Merge tag 'media/v6.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:

 - v4l core: subdev frame interval now supports which field

 - v4l kapi: moves and renames the init_cfg pad op to init_state as an
   internal op.

 - new sensor drivers: gc0308, gc2145, Avnet Alvium, ov64a40, tw9900

 - new camera driver: STM32 DCMIPP

 - s5p-mfc has gained MFC v12 support

 - new ISP driver added to staging: Starfive

 - new stateful encoder/decoded: Wave5 codec It is found on the J721S2
   SoC, JH7100 SoC, ssd202d SoC. Etc.

 - fwnode gained support for MIPI "DisCo for Imaging"
   (https://www.mipi.org/specifications/mipi-disco-imaging)

 - as usual, lots of cleanups, fixups and driver improvements.

* tag 'media/v6.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (309 commits)
  media: i2c: thp7312: select CONFIG_FW_LOADER
  media: i2c: mt9m114: use fsleep() in place of udelay()
  media: videobuf2: core: Rename min_buffers_needed field in vb2_queue
  media: i2c: thp7312: Store frame interval in subdev state
  media: docs: uAPI: Fix documentation of 'which' field for routing ioctls
  media: docs: uAPI: Expand error documentation for invalid 'which' value
  media: docs: uAPI: Clarify error documentation for invalid 'which' value
  media: v4l2-subdev: Store frame interval in subdev state
  media: v4l2-subdev: Add which field to struct v4l2_subdev_frame_interval
  media: v4l2-subdev: Turn .[gs]_frame_interval into pad operations
  media: v4l: subdev: Move out subdev state lock macros outside CONFIG_MEDIA_CONTROLLER
  media: s5p-mfc: DPB Count Independent of VIDIOC_REQBUF
  media: s5p-mfc: Load firmware for each run in MFCv12.
  media: s5p-mfc: Set context for valid case before calling try_run
  media: s5p-mfc: Add support for DMABUF for encoder
  media: s5p-mfc: Add support for UHD encoding.
  media: s5p-mfc: Add support for rate controls in MFCv12
  media: s5p-mfc: Add YV12 and I420 multiplanar format support
  media: s5p-mfc: Add initial support for MFCv12
  media: s5p-mfc: Rename IS_MFCV10 macro
  ...

11 files changed, 336 insertions, 234 deletions

diff --git a/include/linux/property.h b/include/linux/property.h
index 1f1166133e6b..60e35bd97398 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -135,6 +135,7 @@ struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode,
 
 const char *fwnode_get_name(const struct fwnode_handle *fwnode);
 const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode);
+bool fwnode_name_eq(const struct fwnode_handle *fwnode, const char *name);
 
 struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode);
 struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);
diff --git a/include/media/cec.h b/include/media/cec.h
index 53e4b2eb2b26..d77982685116 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -207,7 +207,20 @@ struct cec_adap_ops {
  *	passthrough mode.
  * @log_addrs:		current logical addresses
  * @conn_info:		current connector info
- * @tx_timeouts:	number of transmit timeouts
+ * @tx_timeout_cnt:	count the number of Timed Out transmits.
+ *			Reset to 0 when this is reported in cec_adap_status().
+ * @tx_low_drive_cnt:	count the number of Low Drive transmits.
+ *			Reset to 0 when this is reported in cec_adap_status().
+ * @tx_error_cnt:	count the number of Error transmits.
+ *			Reset to 0 when this is reported in cec_adap_status().
+ * @tx_arb_lost_cnt:	count the number of Arb Lost transmits.
+ *			Reset to 0 when this is reported in cec_adap_status().
+ * @tx_low_drive_log_cnt: number of logged Low Drive transmits since the
+ *			adapter was enabled. Used to avoid flooding the kernel
+ *			log if this happens a lot.
+ * @tx_error_log_cnt:	number of logged Error transmits since the adapter was
+ *                      enabled. Used to avoid flooding the kernel log if this
+ *                      happens a lot.
  * @notifier:		CEC notifier
  * @pin:		CEC pin status struct
  * @cec_dir:		debugfs cec directory
@@ -262,7 +275,12 @@ struct cec_adapter {
 	struct cec_log_addrs log_addrs;
 	struct cec_connector_info conn_info;
 
-	u32 tx_timeouts;
+	u32 tx_timeout_cnt;
+	u32 tx_low_drive_cnt;
+	u32 tx_error_cnt;
+	u32 tx_arb_lost_cnt;
+	u32 tx_low_drive_log_cnt;
+	u32 tx_error_log_cnt;
 
 #ifdef CONFIG_CEC_NOTIFIER
 	struct cec_notifier *notifier;
diff --git a/include/media/v4l2-cci.h b/include/media/v4l2-cci.h
index 0f6803e4b17e..4e96e90ee636 100644
--- a/include/media/v4l2-cci.h
+++ b/include/media/v4l2-cci.h
@@ -7,6 +7,8 @@
 #ifndef _V4L2_CCI_H
 #define _V4L2_CCI_H
 
+#include <linux/bitfield.h>
+#include <linux/bits.h>
 #include <linux/types.h>
 
 struct i2c_client;
@@ -32,12 +34,26 @@ struct cci_reg_sequence {
 #define CCI_REG_ADDR_MASK		GENMASK(15, 0)
 #define CCI_REG_WIDTH_SHIFT		16
 #define CCI_REG_WIDTH_MASK		GENMASK(19, 16)
+/*
+ * Private CCI register flags, for the use of drivers.
+ */
+#define CCI_REG_PRIVATE_SHIFT		28U
+#define CCI_REG_PRIVATE_MASK		GENMASK(31U, CCI_REG_PRIVATE_SHIFT)
+
+#define CCI_REG_WIDTH_BYTES(x)		FIELD_GET(CCI_REG_WIDTH_MASK, x)
+#define CCI_REG_WIDTH(x)		(CCI_REG_WIDTH_BYTES(x) << 3)
+#define CCI_REG_ADDR(x)			FIELD_GET(CCI_REG_ADDR_MASK, x)
+#define CCI_REG_LE			BIT(20)
 
