[Mesa-dev] radeonsi external audio + powerconsumption

Christian König deathsimple at vodafone.de
Wed Mar 9 17:04:33 UTC 2016


The only of hand "hack" I can see is to open up an HDMI connector, 
shortcut the hot plug detection pin and then connect that as "output 
device" to the amplifier.

It should fix your issues with the hot plug detection. You most likely 
still won't get a valid EDID, but that can be overridden easily.

On the other hand what's the issue with connecting the PC Monitor to the 
amplifier using a HDMI->DVI cable?

Regards,
Christian.

Am 09.03.2016 um 17:44 schrieb Jarkko Korpi:
> Makes sense. I just broke my xrandr config that it doesnt work 
> correctly it happens from time to time and it's really irritating to 
> fix. What I just need is basically clone mode. But kde doesnt see 
> screens that are offline and if I put amplifier on, it shutdowns my pc 
> screen. Before I had an issue that I am on desktop, but most of the 
> working applications are on the other desktop. This was easier to fix, 
> mostly just opening and closing amplifier and it started to work 
> correctly.
>
> xrandr --verbose
> Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
> HDMI1 connected 1920x1080+0+0 (0x47) normal (normal left inverted 
> right x axis y axis) 531mm x 298mm
>         Identifier: 0x43
>         Timestamp:  307470
>         Subpixel:   unknown
>         Gamma:      1.0:1.0:1.0
>         Brightness: 1.0
>         Clones:
>         CRTC:       0
>         CRTCs:      0 1 2
>         Transform:  1.000000 0.000000 0.000000
>                     0.000000 1.000000 0.000000
>                     0.000000 0.000000 1.000000
>                    filter:
>         EDID:
>                 00ffffffffffff0009d1a77845540000
>                 1b18010380351e782eba45a159559d28
>                 0d5054a56b80810081c08180a9c0b300
>                 d1c001010101023a801871382d40582c
>                 4500132a2100001e000000ff00333745
>                 30323032323031390a20000000fd0032
>                 4c1e5311000a202020202020000000fc
>                 0042656e5120474c32343530480a006c
>         aspect ratio: Automatic
>                 supported: Automatic, 4:3, 16:9
>         Broadcast RGB: Automatic
>                 supported: Automatic, Full, Limited 16:235
>         audio: auto
>                 supported: force-dvi, off, auto, on
>   1920x1080 (0x47)  148.5MHz +HSync +VSync *current +preferred
>         h: width  1920 start 2008 end 2052 total 2200 skew    0 
> clock   67.5KHz
>         v: height 1080 start 1084 end 1089 total 1125 clock   60.0Hz
>   1680x1050 (0xc7)  119.0MHz +HSync -VSync
>         h: width  1680 start 1728 end 1760 total 1840 skew    0 
> clock   64.7KHz
>         v: height 1050 start 1053 end 1059 total 1080 clock   59.9Hz
>   1600x900 (0xc8)  108.0MHz +HSync +VSync
>         h: width  1600 start 1624 end 1704 total 1800 skew    0 
> clock   60.0KHz
>         v: height  900 start  901 end  904 total 1000 clock   60.0Hz
>   1280x1024 (0xc9)  135.0MHz +HSync +VSync
>         h: width  1280 start 1296 end 1440 total 1688 skew    0 
> clock   80.0KHz
>         v: height 1024 start 1025 end 1028 total 1066 clock   75.0Hz
>   1280x1024 (0xca)  108.0MHz +HSync +VSync
>         h: width  1280 start 1328 end 1440 total 1688 skew    0 
> clock   64.0KHz
>         v: height 1024 start 1025 end 1028 total 1066 clock   60.0Hz
>   1280x800 (0xcb)   71.0MHz +HSync -VSync
>         h: width  1280 start 1328 end 1360 total 1440 skew    0 
> clock   49.3KHz
>         v: height  800 start  803 end  809 total  823 clock   59.9Hz
>   1152x864 (0xcc)  108.0MHz +HSync +VSync
>         h: width  1152 start 1216 end 1344 total 1600 skew    0 
> clock   67.5KHz
>         v: height  864 start  865 end  868 total  900 clock   75.0Hz
>   1280x720 (0xcd)   74.2MHz +HSync +VSync
>         h: width  1280 start 1390 end 1430 total 1650 skew    0 
> clock   45.0KHz
>         v: height  720 start  725 end  730 total  750 clock   60.0Hz
>   1024x768 (0xce)   78.8MHz +HSync +VSync
