blob: 2b0d8835e383376dfb9b92abd291f5f676c300c4 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Rob Clark971d7e62017-08-03 12:47:00 -04002/*
3 * (C) Copyright 2017 Rob Clark
Rob Clark971d7e62017-08-03 12:47:00 -04004 */
5
6#include <common.h>
7#include <dm.h>
8#include <fdtdec.h>
9#include <fdt_support.h>
Simon Glassf7ae49f2020-05-10 11:40:05 -060010#include <log.h>
Rob Clark971d7e62017-08-03 12:47:00 -040011#include <video.h>
Simon Glass401d1c42020-10-30 21:38:53 -060012#include <asm/global_data.h>
Rob Clark971d7e62017-08-03 12:47:00 -040013
14static int simple_video_probe(struct udevice *dev)
15{
Simon Glass8a8d24b2020-12-03 16:55:23 -070016 struct video_uc_plat *plat = dev_get_uclass_plat(dev);
Rob Clark971d7e62017-08-03 12:47:00 -040017 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
18 const void *blob = gd->fdt_blob;
19 const int node = dev_of_offset(dev);
20 const char *format;
21 fdt_addr_t base;
22 fdt_size_t size;
23
24 base = fdtdec_get_addr_size_auto_parent(blob, dev_of_offset(dev->parent),
25 node, "reg", 0, &size, false);
26 if (base == FDT_ADDR_T_NONE) {
27 debug("%s: Failed to decode memory region\n", __func__);
28 return -EINVAL;
29 }
30
31 debug("%s: base=%llx, size=%llu\n", __func__, base, size);
32
33 /*
34 * TODO is there some way to reserve the framebuffer
35 * region so it isn't clobbered?
36 */
37 plat->base = base;
38 plat->size = size;
39
40 video_set_flush_dcache(dev, true);
41
42 debug("%s: Query resolution...\n", __func__);
43
44 uc_priv->xsize = fdtdec_get_uint(blob, node, "width", 0);
45 uc_priv->ysize = fdtdec_get_uint(blob, node, "height", 0);
46 uc_priv->rot = 0;
47
48 format = fdt_getprop(blob, node, "format", NULL);
49 debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format);
50
51 if (strcmp(format, "r5g6b5") == 0) {
52 uc_priv->bpix = VIDEO_BPP16;
Mark Kettenis2c2653d2021-09-25 22:47:38 +020053 } else if (strcmp(format, "a8b8g8r8") == 0 ||
54 strcmp(format, "x8b8g8r8") == 0) {
Rob Clark971d7e62017-08-03 12:47:00 -040055 uc_priv->bpix = VIDEO_BPP32;
Mark Kettenis2c2653d2021-09-25 22:47:38 +020056 uc_priv->format = VIDEO_X8B8G8R8;
57 } else if (strcmp(format, "a8r8g8b8") == 0 ||
58 strcmp(format, "x8r8g8b8") == 0) {
59 uc_priv->bpix = VIDEO_BPP32;
60 uc_priv->format = VIDEO_X8R8G8B8;
61 } else if (strcmp(format, "a2r10g10b10") == 0 ||
62 strcmp(format, "x2r10g10b10") == 0) {
63 uc_priv->bpix = VIDEO_BPP32;
64 uc_priv->format = VIDEO_X2R10G10B10;
Rob Clark971d7e62017-08-03 12:47:00 -040065 } else {
66 printf("%s: invalid format: %s\n", __func__, format);
67 return -EINVAL;
68 }
69
70 return 0;
71}
72
73static const struct udevice_id simple_video_ids[] = {
74 { .compatible = "simple-framebuffer" },
75 { }
76};
77
78U_BOOT_DRIVER(simple_video) = {
79 .name = "simple_video",
80 .id = UCLASS_VIDEO,
81 .of_match = simple_video_ids,
82 .probe = simple_video_probe,
Rob Clark971d7e62017-08-03 12:47:00 -040083};