 #define CCI_REG8(x)			((1 << CCI_REG_WIDTH_SHIFT) | (x))
 #define CCI_REG16(x)			((2 << CCI_REG_WIDTH_SHIFT) | (x))
 #define CCI_REG24(x)			((3 << CCI_REG_WIDTH_SHIFT) | (x))
 #define CCI_REG32(x)			((4 << CCI_REG_WIDTH_SHIFT) | (x))
 #define CCI_REG64(x)			((8 << CCI_REG_WIDTH_SHIFT) | (x))
+#define CCI_REG16_LE(x)			(CCI_REG_LE | (2U << CCI_REG_WIDTH_SHIFT) | (x))
+#define CCI_REG24_LE(x)			(CCI_REG_LE | (3U << CCI_REG_WIDTH_SHIFT) | (x))
+#define CCI_REG32_LE(x)			(CCI_REG_LE | (4U << CCI_REG_WIDTH_SHIFT) | (x))
+#define CCI_REG64_LE(x)			(CCI_REG_LE | (8U << CCI_REG_WIDTH_SHIFT) | (x))
 
 /**
  * cci_read() - Read a value from a single CCI register
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index d278836fd9cb..acf5be24a5ca 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -425,7 +425,7 @@ __v4l2_find_nearest_size(const void *array, size_t array_size,
 
 /**
  * v4l2_g_parm_cap - helper routine for vidioc_g_parm to fill this in by
- *      calling the g_frame_interval op of the given subdev. It only works
+ *      calling the get_frame_interval op of the given subdev. It only works
  *      for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the
  *      function name.
  *
@@ -438,7 +438,7 @@ int v4l2_g_parm_cap(struct video_device *vdev,
 
 /**
  * v4l2_s_parm_cap - helper routine for vidioc_s_parm to fill this in by
- *      calling the s_frame_interval op of the given subdev. It only works
+ *      calling the set_frame_interval op of the given subdev. It only works
  *      for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the
  *      function name.
  *
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h
index d6c8eb2b5201..7f1af1f7f912 100644
--- a/include/media/v4l2-mem2mem.h
+++ b/include/media/v4l2-mem2mem.h
@@ -84,6 +84,12 @@ struct v4l2_m2m_queue_ctx {
  * @last_src_buf: indicate the last source buffer for draining
  * @next_buf_last: next capture queud buffer will be tagged as last
  * @has_stopped: indicate the device has been stopped
+ * @ignore_cap_streaming: If true, job_ready can be called even if the CAPTURE
+ *			  queue is not streaming. This allows firmware to
+ *			  analyze the bitstream header which arrives on the
+ *			  OUTPUT queue. The driver must implement the job_ready
+ *			  callback correctly to make sure that the requirements
+ *			  for actual decoding are met.
  * @m2m_dev: opaque pointer to the internal data to handle M2M context
  * @cap_q_ctx: Capture (output to memory) queue context
  * @out_q_ctx: Output (input from memory) queue context
@@ -106,6 +112,7 @@ struct v4l2_m2m_ctx {
 	struct vb2_v4l2_buffer		*last_src_buf;
 	bool				next_buf_last;
 	bool				has_stopped;
+	bool				ignore_cap_streaming;
 
 	/* internal use only */
 	struct v4l2_m2m_dev		*m2m_dev;
@@ -661,7 +668,7 @@ v4l2_m2m_next_dst_buf(struct v4l2_m2m_ctx *m2m_ctx)
 struct vb2_v4l2_buffer *v4l2_m2m_last_buf(struct v4l2_m2m_queue_ctx *q_ctx);
 
 /**
- * v4l2_m2m_last_src_buf() - return last destination buffer from the list of
+ * v4l2_m2m_last_src_buf() - return last source buffer from the list of
  * ready buffers
  *
  * @m2m_ctx: m2m context assigned to the instance given by struct &v4l2_m2m_ctx
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index c1f90c1223a7..a9e6b8146279 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -452,12 +452,6 @@ enum v4l2_subdev_pre_streamon_flags {
  *
  * @g_pixelaspect: callback to return the pixelaspect ratio.
  *
- * @g_frame_interval: callback for VIDIOC_SUBDEV_G_FRAME_INTERVAL()
- *		      ioctl handler code.
- *
- * @s_frame_interval: callback for VIDIOC_SUBDEV_S_FRAME_INTERVAL()
- *		      ioctl handler code.
- *
  * @s_dv_timings: Set custom dv timings in the sub device. This is used
  *	when sub device is capable of setting detailed timing information
  *	in the hardware to generate/detect the video signal.
@@ -496,10 +490,6 @@ struct v4l2_subdev_video_ops {
 	int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
 	int (*s_stream)(struct v4l2_subdev *sd, int enable);
 	int (*g_pixelaspect)(struct v4l2_subdev *sd, struct v4l2_fract *aspect);
-	int (*g_frame_interval)(struct v4l2_subdev *sd,
-				struct v4l2_subdev_frame_interval *interval);
-	int (*s_frame_interval)(struct v4l2_subdev *sd,
-				struct v4l2_subdev_frame_interval *interval);
 	int (*s_dv_timings)(struct v4l2_subdev *sd,
 			struct v4l2_dv_timings *timings);
 	int (*g_dv_timings)(struct v4l2_subdev *sd,
@@ -688,21 +678,16 @@ struct v4l2_subdev_ir_ops {
 /**
  * struct v4l2_subdev_pad_config - Used for storing subdev pad information.
  *
- * @try_fmt: &struct v4l2_mbus_framefmt
- * @try_crop: &struct v4l2_rect to be used for crop
- * @try_compose: &struct v4l2_rect to be used for compose
- *
- * This structure only needs to be passed to the pad op if the 'which' field
- * of the main argument is set to %V4L2_SUBDEV_FORMAT_TRY. For
- * %V4L2_SUBDEV_FORMAT_ACTIVE it is safe to pass %NULL.
- *
- * Note: This struct is also used in active state, and the 'try' prefix is
- * historical and to be removed.
+ * @format: &struct v4l2_mbus_framefmt
+ * @crop: &struct v4l2_rect to be used for crop
+ * @compose: &struct v4l2_rect to be used for compose
+ * @interval: frame interval
  */
 struct v4l2_subdev_pad_config {
-	struct v4l2_mbus_framefmt try_fmt;
-	struct v4l2_rect try_crop;
-	struct v4l2_rect try_compose;
+	struct v4l2_mbus_framefmt format;
+	struct v4l2_rect crop;
+	struct v4l2_rect compose;
+	struct v4l2_fract interval;
 };
 
