[media] v4l2-ioctl: add priority handling support

Drivers that use v4l2_fh can now use the core framework support of g/s_priority.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

9 files changed, 72 insertions, 15 deletions

diff --git a/drivers/media/radio/radio-si4713.c b/drivers/media/radio/radio-si4713.c
index 726d367ad8d..444b4cf7e65 100644
--- a/drivers/media/radio/radio-si4713.c
+++ b/drivers/media/radio/radio-si4713.c
@@ -224,7 +224,8 @@ static int radio_si4713_s_frequency(struct file *file, void *p,
                                                         s_frequency, vf);
 }
 
-static long radio_si4713_default(struct file *file, void *p, int cmd, void *arg)
+static long radio_si4713_default(struct file *file, void *p,
+                                bool valid_prio, int cmd, void *arg)
 {
         return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
                                                         ioctl, cmd, arg);
diff --git a/drivers/media/video/cpia2/cpia2_v4l.c b/drivers/media/video/cpia2/cpia2_v4l.c
index 363fe098b74..5111bbcefad 100644
--- a/drivers/media/video/cpia2/cpia2_v4l.c
+++ b/drivers/media/video/cpia2/cpia2_v4l.c
@@ -395,7 +395,8 @@ static int sync(struct camera_data *cam, int frame_nr)
  *
  *****************************************************************************/
 
-static long cpia2_default(struct file *file, void *fh, int cmd, void *arg)
+static long cpia2_default(struct file *file, void *fh, bool valid_prio,
+                          int cmd, void *arg)
 {
         struct camera_data *cam = video_drvdata(file);
         __u32 gpio_val;
diff --git a/drivers/media/video/cx18/cx18-ioctl.c b/drivers/media/video/cx18/cx18-ioctl.c
index 36b018c943e..08ed75de191 100644
--- a/drivers/media/video/cx18/cx18-ioctl.c
+++ b/drivers/media/video/cx18/cx18-ioctl.c
@@ -1057,7 +1057,8 @@ static int cx18_log_status(struct file *file, void *fh)
         return 0;
 }
 
-static long cx18_default(struct file *file, void *fh, int cmd, void *arg)
+static long cx18_default(struct file *file, void *fh, bool valid_prio,
+                                                        int cmd, void *arg)
 {
         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
 
diff --git a/drivers/media/video/davinci/vpfe_capture.c b/drivers/media/video/davinci/vpfe_capture.c
index 353eadaa823..71e961e53a5 100644
--- a/drivers/media/video/davinci/vpfe_capture.c
+++ b/drivers/media/video/davinci/vpfe_capture.c
@@ -1719,7 +1719,7 @@ unlock_out:
 
 
 static long vpfe_param_handler(struct file *file, void *priv,
-                int cmd, void *param)
+                bool valid_prio, int cmd, void *param)
 {
         struct vpfe_device *vpfe_dev = video_drvdata(file);
         int ret = 0;
diff --git a/drivers/media/video/ivtv/ivtv-ioctl.c b/drivers/media/video/ivtv/ivtv-ioctl.c
index b686da5e432..d34a326c0ef 100644
--- a/drivers/media/video/ivtv/ivtv-ioctl.c
+++ b/drivers/media/video/ivtv/ivtv-ioctl.c
@@ -1795,7 +1795,8 @@ static int ivtv_decoder_ioctls(struct file *filp, unsigned int cmd, void *arg)
         return 0;
 }
 
-static long ivtv_default(struct file *file, void *fh, int cmd, void *arg)
+static long ivtv_default(struct file *file, void *fh, bool valid_prio,
+                         int cmd, void *arg)
 {
         struct ivtv *itv = ((struct ivtv_open_id *)fh)->itv;
 
diff --git a/drivers/media/video/meye.c b/drivers/media/video/meye.c
index 48d2c2419c1..b09a3c80a15 100644
--- a/drivers/media/video/meye.c
+++ b/drivers/media/video/meye.c
@@ -1547,7 +1547,8 @@ static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i)
         return 0;
 }
 
-static long vidioc_default(struct file *file, void *fh, int cmd, void *arg)
+static long vidioc_default(struct file *file, void *fh, bool valid_prio,
+                                                int cmd, void *arg)
 {
         switch (cmd) {
         case MEYEIOC_G_PARAMS:
diff --git a/drivers/media/video/mxb.c b/drivers/media/video/mxb.c
index e8846a09b02..0b385002350 100644
--- a/drivers/media/video/mxb.c
+++ b/drivers/media/video/mxb.c
@@ -643,7 +643,8 @@ static int vidioc_s_register(struct file *file, void *fh, struct v4l2_dbg_regist
 }
 #endif
 
