zara
/
zephyr
mirror of https://github.com/zephyrproject-rtos/zephyr
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118623 Commits
82 Branches
204 Tags
1.7 GiB
 
 
 
 
 
 
Tree: 697d0f845d
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '697d0f845d'
${ noResults }
zephyr/drivers/display/display_nt35510.c

439 lines
14 KiB
Raw Blame History

/*
* Copyright (c) 2024 Erik Andersson <erian747@gmail.com>
*
* SPDX-License-Identifier: Apache-2.0
*
* Based on the NT35510 driver provided by STMicroelectronics at
* https://github.com/STMicroelectronics/stm32-nt35510/blob/main/nt35510.c
*/
#define DT_DRV_COMPAT frida_nt35510
#include <errno.h>
#include <string.h>
#include <zephyr/kernel.h>
#include <zephyr/drivers/display.h>
#include <zephyr/drivers/mipi_dsi.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/logging/log.h>
#include "display_nt35510.h"
LOG_MODULE_REGISTER(nt35510, CONFIG_DISPLAY_LOG_LEVEL);
/**
* @brief Possible values of COLMOD parameter corresponding to used pixel formats
*/
#define NT35510_COLMOD_RGB565 0x55
#define NT35510_COLMOD_RGB888 0x77
/**
* @brief NT35510_480X800 Timing parameters for Portrait orientation mode
*/
#define NT35510_480X800_HSYNC ((uint16_t)2) /* Horizontal synchronization */
#define NT35510_480X800_HBP ((uint16_t)34) /* Horizontal back porch */
#define NT35510_480X800_HFP ((uint16_t)34) /* Horizontal front porch */
#define NT35510_480X800_VSYNC ((uint16_t)120) /* Vertical synchronization */
#define NT35510_480X800_VBP ((uint16_t)150) /* Vertical back porch */
#define NT35510_480X800_VFP ((uint16_t)150) /* Vertical front porch */
/**
* @brief NT35510_800X480 Timing parameters for Landscape orientation mode
* Same values as for Portrait mode in fact.
*/
#define NT35510_800X480_HSYNC NT35510_480X800_VSYNC /* Horizontal synchronization */
#define NT35510_800X480_HBP NT35510_480X800_VBP /* Horizontal back porch */
#define NT35510_800X480_HFP NT35510_480X800_VFP /* Horizontal front porch */
#define NT35510_800X480_VSYNC NT35510_480X800_HSYNC /* Vertical synchronization */
#define NT35510_800X480_VBP NT35510_480X800_HBP /* Vertical back porch */
#define NT35510_800X480_VFP NT35510_480X800_HFP /* Vertical front porch */
struct nt35510_config {
const struct device *mipi_dsi;
const struct gpio_dt_spec reset;
const struct gpio_dt_spec backlight;
uint8_t data_lanes;
uint16_t width;
uint16_t height;
uint8_t channel;
uint16_t rotation;
};
struct nt35510_data {
enum display_pixel_format pixel_format;
enum display_orientation orientation;
uint16_t xres;
uint16_t yres;
};
struct nt35510_init_cmd {
uint8_t reg;
uint8_t cmd_len;
uint8_t cmd[5];
} __packed;
static const struct nt35510_init_cmd init_cmds[] = {
/* LV2: Page 1 enable */
{.reg = 0xf0, .cmd_len = 5, .cmd = {0x55, 0xaa, 0x52, 0x08, 0x01}},
/* AVDD: 5.2V */
{.reg = 0xb0, .cmd_len = 3, .cmd = {0x03, 0x03, 0x03}},
/* AVDD: Ratio */
{.reg = 0xb6, .cmd_len = 3, .cmd = {0x46, 0x46, 0x46}},
/* AVEE: -5.2V */
{.reg = 0xb1, .cmd_len = 3, .cmd = {0x03, 0x03, 0x03}},
/* AVEE: Ratio */
{.reg = 0xb7, .cmd_len = 3, .cmd = {0x36, 0x36, 0x36}},
/* VCL: -2.5V */
{.reg = 0xb2, .cmd_len = 3, .cmd = {0x00, 0x00, 0x02}},
/* VCL: Ratio */
{.reg = 0xb8, .cmd_len = 3, .cmd = {0x26, 0x26, 0x26}},
/* VGH: 15V (Free Pump) */
{.reg = 0xbf, .cmd_len = 1, .cmd = {0x01}},
/* Frida LCD MFR specific */
{.reg = 0xb3, .cmd_len = 3, .cmd = {0x09, 0x09, 0x09}},
