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Message-ID: <20231207145020.GA17373@pendragon.ideasonboard.com>
Date: Thu, 7 Dec 2023 16:50:20 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: Paul Elder <paul.elder@...asonboard.com>,
linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
kieran.bingham@...asonboard.com, umang.jain@...asonboard.com,
Dafna Hirschfeld <dafna@...tmail.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Heiko Stuebner <heiko@...ech.de>,
"moderated list:ARM/Rockchip SoC support"
<linux-arm-kernel@...ts.infradead.org>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] media: rkisp1: debug: Consolidate counter debugfs
files
On Tue, Dec 05, 2023 at 10:22:47AM +0200, Tomi Valkeinen wrote:
> On 01/12/2023 16:04, Paul Elder wrote:
> > Consolidate all the debugfs files that were each a single counter into a
> > single "counters" file.
> >
> > While at it, reset the counters at stream on time to make it easier for
> > to interpret the values in userspace.
> >
> > Signed-off-by: Paul Elder <paul.elder@...asonboard.com>
> >
> > ---
> > New in v2
> >
> > .../platform/rockchip/rkisp1/rkisp1-capture.c | 2 +
> > .../platform/rockchip/rkisp1/rkisp1-common.h | 4 ++
> > .../platform/rockchip/rkisp1/rkisp1-debug.c | 69 ++++++++++++-------
> > 3 files changed, 50 insertions(+), 25 deletions(-)
> >
> > diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> > index c6d7e01c8949..67b2e94dfd67 100644
> > --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> > +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> > @@ -1030,6 +1030,8 @@ rkisp1_vb2_start_streaming(struct vb2_queue *queue, unsigned int count)
> > struct media_entity *entity = &cap->vnode.vdev.entity;
> > int ret;
> >
> > + rkisp1_debug_reset_counters(cap->rkisp1);
> > +
> > mutex_lock(&cap->rkisp1->stream_lock);
> >
> > ret = video_device_pipeline_start(&cap->vnode.vdev, &cap->rkisp1->pipe);
> > diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> > index be69173958a4..789259fb304a 100644
> > --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> > +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> > @@ -599,9 +599,13 @@ int rkisp1_params_register(struct rkisp1_device *rkisp1);
> > void rkisp1_params_unregister(struct rkisp1_device *rkisp1);
> >
> > #if IS_ENABLED(CONFIG_DEBUG_FS)
> > +void rkisp1_debug_reset_counters(struct rkisp1_device *rkisp1);
> > void rkisp1_debug_init(struct rkisp1_device *rkisp1);
> > void rkisp1_debug_cleanup(struct rkisp1_device *rkisp1);
> > #else
> > +static inline void rkisp1_debug_reset_counters(struct rkisp1_device *rkisp1)
> > +{
> > +}
> > static inline void rkisp1_debug_init(struct rkisp1_device *rkisp1)
> > {
> > }
> > diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c
> > index 79cda589d935..4358ed1367ed 100644
> > --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c
> > +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c
> > @@ -25,6 +25,11 @@ struct rkisp1_debug_register {
> > const char * const name;
> > };
> >
> > +struct rkisp1_debug_counter {
> > + const char * const name;
> > + unsigned long *value;
> > +};
> > +
> > #define RKISP1_DEBUG_REG(name) { RKISP1_CIF_##name, 0, #name }
> > #define RKISP1_DEBUG_SHD_REG(name) { \
> > RKISP1_CIF_##name, RKISP1_CIF_##name##_SHD, #name \
> > @@ -191,6 +196,43 @@ static int rkisp1_debug_input_status_show(struct seq_file *m, void *p)
> > }
> > DEFINE_SHOW_ATTRIBUTE(rkisp1_debug_input_status);
> >
> > +static int rkisp1_debug_counters_show(struct seq_file *m, void *p)
> > +{
> > + struct rkisp1_device *rkisp1 = m->private;
> > + struct rkisp1_debug *debug = &rkisp1->debug;
> > +
> > + const struct rkisp1_debug_counter counters[] = {
> > + { "data_loss", &debug->data_loss },
> > + { "outform_size_err", &debug->outform_size_error },
> > + { "img_stabilization_size_error", &debug->img_stabilization_size_error },
> > + { "inform_size_error", &debug->inform_size_error },
> > + { "irq_delay", &debug->irq_delay },
> > + { "mipi_error", &debug->mipi_error },
> > + { "stats_error", &debug->stats_error },
> > + { "mp_stop_timeout", &debug->stop_timeout[RKISP1_MAINPATH] },
> > + { "sp_stop_timeout", &debug->stop_timeout[RKISP1_SELFPATH] },
> > + { "mp_frame_drop", &debug->frame_drop[RKISP1_MAINPATH] },
> > + { "sp_frame_drop", &debug->frame_drop[RKISP1_SELFPATH] },
> > + { "complete_frames", &debug->complete_frames },
> > + { /* Sentinel */ },
> > + };
> > +
> > + const struct rkisp1_debug_counter *counter = counters;
> > +
> > + for (; counter->name; ++counter)
> > + seq_printf(m, "%s: %lu\n", counter->name, *counter->value);
> > +
>
> You could also do:
>
> const struct {
> const char *name;
> unsigned long value;
> } counters[] = {
> { "data_loss", debug->data_loss },
> { "outform_size_err", debug->outform_size_error },
> { "img_stabilization_size_error", debug->img_stabilization_size_error },
> { "inform_size_error", debug->inform_size_error },
> { "irq_delay", debug->irq_delay },
> { "mipi_error", debug->mipi_error },
> { "stats_error", debug->stats_error },
> { "mp_stop_timeout", debug->stop_timeout[RKISP1_MAINPATH] },
> { "sp_stop_timeout", debug->stop_timeout[RKISP1_SELFPATH] },
> { "mp_frame_drop", debug->frame_drop[RKISP1_MAINPATH] },
> { "sp_frame_drop", debug->frame_drop[RKISP1_SELFPATH] },
> { "complete_frames", debug->complete_frames },
> };
>
> for (unsigned int i = 0; i < ARRAY_SIZE(counters); ++i)
> seq_printf(m, "%s: %lu\n", counters[i].name, counters[i].value);
>
> Not a big difference, but this doesn't "leak" the struct used only inside the
> function, doesn't need the sentinel, and I don't see a reason to store pointers
> to values, instead of just storing the values.
