drm/i915: Track visible planes in a bitmask
In a lot of place we wish to know which planes on the crtc are actually
visible, or how many of them there are. Let's start tracking that in a
bitmask in the crtc state.
We already track enabled planes (ie. ones with an fb and crtc specified by
the user) but that's not quite the same thing as enabled planes may
still end up being invisible due to clipping and whatnot.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170302171508.1666-2-ville.syrjala@linux.intel.com
diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
index 41fd94e..1eaf840 100644
--- a/drivers/gpu/drm/i915/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
@@ -189,6 +189,12 @@ int intel_plane_atomic_check_with_state(struct intel_crtc_state *crtc_state,
if (ret)
return ret;
+ /* FIXME pre-g4x don't work like this */
+ if (intel_state->base.visible)
+ crtc_state->active_planes |= BIT(intel_plane->id);
+ else
+ crtc_state->active_planes &= ~BIT(intel_plane->id);
+
return intel_plane_atomic_calc_changes(&crtc_state->base, state);
}