[PATCH] drm/i915/psr: Disable PSR2 on Xiaomi Book Pro 14 2026 as a quirk

["Jouni Högander" <jouni.hogander@intel.com>]

Add new quirk (QUIRK_DISABLE_PSR2) for disabling PSR2 as a quirk for
problematic setups. Apply this newly added quirk on Xiaomi Book Pro 14 2026.

Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/work_items/7677
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c    | 6 ++++++
 drivers/gpu/drm/i915/display/intel_quirks.c | 9 +++++++++
 drivers/gpu/drm/i915/display/intel_quirks.h | 1 +
 3 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index b4ca5843d098..19b3b9d52eb9 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -695,6 +695,12 @@ static void _psr_init_dpcd(struct intel_dp *intel_dp, struct intel_connector *co
 
 	connector->dp.psr_caps.sync_latency = intel_dp_get_sink_sync_latency(intel_dp);
 
+	if (intel_has_quirk(display, QUIRK_DISABLE_PSR2)) {
+		drm_dbg_kms(display->drm,
+			    "PSR2 support not currently available for this setup\n");
+		return;
+	}
+
 	if (DISPLAY_VER(display) >= 9 &&
 	    connector->dp.psr_caps.dpcd[0] >= DP_PSR2_WITH_Y_COORD_IS_SUPPORTED) {
 		bool y_req = connector->dp.psr_caps.dpcd[1] &
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c
index 883f297d4b83..229e0025a06c 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.c
+++ b/drivers/gpu/drm/i915/display/intel_quirks.c
@@ -94,6 +94,12 @@ static void quirk_disable_edp_panel_replay(struct intel_dp *intel_dp)
 	drm_info(display->drm, "Applying disable Panel Replay quirk\n");
 }
 
+static void quirk_disable_psr2(struct intel_display *display)
+{
+	intel_set_quirk(display, QUIRK_DISABLE_PSR2);
+	drm_info(display->drm, "Applying disable PSR2 quirk\n");
+}
+
 struct intel_quirk {
 	int device;
 	int subsystem_vendor;
@@ -250,6 +256,9 @@ static struct intel_quirk intel_quirks[] = {
 
 	/* Dell XPS 13 7390 2-in-1 */
 	{ 0x8a52, 0x1028, 0x08b0, quirk_edp_limit_rate_hbr2 },
+
+	/* Xiaomi Book Pro 14 2026 */
+	{ 0xb081, 0x1d72, 0x2424, quirk_disable_psr2 },
 };
 
 static const struct intel_dpcd_quirk intel_dpcd_quirks[] = {
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.h b/drivers/gpu/drm/i915/display/intel_quirks.h
index 83214eb94b0c..970a4fe52faf 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.h
+++ b/drivers/gpu/drm/i915/display/intel_quirks.h
@@ -22,6 +22,7 @@ enum intel_quirk_id {
 	QUIRK_FW_SYNC_LEN,
 	QUIRK_EDP_LIMIT_RATE_HBR2,
 	QUIRK_DISABLE_EDP_PANEL_REPLAY,
+	QUIRK_DISABLE_PSR2,
 };
 
 void intel_init_quirks(struct intel_display *display);
-- 
2.43.0