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bcm27xx/bcm2712: add RP1 drivers via kmods

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Add kmods for the following RP1 options that not all users
will necessarily need or want compiled in:
* Composite video
* Display video
* LED control
* PWM control
* Serial video

Build system: x86/64
Build-tested: bcm2712/RPi5B
Run-tested: bcm2712/RPi5B

Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/17233
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
John Audia 2024-12-11 15:06:30 -05:00 committed by Robert Marko
parent 87309edba4
commit d6c5805db3
2 changed files with 115 additions and 0 deletions
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37
target/linux/bcm27xx/modules/other.mk
View File

@ -53,3 +53,40 @@ define KernelPackage/smi-bcm2835-dev/description
endef
$(eval $(call KernelPackage,smi-bcm2835-dev))
define KernelPackage/pwm-pio-rp1
SUBMENU:=$(OTHER_MENU)
TITLE:=RP1 PWM support
KCONFIG:=CONFIG_PWM_PIO_RP1
FILES:=$(LINUX_DIR)/drivers/pwm/pwm-pio-rp1.ko
AUTOLOAD:=$(call AutoLoad,21,pwm-pio-rp1)
DEPENDS:=@TARGET_bcm27xx_bcm2712
endef
define KernelPackage/pwm-pio-rp1/description
Enables precise control of PWM signals for tasks like motor control,
LED dimming, and audio signal generation. Leveraging PIO allows for
higher accuracy and flexibility in PWM signal generation compared
to traditional hardware timers.
endef
$(eval $(call KernelPackage,pwm-pio-rp1))
define KernelPackage/ws2812-pio-rp1
SUBMENU:=$(OTHER_MENU)
TITLE:=RP1 PIO-base WS2812 driver
KCONFIG:=CONFIG_WS2812_PIO_RP1
FILES:=$(LINUX_DIR)/drivers/misc/ws2812-pio-rp1.ko
AUTOLOAD:=$(call AutoLoad,21,ws2812-pio-rp1)
DEPENDS:=@TARGET_bcm27xx_bcm2712
endef
define KernelPackage/ws2812-pio-rp1/description
Driver for the WS2812 (NeoPixel) LEDs using the RP1 PIO hardware.
The driver creates a character device to which rgbw pixels may be
written. Single-byte writes to offset 0 set the brightness at runtime.
endef
$(eval $(call KernelPackage,ws2812-pio-rp1))

78
target/linux/bcm27xx/modules/video.mk
View File

@ -115,3 +115,81 @@ define KernelPackage/vchiq-mmal-bcm2835/description
endef
$(eval $(call KernelPackage,vchiq-mmal-bcm2835))
define KernelPackage/drm-rp1-dsi
SUBMENU:=$(VIDEO_MENU)
TITLE:=RP1 Display Serial Interface for Video
KCONFIG:= \
CONFIG_DRM_RP1_DSI \
CONFIG_DRM_GEM_DMA_HELPER \
CONFIG_DRM_KMS_HELPER \
CONFIG_DRM_MIPI_DSI=y \
CONFIG_DRM_VRAM_HELPER=n \
CONFIG_DRM_TTM=n \
CONFIG_DRM_TTM_HELPER=n \
CONFIG_GENERIC_PHY_MIPI_DPHY=n \
CONFIG_DRM_WERROR=n
FILES:=$(LINUX_DIR)/drivers/gpu/drm/rp1/rp1-dsi/drm-rp1-dsi.ko
AUTOLOAD:=$(call AutoLoad,67,drm-rp1-dsi)
DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-drm-vc4
endef
define KernelPackage/drm-rp1-dsi/description
This module manages the DSI for driving high-resolution LCD panels
such as the official Raspberry Pi displays or other screens that
use the DSI interface.
endef
$(eval $(call KernelPackage,drm-rp1-dsi))
define KernelPackage/drm-rp1-dpi
SUBMENU:=$(VIDEO_MENU)
TITLE:=RP1 Display Parallel Interface for Video
KCONFIG:= \
CONFIG_DRM_RP1_DPI \
CONFIG_DRM_GEM_DMA_HELPER \
CONFIG_DRM_KMS_HELPER \
CONFIG_DRM_VRAM_HELPER=n \
CONFIG_DRM_TTM=n \
CONFIG_DRM_TTM_HELPER=n
FILES:=$(LINUX_DIR)/drivers/gpu/drm/rp1/rp1-dpi/drm-rp1-dpi.ko
AUTOLOAD:=$(call AutoLoad,67,drm-rp1-dpi)
DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-drm-vc4
endef
define KernelPackage/drm-rp1-dpi/description
This module is or driving displays using the DPI standard.
Useful for interfacing with custom or low-level LCD panels
that require parallel RGB signals. Provides direct control
over the timing and signal driving of raw LCD panels.
Typically used in maker projects or with non-HDMI displays.
endef
$(eval $(call KernelPackage,drm-rp1-dpi))
define KernelPackage/drm-rp1-vec
SUBMENU:=$(VIDEO_MENU)
TITLE:=RP1 Display Composite Video
KCONFIG:= \
CONFIG_DRM_RP1_VEC \
CONFIG_DRM_GEM_DMA_HELPER \
CONFIG_DRM_KMS_HELPER \
CONFIG_DRM_VRAM_HELPER=n \
CONFIG_DRM_TTM=n \
CONFIG_DRM_TTM_HELPER=n
FILES:=$(LINUX_DIR)/drivers/gpu/drm/rp1/rp1-vec/drm-rp1-vec.ko
AUTOLOAD:=$(call AutoLoad,67,drm-rp1-vec)
DEPENDS:=@TARGET_bcm27xx_bcm2712 +kmod-drm-vc4
endef
define KernelPackage/drm-rp1-vec/description
This module is used for composite video output, which is typically
transmitted through the RCA jack. Primary use is onnecting older
TVs or monitors that rely on analog signals via a composite interface.
Handles standard-definition analog signals in NTSC and PAL.
endef
$(eval $(call KernelPackage,drm-rp1-vec))