Merge tag 'u-boot-imx-20211020' of https://source.denx.de/u-boot/custodians/u-boot-imx
[platform/kernel/u-boot.git] / drivers / video / simplefb.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2017 Rob Clark
4  */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <fdtdec.h>
9 #include <fdt_support.h>
10 #include <log.h>
11 #include <video.h>
12 #include <asm/global_data.h>
13
14 static int simple_video_probe(struct udevice *dev)
15 {
16         struct video_uc_plat *plat = dev_get_uclass_plat(dev);
17         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;
53         } else if (strcmp(format, "a8b8g8r8") == 0 ||
54                    strcmp(format, "x8b8g8r8") == 0) {
55                 uc_priv->bpix = VIDEO_BPP32;
56                 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;
65         } else {
66                 printf("%s: invalid format: %s\n", __func__, format);
67                 return -EINVAL;
68         }
69
70         return 0;
71 }
72
73 static const struct udevice_id simple_video_ids[] = {
74         { .compatible = "simple-framebuffer" },
75         { }
76 };
77
78 U_BOOT_DRIVER(simple_video) = {
79         .name   = "simple_video",
80         .id     = UCLASS_VIDEO,
81         .of_match = simple_video_ids,
82         .probe  = simple_video_probe,
83 };