[PATCH v7 06/18] drm/i915/vrr: Add DC Balance params to crtc_state

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

Add DC Balance params to crtc_state, also add state checker
params for related properties.

--v3:
- Seggregate crtc_state params with this patch. (Ankit)

--v4:
- Update commit message and header. (Ankit)
- Add +1 to VMIN and VMAX only when it is non-zero. (Ankit)

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c  |  7 ++++++
 .../drm/i915/display/intel_display_types.h    |  7 ++++++
 drivers/gpu/drm/i915/display/intel_vrr.c      | 22 +++++++++++++++++++
 3 files changed, 36 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index de8bf292897c..939366ecea85 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5429,6 +5429,13 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 		PIPE_CONF_CHECK_LLI(cmrr.cmrr_m);
 		PIPE_CONF_CHECK_LLI(cmrr.cmrr_n);
 		PIPE_CONF_CHECK_BOOL(cmrr.enable);
+		PIPE_CONF_CHECK_I(vrr.dc_balance.vmin);
+		PIPE_CONF_CHECK_I(vrr.dc_balance.vmax);
+		PIPE_CONF_CHECK_I(vrr.dc_balance.guardband);
+		PIPE_CONF_CHECK_I(vrr.dc_balance.slope);
+		PIPE_CONF_CHECK_I(vrr.dc_balance.max_increase);
+		PIPE_CONF_CHECK_I(vrr.dc_balance.max_decrease);
+		PIPE_CONF_CHECK_I(vrr.dc_balance.vblank_target);
 	}
 
 	if (!fastset || intel_vrr_always_use_vrr_tg(display)) {
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 30c7315fc25e..e5461900c15b 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1316,6 +1316,13 @@ struct intel_crtc_state {
 		u8 pipeline_full;
 		u16 flipline, vmin, vmax, guardband;
 		u32 vsync_end, vsync_start;
+		struct {
+			bool enable;
+			u16 vmin, vmax;
+			u16 guardband, slope;
+			u16 max_increase, max_decrease;
+			u16 vblank_target;
+		} dc_balance;
 	} vrr;
 
 	/* Content Match Refresh Rate state */
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index d7bc35b07bab..4016da70ece2 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -10,6 +10,7 @@
 #include "intel_display_regs.h"
 #include "intel_display_types.h"
 #include "intel_dp.h"
+#include "intel_dmc_regs.h"
 #include "intel_vrr.h"
 #include "intel_vrr_regs.h"
 
@@ -699,6 +700,8 @@ void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
 {
 	struct intel_display *display = to_intel_display(crtc_state);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	enum pipe pipe = crtc->pipe;
 	u32 trans_vrr_ctl, trans_vrr_vsync;
 	bool vrr_enable;
 
@@ -761,6 +764,25 @@ void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
 	else
 		crtc_state->vrr.enable = vrr_enable;
 
+	if (HAS_VRR_DC_BALANCE(display)) {
+		crtc_state->vrr.dc_balance.vmin =
+			intel_de_read(display, PIPEDMC_DCB_VMIN(pipe)) ?
+			intel_de_read(display, PIPEDMC_DCB_VMIN(pipe)) + 1 : 0;
+		crtc_state->vrr.dc_balance.vmax =
+			intel_de_read(display, PIPEDMC_DCB_VMAX(pipe)) ?
+			intel_de_read(display, PIPEDMC_DCB_VMAX(pipe)) + 1 : 0;
+		crtc_state->vrr.dc_balance.guardband =
+			intel_de_read(display, PIPEDMC_DCB_GUARDBAND(pipe));
+		crtc_state->vrr.dc_balance.max_increase =
+			intel_de_read(display, PIPEDMC_DCB_MAX_INCREASE(pipe));
+		crtc_state->vrr.dc_balance.max_decrease =
+			intel_de_read(display, PIPEDMC_DCB_MAX_DECREASE(pipe));
+		crtc_state->vrr.dc_balance.slope =
+			intel_de_read(display, PIPEDMC_DCB_SLOPE(pipe));
+		crtc_state->vrr.dc_balance.vblank_target =
+			intel_de_read(display, PIPEDMC_DCB_VBLANK(pipe));
+	}
+
 	/*
 	 * #TODO: For Both VRR and CMRR the flag I915_MODE_FLAG_VRR is set for mode_flags.
 	 * Since CMRR is currently disabled, set this flag for VRR for now.
-- 
2.48.1