V4L/DVB (4375): Eliminate hardcoded limits in VIDIOC_[S|TRY]_FMT for pvrusb2

The pvrusb2 implementation for VIDIOC_[S|TRY]_FMT was hardcoding
limits on the range for allowed resolution, but it would be much
better if we instead just queried the internal control for these
values.  This then opens the door for the driver to adjust these
limits based on the detected hardware.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
index 0caf70b8c0de94ca873e760a56c8224085f5ed74..5f5438aca136cf46b7ce15cd44001cbed6fca626 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
@@ -459,18 +459,26 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
                ret = 0;
                switch(vf->type) {
                case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
+                       int lmin,lmax;
+                       struct pvr2_ctrl *hcp,*vcp;
                        int h = vf->fmt.pix.height;
                        int w = vf->fmt.pix.width;
-
-                       if (h < 200) {
-                               h = 200;
-                       } else if (h > 625) {
-                               h = 625;
+                       hcp = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_HRES);
+                       vcp = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_VRES);
+
+                       lmin = pvr2_ctrl_get_min(hcp);
+                       lmax = pvr2_ctrl_get_max(hcp);
+                       if (h < lmin) {
+                               h = lmin;
+                       } else if (h > lmax) {
+                               h = lmax;
                        }
-                       if (w < 320) {
-                               w = 320;
-                       } else if (w > 720) {
-                               w = 720;
+                       lmin = pvr2_ctrl_get_min(vcp);
+                       lmax = pvr2_ctrl_get_max(vcp);
+                       if (w < lmin) {
+                               w = lmin;
+                       } else if (w > lmax) {
+                               w = lmax;
                        }
 
                        memcpy(vf, &pvr_format[PVR_FORMAT_PIX],
@@ -479,14 +487,8 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
                        vf->fmt.pix.height = h;
 
                        if (cmd == VIDIOC_S_FMT) {
-                               pvr2_ctrl_set_value(
-                                       pvr2_hdw_get_ctrl_by_id(hdw,
-                                                               PVR2_CID_HRES),
-                                       vf->fmt.pix.width);
-                               pvr2_ctrl_set_value(
-                                       pvr2_hdw_get_ctrl_by_id(hdw,
-                                                               PVR2_CID_VRES),
-                                       vf->fmt.pix.height);
+                               pvr2_ctrl_set_value(hcp,vf->fmt.pix.width);
+                               pvr2_ctrl_set_value(vcp,vf->fmt.pix.height);
                        }
                } break;
                case V4L2_BUF_TYPE_VBI_CAPTURE: