[PATCH] media: i2c: ov5645: Fix CSI-2 CRC errors on RK3576 after init sequence

[Xiaolei Wang]

On the RK3576 platform, after ov5645_global_init_setting completes and
before stream on, the CSI host reports a high rate of CRC errors:

  MIPI_CSI2 ERR1:0x1000000 (crc,vc: 0)

These errors occur exclusively in the window between init completion and
stream on. Once preview starts and the sensor outputs valid HS data, no
further CRC errors are observed.

Commit 092e8eb90a7d ("media: i2c: ov5645: Fix power sequence") reworked
the power sequence to properly enter LP-11 during power-up. As part of
this change, the SYSTEM_CTRL0_STOP (0x42) write in s_power() was replaced
with usleep_range(500, 1000), leaving the sensor in wake state (0x3008 =
0x02) from init through to s_stream. Reverting this commit resolves the
CRC errors, confirming it as the triggering change.

Restore the power-down state after init by appending { 0x3008, 0x42 } to
the end of ov5645_global_init_setting[]. This powers down the sensor core
after MIPI configuration is complete, while keeping the MIPI PHY active in
LP-11. The sensor is then woken up only at s_stream time.

This preserves all LP-11 compliance improvements from
commit 092e8eb90a7d ("media: i2c: ov5645: Fix power sequence") while
eliminating the CRC errors on RK3576.

Fixes: 092e8eb90a7d ("media: i2c: ov5645: Fix power sequence")
Signed-off-by: Xiaolei Wang <xiaoleiwangxiaolei@xxxxxxxxx>
---
 drivers/media/i2c/ov5645.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
index c772ef6e51d2..be85e0155b81 100644
--- a/drivers/media/i2c/ov5645.c
+++ b/drivers/media/i2c/ov5645.c
@@ -351,7 +351,8 @@ static const struct reg_value ov5645_global_init_setting[] = {
 	{ 0x3008, 0x02 },
 	{ OV5645_IO_MIPI_CTRL00, 0x40 },
 	{ OV5645_MIPI_CTRL00, 0x24 },
-	{ OV5645_PAD_OUTPUT00, 0x70 }
+	{ OV5645_PAD_OUTPUT00, 0x70 },
+	{ 0x3008, 0x42 }
 };
 
 static const struct reg_value ov5645_setting_sxga[] = {
-- 
2.34.1