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Merge pull request #63 from adafruit/st7789

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St7789 mini pitft support
This commit is contained in:
Limor "Ladyada" Fried 2019-10-23 15:27:55 -04:00 committed by GitHub
commit a76596aa98
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 584 additions and 69 deletions
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154
adafruit-pitft.sh
View file

@ -8,9 +8,9 @@
# sudo ./adafruit-pitft.sh
if [ $(id -u) -ne 0 ]; then
echo "Installer must be run as root."
echo "Try 'sudo bash $0'"
exit 1
echo "Installer must be run as root."
echo "Try 'sudo bash $0'"
exit 1
fi
@ -49,7 +49,7 @@ TRANSFORM_28c270="0 -1 1 1 0 0 0 0 1"
warning() {
echo WARNING : $1
echo WARNING : $1
}
############################ Script assisters ############################
@ -58,19 +58,19 @@ warning() {
# preceded by a number (1 to N), display a prompt, check input until
# a valid number within the selection range is entered.
selectN() {
for ((i=1; i<=$#; i++)); do
echo $i. ${!i}
done
echo
REPLY=""
while :
do
echo -n "SELECT 1-$#: "
read
if [[ $REPLY -ge 1 ]] && [[ $REPLY -le $# ]]; then
return $REPLY
fi
done
for ((i=1; i<=$#; i++)); do
echo $i. ${!i}
done
echo
REPLY=""
while :
do
echo -n "SELECT 1-$#: "
read
if [[ $REPLY -ge 1 ]] && [[ $REPLY -le $# ]]; then
return $REPLY
fi
done
}
@ -161,9 +161,10 @@ progress() {
sysupdate() {
if ! $UPDATE_DB; then
# echo "Checking for correct software repositories..."
# has_repo || { warning "Missing Apt repo, please add deb http://mirrordirector.raspbian.org/raspbian/ stretch main contrib non-free rpi firmware to /etc/apt/sources.list.d/raspi.list" && exit 1; }
# echo "Checking for correct software repositories..."
# has_repo || { warning "Missing Apt repo, please add deb http://mirrordirector.raspbian.org/raspbian/ stretch main contrib non-free rpi firmware to /etc/apt/sources.list.d/raspi.list" && exit 1; }
echo "Updating apt indexes..." && progress 3 &
sudo apt update 1> /dev/null || { warning "Apt failed to update indexes!" && exit 1; }
sudo apt-get update 1> /dev/null || { warning "Apt failed to update indexes!" && exit 1; }
echo "Reading package lists..."
progress 3 && UPDATE_DB=true
@ -175,14 +176,14 @@ sysupdate() {
# perform replacement if found, else append replacement to end of file.
# (# $1 = filename, $2 = pattern to match, $3 = replacement)
reconfig() {
grep $2 $1 >/dev/null
if [ $? -eq 0 ]; then
# Pattern found; replace in file
sed -i "s/$2/$3/g" $1 >/dev/null
else
# Not found; append (silently)
echo $3 | sudo tee -a $1 >/dev/null
fi
grep $2 $1 >/dev/null
if [ $? -eq 0 ]; then
# Pattern found; replace in file
sed -i "s/$2/$3/g" $1 >/dev/null
else
# Not found; append (silently)
echo $3 | sudo tee -a $1 >/dev/null
fi
}
@ -190,8 +191,8 @@ reconfig() {
function softwareinstall() {
echo "Installing Pre-requisite Software...This may take a few minutes!"
apt-get install -y libts0 1> /dev/null 2>&1 || apt-get install -y tslib 1> /dev/null 2>&1 || { warning "Apt failed to install TSLIB!" && exit 1; }
apt-get install -y bc fbi git python-dev python-pip python-smbus python-spidev evtest libts-bin 1> /dev/null || { warning "Apt failed to install software!" && exit 1; }
apt-get install -y libts0 1> /dev/null 2>&1 || apt-get install -y tslib 1> /dev/null 2>&1 || { warning "Apt failed to install TSLIB!" && exit 1; }
apt-get install -y bc fbi git python-dev python-pip python-smbus python-spidev evtest libts-bin device-tree-compiler 1> /dev/null || { warning "Apt failed to install software!" && exit 1; }
pip install evdev 1> /dev/null || { warning "Pip failed to install software!" && exit 1; }
}
@ -199,9 +200,9 @@ function softwareinstall() {
function update_configtxt() {
if grep -q "adafruit-pitft-helper" "/boot/config.txt"; then
echo "Already have an adafruit-pitft-helper section in /boot/config.txt."
