package/mesa3d: rework dri3 handling

While fixing a build error

../src/egl/drivers/dri2/platform_x11.c: In function 'dri2_x11_get_msc_rate':
../src/egl/drivers/dri2/platform_x11.c:1229:44:
 error: 'struct dri2_egl_display' has no member named 'screen_resources'

with this defconfig:

BR2_x86_64=y
BR2_TOOLCHAIN_BUILDROOT_CXX=y
BR2_PACKAGE_MESA3D=y
BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_IRIS=y
BR2_PACKAGE_MESA3D_OPENGL_GLX=y
BR2_PACKAGE_MESA3D_OPENGL_EGL=y
BR2_PACKAGE_MESA3D_OPENGL_ES=y
BR2_PACKAGE_XORG7=y

(crocus and i915 drivers are also affected) it turns out that we can
assume the need for dri3 support when X.org is enabled as a hard depen-
dency even if mesa3d's configure does not throw errors when missing,
like for the Intel drivers.

Before this patch these Config.in options were used:

config BR2_PACKAGE_MESA3D_DRI3
  select BR2_PACKAGE_XLIB_LIBXSHMFENCE
select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7

which can be translated into:

select BR2_PACKAGE_XLIB_LIBXSHMFENCE if BR2_PACKAGE_XORG7

and used at option BR2_PACKAGE_MESA3D_DRIVER.

Configure option -Ddri3=enabled is passed to mesa3d when at least one
driver is enabled along with X.org:
ifeq ($(BR2_PACKAGE_MESA3D_DRIVER)$(BR2_PACKAGE_XORG7),yy)

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit e2f87b3c15c100a411d277589ba8de1de564efd4)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/mesa3d/Config.in

@@ -56,11 +56,7 @@ config BR2_PACKAGE_MESA3D_OPENCL
 	select BR2_PACKAGE_LIBCLC
 	select BR2_PACKAGE_HAS_LIBOPENCL
 
-# inform the .mk file of gallium, dri, dri3 or vulkan driver selection
-config BR2_PACKAGE_MESA3D_DRI3
-	bool
-	select BR2_PACKAGE_XLIB_LIBXSHMFENCE
-
+# inform the .mk file of gallium or vulkan driver selection
 config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	bool
 	select BR2_PACKAGE_MESA3D_DRIVER
@@ -71,6 +67,7 @@ config BR2_PACKAGE_MESA3D_VULKAN_DRIVER
 
 config BR2_PACKAGE_MESA3D_DRIVER
 	bool
+	select BR2_PACKAGE_XLIB_LIBXSHMFENCE if BR2_PACKAGE_XORG7
 
 # Gallium xa state tracker.
 # Quote from mesa3d meson.build: "XA state tracker requires at least
@@ -103,7 +100,6 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_CROCUS
 config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_ETNAVIV
 	bool "Gallium Etnaviv driver"
 	depends on (BR2_TOOLCHAIN_HAS_SYNC_4 && !BR2_RISCV_32) || !BR2_PACKAGE_XORG7 # libxshmfence
-	select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	select BR2_PACKAGE_LIBDRM_ETNAVIV
 	help
@@ -117,7 +113,6 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_FREEDRENO
 	# can't see is just spurious. However, that dependency is about
 	# the toolchain having sync4 primitives, which is always a given
 	# for arm/aarch64.
-	select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	select BR2_PACKAGE_LIBDRM_FREEDRENO
 	help
@@ -141,7 +136,6 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_IRIS
 config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_LIMA
 	bool "Gallium lima driver"
 	depends on (BR2_TOOLCHAIN_HAS_SYNC_4 && !BR2_RISCV_32) || !BR2_PACKAGE_XORG7 # libxshmfence
-	select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	help
 	  Mesa driver for ARM Mali Utgard GPUs.
@@ -158,7 +152,6 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_NOUVEAU
 config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_PANFROST
 	bool "Gallium panfrost driver"
 	depends on (BR2_TOOLCHAIN_HAS_SYNC_4 && !BR2_RISCV_32) || !BR2_PACKAGE_XORG7 # libxshmfence
-	select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	help
 	  Mesa driver for ARM Mali Midgard and Bifrost GPUs.
@@ -239,7 +232,6 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_V3D
 	bool "Gallium v3d driver"
 	depends on (BR2_arm && BR2_ARM_CPU_HAS_NEON) || BR2_aarch64
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || !BR2_PACKAGE_XORG7 # libxshmfence
-	select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_VC4 # runtime
 	select BR2_PACKAGE_MESA3D_OPENGL_EGL
@@ -255,7 +247,6 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_VC4
 	bool "Gallium vc4 driver"
 	depends on (BR2_arm && BR2_ARM_CPU_HAS_NEON) || BR2_aarch64
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || !BR2_PACKAGE_XORG7 # libxshmfence
-	select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	select BR2_PACKAGE_LIBDRM_VC4
 	select BR2_PACKAGE_MESA3D_OPENGL_EGL
@@ -295,7 +286,6 @@ config BR2_PACKAGE_MESA3D_VULKAN_DRIVER_BROADCOM
 	bool "Vulkan broadcom driver"
 	depends on BR2_arm || BR2_aarch64
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # dri3/libxshmfence
-	select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7
 	select BR2_PACKAGE_MESA3D_VULKAN_DRIVER
 	help
 	  Vulkan broadcom driver.
@@ -306,7 +296,6 @@ config BR2_PACKAGE_MESA3D_VULKAN_DRIVER_INTEL
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || !BR2_PACKAGE_XORG7 # libxshmfence
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17 # memfd.h
 	depends on BR2_TOOLCHAIN_USES_GLIBC # ifunc, static_assert
-	select BR2_PACKAGE_MESA3D_DRI3 if BR2_PACKAGE_XORG7
 	select BR2_PACKAGE_MESA3D_VULKAN_DRIVER
 	help
 	  Vulkan driver for Intel hardware from Ivy Bridge onward.

package/mesa3d/mesa3d.mk

@@ -29,11 +29,9 @@ MESA3D_CONF_OPTS = \
 	-Dgallium-omx=disabled \
 	-Dpower8=disabled
 
-ifeq ($(BR2_PACKAGE_MESA3D_DRI3),y)
+ifeq ($(BR2_PACKAGE_MESA3D_DRIVER)$(BR2_PACKAGE_XORG7),yy)
 MESA3D_CONF_OPTS += -Ddri3=enabled
-ifeq ($(BR2_PACKAGE_XLIB_LIBXSHMFENCE),y)
 MESA3D_DEPENDENCIES += xlib_libxshmfence
-endif
 else
 MESA3D_CONF_OPTS += -Ddri3=disabled
 endif