drm: apple: backlight: force backlight update after resume

MAINTAINERS

@@ -1444,6 +1444,13 @@ L:	linux-input@vger.kernel.org
 S:	Odd fixes
 F:	drivers/input/mouse/bcm5974.c
 
+APPLE DRM DISPLAY DRIVER
+M:	Alyssa Rosenzweig <alyssa@rosenzweig.io>
+L:	dri-devel@lists.freedesktop.org
+S:	Maintained
+T:	git git://anongit.freedesktop.org/drm/drm-misc
+F:	drivers/gpu/drm/apple/
+
 APPLE PCIE CONTROLLER DRIVER
 M:	Alyssa Rosenzweig <alyssa@rosenzweig.io>
 M:	Marc Zyngier <maz@kernel.org>

drivers/gpu/drm/Kconfig

@@ -387,6 +387,8 @@ source "drivers/gpu/drm/solomon/Kconfig"
 
 source "drivers/gpu/drm/sprd/Kconfig"
 
+source "drivers/gpu/drm/apple/Kconfig"
+
 config DRM_HYPERV
 	tristate "DRM Support for Hyper-V synthetic video device"
 	depends on DRM && PCI && MMU && HYPERV

drivers/gpu/drm/Makefile

@@ -189,6 +189,7 @@ obj-$(CONFIG_DRM_XEN) += xen/
 obj-$(CONFIG_DRM_VBOXVIDEO) += vboxvideo/
 obj-$(CONFIG_DRM_LIMA)  += lima/
 obj-$(CONFIG_DRM_PANFROST) += panfrost/
+obj-$(CONFIG_DRM_APPLE) += apple/
 obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
 obj-$(CONFIG_DRM_MCDE) += mcde/
 obj-$(CONFIG_DRM_TIDSS) += tidss/

drivers/gpu/drm/apple/.gitignore

@@ -0,0 +1 @@
+*.hdrtest

drivers/gpu/drm/apple/Kconfig

@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0-only OR MIT
+config DRM_APPLE
+	tristate "DRM Support for Apple display controllers"
+	depends on DRM && OF && ARM64
+	depends on ARCH_APPLE || COMPILE_TEST
+	depends on SND
+	select DRM_KMS_HELPER
+	select DRM_KMS_DMA_HELPER
+	select DRM_GEM_DMA_HELPER
+	select VIDEOMODE_HELPERS
+	select MULTIPLEXER
+	select SND_PCM
+	help
+	  Say Y if you have an Apple Silicon chipset.

drivers/gpu/drm/apple/Makefile

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0-only OR MIT
+
+CFLAGS_trace.o = -I$(src)
+
+appledrm-y := apple_drv.o
+
+apple_dcp-y := afk.o dcp.o dcp_backlight.o dptxep.o iomfb.o parser.o systemep.o
+apple_dcp-y += ibootep.o
+apple_dcp-y += iomfb_v12_3.o
+apple_dcp-y += iomfb_v13_3.o
+apple_dcp-$(CONFIG_TRACING) += trace.o
+
+
+obj-$(CONFIG_DRM_APPLE) += appledrm.o
+obj-$(CONFIG_DRM_APPLE) += apple_dcp.o
+
+# header test
+
+# exclude some broken headers from the test coverage
+no-header-test := \
+
+always-y += \
+	$(patsubst %.h,%.hdrtest, $(filter-out $(no-header-test), \
+		$(shell cd $(srctree)/$(src) && find * -name '*.h')))
+
+quiet_cmd_hdrtest = HDRTEST $(patsubst %.hdrtest,%.h,$@)
+      cmd_hdrtest = $(CC) $(filter-out $(CFLAGS_GCOV), $(c_flags)) -S -o /dev/null -x c /dev/null -include $<; touch $@
+
+$(obj)/%.hdrtest: $(src)/%.h FORCE
+	$(call if_changed_dep,hdrtest)