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 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