From 22fef46503bd929ef663255285c9aa7c6a4dd93f Mon Sep 17 00:00:00 2001
From: 6by9 <6by9@users.noreply.github.com>
Date: Fri, 8 Apr 2016 18:15:43 +0100
Subject: [PATCH] V4L2 driver updates (#1393)

* BCM2835-V4L2: Correct ISO control and add V4L2_CID_ISO_SENSITIVITY_AUTO

https://github.com/raspberrypi/linux/issues/1251

V4L2_CID_ISO_SENSITIVITY was not advertising ISO*1000 as it should.
V4L2_CID_ISO_SENSITIVITY_AUTO was not implemented, so was taking
V4L2_CID_ISO_SENSITIVITY as 0 for auto mode.
Still accepts 0 for auto, but also abides by the new parameter.

Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com>

* BCM2835-V4L2: Add a video_nr parameter.

Adds a kernel parameter "video_nr" to specify the preferred
/dev/videoX device node.
https://www.raspberrypi.org/forums/viewtopic.php?f=38&t=136120&p=905545

Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com>

* BCM2835-V4L2: Add support for multiple cameras

Ask GPU on load how many cameras have been detected, and
enumerate that number of devices.
Only applicable on the Compute Module as no other device
exposes multiple CSI2 interfaces.

Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com>

* BCM2835-V4L2: Add control of the overlay location and alpha.

Actually do something useful in vidioc_s_fmt_vid_overlay and
vidioc_try_fmt_vid_overlay, rather than effectively having
read-only fields.

Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com>

* BCM2835-V4L2: V4L2-Compliance failure fix

VIDIOC_TRY_FMT was failing due to bytesperline not
being set correctly by default.

Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com>

* BCM2835-V4L2: Make all module parameters static

Clean up to correct variable scope

Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com>
---
 drivers/media/platform/bcm2835/bcm2835-camera.c  | 372 +++++++++++++++--------
 drivers/media/platform/bcm2835/bcm2835-camera.h  |  19 +-
 drivers/media/platform/bcm2835/controls.c        |  31 +-
 drivers/media/platform/bcm2835/mmal-parameters.h |  33 ++
 4 files changed, 320 insertions(+), 135 deletions(-)

--- a/drivers/media/platform/bcm2835/bcm2835-camera.c
+++ b/drivers/media/platform/bcm2835/bcm2835-camera.c
@@ -45,6 +45,8 @@
 #define MAX_VIDEO_MODE_WIDTH 1280
 #define MAX_VIDEO_MODE_HEIGHT 720
 
+#define MAX_BCM2835_CAMERAS 2
+
 MODULE_DESCRIPTION("Broadcom 2835 MMAL video capture");
 MODULE_AUTHOR("Vincent Sanders");
 MODULE_LICENSE("GPL");
@@ -54,8 +56,13 @@ int bcm2835_v4l2_debug;
 module_param_named(debug, bcm2835_v4l2_debug, int, 0644);
 MODULE_PARM_DESC(bcm2835_v4l2_debug, "Debug level 0-2");
 
-int max_video_width = MAX_VIDEO_MODE_WIDTH;
-int max_video_height = MAX_VIDEO_MODE_HEIGHT;
+#define UNSET (-1)
+static int video_nr[] = {[0 ... (MAX_BCM2835_CAMERAS - 1)] = UNSET };
+module_param_array(video_nr, int, NULL, 0644);
+MODULE_PARM_DESC(video_nr, "videoX start numbers, -1 is autodetect");
+
+static int max_video_width = MAX_VIDEO_MODE_WIDTH;
+static int max_video_height = MAX_VIDEO_MODE_HEIGHT;
 module_param(max_video_width, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
 MODULE_PARM_DESC(max_video_width, "Threshold for video mode");
 module_param(max_video_height, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
@@ -70,11 +77,12 @@ MODULE_PARM_DESC(max_video_height, "Thre
  * our function table list (actually switch to an alternate set, but same
  * result).
  */
-int gst_v4l2src_is_broken = 0;
+static int gst_v4l2src_is_broken;
 module_param(gst_v4l2src_is_broken, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
 MODULE_PARM_DESC(gst_v4l2src_is_broken, "If non-zero, enable workaround for Gstreamer");
 
-static struct bm2835_mmal_dev *gdev;	/* global device data */
+/* global device data array */
+static struct bm2835_mmal_dev *gdev[MAX_BCM2835_CAMERAS];
 
