[PATCH 9/9] drm/atomic: Add encoder_mask to crtc_state.

[Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>]

This allows iteration over encoders without requiring connection_mutex.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/drm_atomic_helper.c  | 4 ++++
 drivers/gpu/drm/i915/intel_display.c | 3 +++
 include/drm/drm_crtc.h               | 2 ++
 3 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index fb79c54b2aed..f3fd8f131f92 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -269,6 +269,8 @@ mode_fixup(struct drm_atomic_state *state)
 			continue;
 
 		drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode);
+
+		crtc_state->encoder_mask = 0;
 	}
 
 	for_each_connector_in_state(state, connector, conn_state, i) {
@@ -288,6 +290,8 @@ mode_fixup(struct drm_atomic_state *state)
 		 * it away), so we won't call ->mode_fixup twice.
 		 */
 		encoder = conn_state->best_encoder;
+		crtc_state->encoder_mask |= 1 << drm_encoder_index(encoder);
+
 		funcs = encoder->helper_private;
 		if (!funcs)
 			continue;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 21b1984e828b..3317db3806a8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15310,6 +15310,7 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
 		crtc->base.state->active = crtc->active;
 		crtc->base.enabled = crtc->active;
 		crtc->base.state->connector_mask = 0;
+		crtc->base.state->encoder_mask = 0;
 
 		/* Because we only establish the connector -> encoder ->
 		 * crtc links if something is active, this means the
@@ -15363,6 +15364,8 @@ static void intel_sanitize_encoder(struct intel_encoder *encoder)
 
 		crtc->state->connector_mask |=
 			1 << drm_connector_index(&connector->base);
+		crtc->state->encoder_mask |=
+			1 << drm_encoder_index(&encoder->base);
 	}
 
 	if (active && !has_active_crtc) {
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 4999fe530f37..7ea83b6a2864 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -265,6 +265,7 @@ struct drm_atomic_state;
  * @connectors_changed: connectors to this crtc have been updated
  * @plane_mask: bitmask of (1 << drm_plane_index(plane)) of attached planes
  * @connector_mask: bitmask of (1 << drm_connector_index(connector)) of attached connectors
+ * @encoder_mask: bitmask of (1 << drm_encoder_index(encoder)) of attached encoders
  * @last_vblank_count: for helpers and drivers to capture the vblank of the
  * 	update to ensure framebuffer cleanup isn't done too early
  * @adjusted_mode: for use by helpers and drivers to compute adjusted mode timings
@@ -299,6 +300,7 @@ struct drm_crtc_state {
 	u32 plane_mask;
 
 	u32 connector_mask;
+	u32 encoder_mask;
 
 	/* last_vblank_count: for vblank waits before cleanup */
 	u32 last_vblank_count;
-- 
2.1.0

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