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V4L/DVB (3551): Fix saturation bug. Fix NTSC->PAL standard change. Detect NTSC-KR standard. 

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil 2006-03-16 20:23:47 -03:00 committed by Mauro Carvalho Chehab
parent 6637e6fd2a
commit 73dcddc583
1 changed files with 31 additions and 4 deletions
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35
drivers/media/video/cx25840/cx25840-core.c
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@ -176,9 +176,9 @@ static void cx25840_initialize(struct i2c_client *client, int loadfw)
cx25840_write(client, 0x4a5, 0x00);
cx25840_write(client, 0x402, 0x00);
/* 8. */
cx25840_write(client, 0x401, 0x18);
cx25840_write(client, 0x4a2, 0x10);
cx25840_write(client, 0x402, 0x04);
cx25840_and_or(client, 0x401, ~0x18, 0);
cx25840_and_or(client, 0x4a2, ~0x10, 0x10);
/* steps 8c and 8d are done in change_input() */
/* 10. */
cx25840_write(client, 0x8d3, 0x1f);
cx25840_write(client, 0x8e3, 0x03);
@ -209,6 +209,17 @@ static void input_change(struct i2c_client *client)
struct cx25840_state *state = i2c_get_clientdata(client);
v4l2_std_id std = cx25840_get_v4lstd(client);
/* Follow step 8c and 8d of section 3.16 in the cx25840 datasheet */
if (std & V4L2_STD_SECAM) {
cx25840_write(client, 0x402, 0);
}
else {
cx25840_write(client, 0x402, 0x04);
cx25840_write(client, 0x49f, (std & V4L2_STD_NTSC) ? 0x14 : 0x11);
}
cx25840_and_or(client, 0x401, ~0x60, 0);
cx25840_and_or(client, 0x401, ~0x60, 0x60);
/* Note: perhaps V4L2_STD_PAL_M should be handled as V4L2_STD_NTSC
instead of V4L2_STD_PAL. Someone needs to test this. */
if (std & V4L2_STD_PAL) {
@ -343,6 +354,15 @@ static int set_v4lstd(struct i2c_client *client, v4l2_std_id std)
}
}
/* Follow step 9 of section 3.16 in the cx25840 datasheet.
Without this PAL may display a vertical ghosting effect.
This happens for example with the Yuan MPC622. */
if (fmt >= 4 && fmt < 8) {
/* Set format to NTSC-M */
cx25840_and_or(client, 0x400, ~0xf, 1);
/* Turn off LCOMB */
cx25840_and_or(client, 0x47b, ~6, 0);
}
cx25840_and_or(client, 0x400, ~0xf, fmt);
cx25840_vbi_setup(client);
return 0;
@ -359,7 +379,14 @@ v4l2_std_id cx25840_get_v4lstd(struct i2c_client * client)
}
switch (fmt) {
case 0x1: return V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_KR;
case 0x1:
{
/* if the audio std is A2-M, then this is the South Korean
NTSC standard */
if (cx25840_read(client, 0x805) == 2)
return V4L2_STD_NTSC_M_KR;
return V4L2_STD_NTSC_M;
}
case 0x2: return V4L2_STD_NTSC_M_JP;
case 0x3: return V4L2_STD_NTSC_443;
case 0x4: return V4L2_STD_PAL;