linux/drivers/media/test-drivers/vivid/vivid-osd.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * vivid-osd.c - osd support for testing overlays.
 *
 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/font.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/fb.h>
#include <media/videobuf2-vmalloc.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-common.h>

#include "vivid-core.h"
#include "vivid-osd.h"

#define MAX_OSD_WIDTH …
#define MAX_OSD_HEIGHT …

/*
 * Order: white, yellow, cyan, green, magenta, red, blue, black,
 * and same again with the alpha bit set (if any)
 */
static const u16 rgb555[16] = …;

static const u16 rgb565[16] = …;

void vivid_clear_fb(struct vivid_dev *dev)
{ … }

/* --------------------------------------------------------------------- */

static int vivid_fb_ioctl(struct fb_info *info, unsigned cmd, unsigned long arg)
{ … }

/* Framebuffer device handling */

static int vivid_fb_set_var(struct vivid_dev *dev, struct fb_var_screeninfo *var)
{ … }

static int vivid_fb_get_fix(struct vivid_dev *dev, struct fb_fix_screeninfo *fix)
{ … }

/* Check the requested display mode, returning -EINVAL if we can't
   handle it. */

static int _vivid_fb_check_var(struct fb_var_screeninfo *var, struct vivid_dev *dev)
{ … }

static int vivid_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{ … }

static int vivid_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{ … }

static int vivid_fb_set_par(struct fb_info *info)
{ … }

static int vivid_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
				unsigned blue, unsigned transp,
				struct fb_info *info)
{ … }

/* We don't really support blanking. All this does is enable or
   disable the OSD. */
static int vivid_fb_blank(int blank_mode, struct fb_info *info)
{ … }

static const struct fb_ops vivid_fb_ops = …;

/* Initialization */


/* Setup our initial video mode */
static int vivid_fb_init_vidmode(struct vivid_dev *dev)
{ … }

/* Release any memory we've grabbed */
void vivid_fb_release_buffers(struct vivid_dev *dev)
{ … }

/* Initialize the specified card */

int vivid_fb_init(struct vivid_dev *dev)
{ … }