iss_resizer.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0+
/*
 * TI OMAP4 ISS V4L2 Driver - ISP RESIZER module
 *
 * Copyright (C) 2012 Texas Instruments, Inc.
 *
 * Author: Sergio Aguirre <[email protected]>
 */

#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/sched.h>

#include "iss.h"
#include "iss_regs.h"
#include "iss_resizer.h"

static const unsigned int resizer_fmts[] = …;

/*
 * resizer_print_status - Print current RESIZER Module register values.
 * @resizer: Pointer to ISS ISP RESIZER device.
 *
 * Also prints other debug information stored in the RESIZER module.
 */
#define RSZ_PRINT_REGISTER(iss, name) …

#define RZA_PRINT_REGISTER(iss, name) …

static void resizer_print_status(struct iss_resizer_device *resizer)
{ … }

/*
 * resizer_enable - Enable/Disable RESIZER.
 * @enable: enable flag
 *
 */
static void resizer_enable(struct iss_resizer_device *resizer, u8 enable)
{ … }

/* -----------------------------------------------------------------------------
 * Format- and pipeline-related configuration helpers
 */

/*
 * resizer_set_outaddr - Set memory address to save output image
 * @resizer: Pointer to ISP RESIZER device.
 * @addr: 32-bit memory address aligned on 32 byte boundary.
 *
 * Sets the memory address where the output will be saved.
 */
static void resizer_set_outaddr(struct iss_resizer_device *resizer, u32 addr)
{ … }

static void resizer_configure(struct iss_resizer_device *resizer)
{ … }

/* -----------------------------------------------------------------------------
 * Interrupt handling
 */

static void resizer_isr_buffer(struct iss_resizer_device *resizer)
{ … }

/*
 * omap4iss_resizer_isr - Configure resizer during interframe time.
 * @resizer: Pointer to ISP RESIZER device.
 * @events: RESIZER events
 */
void omap4iss_resizer_isr(struct iss_resizer_device *resizer, u32 events)
{ … }

/* -----------------------------------------------------------------------------
 * ISS video operations
 */

static int resizer_video_queue(struct iss_video *video,
			       struct iss_buffer *buffer)
{ … }

static const struct iss_video_operations resizer_video_ops = …;

/* -----------------------------------------------------------------------------
 * V4L2 subdev operations
 */

/*
 * resizer_set_stream - Enable/Disable streaming on the RESIZER module
 * @sd: ISP RESIZER V4L2 subdevice
 * @enable: Enable/disable stream
 */
static int resizer_set_stream(struct v4l2_subdev *sd, int enable)
{ … }

static struct v4l2_mbus_framefmt *
__resizer_get_format(struct iss_resizer_device *resizer,
		     struct v4l2_subdev_state *sd_state, unsigned int pad,
		     enum v4l2_subdev_format_whence which)
{ … }

/*
 * resizer_try_format - Try video format on a pad
 * @resizer: ISS RESIZER device
 * @sd_state: V4L2 subdev state
 * @pad: Pad number
 * @fmt: Format
 */
static void
resizer_try_format(struct iss_resizer_device *resizer,
		   struct v4l2_subdev_state *sd_state, unsigned int pad,
		   struct v4l2_mbus_framefmt *fmt,
		   enum v4l2_subdev_format_whence which)
{ … }

/*
 * resizer_enum_mbus_code - Handle pixel format enumeration
 * @sd     : pointer to v4l2 subdev structure
 * @sd_state: V4L2 subdev state
 * @code   : pointer to v4l2_subdev_mbus_code_enum structure
 * return -EINVAL or zero on success
 */
static int resizer_enum_mbus_code(struct v4l2_subdev *sd,
				  struct v4l2_subdev_state *sd_state,
				  struct v4l2_subdev_mbus_code_enum *code)
{ … }

static int resizer_enum_frame_size(struct v4l2_subdev *sd,
				   struct v4l2_subdev_state *sd_state,
				   struct v4l2_subdev_frame_size_enum *fse)
{ … }