/* VGH: Ratio */
{.reg = 0xb9, .cmd_len = 3, .cmd = {0x36, 0x36, 0x36}},
/* VGL_REG: -10V */
{.reg = 0xb5, .cmd_len = 3, .cmd = {0x08, 0x08, 0x08}},
/* VGLX: Ratio */
{.reg = 0xba, .cmd_len = 3, .cmd = {0x26, 0x26, 0x26}},
/* VGMP/VGSP: 4.5V/0V */
{.reg = 0xbc, .cmd_len = 3, .cmd = {0x00, 0x80, 0x00}},
/* VGMN/VGSN:-4.5V/0V */
{.reg = 0xbd, .cmd_len = 3, .cmd = {0x00, 0x80, 0x00}},
/* VCOM: -1.325V */
{.reg = 0xbe, .cmd_len = 2, .cmd = {0x00, 0x50}},
/* LV2: Page 0 enable */
{.reg = 0xf0, .cmd_len = 5, .cmd = {0x55, 0xaa, 0x52, 0x08, 0x00}},
/* Display optional control */
{.reg = 0xb1, .cmd_len = 2, .cmd = {0xfc, 0x00}},
/* Set source output data hold time */
{.reg = 0xb6, .cmd_len = 1, .cmd = {0x03}},
/* Display resolution control */
{.reg = 0xb5, .cmd_len = 1, .cmd = {0x51}},
/* Gate EQ control */
{.reg = 0xb7, .cmd_len = 2, .cmd = {0x00, 0x00}},
/* Src EQ control(Mode2) */
{.reg = 0xb8, .cmd_len = 4, .cmd = {0x01, 0x02, 0x02, 0x02}},
/* Frida LCD MFR specific */
{.reg = 0xbc, .cmd_len = 3, .cmd = {0x00, 0x00, 0x00}},
/* Frida LCD MFR specific */
{.reg = 0xcc, .cmd_len = 3, .cmd = {0x03, 0x00, 0x00}},
/* Frida LCD MFR specific */
{.reg = 0xba, .cmd_len = 1, .cmd = {0x01}}};
static const struct nt35510_init_cmd portrait_cmds[] = {
{.reg = NT35510_CMD_MADCTL, .cmd_len = 1, .cmd = {0x00}},
{.reg = NT35510_CMD_CASET, .cmd_len = 4, .cmd = {0x00, 0x00, 0x01, 0xdf}},
{.reg = NT35510_CMD_RASET, .cmd_len = 4, .cmd = {0x00, 0x00, 0x03, 0x1f}}};
static const struct nt35510_init_cmd landscape_cmds[] = {
{.reg = NT35510_CMD_MADCTL, .cmd_len = 1, .cmd = {0x60}},
{.reg = NT35510_CMD_CASET, .cmd_len = 4, .cmd = {0x00, 0x00, 0x03, 0x1f}},
{.reg = NT35510_CMD_RASET, .cmd_len = 4, .cmd = {0x00, 0x00, 0x01, 0xdf}}};
static const struct nt35510_init_cmd turn_on_cmds[] = {
/* Content Adaptive Backlight Control section start */
{.reg = NT35510_CMD_WRDISBV, .cmd_len = 1, .cmd = {0x7f}},
/* Brightness Control Block, Display Dimming & BackLight on */
{.reg = NT35510_CMD_WRCTRLD, .cmd_len = 1, .cmd = {0x2c}},
/* Image Content based Adaptive Brightness [Still Picture] */
{.reg = NT35510_CMD_WRCABC, .cmd_len = 1, .cmd = {0x02}},
/* Brightness, use maximum as default */
{.reg = NT35510_CMD_WRCABCMB, .cmd_len = 1, .cmd = {0xff}},
/* Turn on display */
{.reg = MIPI_DCS_SET_DISPLAY_ON, .cmd_len = 0, .cmd = {}},
/* Send Command GRAM memory write (no parameters)
* this initiates frame write via other DSI commands sent by
* DSI host from LTDC incoming pixels in video mode
*/
{.reg = NT35510_CMD_RAMWR, .cmd_len = 0, .cmd = {}},
};
/* Write data buffer to LCD register */
static int nt35510_write_reg(const struct device *dev, uint8_t reg, const uint8_t *buf, size_t len)
{
int ret;
const struct nt35510_config *cfg = dev->config;
ret = mipi_dsi_dcs_write(cfg->mipi_dsi, cfg->channel, reg, buf, len);
if (ret < 0) {
LOG_ERR("Failed writing reg: 0x%x result: (%d)", reg, ret);
return ret;
}
return 0;
}
/* Write an 8-bit value to a register */
static int nt35510_write_reg_val(const struct device *dev, uint8_t reg, uint8_t value)
{
return nt35510_write_reg(dev, reg, &value, 1);
}
/* Write a list of commands to registers */
static int nt35510_write_sequence(const struct device *dev, const struct nt35510_init_cmd *cmd,
uint8_t nr_cmds)
{
int ret = 0;
/* Loop trough all commands as long as writes are successful*/
for (int i = 0; i < nr_cmds && ret == 0; i++) {
