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zephyr/drivers/display/display_ili9xxx.c
Daniel Leung 8b8e8f99ba display: introduce CONFIG_DISPLAY_INIT_PRIORITY 
This introduces a new kconfig CONFIG_DISPLAY_INIT_PRIORITY
to specify the initialization priority for display devices.
Most of the display devices are using APPLICATION and
CONFIG_APPLICATION_INIT_PRIORITY which is not entirely
appropriate for devices. Due to linking order, the display
device may be initialized after application code at same
init level and priority. This results in the display device
not ready to be used for application code. So this kconfig
option allows the display devices to be initialized earlier
if needed.

For the drivers using CONFIG_APPLICATION_INIT_PRIORITY,
they have been changed to use CONFIG_DISPLAY_INIT_PRIORITY
instead.

Note that the default value for CONFIG_DISPLAY_INIT_PRIORITY
is the same as CONFIG_APPLICATION_INIT_PRIORITY at 90 to
avoid any functional changes.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
2021-08-12 17:00:39 +02:00

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/*
* Copyright (c) 2017 Jan Van Winkel <jan.van_winkel@dxplore.eu>
* Copyright (c) 2019 Nordic Semiconductor ASA
* Copyright (c) 2020 Teslabs Engineering S.L.
* Copyright (c) 2021 Krivorot Oleg <krivorot.oleg@gmail.com>
* SPDX-License-Identifier: Apache-2.0
*/
#include "display_ili9xxx.h"
#include <dt-bindings/display/ili9xxx.h>
#include <drivers/display.h>
#include <sys/byteorder.h>
#include <logging/log.h>
LOG_MODULE_REGISTER(display_ili9xxx, CONFIG_DISPLAY_LOG_LEVEL);
struct ili9xxx_data {
uint8_t bytes_per_pixel;
enum display_pixel_format pixel_format;
enum display_orientation orientation;
};
int ili9xxx_transmit(const struct device *dev, uint8_t cmd, const void *tx_data,
size_t tx_len)
{
const struct ili9xxx_config *config = dev->config;
int r;
struct spi_buf tx_buf;
struct spi_buf_set tx_bufs = { .buffers = &tx_buf, .count = 1U };
/* send command */
tx_buf.buf = &cmd;
tx_buf.len = 1U;
gpio_pin_set_dt(&config->cmd_data, ILI9XXX_CMD);
r = spi_write_dt(&config->spi, &tx_bufs);
if (r < 0) {
return r;
}
/* send data (if any) */
if (tx_data != NULL) {
tx_buf.buf = (void *)tx_data;
tx_buf.len = tx_len;
gpio_pin_set_dt(&config->cmd_data, ILI9XXX_DATA);
r = spi_write_dt(&config->spi, &tx_bufs);
if (r < 0) {
return r;
}
}
return 0;
}
static int ili9xxx_exit_sleep(const struct device *dev)
{
int r;
r = ili9xxx_transmit(dev, ILI9XXX_SLPOUT, NULL, 0);
if (r < 0) {
return r;
}
k_sleep(K_MSEC(ILI9XXX_SLEEP_OUT_TIME));
return 0;
}
static void ili9xxx_hw_reset(const struct device *dev)
{
const struct ili9xxx_config *config = dev->config;
if (config->reset.port == NULL) {
return;
}
gpio_pin_set_dt(&config->reset, 1);
k_sleep(K_MSEC(ILI9XXX_RESET_PULSE_TIME));
gpio_pin_set_dt(&config->reset, 0);
k_sleep(K_MSEC(ILI9XXX_RESET_WAIT_TIME));
}
static int ili9xxx_set_mem_area(const struct device *dev, const uint16_t x,
const uint16_t y, const uint16_t w,
const uint16_t h)
{
