On 22/11/2023 19:15, Alan Previn wrote:
Debugging PXP issues can't even begin without understanding precedding
sequence of important events. Add drm_dbg into the most important PXP
events.
v5 : - rebase.
v4 : - rebase.
v3 : - move gt_dbg to after mutex block in function
i915_gsc_proxy_component_bind. (Vivaik)
v2 : - remove __func__ since drm_dbg covers that (Jani).
- add timeout dbg of the restart from front-end (Alan).
Signed-off-by: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
Reviewed-by: Vivaik Balasubrawmanian <vivaik.balasubrawmanian@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.c | 2 ++
drivers/gpu/drm/i915/pxp/intel_pxp.c | 15 ++++++++++++---
drivers/gpu/drm/i915/pxp/intel_pxp_irq.c | 5 +++--
drivers/gpu/drm/i915/pxp/intel_pxp_session.c | 6 +++++-
drivers/gpu/drm/i915/pxp/intel_pxp_types.h | 1 +
5 files changed, 23 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.c b/drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.c
index 5f138de3c14f..40817ebcca71 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_gsc_proxy.c
@@ -322,6 +322,7 @@ static int i915_gsc_proxy_component_bind(struct device *i915_kdev,
gsc->proxy.component = data;
gsc->proxy.component->mei_dev = mei_kdev;
mutex_unlock(&gsc->proxy.mutex);
+ gt_dbg(gt, "GSC proxy mei component bound\n");
return 0;
}
@@ -342,6 +343,7 @@ static void i915_gsc_proxy_component_unbind(struct device *i915_kdev,
with_intel_runtime_pm(&i915->runtime_pm, wakeref)
intel_uncore_rmw(gt->uncore, HECI_H_CSR(MTL_GSC_HECI2_BASE),
HECI_H_CSR_IE | HECI_H_CSR_RST, 0);
+ gt_dbg(gt, "GSC proxy mei component unbound\n");
}
static const struct component_ops i915_gsc_proxy_component_ops = {
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index dc327cf40b5a..e11f562b1876 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -303,6 +303,8 @@ static int __pxp_global_teardown_final(struct intel_pxp *pxp)
if (!pxp->arb_is_valid)
return 0;
+
+ drm_dbg(&pxp->ctrl_gt->i915->drm, "PXP: teardown for suspend/fini");
/*
* To ensure synchronous and coherent session teardown completion
* in response to suspend or shutdown triggers, don't use a worker.
@@ -324,6 +326,8 @@ static int __pxp_global_teardown_restart(struct intel_pxp *pxp)
if (pxp->arb_is_valid)
return 0;
+
+ drm_dbg(&pxp->ctrl_gt->i915->drm, "PXP: teardown for restart");
/*
* The arb-session is currently inactive and we are doing a reset and restart
* due to a runtime event. Use the worker that was designed for this.
@@ -332,8 +336,11 @@ static int __pxp_global_teardown_restart(struct intel_pxp *pxp)
timeout = intel_pxp_get_backend_timeout_ms(pxp);
- if (!wait_for_completion_timeout(&pxp->termination, msecs_to_jiffies(timeout)))
+ if (!wait_for_completion_timeout(&pxp->termination, msecs_to_jiffies(timeout))) {
+ drm_dbg(&pxp->ctrl_gt->i915->drm, "PXP: restart backend timed out (%d ms)",
+ timeout);
return -ETIMEDOUT;
+ }
return 0;
}
@@ -414,10 +421,12 @@ int intel_pxp_start(struct intel_pxp *pxp)
int ret = 0;
ret = intel_pxp_get_readiness_status(pxp, PXP_READINESS_TIMEOUT);
- if (ret < 0)
+ if (ret < 0) {
+ drm_dbg(&pxp->ctrl_gt->i915->drm, "PXP: tried but not-avail (%d)", ret);
return ret;
- else if (ret > 1)
+ } else if (ret > 1) {
return -EIO; /* per UAPI spec, user may retry later */
+ }
mutex_lock(&pxp->arb_mutex);
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
index 91e9622c07d0..d81750b9bdda 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_irq.c
@@ -40,11 +40,12 @@ void intel_pxp_irq_handler(struct intel_pxp *pxp, u16 iir)
GEN12_DISPLAY_APP_TERMINATED_PER_FW_REQ_INTERRUPT)) {
/* immediately mark PXP as inactive on termination */
intel_pxp_mark_termination_in_progress(pxp);
- pxp->session_events |= PXP_TERMINATION_REQUEST | PXP_INVAL_REQUIRED;
+ pxp->session_events |= PXP_TERMINATION_REQUEST | PXP_INVAL_REQUIRED |
+ PXP_EVENT_TYPE_IRQ;
}
if (iir & GEN12_DISPLAY_STATE_RESET_COMPLETE_INTERRUPT)
- pxp->session_events |= PXP_TERMINATION_COMPLETE;
+ pxp->session_events |= PXP_TERMINATION_COMPLETE | PXP_EVENT_TYPE_IRQ;
This looked to be doing more than adding debug logs, but then no one is
actually consuming this new flag?!
Regards,
Tvrtko
if (pxp->session_events)
queue_work(system_unbound_wq, &pxp->session_work);
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
index 0a3e66b0265e..091c86e03d1a 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_session.c
@@ -137,8 +137,10 @@ void intel_pxp_terminate(struct intel_pxp *pxp, bool post_invalidation_needs_res
static void pxp_terminate_complete(struct intel_pxp *pxp)
{
/* Re-create the arb session after teardown handle complete */
- if (fetch_and_zero(&pxp->hw_state_invalidated))
+ if (fetch_and_zero(&pxp->hw_state_invalidated)) {
+ drm_dbg(&pxp->ctrl_gt->i915->drm, "PXP: creating arb_session after invalidation");
pxp_create_arb_session(pxp);
+ }
complete_all(&pxp->termination);
}
@@ -157,6 +159,8 @@ static void pxp_session_work(struct work_struct *work)
if (!events)
return;
+ drm_dbg(>->i915->drm, "PXP: processing event-flags 0x%08x", events);
+
if (events & PXP_INVAL_REQUIRED)
intel_pxp_invalidate(pxp);
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
index 7e11fa8034b2..07864b584cf4 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
@@ -124,6 +124,7 @@ struct intel_pxp {
#define PXP_TERMINATION_REQUEST BIT(0)
#define PXP_TERMINATION_COMPLETE BIT(1)
#define PXP_INVAL_REQUIRED BIT(2)
+#define PXP_EVENT_TYPE_IRQ BIT(3)
};
#endif /* __INTEL_PXP_TYPES_H__ */
base-commit: 5429d55de723544dfc0630cf39d96392052b27a1
