merge: http://www.linuxtv.org/hg/~hverkuil/v4l-dvb-core

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

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

14 files changed, 156 insertions, 79 deletions

diff --git a/linux/Documentation/video4linux/CARDLIST.em28xx b/linux/Documentation/video4linux/CARDLIST.em28xx
index b37eff3c9..b13fcbd5d 100644
--- a/linux/Documentation/video4linux/CARDLIST.em28xx
+++ b/linux/Documentation/video4linux/CARDLIST.em28xx
@@ -7,7 +7,7 @@
   6 -> Terratec Cinergy 200 USB                 (em2800)
   7 -> Leadtek Winfast USB II                   (em2800)        [0413:6023]
   8 -> Kworld USB2800                           (em2800)
-  9 -> Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker (em2820/em2840) [1b80:e302,2304:0207,2304:021a]
+  9 -> Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker  (em2820/em2840) [1b80:e302,1b80:e304,2304:0207,2304:021a]
  10 -> Hauppauge WinTV HVR 900                  (em2880)        [2040:6500]
  11 -> Terratec Hybrid XS                       (em2880)        [0ccd:0042]
  12 -> Kworld PVR TV 2800 RF                    (em2820/em2840)
diff --git a/linux/arch/arm/mach-pxa/pcm990-baseboard.c b/linux/arch/arm/mach-pxa/pcm990-baseboard.c
index 713f24c94..01791d74e 100644
--- a/linux/arch/arm/mach-pxa/pcm990-baseboard.c
+++ b/linux/arch/arm/mach-pxa/pcm990-baseboard.c
@@ -427,56 +427,25 @@ static void pcm990_camera_free_bus(struct soc_camera_link *link)
 	gpio_bus_switch = -EINVAL;
 }
 
+static struct soc_camera_link iclink = {
+	.bus_id	= 0, /* Must match with the camera ID above */
+	.query_bus_param = pcm990_camera_query_bus_param,
+	.set_bus_param = pcm990_camera_set_bus_param,
+	.free_bus = pcm990_camera_free_bus,
+};
+
 /* Board I2C devices. */
 static struct i2c_board_info __initdata pcm990_i2c_devices[] = {
 	{
 		/* Must initialize before the camera(s) */
 		I2C_BOARD_INFO("pca9536", 0x41),
 		.platform_data = &pca9536_data,
-	},
-};
-
-static struct i2c_board_info pcm990_camera_i2c[] = {
-	{
+	}, {
 		I2C_BOARD_INFO("mt9v022", 0x48),
+		.platform_data = &iclink, /* With extender */
 	}, {
 		I2C_BOARD_INFO("mt9m001", 0x5d),
-	},
-};
-
-static struct soc_camera_link iclink[] = {
-	{
-		.bus_id			= 0, /* Must match with the camera ID */
-		.board_info		= &pcm990_camera_i2c[0],
-		.i2c_adapter_id		= 0,
-		.query_bus_param	= pcm990_camera_query_bus_param,
-		.set_bus_param		= pcm990_camera_set_bus_param,
-		.free_bus		= pcm990_camera_free_bus,
-		.module_name		= "mt9v022",
-	}, {
-		.bus_id			= 0, /* Must match with the camera ID */
-		.board_info		= &pcm990_camera_i2c[1],
-		.i2c_adapter_id		= 0,
-		.query_bus_param	= pcm990_camera_query_bus_param,
-		.set_bus_param		= pcm990_camera_set_bus_param,
-		.free_bus		= pcm990_camera_free_bus,
-		.module_name		= "mt9m001",
-	},
-};
-
-static struct platform_device pcm990_camera[] = {
-	{
-		.name	= "soc-camera-pdrv",
-		.id	= 0,
-		.dev	= {
-			.platform_data = &iclink[0],
-		},
-	}, {
-		.name	= "soc-camera-pdrv",
-		.id	= 1,
-		.dev	= {
-			.platform_data = &iclink[1],
-		},
+		.platform_data = &iclink, /* With extender */
 	},
 };
 #endif /* CONFIG_VIDEO_PXA27x ||CONFIG_VIDEO_PXA27x_MODULE */
@@ -532,9 +501,6 @@ void __init pcm990_baseboard_init(void)
 	pxa_set_camera_info(&pcm990_pxacamera_platform_data);
 
