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drm/i915: Add pipe enable/disable tracepoints 

Add tracepoints for pipe enable/disable. We'll include the
frame/scanline counters for all pipes in these tracepoints to
help in diagnosing underruns and whatnot when enabling/disabling
pipes in parallel with plane updates/flips on another pipe.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190206204910.13965-2-ville.syrjala@linux.intel.com
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Ville Syrjälä 2019-02-06 22:49:08 +02:00
parent 5cee6c4587
commit 0b2599a43c
2 changed files with 60 additions and 0 deletions
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56
drivers/gpu/drm/i915/i915_trace.h
View File

@ -16,6 +16,62 @@
/* watermark/fifo updates */
TRACE_EVENT(intel_pipe_enable,
TP_PROTO(struct drm_i915_private *dev_priv, enum pipe pipe),
TP_ARGS(dev_priv, pipe),
TP_STRUCT__entry(
__array(u32, frame, 3)
__array(u32, scanline, 3)
__field(enum pipe, pipe)
),
TP_fast_assign(
enum pipe _pipe;
for_each_pipe(dev_priv, _pipe) {
__entry->frame[_pipe] =
dev_priv->drm.driver->get_vblank_counter(&dev_priv->drm, _pipe);
__entry->scanline[_pipe] =
intel_get_crtc_scanline(intel_get_crtc_for_pipe(dev_priv, _pipe));
}
__entry->pipe = pipe;
),
TP_printk("pipe %c enable, pipe A: frame=%u, scanline=%u, pipe B: frame=%u, scanline=%u, pipe C: frame=%u, scanline=%u",
pipe_name(__entry->pipe),
__entry->frame[PIPE_A], __entry->scanline[PIPE_A],
__entry->frame[PIPE_B], __entry->scanline[PIPE_B],
__entry->frame[PIPE_C], __entry->scanline[PIPE_C])
);
TRACE_EVENT(intel_pipe_disable,
TP_PROTO(struct drm_i915_private *dev_priv, enum pipe pipe),
TP_ARGS(dev_priv, pipe),
TP_STRUCT__entry(
__array(u32, frame, 3)
__array(u32, scanline, 3)
__field(enum pipe, pipe)
),
TP_fast_assign(
enum pipe _pipe;
for_each_pipe(dev_priv, _pipe) {
__entry->frame[_pipe] =
dev_priv->drm.driver->get_vblank_counter(&dev_priv->drm, _pipe);
__entry->scanline[_pipe] =
intel_get_crtc_scanline(intel_get_crtc_for_pipe(dev_priv, _pipe));
}
__entry->pipe = pipe;
),
TP_printk("pipe %c disable, pipe A: frame=%u, scanline=%u, pipe B: frame=%u, scanline=%u, pipe C: frame=%u, scanline=%u",
pipe_name(__entry->pipe),
__entry->frame[PIPE_A], __entry->scanline[PIPE_A],
__entry->frame[PIPE_B], __entry->scanline[PIPE_B],
__entry->frame[PIPE_C], __entry->scanline[PIPE_C])
);
TRACE_EVENT(intel_pipe_crc,
TP_PROTO(struct intel_crtc *crtc, const u32 *crcs),
TP_ARGS(crtc, crcs),

4
drivers/gpu/drm/i915/intel_display.c
View File

@ -1821,6 +1821,8 @@ static void intel_enable_pipe(const struct intel_crtc_state *new_crtc_state)
/* FIXME: assert CPU port conditions for SNB+ */
}
trace_intel_pipe_enable(dev_priv, pipe);
reg = PIPECONF(cpu_transcoder);
val = I915_READ(reg);
if (val & PIPECONF_ENABLE) {
@ -1860,6 +1862,8 @@ static void intel_disable_pipe(const struct intel_crtc_state *old_crtc_state)
*/
assert_planes_disabled(crtc);
trace_intel_pipe_disable(dev_priv, pipe);
reg = PIPECONF(cpu_transcoder);
val = I915_READ(reg);
if ((val & PIPECONF_ENABLE) == 0)