linux-kernel - [PATCH 1/2] Add quirk to disable PSR 2 on a per device basis

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Message-Id: <20230222141755.1060162-2-wse@tuxedocomputers.com>
Date:   Wed, 22 Feb 2023 15:17:54 +0100
From:   Werner Sembach <wse@...edocomputers.com>
To:     jani.nikula@...ux.intel.com, joonas.lahtinen@...ux.intel.com,
        rodrigo.vivi@...el.com, tvrtko.ursulin@...ux.intel.com,
        airlied@...il.com, daniel@...ll.ch, jose.souza@...el.com,
        jouni.hogander@...el.com, mika.kahola@...el.com,
        ville.syrjala@...ux.intel.com, lucas.demarchi@...el.com,
        Diego.SantaCruz@...netix.com, wse@...edocomputers.com,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] Add quirk to disable PSR 2 on a per device basis

This adds the possibility to disable PSR 2 explicitly using the intel
quirk table for devices where PSR 2 is borked, but PSR 1 works fine.

Signed-off-by: Werner Sembach <wse@...edocomputers.com>
Cc: <stable@...r.kernel.org>
---
 drivers/gpu/drm/i915/display/intel_psr.c    | 4 +++-
 drivers/gpu/drm/i915/display/intel_quirks.c | 6 ++++++
 drivers/gpu/drm/i915/display/intel_quirks.h | 1 +
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 5b678916e6db5..4607f3c4cf592 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -37,6 +37,7 @@
 #include "intel_psr.h"
 #include "intel_snps_phy.h"
 #include "skl_universal_plane.h"
+#include "intel_quirks.h"
 
 /**
  * DOC: Panel Self Refresh (PSR/SRD)
@@ -851,7 +852,8 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
 	int crtc_vdisplay = crtc_state->hw.adjusted_mode.crtc_vdisplay;
 	int psr_max_h = 0, psr_max_v = 0, max_bpp = 0;
 
-	if (!intel_dp->psr.sink_psr2_support)
+	if (!intel_dp->psr.sink_psr2_support ||
+	    intel_has_quirk(dev_priv, QUIRK_NO_PSR2))
 		return false;
 
 	/* JSL and EHL only supports eDP 1.3 */
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c
index 6e48d3bcdfec5..ce6d0fe6448f5 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.c
+++ b/drivers/gpu/drm/i915/display/intel_quirks.c
@@ -65,6 +65,12 @@ static void quirk_no_pps_backlight_power_hook(struct drm_i915_private *i915)
 	drm_info(&i915->drm, "Applying no pps backlight power quirk\n");
 }
 
+static void quirk_no_psr2(struct drm_i915_private *i915)
+{
+	intel_set_quirk(i915, QUIRK_NO_PSR2);
+	drm_info(&i915->drm, "Applying No PSR 2 quirk\n");
+}
+
 struct intel_quirk {
 	int device;
 	int subsystem_vendor;
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.h b/drivers/gpu/drm/i915/display/intel_quirks.h
index 10a4d163149fd..2e0b788a44a1e 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.h
+++ b/drivers/gpu/drm/i915/display/intel_quirks.h
@@ -17,6 +17,7 @@ enum intel_quirk_id {
 	QUIRK_INVERT_BRIGHTNESS,
 	QUIRK_LVDS_SSC_DISABLE,
 	QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK,
+	QUIRK_NO_PSR2,
 };
 
 void intel_init_quirks(struct drm_i915_private *i915);
-- 
2.34.1