Add new function to trigger "Frame Change" event for ensuring we are waking
up before vblank evasion.
Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_psr.c | 22 ++++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_psr.h | 3 +++
2 files changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index c6712312a04d4..945cab1537732 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -44,6 +44,7 @@
#include "intel_psr.h"
#include "intel_psr_regs.h"
#include "intel_snps_phy.h"
+#include "intel_vblank.h"
#include "skl_universal_plane.h"
/**
@@ -2289,6 +2290,27 @@ bool intel_psr_needs_block_dc_vblank(const struct intel_crtc_state *crtc_state)
return false;
}
+/**
+ * intel_psr_trigger_frame_change_event - Trigger "Frame Change" event
+ * @state: the atomic state
+ * @dsb: DSB context
+ * @crtc: the CRTC
+ *
+ * Generate PSR "Frame Change" event.
+ */
+void intel_psr_trigger_frame_change_event(struct intel_atomic_state *state,
+ struct intel_dsb *dsb,
+ struct intel_crtc *crtc)
+{
+ const struct intel_crtc_state *crtc_state =
+ intel_pre_commit_crtc_state(state, crtc);
+ struct intel_display *display = to_intel_display(crtc);
+
+ if (crtc_state->has_psr)
+ intel_de_write_dsb(display, dsb,
+ CURSURFLIVE(display, crtc->pipe), 0);
+}
+
static u32 man_trk_ctl_enable_bit_get(struct intel_display *display)
{
struct drm_i915_private *dev_priv = to_i915(display->drm);
diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h
index e6eba6633a92b..1cd9ab8aa6e81 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.h
+++ b/drivers/gpu/drm/i915/display/intel_psr.h
@@ -64,6 +64,9 @@ bool intel_psr_link_ok(struct intel_dp *intel_dp);
void intel_psr_lock(const struct intel_crtc_state *crtc_state);
void intel_psr_unlock(const struct intel_crtc_state *crtc_state);
+void intel_psr_trigger_frame_change_event(struct intel_atomic_state *state,
+ struct intel_dsb *dsb,
+ struct intel_crtc *crtc);
void intel_psr_connector_debugfs_add(struct intel_connector *connector);
void intel_psr_debugfs_register(struct intel_display *display);
--
2.43.0
