[PATCH v1 4/8] drm/i915/vrr: Add functions to read out vmin/vmax stuff

[Mitul Golani]

Calculate delayed vblank start position with the help of added
vmin/vmax stuff for next frame and final computation.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_vrr.c | 55 +++++++++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_vrr.h |  5 +++
 2 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index afa1728837d2..03405c274b8c 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -156,7 +156,6 @@ static int intel_vrr_vtotal(const struct intel_crtc_state *crtc_state, int vmin_
 		return vmin_vmax + intel_vrr_real_vblank_delay(crtc_state);
 }
 
-
 static int intel_vrr_vblank_start(const struct intel_crtc_state *crtc_state,
 	int vmin_vmax)
 {
@@ -747,3 +746,57 @@ void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
 	if (crtc_state->vrr.enable)
 		crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
 }
+
+int intel_vrr_dcb_vmin_vblank_start_next(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	u32 tmp;
+
+	tmp = intel_de_read(display, TRANS_VRR_DCB_ADJ_FLIPLINE_CFG(cpu_transcoder));
+
+	if (REG_FIELD_GET(VRR_DCB_ADJ_FLIPLINE_CNT_MASK, tmp) == 0)
+		return -1;
+
+	return intel_vrr_vblank_start(crtc_state,
+				      REG_FIELD_GET(VRR_DCB_ADJ_FLIPLINE_MASK, tmp) + 1);
+}
+
+int intel_vrr_dcb_vmax_vblank_start_next(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	u32 tmp;
+
+	tmp = intel_de_read(display, TRANS_VRR_DCB_ADJ_VMAX_CFG(cpu_transcoder));
+
+	if (REG_FIELD_GET(VRR_DCB_ADJ_VMAX_CNT_MASK, tmp) == 0)
+		return -1;
+
+	return intel_vrr_vblank_start(crtc_state,
+				      REG_FIELD_GET(VRR_DCB_ADJ_VMAX_MASK, tmp) + 1);
+}
+
+int intel_vrr_dcb_vmin_vblank_start_final(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	u32 tmp;
+
+	tmp = intel_de_read(display, TRANS_VRR_FLIPLINE_DCB(cpu_transcoder));
+
+	return intel_vrr_vblank_start(crtc_state,
+				      REG_FIELD_GET(VRR_FLIPLINE_DCB_MASK, tmp) + 1);
+}
+
+int intel_vrr_dcb_vmax_vblank_start_final(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	u32 tmp;
+
+	tmp = intel_de_read(display, TRANS_VRR_VMAX_DCB(cpu_transcoder));
+
+	return intel_vrr_vblank_start(crtc_state,
+				      REG_FIELD_GET(VRR_VMAX_DCB_MASK, tmp) + 1);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.h b/drivers/gpu/drm/i915/display/intel_vrr.h
index 38bf9996b883..e62b8b50aec6 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.h
+++ b/drivers/gpu/drm/i915/display/intel_vrr.h
@@ -42,4 +42,9 @@ void intel_vrr_transcoder_disable(const struct intel_crtc_state *crtc_state);
 void intel_vrr_set_fixed_rr_timings(const struct intel_crtc_state *crtc_state);
 bool intel_vrr_always_use_vrr_tg(struct intel_display *display);
 
+int intel_vrr_dcb_vmin_vblank_start_next(const struct intel_crtc_state *crtc_state);
+int intel_vrr_dcb_vmax_vblank_start_next(const struct intel_crtc_state *crtc_state);
+int intel_vrr_dcb_vmin_vblank_start_final(const struct intel_crtc_state *crtc_state);
+int intel_vrr_dcb_vmax_vblank_start_final(const struct intel_crtc_state *crtc_state);
+
 #endif /* __INTEL_VRR_H__ */
-- 
2.48.1