From: Imre Deak Date: Wed, 25 Feb 2026 16:46:07 +0000 (+0200) Subject: drm/i915/dp: Fix the device service IRQ DPCD_REV check X-Git-Tag: v7.1-rc1~167^2~24^2~65 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e0f252bb36dea780971af4736622d2c7be60d122;p=thirdparty%2Flinux.git 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: Luca Coelho Signed-off-by: Imre Deak Link: https://patch.msgid.link/20260225164618.1261368-10-imre.deak@intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 4ecf5f6699f66..f04f15e158490 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -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;