int r;
uint16_t spi_data[2];
spi_data[0] = sys_cpu_to_be16(x);
spi_data[1] = sys_cpu_to_be16(x + w - 1U);
r = ili9xxx_transmit(dev, ILI9XXX_CASET, &spi_data[0], 4U);
if (r < 0) {
return r;
}
spi_data[0] = sys_cpu_to_be16(y);
spi_data[1] = sys_cpu_to_be16(y + h - 1U);
r = ili9xxx_transmit(dev, ILI9XXX_PASET, &spi_data[0], 4U);
if (r < 0) {
return r;
}
return 0;
}
static int ili9xxx_write(const struct device *dev, const uint16_t x,
const uint16_t y,
const struct display_buffer_descriptor *desc,
const void *buf)
{
const struct ili9xxx_config *config = dev->config;
struct ili9xxx_data *data = dev->data;
int r;
const uint8_t *write_data_start = (const uint8_t *)buf;
struct spi_buf tx_buf;
struct spi_buf_set tx_bufs;
uint16_t write_cnt;
uint16_t nbr_of_writes;
uint16_t write_h;
__ASSERT(desc->width <= desc->pitch, "Pitch is smaller than width");
__ASSERT((desc->pitch * data->bytes_per_pixel * desc->height) <=
desc->buf_size,
"Input buffer to small");
LOG_DBG("Writing %dx%d (w,h) @ %dx%d (x,y)", desc->width, desc->height,
x, y);
r = ili9xxx_set_mem_area(dev, x, y, desc->width, desc->height);
if (r < 0) {
return r;
}
if (desc->pitch > desc->width) {
write_h = 1U;
nbr_of_writes = desc->height;
} else {
write_h = desc->height;
nbr_of_writes = 1U;
}
r = ili9xxx_transmit(dev, ILI9XXX_RAMWR, write_data_start,
desc->width * data->bytes_per_pixel * write_h);
if (r < 0) {
return r;
}
tx_bufs.buffers = &tx_buf;
tx_bufs.count = 1;
write_data_start += desc->pitch * data->bytes_per_pixel;
for (write_cnt = 1U; write_cnt < nbr_of_writes; ++write_cnt) {
tx_buf.buf = (void *)write_data_start;
tx_buf.len = desc->width * data->bytes_per_pixel * write_h;
r = spi_write_dt(&config->spi, &tx_bufs);
if (r < 0) {
return r;
}
write_data_start += desc->pitch * data->bytes_per_pixel;
}
return 0;
}
static int ili9xxx_read(const struct device *dev, const uint16_t x,
const uint16_t y,
const struct display_buffer_descriptor *desc, void *buf)
{
LOG_ERR("Reading not supported");
return -ENOTSUP;
}
static void *ili9xxx_get_framebuffer(const struct device *dev)
{
LOG_ERR("Direct framebuffer access not supported");
return NULL;
}
static int ili9xxx_display_blanking_off(const struct device *dev)
{
LOG_DBG("Turning display blanking off");
return ili9xxx_transmit(dev, ILI9XXX_DISPON, NULL, 0);
}
static int ili9xxx_display_blanking_on(const struct device *dev)
{
LOG_DBG("Turning display blanking on");
return ili9xxx_transmit(dev, ILI9XXX_DISPOFF, NULL, 0);
}
static int ili9xxx_set_brightness(const struct device *dev,
const uint8_t brightness)
{
LOG_ERR("Set brightness not implemented");
return -ENOTSUP;
}
static int ili9xxx_set_contrast(const struct device *dev,
const uint8_t contrast)
{
LOG_ERR("Set contrast not supported");
return -ENOTSUP;
}
static int
ili9xxx_set_pixel_format(const struct device *dev,
const enum display_pixel_format pixel_format)
{
struct ili9xxx_data *data = dev->data;
int r;
uint8_t tx_data;
uint8_t bytes_per_pixel;
if (pixel_format == PIXEL_FORMAT_RGB_565) {
bytes_per_pixel = 2U;
