Re: [PATCH v4 5/9] drm/i915: Add pipe update trace points

[Daniel Vetter <daniel@ffwll.ch>]

On Tue, Apr 29, 2014 at 01:35:48PM +0300, ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Add trace points for observing the atomic pipe update mechanism.
> 
> v2: Rebased due to earlier changes
> v3: Pass intel_crtc instead of drm_crtc (Daniel)
> v4: Pass frame counter from the caller to evaded/end since
>     the caller now always has that ready
> 
> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
> Reviewed-by: Sourab Gupta <sourabgupta@gmail.com>
> Reviewed-by: Akash Goel <akash.goels@gmail.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

Merged up to this one here. Can you please update the review-AR for Akash
and Sourab for the remaining patches?

Thanks, Daniel

> ---
>  drivers/gpu/drm/i915/i915_trace.h   | 75 +++++++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_sprite.c |  6 +++
>  2 files changed, 81 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
> index 23c26f1..b29d7b1 100644
> --- a/drivers/gpu/drm/i915/i915_trace.h
> +++ b/drivers/gpu/drm/i915/i915_trace.h
> @@ -7,6 +7,7 @@
>  
>  #include <drm/drmP.h>
>  #include "i915_drv.h"
> +#include "intel_drv.h"
>  #include "intel_ringbuffer.h"
>  
>  #undef TRACE_SYSTEM
> @@ -14,6 +15,80 @@
>  #define TRACE_SYSTEM_STRING __stringify(TRACE_SYSTEM)
>  #define TRACE_INCLUDE_FILE i915_trace
>  
> +/* pipe updates */
> +
> +TRACE_EVENT(i915_pipe_update_start,
> +	    TP_PROTO(struct intel_crtc *crtc, u32 min, u32 max),
> +	    TP_ARGS(crtc, min, max),
> +
> +	    TP_STRUCT__entry(
> +			     __field(enum pipe, pipe)
> +			     __field(u32, frame)
> +			     __field(u32, scanline)
> +			     __field(u32, min)
> +			     __field(u32, max)
> +			     ),
> +
> +	    TP_fast_assign(
> +			   __entry->pipe = crtc->pipe;
> +			   __entry->frame = crtc->base.dev->driver->get_vblank_counter(crtc->base.dev,
> +										       crtc->pipe);
> +			   __entry->scanline = intel_get_crtc_scanline(crtc);
> +			   __entry->min = min;
> +			   __entry->max = max;
> +			   ),
> +
> +	    TP_printk("pipe %c, frame=%u, scanline=%u, min=%u, max=%u",
> +		      pipe_name(__entry->pipe), __entry->frame,
> +		       __entry->scanline, __entry->min, __entry->max)
> +);
> +
> +TRACE_EVENT(i915_pipe_update_vblank_evaded,
> +	    TP_PROTO(struct intel_crtc *crtc, u32 min, u32 max, u32 frame),
> +	    TP_ARGS(crtc, min, max, frame),
> +
> +	    TP_STRUCT__entry(
> +			     __field(enum pipe, pipe)
> +			     __field(u32, frame)
> +			     __field(u32, scanline)
> +			     __field(u32, min)
> +			     __field(u32, max)
> +			     ),
> +
> +	    TP_fast_assign(
> +			   __entry->pipe = crtc->pipe;
> +			   __entry->frame = frame;
> +			   __entry->scanline = intel_get_crtc_scanline(crtc);
> +			   __entry->min = min;
> +			   __entry->max = max;
> +			   ),
> +
> +	    TP_printk("pipe %c, frame=%u, scanline=%u, min=%u, max=%u",
> +		      pipe_name(__entry->pipe), __entry->frame,
> +		       __entry->scanline, __entry->min, __entry->max)
> +);
> +
> +TRACE_EVENT(i915_pipe_update_end,
> +	    TP_PROTO(struct intel_crtc *crtc, u32 frame),
> +	    TP_ARGS(crtc, frame),
> +
> +	    TP_STRUCT__entry(
> +			     __field(enum pipe, pipe)
> +			     __field(u32, frame)
> +			     __field(u32, scanline)
> +			     ),
> +
> +	    TP_fast_assign(
> +			   __entry->pipe = crtc->pipe;
> +			   __entry->frame = frame;
> +			   __entry->scanline = intel_get_crtc_scanline(crtc);
> +			   ),
> +
> +	    TP_printk("pipe %c, frame=%u, scanline=%u",
> +		      pipe_name(__entry->pipe), __entry->frame,
> +		      __entry->scanline)
> +);
> +
>  /* object tracking */
>  
>  TRACE_EVENT(i915_gem_object_create,
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 6192e58..213cd58 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -73,6 +73,8 @@ static bool intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl
>  
>  	local_irq_disable();
>  
> +	trace_i915_pipe_update_start(crtc, min, max);
> +
>  	for (;;) {
>  		/*
>  		 * prepare_to_wait() has a memory barrier, which guarantees
> @@ -104,6 +106,8 @@ static bool intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl
>  
>  	*start_vbl_count = dev->driver->get_vblank_counter(dev, pipe);
>  
> +	trace_i915_pipe_update_vblank_evaded(crtc, min, max, *start_vbl_count);
> +
>  	return true;
>  }
>  
> @@ -113,6 +117,8 @@ static void intel_pipe_update_end(struct intel_crtc *crtc, u32 start_vbl_count)
>  	enum pipe pipe = crtc->pipe;
>  	u32 end_vbl_count = dev->driver->get_vblank_counter(dev, pipe);
>  
> +	trace_i915_pipe_update_end(crtc, end_vbl_count);
> +
>  	local_irq_enable();
>  
>  	if (start_vbl_count != end_vbl_count)
> -- 
> 1.8.3.2
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch