V4L/DVB (8639): saa6752hs: cleanup and add AC-3 support

Cleaned up the saa6752hs i2c driver.
Add AC-3 support.
Add VIDIOC_CHIP_IDENT support.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7134/saa7134-empress.c

@@ -29,6 +29,7 @@
 
 #include <media/saa6752hs.h>
 #include <media/v4l2-common.h>
+#include <media/v4l2-chip-ident.h>
 
 /* ------------------------------------------------------------------ */
 
@@ -403,6 +404,25 @@ static int empress_querymenu(struct file *file, void *priv,
 	return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYMENU, c);
 }
 
+static int empress_g_chip_ident(struct file *file, void *fh,
+	       struct v4l2_chip_ident *chip)
+{
+	struct saa7134_dev *dev = file->private_data;
+
+	chip->ident = V4L2_IDENT_NONE;
+	chip->revision = 0;
+	if (dev->mpeg_i2c_client == NULL)
+		return -EINVAL;
+	if (chip->match_type == V4L2_CHIP_MATCH_I2C_DRIVER &&
+	    chip->match_chip == I2C_DRIVERID_SAA6752HS)
+		return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
+	if (chip->match_type == V4L2_CHIP_MATCH_I2C_ADDR &&
+	    chip->match_chip == dev->mpeg_i2c_client->addr)
+		return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
+	return -EINVAL;
+}
+
+
 static const struct file_operations ts_fops =
 {
 	.owner	  = THIS_MODULE,
@@ -431,11 +451,11 @@ static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 	.vidioc_enum_input		= empress_enum_input,
 	.vidioc_g_input			= empress_g_input,
 	.vidioc_s_input			= empress_s_input,
-
 	.vidioc_queryctrl		= empress_queryctrl,
 	.vidioc_querymenu		= empress_querymenu,
 	.vidioc_g_ctrl			= empress_g_ctrl,
 	.vidioc_s_ctrl			= empress_s_ctrl,
+	.vidioc_g_chip_ident 		= empress_g_chip_ident,
 };
 
 /* ----------------------------------------------------------- */

drivers/media/video/v4l2-common.c

@@ -637,13 +637,17 @@ int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl)
 EXPORT_SYMBOL(v4l2_ctrl_query_fill_std);
 
 /* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and
-   the menu. The qctrl pointer may be NULL, in which case it is ignored. */
+   the menu. The qctrl pointer may be NULL, in which case it is ignored.
+   If menu_items is NULL, then the menu items are retrieved using
+   v4l2_ctrl_get_menu. */
 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl,
 	       const char **menu_items)
 {
 	int i;
 
 	qmenu->reserved = 0;
+	if (menu_items == NULL)
+		menu_items = v4l2_ctrl_get_menu(qmenu->id);
 	if (menu_items == NULL ||
 	    (qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum)))
 		return -EINVAL;

include/media/v4l2-chip-ident.h

@@ -72,6 +72,10 @@ enum {
 	/* module cs5345: just ident 5345 */
 	V4L2_IDENT_CS5345 = 5345,
 
+	/* module saa6752hs: reserved range 6750-6759 */
+	V4L2_IDENT_SAA6752HS = 6752,
+	V4L2_IDENT_SAA6752HS_AC3 = 6753,
+
 	/* module wm8739: just ident 8739 */
 	V4L2_IDENT_WM8739 = 8739,