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| author | Jean-François Moine <moinejf@free.fr> | 2010-04-25 20:25:42 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-05-19 17:58:16 +0200 |
| commit | a85675316f24835ce0c3286ee3cb33fa2f24bca7 (patch) | |
| tree | c8014585650f181d5318a0e723223f5cd7291621 /drivers/media/video | |
| parent | V4L/DVB: gspca - zc3xx.c: Remove the brightness control (diff) | |
| download | linux-a85675316f24835ce0c3286ee3cb33fa2f24bca7.tar.xz linux-a85675316f24835ce0c3286ee3cb33fa2f24bca7.zip | |
V4L/DVB: gspca - zc3xx: Fix the gamma calculation from the contrast
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video')
| -rw-r--r-- | drivers/media/video/gspca/zc3xx.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/media/video/gspca/zc3xx.c b/drivers/media/video/gspca/zc3xx.c index 1bab5086bada..d02aa5c8472a 100644 --- a/drivers/media/video/gspca/zc3xx.c +++ b/drivers/media/video/gspca/zc3xx.c @@ -6014,8 +6014,8 @@ static void setcontrast(struct gspca_dev *gspca_dev) int g, i, k, adj, gp; u8 gr[16]; static const u8 delta_tb[16] = /* delta for contrast */ - {0x15, 0x0d, 0x0a, 0x09, 0x08, 0x08, 0x08, 0x08, - 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08}; + {0x2c, 0x1a, 0x12, 0x0c, 0x0a, 0x06, 0x06, 0x06, + 0x04, 0x06, 0x04, 0x04, 0x03, 0x03, 0x02, 0x02}; static const u8 gamma_tb[6][16] = { {0x00, 0x00, 0x03, 0x0d, 0x1b, 0x2e, 0x45, 0x5f, 0x79, 0x93, 0xab, 0xc1, 0xd4, 0xe5, 0xf3, 0xff}, @@ -6037,11 +6037,11 @@ static void setcontrast(struct gspca_dev *gspca_dev) adj = 0; gp = 0; for (i = 0; i < 16; i++) { - g = Tgamma[i] - delta_tb[i] * k / 128 - adj / 2; + g = Tgamma[i] - delta_tb[i] * k / 256 - adj / 2; if (g > 0xff) g = 0xff; - else if (g <= 0) - g = 1; + else if (g < 0) + g = 0; reg_w(dev, g, 0x0120 + i); /* gamma */ if (k > 0) adj--; |