Gitiles
Code Review Sign In
gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 74a9f68f7fbe709dca0b20d39a214ae38834b3e8 / . / drivers / video / bcm2835.c
blob: 9326999cd36d23d916d56a380bbcc9a59e669b15 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -0400[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]2/*
3 * (C) Copyright 2012 Stephen Warren
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]4 */
5
6#include <common.h>
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]7#include <dm.h>
Simon Glassf7ae49f2020-05-10 11:40:05 -0600[diff] [blame]8#include <log.h>
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]9#include <video.h>
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]10#include <asm/arch/mbox.h>
Simon Glass2e4170b2017-04-05 16:23:40 -0600[diff] [blame]11#include <asm/arch/msg.h>
Simon Glass90526e92020-05-10 11:39:56 -0600[diff] [blame]12#include <asm/cache.h>
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]13
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]14static int bcm2835_video_probe(struct udevice *dev)
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]15{
Simon Glass8a8d24b2020-12-03 16:55:23 -0700[diff] [blame]16 struct video_uc_plat *plat = dev_get_uclass_plat(dev);
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]17 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]18 int ret;
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]19 int w, h, pitch;
Simon Glass7cac2fc2017-04-05 16:23:41 -0600[diff] [blame]20 ulong fb_base, fb_size, fb_start, fb_end;
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]21
22 debug("bcm2835: Query resolution...\n");
Simon Glass2e4170b2017-04-05 16:23:40 -0600[diff] [blame]23 ret = bcm2835_get_video_size(&w, &h);
Fabian Vogt970baf12019-07-11 16:56:24 +0200[diff] [blame]24 if (ret || w == 0 || h == 0)
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]25 return -EIO;
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]26
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]27 debug("bcm2835: Setting up display for %d x %d\n", w, h);
Simon Glass7cac2fc2017-04-05 16:23:41 -0600[diff] [blame]28 ret = bcm2835_set_video_params(&w, &h, 32, BCM2835_MBOX_PIXEL_ORDER_RGB,
29 BCM2835_MBOX_ALPHA_MODE_IGNORED,
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]30 &fb_base, &fb_size, &pitch);
Fabian Vogt970baf12019-07-11 16:56:24 +0200[diff] [blame]31 if (ret)
32 return -EIO;
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]33
34 debug("bcm2835: Final resolution is %d x %d\n", w, h);
35
Alexander Graf99de2542016-03-24 10:31:11 +0100[diff] [blame]36 /* Enable dcache for the frame buffer */
Simon Glass7cac2fc2017-04-05 16:23:41 -0600[diff] [blame]37 fb_start = fb_base & ~(MMU_SECTION_SIZE - 1);
38 fb_end = fb_base + fb_size;
Alexander Graf99de2542016-03-24 10:31:11 +0100[diff] [blame]39 fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
40 mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
Simon Glass7cac2fc2017-04-05 16:23:41 -0600[diff] [blame]41 DCACHE_WRITEBACK);
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]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;
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000[diff] [blame]51}
52
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]53static const struct udevice_id bcm2835_video_ids[] = {
54 { .compatible = "brcm,bcm2835-hdmi" },
Emmanuel Vadot425daac2018-07-02 14:33:14 +0200[diff] [blame]55 { .compatible = "brcm,bcm2708-fb" },
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]56 { }
57};
Andre Heider44376ef2013-11-09 11:07:53 +0100[diff] [blame]58
Simon Glassea843b62017-04-05 16:23:44 -0600[diff] [blame]59U_BOOT_DRIVER(bcm2835_video) = {
60 .name = "bcm2835_video",
61 .id = UCLASS_VIDEO,
62 .of_match = bcm2835_video_ids,
63 .probe = bcm2835_video_probe,
64};