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authorLinus Torvalds <torvalds@linux-foundation.org>2022-10-23 01:30:15 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-10-23 01:30:15 +0300
commit3272eb1ace32627d0ba1d20373fae246f46770ca (patch)
treef38aa2fcb12c92c3ef6b1f7e75960bb5d4b7b8e7 /include/media
parent4da34b7d175dc99b8befebd69e96546c960d526c (diff)
parentd67614f276c1499ad939fa5c1aadd35498cc6b34 (diff)
downloadlinux-3272eb1ace32627d0ba1d20373fae246f46770ca.tar.xz
Merge tag 'media/v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull missed media updates from Mauro Carvalho Chehab: "It seems I screwed-up my previous pull request: it ends up that only half of the media patches that were in linux-next got merged in -rc1. The script which creates the signed tags silently failed due to 5.19->6.0 so it ended generating a tag with incomplete stuff. So here are the missing parts: - a DVB core security fix - lots of fixes and cleanups for atomisp staging driver - old drivers that are VB1 are being moved to staging to be deprecated - several driver updates - mostly for embedded systems, but there are also some things addressing issues with some PC webcams, in the UVC video driver" * tag 'media/v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (163 commits) media: sun6i-csi: Move csi buffer definition to main header file media: sun6i-csi: Introduce and use video helper functions media: sun6i-csi: Add media ops with link notify callback media: sun6i-csi: Remove controls handler from the driver media: sun6i-csi: Register the media device after creation media: sun6i-csi: Pass and store csi device directly in video code media: sun6i-csi: Tidy up video code media: sun6i-csi: Tidy up v4l2 code media: sun6i-csi: Tidy up Kconfig media: sun6i-csi: Use runtime pm for clocks and reset media: sun6i-csi: Define and use variant to get module clock rate media: sun6i-csi: Always set exclusive module clock rate media: sun6i-csi: Tidy up platform code media: sun6i-csi: Refactor main driver data structures media: sun6i-csi: Define and use driver name and (reworked) description media: cedrus: Add a Kconfig dependency on RESET_CONTROLLER media: sun8i-rotate: Add a Kconfig dependency on RESET_CONTROLLER media: sun8i-di: Add a Kconfig dependency on RESET_CONTROLLER media: sun4i-csi: Add a Kconfig dependency on RESET_CONTROLLER media: sun6i-csi: Add a Kconfig dependency on RESET_CONTROLLER ...
Diffstat (limited to 'include/media')
-rw-r--r--include/media/i2c/ir-kbd-i2c.h1
-rw-r--r--include/media/media-device.h15
-rw-r--r--include/media/media-entity.h169
-rw-r--r--include/media/v4l2-common.h3
-rw-r--r--include/media/v4l2-ctrls.h28
-rw-r--r--include/media/v4l2-dev.h102
-rw-r--r--include/media/v4l2-fwnode.h4
-rw-r--r--include/media/v4l2-subdev.h12
8 files changed, 269 insertions, 65 deletions
diff --git a/include/media/i2c/ir-kbd-i2c.h b/include/media/i2c/ir-kbd-i2c.h
index 9f47d6a48cff..0b58f8b9e7a4 100644
--- a/include/media/i2c/ir-kbd-i2c.h
+++ b/include/media/i2c/ir-kbd-i2c.h
@@ -35,6 +35,7 @@ enum ir_kbd_get_key_fn {
IR_KBD_GET_KEY_PIXELVIEW,
IR_KBD_GET_KEY_HAUP,
IR_KBD_GET_KEY_KNC1,
+ IR_KBD_GET_KEY_GENIATECH,
IR_KBD_GET_KEY_FUSIONHDTV,
IR_KBD_GET_KEY_HAUP_XVR,
IR_KBD_GET_KEY_AVERMEDIA_CARDBUS,
diff --git a/include/media/media-device.h b/include/media/media-device.h
index a10b30507524..86716ee7cc6c 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -192,21 +192,6 @@ struct usb_device;
#define MEDIA_DEV_NOTIFY_POST_LINK_CH 1
/**
- * media_entity_enum_init - Initialise an entity enumeration
- *
- * @ent_enum: Entity enumeration to be initialised
- * @mdev: The related media device
- *
- * Return: zero on success or a negative error code.
