[PATCH v5 2/6] drm/i915/vrr: Compute vrr.vsync_{start, end} during full modeset

[Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx>]

vrr.vsync_{start,end} computation should not depend on
crtc_state->vrr.enable.

--v1:
 - Explain commit message more clearly [Jani]
 - Instead of tweaking to fastset use vrr.flipline while computing AS_SDP.
--v2:
 - Correct computation of vrr.vsync_start/end should not depend on
   vrr.enable.[ville]
 - vrr enable disable requirement should not obstruct by SDP enable
   disable requirements. [Ville]
--v3:
 - Create separate patch for crtc_state_dump [Ankit].

--v4:
 - Update commit message and header [Ankit].

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx>
---
 drivers/gpu/drm/i915/display/intel_vrr.c | 25 ++++++++++--------------
 1 file changed, 10 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index b386e62d1664..c395af419ce3 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -236,7 +236,7 @@ intel_vrr_compute_config(struct intel_crtc_state *crtc_state,
 		crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
 	}
 
-	if (intel_dp->as_sdp_supported && crtc_state->vrr.enable) {
+	if (HAS_AS_SDP(display)) {
 		crtc_state->vrr.vsync_start =
 			(crtc_state->hw.adjusted_mode.crtc_vtotal -
 			 crtc_state->hw.adjusted_mode.vsync_start);
@@ -316,6 +316,12 @@ void intel_vrr_set_transcoder_timings(const struct intel_crtc_state *crtc_state)
 		       trans_vrr_ctl(crtc_state));
 	intel_de_write(display, TRANS_VRR_FLIPLINE(display, cpu_transcoder),
 		       crtc_state->vrr.flipline - 1);
+
+	if (HAS_AS_SDP(display))
+		intel_de_write(display,
+			       TRANS_VRR_VSYNC(display, cpu_transcoder),
+			       VRR_VSYNC_END(crtc_state->vrr.vsync_end) |
+			       VRR_VSYNC_START(crtc_state->vrr.vsync_start));
 }
 
 void intel_vrr_send_push(const struct intel_crtc_state *crtc_state)
@@ -352,12 +358,6 @@ void intel_vrr_enable(const struct intel_crtc_state *crtc_state)
 	intel_de_write(display, TRANS_PUSH(display, cpu_transcoder),
 		       TRANS_PUSH_EN);
 
-	if (HAS_AS_SDP(display))
-		intel_de_write(display,
-			       TRANS_VRR_VSYNC(display, cpu_transcoder),
-			       VRR_VSYNC_END(crtc_state->vrr.vsync_end) |
-			       VRR_VSYNC_START(crtc_state->vrr.vsync_start));
-
 	if (crtc_state->cmrr.enable) {
 		intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
 			       VRR_CTL_VRR_ENABLE | VRR_CTL_CMRR_ENABLE |
@@ -382,10 +382,6 @@ void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state)
 				TRANS_VRR_STATUS(display, cpu_transcoder),
 				VRR_STATUS_VRR_EN_LIVE, 1000);
 	intel_de_write(display, TRANS_PUSH(display, cpu_transcoder), 0);
-
-	if (HAS_AS_SDP(display))
-		intel_de_write(display,
-			       TRANS_VRR_VSYNC(display, cpu_transcoder), 0);
 }
 
 void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
@@ -425,10 +421,6 @@ void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
 						     TRANS_VRR_VMAX(display, cpu_transcoder)) + 1;
 		crtc_state->vrr.vmin = intel_de_read(display,
 						     TRANS_VRR_VMIN(display, cpu_transcoder)) + 1;
-	}
-
-	if (crtc_state->vrr.enable) {
-		crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
 
 		if (HAS_AS_SDP(display)) {
 			trans_vrr_vsync =
@@ -440,4 +432,7 @@ void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
 				REG_FIELD_GET(VRR_VSYNC_END_MASK, trans_vrr_vsync);
 		}
 	}
+
+	if (crtc_state->vrr.enable)
+		crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
 }
-- 
2.46.0