On Mon, Nov 14, 2011 at 05:45:12PM +0800, Takashi Iwai wrote: > At Sat, 12 Nov 2011 10:27:26 +0800, > Wu Fengguang wrote: > > > > (snip) > > > > > > > And I'm not sure whether HDMI audio is played > > > > > > > while DPMS is off. I haven't tested it. > > > > > > > > > > > > It will go silence on DPMS. I noticed this while doing long term HDMI > > > > > > audio playback tests. This should better be fixed in future on the > > > > > > graphics side. > > > > > > > > > > Hm, but I wonder what could be done alternatively. > > > > > Hopefully there is a register for video-only control... > > > > > > > > There may be some mode that can keep video off while still keep > > > > minimal signals to play HDMI sound? > > > > > > Let's hope :) > > > > Looks very possible, here is the clue of hardware support: > > > > TRANS_DP_CTL - Transcoder DisplayPort Control > > > > bit 26: Transcoder DP Audio Only Mode > > Good to know! But what about HDMI? I'm not sure.. There are no corresponding TRANS_HDMI_CTL registers... Thanks, Fengguang
