Intel G45 8-Channel LPCM over HDMI

Intel G45 8-Channel LPCM over HDMI

[Alexander Werner]

Hi,

I'm planning to build a linux-based, small sized PC for hearing aid  
acousticians.
It would be highly unfavorable, if the connection between Receiver and  
PC was
analog, because of the lower quality and the high number of cables.
I searched for a appropriate mainboard, and found the DG45FC, which  
fits my needs
perfectly, apart from the missing audio over HDMI support.
Is there any plan to support multichannel LPCM output over HDMI on the  
Intel G45
platform?
If not, is there anyone willing to implement HDMI support for the G45  
chipset if
I donate the needed hardware (permanently)?
But if there's no chance to implement it in the near future, has  
anyone experience
with an onboard chipset with multichannel LPCM over HDMI and ALSA  
support?

Thanks,

Alexander Werner

Re: Intel G45 8-Channel LPCM over HDMI

[Vedran Miletić]

I'm pretty confident it doesn't work yet, but it's being developed as
we speak. Look at threads:
* Intel dg45id motherboard - ICH10 HD audio issues --> mATX, but very
similar board
* [ANNOUNCE] patch for INTEL HDMI codec --> unfortunately, I don't
believe it was checked in yet

BTW, those G45 boards are sweet :) But way overpriced IMHO :(

2008/11/2 Alexander Werner <alexander.werner@lambda-audiosystems.de>:
> Hi,
>
> I'm planning to build a linux-based, small sized PC for hearing aid
> acousticians.
> It would be highly unfavorable, if the connection between Receiver and
> PC was
> analog, because of the lower quality and the high number of cables.
> I searched for a appropriate mainboard, and found the DG45FC, which
> fits my needs
> perfectly, apart from the missing audio over HDMI support.
> Is there any plan to support multichannel LPCM output over HDMI on the
> Intel G45
> platform?
> If not, is there anyone willing to implement HDMI support for the G45
> chipset if
> I donate the needed hardware (permanently)?
> But if there's no chance to implement it in the near future, has
> anyone experience
> with an onboard chipset with multichannel LPCM over HDMI and ALSA
> support?
>
> Thanks,
>
> Alexander Werner
>
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>



-- 
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Re: Intel G45 8-Channel LPCM over HDMI

[Alexander Werner]

> I'm pretty confident it doesn't work yet, but it's being developed as
> we speak. Look at threads:
> * Intel dg45id motherboard - ICH10 HD audio issues --> mATX, but very
> similar board
> * [ANNOUNCE] patch for INTEL HDMI codec --> unfortunately, I don't
> believe it was checked in yet
Oops, i missed these threads completely. Looks great, though :)
I'll try to test the patch as soon as I can, what may take some time,  
as I bricked my board today and have to wait for a replacement :(

> BTW, those G45 boards are sweet :) But way overpriced IMHO :(
Jepp, they are sweet and overpriced, but the alternative solution  
needs an external soundcard and/or graphics card. This would consume  
more space and money.

Re: Intel G45 8-Channel LPCM over HDMI

[Takashi Iwai]

At Sun, 2 Nov 2008 15:16:49 +0100,
Alexander Werner wrote:
> 
> Hi,
> 
> I'm planning to build a linux-based, small sized PC for hearing aid  
> acousticians.
> It would be highly unfavorable, if the connection between Receiver and  
> PC was
> analog, because of the lower quality and the high number of cables.
> I searched for a appropriate mainboard, and found the DG45FC, which  
> fits my needs
> perfectly, apart from the missing audio over HDMI support.
> Is there any plan to support multichannel LPCM output over HDMI on the  
> Intel G45
> platform?

Yes.  Now waiting for the updated patch from Intel guys, hopefully it'll
be available soon later.


Takashi

Re: Intel G45 8-Channel LPCM over HDMI

[Vedran Miletić]

How about GeForce 8200 and nVIDIA HDMI as an alternative? (Perhaps
even new 9300 or something for Intel. Don't know much about that,
sorry.) There is even one ITX (made by Jetway), and lots of mATX. Much
cheaper than G45, and I believe that it supports 8ch LPCM. Not sure if
it supports that on Linux, but there was a lot of work on that topic
recently.