- */
-static inline __must_check int media_entity_enum_init(
- struct media_entity_enum *ent_enum, struct media_device *mdev)
-{
- return __media_entity_enum_init(ent_enum,
- mdev->entity_internal_idx_max + 1);
-}
-
-/**
* media_device_init() - Initializes a media device element
*
* @mdev: pointer to struct &media_device
diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index f16ffe70f7a6..28c9de8a1f34 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -17,6 +17,7 @@
#include <linux/fwnode.h>
#include <linux/list.h>
#include <linux/media.h>
+#include <linux/minmax.h>
#include <linux/types.h>
/* Enums used internally at the media controller to represent graphs */
@@ -99,12 +100,34 @@ struct media_graph {
/**
* struct media_pipeline - Media pipeline related information
*
- * @streaming_count: Streaming start count - streaming stop count
- * @graph: Media graph walk during pipeline start / stop
+ * @allocated: Media pipeline allocated and freed by the framework
+ * @mdev: The media device the pipeline is part of
+ * @pads: List of media_pipeline_pad
+ * @start_count: Media pipeline start - stop count
*/
struct media_pipeline {
- int streaming_count;
- struct media_graph graph;
+ bool allocated;
+ struct media_device *mdev;
+ struct list_head pads;
+ int start_count;
+};
+
+/**
+ * struct media_pipeline_pad - A pad part of a media pipeline
+ *
+ * @list: Entry in the media_pad pads list
+ * @pipe: The media_pipeline that the pad is part of
+ * @pad: The media pad
+ *
+ * This structure associate a pad with a media pipeline. Instances of
+ * media_pipeline_pad are created by media_pipeline_start() when it builds the
+ * pipeline, and stored in the &media_pad.pads list. media_pipeline_stop()
+ * removes the entries from the list and deletes them.
+ */
+struct media_pipeline_pad {
+ struct list_head list;
+ struct media_pipeline *pipe;
+ struct media_pad *pad;
};
/**
@@ -186,6 +209,8 @@ enum media_pad_signal_type {
* @flags: Pad flags, as defined in
* :ref:`include/uapi/linux/media.h <media_header>`
* (seek for ``MEDIA_PAD_FL_*``)
+ * @pipe: Pipeline this pad belongs to. Use media_entity_pipeline() to
+ * access this field.
*/
struct media_pad {
struct media_gobj graph_obj; /* must be first field in struct */
@@ -193,6 +218,12 @@ struct media_pad {
u16 index;
enum media_pad_signal_type sig_type;
unsigned long flags;
+
+ /*
+ * The fields below are private, and should only be accessed via
+ * appropriate functions.
+ */
+ struct media_pipeline *pipe;
};
/**
@@ -206,6 +237,14 @@ struct media_pad {
* @link_validate: Return whether a link is valid from the entity point of
* view. The media_pipeline_start() function
* validates all links by calling this operation. Optional.
+ * @has_pad_interdep: Return whether a two pads inside the entity are
+ * interdependent. If two pads are interdependent they are
+ * part of the same pipeline and enabling one of the pads
+ * means that the other pad will become "locked" and
+ * doesn't allow configuration changes. pad0 and pad1 are
+ * guaranteed to not both be sinks or sources.
+ * Optional: If the operation isn't implemented all pads
+ * will be considered as interdependent.
*
* .. note::
*
@@ -219,6 +258,8 @@ struct media_entity_operations {
const struct media_pad *local,
const struct media_pad *remote, u32 flags);
int (*link_validate)(struct media_link *link);
+ bool (*has_pad_interdep)(struct media_entity *entity, unsigned int pad0,
+ unsigned int pad1);
};
/**
@@ -269,7 +310,6 @@ enum media_entity_type {
* @links: List of data links.
* @ops: Entity operations.
* @use_count: Use count for the entity.
- * @pipe: Pipeline this entity belongs to.
* @info: Union with devnode information. Kept just for backward
* compatibility.
* @info.dev: Contains device major and minor info.
@@ -305,8 +345,6 @@ struct media_entity {
int use_count;
- struct media_pipeline *pipe;
-
union {
struct {
u32 major;
@@ -316,6 +354,18 @@ struct media_entity {
};
/**
+ * media_entity_for_each_pad - Iterate on all pads in an entity
+ * @entity: The entity the pads belong to
+ * @iter: The iterator pad
+ *
+ * Iterate on all pads in a media entity.
