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 ---
arch/x86/dts/coreboot.dts | 1 + configs/coreboot64_defconfig | 1 + configs/coreboot_defconfig | 1 + drivers/video/coreboot.c | 12 ++++++++++++ 4 files changed, 15 insertions(+)
diff --git a/arch/x86/dts/coreboot.dts b/arch/x86/dts/coreboot.dts index f9ff5346a79b..0eb31cae42c1 100644 --- a/arch/x86/dts/coreboot.dts +++ b/arch/x86/dts/coreboot.dts @@ -42,6 +42,7 @@ };
coreboot-fb { + bootph-some-ram; compatible = "coreboot-fb"; }; }; diff --git a/configs/coreboot64_defconfig b/configs/coreboot64_defconfig index e5cb3f3d4ebd..54360255c691 100644 --- a/configs/coreboot64_defconfig +++ b/configs/coreboot64_defconfig @@ -59,6 +59,7 @@ CONFIG_NVME_PCI=y CONFIG_SYS_NS16550_MEM32=y CONFIG_SOUND=y CONFIG_SOUND_I8254=y +CONFIG_VIDEO_COPY=y CONFIG_CONSOLE_SCROLL_LINES=5 CONFIG_SPL_ACPI=y CONFIG_CMD_DHRYSTONE=y diff --git a/configs/coreboot_defconfig b/configs/coreboot_defconfig index 790b84a87bc7..78694d635532 100644 --- a/configs/coreboot_defconfig +++ b/configs/coreboot_defconfig @@ -54,6 +54,7 @@ CONFIG_NVME_PCI=y CONFIG_SYS_NS16550_MEM32=y CONFIG_SOUND=y CONFIG_SOUND_I8254=y +CONFIG_VIDEO_COPY=y CONFIG_CONSOLE_SCROLL_LINES=5 CONFIG_CMD_DHRYSTONE=y # CONFIG_GZIP is not set diff --git a/drivers/video/coreboot.c b/drivers/video/coreboot.c index c586475e41ed..5b718ae3e5a5 100644 --- a/drivers/video/coreboot.c +++ b/drivers/video/coreboot.c @@ -73,6 +73,17 @@ err: return ret; }
+static int coreboot_video_bind(struct udevice *dev) +{ + struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev); + + /* Set the maximum supported resolution */ + uc_plat->size = 4096 * 2160 * 4; + log_debug("%s: Frame buffer size %x\n", __func__, uc_plat->size); + + return 0; +} + static const struct udevice_id coreboot_video_ids[] = { { .compatible = "coreboot-fb" }, { } @@ -82,5 +93,6 @@ U_BOOT_DRIVER(coreboot_video) = { .name = "coreboot_video", .id = UCLASS_VIDEO, .of_match = coreboot_video_ids, + .bind = coreboot_video_bind, .probe = coreboot_video_probe, };