 #define FPS_MIN 1
 #define FPS_MAX 90
@@ -413,6 +421,17 @@ static int enable_camera(struct bm2835_m
 {
 	int ret;
 	if (!dev->camera_use_count) {
+		ret = vchiq_mmal_port_parameter_set(
+			dev->instance,
+			&dev->component[MMAL_COMPONENT_CAMERA]->control,
+			MMAL_PARAMETER_CAMERA_NUM, &dev->camera_num,
+			sizeof(dev->camera_num));
+		if (ret < 0) {
+			v4l2_err(&dev->v4l2_dev,
+				 "Failed setting camera num, ret %d\n", ret);
+			return -EINVAL;
+		}
+
 		ret = vchiq_mmal_component_enable(
 				dev->instance,
 				dev->component[MMAL_COMPONENT_CAMERA]);
@@ -647,6 +666,30 @@ static struct vb2_ops bm2835_mmal_video_
 	IOCTL operations
    ------------------------------------------------------------------*/
 
+static int set_overlay_params(struct bm2835_mmal_dev *dev,
+			      struct vchiq_mmal_port *port)
+{
+	int ret;
+	struct mmal_parameter_displayregion prev_config = {
+	.set = MMAL_DISPLAY_SET_LAYER | MMAL_DISPLAY_SET_ALPHA |
+	    MMAL_DISPLAY_SET_DEST_RECT | MMAL_DISPLAY_SET_FULLSCREEN,
+	.layer = PREVIEW_LAYER,
+	.alpha = dev->overlay.global_alpha,
+	.fullscreen = 0,
+	.dest_rect = {
+		      .x = dev->overlay.w.left,
+		      .y = dev->overlay.w.top,
+		      .width = dev->overlay.w.width,
+		      .height = dev->overlay.w.height,
+		      },
+	};
+	ret = vchiq_mmal_port_parameter_set(dev->instance, port,
+					    MMAL_PARAMETER_DISPLAYREGION,
+					    &prev_config, sizeof(prev_config));
+
+	return ret;
+}
+
 /* overlay ioctl */
 static int vidioc_enum_fmt_vid_overlay(struct file *file, void *priv,
 				       struct v4l2_fmtdesc *f)
@@ -678,10 +721,31 @@ static int vidioc_g_fmt_vid_overlay(stru
 static int vidioc_try_fmt_vid_overlay(struct file *file, void *priv,
 				      struct v4l2_format *f)
 {
-	/* Only support one format so get the current one. */
-	vidioc_g_fmt_vid_overlay(file, priv, f);
+	struct bm2835_mmal_dev *dev = video_drvdata(file);
 
-	/* todo: allow the size and/or offset to be changed. */
+	f->fmt.win.field = V4L2_FIELD_NONE;
+	f->fmt.win.chromakey = 0;
+	f->fmt.win.clips = NULL;
+	f->fmt.win.clipcount = 0;
+	f->fmt.win.bitmap = NULL;
+
+	v4l_bound_align_image(&f->fmt.win.w.width, MIN_WIDTH, MAX_WIDTH, 1,
+			      &f->fmt.win.w.height, MIN_HEIGHT, MAX_HEIGHT,
+			      1, 0);
+	v4l_bound_align_image(&f->fmt.win.w.left, MIN_WIDTH, MAX_WIDTH, 1,
+			      &f->fmt.win.w.top, MIN_HEIGHT, MAX_HEIGHT,
+			      1, 0);
+
+	v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
+		"Overlay: Now w/h %dx%d l/t %dx%d\n",
+		f->fmt.win.w.width, f->fmt.win.w.height,
+		f->fmt.win.w.left, f->fmt.win.w.top);
+
+	v4l2_dump_win_format(1,
+			     bcm2835_v4l2_debug,
+			     &dev->v4l2_dev,
+			     &f->fmt.win,
+			     __func__);
 	return 0;
 }
 
@@ -693,8 +757,11 @@ static int vidioc_s_fmt_vid_overlay(stru
 	vidioc_try_fmt_vid_overlay(file, priv, f);
 
 	dev->overlay = f->fmt.win;
+	if (dev->component[MMAL_COMPONENT_PREVIEW]->enabled) {
+		set_overlay_params(dev,
+			&dev->component[MMAL_COMPONENT_PREVIEW]->input[0]);
+	}
 
