Hi, On Mon, Jun 29, 2020 at 02:00:32PM +0800, Chen-Yu Tsai wrote: > From: Chen-Yu Tsai <wens@xxxxxxxx> > > The HPD sense mechanism in Allwinner's old HDMI encoder hardware is more > or less an input-only GPIO. Other GPIO-based HPD implementations > directly return the current state, instead of polling for a specific > state and returning the other if that times out. > > Remove the I/O polling from sun4i_hdmi_connector_detect() and directly > return a known state based on the current reading. This also gets rid > of excessive CPU usage by kworker as reported on Stack Exchange [1] and > Armbian forums [2]. > > [1] https://superuser.com/questions/1515001/debian-10-buster-on-cubietruck-with-bug-in-sun4i-drm-hdmi > [2] https://forum.armbian.com/topic/14282-headless-systems-and-sun4i_drm_hdmi-a10a20/ > > Fixes: 9c5681011a0c ("drm/sun4i: Add HDMI support") > Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx> Applied, thanks for figuring that out Maxime
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