projects / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 033167c4 NK |
2 | /* |
| 3 | * Simplefb device tree support | |
| 4 | * | |
| 5 | * (C) Copyright 2015 | |
| 6 | * Stephen Warren <[email protected]> | |
| 033167c4 NK |
7 | */ |
| 8 | ||
| 9 | #include <common.h> | |
| d08e42a8 | 10 | #include <dm.h> |
| 033167c4 | 11 | #include <fdt_support.h> |
| 401d1c4f | 12 | #include <asm/global_data.h> |
| b08c8c48 | 13 | #include <linux/libfdt.h> |
| d08e42a8 | 14 | #include <video.h> |
| 033167c4 NK |
15 | |
| 16 | DECLARE_GLOBAL_DATA_PTR; | |
| 17 | ||
| fded97ad | 18 | static int fdt_simplefb_configure_node(void *blob, int off) |
| 033167c4 | 19 | { |
| 45261455 SG |
20 | int xsize, ysize; |
| 21 | int bpix; /* log2 of bits per pixel */ | |
| 22 | const char *name; | |
| 23 | ulong fb_base; | |
| 8a8d24bd | 24 | struct video_uc_plat *plat; |
| d08e42a8 SG |
25 | struct video_priv *uc_priv; |
| 26 | struct udevice *dev; | |
| 27 | int ret; | |
| 45261455 | 28 | |
| d08e42a8 SG |
29 | ret = uclass_first_device_err(UCLASS_VIDEO, &dev); |
| 30 | if (ret) | |
| 31 | return ret; | |
| 32 | uc_priv = dev_get_uclass_priv(dev); | |
| caa4daa2 | 33 | plat = dev_get_uclass_plat(dev); |
| d08e42a8 SG |
34 | xsize = uc_priv->xsize; |
| 35 | ysize = uc_priv->ysize; | |
| 36 | bpix = uc_priv->bpix; | |
| 37 | fb_base = plat->base; | |
| 45261455 SG |
38 | switch (bpix) { |
| 39 | case 4: /* VIDEO_BPP16 */ | |
| 40 | name = "r5g6b5"; | |
| 41 | break; | |
| 42 | case 5: /* VIDEO_BPP32 */ | |
| 43 | name = "a8r8g8b8"; | |
| 44 | break; | |
| 45 | default: | |
| 46 | return -EINVAL; | |
| 47 | } | |
| 48 | ||
| 49 | return fdt_setup_simplefb_node(blob, off, fb_base, xsize, ysize, | |
| 50 | xsize * (1 << bpix) / 8, name); | |
| 033167c4 NK |
51 | } |
| 52 | ||
| fded97ad | 53 | int fdt_simplefb_add_node(void *blob) |
| 033167c4 NK |
54 | { |
| 55 | static const char compat[] = "simple-framebuffer"; | |
| 56 | static const char disabled[] = "disabled"; | |
| 57 | int off, ret; | |
| 58 | ||
| 59 | off = fdt_add_subnode(blob, 0, "framebuffer"); | |
| 60 | if (off < 0) | |
| 61 | return -1; | |
| 62 | ||
| 63 | ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled)); | |
| 64 | if (ret < 0) | |
| 65 | return -1; | |
| 66 | ||
| 67 | ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat)); | |
| 68 | if (ret < 0) | |
| 69 | return -1; | |
| 70 | ||
| fded97ad | 71 | return fdt_simplefb_configure_node(blob, off); |
| 033167c4 NK |
72 | } |
| 73 | ||
| fded97ad | 74 | int fdt_simplefb_enable_existing_node(void *blob) |
| 033167c4 NK |
75 | { |
| 76 | int off; | |
| 77 | ||
| 78 | off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer"); | |
| 79 | if (off < 0) | |
| 80 | return -1; | |
| 81 | ||
| fded97ad | 82 | return fdt_simplefb_configure_node(blob, off); |
| 033167c4 | 83 | } |
| 77debf61 | 84 | |
| b86986c7 | 85 | #if CONFIG_IS_ENABLED(VIDEO) |
| 77debf61 PD |
86 | int fdt_simplefb_enable_and_mem_rsv(void *blob) |
| 87 | { | |
| 88 | struct fdt_memory mem; | |
| 89 | int ret; | |
| 90 | ||
| 91 | /* nothing to do when video is not active */ | |
| 92 | if (!video_is_active()) | |
| 93 | return 0; | |
| 94 | ||
| 95 | ret = fdt_simplefb_enable_existing_node(blob); | |
| 96 | if (ret) | |
| 97 | return ret; | |
| 98 | ||
| 99 | /* nothing to do when the frame buffer is not defined */ | |
| 100 | if (gd->video_bottom == gd->video_top) | |
| 101 | return 0; | |
| 102 | ||
| 103 | /* reserved with no-map tag the video buffer */ | |
| 104 | mem.start = gd->video_bottom; | |
| 105 | mem.end = gd->video_top - 1; | |
| 106 | ||
| 107 | return fdtdec_add_reserved_memory(blob, "framebuffer", &mem, NULL, 0, NULL, | |
| 108 | FDTDEC_RESERVED_MEMORY_NO_MAP); | |
| 109 | } | |
| 110 | #endif |