LXR uboot/drivers/video/bcm2835.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2012 Stephen Warren
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <log.h>
   9#include <video.h>
  10#include <asm/arch/mbox.h>
  11#include <asm/arch/msg.h>
  12#include <asm/cache.h>
  13
  14static int bcm2835_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        int ret;
  19        int w, h, pitch;
  20        ulong fb_base, fb_size, fb_start, fb_end;
  21
  22        debug("bcm2835: Query resolution...\n");
  23        ret = bcm2835_get_video_size(&w, &h);
  24        if (ret || w == 0 || h == 0)
  25                return -EIO;
  26
  27        debug("bcm2835: Setting up display for %d x %d\n", w, h);
  28        ret = bcm2835_set_video_params(&w, &h, 32, BCM2835_MBOX_PIXEL_ORDER_RGB,
  29                                       BCM2835_MBOX_ALPHA_MODE_IGNORED,
  30                                       &fb_base, &fb_size, &pitch);
  31        if (ret)
  32                return -EIO;
  33
  34        debug("bcm2835: Final resolution is %d x %d\n", w, h);
  35
  36        /* Enable dcache for the frame buffer */
  37        fb_start = fb_base & ~(MMU_SECTION_SIZE - 1);
  38        fb_end = fb_base + fb_size;
  39        fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
  40        mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
  41                                        DCACHE_WRITEBACK);
  42        video_set_flush_dcache(dev, true);
  43
  44        uc_priv->xsize = w;
  45        uc_priv->ysize = h;
  46        uc_priv->bpix = VIDEO_BPP32;
  47        plat->base = fb_base;
  48        plat->size = fb_size;
  49
  50        return 0;
  51}
  52
  53static const struct udevice_id bcm2835_video_ids[] = {
  54        { .compatible = "brcm,bcm2835-hdmi" },
  55        { .compatible = "brcm,bcm2711-hdmi0" },
  56        { .compatible = "brcm,bcm2708-fb" },
  57        { }
  58};
  59
  60U_BOOT_DRIVER(bcm2835_video) = {
  61        .name   = "bcm2835_video",
  62        .id     = UCLASS_VIDEO,
  63        .of_match = bcm2835_video_ids,
  64        .probe  = bcm2835_video_probe,
  65};
  66