[media] v4l2: add VIDIOC_G/S_EDID support to the v4l2 core

Support this ioctl as part of the v4l2 core. Use the new ioctl
name and struct v4l2_edid type in the existing core code.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/v4l2-core/v4l2-compat-ioctl32.c

@@ -740,7 +740,7 @@ static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *u
 	return 0;
 }
 
-struct v4l2_subdev_edid32 {
+struct v4l2_edid32 {
 	__u32 pad;
 	__u32 start_block;
 	__u32 blocks;
@@ -748,11 +748,11 @@ struct v4l2_subdev_edid32 {
 	compat_caddr_t edid;
 };
 
-static int get_v4l2_subdev_edid32(struct v4l2_subdev_edid *kp, struct v4l2_subdev_edid32 __user *up)
+static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
 {
 	u32 tmp;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_subdev_edid32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
 		get_user(kp->pad, &up->pad) ||
 		get_user(kp->start_block, &up->start_block) ||
 		get_user(kp->blocks, &up->blocks) ||
@@ -763,11 +763,11 @@ static int get_v4l2_subdev_edid32(struct v4l2_subdev_edid *kp, struct v4l2_subde
 	return 0;
 }
 
-static int put_v4l2_subdev_edid32(struct v4l2_subdev_edid *kp, struct v4l2_subdev_edid32 __user *up)
+static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
 {
 	u32 tmp = (u32)((unsigned long)kp->edid);
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_subdev_edid32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
 		put_user(kp->pad, &up->pad) ||
 		put_user(kp->start_block, &up->start_block) ||
 		put_user(kp->blocks, &up->blocks) ||
@@ -787,8 +787,8 @@ static int put_v4l2_subdev_edid32(struct v4l2_subdev_edid *kp, struct v4l2_subde
 #define VIDIOC_DQBUF32		_IOWR('V', 17, struct v4l2_buffer32)
 #define VIDIOC_ENUMSTD32	_IOWR('V', 25, struct v4l2_standard32)
 #define VIDIOC_ENUMINPUT32	_IOWR('V', 26, struct v4l2_input32)
-#define VIDIOC_SUBDEV_G_EDID32	_IOWR('V', 40, struct v4l2_subdev_edid32)
-#define VIDIOC_SUBDEV_S_EDID32	_IOWR('V', 41, struct v4l2_subdev_edid32)
+#define VIDIOC_G_EDID32		_IOWR('V', 40, struct v4l2_edid32)
+#define VIDIOC_S_EDID32		_IOWR('V', 41, struct v4l2_edid32)
 #define VIDIOC_TRY_FMT32      	_IOWR('V', 64, struct v4l2_format32)
 #define VIDIOC_G_EXT_CTRLS32    _IOWR('V', 71, struct v4l2_ext_controls32)
 #define VIDIOC_S_EXT_CTRLS32    _IOWR('V', 72, struct v4l2_ext_controls32)
@@ -816,7 +816,7 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 		struct v4l2_ext_controls v2ecs;
 		struct v4l2_event v2ev;
 		struct v4l2_create_buffers v2crt;
-		struct v4l2_subdev_edid v2edid;
+		struct v4l2_edid v2edid;
 		unsigned long vx;
 		int vi;
 	} karg;
@@ -849,8 +849,8 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 	case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
 	case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
 	case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
-	case VIDIOC_SUBDEV_G_EDID32: cmd = VIDIOC_SUBDEV_G_EDID; break;
-	case VIDIOC_SUBDEV_S_EDID32: cmd = VIDIOC_SUBDEV_S_EDID; break;
+	case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break;
+	case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break;
 	}
 
 	switch (cmd) {
@@ -868,9 +868,9 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_SUBDEV_G_EDID:
-	case VIDIOC_SUBDEV_S_EDID:
-		err = get_v4l2_subdev_edid32(&karg.v2edid, up);
+	case VIDIOC_G_EDID:
+	case VIDIOC_S_EDID:
+		err = get_v4l2_edid32(&karg.v2edid, up);
 		compatible_arg = 0;
 		break;
 
@@ -966,9 +966,9 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 		err = put_v4l2_event32(&karg.v2ev, up);
 		break;
 
