openwrt/target/linux/bcm27xx/patches-5.4/950-0825-media-i2c-imx290-Move-the-settle-time-delay-out-of-l.patch

From d2155366275ce70438d12169a59959e90b637f9c Mon Sep 17 00:00:00 2001
From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Date: Fri, 12 Jun 2020 15:53:54 +0200
Subject: [PATCH] media: i2c: imx290: Move the settle time delay out
 of loop

Commit 6544af9b04b4484867c234ba0be1b5008e4a14ee upstream.

The 10ms settle time is needed only at the end of all consecutive
register writes. So move the delay to outside of the for loop of
imx290_set_register_array().

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/i2c/imx290.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/media/i2c/imx290.c
+++ b/drivers/media/i2c/imx290.c
@@ -404,11 +404,11 @@ static int imx290_set_register_array(str
 		ret = imx290_write_reg(imx290, settings->reg, settings->val);
 		if (ret < 0)
 			return ret;
-
-		/* Settle time is 10ms for all registers */
-		msleep(10);
 	}
 
+	/* Provide 10ms settle time */
+	msleep(10);
+
 	return 0;
 }