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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2013-02-24 07:46:47 (GMT)
committerTomasz Stanislawski <t.stanislaws@samsung.com>2013-03-13 09:49:34 (GMT)
commit65586a3b359cfca99b5b3a041968e50f466f25d0 (patch)
treed343877f8cf69e4b0407c9df0f42a8c211121205
parent8fd603a178b0eeed7db63e26991ae7f011506fb9 (diff)
v4l2-drm-example: Factor out page flipping
Factor the common page flip code out to a function. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
-rw-r--r--v4l2-drm-example/dmabuf-sharing.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/v4l2-drm-example/dmabuf-sharing.c b/v4l2-drm-example/dmabuf-sharing.c
index 7156046..6c7abe5 100644
--- a/v4l2-drm-example/dmabuf-sharing.c
+++ b/v4l2-drm-example/dmabuf-sharing.c
@@ -334,6 +334,15 @@ static void drm_init(struct drm_device *dev, const struct v4l2_pix_format *fmt,
BYE_ON(ret, "failed to find valid mode\n");
}
+static void drm_page_flip(struct drm_device *dev, struct buffer *buffer)
+{
+ int ret;
+
+ ret = drmModePageFlip(dev->fd, dev->crtc_id, buffer->fb_handle,
+ DRM_MODE_PAGE_FLIP_EVENT, (void*)(unsigned long)buffer->index);
+ BYE_ON(ret, "drmModePageFlip failed: %s\n", ERRSTR);
+}
+
static void v4l2_init(struct v4l2_device *dev, unsigned int num_buffers)
{
int ret;
@@ -474,9 +483,7 @@ int main(int argc, char *argv[])
BYE_ON(ret, "drmModeSetCrtc failed: %s\n", ERRSTR);
/* Enqueue the first buffer to DRM and all other buffers to V4L2 */
- ret = drmModePageFlip(drm.fd, drm.crtc_id, buffers[0].fb_handle,
- DRM_MODE_PAGE_FLIP_EVENT, 0);
- BYE_ON(ret, "drmModePageFlip failed: %s\n", ERRSTR);
+ drm_page_flip(&drm, &buffers[0]);
for (unsigned int i = 1; i < s.buffer_count; ++i)
v4l2_queue_buffer(&v4l2, &buffers[i]);
@@ -501,12 +508,9 @@ int main(int argc, char *argv[])
struct buffer *buffer;
buffer = v4l2_dequeue_buffer(&v4l2, buffers);
-
- ret = drmModePageFlip(drm.fd, drm.crtc_id, buffer->fb_handle,
- DRM_MODE_PAGE_FLIP_EVENT, (void*)(unsigned long)buffer->index);
- BYE_ON(ret, "drmModePageFlip failed: %s\n", ERRSTR);
-
+ drm_page_flip(&drm, buffer);
}
+
if (fds[1].revents & POLLIN) {
drmEventContext evctx;
memset(&evctx, 0, sizeof evctx);

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