-	case VIDIOC_SUBDEV_G_EDID:
-	case VIDIOC_SUBDEV_S_EDID:
-		err = put_v4l2_subdev_edid32(&karg.v2edid, up);
+	case VIDIOC_G_EDID:
+	case VIDIOC_S_EDID:
+		err = put_v4l2_edid32(&karg.v2edid, up);
 		break;
 
 	case VIDIOC_G_FMT:

drivers/media/v4l2-core/v4l2-dev.c

@@ -701,6 +701,7 @@ static void determine_valid_ioctls(struct video_device *vdev)
 			SET_VALID_IOCTL(ops, VIDIOC_G_AUDIO, vidioc_g_audio);
 			SET_VALID_IOCTL(ops, VIDIOC_S_AUDIO, vidioc_s_audio);
 			SET_VALID_IOCTL(ops, VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings);
+			SET_VALID_IOCTL(ops, VIDIOC_S_EDID, vidioc_s_edid);
 		}
 		if (is_tx) {
 			SET_VALID_IOCTL(ops, VIDIOC_ENUMOUTPUT, vidioc_enum_output);
@@ -726,6 +727,7 @@ static void determine_valid_ioctls(struct video_device *vdev)
 		SET_VALID_IOCTL(ops, VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings);
 		SET_VALID_IOCTL(ops, VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings);
 		SET_VALID_IOCTL(ops, VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap);
+		SET_VALID_IOCTL(ops, VIDIOC_G_EDID, vidioc_g_edid);
 	}
 	if (is_tx && (is_radio || is_sdr)) {
 		/* radio transmitter only ioctls */

drivers/media/v4l2-core/v4l2-ioctl.c

@@ -844,6 +844,14 @@ static void v4l_print_freq_band(const void *arg, bool write_only)
 			p->rangehigh, p->modulation);
 }
 
+static void v4l_print_edid(const void *arg, bool write_only)
+{
+	const struct v4l2_edid *p = arg;
+
+	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
+		p->pad, p->start_block, p->blocks);
+}
+
 static void v4l_print_u32(const void *arg, bool write_only)
 {
 	pr_cont("value=%u\n", *(const u32 *)arg);
@@ -2062,6 +2070,8 @@ static struct v4l2_ioctl_info v4l2_ioctls[] = {
 	IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
 	IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
 	IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
+	IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_CLEAR(v4l2_edid, edid)),
+	IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_edid, edid)),
 	IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
 	IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
 	IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
@@ -2274,9 +2284,9 @@ static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
 		break;
 	}
 
-	case VIDIOC_SUBDEV_G_EDID:
-	case VIDIOC_SUBDEV_S_EDID: {
-		struct v4l2_subdev_edid *edid = parg;
+	case VIDIOC_G_EDID:
+	case VIDIOC_S_EDID: {
+		struct v4l2_edid *edid = parg;
 
 		if (edid->blocks) {
 			if (edid->blocks > 256) {

drivers/media/v4l2-core/v4l2-subdev.c

@@ -349,10 +349,10 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
 			sd, pad, set_selection, subdev_fh, sel);
 	}
 
-	case VIDIOC_SUBDEV_G_EDID:
+	case VIDIOC_G_EDID:
 		return v4l2_subdev_call(sd, pad, get_edid, arg);
 
-	case VIDIOC_SUBDEV_S_EDID:
+	case VIDIOC_S_EDID:
 		return v4l2_subdev_call(sd, pad, set_edid, arg);
 #endif
 	default:

include/media/v4l2-ioctl.h

@@ -273,6 +273,8 @@ struct v4l2_ioctl_ops {
 				    struct v4l2_enum_dv_timings *timings);
 	int (*vidioc_dv_timings_cap) (struct file *file, void *fh,
 				    struct v4l2_dv_timings_cap *cap);
+	int (*vidioc_g_edid) (struct file *file, void *fh, struct v4l2_edid *edid);
+	int (*vidioc_s_edid) (struct file *file, void *fh, struct v4l2_edid *edid);
 
 	int (*vidioc_subscribe_event)  (struct v4l2_fh *fh,
 					const struct v4l2_event_subscription *sub);

include/media/v4l2-subdev.h

@@ -507,8 +507,8 @@ struct v4l2_subdev_pad_ops {
 			     struct v4l2_subdev_selection *sel);
 	int (*set_selection)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
 			     struct v4l2_subdev_selection *sel);
-	int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid);
-	int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid);
+	int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
+	int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
 #ifdef CONFIG_MEDIA_CONTROLLER
 	int (*link_validate)(struct v4l2_subdev *sd, struct media_link *link,
 			     struct v4l2_subdev_format *source_fmt,