Hi Fabio, 2017-10-14 2:18 GMT+02:00 Fabio Estevam <festevam@xxxxxxxxx>: > Hi Pierre-Hugues, > > On Fri, Oct 13, 2017 at 7:53 PM, Pierre-Hugues Husson <phh@xxxxxx> wrote: >> The documentation already mentions "cec" optional clock, but >> currently the driver doesn't enable it. > > The cec clock is enabled at dw_hdmi_cec_enable(). As far as I understand, dw_hdmi_cec_enable only gates the CEC clock inside the Synopsis IP, but the SOC still has to provide a specific CEC clock to it. To enable such an external CEC clock, the binding documentation [1] mentions a "cec" optional clock, and I'm not seeing any code in dw-hdmi to enable it. Regards, [1] On next-20170929 Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt line 28
