Date: Thu, 4 Sep 2014 19:22:01 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r271121 - stable/10/sys/dev/vt/hw/vga Message-ID: <201409041922.s84JM1kX001950@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: emaste Date: Thu Sep 4 19:22:01 2014 New Revision: 271121 URL: http://svnweb.freebsd.org/changeset/base/271121 Log: MFC r270299 (dumbbell): vt_vga: When clearing video memory, don't read from it The goal is to clear the video memory, in case an application drew to it. So the content shouldn't be loaded in the latches, it can't be trusted anyway. This improves a bit the window switch speed. Sponsored by: The FreeBSD Foundation Modified: stable/10/sys/dev/vt/hw/vga/vt_vga.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/vt/hw/vga/vt_vga.c ============================================================================== --- stable/10/sys/dev/vt/hw/vga/vt_vga.c Thu Sep 4 19:13:07 2014 (r271120) +++ stable/10/sys/dev/vt/hw/vga/vt_vga.c Thu Sep 4 19:22:01 2014 (r271121) @@ -609,7 +609,6 @@ vga_initialize(struct vt_device *vd, int * planes. */ for (ofs = 0; ofs < VT_VGA_MEMSIZE; ofs++) { - MEM_READ1(sc, ofs); MEM_WRITE1(sc, ofs, 0); } }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201409041922.s84JM1kX001950>