From f19682202b844fbf2bddb0978d77dafdfff6824a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Thu, 3 Feb 2022 20:38:14 +0200
Subject: drm/i915: Flag crtc scaling_filter changes as modeset
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Git-commit: 1a7a8d93db9b8c7ee9cba983fc6aa8576da237ea
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

The core doesn't flag scaling_filter prop changes as needing
a modeset. That doesn't work for us since we only reprogram the
pipe scaler during full modesets and fastsets. So we need to
flag the prop change as a modeset ourselves. Assuming nothing else
has changed the operation will get promoted (demoted?) to a fastset
later.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220203183823.22890-2-ville.syrjala@linux.intel.com
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/display/intel_display.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 9712e069e3c1..d2ada0d9914c 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7632,6 +7632,10 @@ static int intel_atomic_check(struct drm_device *dev,
 					    new_crtc_state, i) {
 		if (new_crtc_state->inherited != old_crtc_state->inherited)
 			new_crtc_state->uapi.mode_changed = true;
+
+		if (new_crtc_state->uapi.scaling_filter !=
+		    old_crtc_state->uapi.scaling_filter)
+			new_crtc_state->uapi.mode_changed = true;
 	}
 
 	intel_vrr_check_modeset(state);
-- 
2.38.1