diff options
| author | Gianluca Gennari <gennarone@gmail.com> | 2012-03-15 13:33:48 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-05-15 09:26:53 -0300 |
| commit | 38f0fe23dc3d3de08d2e187c42569356ba6b72bc (patch) | |
| tree | 846543bc7627100c4914206c4833bc89cb0219b7 /drivers | |
| parent | 626f95a3e1ee1a227bf447d60f98166b87ea7f8b (diff) | |
[media] em28xx-dvb: enable LNA for cxd2820r in DVB-T mode
Enable the LNA amplifier also for DVB-T (like for DVB-T2 and DVB-C);
this greatly improves reception of weak signals without affecting the reception
of the strong ones.
Experimental data (collected with the mipsel STB) on the weakest frequencies
available in my area:
LNA OFF:
MUX level BER picture
RAI mux 4 72% 32000 corrupted
TIMB 2 75% 14 OK
TVA Vicenza 68% 32000 corrupted
RAI mux 2 78% 14 OK
LNA ON:
MUX level BER picture
RAI mux 4 73% 1500 OK
TIMB 2 76% 0 OK
TVA Vicenza 69% 0 OK
RAI mux 2 79% 0 OK
Moreover, with LNA enabled, the PCTV 290e was able to pick up 2 new frequencies
matching the integrated tuner of my Panasonic G20 TV, which is really good.
Signed-off-by: Gianluca Gennari <gennarone@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-dvb.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/video/em28xx/em28xx-dvb.c b/drivers/media/video/em28xx/em28xx-dvb.c index 2d73ee2abf7..ea3810fa5a1 100644 --- a/drivers/media/video/em28xx/em28xx-dvb.c +++ b/drivers/media/video/em28xx/em28xx-dvb.c @@ -542,7 +542,8 @@ static struct cxd2820r_config em28xx_cxd2820r_config = { .i2c_address = (0xd8 >> 1), .ts_mode = CXD2820R_TS_SERIAL, - /* enable LNA for DVB-T2 and DVB-C */ + /* enable LNA for DVB-T, DVB-T2 and DVB-C */ + .gpio_dvbt[0] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | CXD2820R_GPIO_L, .gpio_dvbt2[0] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | CXD2820R_GPIO_L, .gpio_dvbc[0] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | CXD2820R_GPIO_L, }; |