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* HDMI CEC on ODROID-N2+
@ 2022-01-13 14:36 Stefan Agner
  2022-01-13 15:52 ` Neil Armstrong
  2022-01-15 10:02 ` (EXT) " Alexander Stein
  0 siblings, 2 replies; 7+ messages in thread
From: Stefan Agner @ 2022-01-13 14:36 UTC (permalink / raw)
  To: narmstrong, linux-amlogic, linux-media

Hi Neil,

I am trying to use HDMI CEC on ODROID-N2+ using Linux 5.10.91. However,
I was unsuccessful: As far as I can tell cec-client uses the right
device (I disabled CONFIG_DRM_DW_HDMI_CEC since my kernel is still
missing your patch "drm/meson: dw-hdmi: disable DW-HDMI CEC
sub-driver"). But communication won't work, and dmesg prints timeout
messages:

[   68.831253] cec-meson_g12a_ao_cec: message ff 84 20 00 06 timed out
[   71.134987] cec-meson_g12a_ao_cec: message ff 87 00 15 82 timed out
[   73.438826] cec-meson_g12a_ao_cec: message f0 timed out
[   75.742677] cec-meson_g12a_ao_cec: message f0 timed out
[   78.046555] cec-meson_g12a_ao_cec: message f0 timed out
[   80.350446] cec-meson_g12a_ao_cec: message f0 timed out
[   82.654358] cec-meson_g12a_ao_cec: message 11 timed out
[   84.958285] cec-meson_g12a_ao_cec: message 11 timed out
[   87.262194] cec-meson_g12a_ao_cec: message 11 timed out
[   89.566130] cec-meson_g12a_ao_cec: message 11 timed out

I did a quick test with CoreELEC which uses the 4.9 downstream kernel,
CEC seems to work there. So it does not seem to be my hardware setup.

A quick test with the latest Linux 5.16 shows the same errors.

Do you happen to have an idea? Do you know if HDMI CEC using upstream
kernels worked at one point on that particular platform?

--
Stefan

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^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: HDMI CEC on ODROID-N2+
  2022-01-13 14:36 HDMI CEC on ODROID-N2+ Stefan Agner
@ 2022-01-13 15:52 ` Neil Armstrong
  2022-01-15 10:02 ` (EXT) " Alexander Stein
  1 sibling, 0 replies; 7+ messages in thread
From: Neil Armstrong @ 2022-01-13 15:52 UTC (permalink / raw)
  To: Stefan Agner, linux-amlogic, linux-media

Hi,


On 13/01/2022 15:36, Stefan Agner wrote:
> Hi Neil,
> 
> I am trying to use HDMI CEC on ODROID-N2+ using Linux 5.10.91. However,
> I was unsuccessful: As far as I can tell cec-client uses the right
> device (I disabled CONFIG_DRM_DW_HDMI_CEC since my kernel is still
> missing your patch "drm/meson: dw-hdmi: disable DW-HDMI CEC
> sub-driver"). But communication won't work, and dmesg prints timeout
> messages:
> 
> [   68.831253] cec-meson_g12a_ao_cec: message ff 84 20 00 06 timed out
> [   71.134987] cec-meson_g12a_ao_cec: message ff 87 00 15 82 timed out
> [   73.438826] cec-meson_g12a_ao_cec: message f0 timed out
> [   75.742677] cec-meson_g12a_ao_cec: message f0 timed out
> [   78.046555] cec-meson_g12a_ao_cec: message f0 timed out
> [   80.350446] cec-meson_g12a_ao_cec: message f0 timed out
> [   82.654358] cec-meson_g12a_ao_cec: message 11 timed out
> [   84.958285] cec-meson_g12a_ao_cec: message 11 timed out
> [   87.262194] cec-meson_g12a_ao_cec: message 11 timed out
> [   89.566130] cec-meson_g12a_ao_cec: message 11 timed out
> 
> I did a quick test with CoreELEC which uses the 4.9 downstream kernel,
> CEC seems to work there. So it does not seem to be my hardware setup.
> 
> A quick test with the latest Linux 5.16 shows the same errors.
> 
> Do you happen to have an idea? Do you know if HDMI CEC using upstream
> kernels worked at one point on that particular platform?

I was reported it works on Yukawa 5.10 kernel, I'll have a check it still works.

