Doing a hw-irq -> threaded-irq round-trip is counter-productive, stay in the threaded irq handler as long as we can.
Signed-off-by: Boris Brezillon boris.brezillon@collabora.com --- drivers/gpu/drm/panfrost/panfrost_mmu.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index 21e552d1ac71..65bc20628c4e 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -580,6 +580,8 @@ static irqreturn_t panfrost_mmu_irq_handler_thread(int irq, void *data) u32 status = mmu_read(pfdev, MMU_INT_RAWSTAT); int i, ret;
+again: + for (i = 0; status; i++) { u32 mask = BIT(i) | BIT(i + 16); u64 addr; @@ -628,6 +630,11 @@ static irqreturn_t panfrost_mmu_irq_handler_thread(int irq, void *data) status &= ~mask; }
+ /* If we received new MMU interrupts, process them before returning. */ + status = mmu_read(pfdev, MMU_INT_RAWSTAT); + if (status) + goto again; + mmu_write(pfdev, MMU_INT_MASK, ~0); return IRQ_HANDLED; };