ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 04:33:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

media: dvb-frontends\stid135: Change LLR calculation.

Browse Source
This commit is contained in:
CrazyCat
2023-09-12 01:12:05 +03:00
parent 07553ef72e
commit 0a3fbba551
1 changed files with 48 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
drivers/media/dvb-frontends/stid135/stid135_drv.c
View File

@@ -11604,43 +11604,55 @@ fe_lla_error_t get_current_llr(fe_stid135_handle_t handle,enum fe_stid135_demod
s32 fld_value[2];
struct fe_stid135_internal_param *pParams;
pParams = (struct fe_stid135_internal_param *) handle;
// Bit rate = Mclk * tsfifo_bitrate / 16384
ChipGetField(pParams->handle_demod, FLD_FC8CODEW_DVBSX_HWARE_TSBITRATE1_TSFIFO_BITRATE(demod_path), &(fld_value[0]));
ChipGetField(pParams->handle_demod, FLD_FC8CODEW_DVBSX_HWARE_TSBITRATE0_TSFIFO_BITRATE(demod_path), &(fld_value[1]));
//printk("Symbol rate = %d\n", pParams->demod_results[demod_path-1].symbol_rate);
*current_llr = pParams->demod_results[demod_path-1].symbol_rate;
switch(pParams->demod_results[demod_path-1].modulation)
{
case FE_SAT_MOD_QPSK:
*current_llr *= 2;
break;
case FE_SAT_MOD_8PSK:
case FE_SAT_MOD_8PSK_L:
*current_llr *= 3;
break;
case FE_SAT_MOD_16APSK:
case FE_SAT_MOD_16APSK_L:
*current_llr *= 4;
break;
case FE_SAT_MOD_32APSK:
case FE_SAT_MOD_32APSK_L:
*current_llr *= 5;
break;
case FE_SAT_MOD_64APSK:
case FE_SAT_MOD_64APSK_L:
*current_llr *= 6;
break;
case FE_SAT_MOD_128APSK:
*current_llr *= 7;
break;
case FE_SAT_MOD_256APSK:
case FE_SAT_MOD_256APSK_L:
*current_llr *= 8;
break;
case FE_SAT_MOD_1024APSK:
*current_llr *= 10;
break;
}
raw_bit_rate = ((fld_value[0]) << 8) + (fld_value[1]);
FE_STiD135_GetMclkFreq(pParams, (u32*)&(fld_value[0]));
raw_bit_rate = (s32)(((fld_value[0])/16384)) * raw_bit_rate;
printk("\nBit rate = %d Mbits/s\n", raw_bit_rate/1000000);
// LLR = TS bitrate * 1 / PR
if(pParams->demod_results[demod_path-1].modcode != 0) {
if(pParams->demod_results[demod_path-1].standard == FE_SAT_DVBS2_STANDARD) {
if(pParams->demod_results[demod_path-1].modcode <= 131)
*current_llr = (raw_bit_rate / 100) * dvbs2_modcode_for_llr_x100[pParams->demod_results[demod_path-1].modcode];
}
if(pParams->demod_results[demod_path-1].standard == FE_SAT_DVBS1_STANDARD) {
if(pParams->demod_results[demod_path-1].puncture_rate <= 8)
*current_llr = (raw_bit_rate / 100) * dvbs1_modcode_for_llr_x100[pParams->demod_results[demod_path-1].puncture_rate];
}
if(*current_llr != 0)
printk("Current LLR = %d MLLR/s\n", *current_llr/1000000);
else
printk("LLR unknown\n");
if(*current_llr != 0)
printk("Current LLR = %d MLLR/s\n", *current_llr/1000000);
else
printk("LLR unknown\n");
if((*current_llr/1000)<80000)
fe_stid135_set_maxllr_rate(handle,demod_path,90);
else if(((*current_llr/1000)>80000)&&((*current_llr/1000)<113000))
fe_stid135_set_maxllr_rate(handle,demod_path,129);
else if(((*current_llr/1000)>113000)&&((*current_llr/1000)<162000))
fe_stid135_set_maxllr_rate(handle,demod_path,180);
else
fe_stid135_set_maxllr_rate(handle,demod_path,250);
} else printk("LLR cannot be computed because dummy PLF!!\n");
if((*current_llr/1000)<90000)
fe_stid135_set_maxllr_rate(handle,demod_path,90);
else if(((*current_llr/1000)>=90000)&&((*current_llr/1000)<129000))
fe_stid135_set_maxllr_rate(handle,demod_path,129);
else if(((*current_llr/1000)>=129000)&&((*current_llr/1000)<180000))
fe_stid135_set_maxllr_rate(handle,demod_path,180);
else
fe_stid135_set_maxllr_rate(handle,demod_path,250);
ChipGetField(pParams->handle_demod, FLD_FC8CODEW_DVBSX_DEMOD_HDEBITCFG0_SDEMAP_MAXLLRRATE(demod_path), &max_llr_allowed);
@@ -11651,25 +11663,17 @@ fe_lla_error_t get_current_llr(fe_stid135_handle_t handle,enum fe_stid135_demod
break;
case 1:
printk("Max LLR allowed = 180 MLLR/s\n");
if(*current_llr > 162000000)
if(*current_llr > 180000000)
printk("Careful! LLR may reach max allowed LLR!\n");
break;
case 2:
FE_STiD135_GetMclkFreq(handle, (u32*)&(fld_value[0])) ;
printk("Max LLR allowed = %d MLLR/s\n", fld_value[0]);
FE_STiD135_GetMclkFreq(handle, (u32*)&(fld_value[0])) ;
printk("Max LLR allowed = %d MLLR/s\n", fld_value[0]/1000000);
if(*current_llr >fld_value[0]/10*9)
printk("Careful! LLR may reach max allowed LLR!\n");
break;
case 3:
printk("Max LLR allowed = 90 MLLR/s\n");
if(*current_llr > 81000000 )
printk("Careful! LLR may reach max allowed LLR!\n");
break;
default:
printk("Unknown max LLR\n");