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Message-ID: <16ccd042-cddd-3a2d-589b-8091aef0b405@molgen.mpg.de>
Date: Mon, 25 Oct 2021 12:16:11 +0200
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Jammy Huang <jammy_huang@...eedtech.com>
Cc: eajames@...ux.ibm.com, mchehab@...nel.org, joel@....id.au,
andrew@...id.au, linux-media@...r.kernel.org,
openbmc@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org,
linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] media: aspeed: add debugfs
Dear Jammy,
On 25.10.21 12:10, Jammy Huang wrote:
> A debugfs file, /sys/kernel/debug/aspeed-video, will be created. You can
> read it to get video real-time information as below:
>
> Caputre:
The typo in Capture is still there. I couldn’t find it in the code below
either. Is it missing?
> Signal : Lock
> Width : 1920
> Height : 1080
> FRC : 60
>
> Performance:
> Frame# : 3804
> Frame Duration(ms) :
> Now : 22
> Min : 22
> Max : 22
> FPS : 45
>
> Signed-off-by: Jammy Huang <jammy_huang@...eedtech.com>
Kind regards,
Paul
> ---
> v4:
> - use void as aspeed_video_debugfs_create()'s return type
> - update commit message
> v3:
> - let struct, aspeed_video_debugfs_ops, be const
> v2:
> - Change the style of debugfs information
> - Use Min/Max to remove test and branch cases
> ---
> drivers/media/platform/aspeed-video.c | 93 +++++++++++++++++++++++++++
> 1 file changed, 93 insertions(+)
>
> diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
> index 8b3939b8052d..de84e30372eb 100644
> --- a/drivers/media/platform/aspeed-video.c
> +++ b/drivers/media/platform/aspeed-video.c
> @@ -21,6 +21,8 @@
> #include <linux/videodev2.h>
> #include <linux/wait.h>
> #include <linux/workqueue.h>
> +#include <linux/debugfs.h>
> +#include <linux/ktime.h>
> #include <media/v4l2-ctrls.h>
> #include <media/v4l2-dev.h>
> #include <media/v4l2-device.h>
> @@ -203,6 +205,14 @@ struct aspeed_video_buffer {
> struct list_head link;
> };
>
> +struct aspeed_video_perf {
> + ktime_t last_sample;
> + u32 totaltime;
> + u32 duration;
> + u32 duration_min;
> + u32 duration_max;
> +};
> +
> #define to_aspeed_video_buffer(x) \
> container_of((x), struct aspeed_video_buffer, vb)
>
> @@ -241,6 +251,8 @@ struct aspeed_video {
> unsigned int frame_left;
> unsigned int frame_right;
> unsigned int frame_top;
> +
> + struct aspeed_video_perf perf;
> };
>
> #define to_aspeed_video(x) container_of((x), struct aspeed_video, v4l2_dev)
> @@ -444,6 +456,16 @@ static void aspeed_video_write(struct aspeed_video *video, u32 reg, u32 val)
> readl(video->base + reg));
> }
>
> +static void update_perf(struct aspeed_video_perf *p)
> +{
> + p->duration =
> + ktime_to_ms(ktime_sub(ktime_get(), p->last_sample));
> + p->totaltime += p->duration;
> +
> + p->duration_max = max(p->duration, p->duration_max);
> + p->duration_min = min(p->duration, p->duration_min);
> +}
> +
> static int aspeed_video_start_frame(struct aspeed_video *video)
> {
> dma_addr_t addr;
> @@ -482,6 +504,8 @@ static int aspeed_video_start_frame(struct aspeed_video *video)
> aspeed_video_update(video, VE_INTERRUPT_CTRL, 0,
> VE_INTERRUPT_COMP_COMPLETE);
>
> + video->perf.last_sample = ktime_get();
> +
> aspeed_video_update(video, VE_SEQ_CTRL, 0,
> VE_SEQ_CTRL_TRIG_CAPTURE | VE_SEQ_CTRL_TRIG_COMP);
>
> @@ -600,6 +624,8 @@ static irqreturn_t aspeed_video_irq(int irq, void *arg)
