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media: rcar-csi2: Propagate the FLD signal for NTSC and PAL

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Depending on which video standard is used the driver needs to setup the
hardware to correctly handle fields. If stream is identified as NTSC
or PAL setup field detection and propagate the field detection signal.

Later versions of the datasheet have been updated to make it clear
that FLD register should be set to 0 when dealing with non-interlaced
field formats.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Niklas Söderlund 2019-04-11 16:34:44 -04:00 committed by Mauro Carvalho Chehab
parent 4ab44ff084
commit 9f7983bdc4
1 changed files with 13 additions and 3 deletions
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16
drivers/media/platform/rcar-vin/rcar-csi2.c
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@ -68,6 +68,7 @@ struct rcar_csi2;
/* Field Detection Control */
#define FLD_REG 0x1c
#define FLD_FLD_NUM(n) (((n) & 0xff) << 16)
#define FLD_DET_SEL(n) (((n) & 0x3) << 4)
#define FLD_FLD_EN4 BIT(3)
#define FLD_FLD_EN3 BIT(2)
#define FLD_FLD_EN2 BIT(1)
@ -478,7 +479,7 @@ static int rcsi2_calc_mbps(struct rcar_csi2 *priv, unsigned int bpp)
static int rcsi2_start_receiver(struct rcar_csi2 *priv)
{
const struct rcar_csi2_format *format;
u32 phycnt, vcdt = 0, vcdt2 = 0;
u32 phycnt, vcdt = 0, vcdt2 = 0, fld = 0;
unsigned int i;
int mbps, ret;
@ -510,6 +511,16 @@ static int rcsi2_start_receiver(struct rcar_csi2 *priv)
vcdt2 |= vcdt_part << ((i % 2) * 16);
}
if (priv->mf.field == V4L2_FIELD_ALTERNATE) {
fld = FLD_DET_SEL(1) | FLD_FLD_EN4 | FLD_FLD_EN3 | FLD_FLD_EN2
| FLD_FLD_EN;
if (priv->mf.height == 240)
fld |= FLD_FLD_NUM(0);
else
fld |= FLD_FLD_NUM(1);
}
phycnt = PHYCNT_ENABLECLK;
phycnt |= (1 << priv->lanes) - 1;
@ -556,8 +567,7 @@ static int rcsi2_start_receiver(struct rcar_csi2 *priv)
rcsi2_write(priv, PHYCNT_REG, phycnt);
rcsi2_write(priv, LINKCNT_REG, LINKCNT_MONITOR_EN |
LINKCNT_REG_MONI_PACT_EN | LINKCNT_ICLK_NONSTOP);
rcsi2_write(priv, FLD_REG, FLD_FLD_NUM(2) | FLD_FLD_EN4 |
FLD_FLD_EN3 | FLD_FLD_EN2 | FLD_FLD_EN);
rcsi2_write(priv, FLD_REG, fld);
rcsi2_write(priv, PHYCNT_REG, phycnt | PHYCNT_SHUTDOWNZ);
rcsi2_write(priv, PHYCNT_REG, phycnt | PHYCNT_SHUTDOWNZ | PHYCNT_RSTZ);