mx6 hdmi resolution behaviour
Russell King - ARM Linux
linux at arm.linux.org.uk
Tue Jun 23 13:41:54 PDT 2015
On Tue, Jun 23, 2015 at 01:52:50PM -0300, Fabio Estevam wrote:
> On Tue, Jun 23, 2015 at 1:44 PM, Russell King - ARM Linux
> <linux at arm.linux.org.uk> wrote:
> > If you have no connected connectors, then you get 1024x768:
> > imx-drm display-subsystem: No connectors reported connected with modes
> > [drm] Cannot find any crtc or sizes - going 1024x768
> > as that's what DRM defaults to when it has no other timing information
> > available.
> Agreed, but after the cable is connected we could try to find a more
> suitable timing?
> >> [ 16.310548] imx-ipuv3 2400000.ipu: videomode adapted for IPU restrictions
> > I don't see this message booting on a Hummingboard with HDMI
> > disconnected.
> I see this message in the following case:
> - Boot the board with HDMI disconnected
> - Connect the HDMI cable and then such message is displayed.
I've just tried this (the HBi1 was booted previously with the HDMI socket
disconnected). Just now, I turned the TV on, and then connected it to
The TV reported a resolution of 1024x768, and the kernel log was silent.
My guess would be that your HDMI sink is reporting slightly non-standard
1024x768 timings, which cause the IPU restrictions to be violated. Maybe
dumping the EDID of the HDMI device would reveal this?
# edid-decode < /sys/class/drm/card0-HDMI-A-1/edid
might provide some hints?
FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up
according to speedtest.net.
More information about the dri-devel