 	i2c_register_board_info(0, ARRAY_AND_SIZE(pcm990_i2c_devices));
-
-	platform_device_register(&pcm990_camera[0]);
-	platform_device_register(&pcm990_camera[1]);
 #endif
 
 	printk(KERN_INFO "PCM-990 Evaluation baseboard initialized\n");
diff --git a/linux/arch/sh/boards/board-ap325rxa.c b/linux/arch/sh/boards/board-ap325rxa.c
index 96e5bae1c..48ab77ea0 100644
--- a/linux/arch/sh/boards/board-ap325rxa.c
+++ b/linux/arch/sh/boards/board-ap325rxa.c
@@ -581,7 +581,7 @@ static int __init ap325rxa_devices_setup(void)
 	return platform_add_devices(ap325rxa_devices,
 				ARRAY_SIZE(ap325rxa_devices));
 }
-device_initcall(ap325rxa_devices_setup);
+arch_initcall(ap325rxa_devices_setup);
 
 /* Return the board specific boot mode pin configuration */
 static int ap325rxa_mode_pins(void)
diff --git a/linux/arch/sh/boards/mach-migor/setup.c b/linux/arch/sh/boards/mach-migor/setup.c
index f70f4644d..f9b2e4df3 100644
--- a/linux/arch/sh/boards/mach-migor/setup.c
+++ b/linux/arch/sh/boards/mach-migor/setup.c
@@ -608,7 +608,7 @@ static int __init migor_devices_setup(void)
 
 	return platform_add_devices(migor_devices, ARRAY_SIZE(migor_devices));
 }
-__initcall(migor_devices_setup);
+arch_initcall(migor_devices_setup);
 
 /* Return the board specific boot mode pin configuration */
 static int migor_mode_pins(void)
diff --git a/linux/drivers/media/dvb/dvb-core/dvbdev.c b/linux/drivers/media/dvb/dvb-core/dvbdev.c
index f6084e19d..2028be23d 100644
--- a/linux/drivers/media/dvb/dvb-core/dvbdev.c
+++ b/linux/drivers/media/dvb/dvb-core/dvbdev.c
@@ -472,6 +472,17 @@ static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env)
 }
 #endif
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 31)
+static char *dvb_nodename(struct device *dev)
+{
+	struct dvb_device *dvbdev = dev_get_drvdata(dev);
+
+	return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d",
+		dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id);
+}
+
+
+#endif
 static int __init init_dvbdev(void)
 {
 	int retval;
@@ -501,6 +512,9 @@ static int __init init_dvbdev(void)
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
 	dvb_class->dev_uevent = dvb_uevent;
 #endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 31)
+	dvb_class->nodename = dvb_nodename;
+#endif
 	return 0;
 
 error:
diff --git a/linux/drivers/media/dvb/dvb-usb/af9015.c b/linux/drivers/media/dvb/dvb-usb/af9015.c
index aeb10db0b..69a00d610 100644
--- a/linux/drivers/media/dvb/dvb-usb/af9015.c
+++ b/linux/drivers/media/dvb/dvb-usb/af9015.c
@@ -108,7 +108,7 @@ static int af9015_rw_udev(struct usb_device *udev, struct req_t *req)
 	}
 
 	/* write requested */
-	if (write && req->data_len) {
+	if (write) {
 		memcpy(&buf[8], req->data, req->data_len);
 		msg_len += req->data_len;
 	}
diff --git a/linux/drivers/media/dvb/dvb-usb/dvb-usb-remote.c b/linux/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
index df72c8637..76c281b9d 100644
--- a/linux/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
+++ b/linux/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
@@ -12,6 +12,7 @@
 #include <linux/usb_input.h>
 #endif
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
 static int dvb_usb_getkeycode(struct input_dev *dev,
 				    int scancode, int *keycode)
 {
@@ -76,6 +77,7 @@ static int dvb_usb_setkeycode(struct input_dev *dev,
 
