mirror of
https://github.com/LibreELEC/LibreELEC.tv
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63 lines
2.4 KiB
Diff
63 lines
2.4 KiB
Diff
diff -Naur linux-3.7.2/drivers/media/dvb-frontends/stb0899_drv.c linux-3.7.2.patch/drivers/media/dvb-frontends/stb0899_drv.c
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--- linux-3.7.2/drivers/media/dvb-frontends/stb0899_drv.c 2013-01-11 18:19:28.000000000 +0100
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+++ linux-3.7.2.patch/drivers/media/dvb-frontends/stb0899_drv.c 2013-01-16 10:33:10.323380937 +0100
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@@ -971,6 +971,16 @@
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*strength = stb0899_table_lookup(stb0899_dvbsrf_tab, ARRAY_SIZE(stb0899_dvbsrf_tab) - 1, val);
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*strength += 750;
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+
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+ const int MIN_STRENGTH_DVBS = 0;
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+ const int MAX_STRENGTH_DVBS = 680;
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+ if (*strength < MIN_STRENGTH_DVBS)
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+ *strength = 0;
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+ else if(*strength > MAX_STRENGTH_DVBS)
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+ *strength = 0xFFFF;
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+ else
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+ *strength = (*strength - MIN_STRENGTH_DVBS) * 0xFFFF / (MAX_STRENGTH_DVBS - MIN_STRENGTH_DVBS);
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+
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dprintk(state->verbose, FE_DEBUG, 1, "AGCIQVALUE = 0x%02x, C = %d * 0.1 dBm",
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val & 0xff, *strength);
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}
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@@ -983,6 +993,7 @@
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*strength = stb0899_table_lookup(stb0899_dvbs2rf_tab, ARRAY_SIZE(stb0899_dvbs2rf_tab) - 1, val);
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*strength += 950;
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+ *strength = *strength << 4;
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dprintk(state->verbose, FE_DEBUG, 1, "IF_AGC_GAIN = 0x%04x, C = %d * 0.1 dBm",
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val & 0x3fff, *strength);
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}
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@@ -1016,6 +1027,16 @@
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val = MAKEWORD16(buf[0], buf[1]);
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*snr = stb0899_table_lookup(stb0899_cn_tab, ARRAY_SIZE(stb0899_cn_tab) - 1, val);
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+
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+ const int MIN_SNR_DVBS = 0;
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+ const int MAX_SNR_DVBS = 200;
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+ if (*snr < MIN_SNR_DVBS)
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+ *snr = 0;
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+ else if(*snr > MAX_SNR_DVBS)
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+ *snr = 0xFFFF;
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+ else
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+ *snr = (*snr - MIN_SNR_DVBS) * 0xFFFF / (MAX_SNR_DVBS - MIN_SNR_DVBS);
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+
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dprintk(state->verbose, FE_DEBUG, 1, "NIR = 0x%02x%02x = %u, C/N = %d * 0.1 dBm\n",
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buf[0], buf[1], val, *snr);
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}
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@@ -1040,6 +1061,16 @@
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val = (quantn - estn) / 10;
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}
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*snr = val;
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+
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+ const int MIN_SNR_DVBS2 = 10;
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+ const int MAX_SNR_DVBS2 = 70;
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+ if (*snr < MIN_SNR_DVBS2)
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+ *snr = 0;
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+ else if(*snr > MAX_SNR_DVBS2)
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+ *snr = 0xFFFF;
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+ else
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+ *snr = (*snr - MIN_SNR_DVBS2) * 0xFFFF / (MAX_SNR_DVBS2 - MIN_SNR_DVBS2);
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+
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dprintk(state->verbose, FE_DEBUG, 1, "Es/N0 quant = %d (%d) estimate = %u (%d), C/N = %d * 0.1 dBm",
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quant, quantn, est, estn, val);
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}
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