// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vivid-osd.c - osd support for testing overlays.
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*
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* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/font.h>
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#include <linux/mutex.h>
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#include <linux/videodev2.h>
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <linux/fb.h>
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#include <media/videobuf2-vmalloc.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-event.h>
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#include <media/v4l2-common.h>
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#include "vivid-core.h"
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#include "vivid-osd.h"
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#define MAX_OSD_WIDTH 720
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#define MAX_OSD_HEIGHT 576
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/*
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* Order: white, yellow, cyan, green, magenta, red, blue, black,
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* and same again with the alpha bit set (if any)
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*/
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static const u16 rgb555[16] = {
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0x7fff, 0x7fe0, 0x03ff, 0x03e0, 0x7c1f, 0x7c00, 0x001f, 0x0000,
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0xffff, 0xffe0, 0x83ff, 0x83e0, 0xfc1f, 0xfc00, 0x801f, 0x8000
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};
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static const u16 rgb565[16] = {
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0xffff, 0xffe0, 0x07ff, 0x07e0, 0xf81f, 0xf800, 0x001f, 0x0000,
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0xffff, 0xffe0, 0x07ff, 0x07e0, 0xf81f, 0xf800, 0x001f, 0x0000
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};
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void vivid_clear_fb(struct vivid_dev *dev)
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{
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void *p = dev->video_vbase;
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const u16 *rgb = rgb555;
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unsigned x, y;
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if (dev->fb_defined.green.length == 6)
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rgb = rgb565;
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for (y = 0; y < dev->display_height; y++) {
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u16 *d = p;
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for (x = 0; x < dev->display_width; x++)
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d[x] = rgb[(y / 16 + x / 16) % 16];
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p += dev->display_byte_stride;
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}
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}
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/* --------------------------------------------------------------------- */
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static int vivid_fb_ioctl(struct fb_info *info, unsigned cmd, unsigned long arg)
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{
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struct vivid_dev *dev = (struct vivid_dev *)info->par;
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switch (cmd) {
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case FBIOGET_VBLANK: {
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struct fb_vblank vblank;
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memset(&vblank, 0, sizeof(vblank));
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vblank.flags = FB_VBLANK_HAVE_COUNT | FB_VBLANK_HAVE_VCOUNT |
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FB_VBLANK_HAVE_VSYNC;
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vblank.count = 0;
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vblank.vcount = 0;
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vblank.hcount = 0;
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if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
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return -EFAULT;
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return 0;
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}
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default:
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dprintk(dev, 1, "Unknown ioctl %08x\n", cmd);
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return -EINVAL;
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}
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return 0;
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}
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/* Framebuffer device handling */
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static int vivid_fb_set_var(struct vivid_dev *dev, struct fb_var_screeninfo *var)
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{
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dprintk(dev, 1, "vivid_fb_set_var\n");
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if (var->bits_per_pixel != 16) {
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dprintk(dev, 1, "vivid_fb_set_var - Invalid bpp\n");
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return -EINVAL;
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}
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dev->display_byte_stride = var->xres * dev->bytes_per_pixel;
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return 0;
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}
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static int vivid_fb_get_fix(struct vivid_dev *dev, struct fb_fix_screeninfo *fix)
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{
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dprintk(dev, 1, "vivid_fb_get_fix\n");
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memset(fix, 0, sizeof(struct fb_fix_screeninfo));
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strscpy(fix->id, "vioverlay fb", sizeof(fix->id));
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fix->smem_start = dev->video_pbase;
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fix->smem_len = dev->video_buffer_size;
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fix->type = FB_TYPE_PACKED_PIXELS;
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fix->visual = FB_VISUAL_TRUECOLOR;
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fix->xpanstep = 1;
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fix->ypanstep = 1;
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fix->ywrapstep = 0;
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fix->line_length = dev->display_byte_stride;
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fix->accel = FB_ACCEL_NONE;
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return 0;
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}
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/* Check the requested display mode, returning -EINVAL if we can't
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handle it. */
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static int _vivid_fb_check_var(struct fb_var_screeninfo *var, struct vivid_dev *dev)
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{
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dprintk(dev, 1, "vivid_fb_check_var\n");
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var->bits_per_pixel = 16;
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if (var->green.length == 5) {
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var->red.offset = 10;
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var->red.length = 5;