 	return -EINVAL;
 }
+#endif
 
 /* Remote-control poll function - called every dib->rc_query_interval ms to see
  * whether the remote control has received anything.
@@ -189,11 +191,11 @@ int dvb_usb_remote_init(struct dvb_usb_device *d)
 	usb_to_input_id(d->udev, &input_dev->id);
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
 	input_dev->dev.parent = &d->udev->dev;
+	input_dev->getkeycode = dvb_usb_getkeycode;
+	input_dev->setkeycode = dvb_usb_setkeycode;
 #else
 	input_dev->cdev.dev = &d->udev->dev;
 #endif
-	input_dev->getkeycode = dvb_usb_getkeycode;
-	input_dev->setkeycode = dvb_usb_setkeycode;
 
 	/* set the bits for the keys */
 	deb_rc("key map size: %d\n", d->props.rc_key_map_size);
@@ -211,7 +213,9 @@ int dvb_usb_remote_init(struct dvb_usb_device *d)
 	input_dev->rep[REP_PERIOD] = d->props.rc_interval;
 	input_dev->rep[REP_DELAY]  = d->props.rc_interval + 150;
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
 	input_set_drvdata(input_dev, d);
+#endif
 
 	err = input_register_device(input_dev);
 	if (err) {
diff --git a/linux/drivers/media/dvb/siano/Kconfig b/linux/drivers/media/dvb/siano/Kconfig
index ff297ceaf..8c1aed77e 100644
--- a/linux/drivers/media/dvb/siano/Kconfig
+++ b/linux/drivers/media/dvb/siano/Kconfig
@@ -28,7 +28,6 @@ config SMS_USB_DRV
 config SMS_SDIO_DRV
 	tristate "SDIO interface support"
 	depends on DVB_CORE && MMC
-	default m
 	---help---
 	  Choose if you would like to have Siano's support for SDIO interface
 endmenu
diff --git a/linux/drivers/media/video/dabusb.c b/linux/drivers/media/video/dabusb.c
index cb0a41c45..a0812ce91 100644
--- a/linux/drivers/media/video/dabusb.c
+++ b/linux/drivers/media/video/dabusb.c
@@ -813,8 +813,18 @@ static struct file_operations dabusb_fops =
 	.release =	dabusb_release,
 };
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 31)
+static char *dabusb_nodename(struct device *dev)
+{
+	return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
+}
+
+#endif
 static struct usb_class_driver dabusb_class = {
 	.name =		"dabusb%d",
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 31)
+	.nodename =	dabusb_nodename,
+#endif
 	.fops =		&dabusb_fops,
 	.minor_base =	DABUSB_MINOR,
 };
diff --git a/linux/drivers/media/video/davinci/vpif_display.c b/linux/drivers/media/video/davinci/vpif_display.c
index 0f0ec8dc6..a125a452d 100644
--- a/linux/drivers/media/video/davinci/vpif_display.c
+++ b/linux/drivers/media/video/davinci/vpif_display.c
@@ -1422,7 +1422,7 @@ vpif_init_free_channel_objects:
  */
 static __init int vpif_probe(struct platform_device *pdev)
 {
-	const struct subdev_info *subdevdata;
+	const struct vpif_subdev_info *subdevdata;
 	int i, j = 0, k, q, m, err = 0;
 	struct i2c_adapter *i2c_adap;
 	struct vpif_config *config;
diff --git a/linux/drivers/media/video/em28xx/em28xx-cards.c b/linux/drivers/media/video/em28xx/em28xx-cards.c
index d12c8c890..9712f9bd3 100644
--- a/linux/drivers/media/video/em28xx/em28xx-cards.c
+++ b/linux/drivers/media/video/em28xx/em28xx-cards.c
@@ -314,6 +314,7 @@ struct em28xx_board em28xx_boards[] = {
 	[EM2820_BOARD_TERRATEC_CINERGY_250] = {
 		.name         = "Terratec Cinergy 250 USB",
 		.tuner_type   = TUNER_LG_PAL_NEW_TAPC,
+		.has_ir_i2c   = 1,
 		.tda9887_conf = TDA9887_PRESENT,
 		.decoder      = EM28XX_SAA711X,
 		.input        = { {
@@ -333,6 +334,7 @@ struct em28xx_board em28xx_boards[] = {
 	[EM2820_BOARD_PINNACLE_USB_2] = {
 		.name         = "Pinnacle PCTV USB 2",
 		.tuner_type   = TUNER_LG_PAL_NEW_TAPC,
+		.has_ir_i2c   = 1,
 		.tda9887_conf = TDA9887_PRESENT,
 		.decoder      = EM28XX_SAA711X,
 		.input        = { {
@@ -357,6 +359,7 @@ struct em28xx_board em28xx_boards[] = {
 				TDA9887_PORT2_ACTIVE,
 		.decoder      = EM28XX_TVP5150,
 		.has_msp34xx  = 1,
+		.has_ir_i2c   = 1,
 		.input        = { {
 			.type     = EM28XX_VMUX_TELEVISION,
 			.vmux     = TVP5150_COMPOSITE0,
@@ -1004,6 +1007,7 @@ struct em28xx_board em28xx_boards[] = {
 	[EM2800_BOARD_TERRATEC_CINERGY_200] = {
 		.name         = "Terratec Cinergy 200 USB",
 		.is_em2800    = 1,
+		.has_ir_i2c   = 1,
 		.tuner_type   = TUNER_LG_PAL_NEW_TAPC,
 		.tda9887_conf = TDA9887_PRESENT,
 		.decoder      = EM28XX_SAA711X,
@@ -1077,7 +1081,8 @@ struct em28xx_board em28xx_boards[] = {
 		} },
 	},
 	[EM2820_BOARD_PINNACLE_DVC_90] = {
-		.name         = "Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker",
+		.name         = "Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker "
+				"/ Kworld DVD Maker 2",
 		.tuner_type   = TUNER_ABSENT, /* capture only board */
 		.decoder      = EM28XX_SAA711X,
 		.input        = { {
@@ -1682,6 +1687,8 @@ struct usb_device_id em28xx_id_table[] = {
 			.driver_info = EM2870_BOARD_KWORLD_355U },
 	{ USB_DEVICE(0x1b80, 0xe302),
 			.driver_info = EM2820_BOARD_PINNACLE_DVC_90 }, /* Kaiser Baas Video to DVD maker */
+	{ USB_DEVICE(0x1b80, 0xe304),
+			.driver_info = EM2820_BOARD_PINNACLE_DVC_90 }, /* Kworld DVD Maker 2 */
 	{ USB_DEVICE(0x0ccd, 0x0036),
 			.driver_info = EM2820_BOARD_TERRATEC_CINERGY_250 },
 	{ USB_DEVICE(0x0ccd, 0x004c),
@@ -2292,12 +2299,8 @@ void em28xx_register_i2c_ir(struct em28xx *dev)
 
