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Subject[PATCH 2/2] media: stm32-dcmi: do not emit error trace in case of few overrun
Date
Report overrun error only when it exceeds a given threshold.

Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
---
drivers/media/platform/stm32/stm32-dcmi.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index 693415c..b63d57c 100644
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -97,6 +97,8 @@ enum state {

#define TIMEOUT_MS 1000

+#define OVERRUN_ERROR_THRESHOLD 3
+
struct dcmi_graph_entity {
struct device_node *node;

@@ -446,11 +448,13 @@ static irqreturn_t dcmi_irq_thread(int irq, void *arg)

spin_lock_irq(&dcmi->irqlock);

- if ((dcmi->misr & IT_OVR) || (dcmi->misr & IT_ERR)) {
- dcmi->errors_count++;
- if (dcmi->misr & IT_OVR)
- dcmi->overrun_count++;
+ if (dcmi->misr & IT_OVR) {
+ dcmi->overrun_count++;
+ if (dcmi->overrun_count > OVERRUN_ERROR_THRESHOLD)
+ dcmi->errors_count++;
}
+ if (dcmi->misr & IT_ERR)
+ dcmi->errors_count++;

if (dcmi->sd_format->fourcc == V4L2_PIX_FMT_JPEG &&
dcmi->misr & IT_FRAME) {
--
2.7.4
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