[Intel-gfx] [PATCH v2] drm/i915/mst: only ack the ESI we actually handled
Jani Nikula
jani.nikula at intel.com
Thu Jan 20 11:01:02 UTC 2022
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 <jani.nikula at intel.com>
---
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
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