>         h: width  1024 start 1040 end 1136 total 1312 skew    0 
> clock   60.1KHz
>         v: height  768 start  769 end  772 total  800 clock   75.1Hz
>   1024x768 (0xcf)   65.0MHz -HSync -VSync
>         h: width  1024 start 1048 end 1184 total 1344 skew    0 
> clock   48.4KHz
>         v: height  768 start  771 end  777 total  806 clock   60.0Hz
>   832x624 (0xd0)   57.3MHz -HSync -VSync
>         h: width   832 start  864 end  928 total 1152 skew    0 
> clock   49.7KHz
>         v: height  624 start  625 end  628 total  667 clock   74.6Hz
>   800x600 (0xd1)   49.5MHz +HSync +VSync
>         h: width   800 start  816 end  896 total 1056 skew    0 
> clock   46.9KHz
>         v: height  600 start  601 end  604 total  625 clock   75.0Hz
>   800x600 (0xd2)   40.0MHz +HSync +VSync
>         h: width   800 start  840 end  968 total 1056 skew    0 
> clock   37.9KHz
>         v: height  600 start  601 end  605 total  628 clock   60.3Hz
>   640x480 (0xd3)   31.5MHz -HSync -VSync
>         h: width   640 start  656 end  720 total  840 skew    0 
> clock   37.5KHz
>         v: height  480 start  481 end  484 total  500 clock   75.0Hz
>   640x480 (0xd4)   25.2MHz -HSync -VSync
>         h: width   640 start  656 end  752 total  800 skew    0 
> clock   31.5KHz
>         v: height  480 start  490 end  492 total  525 clock   60.0Hz
>   720x400 (0xd5)   28.3MHz -HSync +VSync
>         h: width   720 start  738 end  846 total  900 skew    0 
> clock   31.5KHz
>         v: height  400 start  412 end  414 total  449 clock   70.1Hz
> HDMI2 disconnected (normal left inverted right x axis y axis)
>         Identifier: 0x44
>         Timestamp:  307470
>         Subpixel:   unknown
>         Clones:
>         CRTCs:      0 1 2
>         Transform:  1.000000 0.000000 0.000000
>                     0.000000 1.000000 0.000000
>                     0.000000 0.000000 1.000000
>                    filter:
>         aspect ratio: Automatic
>                 supported: Automatic, 4:3, 16:9
>         Broadcast RGB: Automatic
>                 supported: Automatic, Full, Limited 16:235
>         audio: auto
>                 supported: force-dvi, off, auto, on
> VIRTUAL1 disconnected (normal left inverted right x axis y axis)
>         Identifier: 0x45
>         Timestamp:  307470
>         Subpixel:   no subpixels
>         Clones:
>         CRTCs:      3
>         Transform:  1.000000 0.000000 0.000000
>                     0.000000 1.000000 0.000000
>                     0.000000 0.000000 1.000000
>                    filter:
>
> ------------------------------------------------------------------------
> Subject: Re: [Mesa-dev] radeonsi external audio + powerconsumption
> To: jarkko_korpi at hotmail.com; mesa-dev at lists.freedesktop.org
> From: deathsimple at vodafone.de
> Date: Wed, 9 Mar 2016 17:38:08 +0100
>
> That configuration can't work correctly.
>
> With HDMI the audio data is interleaved in the video vertical and 
> horizontal sync periods. So if you don't have video you don't have any 
> way to submit audio either.
>
> What the driver properly does is providing a dummy video signal so 
> that audio can be transfered anyway. Most likely just a clone of the 
> desktop picture.
>
> Please provide you're xrandr --verbose output.
>
> Regards,
> Christian.
>
> Am 09.03.2016 um 17:31 schrieb Jarkko Korpi:
>
>     I have ati r9 290 I have been using external amplifier that puts
>     the sound into speakers. I have this connection using r9 290 -->
>     hdmi --> speakers
>     And dvi --> pc screen.
>
>     xrandr (that broke my config again) see this external amplifer as
>     a display which is it not. Kde/mint/upstream should fix this so it
>     would be more correct.
>
>     Hdmi channel is just sending audio data to amplifier. And it feels
>     like that ati is using more clock cycles to provide the picture
>     and the audio than it should.
>
>     Is there anyway to prevent this in future?
>
>
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>
>
>
>
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