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From: Ondrej Jirman <megous@megous.com>
To: linux-sunxi@googlegroups.com
Cc: Ondrej Jirman <megous@megous.com>,
	Yong Deng <yong.deng@magewell.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	linux-media@vger.kernel.org (open list:CSI DRIVERS FOR ALLWINNER
	V3s),
	linux-arm-kernel@lists.infradead.org (moderated
	list:ARM/Allwinner sunXi SoC support),
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] media: sun6i-csi: Fix incorrect HSYNC/VSYNC/PCLK polarity configuration
Date: Thu, 28 Nov 2019 03:02:59 +0100
Message-ID: <20191128020259.1338188-1-megous@megous.com> (raw)

This was discovered by writing a new camera driver and wondering, why
hsync/vsync polarity setting behaves in reverse to what would be
expected. Verified by looking at the actual signals and the SoC
user manual.

Fixes: 5cc7522d8965 ("media: sun6i: Add support for Allwinner CSI V3s")
Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
index f17e5550602d..98bbcca59a90 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
@@ -417,12 +417,12 @@ static void sun6i_csi_setup_bus(struct sun6i_csi_dev *sdev)
 		if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
 			cfg |= CSI_IF_CFG_FIELD_POSITIVE;
 
-		if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+		if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
 			cfg |= CSI_IF_CFG_VREF_POL_POSITIVE;
-		if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+		if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
 			cfg |= CSI_IF_CFG_HREF_POL_POSITIVE;
 
-		if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+		if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
 			cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE;
 		break;
 	case V4L2_MBUS_BT656:
-- 
2.24.0


             reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-28  2:02 Ondrej Jirman [this message]
2019-11-28  2:26 ` [linux-sunxi] " Yong
2019-11-28  3:06   ` Ondřej Jirman
2019-11-28  3:26     ` Chen-Yu Tsai
2019-11-28  3:50       ` Ondřej Jirman
2019-11-28  4:14         ` Chen-Yu Tsai

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