From: Peter Ujfalusi <peter.ujfalusi@ti.com>
Date: Fri, 29 Sep 2017 14:49:48 +0300
Subject: drm/omap: DMM: Print information if we received an error interrupt
Git-commit: b8c456d31b64e46b68b6de4e209bd906f10aa314
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
To help diagnose DMM errors, print out information if any of the error bits
are set in the interrupt status register.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
+++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
@@ -166,6 +166,11 @@ static irqreturn_t omap_dmm_irq_handler(
dmm_write(dmm, status, DMM_PAT_IRQSTATUS);
for (i = 0; i < dmm->num_engines; i++) {
+ if (status & DMM_IRQSTAT_ERR_MASK)
+ dev_err(dmm->dev,
+ "irq error(engine%d): IRQSTAT 0x%02x\n",
+ i, status & 0xff);
+
if (status & DMM_IRQSTAT_LST) {
if (dmm->engines[i].async)
release_engine(&dmm->engines[i]);