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V4L/DVB (8348): gspca: Add auto gain/exposure to sonixb and tas5110 / ov6650 sensors.

Browse source 
sonixb:   Do auto gain for tas5110 / ov6650 sensors.
pac207:   Move the auto_gain function to gspca.
gspca:    New function gspca_auto_gain_n_exposure().

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans de Goede 2008-07-10 10:40:53 -03:00 committed by Mauro Carvalho Chehab
parent d0d0e39bc5
commit dcef3237b6
4 changed files with 350 additions and 109 deletions
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88
drivers/media/video/gspca/gspca.c
View file

@ -1790,6 +1790,94 @@ void gspca_disconnect(struct usb_interface *intf)
}
EXPORT_SYMBOL(gspca_disconnect);
/* -- cam driver utility functions -- */
/* auto gain and exposure algorithm based on the knee algorithm described here:
http://ytse.tricolour.net/docs/LowLightOptimization.html
Returns 0 if no changes were made, 1 if the gain and or exposure settings
where changed. */
int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
{
int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
const struct ctrl *gain_ctrl = NULL;
const struct ctrl *exposure_ctrl = NULL;
const struct ctrl *autogain_ctrl = NULL;
int retval = 0;
for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
}
if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
"on cam without (auto)gain/exposure");
return 0;
}
if (gain_ctrl->get(gspca_dev, &gain) ||
exposure_ctrl->get(gspca_dev, &exposure) ||
autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
return 0;
orig_gain = gain;
orig_exposure = exposure;
/* If we are of a multiple of deadzone, do multiple steps to reach the
desired lumination fast (with the risc of a slight overshoot) */
steps = abs(desired_avg_lum - avg_lum) / deadzone;
PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d\n",
avg_lum, desired_avg_lum, steps);
for (i = 0; i < steps; i++) {
if (avg_lum > desired_avg_lum) {
if (gain > gain_knee)
gain--;
else if (exposure > exposure_knee)
exposure--;
else if (gain > gain_ctrl->qctrl.default_value)
gain--;
else if (exposure > exposure_ctrl->qctrl.minimum)
exposure--;
else if (gain > gain_ctrl->qctrl.minimum)
gain--;
else
break;
} else {
if (gain < gain_ctrl->qctrl.default_value)
gain++;
else if (exposure < exposure_knee)
exposure++;
else if (gain < gain_knee)
gain++;
else if (exposure < exposure_ctrl->qctrl.maximum)
exposure++;
else if (gain < gain_ctrl->qctrl.maximum)
gain++;
else
break;
}
}
if (gain != orig_gain) {
gain_ctrl->set(gspca_dev, gain);
retval = 1;
}
if (exposure != orig_exposure) {
exposure_ctrl->set(gspca_dev, exposure);
retval = 1;
}
return retval;
}
EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
/* -- module insert / remove -- */
static int __init gspca_init(void)
{

2
drivers/media/video/gspca/gspca.h
View file

@ -170,4 +170,6 @@ struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
struct gspca_frame *frame,
const __u8 *data,
int len);
int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
#endif /* GSPCAV2_H */

