• Mauro Carvalho Chehab's avatar
    [media] saa7134: Kworld SBTVD: make both analog and digital to work · ecb71d26
    Mauro Carvalho Chehab authored
    There are some weird bugs at tda8290/tda18271 initialization, as it
    insits do do analog initialization during DVB frontend attach:
    
    DVB: registering new adapter (saa7133[0])
    DVB: registering adapter 0 frontend 0 (Fujitsu mb86A20s)...
    mb86a20s: mb86a20s_initfe
    tda18271_write_regs: [2-0060|M] ERROR: idx = 0x5, len = 1, i2c_transfer returned: -5
    tda18271_init: [2-0060|M] error -5 on line 830
    tda18271_tune: [2-0060|M] error -5 on line 908
    tda18271_write_regs
    tda18271_write_regs: [2-0060|M] ERROR: idx = 0x5, len = 1, i2c_transfer returned: -5
    tda18271c2_rf_tracking_filters_correction: [2-0060|M] error -5 on line 265
    tda18271_write_regs
    tda18271_write_regs: [2-0060|M] ERROR: idx = 0x25, len = 1, i2c_transfer returned: -5
    tda18271_channel_configuration: [2-0060|M] error -5 on line 119
    tda18271_set_analog_params: [2-0060|M] error -5 on line 1045
    tda18271_set_analog_params: [2-0060|M] error -5 on line 1045
    tda829x 2-004b: tda8295 not locked, no signal?
    tda829x 2-004b: tda8295_i2c_bridge: disable i2c gate
    tda829x 2-004b: tda8295 not locked, no signal?
    tda829x 2-004b: tda8295_i2c_bridge: disable i2c gate
    mb86a20s_i2c_writereg: writereg error (rc == -5, reg == 0x29, data == 0x33)
    mb86a20s: Init failed. Will try again later
    
    The problem is that mb86a20s is only visible if the analog part is disabled.
    
    However, due to a trick at mb86a20s, it will later initialize properly:
    
    mb86a20s: mb86a20s_initfe: Initialization succeded.
    
    This is hacky and ugly. However, I coldn't find any easy way to fix it.
    A proper fix would be to have a resource locking schema, used by both
    V4L and DVB parts that would block access to analog registers while
    digital registers are in use, but this will probably put tda829x into
    a dead lock.
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
    ecb71d26
saa7134-dvb.c 51.9 KB