 /**
@@ -714,6 +699,7 @@ struct v4l2_subdev_pad_config {
  * @fmt: &struct v4l2_mbus_framefmt
  * @crop: &struct v4l2_rect to be used for crop
  * @compose: &struct v4l2_rect to be used for compose
+ * @interval: frame interval
  *
  * This structure stores configuration for a stream.
  */
@@ -725,6 +711,7 @@ struct v4l2_subdev_stream_config {
 	struct v4l2_mbus_framefmt fmt;
 	struct v4l2_rect crop;
 	struct v4l2_rect compose;
+	struct v4l2_fract interval;
 };
 
 /**
@@ -756,6 +743,7 @@ struct v4l2_subdev_krouting {
  *
  * @_lock: default for 'lock'
  * @lock: mutex for the state. May be replaced by the user.
+ * @sd: the sub-device which the state is related to
  * @pads: &struct v4l2_subdev_pad_config array
  * @routing: routing table for the subdev
  * @stream_configs: stream configurations (only for V4L2_SUBDEV_FL_STREAMS)
@@ -768,6 +756,7 @@ struct v4l2_subdev_state {
 	/* lock for the struct v4l2_subdev_state fields */
 	struct mutex _lock;
 	struct mutex *lock;
+	struct v4l2_subdev *sd;
 	struct v4l2_subdev_pad_config *pads;
 	struct v4l2_subdev_krouting routing;
 	struct v4l2_subdev_stream_configs stream_configs;
@@ -776,7 +765,6 @@ struct v4l2_subdev_state {
 /**
  * struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations
  *
- * @init_cfg: initialize the pad config to default values
  * @enum_mbus_code: callback for VIDIOC_SUBDEV_ENUM_MBUS_CODE() ioctl handler
  *		    code.
  * @enum_frame_size: callback for VIDIOC_SUBDEV_ENUM_FRAME_SIZE() ioctl handler
@@ -793,6 +781,12 @@ struct v4l2_subdev_state {
  *
  * @set_selection: callback for VIDIOC_SUBDEV_S_SELECTION() ioctl handler code.
  *
+ * @get_frame_interval: callback for VIDIOC_SUBDEV_G_FRAME_INTERVAL()
+ *			ioctl handler code.
+ *
+ * @set_frame_interval: callback for VIDIOC_SUBDEV_S_FRAME_INTERVAL()
+ *			ioctl handler code.
+ *
  * @get_edid: callback for VIDIOC_SUBDEV_G_EDID() ioctl handler code.
  *
  * @set_edid: callback for VIDIOC_SUBDEV_S_EDID() ioctl handler code.
@@ -841,8 +835,6 @@ struct v4l2_subdev_state {
  *	directly, use v4l2_subdev_disable_streams() instead.
  */
 struct v4l2_subdev_pad_ops {
-	int (*init_cfg)(struct v4l2_subdev *sd,
-			struct v4l2_subdev_state *state);
 	int (*enum_mbus_code)(struct v4l2_subdev *sd,
 			      struct v4l2_subdev_state *state,
 			      struct v4l2_subdev_mbus_code_enum *code);
@@ -864,6 +856,12 @@ struct v4l2_subdev_pad_ops {
 	int (*set_selection)(struct v4l2_subdev *sd,
 			     struct v4l2_subdev_state *state,
 			     struct v4l2_subdev_selection *sel);
+	int (*get_frame_interval)(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state,
+				  struct v4l2_subdev_frame_interval *interval);
+	int (*set_frame_interval)(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state,
+				  struct v4l2_subdev_frame_interval *interval);
 	int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
 	int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
 	int (*dv_timings_cap)(struct v4l2_subdev *sd,
@@ -919,6 +917,8 @@ struct v4l2_subdev_ops {
 /**
  * struct v4l2_subdev_internal_ops - V4L2 subdev internal ops
  *
+ * @init_state: initialize the subdev state to default values
+ *
  * @registered: called when this subdev is registered. When called the v4l2_dev
  *	field is set to the correct v4l2_device.
  *
@@ -944,6 +944,8 @@ struct v4l2_subdev_ops {
  *	these ops.
  */
 struct v4l2_subdev_internal_ops {
+	int (*init_state)(struct v4l2_subdev *sd,
+			  struct v4l2_subdev_state *state);
 	int (*registered)(struct v4l2_subdev *sd);
 	void (*unregistered)(struct v4l2_subdev *sd);
 	int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
@@ -1142,83 +1144,6 @@ struct v4l2_subdev_fh {
 #define to_v4l2_subdev_fh(fh)	\
 	container_of(fh, struct v4l2_subdev_fh, vfh)
 
