forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
linux-pinenote/drivers/media/platform/vivid/vivid-osd.c
Hans Verkuil ad4e02d508 [media] vivid: add a simple framebuffer device for overlay testing 
In order to test capture and output overlays a simple framebuffer
device is created. It's bare bone, but it does the job.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-09-02 17:42:53 -03:00

400 lines
10 KiB
C
Raw Blame History

/*
* vivid-osd.c - osd support for testing overlays.
*
* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#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 720
#define MAX_OSD_HEIGHT 576
/*
* Order: white, yellow, cyan, green, magenta, red, blue, black,
* and same again with the alpha bit set (if any)
*/
static const u16 rgb555[16] = {
0x7fff, 0x7fe0, 0x03ff, 0x03e0, 0x7c1f, 0x7c00, 0x001f, 0x0000,
0xffff, 0xffe0, 0x83ff, 0x83e0, 0xfc1f, 0xfc00, 0x801f, 0x8000
};
static const u16 rgb565[16] = {
0xffff, 0xffe0, 0x07ff, 0x07e0, 0xf81f, 0xf800, 0x001f, 0x0000,
0xffff, 0xffe0, 0x07ff, 0x07e0, 0xf81f, 0xf800, 0x001f, 0x0000
};
void vivid_clear_fb(struct vivid_dev *dev)
{
void *p = dev->video_vbase;
const u16 *rgb = rgb555;
unsigned x, y;
if (dev->fb_defined.green.length == 6)
rgb = rgb565;
for (y = 0; y < dev->display_height; y++) {
u16 *d = p;
for (x = 0; x < dev->display_width; x++)
d[x] = rgb[(y / 16 + x / 16) % 16];
p += dev->display_byte_stride;
}
}
/* --------------------------------------------------------------------- */
static int vivid_fb_ioctl(struct fb_info *info, unsigned cmd, unsigned long arg)
{
struct vivid_dev *dev = (struct vivid_dev *)info->par;
switch (cmd) {
case FBIOGET_VBLANK: {
struct fb_vblank vblank;
vblank.flags = FB_VBLANK_HAVE_COUNT | FB_VBLANK_HAVE_VCOUNT |
FB_VBLANK_HAVE_VSYNC;
vblank.count = 0;
vblank.vcount = 0;
vblank.hcount = 0;
if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
return -EFAULT;
return 0;
}
default:
dprintk(dev, 1, "Unknown ioctl %08x\n", cmd);
return -EINVAL;
}
return 0;
}
/* Framebuffer device handling */
static int vivid_fb_set_var(struct vivid_dev *dev, struct fb_var_screeninfo *var)
{
dprintk(dev, 1, "vivid_fb_set_var\n");
if (var->bits_per_pixel != 16) {
dprintk(dev, 1, "vivid_fb_set_var - Invalid bpp\n");
return -EINVAL;
}
dev->display_byte_stride = var->xres * dev->bytes_per_pixel;
return 0;
}
static int vivid_fb_get_fix(struct vivid_dev *dev, struct fb_fix_screeninfo *fix)
{
dprintk(dev, 1, "vivid_fb_get_fix\n");
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
strlcpy(fix->id, "vioverlay fb", sizeof(fix->id));
fix->smem_start = dev->video_pbase;
fix->smem_len = dev->video_buffer_size;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->visual = FB_VISUAL_TRUECOLOR;
fix->xpanstep = 1;
fix->ypanstep = 1;
fix->ywrapstep = 0;
fix->line_length = dev->display_byte_stride;
fix->accel = FB_ACCEL_NONE;
return 0;
}
/* 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)
{
dprintk(dev, 1, "vivid_fb_check_var\n");
var->bits_per_pixel = 16;
if (var->green.length == 5) {
var->red.offset = 10;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 5;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 15;
var->transp.length = 1;
} else {
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 6;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
}
var->xoffset = var->yoffset = 0;
var->left_margin = var->upper_margin = 0;
var->nonstd = 0;
var->vmode &= ~FB_VMODE_MASK;
var->vmode = FB_VMODE_NONINTERLACED;
/* Dummy values */
var->hsync_len = 24;
var->vsync_len = 2;
var->pixclock = 84316;
var->right_margin = 776;
var->lower_margin = 591;
return 0;
}
static int vivid_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct vivid_dev *dev = (struct vivid_dev *) info->par;
dprintk(dev, 1, "vivid_fb_check_var\n");
return _vivid_fb_check_var(var, dev);
}
static int vivid_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
return 0;
}
static int vivid_fb_set_par(struct fb_info *info)
{
int rc = 0;
struct vivid_dev *dev = (struct vivid_dev *) info->par;
dprintk(dev, 1, "vivid_fb_set_par\n");
rc = vivid_fb_set_var(dev, &info->var);
vivid_fb_get_fix(dev, &info->fix);
return rc;
}
static int vivid_fb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
u32 color, *palette;
if (regno >= info->cmap.len)
return -EINVAL;
color = ((transp & 0xFF00) << 16) | ((red & 0xFF00) << 8) |
(green & 0xFF00) | ((blue & 0xFF00) >> 8);
