On 8 August 2011 20:50, Antti Palosaari <crope@xxxxxx> wrote: > On 08/06/2011 08:13 AM, Alistair Buxton wrote: >> On 6 August 2011 04:56, Alistair Buxton <a.j.buxton@xxxxxxxxx> wrote: >>> With the latest driver my card never gets a signal lock, not even >>> once. As before there are no error messages. It does always probe >>> correctly now though. >> >> I tracked this down to: >> >> http://git.linuxtv.org/anttip/media_tree.git/commit/e5d3e4f27f0cf71c29d12ce39752195d8994dea3 >> >> and to this specific change: >> >> @@ -459,21 +563,14 @@ static int rtl28xxu_power_ctrl(struct >> dvb_usb_device *d, int onoff) >> sys0 = sys0 & 0x0f; >> sys0 |= 0xe0; >> } else { >> - >> -#if 0 /* keep */ >> /* >> * FIXME: Use .fe_ioctl_override() to prevent demod >> - * IOCTLs in case of device is powered off. >> - * >> - * For now we cannot power off device because most FE IOCTLs >> - * can be performed only when device is powered. >> - * Using IOCTLs when device is powered off will result errors >> - * because register access to demod fails. >> + * IOCTLs in case of device is powered off. Or change >> + * RTL2830 demod not perform requestesd IOCTL & IO when sleep. >> */ >> gpio &= (~0x01); /* GPIO0 = 0 */ >> gpio |= 0x10; /* GPIO4 = 1 */ >> sys0 = sys0 & (~0xc0); >> -#endif >> } >> >> deb_info("%s: WR SYS0=%02x GPIO_OUT_VAL=%02x\n", __func__, sys0, gpio); >> >> >> Commenting those three lines makes the driver work again. Don't know >> yet if it will keep working for longer than a couple of days. > > I suspect it is tuner GPIO. It is not clear which GPIO pins are used for > tuner reset. I should find this out soon. Most likely MXL5005S tuner > reset have connected to different GPIO than MT2060 design I have. > > Could you test commenting out only gpio change to see if it helps? After a couple of days the card locked up again just like before. Are there more gpio bits I need to comment? The LED GPIO is definitely right. Also, is there a way to check the status of the GPIO from userspace, without recompiling the module? Like maybe with i2c-dev or something? -- Alistair Buxton a.j.buxton@xxxxxxxxx -- 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
