bcm2835.c
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/*
* (C) Copyright 2012 Stephen Warren
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <video.h>
#include <asm/arch/mbox.h>
#include <asm/arch/msg.h>
static int bcm2835_video_probe(struct udevice *dev)
{
struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
int ret;
int w, h, pitch;
ulong fb_base, fb_size, fb_start, fb_end;
debug("bcm2835: Query resolution...\n");
ret = bcm2835_get_video_size(&w, &h);
if (ret)
return -EIO;
debug("bcm2835: Setting up display for %d x %d\n", w, h);
ret = bcm2835_set_video_params(&w, &h, 32, BCM2835_MBOX_PIXEL_ORDER_RGB,
BCM2835_MBOX_ALPHA_MODE_IGNORED,
&fb_base, &fb_size, &pitch);
debug("bcm2835: Final resolution is %d x %d\n", w, h);
/* Enable dcache for the frame buffer */
fb_start = fb_base & ~(MMU_SECTION_SIZE - 1);
fb_end = fb_base + fb_size;
fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
DCACHE_WRITEBACK);
video_set_flush_dcache(dev, true);
uc_priv->xsize = w;
uc_priv->ysize = h;
uc_priv->bpix = VIDEO_BPP32;
plat->base = fb_base;
plat->size = fb_size;
return 0;
}
static const struct udevice_id bcm2835_video_ids[] = {
{ .compatible = "brcm,bcm2835-hdmi" },
{ }
};
U_BOOT_DRIVER(bcm2835_video) = {
.name = "bcm2835_video",
.id = UCLASS_VIDEO,
.of_match = bcm2835_video_ids,
.probe = bcm2835_video_probe,
};