drm/i915/psr: Split setting sff and cff bits away from intel_psr_force_update

This is a clean-up and a preparation for adding own SFF and CFF registers
for LunarLake onwards.

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250213064804.2077127-4-jouni.hogander@intel.com

Author: hogander

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

@@ -2327,15 +2327,6 @@ static u32 man_trk_ctl_continuos_full_frame(struct intel_display *display)
 static void intel_psr_force_update(struct intel_dp *intel_dp)
 {
 	struct intel_display *display = to_intel_display(intel_dp);
-	enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
-
-	if (intel_dp->psr.psr2_sel_fetch_enabled)
-		intel_de_write(display,
-			       PSR2_MAN_TRK_CTL(display, cpu_transcoder),
-			       man_trk_ctl_enable_bit_get(display) |
-			       man_trk_ctl_partial_frame_bit_get(display) |
-			       man_trk_ctl_single_full_frame_bit_get(display) |
-			       man_trk_ctl_continuos_full_frame(display));
 
 	/*
 	 * Display WA #0884: skl+
@@ -3131,31 +3122,31 @@ static void intel_psr_work(struct work_struct *work)
 	mutex_unlock(&intel_dp->psr.lock);
 }
 
-static void _psr_invalidate_handle(struct intel_dp *intel_dp)
+static void intel_psr_configure_full_frame_update(struct intel_dp *intel_dp)
 {
 	struct intel_display *display = to_intel_display(intel_dp);
 	enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
 
-	if (intel_dp->psr.psr2_sel_fetch_enabled) {
-		u32 val;
+	if (!intel_dp->psr.psr2_sel_fetch_enabled)
+		return;
 
-		if (intel_dp->psr.psr2_sel_fetch_cff_enabled) {
-			/* Send one update otherwise lag is observed in screen */
-			intel_de_write(display,
-				       CURSURFLIVE(display, intel_dp->psr.pipe),
-				       0);
-			return;
+	intel_de_write(display,
+		       PSR2_MAN_TRK_CTL(display, cpu_transcoder),
+		       man_trk_ctl_enable_bit_get(display) |
+		       man_trk_ctl_partial_frame_bit_get(display) |
+		       man_trk_ctl_single_full_frame_bit_get(display) |
+		       man_trk_ctl_continuos_full_frame(display));
+}
+
+static void _psr_invalidate_handle(struct intel_dp *intel_dp)
+{
+	if (intel_dp->psr.psr2_sel_fetch_enabled) {
+		if (!intel_dp->psr.psr2_sel_fetch_cff_enabled) {
+			intel_dp->psr.psr2_sel_fetch_cff_enabled = true;
+			intel_psr_configure_full_frame_update(intel_dp);
 		}
 
-		val = man_trk_ctl_enable_bit_get(display) |
-		      man_trk_ctl_partial_frame_bit_get(display) |
-		      man_trk_ctl_continuos_full_frame(display);
-		intel_de_write(display,
-			       PSR2_MAN_TRK_CTL(display, cpu_transcoder),
-			       val);
-		intel_de_write(display,
-			       CURSURFLIVE(display, intel_dp->psr.pipe), 0);
-		intel_dp->psr.psr2_sel_fetch_cff_enabled = true;
+		intel_psr_force_update(intel_dp);
 	} else {
 		intel_psr_exit(intel_dp);
 	}
@@ -3236,44 +3227,27 @@ static void _psr_flush_handle(struct intel_dp *intel_dp)
 {
 	struct intel_display *display = to_intel_display(intel_dp);
 	struct drm_i915_private *dev_priv = to_i915(display->drm);
-	enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
 
 	if (intel_dp->psr.psr2_sel_fetch_enabled) {
 		if (intel_dp->psr.psr2_sel_fetch_cff_enabled) {
 			/* can we turn CFF off? */
-			if (intel_dp->psr.busy_frontbuffer_bits == 0) {
-				u32 val = man_trk_ctl_enable_bit_get(display) |
-					man_trk_ctl_partial_frame_bit_get(display) |
-					man_trk_ctl_single_full_frame_bit_get(display) |
-					man_trk_ctl_continuos_full_frame(display);
-
-				/*
-				 * Set psr2_sel_fetch_cff_enabled as false to allow selective
-				 * updates. Still keep cff bit enabled as we don't have proper
-				 * SU configuration in case update is sent for any reason after
-				 * sff bit gets cleared by the HW on next vblank.
-				 */
-				intel_de_write(display,
-					       PSR2_MAN_TRK_CTL(display, cpu_transcoder),
-					       val);
-				intel_de_write(display,
-					       CURSURFLIVE(display, intel_dp->psr.pipe),
-					       0);
+			if (intel_dp->psr.busy_frontbuffer_bits == 0)
 				intel_dp->psr.psr2_sel_fetch_cff_enabled = false;
-			}
-		} else {
-			/*
-			 * continuous full frame is disabled, only a single full
-			 * frame is required
-			 */
-			intel_psr_force_update(intel_dp);
 		}
-	} else {
-		intel_psr_force_update(intel_dp);
 
-		if (!intel_dp->psr.active && !intel_dp->psr.busy_frontbuffer_bits)
-			queue_work(dev_priv->unordered_wq, &intel_dp->psr.work);
+		/*
+		 * Still keep cff bit enabled as we don't have proper SU
+		 * configuration in case update is sent for any reason after
+		 * sff bit gets cleared by the HW on next vblank.
+		 */
+		intel_psr_configure_full_frame_update(intel_dp);
 	}
+
+	intel_psr_force_update(intel_dp);
+
+	if (!intel_dp->psr.psr2_sel_fetch_enabled && !intel_dp->psr.active &&
+	    !intel_dp->psr.busy_frontbuffer_bits)
+		queue_work(dev_priv->unordered_wq, &intel_dp->psr.work);
 }
 
 /**