 	/* detect & configure */
 	switch (dev->model) {
-	case (EM2800_BOARD_UNKNOWN):
-		break;
-	case (EM2820_BOARD_UNKNOWN):
-		break;
-	case (EM2800_BOARD_TERRATEC_CINERGY_200):
-	case (EM2820_BOARD_TERRATEC_CINERGY_250):
+	case EM2800_BOARD_TERRATEC_CINERGY_200:
+	case EM2820_BOARD_TERRATEC_CINERGY_250:
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
 		ir->ir_codes = &ir_codes_em_terratec_table;
 		ir->get_key = em28xx_get_key_terratec;
@@ -2309,7 +2312,7 @@ void em28xx_register_i2c_ir(struct em28xx *dev)
 		dev->init_data.name = "i2c IR (EM28XX Terratec)";
 #endif
 		break;
-	case (EM2820_BOARD_PINNACLE_USB_2):
+	case EM2820_BOARD_PINNACLE_USB_2:
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
 		ir->ir_codes = &ir_codes_pinnacle_grey_table;
 		ir->get_key = em28xx_get_key_pinnacle_usb_grey;
@@ -2321,7 +2324,7 @@ void em28xx_register_i2c_ir(struct em28xx *dev)
 		dev->init_data.name = "i2c IR (EM28XX Pinnacle PCTV)";
 #endif
 		break;
-	case (EM2820_BOARD_HAUPPAUGE_WINTV_USB_2):
+	case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2:
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
 		ir->ir_codes = &ir_codes_hauppauge_new_table;
 		ir->get_key = em28xx_get_key_em_haup;
@@ -2333,14 +2336,6 @@ void em28xx_register_i2c_ir(struct em28xx *dev)
 		dev->init_data.name = "i2c IR (EM2840 Hauppauge)";
 #endif
 		break;
-	case (EM2820_BOARD_MSI_VOX_USB_2):
-		break;
-	case (EM2800_BOARD_LEADTEK_WINFAST_USBII):
-		break;
-	case (EM2800_BOARD_KWORLD_USB2800):
-		break;
-	case (EM2800_BOARD_GRABBEEX_USB2800):
-		break;
 	}
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
 
