[SRU][Q][PATCH 1/2] drm/i915/psr: Check pause counter before continuing to PSR activation

[AceLan Kao]

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

BugLink: https://bugs.launchpad.net/bugs/2130998

Currently intel_psr_work is re-activating PSR even when pause_counter > 0
which is incorrect. Fix this by checking pause_counter before re-activating
PSR.

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/14822
Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
Reviewed-by: Mika Kahola <mika.kahola at intel.com>
Link: https://lore.kernel.org/r/20250815084534.1637030-4-jouni.hogander@intel.com
(cherry picked from commit 7c8c76272e1732c63aab760b0b656f00bdc67050)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 85e9aad7ec507..9142a8bbcc058 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -3232,6 +3232,9 @@ static void intel_psr_work(struct work_struct *work)
 	if (READ_ONCE(intel_dp->psr.irq_aux_error))
 		intel_psr_handle_irq(intel_dp);
 
+	if (intel_dp->psr.pause_counter)
+		goto unlock;
+
 	/*
 	 * We have to make sure PSR is ready for re-enable
 	 * otherwise it keeps disabled until next full enable/disable cycle.
-- 
2.43.0