From: Guoniu.Zhou <guoniu.zhou@nxp.com>
Date: Thu, 4 Jul 2019 01:19:06 +0000 (+0800)
Subject: MLK-22205-2: media: ov5640: Gate clock lane when no packet to transmit
X-Git-Tag: rel_imx_4.19.35_1.1.0~144
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=b36e13189a1c157555719ffb13cf61636e1b3604;p=linux.git

MLK-22205-2: media: ov5640: Gate clock lane when no packet to transmit

If clock lane is free running, we met MIPI CSI clock lane will enter
stop state even though sensor is transmitting data to it. In MLK-22108,
We fix the issue by calling ov5640_stop() which can force sensor lane
to LP11. We can refine the solution by setting 0x4800[5] in initialization
stage.

Signed-off-by: Guoniu.Zhou <guoniu.zhou@nxp.com>
---

diff --git a/drivers/media/platform/imx8/ov5640_mipi_v3.c b/drivers/media/platform/imx8/ov5640_mipi_v3.c
index b8fbc8ae3d33..b586232d2fd2 100644
--- a/drivers/media/platform/imx8/ov5640_mipi_v3.c
+++ b/drivers/media/platform/imx8/ov5640_mipi_v3.c
@@ -135,7 +135,6 @@ struct ov5640 {
 };
 
 static struct reg_value ov5640_init_setting_30fps_VGA[] = {
-
 	{0x3103, 0x11, 0, 0}, {0x3008, 0x82, 0, 5}, {0x3008, 0x42, 0, 0},
 	{0x3103, 0x03, 0, 0}, {0x3017, 0x00, 0, 0}, {0x3018, 0x00, 0, 0},
 	{0x3034, 0x18, 0, 0}, {0x3035, 0x14, 0, 0}, {0x3036, 0x38, 0, 0},
@@ -170,7 +169,7 @@ static struct reg_value ov5640_init_setting_30fps_VGA[] = {
 	{0x300e, 0x45, 0, 0}, {0x302e, 0x08, 0, 0}, {0x4300, 0x3F, 0, 0},
 	{0x501f, 0x00, 0, 0}, {0x4713, 0x03, 0, 0}, {0x4407, 0x04, 0, 0},
 	{0x440e, 0x00, 0, 0}, {0x460b, 0x35, 0, 0}, {0x460c, 0x22, 0, 0},
-	{0x4837, 0x0a, 0, 0}, {0x4800, 0x04, 0, 0}, {0x3824, 0x02, 0, 0},
+	{0x4837, 0x0a, 0, 0}, {0x4800, 0x24, 0, 0}, {0x3824, 0x02, 0, 0},
 	{0x5000, 0xa7, 0, 0}, {0x5001, 0xa3, 0, 0}, {0x5180, 0xff, 0, 0},
 	{0x5181, 0xf2, 0, 0}, {0x5182, 0x00, 0, 0}, {0x5183, 0x14, 0, 0},
 	{0x5184, 0x25, 0, 0}, {0x5185, 0x24, 0, 0}, {0x5186, 0x09, 0, 0},
@@ -710,7 +709,6 @@ static int ov5640_config_init(struct ov5640 *sensor)
 
 static void ov5640_start(struct ov5640 *sensor)
 {
-	ov5640_write_reg(sensor, 0x4800, 0x04);
 	ov5640_write_reg(sensor, 0x3008, 0x02);
 	ov5640_write_reg(sensor, 0x4202, 0x00);
 
@@ -745,7 +743,6 @@ static int ov5640_change_mode(struct ov5640 *sensor)
 	}
 
 	retval = ov5640_download_firmware(sensor, pModeSetting, ArySize);
-	ov5640_stop(sensor);
 
 	return retval;
 }
@@ -765,8 +762,6 @@ static int init_device(struct ov5640 *sensor)
 	if (retval < 0)
 		return retval;
 
-	ov5640_stop(sensor);
-
 	return 0;
 }