[PATCH 6/7] drm/i915/psr: Add VRR send push interface for PSR usage

[Jouni Högander]

Add own interface for PSR usage to perform push on frontbuffer tracking
invalidate and flush call backs. Use this new interface from PSR code.

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c |  7 ++++++-
 drivers/gpu/drm/i915/display/intel_vrr.c | 18 ++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vrr.h |  4 ++++
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 5be8076475f0b..7959a33771b13 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -2326,8 +2326,13 @@ static void psr_force_exit(struct intel_dp *intel_dp)
 	 * This workaround do not exist for platforms with display 10 or newer
 	 * but testing proved that it works for up display 13, for newer
 	 * than that testing will be needed.
+	 *
+	 * In Lunarlake we can use TRANS_PUSH mechanism to force sending update
+	 * to sink.
 	 */
-	intel_de_write(display, CURSURFLIVE(display, intel_dp->psr.pipe), 0);
+	DISPLAY_VER(display) >= 20 ?
+		intel_vrr_psr_send_push(display, cpu_transcoder) :
+		intel_de_write(display, CURSURFLIVE(display, intel_dp->psr.pipe), 0);
 }
 
 void intel_psr2_program_trans_man_trk_ctl(const struct intel_crtc_state *crtc_state)
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 5925ade4591d4..d51830d173b61 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -328,6 +328,24 @@ void intel_vrr_send_push(const struct intel_crtc_state *crtc_state)
 		       trans_push_val);
 }
 
+/**
+ * intel_vrr_psr_send_push - Send push interface for PSR code
+ * @display: Intel display
+ * @cpu_transcoder: cpu_transcode
+ *
+ * This is for PSR usage to perform push on frontbuffer tracking invalidate and
+ * flush call back. PSR mutex should be taken by caller.
+ */
+void intel_vrr_psr_send_push(struct intel_display *display,
+			     enum transcoder cpu_transcoder)
+{
+	if (DISPLAY_VER(display) < 20)
+		return;
+
+	intel_de_rmw(display, TRANS_PUSH(display, cpu_transcoder), 0,
+		     TRANS_PUSH_SEND | LNL_TRANS_PUSH_PSR_PR_EN);
+}
+
 bool intel_vrr_is_push_sent(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_display *display = to_intel_display(crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.h b/drivers/gpu/drm/i915/display/intel_vrr.h
index a75f159168c11..3da7ba12697ff 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.h
+++ b/drivers/gpu/drm/i915/display/intel_vrr.h
@@ -12,6 +12,8 @@ struct drm_connector_state;
 struct intel_atomic_state;
 struct intel_connector;
 struct intel_crtc_state;
+struct intel_display;
+enum transcoder;
 
 bool intel_vrr_is_capable(struct intel_connector *connector);
 bool intel_vrr_is_in_range(struct intel_connector *connector, int vrefresh);
@@ -25,6 +27,8 @@ bool intel_vrr_is_push_sent(const struct intel_crtc_state *crtc_state);
 void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state);
 void intel_vrr_psr_frame_change_enable(const struct intel_crtc_state *crtc_state);
 void intel_vrr_psr_frame_change_disable(const struct intel_crtc_state *crtc_state);
+void intel_vrr_psr_send_push(struct intel_display *display,
+			     enum transcoder cpu_transcoder);
 void intel_vrr_get_config(struct intel_crtc_state *crtc_state);
 int intel_vrr_vmax_vblank_start(const struct intel_crtc_state *crtc_state);
 int intel_vrr_vmin_vblank_start(const struct intel_crtc_state *crtc_state);
-- 
2.34.1