echo "Removing old section..."
echo "Removing old section..."
cp /boot/config.txt /boot/configtxt.bak
sed -i -e "/^# --- added by adafruit-pitft-helper/,/^# --- end adafruit-pitft-helper/d" /boot/config.txt
sed -i -e "/^# --- added by adafruit-pitft-helper/,/^# --- end adafruit-pitft-helper/d" /boot/config.txt
fi
# remove any old flexfb/fbtft stuff
@ -239,6 +240,19 @@ EOF
overlay=""
fi
if [ "${pitfttype}" == "st7789_240x135" ]; then
dtc -@ -I dts -O dtb -o /boot/overlays/drm-minipitft114.dtbo overlays/minipitft114-overlay.dts
echo "############# UPGRADING KERNEL ###############"
sudo apt update || { warning "Apt failed to update itself!" && exit 1; }
sudo apt-get upgrade || { warning "Apt failed to install software!" && exit 1; }
apt-get install -y raspberrypi-kernel-headers 1> /dev/null || { warning "Apt failed to install software!" && exit 1; }
[ -d /lib/modules/$(uname -r)/build ] || { warning "Kernel was updated, please reboot now and re-run script!" && exit 1; }
cd st7789_module
make -C /lib/modules/$(uname -r)/build M=$(pwd) modules || { warning "Apt failed to compile ST7789V driver!" && exit 1; }
mv /lib/modules/$(uname -r)/kernel/drivers/gpu/drm/tinydrm/mi0283qt.ko /lib/modules/$(uname -r)/kernel/drivers/gpu/drm/tinydrm/mi0283qt.BACK
mv st7789v_ada.ko /lib/modules/$(uname -r)/kernel/drivers/gpu/drm/tinydrm/mi0283qt.ko
overlay="dtoverlay=drm-minipitft114,rotation=${pitftrot}"
fi
date=`date`
@ -362,8 +376,8 @@ function install_fbcp() {
# if there's X11 installed...
if [ -e /etc/lightdm ]; then
echo "Setting raspi-config to boot to desktop w/o login..."
raspi-config nonint do_boot_behaviour B4
echo "Setting raspi-config to boot to desktop w/o login..."
raspi-config nonint do_boot_behaviour B4
fi
# Disable overscan compensation (use full screen):
@ -376,39 +390,39 @@ function install_fbcp() {
# if there's X11 installed...
if [ -e /etc/lightdm ]; then
if [ "${pitfttype}" == "35r" ]; then
echo "Using x1.5 resolution"
SCALE=1.5
else
echo "Using x2 resolution"
SCALE=2.0
fi
if [ "${pitfttype}" == "35r" ]; then
echo "Using x1.5 resolution"
SCALE=1.5
else
echo "Using x2 resolution"
SCALE=2.0
fi
else
echo "Using native resolution"
SCALE=1
echo "Using native resolution"
SCALE=1
fi
WIDTH=`python -c "print(int(${WIDTH_VALUES[PITFT_SELECT-1]} * ${SCALE}))"`
HEIGHT=`python -c "print(int(${HEIGHT_VALUES[PITFT_SELECT-1]} * ${SCALE}))"`
reconfig /boot/config.txt "^.*hdmi_cvt.*$" "hdmi_cvt=${WIDTH} ${HEIGHT} 60 1 0 0 0"
if [ "${pitftrot}" == "90" ] || [ "${pitftrot}" == "270" ]; then
# dont rotate HDMI on 90 or 270
reconfig /boot/config.txt "^.*display_hdmi_rotate.*$" ""
# dont rotate HDMI on 90 or 270
reconfig /boot/config.txt "^.*display_hdmi_rotate.*$" ""
fi
if [ "${pitftrot}" == "0" ]; then
reconfig /boot/config.txt "^.*display_hdmi_rotate.*$" "display_hdmi_rotate=1"
