[Intel-gfx] [PATCH v3 9/9] drm/i915/display: Add HW state readout for VRR

[Manasi Navare]

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

v2:
* Rebase (Manasi)
* Use HAS_VRR (Jani N)

Cc: Jani Nikula <jani.nikula at linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c |  3 +++
 drivers/gpu/drm/i915/display/intel_vrr.c     | 17 +++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vrr.h     |  3 +++
 3 files changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index fa452eb3adb8..d5b934ecb30c 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -11449,6 +11449,9 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
 		intel_get_transcoder_timings(crtc, pipe_config);
 	}
 
+	if (HAS_VRR(dev_priv))
+		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 a3edfadb50f1..9b867f629f86 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -149,3 +149,20 @@ void intel_vrr_disable(const struct intel_crtc_state *old_crtc_state)
 	drm_dbg_kms(&dev_priv->drm, "Disabling VRR on pipe %c\n",
 		    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 5d3def024006..ae01eef6947f 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.h
+++ b/drivers/gpu/drm/i915/display/intel_vrr.h
@@ -14,6 +14,7 @@ struct intel_crtc;
 struct intel_crtc_state;
 struct intel_dp;
 struct intel_encoder;
+struct intel_crtc;
 
 bool intel_vrr_is_capable(struct drm_connector *connector);
 void intel_vrr_check_modeset(struct intel_atomic_state *state);
@@ -23,5 +24,7 @@ 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