[PATCH v3 5/8] media: rcar-vin: Handle data-enable polarity

Jacopo Mondi
2018-05-29T15:05:56Z

Handle data-enable signal polarity. If the polarity is not specifically
requested to be active low, use the active high default.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
v3:
- use new property to set the CES bit
---
drivers/media/platform/rcar-vin/rcar-dma.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index d2b7002..9145b56 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -123,6 +123,7 @@
/* Video n Data Mode Register 2 bits */
#define VNDMR2_VPS (1 << 30)
#define VNDMR2_HPS (1 << 29)
+#define VNDMR2_CES (1 << 28)
#define VNDMR2_FTEV (1 << 17)
#define VNDMR2_VLV(n) ((n & 0xf) << 12)

@@ -698,6 +699,10 @@ static int rvin_setup(struct rvin_dev *vin)
/* Vsync Signal Polarity Select */
if (!(vin->parallel->mbus_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW))
dmr2 |= VNDMR2_VPS;
+
+ /* Data Enable Polarity Select */
+ if (vin->parallel->mbus_flags & V4L2_MBUS_DATA_ENABLE_LOW)
+ dmr2 |= VNDMR2_CES;
}

/*
--
2.7.4