V4L/DVB (5306): Add support for VIDIOC_G_CHIP_IDENT

VIDIOC_G_CHIP_IDENT improves debugging of card problems: it can be
used to detect which chips are on the board and based on that information
selected register dumps can be made, making it easy to debug complicated
media chips containing tens or hundreds of registers.
This ioctl replaces the internal VIDIOC_INT_G_CHIP_IDENT ioctl.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/media/video/saa7127.c b/drivers/media/video/saa7127.c
index 50dbb76d4a7f..9f986930490f 100644
--- a/drivers/media/video/saa7127.c
+++ b/drivers/media/video/saa7127.c
@@ -54,6 +54,7 @@
 #include <linux/i2c.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-common.h>
+#include <media/v4l2-chip-ident.h>
 #include <media/saa7127.h>
 
 static int debug = 0;
@@ -234,7 +235,7 @@ static struct i2c_reg_value saa7127_init_config_50hz[] = {
 
 struct saa7127_state {
         v4l2_std_id std;
-        enum v4l2_chip_ident ident;
+        u32 ident;
         enum saa7127_input_type input_type;
         enum saa7127_output_type output_type;
         int video_enable;
@@ -650,9 +651,8 @@ static int saa7127_command(struct i2c_client *client,
                 break;
         }
 
-        case VIDIOC_INT_G_CHIP_IDENT:
-                *(enum v4l2_chip_ident *)arg = state->ident;
-                break;
+        case VIDIOC_G_CHIP_IDENT:
+                return v4l2_chip_ident_i2c_client(client, arg, state->ident, 0);
 
         default:
                 return -EINVAL;