Messages in this thread | | | Date | Tue, 1 Mar 2016 18:21:34 +0000 | Subject | Re: [PATCH 0/2] drm/vc4: Fixes for Raspberry Pi 3 | From | Daniel Stone <> |
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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
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