Staging: udlfb: Add functions to expose sysfs metrics and controls
Add sysfs controls for edid and performance metrics
There are 8 new files exposed in /sys/class/graphics/fb*
edid - returns 128 byte edid blog, suitable for parsing with parse-edid
metrics_bytes_identical
metrics_bytes_rendered
metrics_bytes_sent
metrics_cpu_kcycles_used
metrics_misc
and metrics_reset, which resets all perf metrics to zero
The 6 perf metrics are of type atomic_t.
So these metrics return precise results for short benchmarks, but
any test approx a minute or longer runtime may roll over.
Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/udlfb/udlfb.h b/drivers/staging/udlfb/udlfb.h
index 13f992f..ef343a6 100644
--- a/drivers/staging/udlfb/udlfb.h
+++ b/drivers/staging/udlfb/udlfb.h
@@ -33,8 +33,12 @@
char *bufend;
char *backing_buffer;
struct mutex bulk_mutex;
+ int fb_count;
+ atomic_t usb_active; /* 0 = update virtual buffer, but no usb traffic */
atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
+ atomic_t use_defio; /* 0 = rely on ioctls and blit/copy/fill rects */
char edid[128];
+ int sku_pixel_limit;
int screen_size;
int line_length;
struct completion done;
@@ -43,6 +47,17 @@
int base8;
int base8d;
u32 pseudo_palette[256];
+ /* blit-only rendering path metrics, exposed through sysfs */
+ atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
+ atomic_t bytes_identical; /* saved effort with backbuffer comparison */
+ atomic_t bytes_sent; /* to usb, after compression including overhead */
+ atomic_t cpu_kcycles_used; /* transpired during pixel processing */
+ /* interface usage metrics. Clients can call driver via several */
+ atomic_t blit_count;
+ atomic_t copy_count;
+ atomic_t fill_count;
+ atomic_t damage_count;
+ atomic_t defio_fault_count;
};
#define NR_USB_REQUEST_I2C_SUB_IO 0x02
@@ -99,6 +114,9 @@
#define dlfb_set_register insert_command
+/* remove once this gets added to sysfs.h */
+#define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store)
+
#define dl_err(format, arg...) \
dev_err(dev->gdev, "dlfb: " format, ## arg)
#define dl_warn(format, arg...) \
