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Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0796-overlays-Add-overlay-for-MIPI-DBI-displays.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.15/950-0796-overlays-Add-overlay-for-MIPI-DBI-displays.patch280
1 files changed, 280 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0796-overlays-Add-overlay-for-MIPI-DBI-displays.patch b/target/linux/bcm27xx/patches-5.15/950-0796-overlays-Add-overlay-for-MIPI-DBI-displays.patch
new file mode 100644
index 0000000000..d6b9cf3936
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0796-overlays-Add-overlay-for-MIPI-DBI-displays.patch
@@ -0,0 +1,280 @@
+From bf5020c3cbf3e799379c661e2f653ac572175d67 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
+Date: Mon, 7 Mar 2022 17:05:49 +0100
+Subject: [PATCH] overlays: Add overlay for MIPI DBI displays
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Add an overlay that can be used with all displays that have a
+MIPI DBI compatible controller (pixels over SPI).
+
+Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 67 +++++++
+ .../dts/overlays/mipi-dbi-spi-overlay.dts | 172 ++++++++++++++++++
+ 3 files changed, 240 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/mipi-dbi-spi-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -135,6 +135,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ midi-uart5.dtbo \
+ minipitft13.dtbo \
+ miniuart-bt.dtbo \
++ mipi-dbi-spi.dtbo \
+ mlx90640.dtbo \
+ mmc.dtbo \
+ mpu6050.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -2386,6 +2386,73 @@ Params: krnbt Set to "
+ driver without need of hciattach/btattach
+
+
++Name: mipi-dbi-spi
++Info: Overlay for SPI-connected MIPI DBI displays using the panel-mipi-dbi
++ driver. The driver will load a file /lib/firmware/panel.bin containing
++ the initialisation commands.
++
++ Example:
++ dtoverlay=mipi-dbi-spi,spi0-0,speed=70000000
++ dtparam=width=320,height=240
++ dtparam=reset-gpio=23,dc-gpio=24
++ dtparam=backlight-gpio=18
++
++ Compared to fbtft panel-mipi-dbi runs pixel data at spi-max-frequency
++ and init commands at 10MHz. This makes it possible to push the envelope
++ without messing up the controller configuration due to command
++ transmission errors.
++
++ For devices on spi1 or spi2, the interfaces should be enabled
++ with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
++
++ See https://github.com/notro/panel-mipi-dbi/wiki for more info.
++
++Load: dtoverlay=mipi-dbi-spi,<param>=<val>
++Params:
++ compatible Set the compatible string to load a different
++ firmware file. Both the panel compatible value
++ used to load the firmware file and the value
++ used to load the driver has to be set having a
++ NUL (\0) separator between them.
++ Example:
++ dtparam=compatible=mypanel\0panel-mipi-dbi-spi
++ spi<n>-<m> Configure device at spi<n>, cs<m>
++ (boolean, required)
++ speed SPI bus speed in Hz (default 32000000)
++ cpha Shifted SPI clock phase (CPHA) mode
++ cpol Inverse SPI clock polarity (CPOL) mode
++ write-only Controller is not readable
++ (ie. MISO is not wired up).
++
++ width Panel width in pixels (required)
++ height Panel height in pixels (required)
++ width-mm Panel width in mm
++ height-mm Panel height in mm
++ x-offset Panel x-offset in controller RAM
++ y-offset Panel y-offset in controller RAM
++
++ clock-frequency Panel clock frequency in Hz
++ (optional, just informational).
++
++ reset-gpio GPIO pin to be used for RESET
++ dc-gpio GPIO pin to be used for D/C
++
++ backlight-gpio GPIO pin to be used for backlight control
++ (default of none).
++ backlight-pwm PWM channel to be used for backlight control
++ (default of none). NB Disables audio headphone
++ output as that also uses PWM.
++ backlight-pwm-chan Choose channel on &pwm node for backlight
++ control (default 0).
++ backlight-pwm-gpio GPIO pin to be used for the PWM backlight. See
++ pwm-2chan for valid options (default 18).
++ backlight-pwm-func Pin function of GPIO used for the PWM backlight.
++ See pwm-2chan for valid options (default 2).
++ backlight-def-brightness
++ Set the default brightness. Normal range 1-16.
++ (default 16).
