mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
3fef0def84
At least on modern machines the write-back mechanism for the frame buffer is quite slow when scrolling, since it must read the entire frame buffer and write it back. Enable the VIDEO_COPY feature to resolve this problem. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <init.h>
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#include <vesa.h>
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#include <video.h>
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#include <asm/cb_sysinfo.h>
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static int save_vesa_mode(struct cb_framebuffer *fb,
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struct vesa_mode_info *vesa)
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{
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/*
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* If there is no framebuffer structure, bail out and keep
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* running on the serial console.
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*/
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if (!fb)
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return log_msg_ret("save", -ENXIO);
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vesa->x_resolution = fb->x_resolution;
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vesa->y_resolution = fb->y_resolution;
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vesa->bits_per_pixel = fb->bits_per_pixel;
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vesa->bytes_per_scanline = fb->bytes_per_line;
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vesa->phys_base_ptr = fb->physical_address;
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vesa->red_mask_size = fb->red_mask_size;
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vesa->red_mask_pos = fb->red_mask_pos;
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vesa->green_mask_size = fb->green_mask_size;
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vesa->green_mask_pos = fb->green_mask_pos;
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vesa->blue_mask_size = fb->blue_mask_size;
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vesa->blue_mask_pos = fb->blue_mask_pos;
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vesa->reserved_mask_size = fb->reserved_mask_size;
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vesa->reserved_mask_pos = fb->reserved_mask_pos;
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return 0;
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}
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static int coreboot_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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struct cb_framebuffer *fb = lib_sysinfo.framebuffer;
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struct vesa_mode_info *vesa = &mode_info.vesa;
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int ret;
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if (ll_boot_init())
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return log_msg_ret("ll", -ENODEV);
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printf("Video: ");
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/* Initialize vesa_mode_info structure */
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ret = save_vesa_mode(fb, vesa);
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if (ret) {
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ret = log_msg_ret("save", ret);
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goto err;
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}
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ret = vesa_setup_video_priv(vesa, vesa->phys_base_ptr, uc_priv, plat);
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if (ret) {
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ret = log_msg_ret("setup", ret);
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goto err;
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}
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printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
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vesa->bits_per_pixel);
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return 0;
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err:
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printf("No video mode configured in coreboot (err=%d)\n", ret);
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return ret;
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}
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static int coreboot_video_bind(struct udevice *dev)
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{
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struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
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/* Set the maximum supported resolution */
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uc_plat->size = 4096 * 2160 * 4;
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log_debug("%s: Frame buffer size %x\n", __func__, uc_plat->size);
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return 0;
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}
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static const struct udevice_id coreboot_video_ids[] = {
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{ .compatible = "coreboot-fb" },
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{ }
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};
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U_BOOT_DRIVER(coreboot_video) = {
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.name = "coreboot_video",
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.id = UCLASS_VIDEO,
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.of_match = coreboot_video_ids,
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.bind = coreboot_video_bind,
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.probe = coreboot_video_probe,
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};
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