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Message-ID: <20211028034332.15961-1-jammy_huang@aspeedtech.com>
Date: Thu, 28 Oct 2021 11:43:32 +0800
From: Jammy Huang <jammy_huang@...eedtech.com>
To: <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: [PATCH v7] media: aspeed: add debugfs
A debugfs file, /sys/kernel/debug/aspeed-video, will be created. You can
read it to get video real-time information as below:
Capture:
Signal : Lock
Width : 1920
Height : 1080
FRC : 60
Performance:
Frame# : 38
Frame Duration(ms) :
Now : 21
Min : 21
Max : 21
FPS : 47
Signed-off-by: Jammy Huang <jammy_huang@...eedtech.com>
---
v7:
- avoid divide-by-zero
v6:
- update commit message
v5:
- correct log
- update commit message
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 | 96 +++++++++++++++++++++++++++
1 file changed, 96 insertions(+)
diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
index 8b3939b8052d..5ffbabf884eb 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 +1546,69 @@ 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_puts(s, "Capture:\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",
+ (v->perf.totaltime && v->sequence) ?
+ 1000/(v->perf.totaltime/v->sequence) : 0);
+
+
+ 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 const 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 +1800,8 @@ static int aspeed_video_probe(struct platform_device *pdev)
return rc;
}
+ aspeed_video_debugfs_create(video);
+
return 0;
}
@@ -1719,6 +1813,8 @@ 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);
--
2.25.1
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