From 6f92c3a22ccd66604b8b528221a9d8e1b3fb4e39 Mon Sep 17 00:00:00 2001 From: Ondrej Zary Date: Fri, 25 May 2018 05:08:41 -0400 Subject: media: gspca_zc3xx: Implement proper autogain and exposure control for OV7648 The ZS0211 internal autogain causes pumping and flickering with OV7648 sensor on 0ac8:307b webcam. Implement OV7648 autogain and exposure control and use that instead. Signed-off-by: Ondrej Zary Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/gspca/zc3xx.c | 42 +++++++++++++++++++++++++++++++++-------- 1 file changed, 34 insertions(+), 8 deletions(-) (limited to 'drivers/media') diff --git a/drivers/media/usb/gspca/zc3xx.c b/drivers/media/usb/gspca/zc3xx.c index 25b4dbe8e049..992918b3ad0c 100644 --- a/drivers/media/usb/gspca/zc3xx.c +++ b/drivers/media/usb/gspca/zc3xx.c @@ -5778,16 +5778,34 @@ static void setcontrast(struct gspca_dev *gspca_dev, static s32 getexposure(struct gspca_dev *gspca_dev) { - return (i2c_read(gspca_dev, 0x25) << 9) - | (i2c_read(gspca_dev, 0x26) << 1) - | (i2c_read(gspca_dev, 0x27) >> 7); + struct sd *sd = (struct sd *) gspca_dev; + + switch (sd->sensor) { + case SENSOR_HV7131R: + return (i2c_read(gspca_dev, 0x25) << 9) + | (i2c_read(gspca_dev, 0x26) << 1) + | (i2c_read(gspca_dev, 0x27) >> 7); + case SENSOR_OV7620: + return i2c_read(gspca_dev, 0x10); + default: + return -1; + } } static void setexposure(struct gspca_dev *gspca_dev, s32 val) { - i2c_write(gspca_dev, 0x25, val >> 9, 0x00); - i2c_write(gspca_dev, 0x26, val >> 1, 0x00); - i2c_write(gspca_dev, 0x27, val << 7, 0x00); + struct sd *sd = (struct sd *) gspca_dev; + + switch (sd->sensor) { + case SENSOR_HV7131R: + i2c_write(gspca_dev, 0x25, val >> 9, 0x00); + i2c_write(gspca_dev, 0x26, val >> 1, 0x00); + i2c_write(gspca_dev, 0x27, val << 7, 0x00); + break; + case SENSOR_OV7620: + i2c_write(gspca_dev, 0x10, val, 0x00); + break; + } } static void setquality(struct gspca_dev *gspca_dev) @@ -5918,7 +5936,12 @@ static void setlightfreq(struct gspca_dev *gspca_dev, s32 val) static void setautogain(struct gspca_dev *gspca_dev, s32 val) { - reg_w(gspca_dev, val ? 0x42 : 0x02, 0x0180); + struct sd *sd = (struct sd *) gspca_dev; + + if (sd->sensor == SENSOR_OV7620) + i2c_write(gspca_dev, 0x13, val ? 0xa3 : 0x80, 0x00); + else + reg_w(gspca_dev, val ? 0x42 : 0x02, 0x0180); } /* @@ -6439,6 +6462,9 @@ static int sd_init_controls(struct gspca_dev *gspca_dev) if (sd->sensor == SENSOR_HV7131R) sd->exposure = v4l2_ctrl_new_std(hdl, &zcxx_ctrl_ops, V4L2_CID_EXPOSURE, 0x30d, 0x493e, 1, 0x927); + else if (sd->sensor == SENSOR_OV7620) + sd->exposure = v4l2_ctrl_new_std(hdl, &zcxx_ctrl_ops, + V4L2_CID_EXPOSURE, 0, 255, 1, 0x41); sd->autogain = v4l2_ctrl_new_std(hdl, &zcxx_ctrl_ops, V4L2_CID_AUTOGAIN, 0, 1, 1, 1); if (sd->sensor != SENSOR_OV7630C) @@ -6458,7 +6484,7 @@ static int sd_init_controls(struct gspca_dev *gspca_dev) return hdl->error; } v4l2_ctrl_cluster(3, &sd->gamma); - if (sd->sensor == SENSOR_HV7131R) + if (sd->sensor == SENSOR_HV7131R || sd->sensor == SENSOR_OV7620) v4l2_ctrl_auto_cluster(2, &sd->autogain, 0, true); return 0; } -- cgit v1.2.3