-	/* todo: program the preview port parameters */
 	return 0;
 }
 
@@ -704,20 +771,6 @@ static int vidioc_overlay(struct file *f
 	struct bm2835_mmal_dev *dev = video_drvdata(file);
 	struct vchiq_mmal_port *src;
 	struct vchiq_mmal_port *dst;
-	struct mmal_parameter_displayregion prev_config = {
-		.set = MMAL_DISPLAY_SET_LAYER | MMAL_DISPLAY_SET_ALPHA |
-		    MMAL_DISPLAY_SET_DEST_RECT | MMAL_DISPLAY_SET_FULLSCREEN,
-		.layer = PREVIEW_LAYER,
-		.alpha = 255,
-		.fullscreen = 0,
-		.dest_rect = {
-			      .x = dev->overlay.w.left,
-			      .y = dev->overlay.w.top,
-			      .width = dev->overlay.w.width,
-			      .height = dev->overlay.w.height,
-			      },
-	};
-
 	if ((on && dev->component[MMAL_COMPONENT_PREVIEW]->enabled) ||
 	    (!on && !dev->component[MMAL_COMPONENT_PREVIEW]->enabled))
 		return 0;	/* already in requested state */
@@ -749,9 +802,7 @@ static int vidioc_overlay(struct file *f
 	if (ret < 0)
 		goto error;
 
-	ret = vchiq_mmal_port_parameter_set(dev->instance, dst,
-					    MMAL_PARAMETER_DISPLAYREGION,
-					    &prev_config, sizeof(prev_config));
+	ret = set_overlay_params(dev, dst);
 	if (ret < 0)
 		goto error;
 
@@ -782,6 +833,9 @@ static int vidioc_g_fbuf(struct file *fi
 	struct vchiq_mmal_port *preview_port =
 		    &dev->component[MMAL_COMPONENT_CAMERA]->
 		    output[MMAL_CAMERA_PORT_PREVIEW];
+
+	a->capability = V4L2_FBUF_CAP_EXTERNOVERLAY |
+			V4L2_FBUF_CAP_GLOBAL_ALPHA;
 	a->flags = V4L2_FBUF_FLAG_OVERLAY;
 	a->fmt.width = preview_port->es.video.width;
 	a->fmt.height = preview_port->es.video.height;
@@ -1445,6 +1499,34 @@ static struct video_device vdev_template
 	.release = video_device_release_empty,
 };
 
+static int get_num_cameras(struct vchiq_mmal_instance *instance)
+{
+	int ret;
+	struct vchiq_mmal_component  *cam_info_component;
+	struct mmal_parameter_camera_info_t cam_info = {0};
+	int param_size = sizeof(cam_info);
+
+	/* create a camera_info component */
+	ret = vchiq_mmal_component_init(instance, "camera_info",
+					&cam_info_component);
+	if (ret < 0)
+		/* Unusual failure - let's guess one camera. */
+		return 1;
+
+	if (vchiq_mmal_port_parameter_get(instance,
+					  &cam_info_component->control,
+					  MMAL_PARAMETER_CAMERA_INFO,
+					  &cam_info,
+					  &param_size)) {
+		pr_info("Failed to get camera info\n");
+	}
+
+	vchiq_mmal_component_finalise(instance,
+				      cam_info_component);
+
+	return cam_info.num_cameras;
+}
+
 static int set_camera_parameters(struct vchiq_mmal_instance *instance,
 				 struct vchiq_mmal_component *camera)
 {
@@ -1685,7 +1767,9 @@ static int __init bm2835_mmal_init_devic
 	/* video device needs to be able to access instance data */
 	video_set_drvdata(vfd, dev);
 
-	ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
+	ret = video_register_device(vfd,
+				    VFL_TYPE_GRABBER,
+				    video_nr[dev->camera_num]);
 	if (ret < 0)
 		return ret;
 
