[media] coda: Add tracing support

This patch adds tracepoints to the coda driver that can be used together
with the v4l2:v4l2_qbuf and v4l2:v4l2_dqbuf tracepoints to to follow video
frames through the mem2mem device.

For encoding with the BIT processor:
    coda:coda_enc_pic_run
    coda:coda_enc_pic_done

For decoding with the BIT processor:
    coda:coda_bit_queue
    coda:coda_dec_pic_run
    coda:coda_dec_pic_done
    coda:coda_dec_rot_done

Additionally, two low level tracepoints register whenever the BIT processor
is started and returns:
    coda:coda_bit_run
    coda:coda_bit_done

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 203 insertions, 0 deletions

diff --git a/drivers/media/platform/coda/trace.h b/drivers/media/platform/coda/trace.h
new file mode 100644
index 000000000000..d1d06cbd1f6a
--- /dev/null
+++ b/drivers/media/platform/coda/trace.h
@@ -0,0 +1,203 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM coda
+
+#if !defined(__CODA_TRACE_H__) || defined(TRACE_HEADER_MULTI_READ)
+#define __CODA_TRACE_H__
+
+#include <linux/tracepoint.h>
+#include <media/videobuf2-core.h>
+
+#include "coda.h"
+
+#define TRACE_SYSTEM_STRING __stringify(TRACE_SYSTEM)
+
+TRACE_EVENT(coda_bit_run,
+	TP_PROTO(struct coda_ctx *ctx, int cmd),
+
+	TP_ARGS(ctx, cmd),
+
+	TP_STRUCT__entry(
+		__field(int, minor)
+		__field(int, ctx)
+		__field(int, cmd)
+	),
+
+	TP_fast_assign(
+		__entry->minor = ctx->fh.vdev->minor;
+		__entry->ctx = ctx->idx;
+		__entry->cmd = cmd;
+	),
+
+	TP_printk("minor = %d, ctx = %d, cmd = %d",
+		  __entry->minor, __entry->ctx, __entry->cmd)
+);
+
+TRACE_EVENT(coda_bit_done,
+	TP_PROTO(struct coda_ctx *ctx),
+
+	TP_ARGS(ctx),
+
+	TP_STRUCT__entry(
+		__field(int, minor)
+		__field(int, ctx)
+	),
+
+	TP_fast_assign(
+		__entry->minor = ctx->fh.vdev->minor;
+		__entry->ctx = ctx->idx;
+	),
+
+	TP_printk("minor = %d, ctx = %d", __entry->minor, __entry->ctx)
+);
+
+TRACE_EVENT(coda_enc_pic_run,
+	TP_PROTO(struct coda_ctx *ctx, struct vb2_buffer *buf),
+
+	TP_ARGS(ctx, buf),
+
+	TP_STRUCT__entry(
+		__field(int, minor)
+		__field(int, index)
+		__field(int, ctx)
+	),
+
+	TP_fast_assign(
+		__entry->minor = ctx->fh.vdev->minor;
+		__entry->index = buf->v4l2_buf.index;
+		__entry->ctx = ctx->idx;
+	),
+
+	TP_printk("minor = %d, index = %d, ctx = %d",
+		  __entry->minor, __entry->index, __entry->ctx)
+);
+
+TRACE_EVENT(coda_enc_pic_done,
+	TP_PROTO(struct coda_ctx *ctx, struct vb2_buffer *buf),
+
+	TP_ARGS(ctx, buf),
+
+	TP_STRUCT__entry(
+		__field(int, minor)
+		__field(int, index)
+		__field(int, ctx)
+	),
+
+	TP_fast_assign(
+		__entry->minor = ctx->fh.vdev->minor;
+		__entry->index = buf->v4l2_buf.index;
+		__entry->ctx = ctx->idx;
+	),
+
+	TP_printk("minor = %d, index = %d, ctx = %d",
+		  __entry->minor, __entry->index, __entry->ctx)
+);
+
+TRACE_EVENT(coda_bit_queue,
+	TP_PROTO(struct coda_ctx *ctx, struct vb2_buffer *buf,
+		 struct coda_buffer_meta *meta),
+
+	TP_ARGS(ctx, buf, meta),
+
+	TP_STRUCT__entry(
+		__field(int, minor)
+		__field(int, index)
+		__field(int, start)
+		__field(int, end)
+		__field(int, ctx)
+	),
+
+	TP_fast_assign(
+		__entry->minor = ctx->fh.vdev->minor;
+		__entry->index = buf->v4l2_buf.index;
+		__entry->start = meta->start;
+		__entry->end = meta->end;
+		__entry->ctx = ctx->idx;
+	),
+
+	TP_printk("minor = %d, index = %d, start = 0x%x, end = 0x%x, ctx = %d",
+		  __entry->minor, __entry->index, __entry->start, __entry->end,
+		  __entry->ctx)
+);
+
+TRACE_EVENT(coda_dec_pic_run,
+	TP_PROTO(struct coda_ctx *ctx, struct coda_buffer_meta *meta),
+
+	TP_ARGS(ctx, meta),
+
+	TP_STRUCT__entry(
+		__field(int, minor)
+		__field(int, start)
+		__field(int, end)
+		__field(int, ctx)
+	),
+
+	TP_fast_assign(
+		__entry->minor = ctx->fh.vdev->minor;
+		__entry->start = meta ? meta->start : 0;
+		__entry->end = meta ? meta->end : 0;
+		__entry->ctx = ctx->idx;
+	),
+
+	TP_printk("minor = %d, start = 0x%x, end = 0x%x, ctx = %d",
+		  __entry->minor, __entry->start, __entry->end, __entry->ctx)
+);
+
+TRACE_EVENT(coda_dec_pic_done,
+	TP_PROTO(struct coda_ctx *ctx, struct coda_buffer_meta *meta),
+
+	TP_ARGS(ctx, meta),
+
+	TP_STRUCT__entry(
+		__field(int, minor)
+		__field(int, start)
+		__field(int, end)
+		__field(int, ctx)
+	),
+
+	TP_fast_assign(
+		__entry->minor = ctx->fh.vdev->minor;
+		__entry->start = meta->start;
+		__entry->end = meta->end;
+		__entry->ctx = ctx->idx;
+	),
+
+	TP_printk("minor = %d, start = 0x%x, end = 0x%x, ctx = %d",
+		  __entry->minor, __entry->start, __entry->end, __entry->ctx)
+);
+
+TRACE_EVENT(coda_dec_rot_done,
+	TP_PROTO(struct coda_ctx *ctx, struct coda_buffer_meta *meta,
+		 struct vb2_buffer *buf),
+
+	TP_ARGS(ctx, meta, buf),
+
+	TP_STRUCT__entry(
+		__field(int, minor)
+		__field(int, start)
+		__field(int, end)
+		__field(int, index)
+		__field(int, ctx)
+	),
+
+	TP_fast_assign(
+		__entry->minor = ctx->fh.vdev->minor;
+		__entry->start = meta->start;
+		__entry->end = meta->end;
+		__entry->index = buf->v4l2_buf.index;
+		__entry->ctx = ctx->idx;
+	),
+
+	TP_printk("minor = %d, start = 0x%x, end = 0x%x, index = %d, ctx = %d",
+		  __entry->minor, __entry->start, __entry->end, __entry->index,
+		  __entry->ctx)
+);
+
+#endif /* __CODA_TRACE_H__ */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>