msm: isp: Handle ping pong mismatch error

Pingpong mismatch happens when there is a scheduling delay.
Recover from ping pong mismatch and print the debug information
into trace buffer.

Change-Id: Ib667a6e1368897837c1d0fe55487e69b521b1179
Signed-off-by: Abhishek Kondaveeti <akondave@codeaurora.org>

1 files changed, 136 insertions, 0 deletions

diff --git a/include/trace/events/msm_cam.h b/include/trace/events/msm_cam.h
new file mode 100644
index 000000000000..b52845407ef0
--- /dev/null
+++ b/include/trace/events/msm_cam.h
@@ -0,0 +1,136 @@
+/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM msm_cam
+
+#if !defined(_TRACE_MSM_VFE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_MSM_VFE_H
+
+#include "msm_isp.h"
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+#define STRING_LEN 80
+
+
+TRACE_EVENT(msm_cam_string,
+	TP_PROTO(const char *str),
+	TP_ARGS(str),
+	TP_STRUCT__entry(
+		__array(char, str, STRING_LEN)
+	),
+	TP_fast_assign(
+		strlcpy(__entry->str, str, STRING_LEN);
+	),
+	TP_printk("msm_cam: %s", __entry->str)
+);
+
+TRACE_EVENT(msm_cam_tasklet_debug_dump,
+	TP_PROTO(struct msm_vfe_irq_debug_info tasklet_state),
+	TP_ARGS(tasklet_state),
+	TP_STRUCT__entry(
+		__field(unsigned int, vfe_id)
+		__field(unsigned int, core_id)
+		__field(unsigned int, irq_status0)
+		__field(unsigned int, irq_status1)
+		__field(unsigned int, ping_pong_status)
+		__field(long, tv_sec)
+		__field(long, tv_usec)
+	),
+	TP_fast_assign(
+		__entry->vfe_id = tasklet_state.vfe_id;
+		__entry->irq_status0 =
+			tasklet_state.irq_status0[tasklet_state.vfe_id];
+		__entry->irq_status1 =
+			tasklet_state.irq_status1[tasklet_state.vfe_id];
+		__entry->core_id = tasklet_state.core_id;
+		__entry->ping_pong_status =
+			tasklet_state.ping_pong_status[tasklet_state.vfe_id];
+		__entry->tv_sec =
+			tasklet_state.ts.buf_time.tv_sec;
+		__entry->tv_usec =
+			tasklet_state.ts.buf_time.tv_usec;
+	),
+	TP_printk("vfe_id %d, core %d, irq_st0 0x%x, irq_st1 0x%x\n"
+		"pi_po_st 0x%x, time %ld:%ld",
+		__entry->vfe_id,
+		__entry->core_id,
+		__entry->irq_status0,
+		__entry->irq_status1,
+		__entry->ping_pong_status,
+		__entry->tv_sec,
+		__entry->tv_usec
+	)
+);
+
+TRACE_EVENT(msm_cam_ping_pong_debug_dump,
+	TP_PROTO(struct msm_vfe_irq_debug_info ping_pong_state),
+	TP_ARGS(ping_pong_state),
+	TP_STRUCT__entry(
+		__field(unsigned int, curr_vfe_id)
+		__field(unsigned int, curr_irq_status0)
+		__field(unsigned int, curr_irq_status1)
+		__field(unsigned int, curr_ping_pong_status)
+		__field(unsigned int, othr_vfe_id)
+		__field(unsigned int, othr_irq_status0)
+		__field(unsigned int, othr_irq_status1)
+		__field(unsigned int, othr_ping_pong_status)
+		__field(long, othr_tv_sec)
+		__field(long, othr_tv_usec)
+		__field(unsigned int, core_id)
+	),
+	TP_fast_assign(
+		__entry->curr_vfe_id =
+			ping_pong_state.vfe_id;
+		__entry->curr_irq_status0 =
+			ping_pong_state.irq_status0[ping_pong_state.vfe_id];
+		__entry->curr_irq_status1 =
+			ping_pong_state.irq_status1[ping_pong_state.vfe_id];
+		__entry->curr_ping_pong_status =
+			ping_pong_state.
+			ping_pong_status[ping_pong_state.vfe_id];
+		__entry->othr_vfe_id =
+			!ping_pong_state.vfe_id;
+		__entry->othr_irq_status0 =
+			ping_pong_state.irq_status0[!ping_pong_state.vfe_id];
+		__entry->othr_irq_status1 =
+			ping_pong_state.irq_status1[!ping_pong_state.vfe_id];
+		__entry->othr_ping_pong_status =
+			ping_pong_state.
+			ping_pong_status[!ping_pong_state.vfe_id];
+		__entry->othr_tv_sec =
+			ping_pong_state.ts.buf_time.tv_sec;
+		__entry->othr_tv_usec =
+			ping_pong_state.ts.buf_time.tv_usec;
+		__entry->core_id = ping_pong_state.core_id;
+	),
+	TP_printk("vfe_id %d, irq_st0 0x%x, irq_st1 0x%x, pi_po_st 0x%x\n"
+		"other vfe_id %d, irq_st0 0x%x, irq_st1 0x%x\n"
+		"pi_po_st 0x%x, time %ld:%ld core %d",
+		__entry->curr_vfe_id,
+		__entry->curr_irq_status0,
+		__entry->curr_irq_status1,
+		__entry->curr_ping_pong_status,
+		__entry->othr_vfe_id,
+		__entry->othr_irq_status0,
+		__entry->othr_irq_status1,
+		__entry->othr_ping_pong_status,
+		__entry->othr_tv_sec,
+		__entry->othr_tv_usec,
+		__entry->core_id
+	)
+);
+
+#endif /* _MSM_CAM_TRACE_H */
+/* This part must be outside protection */
+#include <trace/define_trace.h>