1 files changed, 543 insertions, 80 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 5d905f932cb4..c6565baf815a 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -4,16 +4,22 @@
  *
  */
 
-#include "i915_drv.h"
+#include <drm/drm_print.h>
+
 #include "i915_reg.h"
 #include "intel_de.h"
 #include "intel_display_types.h"
+#include "intel_dp.h"
 #include "intel_vrr.h"
+#include "intel_vrr_regs.h"
+
+#define FIXED_POINT_PRECISION		100
+#define CMRR_PRECISION_TOLERANCE	10
 
 bool intel_vrr_is_capable(struct intel_connector *connector)
 {
+	struct intel_display *display = to_intel_display(connector);
 	const struct drm_display_info *info = &connector->base.display_info;
-	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	struct intel_dp *intel_dp;
 
 	/*
@@ -28,6 +34,8 @@ bool intel_vrr_is_capable(struct intel_connector *connector)
 			return false;
 		fallthrough;
 	case DRM_MODE_CONNECTOR_DisplayPort:
+		if (connector->mst.dp)
+			return false;
 		intel_dp = intel_attached_dp(connector);
 
 		if (!drm_dp_sink_can_do_video_without_timing_msa(intel_dp->dpcd))
@@ -38,7 +46,7 @@ bool intel_vrr_is_capable(struct intel_connector *connector)
 		return false;
 	}
 
-	return HAS_VRR(i915) &&
+	return HAS_VRR(display) &&
 		info->monitor_range.max_vfreq - info->monitor_range.min_vfreq > 10;
 }
 
@@ -51,6 +59,11 @@ bool intel_vrr_is_in_range(struct intel_connector *connector, int vrefresh)
 		vrefresh <= info->monitor_range.max_vfreq;
 }
 
+bool intel_vrr_possible(const struct intel_crtc_state *crtc_state)
+{
+	return crtc_state->vrr.flipline;
+}
+
 void
 intel_vrr_check_modeset(struct intel_atomic_state *state)
 {
@@ -66,6 +79,46 @@ intel_vrr_check_modeset(struct intel_atomic_state *state)
 	}
 }
 
+static int intel_vrr_real_vblank_delay(const struct intel_crtc_state *crtc_state)
+{
+	return crtc_state->hw.adjusted_mode.crtc_vblank_start -
+		crtc_state->hw.adjusted_mode.crtc_vdisplay;
+}
+
+static int intel_vrr_extra_vblank_delay(struct intel_display *display)
+{
+	/*
+	 * On ICL/TGL VRR hardware inserts one extra scanline
+	 * just after vactive, which pushes the vmin decision
+	 * boundary ahead accordingly. We'll include the extra
+	 * scanline in our vblank delay estimates to make sure
+	 * that we never underestimate how long we have until
+	 * the delayed vblank has passed.
+	 */
+	return DISPLAY_VER(display) < 13 ? 1 : 0;
+}
+
+int intel_vrr_vblank_delay(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+
+	return intel_vrr_real_vblank_delay(crtc_state) +
+		intel_vrr_extra_vblank_delay(display);
+}
+
+static int intel_vrr_flipline_offset(struct intel_display *display)
+{
+	/* ICL/TGL hardware imposes flipline>=vmin+1 */
+	return DISPLAY_VER(display) < 13 ? 1 : 0;
+}
+
+static int intel_vrr_vmin_flipline(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+
+	return crtc_state->vrr.vmin + intel_vrr_flipline_offset(display);
+}
+
 /*
  * Without VRR registers get latched at:
  *  vblank_start
@@ -84,95 +137,317 @@ intel_vrr_check_modeset(struct intel_atomic_state *state)
  */
 static int intel_vrr_vblank_exit_length(const struct intel_crtc_state *crtc_state)
 {
-	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	struct intel_display *display = to_intel_display(crtc_state);
 
-	if (DISPLAY_VER(i915) >= 13)
+	if (DISPLAY_VER(display) >= 13)
 		return crtc_state->vrr.guardband;
 	else
-		/* The hw imposes the extra scanline before frame start */
+		/* hardware imposes one extra scanline somewhere */
 		return crtc_state->vrr.pipeline_full + crtc_state->framestart_delay + 1;
 }
 
