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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2017 Rob Clark
*/
#include <dm.h>
#include <fdtdec.h>
#include <fdt_support.h>
#include <log.h>
#include <video.h>
#include <asm/global_data.h>
static int simple_video_probe(struct udevice *dev)
{
struct video_uc_plat *plat = dev_get_uclass_plat(dev);
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
ofnode node = dev_ofnode(dev);
const char *format;
int ret;
fdt_addr_t base;
fdt_size_t size;
u32 width, height, rot;
base = dev_read_addr_size(dev, &size);
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__);
ret = ofnode_read_u32(node, "width", &width);
ret = ret ?: ofnode_read_u32(node, "height", &height);
if (ret || !width || !height) {
log_err("%s: invalid width or height: %d\n", __func__, ret);
return ret ?: -EINVAL;
}
ofnode_read_u32(node, "rot", &rot);
uc_priv->rot = rot;
uc_priv->xsize = width;
uc_priv->ysize = height;
format = ofnode_read_string(node, "format");
debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format);
if (!format) {
log_err("%s: please add required property \"format\"\n", __func__);
return -EINVAL;
}
if (strcmp(format, "r5g6b5") == 0) {
uc_priv->bpix = VIDEO_BPP16;
} else if (strcmp(format, "a8b8g8r8") == 0 ||
strcmp(format, "x8b8g8r8") == 0) {
uc_priv->bpix = VIDEO_BPP32;
uc_priv->format = VIDEO_X8B8G8R8;
} else if (strcmp(format, "a8r8g8b8") == 0 ||
strcmp(format, "x8r8g8b8") == 0) {
uc_priv->bpix = VIDEO_BPP32;
uc_priv->format = VIDEO_X8R8G8B8;
} else if (strcmp(format, "a2r10g10b10") == 0 ||
strcmp(format, "x2r10g10b10") == 0) {
uc_priv->bpix = VIDEO_BPP32;
uc_priv->format = VIDEO_X2R10G10B10;
} else {
log_err("%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,
};
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