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 <video.h> 11 12 static int simple_video_probe(struct udevice *dev) 13 { 14 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); 15 struct video_priv *uc_priv = dev_get_uclass_priv(dev); 16 const void *blob = gd->fdt_blob; 17 const int node = dev_of_offset(dev); 18 const char *format; 19 fdt_addr_t base; 20 fdt_size_t size; 21 22 base = fdtdec_get_addr_size_auto_parent(blob, dev_of_offset(dev->parent), 23 node, "reg", 0, &size, false); 24 if (base == FDT_ADDR_T_NONE) { 25 debug("%s: Failed to decode memory region\n", __func__); 26 return -EINVAL; 27 } 28 29 debug("%s: base=%llx, size=%llu\n", __func__, base, size); 30 31 /* 32 * TODO is there some way to reserve the framebuffer 33 * region so it isn't clobbered? 34 */ 35 plat->base = base; 36 plat->size = size; 37 38 video_set_flush_dcache(dev, true); 39 40 debug("%s: Query resolution...\n", __func__); 41 42 uc_priv->xsize = fdtdec_get_uint(blob, node, "width", 0); 43 uc_priv->ysize = fdtdec_get_uint(blob, node, "height", 0); 44 uc_priv->rot = 0; 45 46 format = fdt_getprop(blob, node, "format", NULL); 47 debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format); 48 49 if (strcmp(format, "r5g6b5") == 0) { 50 uc_priv->bpix = VIDEO_BPP16; 51 } else if (strcmp(format, "a8b8g8r8") == 0) { 52 uc_priv->bpix = VIDEO_BPP32; 53 } else { 54 printf("%s: invalid format: %s\n", __func__, format); 55 return -EINVAL; 56 } 57 58 return 0; 59 } 60 61 static const struct udevice_id simple_video_ids[] = { 62 { .compatible = "simple-framebuffer" }, 63 { } 64 }; 65 66 U_BOOT_DRIVER(simple_video) = { 67 .name = "simple_video", 68 .id = UCLASS_VIDEO, 69 .of_match = simple_video_ids, 70 .probe = simple_video_probe, 71 }; 72