+ */
+#define media_entity_for_each_pad(entity, iter) \
+ for (iter = (entity)->pads; \
+ iter < &(entity)->pads[(entity)->num_pads]; \
+ ++iter)
+
+/**
* struct media_interface - A media interface graph object.
*
* @graph_obj: embedded graph object
@@ -426,15 +476,15 @@ static inline bool is_media_entity_v4l2_subdev(struct media_entity *entity)
}
/**
- * __media_entity_enum_init - Initialise an entity enumeration
+ * media_entity_enum_init - Initialise an entity enumeration
*
* @ent_enum: Entity enumeration to be initialised
- * @idx_max: Maximum number of entities in the enumeration
+ * @mdev: The related media device
*
- * Return: Returns zero on success or a negative error code.
+ * Return: zero on success or a negative error code.
*/
-__must_check int __media_entity_enum_init(struct media_entity_enum *ent_enum,
- int idx_max);
+__must_check int media_entity_enum_init(struct media_entity_enum *ent_enum,
+ struct media_device *mdev);
/**
* media_entity_enum_cleanup - Release resources of an entity enumeration
@@ -924,6 +974,18 @@ media_entity_remote_source_pad_unique(const struct media_entity *entity)
}
/**
+ * media_pad_is_streaming - Test if a pad is part of a streaming pipeline
+ * @pad: The pad
+ *
+ * Return: True if the pad is part of a pipeline started with the
+ * media_pipeline_start() function, false otherwise.
+ */
+static inline bool media_pad_is_streaming(const struct media_pad *pad)
+{
+ return pad->pipe;
+}
+
+/**
* media_entity_is_streaming - Test if an entity is part of a streaming pipeline
* @entity: The entity
*
@@ -932,10 +994,50 @@ media_entity_remote_source_pad_unique(const struct media_entity *entity)
*/
static inline bool media_entity_is_streaming(const struct media_entity *entity)
{
- return entity->pipe;
+ struct media_pad *pad;
+
+ media_entity_for_each_pad(entity, pad) {
+ if (media_pad_is_streaming(pad))
+ return true;
+ }
+
+ return false;
}
/**
+ * media_entity_pipeline - Get the media pipeline an entity is part of
+ * @entity: The entity
+ *
+ * DEPRECATED: use media_pad_pipeline() instead.
+ *
+ * This function returns the media pipeline that an entity has been associated
+ * with when constructing the pipeline with media_pipeline_start(). The pointer
+ * remains valid until media_pipeline_stop() is called.
+ *
+ * In general, entities can be part of multiple pipelines, when carrying
+ * multiple streams (either on different pads, or on the same pad using
+ * multiplexed streams). This function is to be used only for entities that
+ * do not support multiple pipelines.
+ *
+ * Return: The media_pipeline the entity is part of, or NULL if the entity is
+ * not part of any pipeline.
+ */
+struct media_pipeline *media_entity_pipeline(struct media_entity *entity);
+
+/**
+ * media_pad_pipeline - Get the media pipeline a pad is part of
+ * @pad: The pad
+ *
+ * This function returns the media pipeline that a pad has been associated
+ * with when constructing the pipeline with media_pipeline_start(). The pointer
+ * remains valid until media_pipeline_stop() is called.
+ *
+ * Return: The media_pipeline the pad is part of, or NULL if the pad is
+ * not part of any pipeline.
+ */
+struct media_pipeline *media_pad_pipeline(struct media_pad *pad);
+
+/**
* media_entity_get_fwnode_pad - Get pad number from fwnode
*
* @entity: The entity
@@ -1013,53 +1115,66 @@ struct media_entity *media_graph_walk_next(struct media_graph *graph);
/**
* media_pipeline_start - Mark a pipeline as streaming
- * @entity: Starting entity
- * @pipe: Media pipeline to be assigned to all entities in the pipeline.
+ * @pad: Starting pad
+ * @pipe: Media pipeline to be assigned to all pads in the pipeline.
*
- * Mark all entities connected to a given entity through enabled links, either
+ * Mark all pads connected to a given pad through enabled links, either
* directly or indirectly, as streaming. The given pipeline object is assigned
- * to every entity in the pipeline and stored in the media_entity pipe field.
