LXR uboot/common/lcd

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Simplefb device tree support
   4 *
   5 * (C) Copyright 2015
   6 * Stephen Warren <swarren@wwwdotorg.org>
   7 */
   8
   9#include <common.h>
  10#include <dm.h>
  11#include <lcd.h>
  12#include <fdt_support.h>
  13#include <asm/global_data.h>
  14#include <linux/libfdt.h>
  15#include <video.h>
  16
  17DECLARE_GLOBAL_DATA_PTR;
  18
  19static int lcd_dt_simplefb_configure_node(void *blob, int off)
  20{
  21        int xsize, ysize;
  22        int bpix; /* log2 of bits per pixel */
  23        const char *name;
  24        ulong fb_base;
  25#ifdef CONFIG_DM_VIDEO
  26        struct video_uc_plat *plat;
  27        struct video_priv *uc_priv;
  28        struct udevice *dev;
  29        int ret;
  30
  31        ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
  32        if (ret)
  33                return ret;
  34        uc_priv = dev_get_uclass_priv(dev);
  35        plat = dev_get_uclass_plat(dev);
  36        xsize = uc_priv->xsize;
  37        ysize = uc_priv->ysize;
  38        bpix = uc_priv->bpix;
  39        fb_base = plat->base;
  40#else
  41        xsize = lcd_get_pixel_width();
  42        ysize = lcd_get_pixel_height();
  43        bpix = LCD_BPP;
  44        fb_base = gd->fb_base;
  45#endif
  46        switch (bpix) {
  47        case 4: /* VIDEO_BPP16 */
  48                name = "r5g6b5";
  49                break;
  50        case 5: /* VIDEO_BPP32 */
  51                name = "a8r8g8b8";
  52                break;
  53        default:
  54                return -EINVAL;
  55        }
  56
  57        return fdt_setup_simplefb_node(blob, off, fb_base, xsize, ysize,
  58                                       xsize * (1 << bpix) / 8, name);
  59}
  60
  61int lcd_dt_simplefb_add_node(void *blob)
  62{
  63        static const char compat[] = "simple-framebuffer";
  64        static const char disabled[] = "disabled";
  65        int off, ret;
  66
  67        off = fdt_add_subnode(blob, 0, "framebuffer");
  68        if (off < 0)
  69                return -1;
  70
  71        ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
  72        if (ret < 0)
  73                return -1;
  74
  75        ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
  76        if (ret < 0)
  77                return -1;
  78
  79        return lcd_dt_simplefb_configure_node(blob, off);
  80}
  81
  82int lcd_dt_simplefb_enable_existing_node(void *blob)
  83{
  84        int off;
  85
  86        off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
  87        if (off < 0)
  88                return -1;
  89
  90        return lcd_dt_simplefb_configure_node(blob, off);
  91}
  92