On Thu, Aug 11, 2016 at 03:54:03PM +0800, Mark Yao wrote: > hdmi->disabled maybe not match to the real hardware status. > > ->dw_hdmi_bridge_enable() > hdmi->disabled = false; > -->dw_hdmi_update_power() > if (hdmi->rxsense) > force = DRM_FORCE_ON; > else > force = DRM_FORCE_OFF; > > hdmi->rxsense maybe false on bridge enable path, then hdmi->disabled > is false, but actually hardware is power off, they are not match. ... which is correct. If rxsense is false, it means there is nothing plugged in, so we don't power the hardware up until something _is_ plugged in. When something is plugged in, we get the HPD and RXSENSE events, which will cause dw_hdmi_update_power() to be called. hdmi->disabled is merely a bit mask of things that would cause us to want to avoid powering the hardware up when rxsense becomes true. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.