# this is a hack but because we rotate HDMI we have to 'unrotate' the TFT!
pitftrot=90
update_configtxt || bail "Unable to update /boot/config.txt"
pitftrot=0
reconfig /boot/config.txt "^.*display_hdmi_rotate.*$" "display_hdmi_rotate=1"
# this is a hack but because we rotate HDMI we have to 'unrotate' the TFT!
pitftrot=90
update_configtxt || bail "Unable to update /boot/config.txt"
pitftrot=0
fi
if [ "${pitftrot}" == "180" ]; then
reconfig /boot/config.txt "^.*display_hdmi_rotate.*$" "display_hdmi_rotate=3"
# this is a hack but because we rotate HDMI we have to 'unrotate' the TFT!
pitftrot=90
update_configtxt || bail "Unable to update /boot/config.txt"
pitftrot=180
reconfig /boot/config.txt "^.*display_hdmi_rotate.*$" "display_hdmi_rotate=3"
# this is a hack but because we rotate HDMI we have to 'unrotate' the TFT!
pitftrot=90
update_configtxt || bail "Unable to update /boot/config.txt"
pitftrot=180
fi
}
@ -449,8 +463,8 @@ function uninstall_fbcp_rclocal() {
function update_xorg() {
if [ "${pitfttype}" == "28r" ] || [ "${pitfttype}" == "35r" ]; then
matrix=$(eval echo "\$TRANSFORM_$pitfttype$pitftrot")
transform="Option \"TransformationMatrix\" \"${matrix}\""
matrix=$(eval echo "\$TRANSFORM_$pitfttype$pitftrot")
transform="Option \"TransformationMatrix\" \"${matrix}\""
cat > /usr/share/X11/xorg.conf.d/20-calibration.conf <<EOF
Section "InputClass"
Identifier "STMPE Touchscreen Calibration"
@ -463,8 +477,8 @@ EOF
fi
if [ "${pitfttype}" == "28c" ]; then
matrix=$(eval echo "\$TRANSFORM_$pitfttype$pitftrot")
transform="Option \"TransformationMatrix\" \"${matrix}\""
matrix=$(eval echo "\$TRANSFORM_$pitfttype$pitftrot")
transform="Option \"TransformationMatrix\" \"${matrix}\""
cat > /usr/share/X11/xorg.conf.d/20-calibration.conf <<EOF
Section "InputClass"
Identifier "FocalTech Touchscreen Calibration"
@ -495,9 +509,10 @@ selectN "PiTFT 2.4\", 2.8\" or 3.2\" resistive (240x320)" \
"PiTFT 2.8\" capacitive touch (240x320)" \
"PiTFT 3.5\" resistive touch (320x480)" \
"Braincraft 1.54\" display (240x240)" \
"MiniPiTFT 1.14\" display (240x135) - WARNING! CUTTING EDGE! WILL UPGRADE YOUR KERNEL TO LATEST" \
"Quit without installing"
PITFT_SELECT=$?
if [ $PITFT_SELECT -gt 5 ]; then
if [ $PITFT_SELECT -gt 6 ]; then
exit 1
fi
@ -512,7 +527,7 @@ if [ $PITFT_ROTATE -gt 4 ]; then
fi
PITFT_ROTATIONS=("90" "180" "270" "0")
PITFT_TYPES=("28r" "22" "28c" "35r" "st7789_240x240")
PITFT_TYPES=("28r" "22" "28c" "35r" "st7789_240x240" "st7789_240x135")
WIDTH_VALUES=(320 320 320 480 240)
HEIGHT_VALUES=(240 240 240 320 240)
HZ_VALUES=(64000000 64000000 64000000 32000000 64000000)
@ -573,13 +588,14 @@ pitfttype=${PITFT_TYPES[$PITFT_SELECT-1]}
pitftrot=${PITFT_ROTATIONS[$PITFT_ROTATE-1]}
if [ "${pitfttype}" != "28r" ] && [ "${pitfttype}" != "28c" ] && [ "${pitfttype}" != "35r" ] && [ "${pitfttype}" != "22" ] && [ "${pitfttype}" != "st7789_240x240" ]; then
if [ "${pitfttype}" != "28r" ] && [ "${pitfttype}" != "28c" ] && [ "${pitfttype}" != "35r" ] && [ "${pitfttype}" != "22" ] && [ "${pitfttype}" != "st7789_240x240" ] && [ "${pitfttype}" != "st7789_240x135" ]; then
echo "Type must be one of:"
echo " '28r' (2.8\" resistive, PID 1601)"
echo " '28c' (2.8\" capacitive, PID 1983)"
echo " '35r' (3.5\" Resistive)"
echo " '22' (2.2\" no touch)"
echo " 'st7789_240x240' (1.54\" or 1.3\" no touch)"
echo " 'st7789_240x135' 1.14\" no touch)"
echo
print_help
fi
@ -611,13 +627,13 @@ else
uninstall_console || bail "Unable to configure console"
if ask "Would you like the HDMI display to mirror to the PiTFT display?"; then
info PITFT "Adding FBCP support..."