+int intel_vrr_vmin_vtotal(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+
+	/* Min vblank actually determined by flipline */
+	if (DISPLAY_VER(display) >= 13)
+		return intel_vrr_vmin_flipline(crtc_state);
+	else
+		return intel_vrr_vmin_flipline(crtc_state) +
+			intel_vrr_real_vblank_delay(crtc_state);
+}
+
+int intel_vrr_vmax_vtotal(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+
+	if (DISPLAY_VER(display) >= 13)
+		return crtc_state->vrr.vmax;
+	else
+		return crtc_state->vrr.vmax +
+			intel_vrr_real_vblank_delay(crtc_state);
+}
+
 int intel_vrr_vmin_vblank_start(const struct intel_crtc_state *crtc_state)
 {
-	/* Min vblank actually determined by flipline that is always >=vmin+1 */
-	return crtc_state->vrr.vmin + 1 - intel_vrr_vblank_exit_length(crtc_state);
+	return intel_vrr_vmin_vtotal(crtc_state) - intel_vrr_vblank_exit_length(crtc_state);
 }
 
 int intel_vrr_vmax_vblank_start(const struct intel_crtc_state *crtc_state)
 {
-	return crtc_state->vrr.vmax - intel_vrr_vblank_exit_length(crtc_state);
+	return intel_vrr_vmax_vtotal(crtc_state) - intel_vrr_vblank_exit_length(crtc_state);
+}
+
+static bool
+is_cmrr_frac_required(struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	int calculated_refresh_k, actual_refresh_k, pixel_clock_per_line;
+	struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+
+	/* Avoid CMRR for now till we have VRR with fixed timings working */
+	if (!HAS_CMRR(display) || true)
+		return false;
+
+	actual_refresh_k =
+		drm_mode_vrefresh(adjusted_mode) * FIXED_POINT_PRECISION;
+	pixel_clock_per_line =
+		adjusted_mode->crtc_clock * 1000 / adjusted_mode->crtc_htotal;
+	calculated_refresh_k =
+		pixel_clock_per_line * FIXED_POINT_PRECISION / adjusted_mode->crtc_vtotal;
+
+	if ((actual_refresh_k - calculated_refresh_k) < CMRR_PRECISION_TOLERANCE)
+		return false;
+
+	return true;
+}
+
+static unsigned int
+cmrr_get_vtotal(struct intel_crtc_state *crtc_state, bool video_mode_required)
+{
+	int multiplier_m = 1, multiplier_n = 1, vtotal, desired_refresh_rate;
+	u64 adjusted_pixel_rate;
+	struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
+
+	desired_refresh_rate = drm_mode_vrefresh(adjusted_mode);
+
+	if (video_mode_required) {
+		multiplier_m = 1001;
+		multiplier_n = 1000;
+	}
+
+	crtc_state->cmrr.cmrr_n = mul_u32_u32(desired_refresh_rate * adjusted_mode->crtc_htotal,
+					      multiplier_n);
+	vtotal = DIV_ROUND_UP_ULL(mul_u32_u32(adjusted_mode->crtc_clock * 1000, multiplier_n),
+				  crtc_state->cmrr.cmrr_n);
+	adjusted_pixel_rate = mul_u32_u32(adjusted_mode->crtc_clock * 1000, multiplier_m);
+	crtc_state->cmrr.cmrr_m = do_div(adjusted_pixel_rate, crtc_state->cmrr.cmrr_n);
+
+	return vtotal;
+}
+
+static
+void intel_vrr_compute_cmrr_timings(struct intel_crtc_state *crtc_state)
+{
+	crtc_state->cmrr.enable = true;
+	/*
+	 * TODO: Compute precise target refresh rate to determine
+	 * if video_mode_required should be true. Currently set to
+	 * false due to uncertainty about the precise target
+	 * refresh Rate.
+	 */
+	crtc_state->vrr.vmax = cmrr_get_vtotal(crtc_state, false);
+	crtc_state->vrr.vmin = crtc_state->vrr.vmax;
+	crtc_state->vrr.flipline = crtc_state->vrr.vmin;
+	crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
+}
+
+static
+void intel_vrr_compute_vrr_timings(struct intel_crtc_state *crtc_state)
+{
+	crtc_state->vrr.enable = true;
+	crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
+}
+
+/*
+ * For fixed refresh rate mode Vmin, Vmax and Flipline all are set to
+ * Vtotal value.
+ */
+static
+int intel_vrr_fixed_rr_vtotal(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	int crtc_vtotal = crtc_state->hw.adjusted_mode.crtc_vtotal;
+
+	if (DISPLAY_VER(display) >= 13)
+		return crtc_vtotal;
+	else
+		return crtc_vtotal -
+			intel_vrr_real_vblank_delay(crtc_state);
+}
+
+static
+int intel_vrr_fixed_rr_vmax(const struct intel_crtc_state *crtc_state)
+{
+	return intel_vrr_fixed_rr_vtotal(crtc_state);
+}
+
+static
+int intel_vrr_fixed_rr_vmin(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+
+	return intel_vrr_fixed_rr_vtotal(crtc_state) -
+		intel_vrr_flipline_offset(display);
+}
+
+static
+int intel_vrr_fixed_rr_flipline(const struct intel_crtc_state *crtc_state)
+{
+	return intel_vrr_fixed_rr_vtotal(crtc_state);
+}
+
+void intel_vrr_set_fixed_rr_timings(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+	if (!intel_vrr_possible(crtc_state))
+		return;
+
+	intel_de_write(display, TRANS_VRR_VMIN(display, cpu_transcoder),
+		       intel_vrr_fixed_rr_vmin(crtc_state) - 1);
+	intel_de_write(display, TRANS_VRR_VMAX(display, cpu_transcoder),
+		       intel_vrr_fixed_rr_vmax(crtc_state) - 1);
+	intel_de_write(display, TRANS_VRR_FLIPLINE(display, cpu_transcoder),
+		       intel_vrr_fixed_rr_flipline(crtc_state) - 1);
+}
+
+static
+void intel_vrr_compute_fixed_rr_timings(struct intel_crtc_state *crtc_state)
+{
+	/*
+	 * For fixed rr,  vmin = vmax = flipline.
+	 * vmin is already set to crtc_vtotal set vmax and flipline the same.
+	 */
+	crtc_state->vrr.vmax = crtc_state->hw.adjusted_mode.crtc_vtotal;
+	crtc_state->vrr.flipline = crtc_state->hw.adjusted_mode.crtc_vtotal;
+}
+
+static
+int intel_vrr_compute_vmin(struct intel_crtc_state *crtc_state)
+{
+	/*
+	 * To make fixed rr and vrr work seamless the guardband/pipeline full
+	 * should be set such that it satisfies both the fixed and variable
+	 * timings.
+	 * For this set the vmin as crtc_vtotal. With this we never need to
+	 * change anything to do with the guardband.
+	 */
+	return crtc_state->hw.adjusted_mode.crtc_vtotal;
+}
+
+static
+int intel_vrr_compute_vmax(struct intel_connector *connector,
+			   const struct drm_display_mode *adjusted_mode)
+{
+	const struct drm_display_info *info = &connector->base.display_info;
+	int vmax;
+
+	vmax = adjusted_mode->crtc_clock * 1000 /
+		(adjusted_mode->crtc_htotal * info->monitor_range.min_vfreq);
+	vmax = max_t(int, vmax, adjusted_mode->crtc_vtotal);
+
+	return vmax;
 }
 
