[PATCH 2/2] drm/amd/display: use drm_crtc_set_vblank_offdelay()

[Hamza Mahfooz <hamza.mahfooz@xxxxxxx>]

Hook up drm_crtc_set_vblank_offdelay() in amdgpu_dm, so that we can
enable PSR more quickly for displays that support it.

Signed-off-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 30 ++++++++++++++-----
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index fdbc9b57a23d..ee6c31e9d3c4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8231,7 +8231,7 @@ static int amdgpu_dm_encoder_init(struct drm_device *dev,
 
 static void manage_dm_interrupts(struct amdgpu_device *adev,
 				 struct amdgpu_crtc *acrtc,
-				 bool enable)
+				 struct dm_crtc_state *acrtc_state)
 {
 	/*
 	 * We have no guarantee that the frontend index maps to the same
@@ -8239,12 +8239,25 @@ static void manage_dm_interrupts(struct amdgpu_device *adev,
 	 *
 	 * TODO: Use a different interrupt or check DC itself for the mapping.
 	 */
-	int irq_type =
-		amdgpu_display_crtc_idx_to_irq_type(
-			adev,
-			acrtc->crtc_id);
+	int irq_type = amdgpu_display_crtc_idx_to_irq_type(adev,
+							   acrtc->crtc_id);
+	struct dc_crtc_timing *timing;
+	int offdelay;
+
+	if (acrtc_state) {
+		timing = &acrtc_state->stream->timing;
+
+		/* at least 2 frames */
+		offdelay = 2000 / div64_u64(div64_u64((timing->pix_clk_100hz *
+						       (uint64_t)100),
+						      timing->v_total),
+					    timing->h_total) + 1;
+
+		if (acrtc_state->stream->link->psr_settings.psr_version <
+		    DC_PSR_VERSION_UNSUPPORTED &&
+		    amdgpu_ip_version(adev, DCE_HWIP, 0) >= IP_VERSION(3, 5, 0))
+			drm_crtc_set_vblank_offdelay(&acrtc->base, offdelay);
 
-	if (enable) {
 		drm_crtc_vblank_on(&acrtc->base);
 		amdgpu_irq_get(
 			adev,
@@ -9319,7 +9332,7 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
 		if (old_crtc_state->active &&
 		    (!new_crtc_state->active ||
 		     drm_atomic_crtc_needs_modeset(new_crtc_state))) {
-			manage_dm_interrupts(adev, acrtc, false);
+			manage_dm_interrupts(adev, acrtc, NULL);
 			dc_stream_release(dm_old_crtc_state->stream);
 		}
 	}
@@ -9834,7 +9847,8 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 		     drm_atomic_crtc_needs_modeset(new_crtc_state))) {
 			dc_stream_retain(dm_new_crtc_state->stream);
 			acrtc->dm_irq_params.stream = dm_new_crtc_state->stream;
-			manage_dm_interrupts(adev, acrtc, true);
+			manage_dm_interrupts(adev, acrtc,
+					     to_dm_crtc_state(new_crtc_state));
 		}
 		/* Handle vrr on->off / off->on transitions */
 		amdgpu_dm_handle_vrr_transition(dm_old_crtc_state, dm_new_crtc_state);
-- 
2.45.1