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authorGianluca Gennari <gennarone@gmail.com>2012-03-15 13:33:48 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-05-15 09:26:53 -0300
commit38f0fe23dc3d3de08d2e187c42569356ba6b72bc (patch)
tree846543bc7627100c4914206c4833bc89cb0219b7 /drivers
parent626f95a3e1ee1a227bf447d60f98166b87ea7f8b (diff)
downloadlinux-38f0fe23dc3d3de08d2e187c42569356ba6b72bc.tar.bz2
[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.c3
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,
};