[yocto] [meta-raspberrypi][PATCH 4/8] Support for vc4 graphics driver: add kernel configuration options needed for VC4

[Herve Jourdain]

This patch series enables the support for the VC4 graphics driver from Eric Anholt.
Set the kernel configuration options that are required to enable the VC4 driver.

Signed-off-by: Herve Jourdain <herve.jourdain at neuf.fr>
---
 recipes-kernel/linux/linux-rpi.inc | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/recipes-kernel/linux/linux-rpi.inc b/recipes-kernel/linux/linux-rpi.inc
index fae78b7..9b91bd5 100644
--- a/recipes-kernel/linux/linux-rpi.inc
+++ b/recipes-kernel/linux/linux-rpi.inc
@@ -107,6 +107,16 @@ do_configure_prepend() {
     # Activate CONFIG_LEGACY_PTYS
     kernel_configure_variable LEGACY_PTYS y
 
+    # Activate the configuration options for VC4
+    VC4GRAPHICS="${@bb.utils.contains("MACHINE_FEATURES", "vc4graphics", "1", "0", d)}"
+    if [ ${VC4GRAPHICS} = "1" ]; then
+        kernel_configure_variable I2C_BCM2835 y
+        kernel_configure_variable DRM y
+        kernel_configure_variable DRM_FBDEV_EMULATION n
+        kernel_configure_variable DRM_VC4 y
+        kernel_configure_variable FB_BCM2708 n
+    fi
+
     # Keep this the last line
     # Remove all modified configs and add the rest to .config
     sed -e "${CONF_SED_SCRIPT}" < '${WORKDIR}/defconfig' >> '${B}/.config'
-- 
2.7.4