Neil

> 
> --
> Stefan
> 


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^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: (EXT) HDMI CEC on ODROID-N2+
  2022-01-13 14:36 HDMI CEC on ODROID-N2+ Stefan Agner
  2022-01-13 15:52 ` Neil Armstrong
@ 2022-01-15 10:02 ` Alexander Stein
  2022-01-15 10:52   ` Stefan Agner
  1 sibling, 1 reply; 7+ messages in thread
From: Alexander Stein @ 2022-01-15 10:02 UTC (permalink / raw)
  To: Stefan Agner; +Cc: narmstrong, linux-amlogic, linux-media

Hi Stefan,

Am Donnerstag, 13. Januar 2022, 15:36:38 CET schrieb Stefan Agner:
> Hi Neil,
> 
> I am trying to use HDMI CEC on ODROID-N2+ using Linux 5.10.91. However,
> I was unsuccessful: As far as I can tell cec-client uses the right
> device (I disabled CONFIG_DRM_DW_HDMI_CEC since my kernel is still
> missing your patch "drm/meson: dw-hdmi: disable DW-HDMI CEC
> sub-driver"). But communication won't work, and dmesg prints timeout
> messages:
> 
> [   68.831253] cec-meson_g12a_ao_cec: message ff 84 20 00 06 timed out
> [   71.134987] cec-meson_g12a_ao_cec: message ff 87 00 15 82 timed out
> [   73.438826] cec-meson_g12a_ao_cec: message f0 timed out
> [   75.742677] cec-meson_g12a_ao_cec: message f0 timed out
> [   78.046555] cec-meson_g12a_ao_cec: message f0 timed out
> [   80.350446] cec-meson_g12a_ao_cec: message f0 timed out
> [   82.654358] cec-meson_g12a_ao_cec: message 11 timed out
> [   84.958285] cec-meson_g12a_ao_cec: message 11 timed out
> [   87.262194] cec-meson_g12a_ao_cec: message 11 timed out
> [   89.566130] cec-meson_g12a_ao_cec: message 11 timed out
> 
> I did a quick test with CoreELEC which uses the 4.9 downstream kernel,
> CEC seems to work there. So it does not seem to be my hardware setup.
> 
> A quick test with the latest Linux 5.16 shows the same errors.
> 
> Do you happen to have an idea? Do you know if HDMI CEC using upstream
> kernels worked at one point on that particular platform?

I'm using Arch Linux on my ODROID-n2 (non-plus) and HDMI CEC works as 
expected.
Currently I'm running a 5.15.13-1-aarch64-ARCH kernel. AFAICS the mentioned 
patch is mainline since v5.14. I can see my TV without issues. I have to add 
that not every cable is suitable for HDMI CEC, I have one where CEC does not 
work (in general).

HTH
Alexander
------
$ cec-ctl --playback
$ cec-ctl -S
Driver Info:
        Driver Name                : meson-ao-cec-g12a
        Adapter Name               : meson_g12a_ao_cec
        Capabilities               : 0x0000011e
                Logical Addresses
                Transmit
                Passthrough
                Remote Control Support
                Connector Info
        Driver version             : 5.15.13
        Available Logical Addresses: 4
        DRM Connector Info         : card 1, connector 32
        Physical Address           : 1.0.0.0
        Logical Address Mask       : 0x0010
        CEC Version                : 2.0
        Vendor ID                  : 0x000c03 (HDMI)
        OSD Name                   : 'Playback'
        Logical Addresses          : 1 (Allow RC Passthrough)

          Logical Address          : 4 (Playback Device 1)
            Primary Device Type    : Playback
            Logical Address Type   : Playback
            All Device Types       : Playback
            RC TV Profile          : None
            Device Features        :
                None

        System Information for device 0 (TV) from device 4 (Playback Device 
1):
                CEC Version                : 1.4
                Physical Address           : 0.0.0.0
                Primary Device Type        : TV
                Vendor ID                  : 0x080046 (Sony)
                OSD Name                   : 'TV'
                Power Status               : Standby

        Topology:

