Print underrun interrupts with ratelimited print.
Note that we don't enable the underrun interrupt. If we have underruns,
we don't want to get flooded with interrupts about them. It's enough to
see that an underrun happened at the end of a frame.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx>
---
Changes in v2:
- Add underrun count
drivers/media/platform/renesas/vsp1/vsp1.h | 2 ++
drivers/media/platform/renesas/vsp1/vsp1_drv.c | 11 ++++++++++-
drivers/media/platform/renesas/vsp1/vsp1_regs.h | 2 ++
3 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/renesas/vsp1/vsp1.h b/drivers/media/platform/renesas/vsp1/vsp1.h
index 2f6f0c6ae555..9eb023f4fee8 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1.h
+++ b/drivers/media/platform/renesas/vsp1/vsp1.h
@@ -107,6 +107,8 @@ struct vsp1_device {
struct media_entity_operations media_ops;
struct vsp1_drm *drm;
+
+ u32 underrun_count[VSP1_MAX_WPF];
};
int vsp1_device_get(struct vsp1_device *vsp1);
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_drv.c b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
index 5710152d6511..f9be0fda1659 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_drv.c
+++ b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
@@ -45,7 +45,8 @@
static irqreturn_t vsp1_irq_handler(int irq, void *data)
{
- u32 mask = VI6_WPF_IRQ_STA_DFE | VI6_WPF_IRQ_STA_FRE;
+ u32 mask = VI6_WPF_IRQ_STA_DFE | VI6_WPF_IRQ_STA_FRE |
+ VI6_WPF_IRQ_STA_UND;
struct vsp1_device *vsp1 = data;
irqreturn_t ret = IRQ_NONE;
unsigned int i;
@@ -60,6 +61,14 @@ static irqreturn_t vsp1_irq_handler(int irq, void *data)
status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i));
vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
+ if (status & VI6_WPF_IRQ_STA_UND) {
+ vsp1->underrun_count[i]++;
+
+ dev_warn_ratelimited(vsp1->dev,
+ "Underrun occurred at WPF%u (total underruns %u)\n",
+ i, vsp1->underrun_count[i]);
+ }
+
if (status & VI6_WPF_IRQ_STA_DFE) {
vsp1_pipeline_frame_end(wpf->entity.pipe);
ret = IRQ_HANDLED;
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_regs.h b/drivers/media/platform/renesas/vsp1/vsp1_regs.h
index d94343ae57a1..7eca82e0ba7e 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_regs.h
+++ b/drivers/media/platform/renesas/vsp1/vsp1_regs.h
@@ -32,10 +32,12 @@
#define VI6_STATUS_SYS_ACT(n) BIT((n) + 8)
#define VI6_WPF_IRQ_ENB(n) (0x0048 + (n) * 12)
+#define VI6_WPF_IRQ_ENB_UNDE BIT(16)
#define VI6_WPF_IRQ_ENB_DFEE BIT(1)
#define VI6_WPF_IRQ_ENB_FREE BIT(0)
#define VI6_WPF_IRQ_STA(n) (0x004c + (n) * 12)
+#define VI6_WPF_IRQ_STA_UND BIT(16)
#define VI6_WPF_IRQ_STA_DFE BIT(1)
#define VI6_WPF_IRQ_STA_FRE BIT(0)
--
2.34.1
