sunxi-mali-mainline-driver: new package

Add allwinner mali kernel driver package.  Used in combination with
userspace Allwinner openGL libraries, it gives possibility to use 3D openGL
SoC acceleration.

[Peter: Rename to sunxi-mali-mainline-driver.  Use revision selection from
	sunxi-mali-mainline package.  Depend on that package and default to
	y if dependencies are met. Tweak Linux config]
Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -732,6 +732,7 @@ F:	package/webp/
 
 N:	Giulio Benetti <giulio.benetti@micronovasrl.com>
 F:	package/sunxi-mali-mainline/
+F:	package/sunxi-mali-mainline-driver/
 
 N:	Gregory Dymarek <gregd72002@gmail.com>
 F:	package/ding-libs/

linux/linux.mk

@@ -291,6 +291,9 @@ define LINUX_KCONFIG_FIXUP_CMDS
 		$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
 		$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
 		$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
+	$(if $(BR2_PACKAGE_SUNXI_MALI_MAINLINE_DRIVER),
+		$(call KCONFIG_ENABLE_OPT,CONFIG_CMA,$(@D)/.config)
+		$(call KCONFIG_ENABLE_OPT,CONFIG_DMA_CMA,$(@D)/.config))
 	$(if $(BR2_PACKAGE_IPTABLES),
 		$(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_IPTABLES,$(@D)/.config)
 		$(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_FILTER,$(@D)/.config)

package/Config.in

@@ -505,6 +505,7 @@ endmenu
 	source "package/sunxi-cedarx/Config.in"
 	source "package/sunxi-mali/Config.in"
 	source "package/sunxi-mali-mainline/Config.in"
+	source "package/sunxi-mali-mainline-driver/Config.in"
 	source "package/sysstat/Config.in"
 	source "package/targetcli-fb/Config.in"
 	source "package/ti-gfx/Config.in"

package/sunxi-mali-mainline-driver/Config.in

@@ -0,0 +1,25 @@
+comment "sunxi-mali-mainline-driver needs a Linux kernel to be built"
+	depends on BR2_PACKAGE_SUNXI_MALI_MAINLINE
+	depends on !BR2_LINUX_KERNEL
+
+config BR2_PACKAGE_SUNXI_MALI_MAINLINE_DRIVER
+	bool "sunxi-mali-mainline-driver"
+	default y
+	depends on BR2_PACKAGE_SUNXI_MALI_MAINLINE # runtime
+	depends on BR2_LINUX_KERNEL
+	select BR2_LINUX_NEEDS_MODULES # not using kernel-module infra
+	help
+	  This package builds and installs the Linux kernel driver for
+	  the Mali GPU on Allwinner platforms, compatible with recent
+	  Linux kernels (>= 4.4). Note that it should be installed
+	  together with the corresponding userspace OpenGL libraries,
+	  which are provided as binaries only at:
+	  https://github.com/free-electrons/mali-blobs
+
+	  sunxi-mali-mainline-driver requires a Linux kernel >= 4.4
+	  with the following options enabled:
+
+	  - CONFIG_CMA
+	  - CONFIG_DMA_CMA
+
+	  https://github.com/mripard/sunxi-mali/blob/master/README.md

package/sunxi-mali-mainline-driver/sunxi-mali-mainline-driver.mk

@@ -0,0 +1,26 @@
+################################################################################
+#
+# sunxi-mali-mainline-driver
+#
+################################################################################
+
+SUNXI_MALI_MAINLINE_DRIVER_VERSION = 42c7c139c14103a83bb2ad7e7a1f0ed491f96500
+SUNXI_MALI_MAINLINE_DRIVER_SITE = $(call github,mripard,sunxi-mali,$(SUNXI_MALI_MAINLINE_DRIVER_VERSION))
+SUNXI_MALI_MAINLINE_DRIVER_DEPENDENCIES = linux
+
+SUNXI_MALI_MAINLINE_DRIVER_MAKE_OPTS = \
+	KDIR=$(LINUX_DIR) \
+	CROSS_COMPILE=$(TARGET_CROSS) \
+	INSTALL_MOD_PATH=$(TARGET_DIR)
+
+define SUNXI_MALI_MAINLINE_DRIVER_BUILD_CMDS
+	cd $(@D) && $(SUNXI_MALI_MAINLINE_DRIVER_MAKE_OPTS) \
+		$(SHELL) ./build.sh -r $(SUNXI_MALI_MAINLINE_REV) -b
+endef
+
+define SUNXI_MALI_MAINLINE_DRIVER_INSTALL_TARGET_CMDS
+	cd $(@D) && $(SUNXI_MALI_MAINLINE_DRIVER_MAKE_OPTS) \
+		$(SHELL) ./build.sh -r $(SUNXI_MALI_MAINLINE_REV) -i
+endef
+
+$(eval $(generic-package))