2011/6/20 Antti Palosaari <crope@xxxxxx>: > On 06/21/2011 12:25 AM, Antti Palosaari wrote: >> >> On 06/21/2011 12:20 AM, Rune Evjen wrote: >>> >>> 2011/6/20 Antti Palosaari<crope@xxxxxx>: >>>> >>>> LNA is controlled by demod GPIO line. I don't remember if it is on or >>>> off >>>> for DVB-C currently. Look em28xx-dvb.c file, you can disable or >>>> enable it >>>> from there (needs re-compiling driver). >>>> >>>> I also saw BER counter running some muxes during development, but I >>>> think >>>> all channels I have are still working. And I didn't even have time to >>>> optimal parameters for tuner / demod. I will try to examine those >>>> later... >>>> >>> Thank you Antti, >>> >>> I will test with lna disabled in the em28xx-dvb module >>> >>> In line 349 of the code, I see this: >>> /* enable LNA for DVB-T2 and DVB-C */ >>> .gpio_dvbt2[0] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | CXD2820R_GPIO_L, >>> .gpio_dvbc[0] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | CXD2820R_GPIO_L, >>> >>> I suspect I should modify line 351, what should it be changed to ? >> >> Remove corresponding line (.gpio_dvbc[0]). > > Or change CXD2820R_GPIO_L => CXD2820R_GPIO_H. Have to check that too, I > suspect removing it leaves it Hi-Z (which could result same). > > Thank you Antti, I just wanted to report back on the LNA issue. I compiled and tested with line 351 commented out, and with debug enabled for em28xx-dvb and cxd2820r, and got some errors in syslog [1]. I have now tested the following: a. drivers from media_build, w/o debug option on -> I am able to watch QAM-64 channels, but not QAM-256 channels (distorted picture and sound) b. drivers from media_build, with debug option on -> No locks on any channel c. Modified em28xx-dvb (line 351 commented out), -> I am able to watch QAM-64 channels with quite a lot of artifacts, but not QAM-256 channels. Scanning gives error as described in [1] Thank you for your assistance so far! Best regards, Rune [1] syslog output when scanning Jun 21 00:45:46 server kernel: [ 397.784043] cxd2820r: cxd2820r_init: delsys=1 Jun 21 00:45:46 server kernel: [ 397.784051] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:46 server kernel: [ 397.787404] cxd2820r: cxd2820r_get_tune_settings: delsys=1 Jun 21 00:45:46 server kernel: [ 397.787411] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:46 server kernel: [ 397.787433] cxd2820r: cxd2820r_set_frontend: delsys=1 Jun 21 00:45:46 server kernel: [ 397.787438] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:46 server kernel: [ 397.787444] cxd2820r: cxd2820r_set_frontend_c: RF=354000000 SR=6950000 Jun 21 00:45:46 server kernel: [ 397.787449] cxd2820r: cxd2820r_gpio: delsys=1 Jun 21 00:45:46 server kernel: [ 397.987515] cxd2820r: cxd2820r_read_status: delsys=1 Jun 21 00:45:46 server kernel: [ 397.987523] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:46 server kernel: [ 397.988324] cxd2820r: cxd2820r_read_status_c: lock=05 5a Jun 21 00:45:46 server kernel: [ 398.007081] em28xx #0/2-dvb: URB packet 0, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:46 server kernel: [ 398.007090] em28xx #0/2-dvb: URB packet 1, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:46 server kernel: [ 398.007097] em28xx #0/2-dvb: URB packet 2, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:46 server kernel: [ 398.007103] em28xx #0/2-dvb: URB packet 3, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:46 server kernel: [ 398.351148] cxd2820r: cxd2820r_read_status: delsys=1 Jun 21 00:45:46 server kernel: [ 398.351153] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:46 server kernel: [ 398.351998] cxd2820r: cxd2820r_read_status_c: lock=05 5a Jun 21 00:45:46 server kernel: [ 398.352006] cxd2820r: cxd2820r_get_frontend: delsys=1 Jun 21 00:45:46 server kernel: [ 398.352010] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:46 server kernel: [ 398.359552] cxd2820r: cxd2820r_get_tune_settings: delsys=1 Jun 21 00:45:46 server kernel: [ 398.359557] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:46 server kernel: [ 398.359576] cxd2820r: cxd2820r_set_frontend: delsys=1 Jun 21 00:45:46 server kernel: [ 398.359580] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:46 server kernel: [ 398.359586] cxd2820r: cxd2820r_set_frontend_c: RF=362000000 SR=6950000 Jun 21 00:45:46 server kernel: [ 398.359591] cxd2820r: cxd2820r_gpio: delsys=1 Jun 21 00:45:47 server kernel: [ 398.559650] cxd2820r: cxd2820r_read_status: delsys=1 Jun 21 00:45:47 server kernel: [ 398.559657] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:47 server kernel: [ 398.560510] cxd2820r: cxd2820r_read_status_c: lock=05 5a Jun 21 00:45:47 server kernel: [ 398.579142] em28xx #0/2-dvb: URB packet 0, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:47 server kernel: [ 398.579152] em28xx #0/2-dvb: URB packet 1, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:47 server kernel: [ 398.921283] cxd2820r: cxd2820r_read_status: delsys=1 Jun 21 00:45:47 server kernel: [ 398.921290] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:47 server kernel: [ 398.922051] cxd2820r: cxd2820r_read_status_c: lock=05 5a Jun 21 00:45:47 server kernel: [ 398.922056] cxd2820r: cxd2820r_get_frontend: delsys=1 Jun 21 00:45:47 server kernel: [ 398.922060] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:47 server kernel: [ 398.931623] cxd2820r: cxd2820r_get_tune_settings: delsys=1 Jun 21 00:45:47 server kernel: [ 398.931628] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:47 server kernel: [ 398.931680] cxd2820r: cxd2820r_set_frontend: delsys=1 Jun 21 00:45:47 server kernel: [ 398.931684] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:47 server kernel: [ 398.931690] cxd2820r: cxd2820r_set_frontend_c: RF=370000000 SR=6950000 Jun 21 00:45:47 server kernel: [ 398.931695] cxd2820r: cxd2820r_gpio: delsys=1 Jun 21 00:45:47 server kernel: [ 399.131713] cxd2820r: cxd2820r_read_status: delsys=1 Jun 21 00:45:47 server kernel: [ 399.131718] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:47 server kernel: [ 399.132572] cxd2820r: cxd2820r_read_status_c: lock=05 5a Jun 21 00:45:47 server kernel: [ 399.151203] em28xx #0/2-dvb: URB packet 0, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:47 server kernel: [ 399.151212] em28xx #0/2-dvb: URB packet 1, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:48 server kernel: [ 399.491277] cxd2820r: cxd2820r_read_status: delsys=1 Jun 21 00:45:48 server kernel: [ 399.491283] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:48 server kernel: [ 399.492114] cxd2820r: cxd2820r_read_status_c: lock=05 5a Jun 21 00:45:48 server kernel: [ 399.492120] cxd2820r: cxd2820r_get_frontend: delsys=1 Jun 21 00:45:48 server kernel: [ 399.492124] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:48 server kernel: [ 399.663569] cxd2820r: cxd2820r_get_tune_settings: delsys=1 Jun 21 00:45:48 server kernel: [ 399.663574] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:48 server kernel: [ 399.663604] cxd2820r: cxd2820r_set_frontend: delsys=1 Jun 21 00:45:48 server kernel: [ 399.663611] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:48 server kernel: [ 399.663617] cxd2820r: cxd2820r_set_frontend_c: RF=378000000 SR=6950000 Jun 21 00:45:48 server kernel: [ 399.663622] cxd2820r: cxd2820r_gpio: delsys=1 Jun 21 00:45:48 server kernel: [ 399.863666] cxd2820r: cxd2820r_read_status: delsys=1 Jun 21 00:45:48 server kernel: [ 399.863672] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:48 server kernel: [ 399.864528] cxd2820r: cxd2820r_read_status_c: lock=05 5a Jun 21 00:45:48 server kernel: [ 399.883278] em28xx #0/2-dvb: URB packet 0, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:48 server kernel: [ 399.883287] em28xx #0/2-dvb: URB packet 1, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:48 server kernel: [ 399.883294] em28xx #0/2-dvb: URB packet 2, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:48 server kernel: [ 399.883300] em28xx #0/2-dvb: URB packet 3, status -71 [Bit-stuff error (bad cable?)]. Jun 21 00:45:48 server kernel: [ 400.221282] cxd2820r: cxd2820r_read_status: delsys=1 Jun 21 00:45:48 server kernel: [ 400.221289] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:48 server kernel: [ 400.222069] cxd2820r: cxd2820r_read_status_c: lock=05 5a Jun 21 00:45:48 server kernel: [ 400.222075] cxd2820r: cxd2820r_get_frontend: delsys=1 Jun 21 00:45:48 server kernel: [ 400.222079] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:49 server kernel: [ 400.730765] cxd2820r: cxd2820r_sleep: delsys=1 Jun 21 00:45:49 server kernel: [ 400.730772] cxd2820r: cxd2820r_lock: active_fe=1 Jun 21 00:45:49 server kernel: [ 400.730776] cxd2820r: cxd2820r_sleep_c Jun 21 00:45:49 server kernel: [ 400.732621] cxd2820r: cxd2820r_unlock: active_fe=1 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
