[gnome-build-meta/tpreston/rpi4: 3/3] raspi: boot: Use VideoCore 4 Firmware KMS

[Thomas Preston <tpreston src gnome org>]

commit c2c6ba01838cc5ef51fd72da43124cab7f01af4f
Author: Thomas Preston <thomas preston codethink co uk>
Date:   Fri May 1 10:05:40 2020 +0100

    raspi: boot: Use VideoCore 4 Firmware KMS
    
    Use VideoCore 4 Firmware KMS, open-source KMS driver is work in progress
    for Raspberry Pi 4.
    
    See:
    - https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/gpu/drm/vc4/vc4_firmware_kms.c
    - https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/gpu/drm/vc4/vc4_kms.c

 elements/raspi/bsp/boot.bst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/elements/raspi/bsp/boot.bst b/elements/raspi/bsp/boot.bst
index 71c0762c..d6df4dbb 100644
--- a/elements/raspi/bsp/boot.bst
+++ b/elements/raspi/bsp/boot.bst
@@ -26,7 +26,9 @@ config:
     arm_64bit=1
     start_x=1
     gpu_mem=16
-    dtoverlay=vc4-kms-v3d
+
+    # Use VideoCore 4 Firmware KMS shim for RPi4, open-source KMS is WIP
+    dtoverlay=vc4-fkms-v3d
 
     # uncomment if you get no picture on HDMI for a default "safe" mode
     #hdmi_safe=1