@@ -1696,10 +1780,52 @@ static int __init bm2835_mmal_init_devic
 	return 0;
 }
 
+void bcm2835_cleanup_instance(struct bm2835_mmal_dev *dev)
+{
+	if (!dev)
+		return;
+
+	v4l2_info(&dev->v4l2_dev, "unregistering %s\n",
+		  video_device_node_name(&dev->vdev));
+
+	video_unregister_device(&dev->vdev);
+
+	if (dev->capture.encode_component) {
+		v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
+			 "mmal_exit - disconnect tunnel\n");
+		vchiq_mmal_port_connect_tunnel(dev->instance,
+					       dev->capture.camera_port, NULL);
+		vchiq_mmal_component_disable(dev->instance,
+					     dev->capture.encode_component);
+	}
+	vchiq_mmal_component_disable(dev->instance,
+				     dev->component[MMAL_COMPONENT_CAMERA]);
+
+	vchiq_mmal_component_finalise(dev->instance,
+				      dev->
+				      component[MMAL_COMPONENT_VIDEO_ENCODE]);
+
+	vchiq_mmal_component_finalise(dev->instance,
+				      dev->
+				      component[MMAL_COMPONENT_IMAGE_ENCODE]);
+
+	vchiq_mmal_component_finalise(dev->instance,
+				      dev->component[MMAL_COMPONENT_PREVIEW]);
+
+	vchiq_mmal_component_finalise(dev->instance,
+				      dev->component[MMAL_COMPONENT_CAMERA]);
+
+	v4l2_ctrl_handler_free(&dev->ctrl_handler);
+
+	v4l2_device_unregister(&dev->v4l2_dev);
+
+	kfree(dev);
+}
+
 static struct v4l2_format default_v4l2_format = {
 	.fmt.pix.pixelformat = V4L2_PIX_FMT_JPEG,
 	.fmt.pix.width = 1024,
-	.fmt.pix.bytesperline = 1024,
+	.fmt.pix.bytesperline = 0,
 	.fmt.pix.height = 768,
 	.fmt.pix.sizeimage = 1024*768,
 };
@@ -1709,76 +1835,93 @@ static int __init bm2835_mmal_init(void)
 	int ret;
 	struct bm2835_mmal_dev *dev;
 	struct vb2_queue *q;
+	int camera;
+	unsigned int num_cameras;
+	struct vchiq_mmal_instance *instance;
 
-	dev = kzalloc(sizeof(*gdev), GFP_KERNEL);
-	if (!dev)
-		return -ENOMEM;
-
-	/* setup device defaults */
-	dev->overlay.w.left = 150;
-	dev->overlay.w.top = 50;
-	dev->overlay.w.width = 1024;
-	dev->overlay.w.height = 768;
-	dev->overlay.clipcount = 0;
-	dev->overlay.field = V4L2_FIELD_NONE;
-
-	dev->capture.fmt = &formats[3]; /* JPEG */
-
-	/* v4l device registration */
-	snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name),
-		 "%s", BM2835_MMAL_MODULE_NAME);
-	ret = v4l2_device_register(NULL, &dev->v4l2_dev);
-	if (ret)
-		goto free_dev;
-
-	/* setup v4l controls */
-	ret = bm2835_mmal_init_controls(dev, &dev->ctrl_handler);
-	if (ret < 0)
-		goto unreg_dev;
-	dev->v4l2_dev.ctrl_handler = &dev->ctrl_handler;
-
-	/* mmal init */
-	ret = mmal_init(dev);
+	ret = vchiq_mmal_init(&instance);
 	if (ret < 0)
-		goto unreg_dev;
+		return ret;
 
-	/* initialize queue */
-	q = &dev->capture.vb_vidq;
-	memset(q, 0, sizeof(*q));
-	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
-	q->drv_priv = dev;
-	q->buf_struct_size = sizeof(struct mmal_buffer);
-	q->ops = &bm2835_mmal_video_qops;
-	q->mem_ops = &vb2_vmalloc_memops;
-	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-	ret = vb2_queue_init(q);
-	if (ret < 0)
-		goto unreg_dev;
+	num_cameras = get_num_cameras(instance);
+	if (num_cameras > MAX_BCM2835_CAMERAS)
+		num_cameras = MAX_BCM2835_CAMERAS;
+
+	for (camera = 0; camera < num_cameras; camera++) {
+		dev = kzalloc(sizeof(struct bm2835_mmal_dev), GFP_KERNEL);
+		if (!dev)
+			return -ENOMEM;
+
+		dev->camera_num = camera;
+
+		/* setup device defaults */
+		dev->overlay.w.left = 150;
+		dev->overlay.w.top = 50;
+		dev->overlay.w.width = 1024;
+		dev->overlay.w.height = 768;
+		dev->overlay.clipcount = 0;
+		dev->overlay.field = V4L2_FIELD_NONE;
+		dev->overlay.global_alpha = 255;
+
+		dev->capture.fmt = &formats[3]; /* JPEG */
+
+		/* v4l device registration */
+		snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name),
+			 "%s", BM2835_MMAL_MODULE_NAME);
+		ret = v4l2_device_register(NULL, &dev->v4l2_dev);
+		if (ret)
+			goto free_dev;
 
