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 14static 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 ofnode node = dev_ofnode(dev); 19 const char *format; 20 int ret; 21 fdt_addr_t base; 22 fdt_size_t size; 23 u32 width, height, rot; 24 25 base = dev_read_addr_size(dev, &size); 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 ret = ofnode_read_u32(node, "width", &width); 45 ret = ret ?: ofnode_read_u32(node, "height", &height); 46 if (ret || !width || !height) { 47 log_err("%s: invalid width or height: %d\n", __func__, ret); 48 return ret ?: -EINVAL; 49 } 50 ofnode_read_u32(node, "rot", &rot); 51 uc_priv->rot = rot; 52 uc_priv->xsize = width; 53 uc_priv->ysize = height; 54 55 format = ofnode_read_string(node, "format"); 56 debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format); 57 58 if (!format) { 59 log_err("%s: please add required property \"format\"\n", __func__); 60 return -EINVAL; 61 } 62 63 if (strcmp(format, "r5g6b5") == 0) { 64 uc_priv->bpix = VIDEO_BPP16; 65 } else if (strcmp(format, "a8b8g8r8") == 0 || 66 strcmp(format, "x8b8g8r8") == 0) { 67 uc_priv->bpix = VIDEO_BPP32; 68 uc_priv->format = VIDEO_X8B8G8R8; 69 } else if (strcmp(format, "a8r8g8b8") == 0 || 70 strcmp(format, "x8r8g8b8") == 0) { 71 uc_priv->bpix = VIDEO_BPP32; 72 uc_priv->format = VIDEO_X8R8G8B8; 73 } else if (strcmp(format, "a2r10g10b10") == 0 || 74 strcmp(format, "x2r10g10b10") == 0) { 75 uc_priv->bpix = VIDEO_BPP32; 76 uc_priv->format = VIDEO_X2R10G10B10; 77 } else { 78 log_err("%s: invalid format: %s\n", __func__, format); 79 return -EINVAL; 80 } 81 82 return 0; 83} 84 85static const struct udevice_id simple_video_ids[] = { 86 { .compatible = "simple-framebuffer" }, 87 { } 88}; 89 90U_BOOT_DRIVER(simple_video) = { 91 .name = "simple_video", 92 .id = UCLASS_VIDEO, 93 .of_match = simple_video_ids, 94 .probe = simple_video_probe, 95}; 96