            0.0.0.0: TV
                1.0.0.0: Playback Device 1




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^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: (EXT) HDMI CEC on ODROID-N2+
  2022-01-15 10:02 ` (EXT) " Alexander Stein
@ 2022-01-15 10:52   ` Stefan Agner
  2022-01-15 13:28     ` Stefan Agner
  0 siblings, 1 reply; 7+ messages in thread
From: Stefan Agner @ 2022-01-15 10:52 UTC (permalink / raw)
  To: Alexander Stein; +Cc: narmstrong, linux-amlogic, linux-media

Hi Alexander,

On 2022-01-15 11:02, Alexander Stein wrote:
> Hi Stefan,
> 
> Am Donnerstag, 13. Januar 2022, 15:36:38 CET schrieb Stefan Agner:
>> Hi Neil,
>>
>> I am trying to use HDMI CEC on ODROID-N2+ using Linux 5.10.91. However,
>> I was unsuccessful: As far as I can tell cec-client uses the right
>> device (I disabled CONFIG_DRM_DW_HDMI_CEC since my kernel is still
>> missing your patch "drm/meson: dw-hdmi: disable DW-HDMI CEC
>> sub-driver"). But communication won't work, and dmesg prints timeout
>> messages:
>>
>> [   68.831253] cec-meson_g12a_ao_cec: message ff 84 20 00 06 timed out
>> [   71.134987] cec-meson_g12a_ao_cec: message ff 87 00 15 82 timed out
>> [   73.438826] cec-meson_g12a_ao_cec: message f0 timed out
>> [   75.742677] cec-meson_g12a_ao_cec: message f0 timed out
>> [   78.046555] cec-meson_g12a_ao_cec: message f0 timed out
>> [   80.350446] cec-meson_g12a_ao_cec: message f0 timed out
>> [   82.654358] cec-meson_g12a_ao_cec: message 11 timed out
>> [   84.958285] cec-meson_g12a_ao_cec: message 11 timed out
>> [   87.262194] cec-meson_g12a_ao_cec: message 11 timed out
>> [   89.566130] cec-meson_g12a_ao_cec: message 11 timed out
>>
>> I did a quick test with CoreELEC which uses the 4.9 downstream kernel,
>> CEC seems to work there. So it does not seem to be my hardware setup.
>>
>> A quick test with the latest Linux 5.16 shows the same errors.
>>
>> Do you happen to have an idea? Do you know if HDMI CEC using upstream
>> kernels worked at one point on that particular platform?
> 
> I'm using Arch Linux on my ODROID-n2 (non-plus) and HDMI CEC works as 
> expected.
> Currently I'm running a 5.15.13-1-aarch64-ARCH kernel. AFAICS the mentioned 
> patch is mainline since v5.14. I can see my TV without issues. I have to add 
> that not every cable is suitable for HDMI CEC, I have one where CEC does not 
> work (in general).

Hm, interesting, thanks for the datapoint!

I tried to reproduce your findings, unfortunately I am not successful in
booting mainline using Arch Linux ARM so far. It seems it comes with
downstream 4.9 kernel by default (where CEC seems to work in this case
too). I then installed linux-aarch64 and adjusted the device tree, but
it seems that the downstream U-Boot 2015.01-10 has some hardcoded
"rsvmem" command which fails. How are you booting v5.14?

It is a bit surprising that 5.15.13 works for you but 5.16 didn't for
me. That makes me wonder, could it be bootloader dependent? Are you
using downstream U-Boot?

--
Stefan

> 
> HTH
> Alexander
> ------
> $ cec-ctl --playback
> $ cec-ctl -S
> Driver Info:
>         Driver Name                : meson-ao-cec-g12a
>         Adapter Name               : meson_g12a_ao_cec
>         Capabilities               : 0x0000011e
>                 Logical Addresses
>                 Transmit
>                 Passthrough
>                 Remote Control Support
>                 Connector Info
>         Driver version             : 5.15.13
>         Available Logical Addresses: 4
>         DRM Connector Info         : card 1, connector 32
>         Physical Address           : 1.0.0.0
>         Logical Address Mask       : 0x0010
>         CEC Version                : 2.0
>         Vendor ID                  : 0x000c03 (HDMI)
>         OSD Name                   : 'Playback'
>         Logical Addresses          : 1 (Allow RC Passthrough)
> 
>           Logical Address          : 4 (Playback Device 1)
>             Primary Device Type    : Playback
>             Logical Address Type   : Playback
>             All Device Types       : Playback
>             RC TV Profile          : None
>             Device Features        :
>                 None
> 
>         System Information for device 0 (TV) from device 4 (Playback Device 
> 1):
>                 CEC Version                : 1.4
>                 Physical Address           : 0.0.0.0
>                 Primary Device Type        : TV
>                 Vendor ID                  : 0x080046 (Sony)
>                 OSD Name                   : 'TV'
>                 Power Status               : Standby
> 
>         Topology:
> 
>             0.0.0.0: TV
>                 1.0.0.0: Playback Device 1

