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Commit f0289efa authored by Klaas de Waal's avatar Klaas de Waal Committed by Mauro Carvalho Chehab
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V4L/DVB: dst: fixes for DVB-C Twinhan VP2031 



Remove check  "state->dst_type == DST_DTYPE_IS_CABLE"  in function
dst_get_tuna (around line 1352) to select the correct checksum
computation

Fill in the .caps field in struct dst_dvbc_ops (around line 1824) with
all the supported QAM modulation methods to match the capabilities of
the card as implemented in function dst_set_modulation (around line
502). Note that beginning with linux kernel version 2.6.32 the
modulation method is checked (by function
dvb_frontend_check_parameters in file
drivers/media/dvb/dvb-core/dvb_frontend.c) and thus tuning fails if
you use a modulation method that is not present in the .caps field.

This patch has been tested on a Twinhan VP2031A DVB-C card with the
2.6.32.2 kernel.

Signed-off-by: default avatarKlaas de Waal <klaas.de.waal@gmail.com>
Signed-off-by: default avatarManu Abraham <manu@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent dd6ed861

drivers/media/dvb/bt8xx/dst.c

+8 −4
Original line number Diff line number Diff line
@@ -1352,7 +1352,6 @@ static int dst_get_tuna(struct dst_state *state) 
		return retval;

	}

	if ((state->type_flags & DST_TYPE_HAS_VLF) &&

		!(state->dst_type == DST_TYPE_IS_CABLE) &&

	   !(state->dst_type == DST_TYPE_IS_ATSC)) {



		if (state->rx_tuna[9] != dst_check_sum(&state->rx_tuna[0], 9)) {
@@ -1820,8 +1819,13 @@ static struct dvb_frontend_ops dst_dvbc_ops = { 
		.frequency_max = 858000000,

		.symbol_rate_min = 1000000,

		.symbol_rate_max = 45000000,

	/*     . symbol_rate_tolerance	=	???,*/

		.caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO

		.caps = FE_CAN_FEC_AUTO |

			FE_CAN_QAM_AUTO |

			FE_CAN_QAM_16	|

			FE_CAN_QAM_32	|

			FE_CAN_QAM_64	|

			FE_CAN_QAM_128	|

			FE_CAN_QAM_256

	},



	.release = dst_release,