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[J/OEM-5.14,10/11] drm/i915/display/adlp: Allow PSR2 to be enabled

Message ID 20220613070009.228567-14-kai.heng.feng@canonical.com
State New
Headers show
Series Fix screen flickering caused by PSR on Intel TGL platform | expand

Commit Message

Kai-Heng Feng June 13, 2022, 7 a.m. UTC 
From: José Roberto de Souza <jose.souza@intel.com>

BugLink: https://bugs.launchpad.net/bugs/1978252

With all the recent fixes PSR2 is properly working in Alderlake-P but
due to some issues that don't have software workarounds it will not be
supported in display steppings older than B0.

Even with this patch PSR2 will no be enabled by default in ADL-P, it
still requires enable_psr2_sel_fetch to be set to true, what some
of our tests does.

Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210930001409.254817-7-jose.souza@intel.com
(cherry picked from commit de572e881b9d7f19da74981dd320699ea796e5a3)
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 255142ebe213d..21503e65531a6 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -828,12 +828,8 @@  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");
+	if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0)) {
+		drm_dbg_kms(&dev_priv->drm, "PSR2 not completely functional in this stepping\n");
 		return false;
 	}