diff options
| author | Chuck Ritola <[email protected]> | 2021-12-31 03:53:27 +0000 |
|---|---|---|
| committer | Mauro Carvalho Chehab <[email protected]> | 2022-11-25 09:55:55 +0000 |
| commit | e6431a0c0d711af71a0628689463af4ec19c82f8 (patch) | |
| tree | 7792d60720e7de2fe650e3f582280cb8f7a5def1 /net/lapb/lapb_timer.c | |
| parent | b5411dd4d506c373d4957e0b6c1c8e822dc8e511 (diff) | |
media: dvb-frontends: a8293: fix LNB powerup failure in PCTV 461e
Fixes a8293 failure to raise LNB voltage in PCTV 461e DVB-S2 Stick
affecting multiple users over several years as found here:
http://www.linuxquestions.org/questions/linux-hardware-18/pctv-dvb-s2-stick-461e-not-feeding-lnb-4175529374/
https://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_DVB-S2_Stick_(461e)
https://github.com/OpenELEC/OpenELEC.tv/issues/3731
Caused by vIN undervoltage lockout (status register bit 7) when raising LNB to 18V.
Addressed by using the higher-precision voltages available on the a8293 to gradually
increase (slew) the voltage when voltage increases are requested.
Adds volt_slew_nanos_per_mv to a8293_platform_data struct for specifying slew rate.
If value is <1 or non-sane (>1600), the original no-slew version for a8293_set_voltage is used.
Link: https://lore.kernel.org/linux-media/[email protected]
[mchehab: fixed some coding style issues]
Signed-off-by: Chuck Ritola <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions