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[PATCHv2,2/4] add frame size/frame rate query functions

Message ID 1432555456-20292-3-git-send-email-floe@butterbrot.org (mailing list archive)
State New, archived
Headers show

Commit Message

Florian Echtler May 25, 2015, 12:04 p.m. UTC 
Add missing functions to query the single fixed frame size (960x540) and
supported frame rates. Technically, the SUR40 supports any arbitrary frame
rate up to 60 FPS, as it is polled and not interrupt-driven. For now, we
just report 30 and 60 FPS, which is sufficient to make most V4L2 tools work.

Signed-off-by: Martin Kaltenbrunner <modin@yuri.at>
Signed-off-by: Florian Echtler <floe@butterbrot.org>
---
 drivers/input/touchscreen/sur40.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
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Patch

diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index e707b8d..d860d05 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -778,6 +778,33 @@  static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
 	return 0;
 }
 
+static int sur40_vidioc_enum_framesizes(struct file *file, void *priv,
+					struct v4l2_frmsizeenum *f)
+{
+	if ((f->index != 0) || (f->pixel_format != V4L2_PIX_FMT_GREY))
+		return -EINVAL;
+
+	f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	f->discrete.width  = sur40_video_format.width;
+	f->discrete.height = sur40_video_format.height;
+	return 0;
+}
+
+static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv,
+					    struct v4l2_frmivalenum *f)
+{
+	if ((f->index > 1) || (f->pixel_format != V4L2_PIX_FMT_GREY)
+		|| (f->width  != sur40_video_format.width)
+		|| (f->height != sur40_video_format.height))
+			return -EINVAL;
+
+	f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+	f->discrete.denominator  = 60/(f->index+1);
+	f->discrete.numerator = 1;
+	return 0;
+}
+
+
 static const struct usb_device_id sur40_table[] = {
 	{ USB_DEVICE(ID_MICROSOFT, ID_SUR40) },  /* Samsung SUR40 */
 	{ }                                      /* terminating null entry */
@@ -829,6 +856,9 @@  static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
 	.vidioc_s_fmt_vid_cap	= sur40_vidioc_fmt,
 	.vidioc_g_fmt_vid_cap	= sur40_vidioc_fmt,
 
+	.vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
+	.vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
+
 	.vidioc_enum_input	= sur40_vidioc_enum_input,
 	.vidioc_g_input		= sur40_vidioc_g_input,
 	.vidioc_s_input		= sur40_vidioc_s_input,