Hi,
On 1 March 2016 at 01:52, Eric Anholt eric@anholt.net wrote:
These are for fixing the vc4 driver on the Pi 3. Note that patch 2 will also be necessary for fixing HPD on the Pi2, which we've been carrying downstream patches to work around until now.
Indeed. Having cherry-picked 80032d2e61 and added ACTIVE_LOW to the bcm2836-rpi-2-b DT, I now get HPD reported correctly.
I think it might still need work: on RPi2 again, DDC fails on boot (the same BCM2835_I2C_S_ERR bit being set, i.e. 'i2c transfer failed: 100'), and does work after a hotplug cycle. But the machine then immediately hard-hangs - no serial console - after cat /sys/class/drm/card0-HDMI-A-1/edid.
On the grounds that the VC4 node isn't yet in upstream DT though, and this _does_ indeed fix HPD: Tested-by: Daniel Stone daniels@collabora.com
Cheers, Daniel