mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 02:51:00 +00:00
77debf61ef
Add a new function to activate an existing simple frame buffer node and add the associated reserved memory, with no-map properties. This device tree update is only done when the video device is active and the video buffer is used. This patch uses '#if CONFIG_IS_ENABLED(DM_VIDEO)' because gd->video_bottom and gd->video_top are only defined when CONFIG_DM_VIDEO is activated. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Simplefb device tree support
|
|
*
|
|
* (C) Copyright 2015
|
|
* Stephen Warren <swarren@wwwdotorg.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <lcd.h>
|
|
#include <fdt_support.h>
|
|
#include <asm/global_data.h>
|
|
#include <linux/libfdt.h>
|
|
#include <video.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static int fdt_simplefb_configure_node(void *blob, int off)
|
|
{
|
|
int xsize, ysize;
|
|
int bpix; /* log2 of bits per pixel */
|
|
const char *name;
|
|
ulong fb_base;
|
|
#ifdef CONFIG_DM_VIDEO
|
|
struct video_uc_plat *plat;
|
|
struct video_priv *uc_priv;
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
|
|
if (ret)
|
|
return ret;
|
|
uc_priv = dev_get_uclass_priv(dev);
|
|
plat = dev_get_uclass_plat(dev);
|
|
xsize = uc_priv->xsize;
|
|
ysize = uc_priv->ysize;
|
|
bpix = uc_priv->bpix;
|
|
fb_base = plat->base;
|
|
#else
|
|
xsize = lcd_get_pixel_width();
|
|
ysize = lcd_get_pixel_height();
|
|
bpix = LCD_BPP;
|
|
fb_base = gd->fb_base;
|
|
#endif
|
|
switch (bpix) {
|
|
case 4: /* VIDEO_BPP16 */
|
|
name = "r5g6b5";
|
|
break;
|
|
case 5: /* VIDEO_BPP32 */
|
|
name = "a8r8g8b8";
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return fdt_setup_simplefb_node(blob, off, fb_base, xsize, ysize,
|
|
xsize * (1 << bpix) / 8, name);
|
|
}
|
|
|
|
int fdt_simplefb_add_node(void *blob)
|
|
{
|
|
static const char compat[] = "simple-framebuffer";
|
|
static const char disabled[] = "disabled";
|
|
int off, ret;
|
|
|
|
off = fdt_add_subnode(blob, 0, "framebuffer");
|
|
if (off < 0)
|
|
return -1;
|
|
|
|
ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
return fdt_simplefb_configure_node(blob, off);
|
|
}
|
|
|
|
int fdt_simplefb_enable_existing_node(void *blob)
|
|
{
|
|
int off;
|
|
|
|
off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
|
|
if (off < 0)
|
|
return -1;
|
|
|
|
return fdt_simplefb_configure_node(blob, off);
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(DM_VIDEO)
|
|
int fdt_simplefb_enable_and_mem_rsv(void *blob)
|
|
{
|
|
struct fdt_memory mem;
|
|
int ret;
|
|
|
|
/* nothing to do when video is not active */
|
|
if (!video_is_active())
|
|
return 0;
|
|
|
|
ret = fdt_simplefb_enable_existing_node(blob);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* nothing to do when the frame buffer is not defined */
|
|
if (gd->video_bottom == gd->video_top)
|
|
return 0;
|
|
|
|
/* reserved with no-map tag the video buffer */
|
|
mem.start = gd->video_bottom;
|
|
mem.end = gd->video_top - 1;
|
|
|
|
return fdtdec_add_reserved_memory(blob, "framebuffer", &mem, NULL, 0, NULL,
|
|
FDTDEC_RESERVED_MEMORY_NO_MAP);
|
|
}
|
|
#endif
|