Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:
> Knowing the neighbouring seqno (current on hw, last submitted to hw)
> provide some useful breadcrumbs to the debug log.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_breadcrumbs.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_breadcrumbs.c b/drivers/gpu/drm/i915/intel_breadcrumbs.c
> index 9ccbf26124c6..35da5928bd8a 100644
> --- a/drivers/gpu/drm/i915/intel_breadcrumbs.c
> +++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c
> @@ -64,10 +64,12 @@ static unsigned long wait_timeout(void)
>
> static noinline void missed_breadcrumb(struct intel_engine_cs *engine)
> {
> - DRM_DEBUG_DRIVER("%s missed breadcrumb at %pF, irq posted? %s\n",
> + DRM_DEBUG_DRIVER("%s missed breadcrumb at %pF, irq posted? %s, current seqno=%x, last=%x\n",
> engine->name, __builtin_return_address(0),
> yesno(test_bit(ENGINE_IRQ_BREADCRUMB,
> - &engine->irq_posted)));
> + &engine->irq_posted)),
> + intel_engine_get_seqno(engine),
> + intel_engine_last_submit(engine));
>
> set_bit(engine->id, &engine->i915->gpu_error.missed_irq_rings);
> }
> --
> 2.11.0
>
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