-#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
-
-/**
- * v4l2_subdev_get_pad_format - ancillary routine to call
- *	&struct v4l2_subdev_pad_config->try_fmt
- *
- * @sd: pointer to &struct v4l2_subdev
- * @state: pointer to &struct v4l2_subdev_state
- * @pad: index of the pad in the &struct v4l2_subdev_state->pads array
- */
-static inline struct v4l2_mbus_framefmt *
-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;
-}
-
-/**
- * v4l2_subdev_get_pad_crop - ancillary routine to call
- *	&struct v4l2_subdev_pad_config->try_crop
- *
- * @sd: pointer to &struct v4l2_subdev
- * @state: pointer to &struct v4l2_subdev_state.
- * @pad: index of the pad in the &struct v4l2_subdev_state->pads array.
- */
-static inline struct v4l2_rect *
-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;
-}
-
-/**
- * v4l2_subdev_get_pad_compose - ancillary routine to call
- *	&struct v4l2_subdev_pad_config->try_compose
- *
- * @sd: pointer to &struct v4l2_subdev
- * @state: pointer to &struct v4l2_subdev_state.
- * @pad: index of the pad in the &struct v4l2_subdev_state->pads array.
- */
-static inline struct v4l2_rect *
-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;
-}
-
-/*
- * Temprary helpers until uses of v4l2_subdev_get_try_* functions have been
- * renamed
- */
-#define v4l2_subdev_get_try_format(sd, state, pad) \
-	v4l2_subdev_get_pad_format(sd, state, pad)
-
-#define v4l2_subdev_get_try_crop(sd, state, pad) \
-	v4l2_subdev_get_pad_crop(sd, state, pad)
-
-#define v4l2_subdev_get_try_compose(sd, state, pad) \
-	v4l2_subdev_get_pad_compose(sd, state, pad)
-
-#endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
-
 extern const struct v4l2_file_operations v4l2_subdev_fops;
 
 /**
@@ -1392,88 +1317,105 @@ int __v4l2_subdev_init_finalize(struct v4l2_subdev *sd, const char *name,
  */
 void v4l2_subdev_cleanup(struct v4l2_subdev *sd);
 
-/**
- * v4l2_subdev_lock_state() - Locks the subdev state
- * @state: The subdevice state
- *
- * Locks the given subdev state.
- *
- * The state must be unlocked with v4l2_subdev_unlock_state() after use.
+/*
+ * A macro to generate the macro or function name for sub-devices state access
+ * wrapper macros below.
  */
-static inline void v4l2_subdev_lock_state(struct v4l2_subdev_state *state)
-{
-	mutex_lock(state->lock);
-}
+#define __v4l2_subdev_state_gen_call(NAME, _1, ARG, ...)	\
+	__v4l2_subdev_state_get_ ## NAME ## ARG
 
 /**
- * v4l2_subdev_unlock_state() - Unlocks the subdev state
- * @state: The subdevice state
+ * v4l2_subdev_state_get_format() - Get pointer to a stream format
+ * @state: subdevice state
+ * @pad: pad id
+ * @...: stream id (optional argument)
  *
- * Unlocks the given subdev state.
+ * This returns a pointer to &struct v4l2_mbus_framefmt for the given pad +
+ * stream in the subdev state.
+ *
+ * For stream-unaware drivers the format for the corresponding pad is returned.
+ * If the pad does not exist, NULL is returned.
  */
-static inline void v4l2_subdev_unlock_state(struct v4l2_subdev_state *state)
-{
-	mutex_unlock(state->lock);
-}
+/*
+ * Wrap v4l2_subdev_state_get_format(), allowing the function to be called with
+ * two or three arguments. The purpose of the __v4l2_subdev_state_get_format()
+ * macro below is to come up with the name of the function or macro to call,
+ * using the last two arguments (_stream and _pad). The selected function or
+ * macro is then called using the arguments specified by the caller. A similar
+ * arrangement is used for v4l2_subdev_state_crop() and
+ * v4l2_subdev_state_compose() below.
+ */
+#define v4l2_subdev_state_get_format(state, pad, ...)			\
+	__v4l2_subdev_state_gen_call(format, ##__VA_ARGS__, , _pad)	\
+		(state, pad, ##__VA_ARGS__)
+#define __v4l2_subdev_state_get_format_pad(state, pad)	\
+	__v4l2_subdev_state_get_format(state, pad, 0)
+struct v4l2_mbus_framefmt *
+__v4l2_subdev_state_get_format(struct v4l2_subdev_state *state,
+			       unsigned int pad, u32 stream);
 
 /**
- * v4l2_subdev_get_unlocked_active_state() - Checks that the active subdev state
- *					     is unlocked and returns it
- * @sd: The subdevice
+ * v4l2_subdev_state_get_crop() - Get pointer to a stream crop rectangle
+ * @state: subdevice state
+ * @pad: pad id
+ * @...: stream id (optional argument)
  *
- * Returns the active state for the subdevice, or NULL if the subdev does not
- * support active state. If the state is not NULL, calls
- * lockdep_assert_not_held() to issue a warning if the state is locked.
+ * This returns a pointer to crop rectangle for the given pad + stream in the
+ * subdev state.
  *
- * This function is to be used e.g. when getting the active state for the sole
- * purpose of passing it forward, without accessing the state fields.
+ * For stream-unaware drivers the crop rectangle for the corresponding pad is
+ * returned. If the pad does not exist, NULL is returned.
  */
-static inline struct v4l2_subdev_state *
-v4l2_subdev_get_unlocked_active_state(struct v4l2_subdev *sd)
-{
-	if (sd->active_state)
-		lockdep_assert_not_held(sd->active_state->lock);
-	return sd->active_state;
-}
+#define v4l2_subdev_state_get_crop(state, pad, ...)			\
+	__v4l2_subdev_state_gen_call(crop, ##__VA_ARGS__, , _pad)	\
+		(state, pad, ##__VA_ARGS__)
+#define __v4l2_subdev_state_get_crop_pad(state, pad)	\
+	__v4l2_subdev_state_get_crop(state, pad, 0)
+struct v4l2_rect *
+__v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad,
+			     u32 stream);
 