 void
 intel_vrr_compute_config(struct intel_crtc_state *crtc_state,
 			 struct drm_connector_state *conn_state)
 {
-	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	struct intel_display *display = to_intel_display(crtc_state);
 	struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
+	struct intel_dp *intel_dp = intel_attached_dp(connector);
+	bool is_edp = intel_dp_is_edp(intel_dp);
 	struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
-	const struct drm_display_info *info = &connector->base.display_info;
 	int vmin, vmax;
 
+	if (!HAS_VRR(display))
+		return;
+
 	if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
 		return;
 
 	crtc_state->vrr.in_range =
 		intel_vrr_is_in_range(connector, drm_mode_vrefresh(adjusted_mode));
-	if (!crtc_state->vrr.in_range)
-		return;
 
-	if (HAS_LRR(i915))
-		crtc_state->update_lrr = true;
+	/*
+	 * Allow fixed refresh rate with VRR Timing Generator.
+	 * For now set the vrr.in_range to 0, to allow fixed_rr but skip actual
+	 * VRR and LRR.
+	 * #TODO For actual VRR with joiner, we need to figure out how to
+	 * correctly sequence transcoder level stuff vs. pipe level stuff
+	 * in the commit.
+	 */
+	if (crtc_state->joiner_pipes)
+		crtc_state->vrr.in_range = false;
 