ret = nt35510_write_reg(dev, cmd->reg, cmd->cmd, cmd->cmd_len);
cmd++;
}
return ret;
}
/* Initialization, configuration turn on sequence */
static int nt35510_config(const struct device *dev)
{
struct nt35510_data *data = dev->data;
int ret;
ret = nt35510_write_sequence(dev, init_cmds, ARRAY_SIZE(init_cmds));
if (ret < 0) {
return ret;
}
/* Add a delay, otherwise MADCTL not taken */
k_msleep(200);
/* Configure orientation */
if (data->orientation == DISPLAY_ORIENTATION_NORMAL) {
ret = nt35510_write_sequence(dev, portrait_cmds, ARRAY_SIZE(portrait_cmds));
} else {
ret = nt35510_write_sequence(dev, landscape_cmds, ARRAY_SIZE(landscape_cmds));
}
if (ret < 0) {
return ret;
}
/* Exit sleep mode */
ret = nt35510_write_reg(dev, NT35510_CMD_SLPOUT, NULL, 0);
if (ret < 0) {
return ret;
}
/* Wait for sleep out exit */
k_msleep(20);
/* Set color mode */
ret = nt35510_write_reg_val(dev, NT35510_CMD_COLMOD,
data->pixel_format == PIXEL_FORMAT_RGB_565
? NT35510_COLMOD_RGB565
: NT35510_COLMOD_RGB888);
if (ret < 0) {
return ret;
}
/* Adjust brightness and turn on display */
ret = nt35510_write_sequence(dev, turn_on_cmds, ARRAY_SIZE(turn_on_cmds));
return ret;
}
static int nt35510_blanking_on(const struct device *dev)
{
const struct nt35510_config *cfg = dev->config;
int ret;
if (cfg->backlight.port != NULL) {
ret = gpio_pin_set_dt(&cfg->backlight, 0);
if (ret) {
LOG_ERR("Disable backlight failed! (%d)", ret);
return ret;
}
}
return nt35510_write_reg(dev, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);
}
static int nt35510_blanking_off(const struct device *dev)
{
const struct nt35510_config *cfg = dev->config;
int ret;
if (cfg->backlight.port != NULL) {
ret = gpio_pin_set_dt(&cfg->backlight, 1);
if (ret) {
LOG_ERR("Enable backlight failed! (%d)", ret);
return ret;
}
}
return nt35510_write_reg(dev, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
}
static int nt35510_set_brightness(const struct device *dev, const uint8_t brightness)
{
return nt35510_write_reg(dev, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, &brightness, 1);
}
static void nt35510_get_capabilities(const struct device *dev,
struct display_capabilities *capabilities)
{
const struct nt35510_config *cfg = dev->config;
struct nt35510_data *data = dev->data;
memset(capabilities, 0, sizeof(struct display_capabilities));
capabilities->x_resolution = cfg->width;
capabilities->y_resolution = cfg->height;
capabilities->supported_pixel_formats = PIXEL_FORMAT_RGB_565 | PIXEL_FORMAT_RGB_888;
capabilities->current_pixel_format = data->pixel_format;
capabilities->current_orientation = data->orientation;
}
static int nt35510_set_pixel_format(const struct device *dev,
const enum display_pixel_format pixel_format)
{
struct nt35510_data *data = dev->data;
if (pixel_format == PIXEL_FORMAT_RGB_565 || pixel_format == PIXEL_FORMAT_RGB_888) {
data->pixel_format = pixel_format;
return 0;
}
LOG_ERR("Pixel format not supported");
return -ENOTSUP;
}
static int nt35510_check_id(const struct device *dev)
{
const struct nt35510_config *cfg = dev->config;
uint8_t id = 0;
int ret;
ret = mipi_dsi_dcs_read(cfg->mipi_dsi, cfg->channel, NT35510_CMD_RDID2, &id, 1);
if (ret != sizeof(id)) {
LOG_ERR("Failed reading ID (%d)", ret);
return -EIO;
}
if (id != NT35510_ID) {
LOG_ERR("ID 0x%x, expected: 0x%x)", id, NT35510_ID);
return -EINVAL;
}
return 0;
}