tx_data = ILI9XXX_PIXSET_MCU_16_BIT | ILI9XXX_PIXSET_RGB_16_BIT;
} else if (pixel_format == PIXEL_FORMAT_RGB_888) {
bytes_per_pixel = 3U;
tx_data = ILI9XXX_PIXSET_MCU_18_BIT | ILI9XXX_PIXSET_RGB_18_BIT;
} else {
LOG_ERR("Unsupported pixel format");
return -ENOTSUP;
}
r = ili9xxx_transmit(dev, ILI9XXX_PIXSET, &tx_data, 1U);
if (r < 0) {
return r;
}
data->pixel_format = pixel_format;
data->bytes_per_pixel = bytes_per_pixel;
return 0;
}
static int ili9xxx_set_orientation(const struct device *dev,
const enum display_orientation orientation)
{
struct ili9xxx_data *data = dev->data;
int r;
uint8_t tx_data = ILI9XXX_MADCTL_BGR;
if (orientation == DISPLAY_ORIENTATION_NORMAL) {
tx_data |= ILI9XXX_MADCTL_MX;
} else if (orientation == DISPLAY_ORIENTATION_ROTATED_90) {
tx_data |= ILI9XXX_MADCTL_MV;
} else if (orientation == DISPLAY_ORIENTATION_ROTATED_180) {
tx_data |= ILI9XXX_MADCTL_MY;
} else if (orientation == DISPLAY_ORIENTATION_ROTATED_270) {
tx_data |= ILI9XXX_MADCTL_MV | ILI9XXX_MADCTL_MX |
ILI9XXX_MADCTL_MY;
}
r = ili9xxx_transmit(dev, ILI9XXX_MADCTL, &tx_data, 1U);
if (r < 0) {
return r;
}
data->orientation = orientation;
return 0;
}
static void ili9xxx_get_capabilities(const struct device *dev,
struct display_capabilities *capabilities)
{
struct ili9xxx_data *data = dev->data;
const struct ili9xxx_config *config = dev->config;
memset(capabilities, 0, sizeof(struct display_capabilities));
capabilities->supported_pixel_formats =
PIXEL_FORMAT_RGB_565 | PIXEL_FORMAT_RGB_888;
capabilities->current_pixel_format = data->pixel_format;
if (data->orientation == DISPLAY_ORIENTATION_NORMAL ||
data->orientation == DISPLAY_ORIENTATION_ROTATED_180) {
capabilities->x_resolution = config->x_resolution;
capabilities->y_resolution = config->y_resolution;
} else {
capabilities->x_resolution = config->y_resolution;
capabilities->y_resolution = config->x_resolution;
}
capabilities->current_orientation = data->orientation;
}
static int ili9xxx_configure(const struct device *dev)
{
const struct ili9xxx_config *config = dev->config;
int r;
enum display_pixel_format pixel_format;
enum display_orientation orientation;
/* pixel format */
if (config->pixel_format == ILI9XXX_PIXEL_FORMAT_RGB565) {
pixel_format = PIXEL_FORMAT_RGB_565;
} else {
pixel_format = PIXEL_FORMAT_RGB_888;
}
r = ili9xxx_set_pixel_format(dev, pixel_format);
if (r < 0) {
return r;
}
/* orientation */
if (config->rotation == 0U) {
orientation = DISPLAY_ORIENTATION_NORMAL;
} else if (config->rotation == 90U) {
orientation = DISPLAY_ORIENTATION_ROTATED_90;
} else if (config->rotation == 180U) {
orientation = DISPLAY_ORIENTATION_ROTATED_180;
} else {
orientation = DISPLAY_ORIENTATION_ROTATED_270;
}
r = ili9xxx_set_orientation(dev, orientation);
if (r < 0) {
return r;
}
if (config->inversion) {
r = ili9xxx_transmit(dev, ILI9XXX_DINVON, NULL, 0U);
if (r < 0) {
return r;
}
}
r = config->regs_init_fn(dev);
if (r < 0) {
return r;
}
return 0;
}
static int ili9xxx_init(const struct device *dev)
{
