[media] pwc: Make fps runtime configurable through s_parm, drop fps module param

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 82 insertions, 28 deletions

diff --git a/drivers/media/video/pwc/pwc-ctrl.c b/drivers/media/video/pwc/pwc-ctrl.c
index 905d41d90c6..c6dea6bc322 100644
--- a/drivers/media/video/pwc/pwc-ctrl.c
+++ b/drivers/media/video/pwc/pwc-ctrl.c
@@ -194,8 +194,12 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames,
 	  7              /* 30    */
 	};
 
-	if (size < 0 || size > PSZ_CIF || frames < 4 || frames > 25)
+	if (size < 0 || size > PSZ_CIF)
 		return -EINVAL;
+	if (frames < 4)
+		frames = 4;
+	else if (frames > 25)
+		frames = 25;
 	frames = frames2frames[frames];
 	fps = frames2table[frames];
 	pEntry = &Nala_table[size][fps];
@@ -250,11 +254,14 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames,
 	const struct Timon_table_entry *pChoose;
 	int ret, fps;
 
-	if (size >= PSZ_MAX || frames < 5 || frames > 30 ||
-	    *compression < 0 || *compression > 3)
-		return -EINVAL;
-	if (size == PSZ_VGA && frames > 15)
+	if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
 		return -EINVAL;
+	if (frames < 5)
+		frames = 5;
+	else if (size == PSZ_VGA && frames > 15)
+		frames = 15;
+	else if (frames > 30)
+		frames = 30;
 	fps = (frames / 5) - 1;
 
 	/* Find a supported framerate with progressively higher compression */
@@ -283,7 +290,7 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames,
 	memcpy(pdev->cmd_buf, buf, 13);
 
 	/* Set various parameters */
-	pdev->vframes = frames;
+	pdev->vframes = (fps + 1) * 5;
 	pdev->valternate = pChoose->alternate;
 	pdev->width  = pwc_image_sizes[size][0];
 	pdev->height = pwc_image_sizes[size][1];
@@ -303,11 +310,14 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames,
 	int fps, ret;
 	unsigned char buf[12];
 
-	if (size >= PSZ_MAX || frames < 5 || frames > 30 ||
-	    *compression < 0 || *compression > 3)
-		return -EINVAL;
-	if (size == PSZ_VGA && frames > 15)
+	if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
 		return -EINVAL;
+	if (frames < 5)
+		frames = 5;
+	else if (size == PSZ_VGA && frames > 15)
+		frames = 15;
+	else if (frames > 30)
+		frames = 30;
 	fps = (frames / 5) - 1;
 
 	/* Find a supported framerate with progressively higher compression */
@@ -339,7 +349,7 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames,
 	pdev->cmd_len = 12;
 	memcpy(pdev->cmd_buf, buf, 12);
 	/* All set and go */
-	pdev->vframes = frames;
+	pdev->vframes = (fps + 1) * 5;
 	pdev->valternate = pChoose->alternate;
 	pdev->width  = pwc_image_sizes[size][0];
 	pdev->height = pwc_image_sizes[size][1];
diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c
index 943d37ad0d3..5592068b2f9 100644
--- a/drivers/media/video/pwc/pwc-if.c
+++ b/drivers/media/video/pwc/pwc-if.c
@@ -128,7 +128,6 @@ static struct usb_driver pwc_driver = {
 #define MAX_DEV_HINTS	20
 #define MAX_ISOC_ERRORS	20
 
-static int default_fps = 10;
 #ifdef CONFIG_USB_PWC_DEBUG
 	int pwc_trace = PWC_DEBUG_LEVEL;
 #endif
@@ -1076,7 +1075,6 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
 		return -ENOMEM;
 	}
 	pdev->type = type_id;
-	pdev->vframes = default_fps;
 	pdev->features = features;
 	pwc_construct(pdev); /* set min/max sizes correct */
 
@@ -1138,8 +1136,7 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
 	pwc_set_leds(pdev, 0, 0);
 
 	/* Setup intial videomode */
-	rc = pwc_set_video_mode(pdev, MAX_WIDTH, MAX_HEIGHT, pdev->vframes,
-				&compression);
+	rc = pwc_set_video_mode(pdev, MAX_WIDTH, MAX_HEIGHT, 30, &compression);
 	if (rc)
 		goto err_free_mem;
 
@@ -1243,13 +1240,11 @@ static void usb_pwc_disconnect(struct usb_interface *intf)
  * Initialization code & module stuff
  */
 
