diff options
| -rw-r--r-- | drivers/video/sunxi_display.c | 22 | ||||
| -rw-r--r-- | include/configs/sunxi-common.h | 8 |
2 files changed, 24 insertions, 6 deletions
diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index f5f24fc..cd5963a 100644 --- a/drivers/video/sunxi_display.c +++ b/drivers/video/sunxi_display.c @@ -1060,6 +1060,11 @@ static const char *sunxi_get_mon_desc(enum sunxi_monitor monitor) return NULL; /* never reached */ } +ulong board_get_usable_ram_top(ulong total_size) +{ + return gd->ram_top - CONFIG_SUNXI_MAX_FB_SIZE; +} + void *video_hw_init(void) { static GraphicDevice *graphic_device = &sunxi_display.graphic_device; @@ -1076,7 +1081,7 @@ void *video_hw_init(void) memset(&sunxi_display, 0, sizeof(struct sunxi_display)); printf("Reserved %dkB of RAM for Framebuffer.\n", - CONFIG_SUNXI_FB_SIZE >> 10); + CONFIG_SUNXI_MAX_FB_SIZE >> 10); gd->fb_base = gd->ram_top; video_get_ctfb_res_modes(RES_MODE_1024x768, 24, &mode, @@ -1194,6 +1199,7 @@ int sunxi_simplefb_setup(void *blob) { static GraphicDevice *graphic_device = &sunxi_display.graphic_device; int offset, ret; + u64 start, size; const char *pipeline = NULL; #ifdef CONFIG_MACH_SUN4I @@ -1237,6 +1243,20 @@ int sunxi_simplefb_setup(void *blob) return 0; /* Keep older kernels working */ } + /* + * Do not report the framebuffer as free RAM to the OS, note we cannot + * use fdt_add_mem_rsv() here, because then it is still seen as RAM, + * and e.g. Linux refuses to iomap RAM on ARM, see: + * linux/arch/arm/mm/ioremap.c around line 301. + */ + start = gd->bd->bi_dram[0].start; + size = gd->bd->bi_dram[0].size - CONFIG_SUNXI_MAX_FB_SIZE; + ret = fdt_fixup_memory_banks(blob, &start, &size, 1); + if (ret) { + eprintf("Cannot setup simplefb: Error reserving memory\n"); + return ret; + } + ret = fdt_setup_simplefb_node(blob, offset, gd->fb_base, graphic_device->winSizeX, graphic_device->winSizeY, graphic_device->winSizeX * graphic_device->gdfBytesPP, diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h index cea52db..33c0614 100644 --- a/include/configs/sunxi-common.h +++ b/include/configs/sunxi-common.h @@ -210,10 +210,10 @@ #ifdef CONFIG_VIDEO /* - * The amount of RAM that is reserved for the FB. This will not show up as - * RAM to the kernel, but will be reclaimed by a KMS driver in future. + * The amount of RAM to keep free at the top of RAM when relocating u-boot, + * to use as framebuffer. This must be a multiple of 4096. */ -#define CONFIG_SUNXI_FB_SIZE (9 << 20) +#define CONFIG_SUNXI_MAX_FB_SIZE (9 << 20) /* Do we want to initialize a simple FB? */ #define CONFIG_VIDEO_DT_SIMPLEFB @@ -231,8 +231,6 @@ /* stop x86 thinking in cfbconsole from trying to init a pc keyboard */ #define CONFIG_VGA_AS_SINGLE_DEVICE -#define CONFIG_SYS_MEM_TOP_HIDE ((CONFIG_SUNXI_FB_SIZE + 0xFFF) & ~0xFFF) - /* To be able to hook simplefb into dt */ #ifdef CONFIG_VIDEO_DT_SIMPLEFB #define CONFIG_OF_BOARD_SETUP |