6914f8eb64
Store the timestamp of the current vblank in the new field 'time' of the vblank trace event. If the timestamp is calculated by a driver that supports high-precision vblank timing, set the field 'high-prec' to 'true'. User space can now access actual hardware vblank times via the tracing infrastructure. Tracing applications (such as GPUVis, see [0] for related discussion), can use the newly added information to conduct a more accurate analysis of display timing. v2 Fix author name (missing last name) [0] https://github.com/mikesart/gpuvis/issues/30 Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Heinrich Fink <heinrich.fink@daqri.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20190902142412.27846-2-heinrich.fink@daqri.com
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#if !defined(_DRM_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
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#define _DRM_TRACE_H_
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#include <linux/stringify.h>
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#include <linux/types.h>
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#include <linux/tracepoint.h>
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struct drm_file;
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM drm
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#define TRACE_INCLUDE_FILE drm_trace
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TRACE_EVENT(drm_vblank_event,
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TP_PROTO(int crtc, unsigned int seq, ktime_t time, bool high_prec),
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TP_ARGS(crtc, seq, time, high_prec),
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TP_STRUCT__entry(
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__field(int, crtc)
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__field(unsigned int, seq)
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__field(ktime_t, time)
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__field(bool, high_prec)
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),
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TP_fast_assign(
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__entry->crtc = crtc;
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__entry->seq = seq;
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__entry->time = time;
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__entry->high_prec = high_prec;
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),
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TP_printk("crtc=%d, seq=%u, time=%lld, high-prec=%s",
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__entry->crtc, __entry->seq, __entry->time,
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__entry->high_prec ? "true" : "false")
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);
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TRACE_EVENT(drm_vblank_event_queued,
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TP_PROTO(struct drm_file *file, int crtc, unsigned int seq),
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TP_ARGS(file, crtc, seq),
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TP_STRUCT__entry(
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__field(struct drm_file *, file)
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__field(int, crtc)
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__field(unsigned int, seq)
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),
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TP_fast_assign(
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__entry->file = file;
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__entry->crtc = crtc;
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__entry->seq = seq;
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),
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TP_printk("file=%p, crtc=%d, seq=%u", __entry->file, __entry->crtc, \
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__entry->seq)
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);
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TRACE_EVENT(drm_vblank_event_delivered,
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TP_PROTO(struct drm_file *file, int crtc, unsigned int seq),
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TP_ARGS(file, crtc, seq),
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TP_STRUCT__entry(
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__field(struct drm_file *, file)
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__field(int, crtc)
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__field(unsigned int, seq)
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),
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TP_fast_assign(
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__entry->file = file;
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__entry->crtc = crtc;
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__entry->seq = seq;
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),
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TP_printk("file=%p, crtc=%d, seq=%u", __entry->file, __entry->crtc, \
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__entry->seq)
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);
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#endif /* _DRM_TRACE_H_ */
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/* This part must be outside protection */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH ../../drivers/gpu/drm
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#include <trace/define_trace.h>
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