V4L/DVB: gspca - zc3xx.c: Remove the brightness control

Brightness is done by the gamma tables and not by single bridge registers.
It will be back as soon as an algorithm will be found.

This change also fixes the autogain problem found by Jose Alberto Reguero
(webcam 046d:08dd).
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/zc3xx.c

@@ -40,7 +40,6 @@ static int force_sensor = -1;
 struct sd {
 	struct gspca_dev gspca_dev;	/* !! must be the first item */
 
-	u8 brightness;
 	u8 contrast;
 	u8 gamma;
 	u8 autogain;
@@ -80,8 +79,6 @@ struct sd {
 };
 
 /* V4L2 controls supported by the driver */
-static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
-static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
 static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
@@ -94,21 +91,6 @@ static int sd_setsharpness(struct gspca_dev *gspca_dev, __s32 val);
 static int sd_getsharpness(struct gspca_dev *gspca_dev, __s32 *val);
 
 static const struct ctrl sd_ctrls[] = {
-#define BRIGHTNESS_IDX 0
-	{
-	    {
-		.id      = V4L2_CID_BRIGHTNESS,
-		.type    = V4L2_CTRL_TYPE_INTEGER,
-		.name    = "Brightness",
-		.minimum = 0,
-		.maximum = 255,
-		.step    = 1,
-#define BRIGHTNESS_DEF 128
-		.default_value = BRIGHTNESS_DEF,
-	    },
-	    .set = sd_setbrightness,
-	    .get = sd_getbrightness,
-	},
 	{
 	    {
 		.id      = V4L2_CID_CONTRAST,
@@ -150,7 +132,7 @@ static const struct ctrl sd_ctrls[] = {
 	    .set = sd_setautogain,
 	    .get = sd_getautogain,
 	},
-#define LIGHTFREQ_IDX 4
+#define LIGHTFREQ_IDX 3
 	{
 	    {
 		.id	 = V4L2_CID_POWER_LINE_FREQUENCY,
@@ -6004,33 +5986,6 @@ static void setmatrix(struct gspca_dev *gspca_dev)
 		reg_w(gspca_dev->dev, matrix[i], 0x010a + i);
 }
 
-static void setbrightness(struct gspca_dev *gspca_dev)
-{
-	struct sd *sd = (struct sd *) gspca_dev;
-	u8 brightness;
-
-	switch (sd->sensor) {
-	case SENSOR_GC0305:
-	case SENSOR_OV7620:
-	case SENSOR_PAS202B:
-	case SENSOR_PO2030:
-		return;
-	}
-/*fixme: is it really write to 011d and 018d for all other sensors? */
-	brightness = sd->brightness;
-	reg_w(gspca_dev->dev, brightness, 0x011d);
-	switch (sd->sensor) {
-	case SENSOR_ADCM2700:
-	case SENSOR_HV7131B:
-		return;
-	}
-	if (brightness < 0x70)
-		brightness += 0x10;
-	else
-		brightness = 0x80;
-	reg_w(gspca_dev->dev, brightness, 0x018d);
-}
-
 static void setsharpness(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
@@ -6789,7 +6744,6 @@ static int sd_config(struct gspca_dev *gspca_dev,
 		cam->nmodes = ARRAY_SIZE(broken_vga_mode);
 		break;
 	}
-	sd->brightness = BRIGHTNESS_DEF;
 	sd->contrast = CONTRAST_DEF;
 	sd->gamma = gamma[sd->sensor];
 	sd->autogain = AUTOGAIN_DEF;
@@ -6797,12 +6751,6 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	sd->quality = QUALITY_DEF;
 
 	switch (sd->sensor) {
-	case SENSOR_GC0305:
-	case SENSOR_OV7620:
-	case SENSOR_PAS202B:
-	case SENSOR_PO2030:
-		gspca_dev->ctrl_dis = (1 << BRIGHTNESS_IDX);
-		break;
 	case SENSOR_HV7131B:
 	case SENSOR_HV7131C:
 	case SENSOR_OV7630C:
@@ -6893,7 +6841,6 @@ static int sd_start(struct gspca_dev *gspca_dev)
 	}
 
 	setmatrix(gspca_dev);
-	setbrightness(gspca_dev);
 	switch (sd->sensor) {
 	case SENSOR_ADCM2700:
 	case SENSOR_OV7620:
@@ -7015,24 +6962,6 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 	gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
 }
 
-static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
-{
-	struct sd *sd = (struct sd *) gspca_dev;
-
-	sd->brightness = val;
-	if (gspca_dev->streaming)
-		setbrightness(gspca_dev);
-	return 0;
-}
-
-static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
-{
-	struct sd *sd = (struct sd *) gspca_dev;
-
-	*val = sd->brightness;
-	return 0;
-}
-
 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
 {
 	struct sd *sd = (struct sd *) gspca_dev;