16 Feb
2016
16 Feb
'16
9:16 a.m.
On Tue, 16 Feb 2016 03:00:26 +0100, Mark Brown wrote:
On Mon, Feb 15, 2016 at 11:31:48PM +0100, Takashi Iwai wrote:
Mark Brown wrote:
On Fri, Feb 12, 2016 at 07:46:03AM +0530, Subhransu S. Prusty wrote:
- vendor_param |= INTEL_EN_ALL_PIN_CVTS;
- vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
INTEL_SET_VENDOR_VERB, vendor_param);- if (vendor_param == -1)
return;+}
So to enable the pins we do a read? That seems... innovative. :/
It's a weird nature of HD-audio verb handling. While *_write() just sends the verb asynchronously, *_read() sends the verb, does sync and read-back the return value. But both read and write may handle the same verb.
The above one seems especially odd, we do the read and then essentially ignore the value (the difference in handling is nonexistant).
There is a difference -- it does sync.
I don't know whether the sync is mandatory in this case, though.
Takashi