drm/sun4i: add a Kconfig option for sun4i-backend

As sun4i-backend is now a dedicated module, add an Kconfig option for
it to make it optional, since some build may only use other engines.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index a4b357db8856f436b843811f18d05ebcfde8911a..5a8227f37cc4223940b54c18e603a92bd3e079e8 100644 (file)
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -12,3 +12,13 @@ config DRM_SUN4I
          Choose this option if you have an Allwinner SoC with a
          Display Engine. If M is selected the module will be called
          sun4i-drm.
+
+config DRM_SUN4I_BACKEND
+       tristate "Support for Allwinner A10 Display Engine Backend"
+       depends on DRM_SUN4I
+       default DRM_SUN4I
+       help
+         Choose this option if you have an Allwinner SoC with the
+         original Allwinner Display Engine, which has a backend to
+         do some alpha blending and feed graphics to TCON. If M is
+         selected the module will be called sun4i-backend.

diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index a251fb36c951a00721165b2539f85447287dd59e..da561d064ab870747c78568044c8cd9086de7b37 100644 (file)
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -9,6 +9,7 @@ sun4i-tcon-y += sun4i_crtc.o
 sun4i-backend-y += sun4i_backend.o sun4i_layer.o
 
 obj-$(CONFIG_DRM_SUN4I)                += sun4i-drm.o sun4i-tcon.o
-obj-$(CONFIG_DRM_SUN4I)                += sun4i-backend.o
 obj-$(CONFIG_DRM_SUN4I)                += sun6i_drc.o
 obj-$(CONFIG_DRM_SUN4I)                += sun4i_tv.o
+
+obj-$(CONFIG_DRM_SUN4I_BACKEND)                += sun4i-backend.o