@@ -2383,7 +2378,7 @@ void em28xx_card_setup(struct em28xx *dev)
 	case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
 	{
 		struct tveeprom tv;
-#ifdef CONFIG_MODULES
+#if defined(CONFIG_MODULES) && defined(MODULE)
 		request_module("tveeprom");
 #endif
 		/* Call first TVeeprom */
@@ -2397,10 +2392,6 @@ void em28xx_card_setup(struct em28xx *dev)
 			dev->i2s_speed = 2048000;
 			dev->board.has_msp34xx = 1;
 		}
-#ifdef CONFIG_MODULES
-		if (tv.has_ir)
-			request_module("ir-kbd-i2c");
-#endif
 		break;
 	}
 	case EM2882_BOARD_KWORLD_ATSC_315U:
@@ -2441,6 +2432,10 @@ void em28xx_card_setup(struct em28xx *dev)
 		break;
 	}
 
+#if defined(CONFIG_MODULES) && defined(MODULE)
+	if (dev->board.has_ir_i2c && !disable_ir)
+		request_module("ir-kbd-i2c");
+#endif
 	if (dev->board.has_snapshot_button)
 		em28xx_register_snapshot_button(dev);
 
diff --git a/linux/drivers/media/video/em28xx/em28xx.h b/linux/drivers/media/video/em28xx/em28xx.h
index e5d6b0695..3614402da 100644
--- a/linux/drivers/media/video/em28xx/em28xx.h
+++ b/linux/drivers/media/video/em28xx/em28xx.h
@@ -401,6 +401,7 @@ struct em28xx_board {
 	unsigned int is_webcam:1;
 	unsigned int no_audio:1;
 	unsigned int valid:1;
+	unsigned int has_ir_i2c:1;
 
 	unsigned char xclk, i2c_speed;
 	unsigned char radio_addr;
@@ -607,9 +608,11 @@ struct em28xx {
 
 	struct em28xx_dvb *dvb;
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
 	/* I2C keyboard data */
 	struct i2c_board_info info;
 	struct IR_i2c_init_data init_data;
+#endif
 };
 
 struct em28xx_ops {
diff --git a/linux/drivers/media/video/saa7134/saa7134.h b/linux/drivers/media/video/saa7134/saa7134.h
index d01281d1e..1bf2837b4 100644
--- a/linux/drivers/media/video/saa7134/saa7134.h
+++ b/linux/drivers/media/video/saa7134/saa7134.h
@@ -595,8 +595,10 @@ struct saa7134_dev {
 	unsigned int               insuspend;
 
 	/* I2C keyboard data */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
 	struct i2c_board_info      info;
 	struct IR_i2c_init_data    init_data;
+#endif
 
 	/* SAA7134_MPEG_* */
 	struct saa7134_ts          ts;
diff --git a/linux/drivers/media/video/videobuf-dma-contig.c b/linux/drivers/media/video/videobuf-dma-contig.c
index 633a124cf..bd1b13e93 100644
--- a/linux/drivers/media/video/videobuf-dma-contig.c
+++ b/linux/drivers/media/video/videobuf-dma-contig.c
@@ -17,6 +17,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/mm.h>
+#include <linux/pagemap.h>
 #include <linux/dma-mapping.h>
 #include <media/videobuf-dma-contig.h>
 #include "compat.h"
@@ -26,6 +27,7 @@ struct videobuf_dma_contig_memory {
 	void *vaddr;
 	dma_addr_t dma_handle;
 	unsigned long size;
+	int is_userptr;
 };
 