68
drivers/media/video/gspca/pac207.c
View file

@ -357,70 +357,20 @@ static void sd_close(struct gspca_dev *gspca_dev)
{
}
/* auto gain and exposure algorithm based on the knee algorithm described here:
* <http://ytse.tricolour.net/docs/LowLightOptimization.html> */
static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int i, steps, desired_avg_lum;
int orig_gain = sd->gain;
int orig_exposure = sd->exposure;
int avg_lum = atomic_read(&sd->avg_lum);
if (!sd->autogain || avg_lum == -1)
if (avg_lum == -1)
return;
if (sd->autogain_ignore_frames > 0) {
if (sd->autogain_ignore_frames > 0)
sd->autogain_ignore_frames--;
return;
}
/* correct desired lumination for the configured brightness */
desired_avg_lum = 100 + sd->brightness / 2;
/* If we are of a multiple of deadzone, do multiple step to reach the
desired lumination fast (with the risc of a slight overshoot) */
steps = abs(desired_avg_lum - avg_lum) / PAC207_AUTOGAIN_DEADZONE;
for (i = 0; i < steps; i++) {
if (avg_lum > desired_avg_lum) {
if (sd->gain > PAC207_GAIN_KNEE)
sd->gain--;
else if (sd->exposure > PAC207_EXPOSURE_KNEE)
sd->exposure--;
else if (sd->gain > PAC207_GAIN_DEFAULT)
sd->gain--;
else if (sd->exposure > PAC207_EXPOSURE_MIN)
sd->exposure--;
else if (sd->gain > PAC207_GAIN_MIN)
sd->gain--;
else
break;
} else {
if (sd->gain < PAC207_GAIN_DEFAULT)
sd->gain++;
else if (sd->exposure < PAC207_EXPOSURE_KNEE)
sd->exposure++;
else if (sd->gain < PAC207_GAIN_KNEE)
sd->gain++;
else if (sd->exposure < PAC207_EXPOSURE_MAX)
sd->exposure++;
else if (sd->gain < PAC207_GAIN_MAX)
sd->gain++;
else
break;
}
}
if (sd->exposure != orig_exposure || sd->gain != orig_gain) {
if (sd->exposure != orig_exposure)
pac207_write_reg(gspca_dev, 0x0002, sd->exposure);
if (sd->gain != orig_gain)
pac207_write_reg(gspca_dev, 0x000e, sd->gain);
pac207_write_reg(gspca_dev, 0x13, 0x01); /* load reg to sen */
pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
else if (gspca_auto_gain_n_exposure(gspca_dev, avg_lum,
100 + sd->brightness / 2, PAC207_AUTOGAIN_DEADZONE,
PAC207_GAIN_KNEE, PAC207_EXPOSURE_KNEE))
sd->autogain_ignore_frames = PAC207_AUTOGAIN_IGNORE_FRAMES;
}
}
static unsigned char *pac207_find_sof(struct gspca_dev *gspca_dev,
@ -546,10 +496,6 @@ static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
/* don't allow mucking with exposure when using autogain */
if (sd->autogain)
return -EINVAL;
sd->exposure = val;
if (gspca_dev->streaming)
setexposure(gspca_dev);
@ -568,10 +514,6 @@ static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
/* don't allow mucking with gain when using autogain */
if (sd->autogain)
return -EINVAL;
sd->gain = val;
if (gspca_dev->streaming)
setgain(gspca_dev);

301
drivers/media/video/gspca/sonixb.c
View file

@ -35,11 +35,19 @@ MODULE_LICENSE("GPL");
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
struct sd_desc sd_desc; /* our nctrls differ dependend upon the
sensor, so we use a per cam copy */
atomic_t avg_lum;
unsigned short gain;
unsigned short exposure;
unsigned char brightness;
unsigned char contrast;
unsigned char autogain;
unsigned char autogain_ignore_frames;
unsigned char fr_h_sz; /* size of frame header */
char sensor; /* Type of image sensor chip */
char sensor_has_gain;
#define SENSOR_HV7131R 0
#define SENSOR_OV6650 1
#define SENSOR_OV7630 2
@ -59,11 +67,24 @@ struct sd {
#define SYS_CLK 0x04
/* We calculate the autogain at the end of the transfer of a frame, at this
moment a frame with the old settings is being transmitted, and a frame is
being captured with the old settings. So if we adjust the autogain we must
ignore atleast the 2 next frames for the new settings to come into effect
before doing any other adjustments */
#define AUTOGAIN_IGNORE_FRAMES 3
#define AUTOGAIN_DEADZONE 500
#define DESIRED_AVG_LUM 7000
/* 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_setgain(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val);
static struct ctrl sd_ctrls[] = {
#define SD_BRIGHTNESS 0
@ -75,24 +96,59 @@ static struct ctrl sd_ctrls[] = {
.minimum = 0,
.maximum = 255,
.step = 1,
.default_value = 127,
#define BRIGHTNESS_DEF 127
.default_value = BRIGHTNESS_DEF,
},
.set = sd_setbrightness,
.get = sd_getbrightness,
},
#define SD_CONTRAST 1
#define SD_GAIN 1
{
{
.id = V4L2_CID_CONTRAST,
.id = V4L2_CID_GAIN,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Contrast",
.name = "Gain",
.minimum = 0,
.maximum = 255,
.maximum = 511,
.step = 1,
.default_value = 127,
#define GAIN_DEF 255
#define GAIN_KNEE 400
.default_value = GAIN_DEF,
},
.set = sd_setcontrast,
.get = sd_getcontrast,
.set = sd_setgain,
.get = sd_getgain,
},
#define SD_EXPOSURE 2
{
{
.id = V4L2_CID_EXPOSURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Exposure",
#define EXPOSURE_DEF 0
#define EXPOSURE_KNEE 353 /* 10 fps */
.minimum = 0,
.maximum = 511,
.step = 1,
.default_value = EXPOSURE_DEF,
.flags = 0,
},
.set = sd_setexposure,
.get = sd_getexposure,
},
#define SD_AUTOGAIN 3
{
{
.id = V4L2_CID_AUTOGAIN,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Automatic Gain (and Exposure)",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 1,
.flags = 0,
},
.set = sd_setautogain,
.get = sd_getautogain,
},
};
@ -153,8 +209,12 @@ static const __u8 ov6650_sensor_init[][8] =
/* Bright, contrast, etc are set througth SCBB interface.
* AVCAP on win2 do not send any data on this controls. */
/* Anyway, some registers appears to alter bright and constrat */
/* Reset sensor */
{0xa0, 0x60, 0x12, 0x80, 0x00, 0x00, 0x00, 0x10},
/* Set clock register 0x11 low nibble is clock divider */
{0xd0, 0x60, 0x11, 0xc0, 0x1b, 0x18, 0xc1, 0x10},
/* Next some unknown stuff */
{0xb0, 0x60, 0x15, 0x00, 0x02, 0x18, 0xc1, 0x10},
/* {0xa0, 0x60, 0x1b, 0x01, 0x02, 0x18, 0xc1, 0x10},
* THIS SET GREEN SCREEN
@ -163,31 +223,18 @@ static const __u8 ov6650_sensor_init[][8] =
{0xd0, 0x60, 0x26, 0x01, 0x14, 0xd8, 0xa4, 0x10}, /* format out? */
{0xd0, 0x60, 0x26, 0x01, 0x14, 0xd8, 0xa4, 0x10},
{0xa0, 0x60, 0x30, 0x3d, 0x0A, 0xd8, 0xa4, 0x10},
/* Disable autobright ? */
{0xb0, 0x60, 0x60, 0x66, 0x68, 0xd8, 0xa4, 0x10},
/* Some more unknown stuff */
{0xa0, 0x60, 0x68, 0x04, 0x68, 0xd8, 0xa4, 0x10},
{0xd0, 0x60, 0x17, 0x24, 0xd6, 0x04, 0x94, 0x10}, /* Clipreg */
{0xa0, 0x60, 0x10, 0x5d, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x2d, 0x0a, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x32, 0x00, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x33, 0x40, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x11, 0xc0, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x00, 0x16, 0x99, 0x04, 0x94, 0x15}, /* bright / Lumino */
{0xa0, 0x60, 0x2b, 0xab, 0x99, 0x04, 0x94, 0x15},
