Errors will be reported in /sys/kernel/debug/tracing/trace,
still not noisy enough, but better than silently ignoring them.
E.g:
<idle>-0 [000] d.h1 183.851864: malidp_de_irq: error occurred DE_STATUS
is 0x00000001
surfaceflinger-803 [000] d.h1 197.993003: malidp_de_irq: error occurred
DE_STATUS is 0x00000001
surfaceflinger-803 [000] d.h1 213.595119: malidp_de_irq: error occurred
DE_STATUS is 0x00000001
surfaceflinger-803 [000] d.h. 217.754371: malidp_de_irq: error occurred
DE_STATUS is 0x00000001
surfaceflinger-803 [000] d.h. 217.820848: malidp_de_irq: error occurred
DE_STATUS is 0x00000001
surfaceflinger-803 [000] d.h. 217.854034: malidp_de_irq: error occurred
DE_STATUS is 0x00000001
Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheor...@arm.com>
---
drivers/gpu/drm/arm/malidp_hw.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index 2bfb542..8e7d49f 100644
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -797,6 +797,9 @@ static irqreturn_t malidp_de_irq(int irq, void *arg)
if (status & de->vsync_irq)
drm_crtc_handle_vblank(&malidp->crtc);
+ if (status & ~de->vsync_irq & de->irq_mask)
+ trace_printk("error occurred DE_STATUS is 0x%08X\n", status);
+
malidp_hw_clear_irq(hwdev, MALIDP_DE_BLOCK, status);
return (ret == IRQ_NONE) ? IRQ_HANDLED : ret;
@@ -880,6 +883,9 @@ static irqreturn_t malidp_se_irq(int irq, void *arg)
status &= mask;
/* ToDo: status decoding and firing up of VSYNC and page flip events */
+ if (status & ~se->vsync_irq & se->irq_mask)
+ trace_printk("error occurred SE_STATUS is 0x%08X\n", status);
+
malidp_hw_clear_irq(hwdev, MALIDP_SE_BLOCK, status);
return IRQ_HANDLED;
--
2.7.4
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