1 /* 2 * (C) Copyright 2012 Stephen Warren 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <video.h> 10 #include <asm/arch/mbox.h> 11 #include <asm/arch/msg.h> 12 13 static int bcm2835_video_probe(struct udevice *dev) 14 { 15 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); 16 struct video_priv *uc_priv = dev_get_uclass_priv(dev); 17 int ret; 18 int w, h, pitch; 19 ulong fb_base, fb_size, fb_start, fb_end; 20 21 debug("bcm2835: Query resolution...\n"); 22 ret = bcm2835_get_video_size(&w, &h); 23 if (ret) 24 return -EIO; 25 26 debug("bcm2835: Setting up display for %d x %d\n", w, h); 27 ret = bcm2835_set_video_params(&w, &h, 32, BCM2835_MBOX_PIXEL_ORDER_RGB, 28 BCM2835_MBOX_ALPHA_MODE_IGNORED, 29 &fb_base, &fb_size, &pitch); 30 31 debug("bcm2835: Final resolution is %d x %d\n", w, h); 32 33 /* Enable dcache for the frame buffer */ 34 fb_start = fb_base & ~(MMU_SECTION_SIZE - 1); 35 fb_end = fb_base + fb_size; 36 fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT); 37 mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start, 38 DCACHE_WRITEBACK); 39 video_set_flush_dcache(dev, true); 40 41 uc_priv->xsize = w; 42 uc_priv->ysize = h; 43 uc_priv->bpix = VIDEO_BPP32; 44 plat->base = fb_base; 45 plat->size = fb_size; 46 47 return 0; 48 } 49 50 static const struct udevice_id bcm2835_video_ids[] = { 51 { .compatible = "brcm,bcm2835-hdmi" }, 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