@@ -326,6 +326,7 @@ struct rkisp1_debug {
unsigned long outform_size_error;
unsigned long img_stabilization_size_error;
unsigned long inform_size_error;
+ unsigned long irq_delay;
unsigned long mipi_error;
unsigned long stats_error;
unsigned long stop_timeout[2];
@@ -444,6 +444,8 @@ static void rkisp1_debug_init(struct rkisp1_device *rkisp1)
&debug->img_stabilization_size_error);
debugfs_create_ulong("inform_size_error", 0444, debug->debugfs_dir,
&debug->inform_size_error);
+ debugfs_create_ulong("irq_delay", 0444, debug->debugfs_dir,
+ &debug->irq_delay);
debugfs_create_ulong("mipi_error", 0444, debug->debugfs_dir,
&debug->mipi_error);
debugfs_create_ulong("stats_error", 0444, debug->debugfs_dir,
@@ -1111,6 +1111,10 @@ void rkisp1_isp_isr(struct rkisp1_device *rkisp1)
if (status & RKISP1_CIF_ISP_V_START) {
rkisp1->isp.frame_sequence++;
rkisp1_isp_queue_event_sof(&rkisp1->isp);
+ if (status & RKISP1_CIF_ISP_FRAME) {
+ WARN_ONCE(1, "irq delay is too long, buffers might not be in sync\n");
+ rkisp1->debug.irq_delay++;
+ }
}
if (status & RKISP1_CIF_ISP_PIC_SIZE_ERROR) {
/* Clear pic_size_error */
The signal RKISP1_CIF_ISP_FRAME is set when the ISP completes outputting the frame to the next block in the pipeline. In order to keep buffer synchronization we assume that the RKISP1_CIF_ISP_V_START signal never arrives together with the RKISP1_CIF_ISP_FRAME signal. In case those signals arrive together then the code is not able to tell if the RKISP1_CIF_ISP_FRAME signal relates to the frame of the current v-start or the previous. This patch adds a WARN_ONCE and a debugfs var to catch it. Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com> --- changes since v2: remove unneeded closing "}" due to fixing "media: staging: rkisp1: remove atomic operations for frame sequence" --- drivers/staging/media/rkisp1/rkisp1-common.h | 1 + drivers/staging/media/rkisp1/rkisp1-dev.c | 2 ++ drivers/staging/media/rkisp1/rkisp1-isp.c | 4 ++++ 3 files changed, 7 insertions(+)