static int nt35510_init(const struct device *dev)
{
const struct nt35510_config *cfg = dev->config;
struct nt35510_data *data = dev->data;
struct mipi_dsi_device mdev;
int ret;
if (cfg->reset.port) {
if (!gpio_is_ready_dt(&cfg->reset)) {
LOG_ERR("Reset GPIO device is not ready!");
return -ENODEV;
}
ret = gpio_pin_configure_dt(&cfg->reset, GPIO_OUTPUT_INACTIVE);
if (ret < 0) {
LOG_ERR("Reset display failed! (%d)", ret);
return ret;
}
k_msleep(20);
ret = gpio_pin_set_dt(&cfg->reset, 1);
if (ret < 0) {
LOG_ERR("Enable display failed! (%d)", ret);
return ret;
}
k_msleep(200);
}
/* Store x/y resolution & rotation */
if (cfg->rotation == 0) {
data->xres = cfg->width;
data->yres = cfg->height;
data->orientation = DISPLAY_ORIENTATION_NORMAL;
} else if (cfg->rotation == 90) {
data->xres = cfg->height;
data->yres = cfg->width;
data->orientation = DISPLAY_ORIENTATION_ROTATED_90;
} else if (cfg->rotation == 180) {
data->xres = cfg->width;
data->yres = cfg->height;
data->orientation = DISPLAY_ORIENTATION_ROTATED_180;
} else if (cfg->rotation == 270) {
data->xres = cfg->height;
data->yres = cfg->width;
data->orientation = DISPLAY_ORIENTATION_ROTATED_270;
}
/* Attach to MIPI-DSI host */
mdev.data_lanes = cfg->data_lanes;
mdev.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
if (data->pixel_format == PIXEL_FORMAT_RGB_565) {
mdev.pixfmt = MIPI_DSI_PIXFMT_RGB565;
} else {
mdev.pixfmt = MIPI_DSI_PIXFMT_RGB888;
}
mdev.timings.hactive = data->xres;
mdev.timings.hbp = NT35510_480X800_HBP;
mdev.timings.hfp = NT35510_480X800_HFP;
mdev.timings.hsync = NT35510_480X800_HSYNC;
mdev.timings.vactive = data->yres;
mdev.timings.vbp = NT35510_480X800_VBP;
mdev.timings.vfp = NT35510_480X800_VFP;
mdev.timings.vsync = NT35510_480X800_VSYNC;
ret = mipi_dsi_attach(cfg->mipi_dsi, cfg->channel, &mdev);
if (ret < 0) {
LOG_ERR("MIPI-DSI attach failed! (%d)", ret);
return ret;
}
ret = nt35510_check_id(dev);
if (ret) {
LOG_ERR("Panel ID check failed! (%d)", ret);
return ret;
}
ret = gpio_pin_configure_dt(&cfg->backlight, GPIO_OUTPUT_ACTIVE);
if (ret < 0) {
LOG_ERR("Backlight pin init fail (%d)", ret);
return ret;
}
ret = nt35510_config(dev);
if (ret) {
LOG_ERR("DSI init sequence failed! (%d)", ret);
return ret;
}
ret = nt35510_blanking_off(dev);
if (ret) {
LOG_ERR("Display blanking off failed! (%d)", ret);
return ret;
}
LOG_INF("Init complete(%d)", ret);
return 0;
}
static DEVICE_API(display, nt35510_api) = {
.blanking_on = nt35510_blanking_on,
.blanking_off = nt35510_blanking_off,
.set_brightness = nt35510_set_brightness,
.get_capabilities = nt35510_get_capabilities,
.set_pixel_format = nt35510_set_pixel_format,
};
#define NT35510_DEFINE(n) \
static const struct nt35510_config nt35510_config_##n = { \
.mipi_dsi = DEVICE_DT_GET(DT_INST_BUS(n)), \
.reset = GPIO_DT_SPEC_INST_GET_OR(n, reset_gpios, {0}), \
.backlight = GPIO_DT_SPEC_INST_GET_OR(n, bl_gpios, {0}), \
.data_lanes = DT_INST_PROP_BY_IDX(n, data_lanes, 0), \
.width = DT_INST_PROP(n, width), \
.height = DT_INST_PROP(n, height), \
.channel = DT_INST_REG_ADDR(n), \
.rotation = DT_INST_PROP(n, rotation), \
}; \
\
static struct nt35510_data nt35510_data_##n = { \
.pixel_format = DT_INST_PROP(n, pixel_format), \
}; \
DEVICE_DT_INST_DEFINE(n, &nt35510_init, NULL, &nt35510_data_##n, &nt35510_config_##n, \
POST_KERNEL, CONFIG_DISPLAY_NT35510_INIT_PRIORITY, &nt35510_api);
DT_INST_FOREACH_STATUS_OKAY(NT35510_DEFINE)