From 2d19a2c1186d86e38b51ef59e4b9678f8ad7acf4 Mon Sep 17 00:00:00 2001
From: Jean-Francois Moine <moinejf@free.fr>
Date: Thu, 12 Nov 2009 16:15:44 -0300
Subject: [PATCH] V4L/DVB (13449): gspca - ov534: The AWB control works only
 when autogain is set.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---
 drivers/media/video/gspca/ov534.c | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/drivers/media/video/gspca/ov534.c b/drivers/media/video/gspca/ov534.c
index f2f844af54c0..26d98b1312e0 100644
--- a/drivers/media/video/gspca/ov534.c
+++ b/drivers/media/video/gspca/ov534.c
@@ -101,7 +101,7 @@ static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
 
 static struct ctrl sd_ctrls_ov772x[] = {
-    {
+    {							/* 0 */
 	{
 		.id      = V4L2_CID_BRIGHTNESS,
 		.type    = V4L2_CTRL_TYPE_INTEGER,
@@ -115,7 +115,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setbrightness,
 	.get = sd_getbrightness,
     },
-    {
+    {							/* 1 */
 	{
 		.id      = V4L2_CID_CONTRAST,
 		.type    = V4L2_CTRL_TYPE_INTEGER,
@@ -129,7 +129,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setcontrast,
 	.get = sd_getcontrast,
     },
-    {
+    {							/* 2 */
 	{
 	    .id      = V4L2_CID_GAIN,
 	    .type    = V4L2_CTRL_TYPE_INTEGER,
@@ -143,7 +143,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setgain,
 	.get = sd_getgain,
     },
-    {
+    {							/* 3 */
 	{
 	    .id      = V4L2_CID_EXPOSURE,
 	    .type    = V4L2_CTRL_TYPE_INTEGER,
@@ -157,7 +157,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setexposure,
 	.get = sd_getexposure,
     },
-    {
+    {							/* 4 */
 	{
 	    .id      = V4L2_CID_RED_BALANCE,
 	    .type    = V4L2_CTRL_TYPE_INTEGER,
@@ -171,7 +171,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setredblc,
 	.get = sd_getredblc,
     },
-    {
+    {							/* 5 */
 	{
 	    .id      = V4L2_CID_BLUE_BALANCE,
 	    .type    = V4L2_CTRL_TYPE_INTEGER,
@@ -185,7 +185,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setblueblc,
 	.get = sd_getblueblc,
     },
-    {
+    {							/* 6 */
 	{
 		.id      = V4L2_CID_HUE,
 		.type    = V4L2_CTRL_TYPE_INTEGER,
@@ -199,7 +199,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_sethue,
 	.get = sd_gethue,
     },
-    {
+    {							/* 7 */
 	{
 	    .id      = V4L2_CID_AUTOGAIN,
 	    .type    = V4L2_CTRL_TYPE_BOOLEAN,
@@ -213,7 +213,8 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setautogain,
 	.get = sd_getautogain,
     },
-    {
+#define AWB_IDX 8
+    {							/* 8 */
 	{
 		.id      = V4L2_CID_AUTO_WHITE_BALANCE,
 		.type    = V4L2_CTRL_TYPE_BOOLEAN,
@@ -227,7 +228,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setawb,
 	.get = sd_getawb,
     },
-    {
+    {							/* 9 */
 	{
 	    .id      = V4L2_CID_SHARPNESS,
 	    .type    = V4L2_CTRL_TYPE_INTEGER,
@@ -241,7 +242,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_setsharpness,
 	.get = sd_getsharpness,
     },
-    {
+    {							/* 10 */
 	{
 	    .id      = V4L2_CID_HFLIP,
 	    .type    = V4L2_CTRL_TYPE_BOOLEAN,
@@ -255,7 +256,7 @@ static struct ctrl sd_ctrls_ov772x[] = {
 	.set = sd_sethflip,
 	.get = sd_gethflip,
     },
-    {
+    {							/* 11 */
 	{
 	    .id      = V4L2_CID_VFLIP,
 	    .type    = V4L2_CTRL_TYPE_BOOLEAN,
@@ -1237,6 +1238,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	sd->hue = HUE_DEF;
 #if AUTOGAIN_DEF != 0
 	sd->autogain = AUTOGAIN_DEF;
+#else
+	gspca_dev->ctrl_inac |= (1 << AWB_IDX);
 #endif
 #if AWB_DEF != 0
 	sd->awb = AWB_DEF
@@ -1606,6 +1609,13 @@ static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val)
 	struct sd *sd = (struct sd *) gspca_dev;
 
 	sd->autogain = val;
+
+	/* the auto white balance control works only when auto gain is set */
+	if (val)
+		gspca_dev->ctrl_inac &= ~(1 << AWB_IDX);
+	else
+		gspca_dev->ctrl_inac |= (1 << AWB_IDX);
+
 	if (gspca_dev->streaming)
 		setautogain(gspca_dev);
 	return 0;
-- 
2.11.0