[PATCH v3 06/13] efi: Support copy framebuffer

[Simon Glass]

Add support for this to EFI in case it becomes useful. At present it just
slows things down. You can enable CONFIG_VIDEO_COPY to turn it on.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v3:
- Add a comment about the fallback

Changes in v2:
- Obtain copy framebuffer size from EFI instead of using a fixed value
- Dropping debugging printf()
- Use new bootph-xxx tag

 arch/x86/dts/efi-x86_app.dts |  1 +
 drivers/video/efi.c          | 26 +++++++++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/arch/x86/dts/efi-x86_app.dts b/arch/x86/dts/efi-x86_app.dts
index 6d843a9820b..59e2e402d5e 100644
--- a/arch/x86/dts/efi-x86_app.dts
+++ b/arch/x86/dts/efi-x86_app.dts
@@ -27,6 +27,7 @@
 	};
 	efi-fb {
 		compatible = "efi-fb";
+		bootph-some-ram;
 	};
 
 };
diff --git a/drivers/video/efi.c b/drivers/video/efi.c
index 169637c2882..28ac15ff61b 100644
--- a/drivers/video/efi.c
+++ b/drivers/video/efi.c
@@ -129,7 +129,6 @@ static int save_vesa_mode(struct vesa_mode_info *vesa, u64 *fbp)
 	struct efi_gop_mode_info *info;
 	int ret;
 
-	printf("start\n");
 	if (IS_ENABLED(CONFIG_EFI_APP))
 		ret = get_mode_info(vesa, fbp, &info);
 	else
@@ -207,6 +206,30 @@ err:
 	return ret;
 }
 
+static int efi_video_bind(struct udevice *dev)
+{
+	if (IS_ENABLED(CONFIG_VIDEO_COPY)) {
+		struct video_uc_plat *plat = dev_get_uclass_plat(dev);
+		struct vesa_mode_info vesa;
+		int ret;
+		u64 fb;
+
+		/*
+		 * Initialise vesa_mode_info structure so we can figure out the
+		 * required framebuffer size. If something goes wrong, just do
+		 * without a copy framebuffer
+		 */
+		ret = save_vesa_mode(&vesa, &fb);
+		if (!ret) {
+			/* this is not reached if the EFI call failed */
+			plat->copy_size = vesa.bytes_per_scanline *
+				vesa.y_resolution;
+		}
+	}
+
+	return 0;
+}
+
 static const struct udevice_id efi_video_ids[] = {
 	{ .compatible = "efi-fb" },
 	{ }
@@ -216,5 +239,6 @@ U_BOOT_DRIVER(efi_video) = {
 	.name	= "efi_video",
 	.id	= UCLASS_VIDEO,
 	.of_match = efi_video_ids,
+	.bind	= efi_video_bind,
 	.probe	= efi_video_probe,
 };
-- 
2.40.0.rc1.284.g88254d51c5-goog