[PATCH 08/16] drm/i915/vrr: Always set vrr vmax/vmin/flipline in vrr_{enable/disable}

[Ankit Nautiyal <ankit.k.nautiyal@intel.com>]

For platforms for which vrr timing generator is always set, VRR_CTL
enable bit does not need to toggle, so modify the vrr_{enable/disable}
for this.
At the moment the helper intel_vrr_always_use_vrr_tg() return false for
all cases. This will be set later when all other bits are in place.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_vrr.c | 40 ++++++++++++++++--------
 1 file changed, 27 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 34c02d66167e..3f610e382883 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -558,6 +558,16 @@ bool intel_vrr_is_push_sent(const struct intel_crtc_state *crtc_state)
 	return intel_de_read(display, TRANS_PUSH(display, cpu_transcoder)) & TRANS_PUSH_SEND;
 }
 
+static
+bool intel_vrr_always_use_vrr_tg(struct intel_display *display)
+{
+	if (!HAS_VRR(display))
+		return false;
+
+	/* #TODO return true for platforms supporting fixed_rr */
+	return false;
+}
+
 void intel_vrr_enable(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_display *display = to_intel_display(crtc_state);
@@ -576,13 +586,15 @@ void intel_vrr_enable(const struct intel_crtc_state *crtc_state)
 	intel_de_write(display, TRANS_PUSH(display, cpu_transcoder),
 		       TRANS_PUSH_EN);
 
-	if (crtc_state->cmrr.enable) {
-		intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
-			       VRR_CTL_VRR_ENABLE | VRR_CTL_CMRR_ENABLE |
-			       trans_vrr_ctl(crtc_state));
-	} else {
-		intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
-			       VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state));
+	if (!intel_vrr_always_use_vrr_tg(display)) {
+		if (crtc_state->cmrr.enable) {
+			intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
+				       VRR_CTL_VRR_ENABLE | VRR_CTL_CMRR_ENABLE |
+				       trans_vrr_ctl(crtc_state));
+		} else {
+			intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
+				       VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state));
+		}
 	}
 }
 
@@ -594,12 +606,14 @@ void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state)
 	if (!old_crtc_state->vrr.enable)
 		return;
 
-	intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
-		       trans_vrr_ctl(old_crtc_state));
-	intel_de_wait_for_clear(display,
-				TRANS_VRR_STATUS(display, cpu_transcoder),
-				VRR_STATUS_VRR_EN_LIVE, 1000);
-	intel_de_write(display, TRANS_PUSH(display, cpu_transcoder), 0);
+	if (!intel_vrr_always_use_vrr_tg(display)) {
+		intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
+			       trans_vrr_ctl(old_crtc_state));
+		intel_de_wait_for_clear(display,
+					TRANS_VRR_STATUS(display, cpu_transcoder),
+					VRR_STATUS_VRR_EN_LIVE, 1000);
+		intel_de_write(display, TRANS_PUSH(display, cpu_transcoder), 0);
+	}
 
 	intel_vrr_set_fixed_rr_timings(old_crtc_state);
 }
-- 
2.45.2