+ * to every pad in the pipeline and stored in the media_pad pipe field.
*
* Calls to this function can be nested, in which case the same number of
* media_pipeline_stop() calls will be required to stop streaming. The
* pipeline pointer must be identical for all nested calls to
* media_pipeline_start().
*/
-__must_check int media_pipeline_start(struct media_entity *entity,
+__must_check int media_pipeline_start(struct media_pad *pad,
struct media_pipeline *pipe);
/**
* __media_pipeline_start - Mark a pipeline as streaming
*
- * @entity: Starting entity
- * @pipe: Media pipeline to be assigned to all entities in the pipeline.
+ * @pad: Starting pad
+ * @pipe: Media pipeline to be assigned to all pads in the pipeline.
*
* ..note:: This is the non-locking version of media_pipeline_start()
*/
-__must_check int __media_pipeline_start(struct media_entity *entity,
+__must_check int __media_pipeline_start(struct media_pad *pad,
struct media_pipeline *pipe);
/**
* media_pipeline_stop - Mark a pipeline as not streaming
- * @entity: Starting entity
+ * @pad: Starting pad
*
- * Mark all entities connected to a given entity through enabled links, either
- * directly or indirectly, as not streaming. The media_entity pipe field is
+ * Mark all pads connected to a given pads through enabled links, either
+ * directly or indirectly, as not streaming. The media_pad pipe field is
* reset to %NULL.
*
* If multiple calls to media_pipeline_start() have been made, the same
* number of calls to this function are required to mark the pipeline as not
* streaming.
*/
-void media_pipeline_stop(struct media_entity *entity);
+void media_pipeline_stop(struct media_pad *pad);
/**
* __media_pipeline_stop - Mark a pipeline as not streaming
*
- * @entity: Starting entity
+ * @pad: Starting pad
*
* .. note:: This is the non-locking version of media_pipeline_stop()
*/
-void __media_pipeline_stop(struct media_entity *entity);
+void __media_pipeline_stop(struct media_pad *pad);
+
+/**
+ * media_pipeline_alloc_start - Mark a pipeline as streaming
+ * @pad: Starting pad
+ *
+ * media_pipeline_alloc_start() is similar to media_pipeline_start() but instead
+ * of working on a given pipeline the function will use an existing pipeline if
+ * the pad is already part of a pipeline, or allocate a new pipeline.
+ *
+ * Calls to media_pipeline_alloc_start() must be matched with
+ * media_pipeline_stop().
+ */
+__must_check int media_pipeline_alloc_start(struct media_pad *pad);
/**
* media_devnode_create() - creates and initializes a device node interface
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 725ff91b26e0..1bdaea248089 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -175,7 +175,8 @@ struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
*
* @sd: pointer to &struct v4l2_subdev
* @client: pointer to struct i2c_client
- * @devname: the name of the device; if NULL, the I²C device's name will be used
+ * @devname: the name of the device; if NULL, the I²C device drivers's name
+ * will be used
* @postfix: sub-device specific string to put right after the I²C device name;
* may be NULL
*/
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index b76a0714d425..e59d9a234631 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -121,21 +121,19 @@ struct v4l2_ctrl_ops {
* struct v4l2_ctrl_type_ops - The control type operations that the driver
* has to provide.
*
- * @equal: return true if both values are equal.
- * @init: initialize the value.
+ * @equal: return true if all ctrl->elems array elements are equal.
+ * @init: initialize the value for array elements from from_idx to ctrl->elems.
* @log: log the value.
- * @validate: validate the value. Return 0 on success and a negative value
- * otherwise.
+ * @validate: validate the value for ctrl->new_elems array elements.
+ * Return 0 on success and a negative value otherwise.
*/
struct v4l2_ctrl_type_ops {
- bool (*equal)(const struct v4l2_ctrl *ctrl, u32 elems,
- union v4l2_ctrl_ptr ptr1,
- union v4l2_ctrl_ptr ptr2);
- void (*init)(const struct v4l2_ctrl *ctrl, u32 from_idx, u32 tot_elems,
+ bool (*equal)(const struct v4l2_ctrl *ctrl,
+ union v4l2_ctrl_ptr ptr1, union v4l2_ctrl_ptr ptr2);
+ void (*init)(const struct v4l2_ctrl *ctrl, u32 from_idx,
union v4l2_ctrl_ptr ptr);
void (*log)(const struct v4l2_ctrl *ctrl);
- int (*validate)(const struct v4l2_ctrl *ctrl, u32 elems,
- union v4l2_ctrl_ptr ptr);
+ int (*validate)(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr ptr);
};
/**
@@ -1543,13 +1541,12 @@ int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,
* v4l2_ctrl_type_op_equal - Default v4l2_ctrl_type_ops equal callback.
