In order to make sure we are not breaking the proper sequence
lets to updates step by step and don't change MBUS join value
during MDCLK/CDCLK programming stage.
MBUS join programming would be taken care by pre/post ddb hooks.
v2: - Reworded comment about using old mbus_join value in
intel_set_cdclk(Ville Syrjälä)
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_cdclk.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 31aaa9780dfcf..c7813d433c424 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -2611,9 +2611,19 @@ intel_set_cdclk_pre_plane_update(struct intel_atomic_state *state)
if (pipe == INVALID_PIPE ||
old_cdclk_state->actual.cdclk <= new_cdclk_state->actual.cdclk) {
+ struct intel_cdclk_config cdclk_config;
+
drm_WARN_ON(&i915->drm, !new_cdclk_state->base.changed);
- intel_set_cdclk(i915, &new_cdclk_state->actual, pipe);
+ /*
+ * By this hack we want to prevent mbus_join to be changed
+ * beforehand - we will take care of this later in
+ * intel_dbuf_mbus_post_ddb_update
+ */
+ cdclk_config = new_cdclk_state->actual;
+ cdclk_config.joined_mbus = old_cdclk_state->actual.joined_mbus;
+
+ intel_set_cdclk(i915, &cdclk_config, pipe);
}
}
--
2.37.3
