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efe1ceec7e
Create separate helper for just reserving framebuffer region without creating or enabling simple-framebuffer node. This is useful for scenarios where user want to preserve the bootloader splash screen till OS boots up and display server gets started without displaying anything else in between and thus not requiring simple-framebuffer. Signed-off-by: Devarsh Thakkar <devarsht@ti.com> Reviewed-by: Nikhil M Jain <n-jain1@ti.com>
122 lines
2.5 KiB
C
122 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Simplefb device tree support
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*
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* (C) Copyright 2015
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* Stephen Warren <swarren@wwwdotorg.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <fdt_support.h>
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#include <asm/global_data.h>
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#include <linux/libfdt.h>
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#include <video.h>
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#include <spl.h>
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#include <bloblist.h>
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DECLARE_GLOBAL_DATA_PTR;
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static int fdt_simplefb_configure_node(void *blob, int off)
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{
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int xsize, ysize;
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int bpix; /* log2 of bits per pixel */
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const char *name;
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ulong fb_base;
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struct video_uc_plat *plat;
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struct video_priv *uc_priv;
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struct udevice *dev;
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int ret;
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if (IS_ENABLED(CONFIG_SPL_VIDEO_HANDOFF) && spl_phase() > PHASE_SPL) {
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struct video_handoff *ho;
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ho = bloblist_find(BLOBLISTT_U_BOOT_VIDEO, sizeof(*ho));
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if (!ho)
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return log_msg_ret("Missing video bloblist", -ENOENT);
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xsize = ho->xsize;
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ysize = ho->ysize;
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bpix = ho->bpix;
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fb_base = ho->fb;
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} else {
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ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
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if (ret)
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return ret;
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uc_priv = dev_get_uclass_priv(dev);
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plat = dev_get_uclass_plat(dev);
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xsize = uc_priv->xsize;
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ysize = uc_priv->ysize;
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bpix = uc_priv->bpix;
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fb_base = plat->base;
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}
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switch (bpix) {
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case 4: /* VIDEO_BPP16 */
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name = "r5g6b5";
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break;
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case 5: /* VIDEO_BPP32 */
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name = "a8r8g8b8";
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break;
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default:
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return -EINVAL;
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}
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return fdt_setup_simplefb_node(blob, off, fb_base, xsize, ysize,
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xsize * (1 << bpix) / 8, name);
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}
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int fdt_simplefb_add_node(void *blob)
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{
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static const char compat[] = "simple-framebuffer";
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static const char disabled[] = "disabled";
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int off, ret;
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off = fdt_add_subnode(blob, 0, "framebuffer");
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if (off < 0)
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return -1;
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ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
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if (ret < 0)
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return -1;
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ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
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if (ret < 0)
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return -1;
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return fdt_simplefb_configure_node(blob, off);
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}
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/**
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* fdt_simplefb_enable_existing_node() - enable simple-framebuffer DT node
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*
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* @blob: device-tree
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* Return: 0 on success, non-zero otherwise
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*/
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static int fdt_simplefb_enable_existing_node(void *blob)
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{
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int off;
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off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
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if (off < 0)
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return -1;
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return fdt_simplefb_configure_node(blob, off);
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}
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#if IS_ENABLED(CONFIG_VIDEO)
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int fdt_simplefb_enable_and_mem_rsv(void *blob)
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{
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int ret;
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/* nothing to do when video is not active */
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if (!video_is_active())
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return 0;
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ret = fdt_simplefb_enable_existing_node(blob);
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if (ret)
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return ret;
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return fdt_add_fb_mem_rsv(blob);
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}
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#endif
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