linux-kernel - [PATCH 4/10] atyfb: set FBINFO_READS

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Message-ID: <alpine.LRH.2.02.1401231305390.31739@file01.intranet.prod.int.rdu2.redhat.com>
Date:	Thu, 23 Jan 2014 13:18:56 -0500 (EST)
From:	Mikulas Patocka <mpatocka@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 4/10] atyfb: set FBINFO_READS_FAST

Set FBINFO_READS_FAST so that the console code uses scrolling instead of
rewriting. This improves scrolling speed.

A time to do ls -la /usr/bin:
	original patched
32bpp	4.9	3.6
24bpp	4.9	2.9
16bpp	4.9	2.1
8bpp	4.9	1.7

Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>

---
 drivers/video/aty/atyfb_base.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-3.13-rc1/drivers/video/aty/atyfb_base.c
===================================================================
--- linux-3.13-rc1.orig/drivers/video/aty/atyfb_base.c	2013-11-27 00:25:42.000000000 +0100
+++ linux-3.13-rc1/drivers/video/aty/atyfb_base.c	2013-11-27 00:25:55.000000000 +0100
@@ -2653,7 +2653,8 @@ static int aty_init(struct fb_info *info
 		      FBINFO_HWACCEL_IMAGEBLIT |
 		      FBINFO_HWACCEL_FILLRECT  |
 		      FBINFO_HWACCEL_COPYAREA  |
-		      FBINFO_HWACCEL_YPAN;
+		      FBINFO_HWACCEL_YPAN      |
+		      FBINFO_READS_FAST;
 
 #ifdef CONFIG_PMAC_BACKLIGHT
 	if (M64_HAS(G3_PB_1_1) && of_machine_is_compatible("PowerBook1,1")) {

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