Commit e0f252bb authored by Imre Deak's avatar Imre Deak
Browse files

drm/i915/dp: Fix the device service IRQ DPCD_REV check 



The DP_DEVICE_SERVICE_IRQ_VECTOR DPCD register is supported since DPCD
REV 1.0, so read it out always. Flags added only by later DPCD revisions
are defined as reserved/must-be-zero by earlier DP Standard versions.

Reviewed-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: default avatarImre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260225164618.1261368-10-imre.deak@intel.com
parent 21bd6328

drivers/gpu/drm/i915/display/intel_dp.c

+0 −3
Original line number Diff line number Diff line
@@ -5790,9 +5790,6 @@ static void intel_dp_check_device_service_irq(struct intel_dp *intel_dp) 
	struct intel_display *display = to_intel_display(intel_dp);

	u8 val;



	if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)

		return;



	if (drm_dp_dpcd_readb(&intel_dp->aux,

			      DP_DEVICE_SERVICE_IRQ_VECTOR, &val) != 1 || !val)

		return;