From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> if the new dbuf slices are a superset of the old dbuf slices then we don't have to do anything in intel_dbuf_post_plane_update(). Restructure the code to skip such redundant dbuf slice updates. The main benefit is slightly less confusing logs. Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/display/skl_watermark.c | 27 +++++++++++++------- 1 file changed, 18 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c index 1b48009efe2b..50ec51065118 100644 --- a/drivers/gpu/drm/i915/display/skl_watermark.c +++ b/drivers/gpu/drm/i915/display/skl_watermark.c @@ -3788,16 +3788,20 @@ void intel_dbuf_pre_plane_update(struct intel_atomic_state *state) intel_atomic_get_new_dbuf_state(state); const struct intel_dbuf_state *old_dbuf_state = intel_atomic_get_old_dbuf_state(state); + u8 old_slices, new_slices; - if (!new_dbuf_state || - new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices) + if (!new_dbuf_state) + return; + + old_slices = old_dbuf_state->enabled_slices; + new_slices = old_dbuf_state->enabled_slices | new_dbuf_state->enabled_slices; + + if (old_slices == new_slices) return; WARN_ON(!new_dbuf_state->base.changed); - gen9_dbuf_slices_update(i915, - old_dbuf_state->enabled_slices | - new_dbuf_state->enabled_slices); + gen9_dbuf_slices_update(i915, new_slices); } void intel_dbuf_post_plane_update(struct intel_atomic_state *state) @@ -3807,15 +3811,20 @@ void intel_dbuf_post_plane_update(struct intel_atomic_state *state) intel_atomic_get_new_dbuf_state(state); const struct intel_dbuf_state *old_dbuf_state = intel_atomic_get_old_dbuf_state(state); + u8 old_slices, new_slices; - if (!new_dbuf_state || - new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices) + if (!new_dbuf_state) + return; + + old_slices = old_dbuf_state->enabled_slices | new_dbuf_state->enabled_slices; + new_slices = new_dbuf_state->enabled_slices; + + if (old_slices == new_slices) return; WARN_ON(!new_dbuf_state->base.changed); - gen9_dbuf_slices_update(i915, - new_dbuf_state->enabled_slices); + gen9_dbuf_slices_update(i915, new_slices); } static int skl_watermark_ipc_status_show(struct seq_file *m, void *data) -- 2.43.2