-	vmin = DIV_ROUND_UP(adjusted_mode->crtc_clock * 1000,
-			    adjusted_mode->crtc_htotal * info->monitor_range.max_vfreq);
-	vmax = adjusted_mode->crtc_clock * 1000 /
-		(adjusted_mode->crtc_htotal * info->monitor_range.min_vfreq);
+	vmin = intel_vrr_compute_vmin(crtc_state);
 
-	vmin = max_t(int, vmin, adjusted_mode->crtc_vtotal);
-	vmax = max_t(int, vmax, adjusted_mode->crtc_vtotal);
+	if (crtc_state->vrr.in_range) {
+		if (HAS_LRR(display))
+			crtc_state->update_lrr = true;
+		vmax = intel_vrr_compute_vmax(connector, adjusted_mode);
+	} else {
+		vmax = vmin;
+	}
 
-	if (vmin >= vmax)
-		return;
+	crtc_state->vrr.vmin = vmin;
+	crtc_state->vrr.vmax = vmax;
+
+	crtc_state->vrr.flipline = crtc_state->vrr.vmin;
+
+	if (crtc_state->uapi.vrr_enabled && vmin < vmax)
+		intel_vrr_compute_vrr_timings(crtc_state);
+	else if (is_cmrr_frac_required(crtc_state) && is_edp)
+		intel_vrr_compute_cmrr_timings(crtc_state);
+	else
+		intel_vrr_compute_fixed_rr_timings(crtc_state);
 
 	/*
 	 * flipline determines the min vblank length the hardware will
-	 * generate, and flipline>=vmin+1, hence we reduce vmin by one
-	 * to make sure we can get the actual min vblank length.
+	 * generate, and on ICL/TGL flipline>=vmin+1, hence we reduce
+	 * vmin by one to make sure we can get the actual min vblank length.
 	 */
-	crtc_state->vrr.vmin = vmin - 1;
-	crtc_state->vrr.vmax = vmax;
+	crtc_state->vrr.vmin -= intel_vrr_flipline_offset(display);
+
+	if (HAS_AS_SDP(display)) {
+		crtc_state->vrr.vsync_start =
+			(crtc_state->hw.adjusted_mode.crtc_vtotal -
+			 crtc_state->hw.adjusted_mode.vsync_start);
+		crtc_state->vrr.vsync_end =
+			(crtc_state->hw.adjusted_mode.crtc_vtotal -
+			 crtc_state->hw.adjusted_mode.vsync_end);
+	}
+}
 
-	crtc_state->vrr.flipline = crtc_state->vrr.vmin + 1;
+void intel_vrr_compute_config_late(struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
 
-	/*
-	 * For XE_LPD+, we use guardband and pipeline override
-	 * is deprecated.
-	 */
-	if (DISPLAY_VER(i915) >= 13) {
+	if (!intel_vrr_possible(crtc_state))
+		return;
+
+	if (DISPLAY_VER(display) >= 13) {
 		crtc_state->vrr.guardband =
-			crtc_state->vrr.vmin + 1 - adjusted_mode->crtc_vblank_start;
+			crtc_state->vrr.vmin - adjusted_mode->crtc_vblank_start;
 	} else {
+		/* hardware imposes one extra scanline somewhere */
 		crtc_state->vrr.pipeline_full =
 			min(255, crtc_state->vrr.vmin - adjusted_mode->crtc_vblank_start -
 			    crtc_state->framestart_delay - 1);
-	}
 
-	if (crtc_state->uapi.vrr_enabled) {
-		crtc_state->vrr.enable = true;
-		crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
+		/*
+		 * vmin/vmax/flipline also need to be adjusted by
+		 * the vblank delay to maintain correct vtotals.
+		 */
+		crtc_state->vrr.vmin -= intel_vrr_real_vblank_delay(crtc_state);
+		crtc_state->vrr.vmax -= intel_vrr_real_vblank_delay(crtc_state);
+		crtc_state->vrr.flipline -= intel_vrr_real_vblank_delay(crtc_state);
 	}
 }
 
 static u32 trans_vrr_ctl(const struct intel_crtc_state *crtc_state)
 {
-	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+	struct intel_display *display = to_intel_display(crtc_state);
 