Wouldn't it be nicer to avoid constructing this on the stack for every
call ? We could store the counters in an array:
enum rkisp1_debug_counter {
RKISP1_DBG_COUNT_DATA_LOSS,
...
RKISP1_DBG_COUNT_FRAME_DROP_MP,
RKISP1_DBG_COUNT_FRAME_DROP_SP,
RKISP1_DBG_COUNT_MAX,
};
struct rksisp1_debug {
struct dentry *debugfs_dir;
unsigned long counters[RKISP1_DBG_COUNT_MAX];
};
The counters[] array above would become a
static const char * const counter_names[] = {
[RKISP1_DBG_COUNT_DATA_LOSS] = "data_loss",
...
};
> > + return 0;
> > +}
> > +DEFINE_SHOW_ATTRIBUTE(rkisp1_debug_counters);
> > +
> > +void rkisp1_debug_reset_counters(struct rkisp1_device *rkisp1)
> > +{
> > + struct dentry *debugfs_dir = rkisp1->debug.debugfs_dir;
> > + memset(&rkisp1->debug, 0, sizeof(rkisp1->debug));
> > + rkisp1->debug.debugfs_dir = debugfs_dir;
> > +}
> > +
> > void rkisp1_debug_init(struct rkisp1_device *rkisp1)
> > {
> > struct rkisp1_debug *debug = &rkisp1->debug;
> > @@ -198,31 +240,8 @@ void rkisp1_debug_init(struct rkisp1_device *rkisp1)
> >
> > debug->debugfs_dir = debugfs_create_dir(dev_name(rkisp1->dev), NULL);
> >
> > - debugfs_create_ulong("data_loss", 0444, debug->debugfs_dir,
> > - &debug->data_loss);
> > - debugfs_create_ulong("outform_size_err", 0444, debug->debugfs_dir,
> > - &debug->outform_size_error);
> > - debugfs_create_ulong("img_stabilization_size_error", 0444,
> > - debug->debugfs_dir,
> > - &debug->img_stabilization_size_error);
> > - debugfs_create_ulong("inform_size_error", 0444, debug->debugfs_dir,
> > - &debug->inform_size_error);
> > - debugfs_create_ulong("irq_delay", 0444, debug->debugfs_dir,
> > - &debug->irq_delay);
> > - debugfs_create_ulong("mipi_error", 0444, debug->debugfs_dir,
> > - &debug->mipi_error);
> > - debugfs_create_ulong("stats_error", 0444, debug->debugfs_dir,
> > - &debug->stats_error);
> > - debugfs_create_ulong("mp_stop_timeout", 0444, debug->debugfs_dir,
> > - &debug->stop_timeout[RKISP1_MAINPATH]);
> > - debugfs_create_ulong("sp_stop_timeout", 0444, debug->debugfs_dir,
> > - &debug->stop_timeout[RKISP1_SELFPATH]);
> > - debugfs_create_ulong("mp_frame_drop", 0444, debug->debugfs_dir,
> > - &debug->frame_drop[RKISP1_MAINPATH]);
> > - debugfs_create_ulong("sp_frame_drop", 0444, debug->debugfs_dir,
> > - &debug->frame_drop[RKISP1_SELFPATH]);
> > - debugfs_create_ulong("complete_frames", 0444, debug->debugfs_dir,
> > - &debug->complete_frames);
> > + debugfs_create_file("counters", 0444, debug->debugfs_dir, rkisp1,
> > + &rkisp1_debug_counters_fops);
> > debugfs_create_file("input_status", 0444, debug->debugfs_dir, rkisp1,
> > &rkisp1_debug_input_status_fops);
> >
--
Regards,
Laurent Pinchart
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