/* ?flicker o brillo */
{0xa0, 0x60, 0x2d, 0x2a, 0x99, 0x04, 0x94, 0x15},
{0xa0, 0x60, 0x2d, 0x2b, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x32, 0x00, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x33, 0x00, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x10, 0x57, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x2d, 0x2b, 0x99, 0x04, 0x94, 0x16},
{0xa0, 0x60, 0x32, 0x00, 0x99, 0x04, 0x94, 0x16},
/* Low Light (Enabled: 0x32 0x1 | Disabled: 0x32 0x00) */
{0xa0, 0x60, 0x33, 0x29, 0x99, 0x04, 0x94, 0x16},
/* Low Ligth (Enabled: 0x33 0x13 | Disabled: 0x33 0x29) */
/* {0xa0, 0x60, 0x11, 0xc1, 0x99, 0x04, 0x94, 0x16}, */
{0xa0, 0x60, 0x00, 0x17, 0x99, 0x04, 0x94, 0x15}, /* clip? r */
{0xa0, 0x60, 0x00, 0x18, 0x99, 0x04, 0x94, 0x15}, /* clip? r */
/* Framerate adjust register for artificial light 50 hz flicker
compensation, identical to ov6630 0x2b register, see 6630 datasheet.
0x4f -> (30 fps -> 25 fps), 0x00 -> no adjustment */
{0xa0, 0x60, 0x2b, 0x4f, 0x99, 0x04, 0x94, 0x15},
};
static const __u8 initOv7630[] = {
0x04, 0x44, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, /* r01 .. r08 */
0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* r09 .. r10 */
@ -469,8 +516,7 @@ static void setbrightness(struct gspca_dev *gspca_dev)
goto err;
break;
}
case SENSOR_TAS5130CXX:
case SENSOR_TAS5110: {
case SENSOR_TAS5130CXX: {
__u8 i2c[] =
{0x30, 0x11, 0x02, 0x20, 0x70, 0x00, 0x00, 0x10};
@ -481,24 +527,112 @@ static void setbrightness(struct gspca_dev *gspca_dev)
goto err;
break;
}
case SENSOR_TAS5110:
/* FIXME figure out howto control brightness on TAS5110 */
break;
}
return;
err:
PDEBUG(D_ERR, "i2c error brightness");
}
static void setcontrast(struct gspca_dev *gspca_dev)
static void setsensorgain(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
unsigned short gain;
gain = (sd->gain + 1) >> 1;
if (gain > 255)
gain = 255;
switch (sd->sensor) {
case SENSOR_TAS5110: {
__u8 i2c[] =
{0x30, 0x11, 0x02, 0x20, 0x70, 0x00, 0x00, 0x10};
i2c[4] = 255 - gain;
if (i2c_w(gspca_dev->dev, i2c) < 0)
goto err;
break; }
case SENSOR_OV6650: {
__u8 i2c[] = {0xa0, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10};
i2c[3] = gain;
if (i2c_w(gspca_dev->dev, i2c) < 0)
goto err;
break; }
}
return;
err:
PDEBUG(D_ERR, "i2c error gain");
}
static void setgain(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
__u8 gain;
__u8 rgb_value;
gain = sd->contrast >> 4;
gain = sd->gain >> 5;
/* red and blue gain */
rgb_value = gain << 4 | gain;
reg_w(gspca_dev->dev, 0x10, &rgb_value, 1);
/* green gain */
rgb_value = gain;
reg_w(gspca_dev->dev, 0x11, &rgb_value, 1);
if (sd->sensor_has_gain)
setsensorgain(gspca_dev);
}
static void setexposure(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
/* translate 0 - 255 to a number of fps in a 30 - 1 scale */
int fps = 30 - sd->exposure * 29 / 511;
switch (sd->sensor) {
case SENSOR_TAS5110: {
__u8 reg;
/* register 19's high nibble contains the sn9c10x clock divider
The high nibble configures the no fps according to the
formula: 60 / high_nibble. With a maximum of 30 fps */
reg = 60 / fps;
if (reg > 15)
reg = 15;
reg = (reg << 4) | 0x0b;
reg_w(gspca_dev->dev, 0x19, &reg, 1);
break; }
case SENSOR_OV6650: {
__u8 i2c[] = {0xa0, 0x60, 0x11, 0xc0, 0x00, 0x00, 0x00, 0x10};
i2c[3] = 30 / fps - 1;
if (i2c[3] > 15)
i2c[3] = 15;
i2c[3] |= 0xc0;
if (i2c_w(gspca_dev->dev, i2c) < 0)
PDEBUG(D_ERR, "i2c error exposure");
break; }
}
}
static void do_autogain(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int avg_lum = atomic_read(&sd->avg_lum);
if (avg_lum == -1)
return;
if (sd->autogain_ignore_frames > 0)
sd->autogain_ignore_frames--;
else if (gspca_auto_gain_n_exposure(gspca_dev, avg_lum,
sd->brightness * DESIRED_AVG_LUM / 127,
AUTOGAIN_DEADZONE, GAIN_KNEE, EXPOSURE_KNEE))
sd->autogain_ignore_frames = AUTOGAIN_IGNORE_FRAMES;
}
/* this function is called at probe time */
