merge: http://linuxtv.org/hg/~hgoede/libv4l

From: Mauro Carvalho Chehab <mchehab@redhat.com>

Priority: normal

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 131 insertions, 40 deletions

diff --git a/linux/drivers/media/video/v4l2-common.c b/linux/drivers/media/video/v4l2-common.c
index a5ce43102..f94b5d92a 100644
--- a/linux/drivers/media/video/v4l2-common.c
+++ b/linux/drivers/media/video/v4l2-common.c
@@ -570,6 +570,7 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 ste
 	case V4L2_CID_RED_BALANCE:
 	case V4L2_CID_BLUE_BALANCE:
 	case V4L2_CID_GAMMA:
+	case V4L2_CID_SHARPNESS:
 		qctrl->flags |= V4L2_CTRL_FLAG_SLIDER;
 		break;
 	case V4L2_CID_PAN_RELATIVE:
@@ -739,8 +740,9 @@ EXPORT_SYMBOL(v4l2_chip_ident_i2c_client);
 
 /* ----------------------------------------------------------------- */
 
-/* Helper function for I2C legacy drivers */
+/* I2C Helper functions */
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
 int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
 		const char *name,
 		int (*probe)(struct i2c_client *, const struct i2c_device_id *))
@@ -766,11 +768,13 @@ int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver
 	return err != -ENOMEM ? 0 : err;
 }
 EXPORT_SYMBOL(v4l2_i2c_attach);
+#endif
 
 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
 		const struct v4l2_subdev_ops *ops)
 {
 	v4l2_subdev_init(sd, ops);
+	sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
 	/* the owner is the same as the i2c_client's driver owner */
 	sd->owner = client->driver->driver.owner;
 	/* i2c_client and v4l2_subdev point to one another */
@@ -783,7 +787,7 @@ void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
 }
 EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
 /* Supporting function to find a client on a specific address on the
    given adapter. Used for legacy i2c drivers. */
 static struct i2c_client *v4l2_i2c_legacy_find_client(struct i2c_adapter *adap, u8 addr)
@@ -814,33 +818,27 @@ static struct i2c_client *v4l2_i2c_legacy_find_client(struct i2c_adapter *adap,
 #endif
 
 
-/* Load an i2c sub-device. It assumes that i2c_get_adapdata(adapter)
-   returns the v4l2_device and that i2c_get_clientdata(client)
-   returns the v4l2_subdev. */
-struct v4l2_subdev *v4l2_i2c_new_subdev(struct i2c_adapter *adapter,
+/* Load an i2c sub-device. */
+struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
+		struct i2c_adapter *adapter,
 		const char *module_name, const char *client_type, u8 addr)
 {
-	struct v4l2_device *dev = i2c_get_adapdata(adapter);
 	struct v4l2_subdev *sd = NULL;
 	struct i2c_client *client;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
 	struct i2c_board_info info;
 #endif
 
-	BUG_ON(!dev);
-#ifdef MODULE
+	BUG_ON(!v4l2_dev);
+
 	if (module_name)
 		request_module(module_name);
-#endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
 	/* Setup the i2c board info with the device type and
 	   the device address. */
 	memset(&info, 0, sizeof(info));
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
-	strlcpy(info.driver_name, client_type, sizeof(info.driver_name));
-#else
 	strlcpy(info.type, client_type, sizeof(info.type));
-#endif
 	info.addr = addr;
 
 	/* Create the i2c client */
@@ -856,52 +854,53 @@ struct v4l2_subdev *v4l2_i2c_new_subdev(struct i2c_adapter *adapter,
 	   We need better support from the kernel so that we
 	   can easily wait for the load to finish. */
 	if (client == NULL || client->driver == NULL)
-		return NULL;
+		goto error;
 
 	/* Lock the module so we can safely get the v4l2_subdev pointer */
 	if (!try_module_get(client->driver->driver.owner))
-		return NULL;
+		goto error;
 	sd = i2c_get_clientdata(client);
 
 	/* Register with the v4l2_device which increases the module's
 	   use count as well. */
-	if (v4l2_device_register_subdev(dev, sd))
+	if (v4l2_device_register_subdev(v4l2_dev, sd))
 		sd = NULL;
 	/* Decrease the module use count to match the first try_module_get. */
 	module_put(client->driver->driver.owner);
-	return sd;
 
+error:
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+	/* If we have a client but no subdev, then something went wrong and
+	   we must unregister the client. */
+	if (client && sd == NULL)
+		i2c_unregister_device(client);
+#endif
+	return sd;
 }
 EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev);
 
-/* Probe and load an i2c sub-device. It assumes that i2c_get_adapdata(adapter)
-   returns the v4l2_device and that i2c_get_clientdata(client)
-   returns the v4l2_subdev. */
-struct v4l2_subdev *v4l2_i2c_new_probed_subdev(struct i2c_adapter *adapter,
+/* Probe and load an i2c sub-device. */
+struct v4l2_subdev *v4l2_i2c_new_probed_subdev(struct v4l2_device *v4l2_dev,
+	struct i2c_adapter *adapter,
 	const char *module_name, const char *client_type,
 	const unsigned short *addrs)
 {
-	struct v4l2_device *dev = i2c_get_adapdata(adapter);
 	struct v4l2_subdev *sd = NULL;
 	struct i2c_client *client = NULL;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
 	struct i2c_board_info info;
 #endif
 
