diff options
| author | Brian Johnson <brijohn@gmail.com> | 2009-09-02 12:39:41 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-12 12:20:11 -0300 |
| commit | e14304712939133d58a5132501e80509658e0449 (patch) | |
| tree | c31ca4dfeedaaee3a6e1f319ef189b985973ed10 /drivers/media/video | |
| parent | f077b0a64856c5b3bf346ae9fba8631c1fb210cf (diff) | |
V4L/DVB (12704): gspca - sn9c20x: Fix exposure on SOI968 sensors
Fixes broken exposure on SOI968 webcams that was causing
the camera to display a black screen
Signed-off-by: Brian Johnson <brijohn@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video')
| -rw-r--r-- | drivers/media/video/gspca/sn9c20x.c | 53 |
1 files changed, 42 insertions, 11 deletions
diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c index 52a7f8edf7a..a74c36f4c8d 100644 --- a/drivers/media/video/gspca/sn9c20x.c +++ b/drivers/media/video/gspca/sn9c20x.c @@ -799,7 +799,7 @@ static u8 soi968_init[][2] = { {0x37, 0x04}, {0x45, 0x04}, {0x47, 0xff}, {0x3e, 0x00}, {0x3f, 0x00}, {0x3b, 0x20}, {0x3a, 0x96}, {0x3d, 0x0a}, {0x14, 0x8e}, - {0x13, 0x8a}, {0x12, 0x40}, {0x17, 0x13}, + {0x13, 0x8b}, {0x12, 0x40}, {0x17, 0x13}, {0x18, 0x63}, {0x19, 0x01}, {0x1a, 0x79}, {0x32, 0x24}, {0x03, 0x00}, {0x11, 0x40}, {0x2a, 0x10}, {0x2b, 0xe0}, {0x10, 0x32}, @@ -1246,7 +1246,7 @@ static int soi968_init_sensor(struct gspca_dev *gspca_dev) } } /* disable hflip and vflip */ - gspca_dev->ctrl_dis = (1 << HFLIP_IDX) | (1 << VFLIP_IDX); + gspca_dev->ctrl_dis = (1 << HFLIP_IDX) | (1 << VFLIP_IDX) | (1 << EXPOSURE_IDX); sd->hstart = 60; sd->vstart = 11; return 0; @@ -1622,7 +1622,6 @@ static int set_exposure(struct gspca_dev *gspca_dev) switch (sd->sensor) { case SENSOR_OV7660: case SENSOR_OV7670: - case SENSOR_SOI968: case SENSOR_OV9655: case SENSOR_OV9650: exp[0] |= (3 << 4); @@ -1647,6 +1646,8 @@ static int set_exposure(struct gspca_dev *gspca_dev) exp[4] = ((sd->exposure * 0xffffff) / 0xffff) >> 8; exp[5] = ((sd->exposure * 0xffffff) / 0xffff) & 0xff; break; + default: + return 0; } i2c_w(gspca_dev, exp); return 0; @@ -1690,6 +1691,8 @@ static int set_gain(struct gspca_dev *gspca_dev) gain[2] = 0x30; gain[3] = hv7131r_gain[sd->gain]; break; + default: + return 0; } i2c_w(gspca_dev, gain); return 0; @@ -2213,15 +2216,10 @@ static void sd_stop0(struct gspca_dev *gspca_dev) kfree(sd->jpeg_hdr); } -static void do_autoexposure(struct gspca_dev *gspca_dev) +static void do_autoexposure(struct gspca_dev *gspca_dev, u16 avg_lum) { struct sd *sd = (struct sd *) gspca_dev; - int avg_lum, new_exp; - - if (!sd->auto_exposure) - return; - - avg_lum = atomic_read(&sd->avg_lum); + s16 new_exp; /* * some hardcoded values are present @@ -2268,6 +2266,39 @@ static void do_autoexposure(struct gspca_dev *gspca_dev) } } +static void do_autogain(struct gspca_dev *gspca_dev, u16 avg_lum) +{ + struct sd *sd = (struct sd *) gspca_dev; + + if (avg_lum < MIN_AVG_LUM) { + if (sd->gain + 1 <= 28) { + sd->gain++; + set_gain(gspca_dev); + } + } + if (avg_lum > MAX_AVG_LUM) { + if (sd->gain - 1 >= 0) { + sd->gain--; + set_gain(gspca_dev); + } + } +} + +static void sd_dqcallback(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + int avg_lum; + + if (!sd->auto_exposure) + return; + + avg_lum = atomic_read(&sd->avg_lum); + if (sd->sensor == SENSOR_SOI968) + do_autogain(gspca_dev, avg_lum); + else + do_autoexposure(gspca_dev, avg_lum); +} + static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame, /* target */ u8 *data, /* isoc packet */ @@ -2335,7 +2366,7 @@ static const struct sd_desc sd_desc = { .stopN = sd_stopN, .stop0 = sd_stop0, .pkt_scan = sd_pkt_scan, - .dq_callback = do_autoexposure, + .dq_callback = sd_dqcallback, #ifdef CONFIG_VIDEO_ADV_DEBUG .set_register = sd_dbg_s_register, .get_register = sd_dbg_g_register, |