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cce167eb8d
brcm,bcm2708-fb device provided by firmware on RPi5 uses 16 bits per pixel, so lets calculate framebuffer bytes per pixel dynamically based on queried information. Tested to work for RPi2b v1.2, RPi3b v1.3, RPi4b v1.1, RPi2 Zero W, RPi5b v1.0. Reviewed-by: Matthias Brugger <mbrugger@suse.com> Tested-by: Jens Maus <mail@jens-maus.de> Tested-by: Darko Alavanja <darko.alavanja@konsulko.com> Signed-off-by: Ivan T. Ivanov <iivanov@suse.de> Signed-off-by: Matthias Brugger <mbrugger@suse.com>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2012 Stephen Warren
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*/
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#include <common.h>
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#include <dm.h>
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#include <log.h>
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#include <video.h>
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#include <asm/arch/mbox.h>
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#include <asm/arch/msg.h>
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#include <asm/cache.h>
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static int bcm2835_video_probe(struct udevice *dev)
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{
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struct video_uc_plat *plat = dev_get_uclass_plat(dev);
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struct video_priv *uc_priv = dev_get_uclass_priv(dev);
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int ret;
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int w, h, pitch, bpp;
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ulong fb_base, fb_size, fb_start, fb_end;
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debug("bcm2835: Query resolution...\n");
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ret = bcm2835_get_video_size(&w, &h);
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if (ret || w == 0 || h == 0)
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return -EIO;
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debug("bcm2835: Setting up display for %d x %d\n", w, h);
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ret = bcm2835_set_video_params(&w, &h, 32, BCM2835_MBOX_PIXEL_ORDER_RGB,
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BCM2835_MBOX_ALPHA_MODE_IGNORED,
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&fb_base, &fb_size, &pitch);
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if (ret)
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return -EIO;
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debug("bcm2835: Final resolution is %d x %d\n", w, h);
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/* Enable dcache for the frame buffer */
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fb_start = fb_base & ~(MMU_SECTION_SIZE - 1);
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fb_end = fb_base + fb_size;
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fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
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mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
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DCACHE_WRITEBACK);
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video_set_flush_dcache(dev, true);
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bpp = pitch / w;
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switch (bpp) {
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case 2:
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uc_priv->bpix = VIDEO_BPP16;
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break;
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case 4:
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uc_priv->bpix = VIDEO_BPP32;
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break;
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default:
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printf("bcm2835: unexpected bpp %d, pitch %d, width %d\n",
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bpp, pitch, w);
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uc_priv->bpix = VIDEO_BPP32;
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break;
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}
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uc_priv->xsize = w;
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uc_priv->ysize = h;
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plat->base = fb_base;
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plat->size = fb_size;
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return 0;
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}
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static const struct udevice_id bcm2835_video_ids[] = {
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{ .compatible = "brcm,bcm2835-hdmi" },
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{ .compatible = "brcm,bcm2711-hdmi0" },
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{ .compatible = "brcm,bcm2708-fb" },
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#if !IS_ENABLED(CONFIG_VIDEO_DT_SIMPLEFB)
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{ .compatible = "simple-framebuffer" },
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#endif
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{ }
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};
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U_BOOT_DRIVER(bcm2835_video) = {
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.name = "bcm2835_video",
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.id = UCLASS_VIDEO,
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.of_match = bcm2835_video_ids,
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.probe = bcm2835_video_probe,
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};
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