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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2017 Rob Clark
- */
- #include <common.h>
- #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);
- 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,
- };
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