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@xxxxxx>
---
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
index 5a18f0ead4d5..09d09734117e 100644
--- 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(int irq, void *arg)
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]);
--
2.14.1
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