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[media] cx88: implemented luma notch filter control 

The following patch adds a new control that makes it possible to set the
luma notch filter type to finetune picture quality.

Signed-off-by: Istvan Varga <istvan_v@mailbox.hu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
istvan_v@mailbox.hu 2011-07-11 11:07:43 -03:00 committed by Mauro Carvalho Chehab
parent eea16e3661
commit bded70d296
2 changed files with 20 additions and 2 deletions
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7
drivers/media/video/cx88/cx88-core.c
View File

@ -636,6 +636,9 @@ int cx88_reset(struct cx88_core *core)
cx_write(MO_PCI_INTSTAT, 0xFFFFFFFF); // Clear PCI int
cx_write(MO_INT1_STAT, 0xFFFFFFFF); // Clear RISC int
/* set default notch filter */
cx_andor(MO_HTOTAL, 0x1800, (HLNotchFilter4xFsc << 11));
/* Reset on-board parts */
cx_write(MO_SRST_IO, 0);
msleep(10);
@ -994,10 +997,10 @@ int cx88_set_tvnorm(struct cx88_core *core, v4l2_std_id norm)
// htotal
tmp64 = norm_htotal(norm) * (u64)vdec_clock;
do_div(tmp64, fsc8);
htotal = (u32)tmp64 | (HLNotchFilter4xFsc << 11);
htotal = (u32)tmp64;
dprintk(1,"set_tvnorm: MO_HTOTAL 0x%08x [old=0x%08x,htotal=%d]\n",
htotal, cx_read(MO_HTOTAL), (u32)tmp64);
cx_write(MO_HTOTAL, htotal);
cx_andor(MO_HTOTAL, 0x07ff, htotal);
// vbi stuff, set vbi offset to 10 (for 20 Clk*2 pixels), this makes
// the effective vbi offset ~244 samples, the same as the Bt8x8

15
drivers/media/video/cx88/cx88-video.c
View File

@ -261,6 +261,20 @@ static const struct cx88_ctrl cx8800_ctls[] = {
.reg = MO_INPUT_FORMAT,
.mask = 1 << 9,
.shift = 9,
}, {
.v = {
.id = V4L2_CID_BAND_STOP_FILTER,
.name = "Notch filter",
.minimum = 0,
.maximum = 3,
.step = 1,
.default_value = 0x0,
.type = V4L2_CTRL_TYPE_INTEGER,
},
.off = 0,
.reg = MO_HTOTAL,
.mask = 3 << 11,
.shift = 11,
}, {
/* --- audio --- */
.v = {
@ -320,6 +334,7 @@ const u32 cx88_user_ctrls[] = {
V4L2_CID_SHARPNESS,
V4L2_CID_CHROMA_AGC,
V4L2_CID_COLOR_KILLER,
V4L2_CID_BAND_STOP_FILTER,
0
};
EXPORT_SYMBOL(cx88_user_ctrls);