 /**
- * v4l2_subdev_get_locked_active_state() - Checks that the active subdev state
- *					   is locked and returns it
- *
- * @sd: The subdevice
+ * v4l2_subdev_state_get_compose() - Get pointer to a stream compose rectangle
+ * @state: subdevice state
+ * @pad: pad id
+ * @...: stream id (optional argument)
  *
- * Returns the active state for the subdevice, or NULL if the subdev does not
- * support active state. If the state is not NULL, calls lockdep_assert_held()
- * to issue a warning if the state is not locked.
+ * This returns a pointer to compose rectangle for the given pad + stream in the
+ * subdev state.
  *
- * This function is to be used when the caller knows that the active state is
- * already locked.
+ * For stream-unaware drivers the compose rectangle for the corresponding pad is
+ * returned. If the pad does not exist, NULL is returned.
  */
-static inline struct v4l2_subdev_state *
-v4l2_subdev_get_locked_active_state(struct v4l2_subdev *sd)
-{
-	if (sd->active_state)
-		lockdep_assert_held(sd->active_state->lock);
-	return sd->active_state;
-}
+#define v4l2_subdev_state_get_compose(state, pad, ...)			\
+	__v4l2_subdev_state_gen_call(compose, ##__VA_ARGS__, , _pad)	\
+		(state, pad, ##__VA_ARGS__)
+#define __v4l2_subdev_state_get_compose_pad(state, pad)	\
+	__v4l2_subdev_state_get_compose(state, pad, 0)
+struct v4l2_rect *
+__v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state,
+				unsigned int pad, u32 stream);
 
 /**
- * v4l2_subdev_lock_and_get_active_state() - Locks and returns the active subdev
- *					     state for the subdevice
- * @sd: The subdevice
+ * v4l2_subdev_state_get_interval() - Get pointer to a stream frame interval
+ * @state: subdevice state
+ * @pad: pad id
+ * @...: stream id (optional argument)
  *
- * Returns the locked active state for the subdevice, or NULL if the subdev
- * does not support active state.
+ * This returns a pointer to the frame interval for the given pad + stream in
+ * the subdev state.
  *
- * The state must be unlocked with v4l2_subdev_unlock_state() after use.
+ * For stream-unaware drivers the frame interval for the corresponding pad is
+ * returned. If the pad does not exist, NULL is returned.
  */
-static inline struct v4l2_subdev_state *
-v4l2_subdev_lock_and_get_active_state(struct v4l2_subdev *sd)
-{
-	if (sd->active_state)
-		v4l2_subdev_lock_state(sd->active_state);
-	return sd->active_state;
-}
+#define v4l2_subdev_state_get_interval(state, pad, ...)			\
+	__v4l2_subdev_state_gen_call(interval, ##__VA_ARGS__, , _pad)	\
+		(state, pad, ##__VA_ARGS__)
+#define __v4l2_subdev_state_get_interval_pad(state, pad)	\
+	__v4l2_subdev_state_get_interval(state, pad, 0)
+struct v4l2_fract *
+__v4l2_subdev_state_get_interval(struct v4l2_subdev_state *state,
+				 unsigned int pad, u32 stream);
 
 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
 
@@ -1495,6 +1437,24 @@ int v4l2_subdev_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state,
 			struct v4l2_subdev_format *format);
 
 /**
+ * v4l2_subdev_get_frame_interval() - Fill frame interval based on state
+ * @sd: subdevice
+ * @state: subdevice state
+ * @fi: pointer to &struct v4l2_subdev_frame_interval
+ *
+ * Fill @fi->interval field based on the information in the @fi struct.
+ *
+ * This function can be used by the subdev drivers which support active state to
+ * implement v4l2_subdev_pad_ops.get_frame_interval if the subdev driver does
+ * not need to do anything special in their get_frame_interval op.
+ *
+ * Returns 0 on success, error value otherwise.
+ */
+int v4l2_subdev_get_frame_interval(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *state,
+				   struct v4l2_subdev_frame_interval *fi);
+
+/**
  * v4l2_subdev_set_routing() - Set given routing to subdev state
  * @sd: The subdevice
  * @state: The subdevice state
@@ -1540,52 +1500,6 @@ int v4l2_subdev_set_routing_with_fmt(struct v4l2_subdev *sd,
 				     const struct v4l2_mbus_framefmt *fmt);
 