2008/11/2 Alexander Werner <alexander.werner@lambda-audiosystems.de>:
>> I'm pretty confident it doesn't work yet, but it's being developed as
>> we speak. Look at threads:
>> * Intel dg45id motherboard - ICH10 HD audio issues --> mATX, but very
>> similar board
>> * [ANNOUNCE] patch for INTEL HDMI codec --> unfortunately, I don't
>> believe it was checked in yet
>
> Oops, i missed these threads completely. Looks great, though :)
> I'll try to test the patch as soon as I can, what may take some time, as I
> bricked my board today and have to wait for a replacement :(
>
>> BTW, those G45 boards are sweet :) But way overpriced IMHO :(
>
> Jepp, they are sweet and overpriced, but the alternative solution needs an
> external soundcard and/or graphics card. This would consume more space and
> money.
>



-- 
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Re: Intel G45 8-Channel LPCM over HDMI

[Wu Fengguang]

On Mon, Nov 03, 2008 at 08:05:54AM +0100, Takashi Iwai wrote:
> At Sun, 2 Nov 2008 15:16:49 +0100,
> Alexander Werner wrote:
> > 
> > Hi,
> > 
> > I'm planning to build a linux-based, small sized PC for hearing aid  
> > acousticians.
> > It would be highly unfavorable, if the connection between Receiver and  
> > PC was
> > analog, because of the lower quality and the high number of cables.
> > I searched for a appropriate mainboard, and found the DG45FC, which  
> > fits my needs
> > perfectly, apart from the missing audio over HDMI support.
> > Is there any plan to support multichannel LPCM output over HDMI on the  
> > Intel G45
> > platform?
> 
> Yes.  Now waiting for the updated patch from Intel guys, hopefully it'll
> be available soon later.

It's ready now!

We did a lot of code refactor, testing and bug fixes in the last ten
days, and now it's ready for release :-)

Note that X.org intel video patches are also necessary for HDMI sound output.

However our 3 HDMI monitors have only 2-channel audio support, so
8-channel LPCM audio may not work for now.

Thank you,
Fengguang

Re: Intel G45 8-Channel LPCM over HDMI

[Alexander Werner]

> It's ready now!
>
> We did a lot of code refactor, testing and bug fixes in the last ten
> days, and now it's ready for release :-)
>
> Note that X.org intel video patches are also necessary for HDMI  
> sound output.
>
> However our 3 HDMI monitors have only 2-channel audio support, so
> 8-channel LPCM audio may not work for now.
>
> Thank you,
> Fengguang
>
That's great news! I'll test the patch as soon as my replacement board  
arrives.

Thanks,
Alexander

Re: Intel G45 8-Channel LPCM over HDMI

[Wu, Fengguang]

On Tue, Nov 04, 2008 at 10:36:35PM +0800, Alexander Werner wrote:
> > It's ready now!
> >
> > We did a lot of code refactor, testing and bug fixes in the last ten
> > days, and now it's ready for release :-)
> >
> > Note that X.org intel video patches are also necessary for HDMI  
> > sound output.
> >
> > However our 3 HDMI monitors have only 2-channel audio support, so
> > 8-channel LPCM audio may not work for now.
> >
> > Thank you,
> > Fengguang
> >
> That's great news! I'll test the patch as soon as my replacement board  
> arrives.

Thank you. The G45 HDMI audio can be enabled by the submitted ALSA
kernel patch together with this X.org intel driver patch:

Cheers,
Fengguang
---

[PATCH] enable HDMI audio output

Set the SDVO_AUDIO_ENABLE bit to enable audio output for
        - integrated HDMI (e.g. G45)
        - SDVO HDMI (e.g. G35)

Signed-off-by: Wu Fengguang <wfg@linux.intel.com>
Signed-off-by: Ma Ling <ling.ma@intel.com>
---
 src/i810_reg.h  |    1 +
 src/i830_hdmi.c |    1 +
 src/i830_sdvo.c |   10 ++++++----
 3 files changed, 8 insertions(+), 4 deletions(-)

--- xf86-video-intel.orig/src/i810_reg.h
+++ xf86-video-intel/src/i810_reg.h
@@ -1281,6 +1281,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN
 /** Requird for HDMI operation */
 #define SDVO_NULL_PACKETS_DURING_VSYNC		(1 << 9)
 #define SDVO_BORDER_ENABLE			(1 << 7)
+#define SDVO_AUDIO_ENABLE			(1 << 6)
 /** New with 965, default is to be set */
 #define SDVO_VSYNC_ACTIVE_HIGH			(1 << 4)
 /** New with 965, default is to be set */
--- xf86-video-intel.orig/src/i830_hdmi.c
+++ xf86-video-intel/src/i830_hdmi.c
@@ -75,6 +75,7 @@ i830_hdmi_mode_set(xf86OutputPtr output,
     uint32_t sdvox;
 