*
* @ctrl: The v4l2_ctrl pointer.
- * @elems: The number of elements to compare.
* @ptr1: A v4l2 control value.
* @ptr2: A v4l2 control value.
*
* Return: true if values are equal, otherwise false.
*/
-bool v4l2_ctrl_type_op_equal(const struct v4l2_ctrl *ctrl, u32 elems,
+bool v4l2_ctrl_type_op_equal(const struct v4l2_ctrl *ctrl,
union v4l2_ctrl_ptr ptr1, union v4l2_ctrl_ptr ptr2);
/**
@@ -1557,13 +1554,12 @@ bool v4l2_ctrl_type_op_equal(const struct v4l2_ctrl *ctrl, u32 elems,
*
* @ctrl: The v4l2_ctrl pointer.
* @from_idx: Starting element index.
- * @elems: The number of elements to initialize.
* @ptr: The v4l2 control value.
*
* Return: void
*/
void v4l2_ctrl_type_op_init(const struct v4l2_ctrl *ctrl, u32 from_idx,
- u32 elems, union v4l2_ctrl_ptr ptr);
+ union v4l2_ctrl_ptr ptr);
/**
* v4l2_ctrl_type_op_log - Default v4l2_ctrl_type_ops log callback.
@@ -1578,12 +1574,10 @@ void v4l2_ctrl_type_op_log(const struct v4l2_ctrl *ctrl);
* v4l2_ctrl_type_op_validate - Default v4l2_ctrl_type_ops validate callback.
*
* @ctrl: The v4l2_ctrl pointer.
- * @elems: The number of elements in the control.
* @ptr: The v4l2 control value.
*
* Return: 0 on success, a negative error code on failure.
*/
-int v4l2_ctrl_type_op_validate(const struct v4l2_ctrl *ctrl, u32 elems,
- union v4l2_ctrl_ptr ptr);
+int v4l2_ctrl_type_op_validate(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr ptr);
#endif
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index 5cf1edefb822..e0a13505f88d 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -539,4 +539,106 @@ static inline int video_is_registered(struct video_device *vdev)
return test_bit(V4L2_FL_REGISTERED, &vdev->flags);
}
+#if defined(CONFIG_MEDIA_CONTROLLER)
+
+/**
+ * video_device_pipeline_start - Mark a pipeline as streaming
+ * @vdev: Starting video device
+ * @pipe: Media pipeline to be assigned to all entities in the pipeline.
+ *
+ * Mark all entities connected to a given video device through enabled links,
+ * either directly or indirectly, as streaming. The given pipeline object is
+ * assigned to every pad in the pipeline and stored in the media_pad pipe
+ * field.
+ *
+ * Calls to this function can be nested, in which case the same number of
+ * video_device_pipeline_stop() calls will be required to stop streaming. The
+ * pipeline pointer must be identical for all nested calls to
+ * video_device_pipeline_start().
+ *
+ * The video device must contain a single pad.
+ *
+ * This is a convenience wrapper around media_pipeline_start().
+ */
+__must_check int video_device_pipeline_start(struct video_device *vdev,
+ struct media_pipeline *pipe);
+
+/**
+ * __video_device_pipeline_start - Mark a pipeline as streaming
+ * @vdev: Starting video device
+ * @pipe: Media pipeline to be assigned to all entities in the pipeline.
+ *
+ * ..note:: This is the non-locking version of video_device_pipeline_start()
+ *
+ * The video device must contain a single pad.
+ *
+ * This is a convenience wrapper around __media_pipeline_start().
+ */
+__must_check int __video_device_pipeline_start(struct video_device *vdev,
+ struct media_pipeline *pipe);
+
+/**
+ * video_device_pipeline_stop - Mark a pipeline as not streaming
+ * @vdev: Starting video device
+ *
+ * Mark all entities connected to a given video device through enabled links,
+ * either directly or indirectly, as not streaming. The media_pad pipe field
+ * is reset to %NULL.