 /**
- * v4l2_subdev_state_get_stream_format() - Get pointer to a stream format
- * @state: subdevice state
- * @pad: pad id
- * @stream: stream id
- *
- * This returns a pointer to &struct v4l2_mbus_framefmt for the given pad +
- * stream in the subdev state.
- *
- * If the state does not contain the given pad + stream, NULL is returned.
- */
-struct v4l2_mbus_framefmt *
-v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state,
-				    unsigned int pad, u32 stream);
-
-/**
- * v4l2_subdev_state_get_stream_crop() - Get pointer to a stream crop rectangle
- * @state: subdevice state
- * @pad: pad id
- * @stream: stream id
- *
- * This returns a pointer to crop rectangle for the given pad + stream in the
- * subdev state.
- *
- * If the state does not contain the given pad + stream, NULL is returned.
- */
-struct v4l2_rect *
-v4l2_subdev_state_get_stream_crop(struct v4l2_subdev_state *state,
-				  unsigned int pad, u32 stream);
-
-/**
- * v4l2_subdev_state_get_stream_compose() - Get pointer to a stream compose
- *					    rectangle
- * @state: subdevice state
- * @pad: pad id
- * @stream: stream id
- *
- * This returns a pointer to compose rectangle for the given pad + stream in the
- * subdev state.
- *
- * If the state does not contain the given pad + stream, NULL is returned.
- */
-struct v4l2_rect *
-v4l2_subdev_state_get_stream_compose(struct v4l2_subdev_state *state,
-				     unsigned int pad, u32 stream);
-
-/**
  * v4l2_subdev_routing_find_opposite_end() - Find the opposite stream
  * @routing: routing used to find the opposite side
  * @pad: pad id
@@ -1787,6 +1701,89 @@ int v4l2_subdev_s_stream_helper(struct v4l2_subdev *sd, int enable);
 #endif /* CONFIG_MEDIA_CONTROLLER */
 
 /**
+ * v4l2_subdev_lock_state() - Locks the subdev state
+ * @state: The subdevice state
+ *
+ * Locks the given subdev state.
+ *
+ * The state must be unlocked with v4l2_subdev_unlock_state() after use.
+ */
+static inline void v4l2_subdev_lock_state(struct v4l2_subdev_state *state)
+{
+	mutex_lock(state->lock);
+}
+
+/**
+ * v4l2_subdev_unlock_state() - Unlocks the subdev state
+ * @state: The subdevice state
+ *
+ * Unlocks the given subdev state.
+ */
+static inline void v4l2_subdev_unlock_state(struct v4l2_subdev_state *state)
+{
+	mutex_unlock(state->lock);
+}
+
+/**
+ * v4l2_subdev_get_unlocked_active_state() - Checks that the active subdev state
+ *					     is unlocked and returns it
+ * @sd: The subdevice
+ *
+ * Returns the active state for the subdevice, or NULL if the subdev does not
+ * support active state. If the state is not NULL, calls
+ * lockdep_assert_not_held() to issue a warning if the state is locked.
+ *
+ * This function is to be used e.g. when getting the active state for the sole
+ * purpose of passing it forward, without accessing the state fields.
+ */
+static inline struct v4l2_subdev_state *
+v4l2_subdev_get_unlocked_active_state(struct v4l2_subdev *sd)
+{
+	if (sd->active_state)
+		lockdep_assert_not_held(sd->active_state->lock);
+	return sd->active_state;
+}
+
+/**
+ * v4l2_subdev_get_locked_active_state() - Checks that the active subdev state
+ *					   is locked and returns it
+ *
+ * @sd: The subdevice
+ *
+ * Returns the active state for the subdevice, or NULL if the subdev does not
+ * support active state. If the state is not NULL, calls lockdep_assert_held()
+ * to issue a warning if the state is not locked.
+ *
+ * This function is to be used when the caller knows that the active state is
+ * already locked.
+ */
+static inline struct v4l2_subdev_state *
+v4l2_subdev_get_locked_active_state(struct v4l2_subdev *sd)
+{
+	if (sd->active_state)
+		lockdep_assert_held(sd->active_state->lock);
+	return sd->active_state;
+}
+
+/**
+ * v4l2_subdev_lock_and_get_active_state() - Locks and returns the active subdev
+ *					     state for the subdevice
+ * @sd: The subdevice
+ *
+ * Returns the locked active state for the subdevice, or NULL if the subdev
+ * does not support active state.
+ *
+ * The state must be unlocked with v4l2_subdev_unlock_state() after use.
+ */
+static inline struct v4l2_subdev_state *
+v4l2_subdev_lock_and_get_active_state(struct v4l2_subdev *sd)
+{
+	if (sd->active_state)
+		v4l2_subdev_lock_state(sd->active_state);
+	return sd->active_state;
+}
+
+/**
  * v4l2_subdev_init - initializes the sub-device struct
  *
  * @sd: pointer to the &struct v4l2_subdev to be initialized
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 4b6a9d2ea372..56719a26a46c 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -402,7 +402,7 @@ struct vb2_buffer {
  *			by calling vb2_buffer_done() with %VB2_BUF_STATE_QUEUED.
  *			If you need a minimum number of buffers before you can
  *			start streaming, then set
- *			&vb2_queue->min_buffers_needed. If that is non-zero
+ *			&vb2_queue->min_queued_buffers. If that is non-zero
  *			then @start_streaming won't be called until at least
  *			that many buffers have been queued up by userspace.
  * @stop_streaming:	called when 'streaming' state must be disabled; driver
@@ -546,10 +546,13 @@ struct vb2_buf_ops {
  * @gfp_flags:	additional gfp flags used when allocating the buffers.
  *		Typically this is 0, but it may be e.g. %GFP_DMA or %__GFP_DMA32
  *		to force the buffer allocation to a specific memory zone.
- * @min_buffers_needed: the minimum number of buffers needed before
+ * @min_queued_buffers: the minimum number of queued buffers needed before
  *		@start_streaming can be called. Used when a DMA engine
  *		cannot be started unless at least this number of buffers
  *		have been queued into the driver.
+ *		VIDIOC_REQBUFS will ensure at least @min_queued_buffers
+ *		buffers will be allocated. Note that VIDIOC_CREATE_BUFS will not
+ *		modify the requested buffer count.
  */
 /*
  * Private elements (won't appear at the uAPI book):
@@ -558,6 +561,9 @@ struct vb2_buf_ops {
  * @dma_dir:	DMA mapping direction.
  * @bufs:	videobuf2 buffer structures
  * @num_buffers: number of allocated/used buffers
+ * @max_num_buffers: upper limit of number of allocated/used buffers.
+ *		     If set to 0 v4l2 core will change it VB2_MAX_FRAME
+ *		     for backward compatibility.
  * @queued_list: list of buffers currently queued from userspace
  * @queued_count: number of buffers queued and ready for streaming.
  * @owned_by_drv_count: number of buffers owned by the driver
@@ -611,7 +617,7 @@ struct vb2_queue {
 	unsigned int			buf_struct_size;
 	u32				timestamp_flags;
 	gfp_t				gfp_flags;
-	u32				min_buffers_needed;
+	u32				min_queued_buffers;
 
 	struct device			*alloc_devs[VB2_MAX_PLANES];
 
