From a1ac5dc28d2b4ca78e183229f7c595ffd725241c Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jean-Fran=C3=A7ois=20Moine?= Date: Sat, 24 Mar 2012 09:33:42 -0300 Subject: [PATCH] [media] gspca - sn9c20x: Change the exposure setting of Omnivision sensors MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The exposure of Omnivision sensors is defined by the registers 07, 10 and 04. This patch updates the registers 10 and 04 before using the registers 2d and 2e (dummy lines). Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/sn9c20x.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/media/video/gspca/sn9c20x.c b/drivers/media/video/gspca/sn9c20x.c index da2904a891aa..5285a519c1f3 100644 --- a/drivers/media/video/gspca/sn9c20x.c +++ b/drivers/media/video/gspca/sn9c20x.c @@ -874,8 +874,8 @@ static const struct i2c_reg_u8 ov7660_init[] = { 0x10, 0x61 and sd->hstart, vstart = 3, fixes ugly colored borders */ {0x17, 0x10}, {0x18, 0x61}, {0x37, 0x0f}, {0x38, 0x02}, {0x39, 0x43}, - {0x3a, 0x00}, {0x69, 0x90}, {0x2d, 0xf6}, - {0x2e, 0x0b}, {0x01, 0x78}, {0x02, 0x50}, + {0x3a, 0x00}, {0x69, 0x90}, {0x2d, 0x00}, + {0x2e, 0x00}, {0x01, 0x78}, {0x02, 0x50}, }; static const struct i2c_reg_u8 ov7670_init[] = { @@ -1645,7 +1645,7 @@ static void set_exposure(struct gspca_dev *gspca_dev) struct sd *sd = (struct sd *) gspca_dev; u8 exp[8] = {sd->i2c_intf, sd->i2c_addr, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10}; - int expo; + int expo, expo2; if (gspca_dev->streaming) exp[7] = 0x1e; @@ -1656,8 +1656,23 @@ static void set_exposure(struct gspca_dev *gspca_dev) case SENSOR_OV7670: case SENSOR_OV9655: case SENSOR_OV9650: + if (expo > 547) + expo2 = 547; + else + expo2 = expo; + exp[0] |= (2 << 4); + exp[2] = 0x10; /* AECH */ + exp[3] = expo2 >> 2; + exp[7] = 0x10; + i2c_w(gspca_dev, exp); + exp[2] = 0x04; /* COM1 */ + exp[3] = expo2 & 0x0003; + exp[7] = 0x10; + i2c_w(gspca_dev, exp); + expo -= expo2; + exp[7] = 0x1e; exp[0] |= (3 << 4); - exp[2] = 0x2d; + exp[2] = 0x2d; /* ADVFL & ADVFH */ exp[3] = expo; exp[4] = expo >> 8; break; -- 2.11.0