Author: hselasky
Date: Sat Mar 7 20:49:32 2015
New Revision: 279753
URL: https://svnweb.freebsd.org/changeset/base/279753
Log:
Allow the UDL screen refresh rate to be runtime configurable through a
sysctl. Increase the default frame rate to 25 FPS. Add a comment about
memory constraints.
Modified:
head/sys/dev/usb/video/udl.c
Modified: head/sys/dev/usb/video/udl.c
==============================================================================
--- head/sys/dev/usb/video/udl.c Sat Mar 7 20:45:15 2015
(r279752)
+++ head/sys/dev/usb/video/udl.c Sat Mar 7 20:49:32 2015
(r279753)
@@ -60,15 +60,22 @@
#define USB_DEBUG_VAR udl_debug
#include <dev/usb/usb_debug.h>
+static SYSCTL_NODE(_hw_usb, OID_AUTO, udl, CTLFLAG_RW, 0, "USB UDL");
+
#ifdef USB_DEBUG
static int udl_debug = 0;
-static SYSCTL_NODE(_hw_usb, OID_AUTO, udl, CTLFLAG_RW, 0, "USB UDL");
-
SYSCTL_INT(_hw_usb_udl, OID_AUTO, debug, CTLFLAG_RWTUN,
&udl_debug, 0, "Debug level");
#endif
+#define UDL_FPS_MAX 60
+#define UDL_FPS_MIN 1
+
+static int udl_fps = 25;
+SYSCTL_INT(_hw_usb_udl, OID_AUTO, fps, CTLFLAG_RWTUN,
+ &udl_fps, 0, "Frames Per Second, 1-60");
+
/*
* Prototypes.
*/
@@ -206,14 +213,25 @@ udl_callout(void *arg)
{
struct udl_softc *sc = arg;
const uint32_t max = udl_get_fb_size(sc);
+ int fps;
if (sc->sc_power_save == 0) {
+ fps = udl_fps;
+
+ /* figure out number of frames per second */
+ if (fps < UDL_FPS_MIN)
+ fps = UDL_FPS_MIN;
+ else if (fps > UDL_FPS_MAX)
+ fps = UDL_FPS_MAX;
+
if (sc->sc_sync_off >= max)
sc->sc_sync_off = 0;
usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_0]);
usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
+ } else {
+ fps = 1;
}
- callout_reset(&sc->sc_callout, hz / 5, &udl_callout, sc);
+ callout_reset(&sc->sc_callout, hz / fps, &udl_callout, sc);
}
static int
@@ -765,6 +783,10 @@ udl_fbmem_alloc(struct udl_softc *sc)
size = udl_get_fb_size(sc);
size = round_page(size);
+ /*
+ * It is assumed that allocations above PAGE_SIZE bytes will
+ * be PAGE_SIZE aligned for use with mmap()
+ */
sc->sc_fb_addr = malloc(size, M_DEVBUF, M_WAITOK | M_ZERO);
sc->sc_fb_copy = malloc(size, M_DEVBUF, M_WAITOK | M_ZERO);
sc->sc_fb_size = size;
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "[email protected]"
