drivers: mipi_dbi: add mipi_dbi_rpi_pico_pio

Add mipi_dbi driver for MIPI_DBI_MODE_8080_BUS_8/9/16_BIT using PIO and DMA

Signed-off-by: Christoph Schnetzler <schnetzler.christoph@gmail.com>

Author: Christoph Schnetzler

drivers/mipi_dbi/CMakeLists.txt

@@ -9,6 +9,7 @@ zephyr_sources_ifdef(CONFIG_MIPI_DBI_NXP_LCDIC mipi_dbi_nxp_lcdic.c)
 zephyr_sources_ifdef(CONFIG_MIPI_DBI_NXP_FLEXIO_LCDIF mipi_dbi_nxp_flexio_lcdif.c)
 zephyr_sources_ifdef(CONFIG_MIPI_DBI_NXP_DCNANO_LCDIF mipi_dbi_nxp_dcnano_lcdif.c)
 zephyr_sources_ifdef(CONFIG_MIPI_DBI_STM32_FMC mipi_dbi_stm32_fmc.c)
+zephyr_sources_ifdef(CONFIG_MIPI_DBI_RPI_PICO_PIO mipi_dbi_rpi_pico_pio.c)
 # Data bus width is used by the SDK driver and processes it as a compile time option
 if(CONFIG_MIPI_DBI_NXP_FLEXIO_LCDIF)
   dt_chosen(flexio0_lcd PROPERTY "zephyr,display")

drivers/mipi_dbi/Kconfig

@@ -28,5 +28,6 @@ source "drivers/mipi_dbi/Kconfig.nxp_lcdic"
 source "drivers/mipi_dbi/Kconfig.nxp_flexio_lcdif"
 source "drivers/mipi_dbi/Kconfig.stm32_fmc"
 source "drivers/mipi_dbi/Kconfig.nxp_dcnano_lcdif"
+source "drivers/mipi_dbi/Kconfig.rpi_pico"
 
 endif

drivers/mipi_dbi/Kconfig.rpi_pico

@@ -0,0 +1,21 @@
+# Copyright 2025 Christoph Schnetzler
+# SPDX-License-Identifier: Apache-2.0
+
+config MIPI_DBI_RPI_PICO_PIO
+	bool "MIPI DBI driver using PIO"
+	default y
+	depends on DT_HAS_RASPBERRYPI_PICO_MIPI_DBI_PIO_ENABLED
+	select GPIO
+	select PICOSDK_USE_PIO
+	select PICOSDK_USE_DMA
+	help
+	  Enable support for MIPI DBI driver. This driver implements
+	  a MIPI-DBI mode B compatible controller using PIO and DMA.
+
+config MIPI_DBI_RPI_PICO_PIO_CLOCK_DIV
+	int "Clock divisor for PIO state machine"
+	default 1
+	range 1 65536
+	help
+	  Rather than slowing the system clock itself, the clock divider redefines how many system clock periods are considered
+	  to be "one cycle", for execution purposes.