksandr Tymoshenko <gonzo@FreeBSD.org>
Date: Sat, 1 Oct 2016 17:57:32 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r306557 - head/sys/arm/broadcom/bcm2835
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Author: gonzo
Date: Sat Oct  1 17:57:32 2016
New Revision: 306557
URL: https://svnweb.freebsd.org/changeset/base/306557

Log:
  Use VM_MEMATTR_WRITE_COMBINING memattr for mmap(2) on framebuffer
  
  VM_MEMATTR_WRITE_COMBINING sets write-through cache flag for framebuffer
  memory that prevents pixel data from being stuck in cache until evicition
  happens

Modified:
  head/sys/arm/broadcom/bcm2835/bcm2835_fbd.c

Modified: head/sys/arm/broadcom/bcm2835/bcm2835_fbd.c
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_fbd.c	Sat Oct  1 17:48:41 2016	(r306556)
+++ head/sys/arm/broadcom/bcm2835/bcm2835_fbd.c	Sat Oct  1 17:57:32 2016	(r306557)
@@ -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) {