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^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: (EXT) HDMI CEC on ODROID-N2+
  2022-01-15 10:52   ` Stefan Agner
@ 2022-01-15 13:28     ` Stefan Agner
  2022-01-16 10:14       ` Alexander Stein
  0 siblings, 1 reply; 7+ messages in thread
From: Stefan Agner @ 2022-01-15 13:28 UTC (permalink / raw)
  To: Alexander Stein; +Cc: narmstrong, linux-amlogic, linux-media

Hi Alexander, Hi Neil,

On 2022-01-15 11:52, Stefan Agner wrote:
> Hi Alexander,
> 
> On 2022-01-15 11:02, Alexander Stein wrote:
>> Hi Stefan,
>>
>> Am Donnerstag, 13. Januar 2022, 15:36:38 CET schrieb Stefan Agner:
>>> Hi Neil,
>>>
>>> I am trying to use HDMI CEC on ODROID-N2+ using Linux 5.10.91. However,
>>> I was unsuccessful: As far as I can tell cec-client uses the right
>>> device (I disabled CONFIG_DRM_DW_HDMI_CEC since my kernel is still
>>> missing your patch "drm/meson: dw-hdmi: disable DW-HDMI CEC
>>> sub-driver"). But communication won't work, and dmesg prints timeout
>>> messages:
>>>
>>> [   68.831253] cec-meson_g12a_ao_cec: message ff 84 20 00 06 timed out
>>> [   71.134987] cec-meson_g12a_ao_cec: message ff 87 00 15 82 timed out
>>> [   73.438826] cec-meson_g12a_ao_cec: message f0 timed out
>>> [   75.742677] cec-meson_g12a_ao_cec: message f0 timed out
>>> [   78.046555] cec-meson_g12a_ao_cec: message f0 timed out
>>> [   80.350446] cec-meson_g12a_ao_cec: message f0 timed out
>>> [   82.654358] cec-meson_g12a_ao_cec: message 11 timed out
>>> [   84.958285] cec-meson_g12a_ao_cec: message 11 timed out
>>> [   87.262194] cec-meson_g12a_ao_cec: message 11 timed out
>>> [   89.566130] cec-meson_g12a_ao_cec: message 11 timed out
>>>
>>> I did a quick test with CoreELEC which uses the 4.9 downstream kernel,
>>> CEC seems to work there. So it does not seem to be my hardware setup.
>>>
>>> A quick test with the latest Linux 5.16 shows the same errors.
>>>
>>> Do you happen to have an idea? Do you know if HDMI CEC using upstream
>>> kernels worked at one point on that particular platform?
>>
>> I'm using Arch Linux on my ODROID-n2 (non-plus) and HDMI CEC works as
>> expected.
>> Currently I'm running a 5.15.13-1-aarch64-ARCH kernel. AFAICS the mentioned
>> patch is mainline since v5.14. I can see my TV without issues. I have to add
>> that not every cable is suitable for HDMI CEC, I have one where CEC does not
>> work (in general).
> 
> Hm, interesting, thanks for the datapoint!
> 
> I tried to reproduce your findings, unfortunately I am not successful in
> booting mainline using Arch Linux ARM so far. It seems it comes with
> downstream 4.9 kernel by default (where CEC seems to work in this case
> too). I then installed linux-aarch64 and adjusted the device tree, but
> it seems that the downstream U-Boot 2015.01-10 has some hardcoded
> "rsvmem" command which fails. How are you booting v5.14?

FWIW, adjusted U-Boot load addresses fixed that issue:
# Set load addresses
setenv dtb_loadaddr "0x20000000"
setenv loadaddr "0x1080000"
setenv initrd_loadaddr "0x4080000"

And I can confirm, HDMI CEC works with Arch Linux 5.15.13 kernel!