 #define MAGIC_DC_MEM 0x0733ac61
@@ -109,6 +111,82 @@ static struct vm_operations_struct videobuf_vm_ops = {
 	.close    = videobuf_vm_close,
 };
 
+/**
+ * videobuf_dma_contig_user_put() - reset pointer to user space buffer
+ * @mem: per-buffer private videobuf-dma-contig data
+ *
+ * This function resets the user space pointer
+ */
+static void videobuf_dma_contig_user_put(struct videobuf_dma_contig_memory *mem)
+{
+	mem->is_userptr = 0;
+	mem->dma_handle = 0;
+	mem->size = 0;
+}
+
+/**
+ * videobuf_dma_contig_user_get() - setup user space memory pointer
+ * @mem: per-buffer private videobuf-dma-contig data
+ * @vb: video buffer to map
+ *
+ * This function validates and sets up a pointer to user space memory.
+ * Only physically contiguous pfn-mapped memory is accepted.
+ *
+ * Returns 0 if successful.
+ */
+static int videobuf_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
+					struct videobuf_buffer *vb)
+{
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct *vma;
+	unsigned long prev_pfn, this_pfn;
+	unsigned long pages_done, user_address;
+	int ret;
+
+	mem->size = PAGE_ALIGN(vb->size);
+	mem->is_userptr = 0;
+	ret = -EINVAL;
+
+	down_read(&mm->mmap_sem);
+
+	vma = find_vma(mm, vb->baddr);
+	if (!vma)
+		goto out_up;
+
+	if ((vb->baddr + mem->size) > vma->vm_end)
+		goto out_up;
+
+	pages_done = 0;
+	prev_pfn = 0; /* kill warning */
+	user_address = vb->baddr;
+
+	while (pages_done < (mem->size >> PAGE_SHIFT)) {
+		ret = follow_pfn(vma, user_address, &this_pfn);
+		if (ret)
+			break;
+
+		if (pages_done == 0)
+			mem->dma_handle = this_pfn << PAGE_SHIFT;
+		else if (this_pfn != (prev_pfn + 1))
+			ret = -EFAULT;
+
+		if (ret)
+			break;
+
+		prev_pfn = this_pfn;
+		user_address += PAGE_SIZE;
+		pages_done++;
+	}
+
+	if (!ret)
+		mem->is_userptr = 1;
+
+ out_up:
+	up_read(&current->mm->mmap_sem);
+
+	return ret;
+}
+
 static void *__videobuf_alloc(size_t size)
 {
 	struct videobuf_dma_contig_memory *mem;
@@ -155,12 +233,11 @@ static int __videobuf_iolock(struct videobuf_queue *q,
 	case V4L2_MEMORY_USERPTR:
 		dev_dbg(q->dev, "%s memory method USERPTR\n", __func__);
 
-		/* The only USERPTR currently supported is the one needed for
-		   read() method.
-		 */
+		/* handle pointer from user space */
 		if (vb->baddr)
-			return -EINVAL;
+			return videobuf_dma_contig_user_get(mem, vb);
 
+		/* allocate memory for the read() method */
 		mem->size = PAGE_ALIGN(vb->size);
 		mem->vaddr = dma_alloc_coherent(q->dev, mem->size,
 						&mem->dma_handle, GFP_KERNEL);
@@ -387,7 +464,7 @@ void videobuf_dma_contig_free(struct videobuf_queue *q,
 	   So, it should free memory only if the memory were allocated for
 	   read() operation.
 	 */
-	if ((buf->memory != V4L2_MEMORY_USERPTR) || buf->baddr)
+	if (buf->memory != V4L2_MEMORY_USERPTR)
 		return;
 
 	if (!mem)
@@ -395,6 +472,13 @@ void videobuf_dma_contig_free(struct videobuf_queue *q,
 
 	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
 
+	/* handle user space pointer case */
+	if (buf->baddr) {
+		videobuf_dma_contig_user_put(mem);
+		return;
+	}
+
+	/* read() method */
 	dma_free_coherent(q->dev, mem->size, mem->vaddr, mem->dma_handle);
 	mem->vaddr = NULL;
 }