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