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/*
* (C) Copyright 2017 Rob Clark
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <fdt_support.h>
#include <video.h>
static int simple_video_probe(struct udevice *dev)
{
struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
const void *blob = gd->fdt_blob;
const int node = dev_of_offset(dev);
const char *format;
fdt_addr_t base;
fdt_size_t size;
base = fdtdec_get_addr_size_auto_parent(blob, dev_of_offset(dev->parent),
node, "reg", 0, &size, false);
if (base == FDT_ADDR_T_NONE) {
debug("%s: Failed to decode memory region\n", __func__);
return -EINVAL;
}
debug("%s: base=%llx, size=%llu\n", __func__, base, size);
/*
* TODO is there some way to reserve the framebuffer
* region so it isn't clobbered?
*/
plat->base = base;
plat->size = size;
video_set_flush_dcache(dev, true);
debug("%s: Query resolution...\n", __func__);
uc_priv->xsize = fdtdec_get_uint(blob, node, "width", 0);
uc_priv->ysize = fdtdec_get_uint(blob, node, "height", 0);
uc_priv->rot = 0;
format = fdt_getprop(blob, node, "format", NULL);
debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format);
if (strcmp(format, "r5g6b5") == 0) {
uc_priv->bpix = VIDEO_BPP16;
} else if (strcmp(format, "a8b8g8r8") == 0) {
uc_priv->bpix = VIDEO_BPP32;
} else {
printf("%s: invalid format: %s\n", __func__, format);
return -EINVAL;
}
return 0;
}
static const struct udevice_id simple_video_ids[] = {
{ .compatible = "simple-framebuffer" },
{ }
};
U_BOOT_DRIVER(simple_video) = {
.name = "simple_video",
.id = UCLASS_VIDEO,
.of_match = simple_video_ids,
.probe = simple_video_probe,
.flags = DM_FLAG_PRE_RELOC,
};
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