-	/* v4l2 core mutex used to protect all fops and v4l2 ioctls. */
-	mutex_init(&dev->mutex);
+		/* setup v4l controls */
+		ret = bm2835_mmal_init_controls(dev, &dev->ctrl_handler);
+		if (ret < 0)
+			goto unreg_dev;
+		dev->v4l2_dev.ctrl_handler = &dev->ctrl_handler;
+
+		/* mmal init */
+		dev->instance = instance;
+		ret = mmal_init(dev);
+		if (ret < 0)
+			goto unreg_dev;
+
+		/* initialize queue */
+		q = &dev->capture.vb_vidq;
+		memset(q, 0, sizeof(*q));
+		q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
+		q->drv_priv = dev;
+		q->buf_struct_size = sizeof(struct mmal_buffer);
+		q->ops = &bm2835_mmal_video_qops;
+		q->mem_ops = &vb2_vmalloc_memops;
+		q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+		ret = vb2_queue_init(q);
+		if (ret < 0)
+			goto unreg_dev;
+
+		/* v4l2 core mutex used to protect all fops and v4l2 ioctls. */
+		mutex_init(&dev->mutex);
+
+		/* initialise video devices */
+		ret = bm2835_mmal_init_device(dev, &dev->vdev);
+		if (ret < 0)
+			goto unreg_dev;
+
+		/* Really want to call vidioc_s_fmt_vid_cap with the default
+		 * format, but currently the APIs don't join up.
+		 */
+		ret = mmal_setup_components(dev, &default_v4l2_format);
+		if (ret < 0) {
+			v4l2_err(&dev->v4l2_dev,
+				 "%s: could not setup components\n", __func__);
+			goto unreg_dev;
+		}
 
-	/* initialise video devices */
-	ret = bm2835_mmal_init_device(dev, &dev->vdev);
-	if (ret < 0)
-		goto unreg_dev;
+		v4l2_info(&dev->v4l2_dev,
+			  "Broadcom 2835 MMAL video capture ver %s loaded.\n",
+			  BM2835_MMAL_VERSION);
 
-	/* Really want to call vidioc_s_fmt_vid_cap with the default
-	 * format, but currently the APIs don't join up.
-	 */
-	ret = mmal_setup_components(dev, &default_v4l2_format);
-	if (ret < 0) {
-		v4l2_err(&dev->v4l2_dev,
-			 "%s: could not setup components\n", __func__);
-		goto unreg_dev;
+		gdev[camera] = dev;
 	}
-
-	v4l2_info(&dev->v4l2_dev,
-		  "Broadcom 2835 MMAL video capture ver %s loaded.\n",
-		  BM2835_MMAL_VERSION);
-
-	gdev = dev;
 	return 0;
 
 unreg_dev:
@@ -1788,8 +1931,11 @@ unreg_dev:
 free_dev:
 	kfree(dev);
 
-	v4l2_err(&dev->v4l2_dev,
-		 "%s: error %d while loading driver\n",
+	for ( ; camera > 0; camera--) {
+		bcm2835_cleanup_instance(gdev[camera]);
+		gdev[camera] = NULL;
+	}
+	pr_info("%s: error %d while loading driver\n",
 		 BM2835_MMAL_MODULE_NAME, ret);
 
 	return ret;
@@ -1797,46 +1943,14 @@ free_dev:
 
 static void __exit bm2835_mmal_exit(void)
 {
-	if (!gdev)
-		return;
-
-	v4l2_info(&gdev->v4l2_dev, "unregistering %s\n",
-		  video_device_node_name(&gdev->vdev));
+	int camera;
+	struct vchiq_mmal_instance *instance = gdev[0]->instance;
 
