From: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
Date: Mon, 18 Sep 2017 22:47:43 +0000 (-0300)
Subject: [media] media: ov13858: Fix 4224x3136 video flickering at some vblanks
X-Git-Tag: rel_imx_4.19.35_1.1.0~11105^2~274
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=58020c9f14c8d884fd48434fbdbc659257cf46f3;p=linux.git

[media] media: ov13858: Fix 4224x3136 video flickering at some vblanks

Previously, with crop (0, 0), (4255, 3167), VTS < 0xC9E was resulting in
blank frames sometimes. This appeared as video flickering. But we need VTS
< 0xC9E to get ~30fps.

Omni Vision recommends to use crop (0,8), (4255, 3159) for 4224x3136. With
this crop, VTS 0xC8E is supported and yields ~30fps.

Signed-off-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---

diff --git a/drivers/media/i2c/ov13858.c b/drivers/media/i2c/ov13858.c
index 4e331b401a71..2bd659976c30 100644
--- a/drivers/media/i2c/ov13858.c
+++ b/drivers/media/i2c/ov13858.c
@@ -237,11 +237,11 @@ static const struct ov13858_reg mode_4224x3136_regs[] = {
 	{0x3800, 0x00},
 	{0x3801, 0x00},
 	{0x3802, 0x00},
-	{0x3803, 0x00},
+	{0x3803, 0x08},
 	{0x3804, 0x10},
 	{0x3805, 0x9f},
 	{0x3806, 0x0c},
-	{0x3807, 0x5f},
+	{0x3807, 0x57},
 	{0x3808, 0x10},
 	{0x3809, 0x80},
 	{0x380a, 0x0c},