From 73dcddc583c40bcc9e6bf468c78c31930899922c Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Thu, 16 Mar 2006 20:23:47 -0300 Subject: [PATCH] V4L/DVB (3551): Fix saturation bug. Fix NTSC->PAL standard change. Detect NTSC-KR standard. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx25840/cx25840-core.c | 35 +++++++++++++++++++--- 1 file changed, 31 insertions(+), 4 deletions(-) diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c index 8a25797805..bcb7ef85eb 100644 --- a/drivers/media/video/cx25840/cx25840-core.c +++ b/drivers/media/video/cx25840/cx25840-core.c @@ -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; -- 2.39.5