> 
> It is a bit surprising that 5.15.13 works for you but 5.16 didn't for
> me. That makes me wonder, could it be bootloader dependent? Are you
> using downstream U-Boot?

That assumption turned out to be wrong: I used our mainline based U-Boot
2021.10 instead of the Arch Linux ARM U-Boot, and HDMI CEC continued to
work.

I then moved to 5.15.13 as well to rule out any kernel changes. But
still, in our configuration HDMI CEC did not work. I ended up diffing
configuration, and noticed that we are using built-in CONFIG_CEC_CORE
whereas Arch Linux uses it as a module. To build CONFIG_CEC_CORE as a
module I had to change some other configuration from built-in to module,
namely:

- CONFIG_CEC_CORE=m
- CONFIG_DRM_DW_HDMI=m
- CONFIG_DRM_MESON=m
- CONFIG_DRM_MESON_DW_HDMI=m

With that change, HDMI CEC started to work in my builds too!

With that change, it also works on Linux 5.10.

I guess there is some ordering issue or something which makes it fail
when those drivers are built-in? Note that I did not change
CONFIG_CEC_MESON_G12A_AO, that driver was already a module before.

--
Stefan

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http://lists.infradead.org/mailman/listinfo/linux-amlogic

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: (EXT) HDMI CEC on ODROID-N2+
  2022-01-15 13:28     ` Stefan Agner
@ 2022-01-16 10:14       ` Alexander Stein
  2022-01-16 10:50         ` Stefan Agner
  0 siblings, 1 reply; 7+ messages in thread
From: Alexander Stein @ 2022-01-16 10:14 UTC (permalink / raw)
  To: Stefan Agner; +Cc: narmstrong, linux-amlogic, linux-media

Hi Stefan,

Am Samstag, 15. Januar 2022, 14:28:01 CET schrieb Stefan Agner:
> > I tried to reproduce your findings, unfortunately I am not successful in
> > booting mainline using Arch Linux ARM so far. It seems it comes with
> > downstream 4.9 kernel by default (where CEC seems to work in this case
> > too). I then installed linux-aarch64 and adjusted the device tree, but
> > it seems that the downstream U-Boot 2015.01-10 has some hardcoded
> > "rsvmem" command which fails. How are you booting v5.14?
> 
> FWIW, adjusted U-Boot load addresses fixed that issue:
> # Set load addresses
> setenv dtb_loadaddr "0x20000000"
> setenv loadaddr "0x1080000"
> setenv initrd_loadaddr "0x4080000"
> 
> And I can confirm, HDMI CEC works with Arch Linux 5.15.13 kernel!

Yes, you need to modify the loading addresses as with newer kernels the size 
increased. With the load addresses you will hit a memory hole which aborts the 
boot process.
I'm on downstream u-boot BTW.

> That assumption turned out to be wrong: I used our mainline based U-Boot
> 2021.10 instead of the Arch Linux ARM U-Boot, and HDMI CEC continued to
> work.

Does the mainstream U-Boot work out of the box? Or does it require some 
additional configuration?

> I then moved to 5.15.13 as well to rule out any kernel changes. But
> still, in our configuration HDMI CEC did not work. I ended up diffing
> configuration, and noticed that we are using built-in CONFIG_CEC_CORE
> whereas Arch Linux uses it as a module. To build CONFIG_CEC_CORE as a
> module I had to change some other configuration from built-in to module,
> namely:
> 
> - CONFIG_CEC_CORE=m
> - CONFIG_DRM_DW_HDMI=m
> - CONFIG_DRM_MESON=m
> - CONFIG_DRM_MESON_DW_HDMI=m
> 
> With that change, HDMI CEC started to work in my builds too!
> 
> With that change, it also works on Linux 5.10.
> 
> I guess there is some ordering issue or something which makes it fail
> when those drivers are built-in? Note that I did not change
> CONFIG_CEC_MESON_G12A_AO, that driver was already a module before.

You need all 4 options above to be modules? Or is it maybe enough to set 
CONFIG_DRM_DW_HDMI_CEC=m? This should make CONFIG_CEC_CORE=m as well, while 
the other modules are built-in.
I suspect at some point a -EPROBE_DEFER is missing.