-	video_unregister_device(&gdev->vdev);
-
-	if (gdev->capture.encode_component) {
-		v4l2_dbg(1, bcm2835_v4l2_debug, &gdev->v4l2_dev,
-			 "mmal_exit - disconnect tunnel\n");
-		vchiq_mmal_port_connect_tunnel(gdev->instance,
-					       gdev->capture.camera_port, NULL);
-		vchiq_mmal_component_disable(gdev->instance,
-					     gdev->capture.encode_component);
+	for (camera = 0; camera < MAX_BCM2835_CAMERAS; camera++) {
+		bcm2835_cleanup_instance(gdev[camera]);
+		gdev[camera] = NULL;
 	}
-	vchiq_mmal_component_disable(gdev->instance,
-				     gdev->component[MMAL_COMPONENT_CAMERA]);
-
-	vchiq_mmal_component_finalise(gdev->instance,
-				      gdev->
-				      component[MMAL_COMPONENT_VIDEO_ENCODE]);
-
-	vchiq_mmal_component_finalise(gdev->instance,
-				      gdev->
-				      component[MMAL_COMPONENT_IMAGE_ENCODE]);
-
-	vchiq_mmal_component_finalise(gdev->instance,
-				      gdev->component[MMAL_COMPONENT_PREVIEW]);
-
-	vchiq_mmal_component_finalise(gdev->instance,
-				      gdev->component[MMAL_COMPONENT_CAMERA]);
-
-	vchiq_mmal_finalise(gdev->instance);
-
-	v4l2_ctrl_handler_free(&gdev->ctrl_handler);
-
-	v4l2_device_unregister(&gdev->v4l2_dev);
-
-	kfree(gdev);
+	vchiq_mmal_finalise(instance);
 }
 
 module_init(bm2835_mmal_init);
--- a/drivers/media/platform/bcm2835/bcm2835-camera.h
+++ b/drivers/media/platform/bcm2835/bcm2835-camera.h
@@ -15,7 +15,7 @@
  * core driver device
  */
 
-#define V4L2_CTRL_COUNT 28 /* number of v4l controls */
+#define V4L2_CTRL_COUNT 29 /* number of v4l controls */
 
 enum {
 	MMAL_COMPONENT_CAMERA = 0,
@@ -58,6 +58,8 @@ struct bm2835_mmal_dev {
 	enum mmal_parameter_exposuremeteringmode metering_mode;
 	unsigned int		  manual_shutter_speed;
 	bool			  exp_auto_priority;
+	bool manual_iso_enabled;
+	uint32_t iso;
 
 	/* allocated mmal instance and components */
 	struct vchiq_mmal_instance   *instance;
@@ -104,6 +106,8 @@ struct bm2835_mmal_dev {
 
 	} capture;
 
+	unsigned int camera_num;
+
 };
 
 int bm2835_mmal_init_controls(
@@ -124,3 +128,16 @@ int set_framerate_params(struct bm2835_m
 		(pix_fmt)->pixelformat, (pix_fmt)->bytesperline,	\
 		(pix_fmt)->sizeimage, (pix_fmt)->colorspace, (pix_fmt)->priv); \
 }
+#define v4l2_dump_win_format(level, debug, dev, win_fmt, desc)	\
+{	\
+	v4l2_dbg(level, debug, dev,	\
+"%s: w %u h %u l %u t %u  field %u chromakey %06X clip %p " \
+"clipcount %u bitmap %p\n", \
+		desc == NULL ? "" : desc,	\
+		(win_fmt)->w.width, (win_fmt)->w.height, \
+		(win_fmt)->w.left, (win_fmt)->w.top, \
+		(win_fmt)->field,	\
+		(win_fmt)->chromakey,	\
+		(win_fmt)->clips, (win_fmt)->clipcount,	\
+		(win_fmt)->bitmap); \
+}
--- a/drivers/media/platform/bcm2835/controls.c
+++ b/drivers/media/platform/bcm2835/controls.c
@@ -49,10 +49,13 @@ static const s64 ev_bias_qmenu[] = {
 	 4000
 };
 
-/* Supported ISO values
+/* Supported ISO values (*1000)
  * ISOO = auto ISO
  */
 static const s64 iso_qmenu[] = {
+	0, 100000, 200000, 400000, 800000,
+};
+static const uint32_t iso_values[] = {
 	0, 100, 200, 400, 800,
 };
 
@@ -201,7 +204,7 @@ static int ctrl_set_value(struct bm2835_
 					     &u32_value, sizeof(u32_value));
 }
 
