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 >
