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 | |
| parent | 626f95a3e1ee1a227bf447d60f98166b87ea7f8b (diff) | |
| download | linux-38f0fe23dc3d3de08d2e187c42569356ba6b72bc.tar.gz | |
[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>
| -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 2d73ee2abf7e..ea3810fa5a15 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, }; |