drm/radeon: Unbreak HPD handling for r600+
authorLyude <lyude@redhat.com>
Thu, 11 May 2017 23:31:12 +0000 (19:31 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Wed, 24 May 2017 21:39:33 +0000 (17:39 -0400)
commite12fcff79974a32eef523b80e5f485a4bbe102bb
tree24054f119a4821d81546a9d786a5e31c05c8925b
parentae5037dcfeef6f90e0b352e05e45d89700cefa23
drm/radeon: Unbreak HPD handling for r600+

We end up reading the interrupt register for HPD5, and then writing it
to HPD6 which on systems without anything using HPD5 results in
permanently disabling hotplug on one of the display outputs after the
first time we acknowledge a hotplug interrupt from the GPU.

This code is really bad. But for now, let's just fix this. I will
hopefully have a large patch series to refactor all of this soon.

Reviewed-by: Christian K├Ânig <christian.koenig@amd.com>
Signed-off-by: Lyude <lyude@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drivers/gpu/drm/radeon/cik.c
drivers/gpu/drm/radeon/evergreen.c
drivers/gpu/drm/radeon/r600.c
drivers/gpu/drm/radeon/si.c