drm/i915/display/adl_p: Disable PSR2

We are missing the implementation of some workarounds to enabled PSR2
in Alderlake P, so to avoid any CI report of issues around PSR2
disabling it until all PSR2 workarounds are implemented.

Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Clint Taylor <Clinton.A.Taylor@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210524214805.259692-5-jose.souza@intel.com

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

@@ -765,6 +765,15 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
 		return false;
 	}
 
+	/*
+	 * We are missing the implementation of some workarounds to enabled PSR2
+	 * in Alderlake_P, until ready PSR2 should be kept disabled.
+	 */
+	if (IS_ALDERLAKE_P(dev_priv)) {
+		drm_dbg_kms(&dev_priv->drm, "PSR2 is missing the implementation of workarounds\n");
+		return false;
+	}
+
 	if (!transcoder_has_psr2(dev_priv, crtc_state->cpu_transcoder)) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "PSR2 not supported in transcoder %s\n",