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| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2020-06-29 13:03:52 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-09 09:39:39 +0200 |
| commit | fcb408a7282302bd8b8afc6ef8db42b4eece23ee (patch) | |
| tree | 4fbb4248c7d9108664126f2268c4794c00d1a1b9 /drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | |
| parent | 13b2fe391cac70c7746e2cb68e73d99002f1cd00 (diff) | |
drm/amd/display: Only revalidate bandwidth on medium and fast updates
commit 6eb3cf2e06d22b2b08e6b0ab48cb9c05a8e1a107 upstream.
[Why]
Changes that are fast don't require updating DLG parameters making
this call unnecessary. Considering this is an expensive call it should
not be done on every flip.
DML touches clocks, p-state support, DLG params and a few other DC
internal flags and these aren't expected during fast. A hang has been
reported with this change when called on every flip which suggests that
modifying these fields is not recommended behavior on fast updates.
[How]
Guard the validation to only happen if update type isn't FAST.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1191
Fixes: a24eaa5c51255b ("drm/amd/display: Revalidate bandwidth before commiting DC updates")
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c')
0 files changed, 0 insertions, 0 deletions