[Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M.

2017-05-25 Thread Quanxian Wang
According to the bspec, when set N/M, should disable and enable transcoder which attaching DP audio. However with that implementation will affect performance more. But with current implementation, KBL could not work with defined N/M. By default, KBL will use automatic N/M. Signed-off-by: Quanxian

Re: [Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M.

2017-05-26 Thread Jani Nikula
On Fri, 26 May 2017, Quanxian Wang wrote: > According to the bspec, when set N/M, should disable > and enable transcoder which attaching DP audio. However > with that implementation will affect performance more. > > But with current implementation, KBL could not work with defined N/M. > By default

Re: [Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M.

2017-05-26 Thread Wang, Quanxian
Hi, Jani Thanks for your comment. My comment below. -Original Message- From: Jani Nikula [mailto:jani.nik...@linux.intel.com] Sent: Friday, May 26, 2017 4:31 PM To: Wang, Quanxian ; intel-gfx@lists.freedesktop.org Cc: Yang, Libin ; Wang, Quanxian Subject: Re: [PATCH] Defined NM doesn't

Re: [Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M.

2017-05-26 Thread Jani Nikula
On Fri, 26 May 2017, "Wang, Quanxian" wrote: > [Wang, Quanxian] in Ubuntu 17.04, we do audio testing on KBL/SKL/APL > and more, the audio doesn't work on KBL specially, and other platform > works fine. Even if with latest upstream kernel, but it works on 4.8 > kernel. Therefore It is a regression

Re: [Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M.

2017-05-26 Thread Wang, Quanxian
"The patch is probably fine. But I can't invent an explanation if I don't know what the problem is." @Jani @libin, is it possible for you to help contact Intel graphics hardware design engineer to get the reason why M/N doesn't work as you implemented in kernel code in Kabylake platform? I don'

Re: [Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M.

2017-05-29 Thread Jani Nikula
On Fri, 26 May 2017, "Wang, Quanxian" wrote: > "The patch is probably fine. But I can't invent an explanation if I > don't know what the problem is." > > @Jani @libin, is it possible for you to help contact Intel graphics > hardware design engineer to get the reason why M/N doesn't work as you >

Re: [Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M.

2017-05-30 Thread Wang, Quanxian
-Original Message- From: Jani Nikula [mailto:jani.nik...@linux.intel.com] Sent: Monday, May 29, 2017 4:29 PM To: Wang, Quanxian ; intel-gfx@lists.freedesktop.org Cc: Yang, Libin Subject: RE: [PATCH] Defined NM doesn't work on KBL and uses automatic N/M. On Fri, 26 May 2017, "Wang, Qua

Re: [Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M.

2017-12-07 Thread Wang, Quanxian
] On Behalf Of Wang, Quanxian Sent: Wednesday, May 31, 2017 11:21 AM To: Jani Nikula ; intel-gfx@lists.freedesktop.org Subject: Re: [Intel-gfx] [PATCH] Defined NM doesn't work on KBL and uses automatic N/M. -Original Message- From: Jani Nikula [mailto:jani.nik...@linux.intel.com]