/*
 * resizer_get_format - Retrieve the video format on a pad
 * @sd : ISP RESIZER V4L2 subdevice
 * @sd_state: V4L2 subdev state
 * @fmt: Format
 *
 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 * to the format type.
 */
static int resizer_get_format(struct v4l2_subdev *sd,
			      struct v4l2_subdev_state *sd_state,
			      struct v4l2_subdev_format *fmt)
{ … }

/*
 * resizer_set_format - Set the video format on a pad
 * @sd : ISP RESIZER V4L2 subdevice
 * @sd_state: V4L2 subdev state
 * @fmt: Format
 *
 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 * to the format type.
 */
static int resizer_set_format(struct v4l2_subdev *sd,
			      struct v4l2_subdev_state *sd_state,
			      struct v4l2_subdev_format *fmt)
{ … }

static int resizer_link_validate(struct v4l2_subdev *sd,
				 struct media_link *link,
				 struct v4l2_subdev_format *source_fmt,
				 struct v4l2_subdev_format *sink_fmt)
{ … }

/*
 * resizer_init_formats - Initialize formats on all pads
 * @sd: ISP RESIZER V4L2 subdevice
 * @fh: V4L2 subdev file handle
 *
 * Initialize all pad formats with default values. If fh is not NULL, try
 * formats are initialized on the file handle. Otherwise active formats are
 * initialized on the device.
 */
static int resizer_init_formats(struct v4l2_subdev *sd,
				struct v4l2_subdev_fh *fh)
{ … }

/* V4L2 subdev video operations */
static const struct v4l2_subdev_video_ops resizer_v4l2_video_ops = …;

/* V4L2 subdev pad operations */
static const struct v4l2_subdev_pad_ops resizer_v4l2_pad_ops = …;

/* V4L2 subdev operations */
static const struct v4l2_subdev_ops resizer_v4l2_ops = …;

/* V4L2 subdev internal operations */
static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = …;

/* -----------------------------------------------------------------------------
 * Media entity operations
 */

/*
 * resizer_link_setup - Setup RESIZER connections
 * @entity: RESIZER media entity
 * @local: Pad at the local end of the link
 * @remote: Pad at the remote end of the link
 * @flags: Link flags
 *
 * return -EINVAL or zero on success
 */
static int resizer_link_setup(struct media_entity *entity,
			      const struct media_pad *local,
			      const struct media_pad *remote, u32 flags)
{ … }

/* media operations */
static const struct media_entity_operations resizer_media_ops = …;

/*
 * resizer_init_entities - Initialize V4L2 subdev and media entity
 * @resizer: ISS ISP RESIZER module
 *
 * Return 0 on success and a negative error code on failure.
 */
static int resizer_init_entities(struct iss_resizer_device *resizer)
{ … }

void omap4iss_resizer_unregister_entities(struct iss_resizer_device *resizer)
{ … }

int omap4iss_resizer_register_entities(struct iss_resizer_device *resizer,
				       struct v4l2_device *vdev)
{ … }

/* -----------------------------------------------------------------------------
 * ISP RESIZER initialisation and cleanup
 */

/*
 * omap4iss_resizer_init - RESIZER module initialization.
 * @iss: Device pointer specific to the OMAP4 ISS.
 *
 * TODO: Get the initialisation values from platform data.
 *
 * Return 0 on success or a negative error code otherwise.
 */
int omap4iss_resizer_init(struct iss_device *iss)
{ … }

/*
 * omap4iss_resizer_create_links() - RESIZER pads links creation
 * @iss: Pointer to ISS device
 *
 * return negative error code or zero on success
 */
int omap4iss_resizer_create_links(struct iss_device *iss)
{ … }

/*
 * omap4iss_resizer_cleanup - RESIZER module cleanup.
 * @iss: Device pointer specific to the OMAP4 ISS.
 */
void omap4iss_resizer_cleanup(struct iss_device *iss)
{ … }
linux/drivers/staging/media/omap4iss/iss_resizer.c