     sdvox = SDVO_ENCODING_HDMI |
+	SDVO_AUDIO_ENABLE |
 	SDVO_BORDER_ENABLE |
 	SDVO_VSYNC_ACTIVE_HIGH |
 	SDVO_HSYNC_ACTIVE_HIGH;
--- xf86-video-intel.orig/src/i830_sdvo.c
+++ xf86-video-intel/src/i830_sdvo.c
@@ -1017,7 +1017,7 @@ i830_sdvo_mode_set(xf86OutputPtr output,
     struct i830_sdvo_priv   *dev_priv = intel_output->dev_priv;
     xf86CrtcPtr	    crtc = output->crtc;
     I830CrtcPrivatePtr	    intel_crtc = crtc->driver_private;
-    uint32_t sdvox;
+    uint32_t sdvox = 0;
     int sdvo_pixel_multiply;
     struct i830_sdvo_in_out_map in_out;
     struct i830_sdvo_dtd input_dtd;
@@ -1039,8 +1039,10 @@ i830_sdvo_mode_set(xf86OutputPtr output,
 			&in_out, sizeof(in_out));
     status = i830_sdvo_read_response(output, NULL, 0);
 
-    if (dev_priv->is_hdmi)
+    if (dev_priv->is_hdmi){
 	i830_sdvo_set_avi_infoframe(output, mode);
+	sdvox |= SDVO_AUDIO_ENABLE;
+    }
 
     i830_sdvo_get_dtd_from_mode(&input_dtd, mode);
 
@@ -1088,11 +1090,11 @@ i830_sdvo_mode_set(xf86OutputPtr output,
 
     /* Set the SDVO control regs. */
     if (IS_I965G(pI830)) {
-	sdvox = SDVO_BORDER_ENABLE |
+	sdvox |= SDVO_BORDER_ENABLE |
 		SDVO_VSYNC_ACTIVE_HIGH |
 		SDVO_HSYNC_ACTIVE_HIGH;
     } else {
-	sdvox = INREG(dev_priv->output_device);
+	sdvox |= INREG(dev_priv->output_device);
 	switch (dev_priv->output_device) {
 	case SDVOB:
 	    sdvox &= SDVOB_PRESERVE_MASK;

Re: Intel G45 8-Channel LPCM over HDMI

[Wang, Zhenyu Z]

[-- Attachment #1.1: Type: text/plain, Size: 3861 bytes --]

On 2008.11.05 12:46:25 +0800, Wu, Fengguang wrote:
> On Tue, Nov 04, 2008 at 10:36:35PM +0800, Alexander Werner wrote:
> > > It's ready now!
> > >
> > > We did a lot of code refactor, testing and bug fixes in the last ten
> > > days, and now it's ready for release :-)
> > >
> > > Note that X.org intel video patches are also necessary for HDMI  
> > > sound output.
> > >
> > > However our 3 HDMI monitors have only 2-channel audio support, so
> > > 8-channel LPCM audio may not work for now.
> > >
> > > Thank you,
> > > Fengguang
> > >
> > That's great news! I'll test the patch as soon as my replacement board  
> > arrives.
> 
> Thank you. The G45 HDMI audio can be enabled by the submitted ALSA
> kernel patch together with this X.org intel driver patch:
> 

Looks mostly fine to me. But we can only enable HDMI audio
to one port at one time, so should we handle that case in two HDMI
ports case? And note that as DVI is compatible with HDMI, we've seen
many boards that using HDMI port for DVI output. So we might also check
in that case to not enable audio (recent added xserver xf86MonitorIsHDMI()
API might help here). 