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var->green.offset = 5;
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var->green.length = 5;
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var->blue.offset = 0;
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var->blue.length = 5;
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var->transp.offset = 15;
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var->transp.length = 1;
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} else {
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var->red.offset = 11;
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var->red.length = 5;
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var->green.offset = 5;
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var->green.length = 6;
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var->blue.offset = 0;
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var->blue.length = 5;
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var->transp.offset = 0;
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var->transp.length = 0;
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}
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var->xoffset = var->yoffset = 0;
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var->left_margin = var->upper_margin = 0;
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var->nonstd = 0;
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var->vmode &= ~FB_VMODE_MASK;
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var->vmode |= FB_VMODE_NONINTERLACED;
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/* Dummy values */
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var->hsync_len = 24;
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var->vsync_len = 2;
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var->pixclock = 84316;
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var->right_margin = 776;
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var->lower_margin = 591;
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return 0;
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}
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static int vivid_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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struct vivid_dev *dev = (struct vivid_dev *) info->par;
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dprintk(dev, 1, "vivid_fb_check_var\n");
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return _vivid_fb_check_var(var, dev);
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}
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static int vivid_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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return 0;
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}
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static int vivid_fb_set_par(struct fb_info *info)
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{
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int rc = 0;
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struct vivid_dev *dev = (struct vivid_dev *) info->par;
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dprintk(dev, 1, "vivid_fb_set_par\n");
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rc = vivid_fb_set_var(dev, &info->var);
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vivid_fb_get_fix(dev, &info->fix);
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return rc;
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}
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static int vivid_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info)
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{
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u32 color, *palette;
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if (regno >= info->cmap.len)
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return -EINVAL;
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color = ((transp & 0xFF00) << 16) | ((red & 0xFF00) << 8) |
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(green & 0xFF00) | ((blue & 0xFF00) >> 8);
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if (regno >= 16)
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return -EINVAL;
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palette = info->pseudo_palette;
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if (info->var.bits_per_pixel == 16) {
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switch (info->var.green.length) {
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case 6:
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color = (red & 0xf800) |
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((green & 0xfc00) >> 5) |
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((blue & 0xf800) >> 11);
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break;
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case 5:
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color = ((red & 0xf800) >> 1) |
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((green & 0xf800) >> 6) |
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((blue & 0xf800) >> 11) |
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(transp ? 0x8000 : 0);
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break;
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}
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}
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palette[regno] = color;
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return 0;
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}
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/* We don't really support blanking. All this does is enable or
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disable the OSD. */
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static int vivid_fb_blank(int blank_mode, struct fb_info *info)
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{
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struct vivid_dev *dev = (struct vivid_dev *)info->par;
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dprintk(dev, 1, "Set blanking mode : %d\n", blank_mode);
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switch (blank_mode) {
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case FB_BLANK_UNBLANK:
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break;
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case FB_BLANK_NORMAL:
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case FB_BLANK_HSYNC_SUSPEND:
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case FB_BLANK_VSYNC_SUSPEND:
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case FB_BLANK_POWERDOWN:
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break;
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}
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return 0;
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}
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static const struct fb_ops vivid_fb_ops = {
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.owner = THIS_MODULE,
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.fb_check_var = vivid_fb_check_var,
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.fb_set_par = vivid_fb_set_par,
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.fb_setcolreg = vivid_fb_setcolreg,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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.fb_cursor = NULL,
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.fb_ioctl = vivid_fb_ioctl,
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.fb_pan_display = vivid_fb_pan_display,
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.fb_blank = vivid_fb_blank,
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};
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/* Initialization */
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/* Setup our initial video mode */
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static int vivid_fb_init_vidmode(struct vivid_dev *dev)