++
++
+ Name: mlx90640
+ Info: Overlay for i2c connected mlx90640 thermal camera
+ Load: dtoverlay=mlx90640
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/mipi-dbi-spi-overlay.dts
+@@ -0,0 +1,172 @@
++/*
++ * mipi-dbi-spi-overlay.dts
++ */
++
++#include <dt-bindings/gpio/gpio.h>
++
++/dts-v1/;
++/plugin/;
++
++/ {
++ compatible = "brcm,bcm2835";
++
++ spidev_fragment: fragment@0 {
++ target-path = "spi0/spidev@0";
++ __overlay__ {
++ status = "disabled";
++ };
++ };
++
++ panel_fragment: fragment@1 {
++ target = <&spi0>;
++ __overlay__ {
++ /* needed to avoid dtc warning */
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ status = "okay";
++
++ panel: panel@0 {
++ compatible = "panel", "panel-mipi-dbi-spi";
++ reg = <0>;
++ spi-max-frequency = <32000000>;
++
++ timing: panel-timing {
++ hactive = <320>;
++ vactive = <240>;
++ hback-porch = <0>;
++ vback-porch = <0>;
++
++ clock-frequency = <0>;
++ hfront-porch = <0>;
++ hsync-len = <0>;
++ vfront-porch = <0>;
++ vsync-len = <0>;
++ };
++ };
++ };
++ };
++
++ fragment@10 {
++ target = <&panel>;
++ __dormant__ {
++ backlight = <&backlight_gpio>;
++ };
++ };
++
++ fragment@11 {
++ target-path = "/";
++ __dormant__ {
++ backlight_gpio: backlight_gpio {
++ compatible = "gpio-backlight";
++ gpios = <&gpio 255 GPIO_ACTIVE_HIGH>;
++ };
++ };
++ };
++
++ fragment@20 {
++ target = <&panel>;
++ __dormant__ {
++ backlight = <&backlight_pwm>;
++ };
++ };
++
++ fragment@21 {
++ target-path = "/";
++ __dormant__ {
++ backlight_pwm: backlight_pwm {
++ compatible = "pwm-backlight";
++ brightness-levels = <0 6 8 12 16 24 32 40 48 64 96 128 160 192 224 255>;
++ default-brightness-level = <16>;
++ pwms = <&pwm 0 200000>;
++ };
++ };
++ };
++
++ fragment@22 {
++ target = <&pwm>;
++ __dormant__ {
++ pinctrl-names = "default";
++ pinctrl-0 = <&pwm_pins>;
++ assigned-clock-rates = <1000000>;
++ status = "okay";
++ };
++ };
++
++ fragment@23 {
++ target = <&gpio>;
++ __dormant__ {
++ pwm_pins: pwm_pins {
++ brcm,pins = <18>;
++ brcm,function = <2>; /* Alt5 */
++ };
++ };
++ };
++
++ fragment@24 {
++ target = <&audio>;
++ __dormant__ {
++ brcm,disable-headphones;
++ };
++ };
++
++ __overrides__ {
++ compatible = <&panel>, "compatible";
++
++ spi0-0 = <&panel_fragment>, "target:0=",<&spi0>,
++ <&spidev_fragment>, "target-path=spi0/spidev@0",
++ <&panel>, "reg:0=0";
++ spi0-1 = <&panel_fragment>, "target:0=",<&spi0>,
++ <&spidev_fragment>, "target-path=spi0/spidev@1",
++ <&panel>, "reg:0=1";
++ spi1-0 = <&panel_fragment>, "target:0=",<&spi1>,
++ <&spidev_fragment>, "target-path=spi1/spidev@0",
++ <&panel>, "reg:0=0";
++ spi1-1 = <&panel_fragment>, "target:0=",<&spi1>,
++ <&spidev_fragment>, "target-path=spi1/spidev@1",
++ <&panel>, "reg:0=1";
++ spi1-2 = <&panel_fragment>, "target:0=",<&spi1>,
++ <&spidev_fragment>, "target-path=spi1/spidev@2",
++ <&panel>, "reg:0=2";
++ spi2-0 = <&panel_fragment>, "target:0=",<&spi2>,
++ <&spidev_fragment>, "target-path=spi2/spidev@0",
++ <&panel>, "reg:0=0";
++ spi2-1 = <&panel_fragment>, "target:0=",<&spi2>,
++ <&spidev_fragment>, "target-path=spi2/spidev@1",
++ <&panel>, "reg:0=1";
++ spi2-2 = <&panel_fragment>, "target:0=",<&spi2>,
++ <&spidev_fragment>, "target-path=spi2/spidev@2",
++ <&panel>, "reg:0=2";
++
++ speed = <&panel>, "spi-max-frequency:0";
++ cpha = <&panel>, "spi-cpha?";
++ cpol = <&panel>, "spi-cpol?";
++
++ write-only = <&panel>, "write-only?";
++
++ width = <&timing>, "hactive:0";
++ height = <&timing>, "vactive:0";
++ x-offset = <&timing>, "hback-porch:0";
++ y-offset = <&timing>, "vback-porch:0";
++ clock-frequency = <&timing>, "clock-frequency:0";
++
++ width-mm = <&panel>, "width-mm:0";
++ height-mm = <&panel>, "height-mm:0";
++
++ /* optional gpios */
++ reset-gpio = <&panel>, "reset-gpios:0=", <&gpio>,
++ <&panel>, "reset-gpios:4",
++ <&panel>, "reset-gpios:8=0"; /* GPIO_ACTIVE_HIGH */
++ dc-gpio = <&panel>, "dc-gpios:0=", <&gpio>,
++ <&panel>, "dc-gpios:4",
++ <&panel>, "dc-gpios:8=0"; /* GPIO_ACTIVE_HIGH */
++
++ backlight-gpio = <0>, "+10+11",
++ <&backlight_gpio>, "gpios:4";
++ backlight-pwm = <0>, "+20+21+22+23+24";
++ backlight-pwm-chan = <&backlight_pwm>, "pwms:4";
++ backlight-pwm-gpio = <&pwm_pins>, "brcm,pins:0";
++ backlight-pwm-func = <&pwm_pins>, "brcm,function:0";
++ backlight-def-brightness = <&backlight_pwm>, "default-brightness-level:0";
++ };
++};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 21:42:47 +0000