drm/i915/fbc: disable FBC if PSR2 selective fetch is enabled

It is not recommended to have both FBC dirty rect and PSR2
selective fetch be enabled at the same time. Mark FBC as not
possible, if PSR2 selective fetch is enabled.

v2: fix the condition to disable FBC if PSR2 enabled (Jani)

v3: use HAS_FBC_DIRTY_RECT()

v4: Update to patch description

Bspec: 68881
Reviewed-by: Ville Syrjälä <[e-mail]>
Signed-off-by: Vinod Govindapillai <[e-mail]>
Signed-off-by: Mika Kahola <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

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

···
 	 * Display 12+ is not supporting FBC with PSR2.
 	 * Recommendation is to keep this combination disabled
 	 * Bspec: 50422 HSD: 14010260002
+	 *
+	 * In Xe3, PSR2 selective fetch and FBC dirty rect feature cannot
+	 * coexist. So if PSR2 selective fetch is supported then mark that
+	 * FBC is not supported.
+	 * TODO: Need a logic to decide between PSR2 and FBC Dirty rect
 	 */
-	if (IS_DISPLAY_VER(display, 12, 14) && crtc_state->has_sel_update &&
-	    !crtc_state->has_panel_replay) {
+	if ((IS_DISPLAY_VER(display, 12, 14) || HAS_FBC_DIRTY_RECT(display)) &&
+	    crtc_state->has_sel_update && !crtc_state->has_panel_replay) {
 		plane_state->no_fbc_reason = "PSR2 enabled";
 		return 0;
 	}