[PATCH v2 02/13] drm/i915/vrr: Add functions to read out vmin/vmax stuff

[Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

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@linux.intel.com>
Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
---
 drivers/gpu/drm/i915/display/intel_vrr.c      | 57 +++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_vrr.h      |  5 ++
 drivers/gpu/drm/i915/display/intel_vrr_regs.h | 44 ++++++++++++++
 3 files changed, 106 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index adfd231eb578..1c0eaa08927b 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -746,3 +746,60 @@ 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(display, 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(display, 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(display, 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(display, 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__ */
diff --git a/drivers/gpu/drm/i915/display/intel_vrr_regs.h b/drivers/gpu/drm/i915/display/intel_vrr_regs.h
index 6ed0e0dc97e7..2214c10d4084 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_vrr_regs.h
@@ -9,6 +9,50 @@
 #include "intel_display_reg_defs.h"
 
 /* VRR registers */
+#define _TRANS_VRR_DCB_ADJ_FLIPLINE_CFG_A		0x604D4
+#define _TRANS_VRR_DCB_ADJ_FLIPLINE_CFG_B		0x614D4
+#define _TRANS_VRR_DCB_ADJ_FLIPLINE_CFG_C		0x624D4
+#define _TRANS_VRR_DCB_ADJ_FLIPLINE_CFG_D		0x634D4
+#define _TRANS_VRR_DCB_ADJ_FLIPLINE_CFG_E		0x6B4D4
+#define TRANS_VRR_DCB_ADJ_FLIPLINE_CFG(dev_priv, trans)	\
+					_MMIO_TRANS2(dev_priv, \
+						     trans, \
+						     _TRANS_VRR_DCB_ADJ_FLIPLINE_CFG_A)
+
+#define _TRANS_VRR_DCB_ADJ_VMAX_CFG_A			0x604D8
+#define _TRANS_VRR_DCB_ADJ_VMAX_CFG_B			0x614D8
+#define _TRANS_VRR_DCB_ADJ_VMAX_CFG_C			0x624D8
+#define _TRANS_VRR_DCB_ADJ_VMAX_CFG_D			0x634D8
+#define _TRANS_VRR_DCB_ADJ_VMAX_CFG_E			0x6B4D8
+#define TRANS_VRR_DCB_ADJ_VMAX_CFG(dev_priv, trans)	_MMIO_TRANS2(dev_priv, \
+								     trans, \
+								     _TRANS_VRR_DCB_ADJ_VMAX_CFG_A)
+
+#define _TRANS_VRR_FLIPLINE_DCB_A		0x60418
+#define _TRANS_VRR_FLIPLINE_DCB_B		0x61418
+#define _TRANS_VRR_FLIPLINE_DCB_C		0x62418
+#define _TRANS_VRR_FLIPLINE_DCB_D		0x63418
+#define _TRANS_VRR_FLIPLINE_DCB_E		0x6B418
+#define TRANS_VRR_FLIPLINE_DCB(dev_priv, trans) _MMIO_TRANS2(dev_priv, \
+							     trans, \
+							     _TRANS_VRR_FLIPLINE_DCB_A)
+
+#define _TRANS_VRR_VMAX_DCB_A			0x60414
+#define _TRANS_VRR_VMAX_DCB_B			0x61414
+#define _TRANS_VRR_VMAX_DCB_C			0x62414
+#define _TRANS_VRR_VMAX_DCB_D			0x63414
+#define _TRANS_VRR_VMAX_DCB_E			0x6B414
+#define TRANS_VRR_VMAX_DCB(dev_priv, trans)	_MMIO_TRANS2(dev_priv, \
+							     trans, \
+							     _TRANS_VRR_VMAX_DCB_A)
+
+#define VRR_DCB_ADJ_FLIPLINE_CNT_MASK		REG_GENMASK(31, 24)
+#define VRR_DCB_ADJ_FLIPLINE_MASK		REG_GENMASK(19, 0)
+#define VRR_DCB_ADJ_VMAX_CNT_MASK		REG_GENMASK(31, 24)
+#define VRR_DCB_ADJ_VMAX_MASK			REG_GENMASK(19, 0)
+#define VRR_FLIPLINE_DCB_MASK			REG_GENMASK(19, 0)
+#define VRR_VMAX_DCB_MASK			REG_GENMASK(19, 0)
+
 #define _TRANS_VRR_CTL_A			0x60420
 #define _TRANS_VRR_CTL_B			0x61420
 #define _TRANS_VRR_CTL_C			0x62420
-- 
2.48.1