[SRU][Q][PATCH 1/2] drm/i915/psr: Disable Panel Replay on Dell XPS 14 DA14260 as a quirk

[AceLan Kao]

From: Jouni Högander <jouni.hogander at intel.com>

BugLink: https://bugs.launchpad.net/bugs/2144712

Add new quirk (QUIRK_DISABLE_PANEL_REPLAY) for disabling Panel Replay as
quirk for problematic setups. Apply this newly added quirk on Dell XPS 14
DA14260 if specific panel model is installed.

We are observing problems with Dell XPS 14 DA14260. This device has certain
LGD panel model which seems to be problematic. We have seen other LGD panel
model with same OUI is working fine. Due to this we can't apply the quirk
only based on panel OUI. There are also cases where same device model has
differing panel model. We don't want to disable Panel Replay on such
devices. Best we can do is to apply the quirk based on both device model
and panel model.

Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/7521
Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
Reviewed-by: Mika Kahola <mika.kahola at intel.com>
Link: https://patch.msgid.link/20260317062402.1888624-1-jouni.hogander@intel.com
(cherry picked from commit 45c77d4bf8d4d15453d709b9b828e498898e0751 linux-next)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c    |  7 +++++++
 drivers/gpu/drm/i915/display/intel_quirks.c | 17 ++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_quirks.h |  1 +
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index debb0e8f321d8..f254b0af02588 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -47,6 +47,7 @@
 #include "intel_hdmi.h"
 #include "intel_psr.h"
 #include "intel_psr_regs.h"
+#include "intel_quirks.h"
 #include "intel_snps_phy.h"
 #include "intel_step.h"
 #include "intel_vblank.h"
@@ -646,6 +647,12 @@ static void _panel_replay_init_dpcd(struct intel_dp *intel_dp)
 	if (intel_dp->mst_detect == DRM_DP_MST)
 		return;
 
+	if (intel_has_dpcd_quirk(intel_dp, QUIRK_DISABLE_PANEL_REPLAY)) {
+		drm_dbg_kms(display->drm,
+			    "Panel Replay support not currently available for this setup\n");
+		return;
+	}
+
 	ret = drm_dp_dpcd_read_data(&intel_dp->aux, DP_PANEL_REPLAY_CAP_SUPPORT,
 				    &intel_dp->pr_dpcd, sizeof(intel_dp->pr_dpcd));
 	if (ret < 0)
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c
index d2e16b79d6be1..722b559a84041 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.c
+++ b/drivers/gpu/drm/i915/display/intel_quirks.c
@@ -86,6 +86,14 @@ static void quirk_edp_limit_rate_hbr2(struct intel_display *display)
 	drm_info(display->drm, "Applying eDP Limit rate to HBR2 quirk\n");
 }
 
+static void quirk_disable_panel_replay(struct intel_dp *intel_dp)
+{
+	struct intel_display *display = to_intel_display(intel_dp);
+
+	intel_set_dpcd_quirk(intel_dp, QUIRK_DISABLE_PANEL_REPLAY);
+	drm_info(display->drm, "Applying disable Panel Replay quirk\n");
+}
+
 struct intel_quirk {
 	int device;
 	int subsystem_vendor;
@@ -251,7 +259,14 @@ static const struct intel_dpcd_quirk intel_dpcd_quirks[] = {
 		.sink_oui = SINK_OUI(0x38, 0xec, 0x11),
 		.hook = quirk_fw_sync_len,
 	},
-
+	/* Dell XPS 14 DA14260 */
+	{
+		.device = 0xb080,
+		.subsystem_vendor = 0x1028,
+		.subsystem_device = 0x0db9,
+		.sink_oui = SINK_OUI(0x00, 0x22, 0xb9),
+		.hook = quirk_disable_panel_replay,
+	},
 };
 
 void intel_init_quirks(struct intel_display *display)
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.h b/drivers/gpu/drm/i915/display/intel_quirks.h
index 06da0e286c67c..77e490caed0d8 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.h
+++ b/drivers/gpu/drm/i915/display/intel_quirks.h
@@ -21,6 +21,7 @@ enum intel_quirk_id {
 	QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK,
 	QUIRK_FW_SYNC_LEN,
 	QUIRK_EDP_LIMIT_RATE_HBR2,
+	QUIRK_DISABLE_PANEL_REPLAY,
 };
 
 void intel_init_quirks(struct intel_display *display);
-- 
2.53.0