On Monday, 8 December 2025 18:14:53 Central European Standard Time Karunika
Choo wrote:
> On 03/12/2025 13:56, Nicolas Frattaroli wrote:
> > [... snip ...]
> > diff --git a/drivers/gpu/drm/panthor/panthor_trace.h
> > b/drivers/gpu/drm/panthor/panthor_trace.h
> > new file mode 100644
> > index 000000000000..01013f81e68a
> > --- /dev/null
> > +++ b/drivers/gpu/drm/panthor/panthor_trace.h
> > @@ -0,0 +1,38 @@
> > +/* SPDX-License-Identifier: GPL-2.0 or MIT */
> > +/* Copyright 2025 Collabora ltd. */
> > +
> > +#undef TRACE_SYSTEM
> > +#define TRACE_SYSTEM panthor
> > +
> > +#if !defined(__PANTHOR_TRACE_H__) || defined(TRACE_HEADER_MULTI_READ)
> > +#define __PANTHOR_TRACE_H__
> > +
> > +#include <linux/tracepoint.h>
> > +#include <linux/types.h>
> > +
> > +TRACE_EVENT(gpu_power_active,
> > + TP_PROTO(u64 shader_bitmap, u64 tiler_bitmap, u64 l2_bitmap),
>
> nit: if you want to add tracing can we also add the device name as
> well? Something like:
>
> TP_PROTO(struct device *dev, ...),
> TP_ARGS(dev, ...),
> TP_STRUCT__ENTRY(
> __string(dev_name, dev_name(dev))
> ...
> ).
> ...
This is a great idea, will do. Any specific reason to pass the
device in the tracepoint rather than a const char*?
>
> This will help differentiate the device it is originating from in
> a multi GPU situation.
I'll try not to get too excited at the prospect of systems using
multiple Mali GPUs because I know the likeliest case this happens
on is Arm evaluation systems with a hard IP and a soft IP loaded to
the FPGA core. :)
Kind regards,
Nicolas Frattaroli
>
> Kind regards,
> Karunika
>
> > + TP_ARGS(shader_bitmap, tiler_bitmap, l2_bitmap),
> > + TP_STRUCT__entry(
> > + __field(u64, shader_bitmap)
> > + __field(u64, tiler_bitmap)
> > + __field(u64, l2_bitmap)
> > + ),
> > + TP_fast_assign(
> > + __entry->shader_bitmap = shader_bitmap;
> > + __entry->tiler_bitmap = tiler_bitmap;
> > + __entry->l2_bitmap = l2_bitmap;
> > + ),
> > + TP_printk("shader_bitmap=0x%llx tiler_bitmap=0x%llx l2_bitmap=0x%llx",
> > + __entry->shader_bitmap, __entry->tiler_bitmap,
> > __entry->l2_bitmap
> > + )
> > +);
> > +
> > +#endif /* __PANTHOR_TRACE_H__ */
> > +
> > +#undef TRACE_INCLUDE_PATH
> > +#define TRACE_INCLUDE_PATH .
> > +#undef TRACE_INCLUDE_FILE
> > +#define TRACE_INCLUDE_FILE panthor_trace
> > +
> > +#include <trace/define_trace.h>
> >
>
>
>