-	BUG_ON(!dev);
-#ifdef MODULE
+	BUG_ON(!v4l2_dev);
+
 	if (module_name)
 		request_module(module_name);
-#endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
 	/* Setup the i2c board info with the device type and
 	   the device address. */
 	memset(&info, 0, sizeof(info));
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
-	strlcpy(info.driver_name, client_type, sizeof(info.driver_name));
-#else
 	strlcpy(info.type, client_type, sizeof(info.type));
-#endif
 
 	/* Probe and create the i2c client */
 	client = i2c_new_probed_device(adapter, &info, addrs);
@@ -918,23 +917,42 @@ struct v4l2_subdev *v4l2_i2c_new_probed_subdev(struct i2c_adapter *adapter,
 	   We need better support from the kernel so that we
 	   can easily wait for the load to finish. */
 	if (client == NULL || client->driver == NULL)
-		return NULL;
+		goto error;
 
 	/* Lock the module so we can safely get the v4l2_subdev pointer */
 	if (!try_module_get(client->driver->driver.owner))
-		return NULL;
+		goto error;
 	sd = i2c_get_clientdata(client);
 
 	/* Register with the v4l2_device which increases the module's
 	   use count as well. */
-	if (v4l2_device_register_subdev(dev, sd))
+	if (v4l2_device_register_subdev(v4l2_dev, sd))
 		sd = NULL;
 	/* Decrease the module use count to match the first try_module_get. */
 	module_put(client->driver->driver.owner);
+
+error:
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+	/* If we have a client but no subdev, then something went wrong and
+	   we must unregister the client. */
+	if (client && sd == NULL)
+		i2c_unregister_device(client);
+#endif
 	return sd;
 }
 EXPORT_SYMBOL_GPL(v4l2_i2c_new_probed_subdev);
 
+struct v4l2_subdev *v4l2_i2c_new_probed_subdev_addr(struct v4l2_device *v4l2_dev,
+		struct i2c_adapter *adapter,
+		const char *module_name, const char *client_type, u8 addr)
+{
+	unsigned short addrs[2] = { addr, I2C_CLIENT_END };
+
+	return v4l2_i2c_new_probed_subdev(v4l2_dev, adapter,
+			module_name, client_type, addrs);
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_new_probed_subdev_addr);
+
 /* Return i2c client address of v4l2_subdev. */
 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
 {
@@ -961,8 +979,7 @@ const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
 	};
 	static const unsigned short tv_addrs[] = {
 		0x42, 0x43, 0x4a, 0x4b,		/* tda8290 */
-		0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
-		0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+		0x60, 0x61, 0x62, 0x63, 0x64,
 		I2C_CLIENT_END
 	};
 
@@ -980,4 +997,78 @@ const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
 }
 EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
 
-#endif
+#endif /* defined(CONFIG_I2C) */
+
+/* Clamp x to be between min and max, aligned to a multiple of 2^align.  min
+ * and max don't have to be aligned, but there must be at least one valid
+ * value.  E.g., min=17,max=31,align=4 is not allowed as there are no multiples
+ * of 16 between 17 and 31.  */
+static unsigned int clamp_align(unsigned int x, unsigned int min,
+				unsigned int max, unsigned int align)
+{
+	/* Bits that must be zero to be aligned */
+	unsigned int mask = ~((1 << align) - 1);
+
+	/* Round to nearest aligned value */
+	if (align)
+		x = (x + (1 << (align - 1))) & mask;
+
+	/* Clamp to aligned value of min and max */
+	if (x < min)
+		x = (min + ~mask) & mask;
+	else if (x > max)
+		x = max & mask;
+
+	return x;
+}
+
+/* Bound an image to have a width between wmin and wmax, and height between
+ * hmin and hmax, inclusive.  Additionally, the width will be a multiple of
+ * 2^walign, the height will be a multiple of 2^halign, and the overall size
+ * (width*height) will be a multiple of 2^salign.  The image may be shrunk
+ * or enlarged to fit the alignment constraints.
+ *
+ * The width or height maximum must not be smaller than the corresponding
+ * minimum.  The alignments must not be so high there are no possible image
+ * sizes within the allowed bounds.  wmin and hmin must be at least 1
+ * (don't use 0).  If you don't care about a certain alignment, specify 0,
+ * as 2^0 is 1 and one byte alignment is equivalent to no alignment.  If
+ * you only want to adjust downward, specify a maximum that's the same as
+ * the initial value.
+ */
+void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
+			   unsigned int walign,
+			   u32 *h, unsigned int hmin, unsigned int hmax,
+			   unsigned int halign, unsigned int salign)
+{
+	*w = clamp_align(*w, wmin, wmax, walign);
+	*h = clamp_align(*h, hmin, hmax, halign);
+
+	/* Usually we don't need to align the size and are done now. */
+	if (!salign)
+		return;
+
+	/* How much alignment do we have? */
+	walign = __ffs(*w);
+	halign = __ffs(*h);
+	/* Enough to satisfy the image alignment? */
+	if (walign + halign < salign) {
+		/* Max walign where there is still a valid width */
+		unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
+		/* Max halign where there is still a valid height */
+		unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
+
+		/* up the smaller alignment until we have enough */
+		do {
+			if (halign >= hmaxa ||
+			    (walign <= halign && walign < wmaxa)) {
+				*w = clamp_align(*w, wmin, wmax, walign + 1);
+				walign = __ffs(*w);
+			} else {
+				*h = clamp_align(*h, hmin, hmax, halign + 1);
+				halign = __ffs(*h);
+			}
+		} while (halign + walign < salign);
+	}
+}
+EXPORT_SYMBOL_GPL(v4l_bound_align_image);