> u32 frame_size = aspeed_video_read(video,
> VE_JPEG_COMP_SIZE_READ_BACK);
>
> + update_perf(&video->perf);
> +
> spin_lock(&video->lock);
> clear_bit(VIDEO_FRAME_INPRG, &video->flags);
> buf = list_first_entry_or_null(&video->buffers,
> @@ -760,6 +786,7 @@ static void aspeed_video_get_resolution(struct aspeed_video *video)
> det->width = MIN_WIDTH;
> det->height = MIN_HEIGHT;
> video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
> + memset(&video->perf, 0, sizeof(video->perf));
>
> do {
> if (tries) {
> @@ -1450,6 +1477,8 @@ static int aspeed_video_start_streaming(struct vb2_queue *q,
> struct aspeed_video *video = vb2_get_drv_priv(q);
>
> video->sequence = 0;
> + video->perf.duration_max = 0;
> + video->perf.duration_min = 0xffffffff;
>
> rc = aspeed_video_start_frame(video);
> if (rc) {
> @@ -1517,6 +1546,66 @@ static const struct vb2_ops aspeed_video_vb2_ops = {
> .buf_queue = aspeed_video_buf_queue,
> };
>
> +#ifdef CONFIG_DEBUG_FS
> +static int aspeed_video_debugfs_show(struct seq_file *s, void *data)
> +{
> + struct aspeed_video *v = s->private;
> +
> + seq_puts(s, "\n");
> +
> + seq_printf(s, " %-20s:\t%s\n", "Signal",
> + v->v4l2_input_status ? "Unlock" : "Lock");
> + seq_printf(s, " %-20s:\t%d\n", "Width", v->pix_fmt.width);
> + seq_printf(s, " %-20s:\t%d\n", "Height", v->pix_fmt.height);
> + seq_printf(s, " %-20s:\t%d\n", "FRC", v->frame_rate);
> +
> + seq_puts(s, "\n");
> +
> + seq_puts(s, "Performance:\n");
> + seq_printf(s, " %-20s:\t%d\n", "Frame#", v->sequence);
> + seq_printf(s, " %-20s:\n", "Frame Duration(ms)");
> + seq_printf(s, " %-18s:\t%d\n", "Now", v->perf.duration);
> + seq_printf(s, " %-18s:\t%d\n", "Min", v->perf.duration_min);
> + seq_printf(s, " %-18s:\t%d\n", "Max", v->perf.duration_max);
> + seq_printf(s, " %-20s:\t%d\n", "FPS", 1000/(v->perf.totaltime/v->sequence));
> +
> +
> + return 0;
> +}
> +
> +int aspeed_video_proc_open(struct inode *inode, struct file *file)
> +{
> + return single_open(file, aspeed_video_debugfs_show, inode->i_private);
> +}
> +
> +static struct file_operations aspeed_video_debugfs_ops = {
> + .owner = THIS_MODULE,
> + .open = aspeed_video_proc_open,
> + .read = seq_read,
> + .llseek = seq_lseek,
> + .release = single_release,
> +};
> +
> +static struct dentry *debugfs_entry;
> +
> +static void aspeed_video_debugfs_remove(struct aspeed_video *video)
> +{
> + debugfs_remove_recursive(debugfs_entry);
> +}
> +
> +static void aspeed_video_debugfs_create(struct aspeed_video *video)
> +{
> + debugfs_entry = debugfs_create_file(DEVICE_NAME, 0444, NULL, video,
> + &aspeed_video_debugfs_ops);
> +}
> +#else
> +static void aspeed_video_debugfs_remove(struct aspeed_video *video) { }
> +static int aspeed_video_debugfs_create(struct aspeed_video *video)
> +{
> + return 0;
> +}
> +#endif /* CONFIG_DEBUG_FS */
> +
> static int aspeed_video_setup_video(struct aspeed_video *video)
> {
> const u64 mask = ~(BIT(V4L2_JPEG_CHROMA_SUBSAMPLING_444) |
> @@ -1708,6 +1797,8 @@ static int aspeed_video_probe(struct platform_device *pdev)
> return rc;
> }
>
> + aspeed_video_debugfs_create(video);
> +
> return 0;
> }
>
> @@ -1719,6 +1810,8 @@ static int aspeed_video_remove(struct platform_device *pdev)
>
> aspeed_video_off(video);
>
> + aspeed_video_debugfs_remove(video);
> +
> clk_unprepare(video->vclk);
> clk_unprepare(video->eclk);
>
>
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