const struct ili9xxx_config *config = dev->config;
int r;
if (!spi_is_ready(&config->spi)) {
LOG_ERR("SPI device is not ready");
return -ENODEV;
}
if (!device_is_ready(config->cmd_data.port)) {
LOG_ERR("Command/Data GPIO device not ready");
return -ENODEV;
}
r = gpio_pin_configure_dt(&config->cmd_data, GPIO_OUTPUT);
if (r < 0) {
LOG_ERR("Could not configure command/data GPIO (%d)", r);
return r;
}
if (config->reset.port != NULL) {
if (!device_is_ready(config->reset.port)) {
LOG_ERR("Reset GPIO device not ready");
return -ENODEV;
}
r = gpio_pin_configure_dt(&config->reset, GPIO_OUTPUT_INACTIVE);
if (r < 0) {
LOG_ERR("Could not configure reset GPIO (%d)", r);
return r;
}
}
ili9xxx_hw_reset(dev);
r = ili9xxx_transmit(dev, ILI9XXX_SWRESET, NULL, 0);
if (r < 0) {
LOG_ERR("Error transmit command Software Reset (%d)", r);
return r;
}
k_sleep(K_MSEC(ILI9XXX_RESET_WAIT_TIME));
ili9xxx_display_blanking_on(dev);
r = ili9xxx_configure(dev);
if (r < 0) {
LOG_ERR("Could not configure display (%d)", r);
return r;
}
r = ili9xxx_exit_sleep(dev);
if (r < 0) {
LOG_ERR("Could not exit sleep mode (%d)", r);
return r;
}
return 0;
}
static const struct display_driver_api ili9xxx_api = {
.blanking_on = ili9xxx_display_blanking_on,
.blanking_off = ili9xxx_display_blanking_off,
.write = ili9xxx_write,
.read = ili9xxx_read,
.get_framebuffer = ili9xxx_get_framebuffer,
.set_brightness = ili9xxx_set_brightness,
.set_contrast = ili9xxx_set_contrast,
.get_capabilities = ili9xxx_get_capabilities,
.set_pixel_format = ili9xxx_set_pixel_format,
.set_orientation = ili9xxx_set_orientation,
};
#define INST_DT_ILI9XXX(n, t) DT_INST(n, ilitek_ili##t)
#define ILI9XXX_INIT(n, t) \
ILI##t##_REGS_INIT(n); \
\
static const struct ili9xxx_config ili9xxx_config_##n = { \
.spi = SPI_DT_SPEC_GET(INST_DT_ILI9XXX(n, t), \
SPI_OP_MODE_MASTER | SPI_WORD_SET(8), \
0), \
.cmd_data = GPIO_DT_SPEC_GET(INST_DT_ILI9XXX(n, t), \
cmd_data_gpios), \
.reset = GPIO_DT_SPEC_GET_OR(INST_DT_ILI9XXX(n, t), \
reset_gpios, {0}), \
.pixel_format = DT_PROP(INST_DT_ILI9XXX(n, t), pixel_format), \
.rotation = DT_PROP(INST_DT_ILI9XXX(n, t), rotation), \
.x_resolution = ILI##t##_X_RES, \
.y_resolution = ILI##t##_Y_RES, \
.inversion = DT_PROP(INST_DT_ILI9XXX(n, t), display_inversion),\
.regs = &ili9xxx_regs_##n, \
.regs_init_fn = ili##t##_regs_init, \
}; \
\
static struct ili9xxx_data ili9xxx_data_##n; \
\
DEVICE_DT_DEFINE(INST_DT_ILI9XXX(n, t), ili9xxx_init, \
NULL, &ili9xxx_data_##n, \
&ili9xxx_config_##n, POST_KERNEL, \
CONFIG_DISPLAY_INIT_PRIORITY, &ili9xxx_api);
#define DT_INST_FOREACH_ILI9XXX_STATUS_OKAY(t) \
UTIL_LISTIFY(DT_NUM_INST_STATUS_OKAY(ilitek_ili##t), ILI9XXX_INIT, t)
#ifdef CONFIG_ILI9340
#include "display_ili9340.h"
DT_INST_FOREACH_ILI9XXX_STATUS_OKAY(9340);
#endif
#ifdef CONFIG_ILI9341
#include "display_ili9341.h"
DT_INST_FOREACH_ILI9XXX_STATUS_OKAY(9341);
#endif
#ifdef CONFIG_ILI9488
#include "display_ili9488.h"
DT_INST_FOREACH_ILI9XXX_STATUS_OKAY(9488);
#endif
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