+ *
+ * If multiple calls to media_pipeline_start() have been made, the same
+ * number of calls to this function are required to mark the pipeline as not
+ * streaming.
+ *
+ * The video device must contain a single pad.
+ *
+ * This is a convenience wrapper around media_pipeline_stop().
+ */
+void video_device_pipeline_stop(struct video_device *vdev);
+
+/**
+ * __video_device_pipeline_stop - Mark a pipeline as not streaming
+ * @vdev: Starting video device
+ *
+ * .. note:: This is the non-locking version of media_pipeline_stop()
+ *
+ * The video device must contain a single pad.
+ *
+ * This is a convenience wrapper around __media_pipeline_stop().
+ */
+void __video_device_pipeline_stop(struct video_device *vdev);
+
+/**
+ * video_device_pipeline_alloc_start - Mark a pipeline as streaming
+ * @vdev: Starting video device
+ *
+ * video_device_pipeline_alloc_start() is similar to video_device_pipeline_start()
+ * but instead of working on a given pipeline the function will use an
+ * existing pipeline if the video device is already part of a pipeline, or
+ * allocate a new pipeline.
+ *
+ * Calls to video_device_pipeline_alloc_start() must be matched with
+ * video_device_pipeline_stop().
+ */
+__must_check int video_device_pipeline_alloc_start(struct video_device *vdev);
+
+/**
+ * video_device_pipeline - Get the media pipeline a video device is part of
+ * @vdev: The video device
+ *
+ * This function returns the media pipeline that a video device has been
+ * associated with when constructing the pipeline with
+ * video_device_pipeline_start(). The pointer remains valid until
+ * video_device_pipeline_stop() is called.
+ *
+ * Return: The media_pipeline the video device is part of, or NULL if the video
+ * device is not part of any pipeline.
+ *
+ * The video device must contain a single pad.
+ *
+ * This is a convenience wrapper around media_entity_pipeline().
+ */
+struct media_pipeline *video_device_pipeline(struct video_device *vdev);
+
+#endif /* CONFIG_MEDIA_CONTROLLER */
+
#endif /* _V4L2_DEV_H */
diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
index 15e4ab672223..394d798f3dfa 100644
--- a/include/media/v4l2-fwnode.h
+++ b/include/media/v4l2-fwnode.h
@@ -45,10 +45,6 @@ struct v4l2_async_subdev;
*/
struct v4l2_fwnode_endpoint {
struct fwnode_endpoint base;
- /*
- * Fields below this line will be zeroed by
- * v4l2_fwnode_endpoint_parse()
- */
enum v4l2_mbus_type bus_type;
struct {
struct v4l2_mbus_config_parallel parallel;
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 9689f38a0af1..2f80c9c818ed 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -358,7 +358,11 @@ struct v4l2_mbus_frame_desc_entry {
} bus;
};
-#define V4L2_FRAME_DESC_ENTRY_MAX 4
+ /*
+ * If this number is too small, it should be dropped altogether and the
+ * API switched to a dynamic number of frame descriptor entries.
+ */
+#define V4L2_FRAME_DESC_ENTRY_MAX 8
/**
* enum v4l2_mbus_frame_desc_type - media bus frame description type
@@ -1046,6 +1050,8 @@ v4l2_subdev_get_pad_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
unsigned int pad)
{
+ if (WARN_ON(!state))
+ return NULL;
if (WARN_ON(pad >= sd->entity.num_pads))
pad = 0;
return &state->pads[pad].try_fmt;
@@ -1064,6 +1070,8 @@ v4l2_subdev_get_pad_crop(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
unsigned int pad)
{
+ if (WARN_ON(!state))
+ return NULL;
if (WARN_ON(pad >= sd->entity.num_pads))
pad = 0;
return &state->pads[pad].try_crop;
@@ -1082,6 +1090,8 @@ v4l2_subdev_get_pad_compose(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
unsigned int pad)
{
+ if (WARN_ON(!state))
+ return NULL;
if (WARN_ON(pad >= sd->entity.num_pads))
pad = 0;
return &state->pads[pad].try_compose;