-static int ctrl_set_value_menu(struct bm2835_mmal_dev *dev,
+static int ctrl_set_iso(struct bm2835_mmal_dev *dev,
 		      struct v4l2_ctrl *ctrl,
 		      const struct bm2835_mmal_v4l2_ctrl *mmal_ctrl)
 {
@@ -211,12 +214,23 @@ static int ctrl_set_value_menu(struct bm
 	if (ctrl->val > mmal_ctrl->max || ctrl->val < mmal_ctrl->min)
 		return 1;
 
+	if (ctrl->id == V4L2_CID_ISO_SENSITIVITY)
+		dev->iso = iso_values[ctrl->val];
+	else if (ctrl->id == V4L2_CID_ISO_SENSITIVITY_AUTO)
+		dev->manual_iso_enabled =
+				(ctrl->val == V4L2_ISO_SENSITIVITY_MANUAL ?
+							true :
+							false);
+
 	control = &dev->component[MMAL_COMPONENT_CAMERA]->control;
 
-	u32_value = mmal_ctrl->imenu[ctrl->val];
+	if (dev->manual_iso_enabled)
+		u32_value = dev->iso;
+	else
+		u32_value = 0;
 
 	return vchiq_mmal_port_parameter_set(dev->instance, control,
-					     mmal_ctrl->mmal_id,
+					     MMAL_PARAMETER_ISO,
 					     &u32_value, sizeof(u32_value));
 }
 
@@ -956,7 +970,14 @@ static const struct bm2835_mmal_v4l2_ctr
 		V4L2_CID_ISO_SENSITIVITY, MMAL_CONTROL_TYPE_INT_MENU,
 		0, ARRAY_SIZE(iso_qmenu) - 1, 0, 1, iso_qmenu,
 		MMAL_PARAMETER_ISO,
-		&ctrl_set_value_menu,
+		&ctrl_set_iso,
+		false
+	},
+	{
+		V4L2_CID_ISO_SENSITIVITY_AUTO, MMAL_CONTROL_TYPE_STD_MENU,
+		0, 1, V4L2_ISO_SENSITIVITY_AUTO, 1, NULL,
+		MMAL_PARAMETER_ISO,
+		&ctrl_set_iso,
 		false
 	},
 	{
--- a/drivers/media/platform/bcm2835/mmal-parameters.h
+++ b/drivers/media/platform/bcm2835/mmal-parameters.h
@@ -654,3 +654,36 @@ struct mmal_parameter_imagefx_parameters
 	u32 num_effect_params;
 	u32 effect_parameter[MMAL_MAX_IMAGEFX_PARAMETERS];
 };
+
+#define MMAL_PARAMETER_CAMERA_INFO_MAX_CAMERAS 4
+#define MMAL_PARAMETER_CAMERA_INFO_MAX_FLASHES 2
+#define MMAL_PARAMETER_CAMERA_INFO_MAX_STR_LEN 16
+
+struct mmal_parameter_camera_info_camera_t {
+	u32    port_id;
+	u32    max_width;
+	u32    max_height;
+	u32    lens_present;
+	u8     camera_name[MMAL_PARAMETER_CAMERA_INFO_MAX_STR_LEN];
+};
+
+enum mmal_parameter_camera_info_flash_type_t {
+	/* Make values explicit to ensure they match values in config ini */
+	MMAL_PARAMETER_CAMERA_INFO_FLASH_TYPE_XENON = 0,
+	MMAL_PARAMETER_CAMERA_INFO_FLASH_TYPE_LED   = 1,
+	MMAL_PARAMETER_CAMERA_INFO_FLASH_TYPE_OTHER = 2,
+	MMAL_PARAMETER_CAMERA_INFO_FLASH_TYPE_MAX = 0x7FFFFFFF
+};
+
+struct mmal_parameter_camera_info_flash_t {
+	enum mmal_parameter_camera_info_flash_type_t flash_type;
+};
+
+struct mmal_parameter_camera_info_t {
+	u32                            num_cameras;
+	u32                            num_flashes;
+	struct mmal_parameter_camera_info_camera_t
+				cameras[MMAL_PARAMETER_CAMERA_INFO_MAX_CAMERAS];
+	struct mmal_parameter_camera_info_flash_t
+				flashes[MMAL_PARAMETER_CAMERA_INFO_MAX_FLASHES];
+};