-	if (DISPLAY_VER(i915) >= 13)
+	if (DISPLAY_VER(display) >= 14)
+		return VRR_CTL_FLIP_LINE_EN |
+			XELPD_VRR_CTL_VRR_GUARDBAND(crtc_state->vrr.guardband);
+	else if (DISPLAY_VER(display) >= 13)
 		return VRR_CTL_IGN_MAX_SHIFT | VRR_CTL_FLIP_LINE_EN |
 			XELPD_VRR_CTL_VRR_GUARDBAND(crtc_state->vrr.guardband);
 	else
@@ -183,93 +458,246 @@ static u32 trans_vrr_ctl(const struct intel_crtc_state *crtc_state)
 
 void intel_vrr_set_transcoder_timings(const struct intel_crtc_state *crtc_state)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
+	struct intel_display *display = to_intel_display(crtc_state);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
 	/*
-	 * TRANS_SET_CONTEXT_LATENCY with VRR enabled
-	 * requires this chicken bit on ADL/DG2.
+	 * This bit seems to have two meanings depending on the platform:
+	 * TGL: generate VRR "safe window" for DSB vblank waits
+	 * ADL/DG2: make TRANS_SET_CONTEXT_LATENCY effective with VRR
 	 */
-	if (DISPLAY_VER(dev_priv) == 13)
-		intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder),
+	if (IS_DISPLAY_VER(display, 12, 13))
+		intel_de_rmw(display, CHICKEN_TRANS(display, cpu_transcoder),
 			     0, PIPE_VBLANK_WITH_DELAY);
 
-	if (!crtc_state->vrr.flipline) {
-		intel_de_write(dev_priv, TRANS_VRR_CTL(cpu_transcoder), 0);
+	if (!intel_vrr_possible(crtc_state)) {
+		intel_de_write(display,
+			       TRANS_VRR_CTL(display, cpu_transcoder), 0);
 		return;
 	}
 
-	intel_de_write(dev_priv, TRANS_VRR_VMIN(cpu_transcoder), crtc_state->vrr.vmin - 1);
-	intel_de_write(dev_priv, TRANS_VRR_VMAX(cpu_transcoder), crtc_state->vrr.vmax - 1);
-	intel_de_write(dev_priv, TRANS_VRR_CTL(cpu_transcoder), trans_vrr_ctl(crtc_state));
-	intel_de_write(dev_priv, TRANS_VRR_FLIPLINE(cpu_transcoder), crtc_state->vrr.flipline - 1);
+	if (crtc_state->cmrr.enable) {
+		intel_de_write(display, TRANS_CMRR_M_HI(display, cpu_transcoder),
+			       upper_32_bits(crtc_state->cmrr.cmrr_m));
+		intel_de_write(display, TRANS_CMRR_M_LO(display, cpu_transcoder),
+			       lower_32_bits(crtc_state->cmrr.cmrr_m));
+		intel_de_write(display, TRANS_CMRR_N_HI(display, cpu_transcoder),
+			       upper_32_bits(crtc_state->cmrr.cmrr_n));
+		intel_de_write(display, TRANS_CMRR_N_LO(display, cpu_transcoder),
+			       lower_32_bits(crtc_state->cmrr.cmrr_n));
+	}
+
+	intel_vrr_set_fixed_rr_timings(crtc_state);
+
+	if (!intel_vrr_always_use_vrr_tg(display) && !crtc_state->vrr.enable)
+		intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
+			       trans_vrr_ctl(crtc_state));
+
+	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(struct intel_dsb *dsb,
+			 const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+	if (!crtc_state->vrr.enable)
+		return;
+
+	if (dsb)
+		intel_dsb_nonpost_start(dsb);
+
+	intel_de_write_dsb(display, dsb,
+			   TRANS_PUSH(display, cpu_transcoder),
+			   TRANS_PUSH_EN | TRANS_PUSH_SEND);
+
+	if (dsb)
+		intel_dsb_nonpost_end(dsb);
 }
 
-void intel_vrr_send_push(const struct intel_crtc_state *crtc_state)
+void intel_vrr_check_push_sent(struct intel_dsb *dsb,
+			       const struct intel_crtc_state *crtc_state)
 {
+	struct intel_display *display = to_intel_display(crtc_state);
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
 	if (!crtc_state->vrr.enable)
 		return;
 
