[Intel-gfx] [PATCH 09/11] drm/i915/display/vrr: Disable VRR in modeset disable path

[Manasi Navare]

This patch disables the VRR enable and VRR PUSH
bits in the HW during commit modeset disable sequence.

Thsi disable will happen when the port is disabled
or when the userspace sets VRR prop to false and
requests to disable VRR.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c |  2 ++
 drivers/gpu/drm/i915/display/intel_vrr.c | 22 ++++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vrr.h |  1 +
 3 files changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 391c51979334..565155af3fb9 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3819,6 +3819,8 @@ static void intel_ddi_post_disable(struct intel_atomic_state *state,
 
 		intel_disable_pipe(old_crtc_state);
 
+		intel_vrr_disable(old_crtc_state);
+
 		intel_ddi_disable_transcoder_func(old_crtc_state);
 
 		intel_dsc_disable(old_crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index ec1ce88e869c..5075ecb9b5a7 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -119,3 +119,25 @@ void intel_vrr_send_push(const struct intel_crtc_state *crtc_state)
 		pipe_name(pipe));
 }
 
+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);
+	enum pipe pipe = crtc->pipe;
+	u32 trans_vrr_ctl = 0, trans_push = 0;
+
+	if (!old_crtc_state->vrr.enable)
+		return;
+
+	trans_vrr_ctl = intel_de_read(dev_priv, TRANS_VRR_CTL(pipe));
+	trans_vrr_ctl &= ~(VRR_CTL_FLIP_LINE_EN | VRR_CTL_VRR_ENABLE);
+	intel_de_write(dev_priv, TRANS_VRR_CTL(pipe), trans_vrr_ctl);
+
+	trans_push = intel_de_read(dev_priv, TRANS_PUSH(pipe));
+	trans_push &= ~TRANS_PUSH_EN;
+	intel_de_write(dev_priv, TRANS_PUSH(pipe), trans_push);
+
+	drm_dbg(&dev_priv->drm, "Disabling VRR on Pipe (%c)\n",
+		pipe_name(pipe));
+}
+
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.h b/drivers/gpu/drm/i915/display/intel_vrr.h
index a6b78e1676cb..8c6fd2d1bee5 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.h
+++ b/drivers/gpu/drm/i915/display/intel_vrr.h
@@ -20,5 +20,6 @@ void intel_vrr_compute_config(struct intel_dp *intel_dp,
 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);
 
 #endif /* __INTEL_VRR_H__ */
-- 
2.19.1