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Commit c0f4c0ad authored by Michael Krufky's avatar Michael Krufky Committed by Mauro Carvalho Chehab
Browse files

V4L/DVB (8146): lgdt330x: add additional FEC control configuration option 



Allow the following configuration, by passing clock_polarity_flip = 2:

Enable FEC automatic reset. Disable spectrum inversion.
Enable viterbi resynchronization. Set polarity indicator high.
Enable error flag insertion.

Thanks to Daniel Gimpelevich, for discovering that this configuration
is used on the AVerMedia AVerTVHD Volar.

Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
CC: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent ecfceef7

drivers/media/dvb/frontends/lgdt330x.c

+19 −5
Original line number Diff line number Diff line
@@ -226,11 +226,16 @@ static int lgdt330x_init(struct dvb_frontend* fe) 
		0x4c, 0x14

	};



	static u8 flip_lgdt3303_init_data[] = {

	static u8 flip_1_lgdt3303_init_data[] = {

		0x4c, 0x14,

		0x87, 0xf3

	};



	static u8 flip_2_lgdt3303_init_data[] = {

		0x4c, 0x14,

		0x87, 0xda

	};



	struct lgdt330x_state* state = fe->demodulator_priv;

	char  *chip_name;

	int    err;
@@ -243,10 +248,19 @@ static int lgdt330x_init(struct dvb_frontend* fe) 
		break;

	case LGDT3303:

		chip_name = "LGDT3303";

		if (state->config->clock_polarity_flip) {

			err = i2c_write_demod_bytes(state, flip_lgdt3303_init_data,

						    sizeof(flip_lgdt3303_init_data));

		} else {

		switch (state->config->clock_polarity_flip) {

		case 2:

			err = i2c_write_demod_bytes(state,

					flip_2_lgdt3303_init_data,

					sizeof(flip_2_lgdt3303_init_data));

			break;

		case 1:

			err = i2c_write_demod_bytes(state,

					flip_1_lgdt3303_init_data,

					sizeof(flip_1_lgdt3303_init_data));

			break;

		case 0:

		default:

			err = i2c_write_demod_bytes(state, lgdt3303_init_data,

						    sizeof(lgdt3303_init_data));

		}