Re: HDMI CEC on ODROID-N2+

[Neil Armstrong <narmstrong@baylibre.com>]

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
> 


_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic