[PATCH 9/9] x86: coreboot: Enable VIDEO_COPY
Simon Glass
sjg at chromium.org
Thu Aug 17 03:51:44 CEST 2023
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 at 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,
};
--
2.41.0.694.ge786442a9b-goog
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