Hi!
I'm trying to switch on ZV audio on a Maestro 2E chip. According to the
Maestro data sheet it is Bit 15 in ESM_RING_BUS_CONTR_A
register (=0x36) that controls the I2S input which contain the ZV data
(I think).
However, I had no luck so far, I can see the ZV video (in xawtv) but
there is no audio. I added a module option for ZV to the
snd-card-es1968module and added this code to the snd_es1968_probe(...)
function in card-es1968.c:
/* Switch on ZV if module option snd_es1968_zvport = 1
Should really put this stuff in a funtion. Even better -
add a setting in the mixer for switching on ZV.
*/
if (snd_es1968_zvport[dev] != 0) {
u16 reg;
reg = inw(chip->io_port + 0x36);
snd_printk("Switching on ZV audio (Ring Bus Control Reg, before =
%x",reg);
reg |= 0x8000; /* Set bit 15 = I2S on, which should switch on ZV
audio ?!*/
outw(reg, chip->io_port + 0x36);
reg = inw(chip->io_port + 0x36);
printk(", after = %x\n",reg);
}
Are there any other registers controlling the ZV input?
I'm using a Margi DVD to-go mpeg card as ZV source and
the laptop is equipped with a ATI 3D Rage LT Pro graphics
chip. Drivers can be found at www.linuxtv.org and GATOS.
Fredrik
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