-	intel_de_write(dev_priv, TRANS_PUSH(cpu_transcoder),
-		       TRANS_PUSH_EN | TRANS_PUSH_SEND);
+	/*
+	 * Make sure the push send bit has cleared. This should
+	 * already be the case as long as the caller makes sure
+	 * this is called after the delayed vblank has occurred.
+	 */
+	if (dsb) {
+		int wait_us, count;
+
+		wait_us = 2;
+		count = 1;
+
+		/*
+		 * If the bit hasn't cleared the DSB will
+		 * raise the poll error interrupt.
+		 */
+		intel_dsb_poll(dsb, TRANS_PUSH(display, cpu_transcoder),
+			       TRANS_PUSH_SEND, 0, wait_us, count);
+	} else {
+		if (intel_vrr_is_push_sent(crtc_state))
+			drm_err(display->drm, "[CRTC:%d:%s] VRR push send still pending\n",
+				crtc->base.base.id, crtc->base.name);
+	}
 }
 
 bool intel_vrr_is_push_sent(const struct intel_crtc_state *crtc_state)
 {
-	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_display *display = to_intel_display(crtc_state);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
 	if (!crtc_state->vrr.enable)
 		return false;
 
-	return intel_de_read(dev_priv, TRANS_PUSH(cpu_transcoder)) & TRANS_PUSH_SEND;
+	return intel_de_read(display, TRANS_PUSH(display, cpu_transcoder)) & TRANS_PUSH_SEND;
+}
+
+bool intel_vrr_always_use_vrr_tg(struct intel_display *display)
+{
+	if (!HAS_VRR(display))
+		return false;
+
+	if (DISPLAY_VER(display) >= 30)
+		return true;
+
+	return false;
 }
 
 void intel_vrr_enable(const struct intel_crtc_state *crtc_state)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
+	struct intel_display *display = to_intel_display(crtc_state);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
 	if (!crtc_state->vrr.enable)
 		return;
 
-	intel_de_write(dev_priv, TRANS_PUSH(cpu_transcoder), TRANS_PUSH_EN);
-	intel_de_write(dev_priv, TRANS_VRR_CTL(cpu_transcoder),
-		       VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state));
+	intel_de_write(display, TRANS_VRR_VMIN(display, cpu_transcoder),
+		       crtc_state->vrr.vmin - 1);
+	intel_de_write(display, TRANS_VRR_VMAX(display, cpu_transcoder),
+		       crtc_state->vrr.vmax - 1);
+	intel_de_write(display, TRANS_VRR_FLIPLINE(display, cpu_transcoder),
+		       crtc_state->vrr.flipline - 1);
+
+	intel_de_write(display, TRANS_PUSH(display, cpu_transcoder),
+		       TRANS_PUSH_EN);
+
+	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));
+		}
+	}
 }
 
 void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state)
 {
-	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_display *display = to_intel_display(old_crtc_state);
 	enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
 
 	if (!old_crtc_state->vrr.enable)
 		return;
 
-	intel_de_write(dev_priv, TRANS_VRR_CTL(cpu_transcoder),
-		       trans_vrr_ctl(old_crtc_state));
-	intel_de_wait_for_clear(dev_priv, TRANS_VRR_STATUS(cpu_transcoder),
-				VRR_STATUS_VRR_EN_LIVE, 1000);
-	intel_de_write(dev_priv, TRANS_PUSH(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);
 }
 
-void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
+void intel_vrr_transcoder_enable(const struct intel_crtc_state *crtc_state)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
+	struct intel_display *display = to_intel_display(crtc_state);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
-	u32 trans_vrr_ctl;
 
-	trans_vrr_ctl = intel_de_read(dev_priv, TRANS_VRR_CTL(cpu_transcoder));
+	if (!HAS_VRR(display))
+		return;
+
+	if (!intel_vrr_possible(crtc_state))
+		return;
+
+	if (!intel_vrr_always_use_vrr_tg(display)) {
+		intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
+			       trans_vrr_ctl(crtc_state));
+		return;
+	}
+
+	intel_de_write(display, TRANS_PUSH(display, cpu_transcoder),
+		       TRANS_PUSH_EN);
 
-	crtc_state->vrr.enable = trans_vrr_ctl & VRR_CTL_VRR_ENABLE;
+	intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
+		       VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state));
+}
 
