diff options
| author | Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> | 2021-03-10 10:04:56 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-04-09 16:47:57 -0400 |
| commit | 4758823355a0ed90bd9bfec508de41635a75d4d1 (patch) | |
| tree | 3f79985c3918dc7859776a555b12199628b0683c /drivers/gpu/drm/amd/display | |
| parent | 95574c6961476e26236f16b48bfd98d6a1ceff4c (diff) | |
drm/amd/display: Add refresh rate trace
When we have to debug VRR issues, we usually want to know the current
refresh rate; for this reason, it is handy to have a way to check in
real-time the refresh rate value. This commit introduces a kernel trace
that can provide such information.
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h | 19 |
3 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 49f963b0c715..10efd5382511 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -460,6 +460,9 @@ static void dm_vupdate_high_irq(void *interrupt_params) struct common_irq_params *irq_params = interrupt_params; struct amdgpu_device *adev = irq_params->adev; struct amdgpu_crtc *acrtc; + struct drm_device *drm_dev; + struct drm_vblank_crtc *vblank; + ktime_t frame_duration_ns, previous_timestamp; unsigned long flags; int vrr_active; @@ -467,6 +470,17 @@ static void dm_vupdate_high_irq(void *interrupt_params) if (acrtc) { vrr_active = amdgpu_dm_vrr_active_irq(acrtc); + drm_dev = acrtc->base.dev; + vblank = &drm_dev->vblank[acrtc->base.index]; + previous_timestamp = atomic64_read(&irq_params->previous_timestamp); + frame_duration_ns = vblank->time - previous_timestamp; + + if (frame_duration_ns > 0) { + trace_amdgpu_refresh_rate_track(acrtc->base.index, + frame_duration_ns, + ktime_divns(NSEC_PER_SEC, frame_duration_ns)); + atomic64_set(&irq_params->previous_timestamp, vblank->time); + } DRM_DEBUG_VBL("crtc:%d, vupdate-vrr:%d\n", acrtc->crtc_id, diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index 3ec33696a9bd..32f9c349bb19 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -66,6 +66,7 @@ struct dc_plane_state; struct common_irq_params { struct amdgpu_device *adev; enum dc_irq_source irq_src; + atomic64_t previous_timestamp; }; /** diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h index ac8bcd171b57..46a33f64cf8e 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_trace.h @@ -618,6 +618,25 @@ TRACE_EVENT(amdgpu_dmub_trace_high_irq, __entry->param0, __entry->param1) ); +TRACE_EVENT(amdgpu_refresh_rate_track, + TP_PROTO(int crtc_index, ktime_t refresh_rate_ns, uint32_t refresh_rate_hz), + TP_ARGS(crtc_index, refresh_rate_ns, refresh_rate_hz), + TP_STRUCT__entry( + __field(int, crtc_index) + __field(ktime_t, refresh_rate_ns) + __field(uint32_t, refresh_rate_hz) + ), + TP_fast_assign( + __entry->crtc_index = crtc_index; + __entry->refresh_rate_ns = refresh_rate_ns; + __entry->refresh_rate_hz = refresh_rate_hz; + ), + TP_printk("crtc_index=%d refresh_rate=%dHz (%lld)", + __entry->crtc_index, + __entry->refresh_rate_hz, + __entry->refresh_rate_ns) +); + #endif /* _AMDGPU_DM_TRACE_H_ */ #undef TRACE_INCLUDE_PATH |