linux-kernel - [PATCH 2/4] media: aspeed: Use FIELD

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20211217095403.2618-3-jammy_huang@aspeedtech.com>
Date:   Fri, 17 Dec 2021 17:54:01 +0800
From:   Jammy Huang <jammy_huang@...eedtech.com>
To:     <eajames@...ux.ibm.com>, <mchehab@...nel.org>, <joel@....id.au>,
        <andrew@...id.au>, <linux-media@...r.kernel.org>,
        <openbmc@...ts.ozlabs.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/4] media: aspeed: Use FIELD_GET to improve readability

Use the bitfield macro FIELD_GET, and GENMASK to do the shift and mask in
one go for reg values.

Signed-off-by: Jammy Huang <jammy_huang@...eedtech.com>
---
 drivers/media/platform/aspeed-video.c | 35 ++++++++++++---------------
 1 file changed, 16 insertions(+), 19 deletions(-)

diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
index d5f77b205175..581a4261f9b7 100644
--- a/drivers/media/platform/aspeed-video.c
+++ b/drivers/media/platform/aspeed-video.c
@@ -156,26 +156,22 @@
 #define  VE_SRC_LR_EDGE_DET_NO_H	BIT(13)
 #define  VE_SRC_LR_EDGE_DET_NO_DISP	BIT(14)
 #define  VE_SRC_LR_EDGE_DET_NO_CLK	BIT(15)
-#define  VE_SRC_LR_EDGE_DET_RT_SHF	16
-#define  VE_SRC_LR_EDGE_DET_RT		GENMASK(27, VE_SRC_LR_EDGE_DET_RT_SHF)
+#define  VE_SRC_LR_EDGE_DET_RT		GENMASK(27, 16)
 #define  VE_SRC_LR_EDGE_DET_INTERLACE	BIT(31)
 
 #define VE_SRC_TB_EDGE_DET		0x094
 #define  VE_SRC_TB_EDGE_DET_TOP		GENMASK(12, 0)
-#define  VE_SRC_TB_EDGE_DET_BOT_SHF	16
-#define  VE_SRC_TB_EDGE_DET_BOT		GENMASK(28, VE_SRC_TB_EDGE_DET_BOT_SHF)
+#define  VE_SRC_TB_EDGE_DET_BOT		GENMASK(28, 16)
 
 #define VE_MODE_DETECT_STATUS		0x098
 #define  VE_MODE_DETECT_H_PERIOD	GENMASK(11, 0)
-#define  VE_MODE_DETECT_V_LINES_SHF	16
-#define  VE_MODE_DETECT_V_LINES		GENMASK(27, VE_MODE_DETECT_V_LINES_SHF)
+#define  VE_MODE_DETECT_V_LINES		GENMASK(27, 16)
 #define  VE_MODE_DETECT_STATUS_VSYNC	BIT(28)
 #define  VE_MODE_DETECT_STATUS_HSYNC	BIT(29)
 
 #define VE_SYNC_STATUS			0x09c
 #define  VE_SYNC_STATUS_HSYNC		GENMASK(11, 0)
-#define  VE_SYNC_STATUS_VSYNC_SHF	16
-#define  VE_SYNC_STATUS_VSYNC		GENMASK(27, VE_SYNC_STATUS_VSYNC_SHF)
+#define  VE_SYNC_STATUS_VSYNC		GENMASK(27, 16)
 
 #define VE_H_TOTAL_PIXELS		0x0A0
 
@@ -988,23 +984,24 @@ static void aspeed_video_get_resolution(struct aspeed_video *video)
 		sync = aspeed_video_read(video, VE_SYNC_STATUS);
 		htotal = aspeed_video_read(video, VE_H_TOTAL_PIXELS);
 
-		video->frame_bottom = (src_tb_edge & VE_SRC_TB_EDGE_DET_BOT) >>
-			VE_SRC_TB_EDGE_DET_BOT_SHF;
-		video->frame_top = src_tb_edge & VE_SRC_TB_EDGE_DET_TOP;
+		video->frame_bottom = FIELD_GET(VE_SRC_TB_EDGE_DET_BOT,
+						src_tb_edge);
+		video->frame_top = FIELD_GET(VE_SRC_TB_EDGE_DET_TOP,
+					     src_tb_edge);
 		det->vfrontporch = video->frame_top;
-		det->vbackporch = ((mds & VE_MODE_DETECT_V_LINES) >>
-			VE_MODE_DETECT_V_LINES_SHF) - video->frame_bottom;
-		det->vsync = (sync & VE_SYNC_STATUS_VSYNC) >>
-			VE_SYNC_STATUS_VSYNC_SHF;
+		det->vbackporch = FIELD_GET(VE_MODE_DETECT_V_LINES, mds) -
+			video->frame_bottom;
+		det->vsync = FIELD_GET(VE_SYNC_STATUS_VSYNC, sync);
 		if (video->frame_top > video->frame_bottom)
 			continue;
 
-		video->frame_right = (src_lr_edge & VE_SRC_LR_EDGE_DET_RT) >>
-			VE_SRC_LR_EDGE_DET_RT_SHF;
-		video->frame_left = src_lr_edge & VE_SRC_LR_EDGE_DET_LEFT;
+		video->frame_right = FIELD_GET(VE_SRC_LR_EDGE_DET_RT,
+					       src_lr_edge);
+		video->frame_left = FIELD_GET(VE_SRC_LR_EDGE_DET_LEFT,
+					      src_lr_edge);
 		det->hfrontporch = video->frame_left;
 		det->hbackporch = htotal - video->frame_right;
-		det->hsync = sync & VE_SYNC_STATUS_HSYNC;
+		det->hsync = FIELD_GET(VE_SYNC_STATUS_HSYNC, sync);
 		if (video->frame_left > video->frame_right)
 			continue;
 
-- 
2.25.1