2 * (C) Copyright 2017 Rob Clark
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <fdt_support.h>
13 static int simple_video_probe(struct udevice *dev)
15 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
16 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
17 const void *blob = gd->fdt_blob;
18 const int node = dev_of_offset(dev);
23 base = fdtdec_get_addr_size_auto_parent(blob, dev_of_offset(dev->parent),
24 node, "reg", 0, &size, false);
25 if (base == FDT_ADDR_T_NONE) {
26 debug("%s: Failed to decode memory region\n", __func__);
30 debug("%s: base=%llx, size=%llu\n", __func__, base, size);
33 * TODO is there some way to reserve the framebuffer
34 * region so it isn't clobbered?
39 video_set_flush_dcache(dev, true);
41 debug("%s: Query resolution...\n", __func__);
43 uc_priv->xsize = fdtdec_get_uint(blob, node, "width", 0);
44 uc_priv->ysize = fdtdec_get_uint(blob, node, "height", 0);
47 format = fdt_getprop(blob, node, "format", NULL);
48 debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format);
50 if (strcmp(format, "r5g6b5") == 0) {
51 uc_priv->bpix = VIDEO_BPP16;
52 } else if (strcmp(format, "a8b8g8r8") == 0) {
53 uc_priv->bpix = VIDEO_BPP32;
55 printf("%s: invalid format: %s\n", __func__, format);
62 static const struct udevice_id simple_video_ids[] = {
63 { .compatible = "simple-framebuffer" },
67 U_BOOT_DRIVER(simple_video) = {
68 .name = "simple_video",
70 .of_match = simple_video_ids,
71 .probe = simple_video_probe,
72 .flags = DM_FLAG_PRE_RELOC,