install_fbcp || bail "Unable to configure fbcp"
info PITFT "Adding FBCP support..."
install_fbcp || bail "Unable to configure fbcp"
if [ -e /etc/lightdm ]; then
info PITFT "Updating X11 default calibration..."
update_xorg || bail "Unable to update calibration"
fi
if [ -e /etc/lightdm ]; then
info PITFT "Updating X11 default calibration..."
update_xorg || bail "Unable to update calibration"
fi
fi
fi
@ -643,8 +659,8 @@ echo
echo -n "REBOOT NOW? [y/N] "
read
if [[ ! "$REPLY" =~ ^(yes|y|Y)$ ]]; then
echo "Exiting without reboot."
exit 0
echo "Exiting without reboot."
exit 0
fi
echo "Reboot started..."
reboot

78
overlays/minipitft114-overlay.dts Normal file
View file

@ -0,0 +1,78 @@
/*
* Device Tree overlay for Adafruit Mini PiTFT 1.14" Display
*
*/
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
fragment@0 {
target = <&spi0>;
__overlay__ {
status = "okay";
spidev@0{
status = "disabled";
};
};
};
fragment@1 {
target = <&gpio>;
__overlay__ {
pitft_pins: pitft_pins {
brcm,pins = <25>; /* dc pin */
brcm,function = <1>; /* out */
brcm,pull = <0>; /* no pull */
};
};
};
fragment@2 {
target = <&spi0>;
__overlay__ {
/* needed to avoid dtc warning */
#address-cells = <1>;
#size-cells = <0>;
pitft: pitft@0{
compatible = "multi-inno,mi0283qt";
reg = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pitft_pins>;
spi-max-frequency = <32000000>;
rotation = <90>;
width = <136>;
height = <240>;
col_offset = <53>;
row_offset = <40>;
dc-gpios = <&gpio 25 0>;
backlight = <&backlight>;
};
};
};
fragment@3 {
target-path = "/soc";
__overlay__ {
backlight: backlight {
compatible = "gpio-backlight";
gpios = <&gpio 22 0>;
};
};
};
__overrides__ {
speed = <&pitft>,"spi-max-frequency:0";
rotation = <&pitft>,"rotation:0";
width = <&pitft>,"width:0";
height = <&pitft>,"height:0";
col_offset = <&pitft>,"col_offset:0";
row_offset = <&pitft>,"row_offset:0";
};
};

14
st7789_module/Makefile Normal file
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@ -0,0 +1,14 @@
obj-m+=st7789v_ada.o
KDIR ?= /lib/modules/`uname -r`/build
default:
$(MAKE) -C $(KDIR) M=$(pwd) modules
install:
$(MAKE) -C $(KDIR) M=$(PWD) modules_install
$(DEPMOD)
clean:
$(MAKE) -C $(KDIR) M=$(PWD) clean

407
st7789_module/st7789v_ada.c Normal file
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@ -0,0 +1,407 @@
/*
* DRM driver for ST7789V panels with flexible config
*
* Copyright 2019 Limor Fried
* Copyright 2016 Noralf Trønnes
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_modeset_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/tinydrm/mipi-dbi.h>
#include <drm/tinydrm/tinydrm-helpers.h>
#include <video/mipi_display.h>
#define ST77XX_MADCTL_MY 0x80
#define ST77XX_MADCTL_MX 0x40
#define ST77XX_MADCTL_MV 0x20
#define ST77XX_MADCTL_ML 0x10