Just FYI: Arch Linux aarch64 kernel config currently lacks some drivers for 
HDMI audio. See [1].

Best regards,
Alexander

[1] https://github.com/archlinuxarm/PKGBUILDs/pull/1864




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^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: (EXT) HDMI CEC on ODROID-N2+
  2022-01-16 10:14       ` Alexander Stein
@ 2022-01-16 10:50         ` Stefan Agner
  0 siblings, 0 replies; 7+ messages in thread
From: Stefan Agner @ 2022-01-16 10:50 UTC (permalink / raw)
  To: Alexander Stein; +Cc: narmstrong, linux-amlogic, linux-media

Hi Alexander,

On 2022-01-16 11:14, Alexander Stein wrote:
> Hi Stefan,
> 
> Am Samstag, 15. Januar 2022, 14:28:01 CET schrieb Stefan Agner:
>> That assumption turned out to be wrong: I used our mainline based U-Boot
>> 2021.10 instead of the Arch Linux ARM U-Boot, and HDMI CEC continued to
>> work.
> 
> Does the mainstream U-Boot work out of the box? Or does it require some 
> additional configuration?
> 

Yes mainline U-Boot works out of the box. Building it is somewhat
involved since it requires extra firmwares (there are build instructions
in the source tree in board/amlogic/w400/README.odroid-n2).

You need to add a boot script to your boot partition. I used the script
part of the uboot-odroid-n2-mainline package as inspiration [1]. It
needs some adjustments as it seems to try to boot from the root file
system directly (and my setup used the FAT/ext4 setup still).

We carry a single patch which improved reliability booting from eMMC,
see [2].


>> I then moved to 5.15.13 as well to rule out any kernel changes. But
>> still, in our configuration HDMI CEC did not work. I ended up diffing
>> configuration, and noticed that we are using built-in CONFIG_CEC_CORE
>> whereas Arch Linux uses it as a module. To build CONFIG_CEC_CORE as a
>> module I had to change some other configuration from built-in to module,
>> namely:
>>
>> - CONFIG_CEC_CORE=m
>> - CONFIG_DRM_DW_HDMI=m
>> - CONFIG_DRM_MESON=m
>> - CONFIG_DRM_MESON_DW_HDMI=m
>>
>> With that change, HDMI CEC started to work in my builds too!
>>
>> With that change, it also works on Linux 5.10.
>>
>> I guess there is some ordering issue or something which makes it fail
>> when those drivers are built-in? Note that I did not change
>> CONFIG_CEC_MESON_G12A_AO, that driver was already a module before.
> 
> You need all 4 options above to be modules? Or is it maybe enough to set 
> CONFIG_DRM_DW_HDMI_CEC=m? This should make CONFIG_CEC_CORE=m as well, while 
> the other modules are built-in.

In our builds I disabled CONFIG_DRM_DW_HDMI_CEC entirely actually.

It seems that CONFIG_DRM_DW_HDMI is tied to CEC_CORE through this
dependency:

config DRM_DW_HDMI
...
        select CEC_CORE if CEC_NOTIFIER

> I suspect at some point a -EPROBE_DEFER is missing.
> 
> Just FYI: Arch Linux aarch64 kernel config currently lacks some drivers for 
> HDMI audio. See [1].

Thanks for the link, just checked, it seems our kernel configuration
covers those.

--
Stefan

> 
> Best regards,
> Alexander
> 
> [1] https://github.com/archlinuxarm/PKGBUILDs/pull/1864

[1]
https://github.com/archlinuxarm/PKGBUILDs/blob/master/alarm/uboot-odroid-c2-mainline/boot.txt
[2]
https://github.com/home-assistant/operating-system/blob/rel-7/buildroot-external/board/hardkernel/patches/uboot/0001-HACK-mmc-meson-gx-limit-to-24MHz.patch

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^ permalink raw reply	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-01-16 10:50 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2022-01-13 14:36 HDMI CEC on ODROID-N2+ Stefan Agner
2022-01-13 15:52 ` Neil Armstrong
2022-01-15 10:02 ` (EXT) " Alexander Stein
2022-01-15 10:52   ` Stefan Agner
2022-01-15 13:28     ` Stefan Agner
2022-01-16 10:14       ` Alexander Stein
2022-01-16 10:50         ` Stefan Agner

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