drm/i915/drrs: Refactor CPU transcoder DRRS check

Rename cpu_transcoder_has_drrs() to intel_cpu_transcoder_has_drrs() and
move it to intel_drrs.[ch].

V2:
 - Move helpers to intel_drrs.[ch] (Jani)
 - Fix commit message (Jani)

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Cc: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240228055502.2857819-1-bhanuprakash.modem@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_dp.c

@@ -67,6 +67,7 @@
 #include "intel_dp_tunnel.h"
 #include "intel_dpio_phy.h"
 #include "intel_dpll.h"
+#include "intel_drrs.h"
 #include "intel_fifo_underrun.h"
 #include "intel_hdcp.h"
 #include "intel_hdmi.h"
@@ -2683,15 +2684,6 @@ intel_dp_compute_hdr_metadata_infoframe_sdp(struct intel_dp *intel_dp,
 		intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GAMUT_METADATA);
 }
 
-static bool cpu_transcoder_has_drrs(struct drm_i915_private *i915,
-				    enum transcoder cpu_transcoder)
-{
-	if (HAS_DOUBLE_BUFFERED_M_N(i915))
-		return true;
-
-	return intel_cpu_transcoder_has_m2_n2(i915, cpu_transcoder);
-}
-
 static bool can_enable_drrs(struct intel_connector *connector,
 			    const struct intel_crtc_state *pipe_config,
 			    const struct drm_display_mode *downclock_mode)
@@ -2714,7 +2706,7 @@ static bool can_enable_drrs(struct intel_connector *connector,
 	if (pipe_config->has_pch_encoder)
 		return false;
 
-	if (!cpu_transcoder_has_drrs(i915, pipe_config->cpu_transcoder))
+	if (!intel_cpu_transcoder_has_drrs(i915, pipe_config->cpu_transcoder))
 		return false;
 
 	return downclock_mode &&

drivers/gpu/drm/i915/display/intel_drrs.c

@@ -63,6 +63,15 @@ const char *intel_drrs_type_str(enum drrs_type drrs_type)
 	return str[drrs_type];
 }
 
+bool intel_cpu_transcoder_has_drrs(struct drm_i915_private *i915,
+				   enum transcoder cpu_transcoder)
+{
+	if (HAS_DOUBLE_BUFFERED_M_N(i915))
+		return true;
+
+	return intel_cpu_transcoder_has_m2_n2(i915, cpu_transcoder);
+}
+
 static void
 intel_drrs_set_refresh_rate_pipeconf(struct intel_crtc *crtc,
 				     enum drrs_refresh_rate refresh_rate)

drivers/gpu/drm/i915/display/intel_drrs.h

@@ -9,12 +9,15 @@
 #include <linux/types.h>
 
 enum drrs_type;
+enum transcoder;
 struct drm_i915_private;
 struct intel_atomic_state;
 struct intel_crtc;
 struct intel_crtc_state;
 struct intel_connector;
 
+bool intel_cpu_transcoder_has_drrs(struct drm_i915_private *i915,
+				   enum transcoder cpu_transcoder);
 const char *intel_drrs_type_str(enum drrs_type drrs_type);
 bool intel_drrs_is_active(struct intel_crtc *crtc);
 void intel_drrs_activate(const struct intel_crtc_state *crtc_state);