drm/i915/dsb: Plumb the whole atomic state into intel_dsb_prepare()

The DSB code will need to examine both the old and new crtc
states. Pass in the whole atomic state so we can dig up
what we need.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611133344.30673-7-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -1919,7 +1919,7 @@ void intel_color_prepare_commit(struct intel_atomic_state *state,
 	if (!crtc_state->pre_csc_lut && !crtc_state->post_csc_lut)
 		return;
 
-	crtc_state->dsb = intel_dsb_prepare(crtc_state, INTEL_DSB_0, 1024);
+	crtc_state->dsb = intel_dsb_prepare(state, crtc, INTEL_DSB_0, 1024);
 	if (!crtc_state->dsb)
 		return;
 

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

@@ -434,7 +434,8 @@ void intel_dsb_wait(struct intel_dsb *dsb)
 
 /**
  * intel_dsb_prepare() - Allocate, pin and map the DSB command buffer.
- * @crtc_state: the CRTC state
+ * @state: the atomic state
+ * @crtc: the CRTC
  * @dsb_id: the DSB engine to use
  * @max_cmds: number of commands we need to fit into command buffer
  *
@@ -444,12 +445,14 @@ void intel_dsb_wait(struct intel_dsb *dsb)
  * Returns:
  * DSB context, NULL on failure
  */
-struct intel_dsb *intel_dsb_prepare(const struct intel_crtc_state *crtc_state,
+struct intel_dsb *intel_dsb_prepare(struct intel_atomic_state *state,
+				    struct intel_crtc *crtc,
 				    enum intel_dsb_id dsb_id,
 				    unsigned int max_cmds)
 {
-	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	struct drm_i915_private *i915 = to_i915(state->base.dev);
+	const struct intel_crtc_state *crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
 	intel_wakeref_t wakeref;
 	struct intel_dsb *dsb;
 	unsigned int size;

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

@@ -10,6 +10,7 @@
 
 #include "i915_reg_defs.h"
 
+struct intel_atomic_state;
 struct intel_crtc;
 struct intel_crtc_state;
 struct intel_dsb;
@@ -22,7 +23,8 @@ enum intel_dsb_id {
 	I915_MAX_DSBS,
 };
 
-struct intel_dsb *intel_dsb_prepare(const struct intel_crtc_state *crtc_state,
+struct intel_dsb *intel_dsb_prepare(struct intel_atomic_state *state,
+				    struct intel_crtc *crtc,
 				    enum intel_dsb_id dsb_id,
 				    unsigned int max_cmds);
 void intel_dsb_finish(struct intel_dsb *dsb);