@ -511,7 +645,13 @@ static int sd_config(struct gspca_dev *gspca_dev,
__u16 product;
int sif = 0;
/* nctrls depends upon the sensor, so we use a per cam copy */
memcpy(&sd->sd_desc, gspca_dev->sd_desc, sizeof(struct sd_desc));
gspca_dev->sd_desc = &sd->sd_desc;
sd->fr_h_sz = 12; /* default size of the frame header */
sd->sd_desc.nctrls = 2; /* default no ctrls */
/* vendor = id->idVendor; */
product = id->idProduct;
/* switch (vendor) { */
@ -521,6 +661,9 @@ static int sd_config(struct gspca_dev *gspca_dev,
case 0x6005: /* SN9C101 */
case 0x6007: /* SN9C101 */
sd->sensor = SENSOR_TAS5110;
sd->sensor_has_gain = 1;
sd->sd_desc.nctrls = 4;
sd->sd_desc.dq_callback = do_autogain;
sif = 1;
break;
case 0x6009: /* SN9C101 */
@ -531,6 +674,9 @@ static int sd_config(struct gspca_dev *gspca_dev,
break;
case 0x6011: /* SN9C101 - SN9C101G */
sd->sensor = SENSOR_OV6650;
sd->sensor_has_gain = 1;
sd->sd_desc.nctrls = 4;
sd->sd_desc.dq_callback = do_autogain;
sif = 1;
break;
case 0x6019: /* SN9C101 */
@ -570,8 +716,10 @@ static int sd_config(struct gspca_dev *gspca_dev,
cam->cam_mode = sif_mode;
cam->nmodes = sizeof sif_mode / sizeof sif_mode[0];
}
sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
sd->brightness = BRIGHTNESS_DEF;
sd->gain = GAIN_DEF;
sd->exposure = EXPOSURE_DEF;
sd->autogain = 1;
if (sd->sensor == SENSOR_OV7630_3) /* jfm: from win trace */
reg_w(gspca_dev->dev, 0x01, probe_ov7630, sizeof probe_ov7630);
return 0;
@ -754,8 +902,12 @@ static void sd_start(struct gspca_dev *gspca_dev)
reg_w(dev, 0x18, &reg17_19[1], 2);
msleep(20);
setcontrast(gspca_dev);
setgain(gspca_dev);
setbrightness(gspca_dev);
setexposure(gspca_dev);
sd->autogain_ignore_frames = 0;
atomic_set(&sd->avg_lum, -1);
}
static void sd_stopN(struct gspca_dev *gspca_dev)
@ -779,8 +931,8 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
unsigned char *data, /* isoc packet */
int len) /* iso packet length */
{
struct sd *sd;
int i;
struct sd *sd = (struct sd *) gspca_dev;
if (len > 6 && len < 24) {
for (i = 0; i < len - 6; i++) {
@ -792,7 +944,16 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
&& data[5 + i] == 0x96) { /* start of frame */
frame = gspca_frame_add(gspca_dev, LAST_PACKET,
frame, data, 0);
sd = (struct sd *) gspca_dev;
if (i < (len - 10)) {
atomic_set(&sd->avg_lum, data[i + 8] +
(data[i + 9] << 8));
} else {
atomic_set(&sd->avg_lum, -1);
#ifdef CONFIG_VIDEO_ADV_DEBUG
PDEBUG(D_STREAM, "packet too short to "
"get avg brightness");
#endif
}
data += i + sd->fr_h_sz;
len -= i + sd->fr_h_sz;
gspca_frame_add(gspca_dev, FIRST_PACKET,
@ -823,26 +984,74 @@ static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
return 0;
}
static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->contrast = val;
sd->gain = val;
if (gspca_dev->streaming)
setcontrast(gspca_dev);
setgain(gspca_dev);
return 0;
}
static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
*val = sd->contrast;
*val = sd->gain;
return 0;
}
static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->exposure = val;
if (gspca_dev->streaming)
setexposure(gspca_dev);
return 0;
}
static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
*val = sd->exposure;
return 0;
}
static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->autogain = val;
/* when switching to autogain set defaults to make sure
we are on a valid point of the autogain gain /
exposure knee graph, and give this change time to
take effect before doing autogain. */
if (sd->autogain) {
sd->exposure = EXPOSURE_DEF;
sd->gain = GAIN_DEF;
if (gspca_dev->streaming) {
sd->autogain_ignore_frames = AUTOGAIN_IGNORE_FRAMES;
setexposure(gspca_dev);
setgain(gspca_dev);
}
}
return 0;
}
static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val)
{
struct sd *sd = (struct sd *) gspca_dev;
*val = sd->autogain;
return 0;
}
/* sub-driver description */
static struct sd_desc sd_desc = {
static const struct sd_desc sd_desc = {
.name = MODULE_NAME,
.ctrls = sd_ctrls,
.nctrls = ARRAY_SIZE(sd_ctrls),