#define ST77XX_MADCTL_BGR 0x08
#define ST77XX_MADCTL_RGB 0x00
static u32 col_offset = 0;
static u32 row_offset = 0;
static u8 col_hack_fix_offset = 0;
static short x_offset = 0;
static short y_offset = 0;
static void st7789vada_enable(struct drm_simple_display_pipe *pipe,
struct drm_crtc_state *crtc_state,
struct drm_plane_state *plane_state)
{
struct tinydrm_device *tdev = pipe_to_tinydrm(pipe);
struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
u8 addr_mode;
int ret;
DRM_DEBUG_KMS("\n");
ret = mipi_dbi_poweron_conditional_reset(mipi);
if (ret < 0)
return;
if (ret == 1)
goto out_enable;
mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_OFF);
mipi_dbi_command(mipi, MIPI_DCS_SOFT_RESET);
msleep(150);
mipi_dbi_command(mipi, MIPI_DCS_EXIT_SLEEP_MODE);
msleep(10);
mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, 0x55); // 16 bit color
msleep(10);
mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, 0);
mipi_dbi_command(mipi, MIPI_DCS_SET_COLUMN_ADDRESS, 0, 0, 0, 240);
mipi_dbi_command(mipi, MIPI_DCS_SET_PAGE_ADDRESS, 0, 0, 320>>8, 320&0xFF);
mipi_dbi_command(mipi, MIPI_DCS_ENTER_INVERT_MODE); // odd hack, displays are inverted
mipi_dbi_command(mipi, MIPI_DCS_ENTER_NORMAL_MODE);
msleep(10);
mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON);
msleep(10);
out_enable:
/* The PiTFT (ili9340) has a hardware reset circuit that
* resets only on power-on and not on each reboot through
* a gpio like the rpi-display does.
* As a result, we need to always apply the rotation value
* regardless of the display "on/off" state.
*/
switch (mipi->rotation) {
default:
addr_mode = 0;
x_offset = col_offset;
y_offset = row_offset;
break;
case 90:
addr_mode = ST77XX_MADCTL_MV | ST77XX_MADCTL_MX;
x_offset = row_offset;
y_offset = col_offset;
break;
case 180:
addr_mode = ST77XX_MADCTL_MX | ST77XX_MADCTL_MY;
x_offset = col_offset+col_hack_fix_offset;
// hack tweak to account for extra pixel width to make even
y_offset = row_offset;
break;
case 270:
addr_mode = ST77XX_MADCTL_MV | ST77XX_MADCTL_MY;
x_offset = row_offset;
y_offset = col_offset;
break;
}
mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
mipi_dbi_command(mipi, MIPI_DCS_SET_DISPLAY_ON);
mipi_dbi_enable_flush(mipi, crtc_state, plane_state);
backlight_enable(mipi->backlight);
}
static const struct drm_simple_display_pipe_funcs st7789vada_pipe_funcs = {
.enable = st7789vada_enable,
.disable = mipi_dbi_pipe_disable,
.update = tinydrm_display_pipe_update,
.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
};
static struct drm_display_mode st7789vada_mode = {
TINYDRM_MODE(240, 320, 25, 15), // width, height, mm_w, mm_h
};
DEFINE_DRM_GEM_CMA_FOPS(st7789vada_fops);
static struct drm_driver st7789vada_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
