Attention is currently required from: Nico Huber, Matt DeVillier, Michael Niewöhner. Hello Nico Huber, Matt DeVillier, Michael Niewöhner,
I'd like you to reexamine a change. Please visit
https://review.coreboot.org/c/libgfxinit/+/46635
to look at the new patch set (#8).
Change subject: gfx gma skylake: Implement some workarounds ......................................................................
gfx gma skylake: Implement some workarounds
Without these workarounds, gfx_test will leave a WHL-U Librem Mini v1 in a state where entering low-power states results in a hang. With these workarounds, the system no longer locks up after running gfx_test. Looks like the hang does not happen when coreboot runs libgfxinit.
Steps to reproduce the hang: - Boot Linux without loading i915. - Run gfx_test without the workarounds. - After gfx_test exits and the machine enters a low-power state, it will lock up.
If something keeps the CPU from getting into low-power states (e.g. `cat /dev/zero > /dev/null`), the machine will not lock up. However, stopping the load task after gfx_test has run will result in a lock-up.
Change-Id: I4cd64cf4c1e702dc05709adc345a976a4e3c1ded Signed-off-by: Angel Pons th3fanbus@gmail.com --- M common/hw-gfx-gma-registers.ads M common/skylake/hw-gfx-gma-power_and_clocks.adb 2 files changed, 14 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/libgfxinit refs/changes/35/46635/8