Seems odd that we clear all event status indicators if we've only handled some. Only clear the ones we've handled.
v2: ack DOWN_REP and UP_REQ only if they were set in esi (Ville) Signed-off-by: Jani Nikula <[email protected]> --- drivers/gpu/drm/i915/display/intel_dp.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 0960e6e3be77..cb726cee9e1d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3625,13 +3625,17 @@ static void intel_dp_handle_test_request(struct intel_dp *intel_dp) } static void -intel_dp_mst_hpd_irq(struct intel_dp *intel_dp, u8 *esi, bool *handled) +intel_dp_mst_hpd_irq(struct intel_dp *intel_dp, u8 *esi, u8 *ack) { - drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, handled); + bool handled = false; + + drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled); + if (handled) + ack[1] |= esi[1] & (DP_DOWN_REP_MSG_RDY | DP_UP_REQ_MSG_RDY); if (esi[1] & DP_CP_IRQ) { intel_hdcp_handle_cp_irq(intel_dp->attached_connector); - *handled = true; + ack[1] |= DP_CP_IRQ; } } @@ -3683,7 +3687,7 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp) for (;;) { u8 esi[4] = {}; - bool handled; + u8 ack[4] = {}; if (!intel_dp_get_sink_irq_esi(intel_dp, esi)) { drm_dbg_kms(&i915->drm, @@ -3699,15 +3703,15 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp) esi[3] & LINK_STATUS_CHANGED) { if (!intel_dp_mst_link_status(intel_dp)) link_ok = false; - handled = true; + ack[3] |= LINK_STATUS_CHANGED; } - intel_dp_mst_hpd_irq(intel_dp, esi, &handled); + intel_dp_mst_hpd_irq(intel_dp, esi, ack); - if (!handled) + if (!memchr_inv(ack, 0, sizeof(ack))) break; - if (!intel_dp_ack_sink_irq_esi(intel_dp, esi)) + if (!intel_dp_ack_sink_irq_esi(intel_dp, ack)) drm_dbg_kms(&i915->drm, "Failed to ack ESI\n"); } -- 2.30.2