DRIVER_ATOMIC,
.fops = &st7789vada_fops,
TINYDRM_GEM_DRIVER_OPS,
.debugfs_init = mipi_dbi_debugfs_init,
.name = "st7789vada",
.desc = "ST7789V Adafruit",
.date = "20190914",
.major = 1,
.minor = 0,
};
static const struct of_device_id st7789vada_of_match[] = {
{ .compatible = "multi-inno,mi0283qt" },
{},
};
MODULE_DEVICE_TABLE(of, st7789vada_of_match);
static const struct spi_device_id st7789vada_id[] = {
{ "st7789vada", 0 },
{ },
};
MODULE_DEVICE_TABLE(spi, st7789vada_id);
static const struct drm_framebuffer_funcs st7789vada_fb_funcs = {
.destroy = drm_gem_fb_destroy,
.create_handle = drm_gem_fb_create_handle,
.dirty = tinydrm_fb_dirty,
};
static const uint32_t st7789vada_formats[] = {
DRM_FORMAT_RGB565,
DRM_FORMAT_XRGB8888,
};
static int st7789vada_fb_dirty(struct drm_framebuffer *fb,
struct drm_file *file_priv,
unsigned int flags, unsigned int color,
struct drm_clip_rect *clips,
unsigned int num_clips)
{
struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
struct tinydrm_device *tdev = fb->dev->dev_private;
struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
bool swap = mipi->swap_bytes;
struct drm_clip_rect clip;
int ret = 0;
bool full;
void *tr;
u16 x1, x2, y1, y2;
if (!mipi->enabled)
return 0;
full = tinydrm_merge_clips(&clip, clips, num_clips, flags,
fb->width, fb->height);
DRM_DEBUG("Flushing [FB:%d] x1=%u, x2=%u, y1=%u, y2=%u\n", fb->base.id,
clip.x1, clip.x2, clip.y1, clip.y2);
if (!mipi->dc || !full || swap ||
fb->format->format == DRM_FORMAT_XRGB8888) {
tr = mipi->tx_buf;
ret = mipi_dbi_buf_copy(mipi->tx_buf, fb, &clip, swap);
if (ret)
return ret;
} else {
tr = cma_obj->vaddr;
}
x1 = clip.x1 + x_offset;
x2 = clip.x2 - 1 + x_offset;
y1 = clip.y1 + y_offset;
y2 = clip.y2 - 1 + y_offset;
//printk(KERN_INFO "setaddrwin %d %d %d %d\n", x1, y1, x2, y2);
mipi_dbi_command(mipi, MIPI_DCS_SET_COLUMN_ADDRESS,
(x1 >> 8) & 0xFF, x1 & 0xFF,
(x2 >> 8) & 0xFF, x2 & 0xFF);
mipi_dbi_command(mipi, MIPI_DCS_SET_PAGE_ADDRESS,
(y1 >> 8) & 0xFF, y1 & 0xFF,
(y2 >> 8) & 0xFF, y2 & 0xFF);
ret = mipi_dbi_command_buf(mipi, MIPI_DCS_WRITE_MEMORY_START, tr,
(clip.x2 - clip.x1) * (clip.y2 - clip.y1) * 2);
return ret;
}
/**
* st7789vada - MIPI DBI initialization
* @dev: Parent device
* @mipi: &mipi_dbi structure to initialize
* @pipe_funcs: Display pipe functions
* @driver: DRM driver
* @mode: Display mode
* @rotation: Initial rotation in degrees Counter Clock Wise
*
* This function initializes a &mipi_dbi structure and it's underlying
* @tinydrm_device. It also sets up the display pipeline.
*
* Supported formats: Native RGB565 and emulated XRGB8888.
*
* Objects created by this function will be automatically freed on driver
* detach (devres).
*
* Returns:
* Zero on success, negative error code on failure.
