From 89f9a2b48dabb22e84ddf4ca07284499aa5fc152 Mon Sep 17 00:00:00 2001 From: "hans@rhel5-devel.localdomain" Date: Wed, 29 Jul 2009 13:02:50 +0200 Subject: gspca_pac207: remove a number of unneeded (repeated) register writes From: Hans de Goede gspca_pac207: remove a number of unneeded (repeated) register writes Priority: normal Signed-off-by: Hans de Goede --- linux/drivers/media/video/gspca/pac207.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) (limited to 'linux/drivers/media/video/gspca/pac207.c') diff --git a/linux/drivers/media/video/gspca/pac207.c b/linux/drivers/media/video/gspca/pac207.c index 95a97ab68..f20d21b1c 100644 --- a/linux/drivers/media/video/gspca/pac207.c +++ b/linux/drivers/media/video/gspca/pac207.c @@ -169,13 +169,9 @@ static const __u8 pac207_sensor_init[][8] = { {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0xf0}, {0x00, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30}, {0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00}, - {0x00, 0x00, 0x32, 0x00, 0x96, 0x00, 0xa2, 0x02}, {0x32, 0x00, 0x96, 0x00, 0xA2, 0x02, 0xaf, 0x00}, }; - /* 48 reg_72 Rate Control end BalSize_4a =0x36 */ -static const __u8 PacReg72[] = { 0x00, 0x00, 0x36, 0x00 }; - static int pac207_write_regs(struct gspca_dev *gspca_dev, u16 index, const u8 *buffer, u16 length) { @@ -274,7 +270,6 @@ static int sd_init(struct gspca_dev *gspca_dev) * Bit_1=LED, * Bit_2=Compression test mode enable */ pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */ - pac207_write_reg(gspca_dev, 0x11, 0x30); /* Analog Bias */ return 0; } @@ -289,9 +284,7 @@ static int sd_start(struct gspca_dev *gspca_dev) pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8); pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8); pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8); - pac207_write_regs(gspca_dev, 0x0040, pac207_sensor_init[3], 8); - pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[4], 8); - pac207_write_regs(gspca_dev, 0x0048, PacReg72, 4); + pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8); /* Compression Balance */ if (gspca_dev->width == 176) -- cgit v1.2.3 From 2f1c03be87cb8cd9f645aaf4c5c7206f3141ddad Mon Sep 17 00:00:00 2001 From: "hans@rhel5-devel.localdomain" Date: Wed, 29 Jul 2009 13:03:17 +0200 Subject: gspca_pac207: enable higher framerates / lower exposure settings From: Hans de Goede Now that we've figured out the higher compression settings (supported in libv4l-0.6.0 and later, so after this patch the driver should be used with libv4l-0.6.0 or higher only!), we can enable higher framerates. Which means lower exposure times, which is important for the use of the pac207 in full daylight. This patch also tweakes the brightness default and the per color gain balances to use the values which are adviced by Pixart in the pac207 application note. Priority: normal Signed-off-by: Hans de Goede --- linux/drivers/media/video/gspca/pac207.c | 28 ++++++++++------------------ 1 file changed, 10 insertions(+), 18 deletions(-) (limited to 'linux/drivers/media/video/gspca/pac207.c') diff --git a/linux/drivers/media/video/gspca/pac207.c b/linux/drivers/media/video/gspca/pac207.c index f20d21b1c..96659433d 100644 --- a/linux/drivers/media/video/gspca/pac207.c +++ b/linux/drivers/media/video/gspca/pac207.c @@ -35,25 +35,17 @@ MODULE_LICENSE("GPL"); #define PAC207_BRIGHTNESS_MIN 0 #define PAC207_BRIGHTNESS_MAX 255 -#define PAC207_BRIGHTNESS_DEFAULT 4 /* power on default: 4 */ - -/* An exposure value of 4 also works (3 does not) but then we need to lower - the compression balance setting when in 352x288 mode, otherwise the usb - bandwidth is not enough and packets get dropped resulting in corrupt - frames. The problem with this is that when the compression balance gets - lowered below 0x80, the pac207 starts using a different compression - algorithm for some lines, these lines get prefixed with a 0x2dd2 prefix - and currently we do not know how to decompress these lines, so for now - we use a minimum exposure value of 5 */ -#define PAC207_EXPOSURE_MIN 5 +#define PAC207_BRIGHTNESS_DEFAULT 46 + +#define PAC207_EXPOSURE_MIN 3 #define PAC207_EXPOSURE_MAX 26 -#define PAC207_EXPOSURE_DEFAULT 5 /* power on default: 3 ?? */ -#define PAC207_EXPOSURE_KNEE 11 /* 4 = 30 fps, 11 = 8, 15 = 6 */ +#define PAC207_EXPOSURE_DEFAULT 5 /* power on default: 3 */ +#define PAC207_EXPOSURE_KNEE 8 /* 4 = 30 fps, 11 = 8, 15 = 6 */ #define PAC207_GAIN_MIN 0 #define PAC207_GAIN_MAX 31 #define PAC207_GAIN_DEFAULT 9 /* power on default: 9 */ -#define PAC207_GAIN_KNEE 20 +#define PAC207_GAIN_KNEE 31 #define PAC207_AUTOGAIN_DEADZONE 30 @@ -166,8 +158,8 @@ static const struct v4l2_pix_format sif_mode[] = { }; static const __u8 pac207_sensor_init[][8] = { - {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0xf0}, - {0x00, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30}, + {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84}, + {0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30}, {0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00}, {0x32, 0x00, 0x96, 0x00, 0xA2, 0x02, 0xaf, 0x00}, }; @@ -290,7 +282,7 @@ static int sd_start(struct gspca_dev *gspca_dev) if (gspca_dev->width == 176) pac207_write_reg(gspca_dev, 0x4a, 0xff); else - pac207_write_reg(gspca_dev, 0x4a, 0x88); + pac207_write_reg(gspca_dev, 0x4a, 0x30); pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */ pac207_write_reg(gspca_dev, 0x08, sd->brightness); @@ -339,7 +331,7 @@ static void pac207_do_auto_gain(struct gspca_dev *gspca_dev) if (sd->autogain_ignore_frames > 0) sd->autogain_ignore_frames--; else if (gspca_auto_gain_n_exposure(gspca_dev, avg_lum, - 100 + sd->brightness / 2, PAC207_AUTOGAIN_DEADZONE, + 100, PAC207_AUTOGAIN_DEADZONE, PAC207_GAIN_KNEE, PAC207_EXPOSURE_KNEE)) sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES; } -- cgit v1.2.3