> ---
> 
> [PATCH] enable HDMI audio output
> 
> Set the SDVO_AUDIO_ENABLE bit to enable audio output for
>         - integrated HDMI (e.g. G45)
>         - SDVO HDMI (e.g. G35)
> 
> Signed-off-by: Wu Fengguang <wfg@linux.intel.com>
> Signed-off-by: Ma Ling <ling.ma@intel.com>
> ---
>  src/i810_reg.h  |    1 +
>  src/i830_hdmi.c |    1 +
>  src/i830_sdvo.c |   10 ++++++----
>  3 files changed, 8 insertions(+), 4 deletions(-)
> 
> --- xf86-video-intel.orig/src/i810_reg.h
> +++ xf86-video-intel/src/i810_reg.h
> @@ -1281,6 +1281,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN
>  /** Requird for HDMI operation */
>  #define SDVO_NULL_PACKETS_DURING_VSYNC		(1 << 9)
>  #define SDVO_BORDER_ENABLE			(1 << 7)
> +#define SDVO_AUDIO_ENABLE			(1 << 6)
>  /** New with 965, default is to be set */
>  #define SDVO_VSYNC_ACTIVE_HIGH			(1 << 4)
>  /** New with 965, default is to be set */
> --- xf86-video-intel.orig/src/i830_hdmi.c
> +++ xf86-video-intel/src/i830_hdmi.c
> @@ -75,6 +75,7 @@ i830_hdmi_mode_set(xf86OutputPtr output,
>      uint32_t sdvox;
>  
>      sdvox = SDVO_ENCODING_HDMI |
> +	SDVO_AUDIO_ENABLE |
>  	SDVO_BORDER_ENABLE |
>  	SDVO_VSYNC_ACTIVE_HIGH |
>  	SDVO_HSYNC_ACTIVE_HIGH;
> --- xf86-video-intel.orig/src/i830_sdvo.c
> +++ xf86-video-intel/src/i830_sdvo.c
> @@ -1017,7 +1017,7 @@ i830_sdvo_mode_set(xf86OutputPtr output,
>      struct i830_sdvo_priv   *dev_priv = intel_output->dev_priv;
>      xf86CrtcPtr	    crtc = output->crtc;
>      I830CrtcPrivatePtr	    intel_crtc = crtc->driver_private;
> -    uint32_t sdvox;
> +    uint32_t sdvox = 0;
>      int sdvo_pixel_multiply;
>      struct i830_sdvo_in_out_map in_out;
>      struct i830_sdvo_dtd input_dtd;
> @@ -1039,8 +1039,10 @@ i830_sdvo_mode_set(xf86OutputPtr output,
>  			&in_out, sizeof(in_out));
>      status = i830_sdvo_read_response(output, NULL, 0);
>  
> -    if (dev_priv->is_hdmi)
> +    if (dev_priv->is_hdmi){
>  	i830_sdvo_set_avi_infoframe(output, mode);
> +	sdvox |= SDVO_AUDIO_ENABLE;
> +    }
>  
>      i830_sdvo_get_dtd_from_mode(&input_dtd, mode);
>  
> @@ -1088,11 +1090,11 @@ i830_sdvo_mode_set(xf86OutputPtr output,
>  
>      /* Set the SDVO control regs. */
>      if (IS_I965G(pI830)) {
> -	sdvox = SDVO_BORDER_ENABLE |
> +	sdvox |= SDVO_BORDER_ENABLE |
>  		SDVO_VSYNC_ACTIVE_HIGH |
>  		SDVO_HSYNC_ACTIVE_HIGH;
>      } else {
> -	sdvox = INREG(dev_priv->output_device);
> +	sdvox |= INREG(dev_priv->output_device);
>  	switch (dev_priv->output_device) {
>  	case SDVOB:
>  	    sdvox &= SDVOB_PRESERVE_MASK;

-- 
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$gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827

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Re: Intel G45 8-Channel LPCM over HDMI

[adelias]

Vedran Miletić <rivanvx <at> gmail.com> writes:

> 
> How about GeForce 8200 and nVIDIA HDMI as an alternative? (Perhaps
> even new 9300 or something for Intel. Don't know much about that,
> sorry.) There is even one ITX (made by Jetway), and lots of mATX. Much
> cheaper than G45, and I believe that it supports 8ch LPCM. Not sure if
> it supports that on Linux, but there was a lot of work on that topic
> recently.

> 

What is the current status on multichannel LPCM over HDMI on the G45? With my
DG45FC I can only manage to send the L/R channels to my Onkyo 707.



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Re: Intel G45 8-Channel LPCM over HDMI

[Wu Fengguang]

On Wed, Nov 18, 2009 at 12:41:46PM +0000, adelias wrote:
> Vedran Miletić <rivanvx <at> gmail.com> writes:
> 
> > 
> > How about GeForce 8200 and nVIDIA HDMI as an alternative? (Perhaps
> > even new 9300 or something for Intel. Don't know much about that,
> > sorry.) There is even one ITX (made by Jetway), and lots of mATX. Much
> > cheaper than G45, and I believe that it supports 8ch LPCM. Not sure if
> > it supports that on Linux, but there was a lot of work on that topic
> > recently.
> 
> > 
> 
> What is the current status on multichannel LPCM over HDMI on the G45? With my
> DG45FC I can only manage to send the L/R channels to my Onkyo 707.

That's interesting - it should work. How about testing 8-channel audio
with
        speaker-test -t wav -c8

? What's your kernel version and dmesg?

Thanks,
Fengguang
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