drm/i915/psr: Deactivate PSR only on LNL and when selective fetch enabled

Using intel_psr_exit in frontbuffer flush on older platforms seems to be
causing problems.

Sending single full frame update using intel_psr_force_update is anyways
more optimal compared to psr deactivate/activate -> move back to this
approach on PSR1, PSR HW tracking and Panel Replay full frame update and
use deactivate/activate only on LunarLake and only when selective fetch is
enabled.

Tested-by: Lemen <lemen@lemen.xyz>
Tested-by: Koos Vriezen <koos.vriezen@gmail.com>
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14946
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://lore.kernel.org/r/20250922102725.2752742-1-jouni.hogander@intel.com
Cherry-picked-for: https://gitlab.archlinux.org/archlinux/packaging/packages/linux/-/issues/157

Author: hogander

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

@@ -3365,6 +3365,7 @@ static void _psr_flush_handle(struct intel_dp *intel_dp)
 	struct intel_display *display = to_intel_display(intel_dp);
 
 	if (DISPLAY_VER(display) < 20 && intel_dp->psr.psr2_sel_fetch_enabled) {
+		/* Selective fetch prior LNL */
 		if (intel_dp->psr.psr2_sel_fetch_cff_enabled) {
 			/* can we turn CFF off? */
 			if (intel_dp->psr.busy_frontbuffer_bits == 0)
@@ -3383,12 +3384,19 @@ static void _psr_flush_handle(struct intel_dp *intel_dp)
 		intel_psr_configure_full_frame_update(intel_dp);
 
 		intel_psr_force_update(intel_dp);
+	} else if (!intel_dp->psr.psr2_sel_fetch_enabled) {
+		/*
+		 * PSR1 on all platforms
+		 * PSR2 HW tracking
+		 * Panel Replay Full frame update
+		 */
+		intel_psr_force_update(intel_dp);
 	} else {
+		/* Selective update LNL onwards */
 		intel_psr_exit(intel_dp);
 	}
 
-	if ((!intel_dp->psr.psr2_sel_fetch_enabled || DISPLAY_VER(display) >= 20) &&
-	    !intel_dp->psr.busy_frontbuffer_bits)
+	if (!intel_dp->psr.active && !intel_dp->psr.busy_frontbuffer_bits)
 		queue_work(display->wq.unordered, &intel_dp->psr.work);
 }