To implement Wa_16025596647 we need to get notification of vblank interrupt
enable/disable. Add new interface to PSR code for this notification.
Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_psr.c | 40 ++++++++++++++++++++++++
drivers/gpu/drm/i915/display/intel_psr.h | 2 ++
2 files changed, 42 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index baf6a7110a55..afb9faed7784 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -3820,6 +3820,46 @@ void intel_psr_notify_pipe_change(struct intel_atomic_state *state,
}
}
+/**
+ * intel_psr_notify_vblank_enable_disable - Notify PSR about enable/disable of vblank
+ * @display: intel display struct
+ * @enable: enable/disable
+ *
+ * This is targeted for underrun on idle PSR HW bug (Wa_16025596647) to apply
+ * remove the workaround when vblank is getting enabled/disabled
+ */
+void intel_psr_notify_vblank_enable_disable(struct intel_display *display,
+ bool enable)
+{
+ struct intel_encoder *encoder;
+
+ for_each_intel_encoder_with_psr(display->drm, encoder) {
+ struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+ mutex_lock(&intel_dp->psr.lock);
+ if (intel_dp->psr.panel_replay_enabled) {
+ mutex_unlock(&intel_dp->psr.lock);
+ break;
+ }
+
+ if (intel_dp->psr.enabled)
+ intel_psr_apply_underrun_on_idle_wa_locked(intel_dp);
+
+ mutex_unlock(&intel_dp->psr.lock);
+ return;
+ }
+
+ /*
+ * NOTE: intel_display_power_set_target_dc_state is used
+ * only by PSR * code for DC3CO handling. DC3CO target
+ * state is currently disabled in * PSR code. If DC3CO
+ * is taken into use we need take that into account here
+ * as well.
+ */
+ intel_display_power_set_target_dc_state(display, enable ? DC_STATE_DISABLE :
+ DC_STATE_EN_UPTO_DC6);
+}
+
static void
psr_source_status(struct intel_dp *intel_dp, struct seq_file *m)
{
diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h
index bfe368239bc2..a914b7ee3756 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.h
+++ b/drivers/gpu/drm/i915/display/intel_psr.h
@@ -64,6 +64,8 @@ void intel_psr_notify_pipe_change(struct intel_atomic_state *state,
struct intel_crtc *crtc, bool enable);
void intel_psr_notify_dc5_dc6(struct intel_display *display);
void intel_psr_dc5_dc6_wa_init(struct intel_display *display);
+void intel_psr_notify_vblank_enable_disable(struct intel_display *display,
+ bool enable);
bool intel_psr_link_ok(struct intel_dp *intel_dp);
void intel_psr_lock(const struct intel_crtc_state *crtc_state);
--
2.43.0
