[Intel-gfx] [PATCH 1/4] drm/i915: Add an update callback to intel_encoder and call this on fastsets

[Hans de Goede]

When we are doing a fastset (needs_modeset=false, update_pipe=true) we
may need to update some encoder-level things such as checking that psr
is enabled.

This commit adds an update callback to intel_encoder and a new
intel_encoders_update helper which calls this for all encoders connected
to a crtc. The new intel_encoders_update helper is called from
intel_update_crtc this when doing a fastset.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 drivers/gpu/drm/i915/intel_display.c | 23 +++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h     |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e472b650931a..9a22c84ff2be 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5578,6 +5578,26 @@ static void intel_encoders_post_pll_disable(struct drm_crtc *crtc,
 	}
 }
 
+static void intel_encoders_update(struct drm_crtc *crtc,
+				  struct intel_crtc_state *crtc_state,
+				  struct drm_atomic_state *old_state)
+{
+	struct drm_connector_state *conn_state;
+	struct drm_connector *conn;
+	int i;
+
+	for_each_new_connector_in_state(old_state, conn, conn_state, i) {
+		struct intel_encoder *encoder =
+			to_intel_encoder(conn_state->best_encoder);
+
+		if (conn_state->crtc != crtc)
+			continue;
+
+		if (encoder->update)
+			encoder->update(encoder, crtc_state, conn_state);
+	}
+}
+
 static void ironlake_crtc_enable(struct intel_crtc_state *pipe_config,
 				 struct drm_atomic_state *old_state)
 {
@@ -12774,6 +12794,9 @@ static void intel_update_crtc(struct drm_crtc *crtc,
 	} else {
 		intel_pre_plane_update(to_intel_crtc_state(old_crtc_state),
 				       pipe_config);
+
+		if (pipe_config->update_pipe)
+			intel_encoders_update(crtc, pipe_config, state);
 	}
 
 	if (new_plane_state)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index ef1315d7c4ae..9fb5b518f91c 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -243,6 +243,9 @@ struct intel_encoder {
 	void (*post_pll_disable)(struct intel_encoder *,
 				 const struct intel_crtc_state *,
 				 const struct drm_connector_state *);
+	void (*update)(struct intel_encoder *,
+		       const struct intel_crtc_state *,
+		       const struct drm_connector_state *);
 	/* Read out the current hw state of this connector, returning true if
 	 * the encoder is active. If the encoder is enabled it also set the pipe
 	 * it is connected to in the pipe parameter. */
-- 
2.20.1