-static int fps;
 static int leds[2] = { -1, -1 };
 static unsigned int leds_nargs;
 static char *dev_hint[MAX_DEV_HINTS];
 static unsigned int dev_hint_nargs;
 
-module_param(fps, int, 0444);
 #ifdef CONFIG_USB_PWC_DEBUG
 module_param_named(trace, pwc_trace, int, 0644);
 #endif
@@ -1257,7 +1252,6 @@ module_param(power_save, int, 0644);
 module_param_array(leds, int, &leds_nargs, 0444);
 module_param_array(dev_hint, charp, &dev_hint_nargs, 0444);
 
-MODULE_PARM_DESC(fps, "Initial frames per second. Varies with model, useful range 5-30");
 #ifdef CONFIG_USB_PWC_DEBUG
 MODULE_PARM_DESC(trace, "For debugging purposes");
 #endif
@@ -1286,15 +1280,6 @@ static int __init usb_pwc_init(void)
 	}
 #endif
 
-	if (fps) {
-		if (fps < 4 || fps > 30) {
-			PWC_ERROR("Framerate out of bounds (4-30).\n");
-			return -EINVAL;
-		}
-		default_fps = fps;
-		PWC_DEBUG_MODULE("Default framerate set to %d.\n", default_fps);
-	}
-
 	if (leds[0] >= 0)
 		led_on = leds[0];
 	if (leds[1] >= 0)
diff --git a/drivers/media/video/pwc/pwc-v4l.c b/drivers/media/video/pwc/pwc-v4l.c
index 80e25842e84..ef422d0ac59 100644
--- a/drivers/media/video/pwc/pwc-v4l.c
+++ b/drivers/media/video/pwc/pwc-v4l.c
@@ -493,7 +493,7 @@ static int pwc_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 			(pixelformat>>24)&255);
 
 	ret = pwc_set_video_mode(pdev, f->fmt.pix.width, f->fmt.pix.height,
-				 pdev->vframes, &compression);
+				 30, &compression);
 
 	PWC_DEBUG_IOCTL("pwc_set_video_mode(), return=%d\n", ret);
 
@@ -1094,6 +1094,63 @@ static int pwc_enum_frameintervals(struct file *file, void *fh,
 	return 0;
 }
 
+static int pwc_g_parm(struct file *file, void *fh,
+		      struct v4l2_streamparm *parm)
+{
+	struct pwc_device *pdev = video_drvdata(file);
+
+	if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	memset(parm, 0, sizeof(*parm));
+
+	parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	parm->parm.capture.readbuffers = MIN_FRAMES;
+	parm->parm.capture.capability |= V4L2_CAP_TIMEPERFRAME;
+	parm->parm.capture.timeperframe.denominator = pdev->vframes;
+	parm->parm.capture.timeperframe.numerator = 1;
+
+	return 0;
+}
+
+static int pwc_s_parm(struct file *file, void *fh,
+		      struct v4l2_streamparm *parm)
+{
+	struct pwc_device *pdev = video_drvdata(file);
+	int compression = 0;
+	int ret, fps;
+
+	if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+	    parm->parm.capture.timeperframe.numerator == 0)
+		return -EINVAL;
+
+	if (pwc_test_n_set_capt_file(pdev, file))
+		return -EBUSY;
+
+	fps = parm->parm.capture.timeperframe.denominator /
+	      parm->parm.capture.timeperframe.numerator;
+
+	mutex_lock(&pdev->udevlock);
+	if (!pdev->udev) {
+		ret = -ENODEV;
+		goto leave;
+	}
+
+	if (pdev->iso_init) {
+		ret = -EBUSY;
+		goto leave;
+	}
+
+	ret = pwc_set_video_mode(pdev, pdev->width, pdev->height, fps,
+				 &compression);
+
+	pwc_g_parm(file, fh, parm);
+
+leave:
+	mutex_unlock(&pdev->udevlock);
+	return ret;
+}
+
 static int pwc_log_status(struct file *file, void *priv)
 {
 	struct pwc_device *pdev = video_drvdata(file);
@@ -1120,4 +1177,6 @@ const struct v4l2_ioctl_ops pwc_ioctl_ops = {
 	.vidioc_log_status		    = pwc_log_status,
 	.vidioc_enum_framesizes		    = pwc_enum_framesizes,
 	.vidioc_enum_frameintervals	    = pwc_enum_frameintervals,
+	.vidioc_g_parm			    = pwc_g_parm,
+	.vidioc_s_parm			    = pwc_s_parm,
 };