[PATCH v2 11/11] drm/i915/display: Add HW state readout for VRR

[Manasi Navare <manasi.d.navare@xxxxxxxxx>]

This functions gets the VRR config from the VRR registers
to match the crtc state variables for VRR.

Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
---
 drivers/gpu/drm/i915/display/intel_display.c |  4 ++++
 drivers/gpu/drm/i915/display/intel_vrr.c     | 17 +++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vrr.h     |  3 +++
 3 files changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index f70cc3b2a1a4..30904e466cb5 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -56,6 +56,7 @@
 #include "display/intel_sdvo.h"
 #include "display/intel_tv.h"
 #include "display/intel_vdsc.h"
+#include "display/intel_vrr.h"
 
 #include "gt/intel_rps.h"
 
@@ -11387,6 +11388,9 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
 		intel_get_transcoder_timings(crtc, pipe_config);
 	}
 
+	if (INTEL_GEN(dev_priv) >= 12)
+		intel_vrr_get_config(crtc, pipe_config);
+
 	intel_get_pipe_src_size(crtc, pipe_config);
 
 	if (IS_HASWELL(dev_priv)) {
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 5075ecb9b5a7..aede2c86cc71 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -141,3 +141,20 @@ void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state)
 		pipe_name(pipe));
 }
 
+void intel_vrr_get_config(struct intel_crtc *crtc,
+			  struct intel_crtc_state *pipe_config)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct drm_i915_private *dev_priv = to_i915(dev);
+	enum pipe pipe = crtc->pipe;
+	u32 trans_vrr_ctl;
+
+	trans_vrr_ctl = intel_de_read(dev_priv, TRANS_VRR_CTL(pipe));
+	pipe_config->vrr.enable = trans_vrr_ctl & VRR_CTL_VRR_ENABLE;
+	if (!pipe_config->vrr.enable)
+		return;
+
+	pipe_config->vrr.vtotalmax = intel_de_read(dev_priv, TRANS_VRR_VMAX(pipe)) + 1;
+	pipe_config->vrr.vtotalmin = intel_de_read(dev_priv, TRANS_VRR_VMIN(pipe)) + 1;
+}
+
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.h b/drivers/gpu/drm/i915/display/intel_vrr.h
index 8c6fd2d1bee5..2c679377c53b 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.h
+++ b/drivers/gpu/drm/i915/display/intel_vrr.h
@@ -13,6 +13,7 @@ struct drm_i915_private;
 struct intel_crtc_state;
 struct intel_encoder;
 struct intel_dp;
+struct intel_crtc;
 
 bool intel_is_vrr_capable(struct drm_connector *connector);
 void intel_vrr_compute_config(struct intel_dp *intel_dp,
@@ -21,5 +22,7 @@ void intel_vrr_enable(struct intel_encoder *encoder,
 		      const struct intel_crtc_state *crtc_state);
 void intel_vrr_send_push(const struct intel_crtc_state *crtc_state);
 void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state);
+void intel_vrr_get_config(struct intel_crtc *crtc,
+			  struct intel_crtc_state *pipe_config);
 
 #endif /* __INTEL_VRR_H__ */
-- 
2.19.1

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