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| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2020-06-29 13:03:52 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-07-02 12:02:56 -0400 |
| commit | 33d63b1f4d3a47f4697f86ab83b1c7221da4236e (patch) | |
| tree | be9d0f94e051ba211e110002bb9f3269e2831536 /drivers/gpu/drm/amd/display/dc | |
| parent | ecc874a6e7cb398b363b4e078fca4c097cb286ab (diff) | |
| download | linux-33d63b1f4d3a47f4697f86ab83b1c7221da4236e.tar.bz2 | |
drm/amd/display: Only revalidate bandwidth on medium and fast updates
[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>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 67402d75e67e..942ceb0f6383 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -2607,10 +2607,12 @@ void dc_commit_updates_for_stream(struct dc *dc, copy_stream_update_to_stream(dc, context, stream, stream_update); - if (!dc->res_pool->funcs->validate_bandwidth(dc, context, false)) { - DC_ERROR("Mode validation failed for stream update!\n"); - dc_release_state(context); - return; + if (update_type > UPDATE_TYPE_FAST) { + if (!dc->res_pool->funcs->validate_bandwidth(dc, context, false)) { + DC_ERROR("Mode validation failed for stream update!\n"); + dc_release_state(context); + return; + } } commit_planes_for_stream( |