@@ -619,8 +625,9 @@ struct vb2_queue {
 	struct mutex			mmap_lock;
 	unsigned int			memory;
 	enum dma_data_direction		dma_dir;
-	struct vb2_buffer		*bufs[VB2_MAX_FRAME];
+	struct vb2_buffer		**bufs;
 	unsigned int			num_buffers;
+	unsigned int			max_num_buffers;
 
 	struct list_head		queued_list;
 	unsigned int			queued_count;
@@ -747,7 +754,7 @@ int vb2_wait_for_all_buffers(struct vb2_queue *q);
 /**
  * vb2_core_querybuf() - query video buffer information.
  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
- * @index:	id number of the buffer.
+ * @vb:		pointer to struct &vb2_buffer.
  * @pb:		buffer struct passed from userspace.
  *
  * Videobuf2 core helper to implement VIDIOC_QUERYBUF() operation. It is called
@@ -759,7 +766,7 @@ int vb2_wait_for_all_buffers(struct vb2_queue *q);
  *
  * Return: returns zero on success; an error code otherwise.
  */
-void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb);
+void vb2_core_querybuf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb);
 
 /**
  * vb2_core_reqbufs() - Initiate streaming.
@@ -823,7 +830,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
  * vb2_core_prepare_buf() - Pass ownership of a buffer from userspace
  *			to the kernel.
  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
- * @index:	id number of the buffer.
+ * @vb:		pointer to struct &vb2_buffer.
  * @pb:		buffer structure passed from userspace to
  *		&v4l2_ioctl_ops->vidioc_prepare_buf handler in driver.
  *
@@ -839,13 +846,13 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
  *
  * Return: returns zero on success; an error code otherwise.
  */
-int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb);
+int vb2_core_prepare_buf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb);
 
 /**
  * vb2_core_qbuf() - Queue a buffer from userspace
  *
  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
- * @index:	id number of the buffer
+ * @vb:		pointer to struct &vb2_buffer.
  * @pb:		buffer structure passed from userspace to
  *		v4l2_ioctl_ops->vidioc_qbuf handler in driver
  * @req:	pointer to &struct media_request, may be NULL.
@@ -867,7 +874,7 @@ int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb);
  *
  * Return: returns zero on success; an error code otherwise.
  */
-int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb,
+int vb2_core_qbuf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb,
 		  struct media_request *req);
 
 /**
@@ -931,7 +938,7 @@ int vb2_core_streamoff(struct vb2_queue *q, unsigned int type);
  * @fd:		pointer to the file descriptor associated with DMABUF
  *		(set by driver).
  * @type:	buffer type.
- * @index:	id number of the buffer.
+ * @vb:		pointer to struct &vb2_buffer.
  * @plane:	index of the plane to be exported, 0 for single plane queues
  * @flags:	file flags for newly created file, as defined at
  *		include/uapi/asm-generic/fcntl.h.
@@ -945,7 +952,7 @@ int vb2_core_streamoff(struct vb2_queue *q, unsigned int type);
  * Return: returns zero on success; an error code otherwise.
  */
 int vb2_core_expbuf(struct vb2_queue *q, int *fd, unsigned int type,
-		unsigned int index, unsigned int plane, unsigned int flags);
+		    struct vb2_buffer *vb, unsigned int plane, unsigned int flags);
 
 /**
  * vb2_core_queue_init() - initialize a videobuf2 queue
@@ -1140,6 +1147,15 @@ static inline bool vb2_fileio_is_active(struct vb2_queue *q)
 }
 
 /**
+ * vb2_get_num_buffers() - get the number of buffer in a queue
+ * @q:		pointer to &struct vb2_queue with videobuf2 queue.
+ */
+static inline unsigned int vb2_get_num_buffers(struct vb2_queue *q)
+{
+	return q->num_buffers;
+}
+
+/**
  * vb2_is_busy() - return busy status of the queue.
  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
  *
@@ -1147,7 +1163,7 @@ static inline bool vb2_fileio_is_active(struct vb2_queue *q)
  */
 static inline bool vb2_is_busy(struct vb2_queue *q)
 {
-	return (q->num_buffers > 0);
+	return vb2_get_num_buffers(q) > 0;
 }
 