if (regno >= 16)
return -EINVAL;
palette = info->pseudo_palette;
if (info->var.bits_per_pixel == 16) {
switch (info->var.green.length) {
case 6:
color = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
break;
case 5:
color = ((red & 0xf800) >> 1) |
((green & 0xf800) >> 6) |
((blue & 0xf800) >> 11) |
(transp ? 0x8000 : 0);
break;
}
}
palette[regno] = color;
return 0;
}
/* 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)
{
struct vivid_dev *dev = (struct vivid_dev *)info->par;
dprintk(dev, 1, "Set blanking mode : %d\n", blank_mode);
switch (blank_mode) {
case FB_BLANK_UNBLANK:
break;
case FB_BLANK_NORMAL:
case FB_BLANK_HSYNC_SUSPEND:
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_POWERDOWN:
break;
}
return 0;
}
static struct fb_ops vivid_fb_ops = {
.owner = THIS_MODULE,
.fb_check_var = vivid_fb_check_var,
.fb_set_par = vivid_fb_set_par,
.fb_setcolreg = vivid_fb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_cursor = NULL,
.fb_ioctl = vivid_fb_ioctl,
.fb_pan_display = vivid_fb_pan_display,
.fb_blank = vivid_fb_blank,
};
/* Initialization */
/* Setup our initial video mode */
static int vivid_fb_init_vidmode(struct vivid_dev *dev)
{
struct v4l2_rect start_window;
/* Color mode */
dev->bits_per_pixel = 16;
dev->bytes_per_pixel = dev->bits_per_pixel / 8;
start_window.width = MAX_OSD_WIDTH;
start_window.left = 0;
dev->display_byte_stride = start_window.width * dev->bytes_per_pixel;
/* Vertical size & position */
start_window.height = MAX_OSD_HEIGHT;
start_window.top = 0;
dev->display_width = start_window.width;
dev->display_height = start_window.height;
/* Generate a valid fb_var_screeninfo */
dev->fb_defined.xres = dev->display_width;
dev->fb_defined.yres = dev->display_height;
dev->fb_defined.xres_virtual = dev->display_width;
dev->fb_defined.yres_virtual = dev->display_height;
dev->fb_defined.bits_per_pixel = dev->bits_per_pixel;
dev->fb_defined.vmode = FB_VMODE_NONINTERLACED;
dev->fb_defined.left_margin = start_window.left + 1;
dev->fb_defined.upper_margin = start_window.top + 1;
dev->fb_defined.accel_flags = FB_ACCEL_NONE;
dev->fb_defined.nonstd = 0;
/* set default to 1:5:5:5 */
dev->fb_defined.green.length = 5;
/* We've filled in the most data, let the usual mode check
routine fill in the rest. */
_vivid_fb_check_var(&dev->fb_defined, dev);
/* Generate valid fb_fix_screeninfo */
vivid_fb_get_fix(dev, &dev->fb_fix);
/* Generate valid fb_info */
dev->fb_info.node = -1;
dev->fb_info.flags = FBINFO_FLAG_DEFAULT;
dev->fb_info.fbops = &vivid_fb_ops;
dev->fb_info.par = dev;
dev->fb_info.var = dev->fb_defined;
dev->fb_info.fix = dev->fb_fix;
dev->fb_info.screen_base = (u8 __iomem *)dev->video_vbase;
dev->fb_info.fbops = &vivid_fb_ops;
/* Supply some monitor specs. Bogus values will do for now */
dev->fb_info.monspecs.hfmin = 8000;
dev->fb_info.monspecs.hfmax = 70000;
dev->fb_info.monspecs.vfmin = 10;
dev->fb_info.monspecs.vfmax = 100;
/* Allocate color map */
if (fb_alloc_cmap(&dev->fb_info.cmap, 256, 1)) {
pr_err("abort, unable to alloc cmap\n");
return -ENOMEM;
}
/* Allocate the pseudo palette */
dev->fb_info.pseudo_palette = kmalloc_array(16, sizeof(u32), GFP_KERNEL);
return dev->fb_info.pseudo_palette ? 0 : -ENOMEM;
}
/* Release any memory we've grabbed */
void vivid_fb_release_buffers(struct vivid_dev *dev)
{
if (dev->video_vbase == NULL)
return;
/* Release cmap */
if (dev->fb_info.cmap.len)
fb_dealloc_cmap(&dev->fb_info.cmap);
/* Release pseudo palette */
kfree(dev->fb_info.pseudo_palette);
kfree((void *)dev->video_vbase);
}
/* Initialize the specified card */
int vivid_fb_init(struct vivid_dev *dev)
{
int ret;
dev->video_buffer_size = MAX_OSD_HEIGHT * MAX_OSD_WIDTH * 2;
dev->video_vbase = kzalloc(dev->video_buffer_size, GFP_KERNEL | GFP_DMA32);
if (dev->video_vbase == NULL)
return -ENOMEM;
dev->video_pbase = virt_to_phys(dev->video_vbase);
pr_info("Framebuffer at 0x%lx, mapped to 0x%p, size %dk\n",
dev->video_pbase, dev->video_vbase,
dev->video_buffer_size / 1024);
/* Set the startup video mode information */
ret = vivid_fb_init_vidmode(dev);
if (ret) {
vivid_fb_release_buffers(dev);
return ret;
}
vivid_clear_fb(dev);
/* Register the framebuffer */
if (register_framebuffer(&dev->fb_info) < 0) {
vivid_fb_release_buffers(dev);
return -EINVAL;
}
/* Set the card to the requested mode */
vivid_fb_set_par(&dev->fb_info);
return 0;
}
Reference in a new issue View git blame Copy permalink