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[media] drxk: Add a fallback method for QAM parameter setting

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The QAM standard is set using this scu_command:
	SCU_RAM_COMMAND_STANDARD_QAM |
	SCU_RAM_COMMAND_CMD_DEMOD_SET_PARAM

The driver implements a version that has 4 parameters, however,
Terratec H5 needs to break this into two separate commands, otherwise,
DVB-C doesn't work.

With this fix, scan is now properly working and getting the
channel list:
>>> tune to: 609000000:INVERSION_AUTO:5217000:FEC_3_4:QAM_256
>>> tuning status == 0x00
>>> tuning status == 0x07
>>> tuning status == 0x1f

0x0093 0x0026: pmt_pid 0x0758 (null) -- SporTV2 (running, scrambled)
0x0093 0x0027: pmt_pid 0x0748 (null) -- SporTV (running, scrambled)
0x0093 0x0036: pmt_pid 0x0768 (null) -- FX (running, scrambled)
0x0093 0x0052: pmt_pid 0x0788 (null) -- The History Channel (running, scrambled)

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2011-07-10 14:33:29 -03:00
parent 7558977a4a
commit 5eee2bb270
1 changed files with 17 additions and 1 deletions
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18
drivers/media/dvb/frontends/drxk_hard.c
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@ -5389,7 +5389,7 @@ static int SetQAM(struct drxk_state *state, u16 IntermediateFreqkHz,
{
int status;
u8 parameterLen;
u16 setEnvParameters[5];
u16 setEnvParameters[5] = { 0, 0, 0, 0, 0 };
u16 setParamParameters[4] = { 0, 0, 0, 0 };
u16 cmdResult;
@ -5456,9 +5456,25 @@ static int SetQAM(struct drxk_state *state, u16 IntermediateFreqkHz,
setParamParameters[1] = DRXK_QAM_I12_J17; /* interleave mode */
status = scu_command(state, SCU_RAM_COMMAND_STANDARD_QAM | SCU_RAM_COMMAND_CMD_DEMOD_SET_PARAM, 4, setParamParameters, 1, &cmdResult);
if (status < 0) {
/* Fall-back to the simpler call */
setParamParameters[0] = QAM_TOP_ANNEX_A;
if (state->m_OperationMode == OM_QAM_ITU_C)
setEnvParameters[0] = QAM_TOP_ANNEX_C; /* Annex */
else
setEnvParameters[0] = 0;
status = scu_command(state, SCU_RAM_COMMAND_STANDARD_QAM | SCU_RAM_COMMAND_CMD_DEMOD_SET_ENV, 1, setEnvParameters, 1, &cmdResult);
if (status < 0)
goto error;
setParamParameters[0] = state->m_Constellation; /* constellation */
setParamParameters[1] = DRXK_QAM_I12_J17; /* interleave mode */
status = scu_command(state, SCU_RAM_COMMAND_STANDARD_QAM | SCU_RAM_COMMAND_CMD_DEMOD_SET_PARAM, 2, setParamParameters, 1, &cmdResult);
}
if (status < 0)
goto error;
/* STEP 3: enable the system in a mode where the ADC provides valid signal
setup constellation independent registers */