*/
int st7789vada_init(struct device *dev, struct mipi_dbi *mipi,
const struct drm_simple_display_pipe_funcs *pipe_funcs,
struct drm_driver *driver,
const struct drm_display_mode *mode, unsigned int rotation)
{
size_t bufsize = mode->vdisplay * mode->hdisplay * sizeof(u16);
struct tinydrm_device *tdev = &mipi->tinydrm;
int ret;
if (!mipi->command)
return -EINVAL;
mutex_init(&mipi->cmdlock);
mipi->tx_buf = devm_kmalloc(dev, bufsize, GFP_KERNEL);
if (!mipi->tx_buf)
return -ENOMEM;
ret = devm_tinydrm_init(dev, tdev, &st7789vada_fb_funcs, driver);
if (ret)
return ret;
tdev->fb_dirty = st7789vada_fb_dirty;
/* TODO: Maybe add DRM_MODE_CONNECTOR_SPI */
ret = tinydrm_display_pipe_init(tdev, pipe_funcs,
DRM_MODE_CONNECTOR_VIRTUAL,
st7789vada_formats,
ARRAY_SIZE(st7789vada_formats), mode,
rotation);
if (ret)
return ret;
tdev->drm->mode_config.preferred_depth = 16;
mipi->rotation = rotation;
drm_mode_config_reset(tdev->drm);
DRM_DEBUG_KMS("preferred_depth=%u, rotation = %u\n",
tdev->drm->mode_config.preferred_depth, rotation);
return 0;
}
static int st7789vada_probe(struct spi_device *spi)
{
struct device *dev = &spi->dev;
struct mipi_dbi *mipi;
struct gpio_desc *dc;
u32 rotation = 0;
u32 width = 240;
u32 height = 320;
int ret;
mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL);
if (!mipi)
return -ENOMEM;
mipi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(mipi->reset)) {
DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
return PTR_ERR(mipi->reset);
}
dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
if (IS_ERR(dc)) {
DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n");
return PTR_ERR(dc);
}
mipi->regulator = devm_regulator_get(dev, "power");
if (IS_ERR(mipi->regulator))
return PTR_ERR(mipi->regulator);
mipi->backlight = devm_of_find_backlight(dev);
if (IS_ERR(mipi->backlight))
return PTR_ERR(mipi->backlight);
device_property_read_u32(dev, "rotation", &rotation);
//printk(KERN_INFO "Rotation %d\n", rotation);
device_property_read_u32(dev, "width", &width);
if (width % 2) {
width +=1; // odd width will cause a kernel panic
col_hack_fix_offset = 1;
} else {
col_hack_fix_offset = 0;
}
//printk(KERN_INFO "Width %d\n", width);
if ((width == 0) || (width > 240)) {
width = 240; // default to full framebuff;
}
device_property_read_u32(dev, "height", &height);
//printk(KERN_INFO "Height %d\n", height);
if ((height == 0) || (height > 320)) {
height = 320; // default to full framebuff;
}
st7789vada_mode.hdisplay = st7789vada_mode.hsync_start =
st7789vada_mode.hsync_end = st7789vada_mode.htotal = width;
st7789vada_mode.vdisplay = st7789vada_mode.vsync_start =
st7789vada_mode.vsync_end = st7789vada_mode.vtotal = height;
device_property_read_u32(dev, "col_offset", &col_offset);
//printk(KERN_INFO "Column offset %d\n", col_offset);
device_property_read_u32(dev, "row_offset", &row_offset);
//printk(KERN_INFO "Row offset %d\n", row_offset);
ret = mipi_dbi_spi_init(spi, mipi, dc);
if (ret)
return ret;
/* Cannot read from this controller via SPI */
mipi->read_commands = NULL;
ret = st7789vada_init(&spi->dev, mipi, &st7789vada_pipe_funcs,
&st7789vada_driver, &st7789vada_mode, rotation);
if (ret)
return ret;
spi_set_drvdata(spi, mipi);
return devm_tinydrm_register(&mipi->tinydrm);
}
static void st7789vada_shutdown(struct spi_device *spi)
{
struct mipi_dbi *mipi = spi_get_drvdata(spi);
tinydrm_shutdown(&mipi->tinydrm);
}
static int __maybe_unused st7789vada_pm_suspend(struct device *dev)
{
struct mipi_dbi *mipi = dev_get_drvdata(dev);
return drm_mode_config_helper_suspend(mipi->tinydrm.drm);
}
static int __maybe_unused st7789vada_pm_resume(struct device *dev)
{
struct mipi_dbi *mipi = dev_get_drvdata(dev);
drm_mode_config_helper_resume(mipi->tinydrm.drm);
return 0;
}
static const struct dev_pm_ops st7789vada_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(st7789vada_pm_suspend, st7789vada_pm_resume)
};
static struct spi_driver st7789vada_spi_driver = {
.driver = {
.name = "st7789vada",
.owner = THIS_MODULE,
.of_match_table = st7789vada_of_match,
.pm = &st7789vada_pm_ops,
},
.id_table = st7789vada_id,
.probe = st7789vada_probe,
.shutdown = st7789vada_shutdown,
};
module_spi_driver(st7789vada_spi_driver);
MODULE_DESCRIPTION("Sitronix ST7789V Flexible DRM driver");
MODULE_AUTHOR("Limor Fried");
MODULE_LICENSE("GPL");