-static long vidioc_default(struct file *file, void *fh, int cmd, void *arg)
+static long vidioc_default(struct file *file, void *fh, bool valid_prio,
+                                                        int cmd, void *arg)
 {
         struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
         struct mxb *mxb = (struct mxb *)dev->ext_priv;
diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c
index 68a5313a52d..aa87e462a95 100644
--- a/drivers/media/video/pwc/pwc-v4l.c
+++ b/drivers/media/video/pwc/pwc-v4l.c
@@ -860,7 +860,8 @@ static int pwc_enum_frameintervals(struct file *file, void *fh,
         return 0;
 }
 
-static long pwc_default(struct file *file, void *fh, int cmd, void *arg)
+static long pwc_default(struct file *file, void *fh, bool valid_prio,
+                        int cmd, void *arg)
 {
         struct pwc_device *pdev = video_drvdata(file);
 
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index db6ec386834..3e6b6fa5771 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -24,6 +24,7 @@
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-fh.h>
 #include <media/v4l2-event.h>
+#include <media/v4l2-device.h>
 #include <media/v4l2-chip-ident.h>
 
 #define dbgarg(cmd, fmt, arg...) \
@@ -538,6 +539,7 @@ static long __video_do_ioctl(struct file *file,
         struct video_device *vfd = video_devdata(file);
         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
         void *fh = file->private_data;
+        struct v4l2_fh *vfh = NULL;
         struct v4l2_format f_copy;
         long ret = -EINVAL;
 
@@ -553,6 +555,43 @@ static long __video_do_ioctl(struct file *file,
                 printk(KERN_CONT "\n");
         }
 
+        if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
+                vfh = file->private_data;
+
+        if (vfh && !ops->vidioc_s_priority) {
+                switch (cmd) {
+                case VIDIOC_S_CTRL:
+                case VIDIOC_S_STD:
+                case VIDIOC_S_INPUT:
+                case VIDIOC_S_OUTPUT:
+                case VIDIOC_S_TUNER:
+                case VIDIOC_S_FREQUENCY:
+                case VIDIOC_S_FMT:
+                case VIDIOC_S_CROP:
+                case VIDIOC_S_AUDIO:
+                case VIDIOC_S_AUDOUT:
+                case VIDIOC_S_EXT_CTRLS:
+                case VIDIOC_S_FBUF:
+                case VIDIOC_S_PRIORITY:
+                case VIDIOC_S_DV_PRESET:
+                case VIDIOC_S_DV_TIMINGS:
+                case VIDIOC_S_JPEGCOMP:
+                case VIDIOC_S_MODULATOR:
+                case VIDIOC_S_PARM:
+                case VIDIOC_S_HW_FREQ_SEEK:
+                case VIDIOC_ENCODER_CMD:
+                case VIDIOC_OVERLAY:
+                case VIDIOC_REQBUFS:
+                case VIDIOC_STREAMON:
+                case VIDIOC_STREAMOFF:
+                        ret = v4l2_prio_check(vfd->prio, vfh->prio);
+                        if (ret)
+                                goto exit_prio;
+                        ret = -EINVAL;
+                        break;
+                }
+        }
+
         switch (cmd) {
 
         /* --- capabilities ------------------------------------------ */
@@ -579,9 +618,12 @@ static long __video_do_ioctl(struct file *file,
         {
                 enum v4l2_priority *p = arg;
 
-                if (!ops->vidioc_g_priority)
-                        break;
-                ret = ops->vidioc_g_priority(file, fh, p);
+                if (ops->vidioc_g_priority) {
+                        ret = ops->vidioc_g_priority(file, fh, p);
+                } else if (vfh) {
+                        *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
+                        ret = 0;
+                }
                 if (!ret)
                         dbgarg(cmd, "priority is %d\n", *p);
                 break;
@@ -590,10 +632,13 @@ static long __video_do_ioctl(struct file *file,
         {
                 enum v4l2_priority *p = arg;
 
-                if (!ops->vidioc_s_priority)
-                        break;
+                if (!ops->vidioc_s_priority && vfh == NULL)
+                                break;
                 dbgarg(cmd, "setting priority to %d\n", *p);
-                ret = ops->vidioc_s_priority(file, fh, *p);
+                if (ops->vidioc_s_priority)
+                        ret = ops->vidioc_s_priority(file, fh, *p);
+                else
+                        ret = v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
                 break;
         }
 
@@ -2138,13 +2183,18 @@ static long __video_do_ioctl(struct file *file,
         }
         default:
         {
+                bool valid_prio = true;
+
                 if (!ops->vidioc_default)
                         break;
-                ret = ops->vidioc_default(file, fh, cmd, arg);
+                if (vfh && !ops->vidioc_s_priority)
+                        valid_prio = v4l2_prio_check(vfd->prio, vfh->prio) >= 0;
+                ret = ops->vidioc_default(file, fh, valid_prio, cmd, arg);
                 break;
         }
         } /* switch */
 
+exit_prio:
         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
                 if (ret < 0) {
                         v4l_print_ioctl(vfd->name, cmd);