Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933671AbbHJKNA (ORCPT ); Mon, 10 Aug 2015 06:13:00 -0400 Received: from mail-pa0-f53.google.com ([209.85.220.53]:36180 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932859AbbHJKM4 convert rfc822-to-8bit (ORCPT ); Mon, 10 Aug 2015 06:12:56 -0400 From: yalin wang Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT Subject: [RFC] fbdev/riva:change to use generice function to implement reverse_order() Message-Id: Date: Mon, 10 Aug 2015 18:12:50 +0800 To: adaplas@gmail.com, plagnioj@jcrosoft.com, tomi.valkeinen@ti.com, linux-fbdev@vger.kernel.org, open list Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) X-Mailer: Apple Mail (2.2098) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2304 Lines: 81 This change to use swab32(bitrev32()) to implement reverse_order() function, have better performance on some platforms. Signed-off-by: yalin wang --- drivers/video/fbdev/riva/fbdev.c | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-) diff --git a/drivers/video/fbdev/riva/fbdev.c b/drivers/video/fbdev/riva/fbdev.c index f1ad274..4803901 100644 --- a/drivers/video/fbdev/riva/fbdev.c +++ b/drivers/video/fbdev/riva/fbdev.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #ifdef CONFIG_PMAC_BACKLIGHT #include @@ -84,6 +85,7 @@ #define SetBit(n) (1<<(n)) #define Set8Bits(value) ((value)&0xff) +#define reverse_order(v) swab32(bitrev32(v)) /* HW cursor parameters */ #define MAX_CURS 32 @@ -451,15 +453,6 @@ static inline unsigned char MISCin(struct riva_par *par) return (VGA_RD08(par->riva.PVIO, 0x3cc)); } -static inline void reverse_order(u32 *l) -{ - u8 *a = (u8 *)l; - a[0] = bitrev8(a[0]); - a[1] = bitrev8(a[1]); - a[2] = bitrev8(a[2]); - a[3] = bitrev8(a[3]); -} - /* ------------------------------------------------------------------------- * * * cursor stuff @@ -497,8 +490,8 @@ static void rivafb_load_cursor_image(struct riva_par *par, u8 *data8, for (i = 0; i < h; i++) { b = *data++; - reverse_order(&b); - + b = reverse_order(b); + for (j = 0; j < w/2; j++) { tmp = 0; #if defined (__BIG_ENDIAN) @@ -1545,7 +1538,7 @@ static void rivafb_imageblit(struct fb_info *info, for (i = 0; i < 16; i++) { tmp = *((u32 *)cdat); cdat = (u8 *)((u32 *)cdat + 1); - reverse_order(&tmp); + tmp = reverse_order(tmp); NV_WR32(d, i*4, tmp); } size -= 16; @@ -1555,7 +1548,7 @@ static void rivafb_imageblit(struct fb_info *info, for (i = 0; i < size; i++) { tmp = *((u32 *) cdat); cdat = (u8 *)((u32 *)cdat + 1); - reverse_order(&tmp); + tmp = reverse_order(tmp); NV_WR32(d, i*4, tmp); } } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/