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media: rcar-csi2: Update D-PHY startup on V4M

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The latest datasheet (Rev.0.70) updates the D-PHY start-up sequence for
D-PHY operation. Unfortunately the datasheet do not add any additional
documentation on the magic values.

This have been tested together with the MAX96724 available on the single
board test platform and it works as expected.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Niklas Söderlund 2024-12-10 16:54:00 +01:00 committed by Mauro Carvalho Chehab
parent feaf4154d6
commit f6470be571
1 changed files with 11 additions and 6 deletions
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17
drivers/media/platform/renesas/rcar-csi2.c
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@ -1406,15 +1406,15 @@ static int rcsi2_init_common_v4m(struct rcar_csi2 *priv, unsigned int mbps)
static const struct phtw_value step2[] = {
{ .data = 0x00, .code = 0x00 },
{ .data = 0x80, .code = 0xe0 },
{ .data = 0x01, .code = 0xe1 },
{ .data = 0x31, .code = 0xe1 },
{ .data = 0x06, .code = 0x00 },
{ .data = 0x0f, .code = 0x11 },
{ .data = 0x11, .code = 0x11 },
{ .data = 0x08, .code = 0x00 },
{ .data = 0x0f, .code = 0x11 },
{ .data = 0x11, .code = 0x11 },
{ .data = 0x0a, .code = 0x00 },
{ .data = 0x0f, .code = 0x11 },
{ .data = 0x11, .code = 0x11 },
{ .data = 0x0c, .code = 0x00 },
{ .data = 0x0f, .code = 0x11 },
{ .data = 0x11, .code = 0x11 },
{ .data = 0x01, .code = 0x00 },
{ .data = 0x31, .code = 0xaa },
{ .data = 0x05, .code = 0x00 },
@ -1427,6 +1427,11 @@ static int rcsi2_init_common_v4m(struct rcar_csi2 *priv, unsigned int mbps)
{ .data = 0x05, .code = 0x09 },
};
static const struct phtw_value step3[] = {
{ .data = 0x01, .code = 0x00 },
{ .data = 0x06, .code = 0xab },
};
if (priv->info->hsfreqrange) {
ret = rcsi2_set_phypll(priv, mbps);
if (ret)
@ -1457,7 +1462,7 @@ static int rcsi2_init_common_v4m(struct rcar_csi2 *priv, unsigned int mbps)
return ret;
}
return ret;
return rcsi2_phtw_write_array(priv, step3, ARRAY_SIZE(step3));
}
static int rcsi2_start_receiver_v4m(struct rcar_csi2 *priv,