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{
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struct v4l2_rect start_window;
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/* Color mode */
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dev->bits_per_pixel = 16;
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dev->bytes_per_pixel = dev->bits_per_pixel / 8;
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start_window.width = MAX_OSD_WIDTH;
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start_window.left = 0;
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dev->display_byte_stride = start_window.width * dev->bytes_per_pixel;
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/* Vertical size & position */
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start_window.height = MAX_OSD_HEIGHT;
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start_window.top = 0;
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dev->display_width = start_window.width;
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dev->display_height = start_window.height;
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/* Generate a valid fb_var_screeninfo */
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dev->fb_defined.xres = dev->display_width;
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dev->fb_defined.yres = dev->display_height;
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dev->fb_defined.xres_virtual = dev->display_width;
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dev->fb_defined.yres_virtual = dev->display_height;
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dev->fb_defined.bits_per_pixel = dev->bits_per_pixel;
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dev->fb_defined.vmode = FB_VMODE_NONINTERLACED;
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dev->fb_defined.left_margin = start_window.left + 1;
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dev->fb_defined.upper_margin = start_window.top + 1;
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dev->fb_defined.accel_flags = FB_ACCEL_NONE;
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dev->fb_defined.nonstd = 0;
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/* set default to 1:5:5:5 */
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dev->fb_defined.green.length = 5;
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/* We've filled in the most data, let the usual mode check
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routine fill in the rest. */
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_vivid_fb_check_var(&dev->fb_defined, dev);
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/* Generate valid fb_fix_screeninfo */
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vivid_fb_get_fix(dev, &dev->fb_fix);
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/* Generate valid fb_info */
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dev->fb_info.node = -1;
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dev->fb_info.flags = FBINFO_FLAG_DEFAULT;
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dev->fb_info.par = dev;
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dev->fb_info.var = dev->fb_defined;
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dev->fb_info.fix = dev->fb_fix;
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dev->fb_info.screen_base = (u8 __iomem *)dev->video_vbase;
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dev->fb_info.fbops = &vivid_fb_ops;
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/* Supply some monitor specs. Bogus values will do for now */
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dev->fb_info.monspecs.hfmin = 8000;
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dev->fb_info.monspecs.hfmax = 70000;
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dev->fb_info.monspecs.vfmin = 10;
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dev->fb_info.monspecs.vfmax = 100;
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/* Allocate color map */
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if (fb_alloc_cmap(&dev->fb_info.cmap, 256, 1)) {
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pr_err("abort, unable to alloc cmap\n");
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return -ENOMEM;
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}
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/* Allocate the pseudo palette */
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dev->fb_info.pseudo_palette = kmalloc_array(16, sizeof(u32), GFP_KERNEL);
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return dev->fb_info.pseudo_palette ? 0 : -ENOMEM;
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}
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/* Release any memory we've grabbed */
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void vivid_fb_release_buffers(struct vivid_dev *dev)
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{
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if (dev->video_vbase == NULL)
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return;
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/* Release cmap */
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if (dev->fb_info.cmap.len)
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fb_dealloc_cmap(&dev->fb_info.cmap);
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/* Release pseudo palette */
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kfree(dev->fb_info.pseudo_palette);
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kfree(dev->video_vbase);
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}
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/* Initialize the specified card */
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int vivid_fb_init(struct vivid_dev *dev)
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{
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int ret;
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dev->video_buffer_size = MAX_OSD_HEIGHT * MAX_OSD_WIDTH * 2;
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dev->video_vbase = kzalloc(dev->video_buffer_size, GFP_KERNEL | GFP_DMA32);
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if (dev->video_vbase == NULL)
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return -ENOMEM;
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dev->video_pbase = virt_to_phys(dev->video_vbase);
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pr_info("Framebuffer at 0x%lx, mapped to 0x%p, size %dk\n",
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dev->video_pbase, dev->video_vbase,
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dev->video_buffer_size / 1024);
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/* Set the startup video mode information */
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ret = vivid_fb_init_vidmode(dev);
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if (ret) {
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vivid_fb_release_buffers(dev);
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return ret;
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}
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vivid_clear_fb(dev);
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/* Register the framebuffer */
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if (register_framebuffer(&dev->fb_info) < 0) {
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vivid_fb_release_buffers(dev);
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return -EINVAL;
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}
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/* Set the card to the requested mode */
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vivid_fb_set_par(&dev->fb_info);
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return 0;
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}
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