video: bochs: Support a copy buffer

Provide support for using CONFIG_VIDEO_COPY with bochs, since this can help to reduce flicker with QEMU Signed-off-by: Simon Glass <sjg@chromium.org> Series-to: u-boot Series-links: 1:458274
2025-05-24 08:15:41 -06:00
1 changed files with 5 additions and 1 deletions
--- a/drivers/video/bochs.c
+++ b/drivers/video/bochs.c
@@ -81,7 +81,11 @@ static int bochs_init_fb(struct udevice *dev)
 	/* disable blanking */
 	bochs_vga_write(mmio, VGA_ATT_W - VGA_INDEX, VGA_AR_ENABLE_DISPLAY);

-	plat->base = fb;
+	/* Use double buffering if enabled */
+	if (IS_ENABLED(CONFIG_VIDEO_COPY) && plat->base)
+		plat->copy_base = fb;
+	else
+		plat->base = fb;

 	return 0;
 }