Attention is currently required from: Nico Huber.
Hello Angel Pons,
I'd like you to reexamine a change. Please visit
https://review.coreboot.org/c/libgfxinit/+/83598?usp=email
to look at the new patch set (#3).
Change subject: transcoder: Don't try to disable disabled DDI func ......................................................................
transcoder: Don't try to disable disabled DDI func
Tiger Lake makes some trouble on the `All_Off' path in case a trans- coder is already disabled. It somehow seems to be able to seriously lock things up inside the processor, causing Linux to hang, report stalled CPUs, and the reset button not to work anymore. This might be related to disabled power wells, that we do not keep track of on the `All_Off' path.
As there shouldn't be no harm in skipping the register write for an already disabled transcoder, just do that.
Tested with Kontron COMe bTL6.
Change-Id: Ia505422570d967b192fe2eb8cab10f305aff3dd7 Signed-off-by: Nico Huber nico.huber@secunet.com --- M common/hw-gfx-gma-transcoder.adb 1 file changed, 4 insertions(+), 1 deletion(-)
git pull ssh://review.coreboot.org:29418/libgfxinit refs/changes/98/83598/3