-	if (DISPLAY_VER(dev_priv) >= 13)
+void intel_vrr_transcoder_disable(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+	if (!HAS_VRR(display))
+		return;
+
+	if (!intel_vrr_possible(crtc_state))
+		return;
+
+	intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder), 0);
+
+	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);
+}
+
+bool intel_vrr_is_fixed_rr(const struct intel_crtc_state *crtc_state)
+{
+	return crtc_state->vrr.flipline &&
+	       crtc_state->vrr.flipline == crtc_state->vrr.vmax &&
+	       crtc_state->vrr.flipline == intel_vrr_vmin_flipline(crtc_state);
+}
+
+void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	u32 trans_vrr_ctl, trans_vrr_vsync;
+	bool vrr_enable;
+
+	trans_vrr_ctl = intel_de_read(display,
+				      TRANS_VRR_CTL(display, cpu_transcoder));
+
+	if (HAS_CMRR(display))
+		crtc_state->cmrr.enable = (trans_vrr_ctl & VRR_CTL_CMRR_ENABLE);
+
+	if (crtc_state->cmrr.enable) {
+		crtc_state->cmrr.cmrr_n =
+			intel_de_read64_2x32(display, TRANS_CMRR_N_LO(display, cpu_transcoder),
+					     TRANS_CMRR_N_HI(display, cpu_transcoder));
+		crtc_state->cmrr.cmrr_m =
+			intel_de_read64_2x32(display, TRANS_CMRR_M_LO(display, cpu_transcoder),
+					     TRANS_CMRR_M_HI(display, cpu_transcoder));
+	}
+
+	if (DISPLAY_VER(display) >= 13)
 		crtc_state->vrr.guardband =
 			REG_FIELD_GET(XELPD_VRR_CTL_VRR_GUARDBAND_MASK, trans_vrr_ctl);
 	else
@@ -278,11 +706,46 @@ void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
 				REG_FIELD_GET(VRR_CTL_PIPELINE_FULL_MASK, trans_vrr_ctl);
 
 	if (trans_vrr_ctl & VRR_CTL_FLIP_LINE_EN) {
-		crtc_state->vrr.flipline = intel_de_read(dev_priv, TRANS_VRR_FLIPLINE(cpu_transcoder)) + 1;
-		crtc_state->vrr.vmax = intel_de_read(dev_priv, TRANS_VRR_VMAX(cpu_transcoder)) + 1;
-		crtc_state->vrr.vmin = intel_de_read(dev_priv, TRANS_VRR_VMIN(cpu_transcoder)) + 1;
+		crtc_state->vrr.flipline = intel_de_read(display,
+							 TRANS_VRR_FLIPLINE(display, cpu_transcoder)) + 1;
+		crtc_state->vrr.vmax = intel_de_read(display,
+						     TRANS_VRR_VMAX(display, cpu_transcoder)) + 1;
+		crtc_state->vrr.vmin = intel_de_read(display,
+						     TRANS_VRR_VMIN(display, cpu_transcoder)) + 1;
+
+		/*
+		 * For platforms that always use VRR Timing Generator, the VTOTAL.Vtotal
+		 * bits are not filled. Since for these platforms TRAN_VMIN is always
+		 * filled with crtc_vtotal, use TRAN_VRR_VMIN to get the vtotal for
+		 * adjusted_mode.
+		 */
+		if (intel_vrr_always_use_vrr_tg(display))
+			crtc_state->hw.adjusted_mode.crtc_vtotal =
+				intel_vrr_vmin_vtotal(crtc_state);
+
+		if (HAS_AS_SDP(display)) {
+			trans_vrr_vsync =
+				intel_de_read(display,
+					      TRANS_VRR_VSYNC(display, cpu_transcoder));
+			crtc_state->vrr.vsync_start =
+				REG_FIELD_GET(VRR_VSYNC_START_MASK, trans_vrr_vsync);
+			crtc_state->vrr.vsync_end =
+				REG_FIELD_GET(VRR_VSYNC_END_MASK, trans_vrr_vsync);
+		}
 	}
 
+	vrr_enable = trans_vrr_ctl & VRR_CTL_VRR_ENABLE;
+
+	if (intel_vrr_always_use_vrr_tg(display))
+		crtc_state->vrr.enable = vrr_enable && !intel_vrr_is_fixed_rr(crtc_state);
+	else
+		crtc_state->vrr.enable = vrr_enable;
+
+	/*
+	 * #TODO: For Both VRR and CMRR the flag I915_MODE_FLAG_VRR is set for mode_flags.
+	 * Since CMRR is currently disabled, set this flag for VRR for now.
+	 * Need to keep this in mind while re-enabling CMRR.
+	 */
 	if (crtc_state->vrr.enable)
 		crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
 }