 /**
@@ -1239,6 +1255,12 @@ static inline void vb2_clear_last_buffer_dequeued(struct vb2_queue *q)
 static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q,
 						unsigned int index)
 {
+	if (!q->bufs)
+		return NULL;
+
+	if (index >= q->max_num_buffers)
+		return NULL;
+
 	if (index < q->num_buffers)
 		return q->bufs[index];
 	return NULL;
diff --git a/include/uapi/linux/thp7312.h b/include/uapi/linux/thp7312.h
new file mode 100644
index 000000000000..2b629e05daf9
--- /dev/null
+++ b/include/uapi/linux/thp7312.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
+/*
+ * THine THP7312 user space header file.
+ *
+ * Copyright (C) 2021 THine Electronics, Inc.
+ * Copyright (C) 2023 Ideas on Board Oy
+ */
+
+#ifndef __UAPI_THP7312_H_
+#define __UAPI_THP7312_H_
+
+#include <linux/v4l2-controls.h>
+
+#define V4L2_CID_THP7312_LOW_LIGHT_COMPENSATION		(V4L2_CID_USER_THP7312_BASE + 0x01)
+#define V4L2_CID_THP7312_AUTO_FOCUS_METHOD		(V4L2_CID_USER_THP7312_BASE + 0x02)
+#define V4L2_CID_THP7312_NOISE_REDUCTION_AUTO		(V4L2_CID_USER_THP7312_BASE + 0x03)
+#define V4L2_CID_THP7312_NOISE_REDUCTION_ABSOLUTE	(V4L2_CID_USER_THP7312_BASE + 0x04)
+
+#endif /* __UAPI_THP7312_H_ */
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 68db66d4aae8..99c3f5e99da7 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -209,6 +209,12 @@ enum v4l2_colorfx {
  */
 #define V4L2_CID_USER_NPCM_BASE			(V4L2_CID_USER_BASE + 0x11b0)
 
+/*
+ * The base for THine THP7312 driver controls.
+ * We reserve 32 controls for this driver.
+ */
+#define V4L2_CID_USER_THP7312_BASE		(V4L2_CID_USER_BASE + 0x11c0)
+
 /* MPEG-class control IDs */
 /* The MPEG controls are applicable to all codec controls
  * and the 'MPEG' part of the define is historical */
diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h
index b383c2fe0cf3..7048c51581c6 100644
--- a/include/uapi/linux/v4l2-subdev.h
+++ b/include/uapi/linux/v4l2-subdev.h
@@ -116,13 +116,15 @@ struct v4l2_subdev_frame_size_enum {
  * @pad: pad number, as reported by the media API
  * @interval: frame interval in seconds
  * @stream: stream number, defined in subdev routing
+ * @which: interval type (from enum v4l2_subdev_format_whence)
  * @reserved: drivers and applications must zero this array
  */
 struct v4l2_subdev_frame_interval {
 	__u32 pad;
 	struct v4l2_fract interval;
 	__u32 stream;
-	__u32 reserved[8];
+	__u32 which;
+	__u32 reserved[7];
 };
 
 /**
@@ -133,7 +135,7 @@ struct v4l2_subdev_frame_interval {
  * @width: frame width in pixels
  * @height: frame height in pixels
  * @interval: frame interval in seconds
- * @which: format type (from enum v4l2_subdev_format_whence)
+ * @which: interval type (from enum v4l2_subdev_format_whence)
  * @stream: stream number, defined in subdev routing
  * @reserved: drivers and applications must zero this array
  */
@@ -239,7 +241,14 @@ struct v4l2_subdev_routing {
  * set (which is the default), the 'stream' fields will be forced to 0 by the
  * kernel.
  */
- #define V4L2_SUBDEV_CLIENT_CAP_STREAMS		(1ULL << 0)
+#define V4L2_SUBDEV_CLIENT_CAP_STREAMS			(1ULL << 0)
+
+/*
+ * The client is aware of the struct v4l2_subdev_frame_interval which field. If
+ * this is not set (which is the default), the which field is forced to
+ * V4L2_SUBDEV_FORMAT_ACTIVE by the kernel.
+ */
+#define V4L2_SUBDEV_CLIENT_CAP_INTERVAL_USES_WHICH	(1ULL << 1)
 
 /**
  * struct v4l2_subdev_client_capability - Capabilities of the client accessing
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index c3d4e490ce7c..68e7ac178cc2 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1035,6 +1035,7 @@ struct v4l2_requestbuffers {
 #define V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS		(1 << 4)
 #define V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF	(1 << 5)
 #define V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS		(1 << 6)
+#define V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS		(1 << 7)
 
 /**
  * struct v4l2_plane - plane info for multi-planar buffers
@@ -1816,7 +1817,7 @@ struct v4l2_ext_control {
 		__s64 __user *p_s64;
 		struct v4l2_area __user *p_area;
 		struct v4l2_ctrl_h264_sps __user *p_h264_sps;
-		struct v4l2_ctrl_h264_pps *p_h264_pps;
+		struct v4l2_ctrl_h264_pps __user *p_h264_pps;
 		struct v4l2_ctrl_h264_scaling_matrix __user *p_h264_scaling_matrix;
 		struct v4l2_ctrl_h264_pred_weights __user *p_h264_pred_weights;
 		struct v4l2_ctrl_h264_slice_params __user *p_h264_slice_params;
@@ -1837,6 +1838,8 @@ struct v4l2_ext_control {
 		struct v4l2_ctrl_av1_tile_group_entry __user *p_av1_tile_group_entry;
 		struct v4l2_ctrl_av1_frame __user *p_av1_frame;
 		struct v4l2_ctrl_av1_film_grain __user *p_av1_film_grain;
+		struct v4l2_ctrl_hdr10_cll_info __user *p_hdr10_cll_info;
+		struct v4l2_ctrl_hdr10_mastering_display __user *p_hdr10_mastering_display;
 		void __user *ptr;
 	};
 } __attribute__ ((packed));
@@ -2605,6 +2608,9 @@ struct v4l2_dbg_chip_info {
  * @flags:	additional buffer management attributes (ignored unless the
  *		queue has V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS capability
  *		and configured for MMAP streaming I/O).
+ * @max_num_buffers: if V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS capability flag is set
+ *		this field indicate the maximum possible number of buffers
+ *		for this queue.
  * @reserved:	future extensions
  */
 struct v4l2_create_buffers {
@@ -2614,7 +2620,8 @@ struct v4l2_create_buffers {
 	struct v4l2_format	format;
 	__u32			capabilities;
 	__u32			flags;
-	__u32			reserved[6];
+	__u32			max_num_buffers;
+	__u32			reserved[5];
 };
 
 /*