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Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.
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zephyr/drivers/display/display_mcux_elcdif.c

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/*
* Copyright 2019-24, NXP
* Copyright (c) 2022, Basalte bv
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_imx_elcdif
#include <zephyr/drivers/display.h>
#include <zephyr/drivers/pinctrl.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/kernel.h>
#include <fsl_elcdif.h>
#ifdef CONFIG_HAS_MCUX_CACHE
#include <fsl_cache.h>
#endif
#ifdef CONFIG_MCUX_ELCDIF_PXP
#include <zephyr/drivers/dma.h>
#include <zephyr/drivers/dma/dma_mcux_pxp.h>
#endif
#include <zephyr/logging/log.h>
#include <zephyr/irq.h>
LOG_MODULE_REGISTER(display_mcux_elcdif, CONFIG_DISPLAY_LOG_LEVEL);
/* Define the heap size. 512 bytes of padding are included for kernel heap structures */
K_HEAP_DEFINE(display_heap, CONFIG_MCUX_ELCDIF_FB_NUM * CONFIG_MCUX_ELCDIF_FB_SIZE + 512);
static const uint32_t supported_fmts =
PIXEL_FORMAT_BGR_565 | PIXEL_FORMAT_ARGB_8888 | PIXEL_FORMAT_RGB_888;
struct mcux_elcdif_config {
LCDIF_Type *base;
void (*irq_config_func)(const struct device *dev);
elcdif_rgb_mode_config_t rgb_mode;
const struct pinctrl_dev_config *pincfg;
const struct gpio_dt_spec backlight_gpio;
const struct device *pxp;
};
struct mcux_elcdif_data {
/* Pointer to active framebuffer */
const uint8_t *active_fb;
/* Pointers to driver allocated framebuffers */
uint8_t *fb[CONFIG_MCUX_ELCDIF_FB_NUM];
enum display_pixel_format pixel_format;
size_t pixel_bytes;
size_t fb_bytes;
elcdif_rgb_mode_config_t rgb_mode;
struct k_sem sem;
/* Tracks index of next active driver framebuffer */
uint8_t next_idx;
#ifdef CONFIG_MCUX_ELCDIF_PXP
/* Given to when PXP completes operation */
struct k_sem pxp_done;
#endif
};
#ifdef CONFIG_MCUX_ELCDIF_PXP
static void mcux_elcdif_pxp_callback(const struct device *dma_dev, void *user_data,
uint32_t channel, int ret)
{
struct mcux_elcdif_data *data = user_data;
k_sem_give(&data->pxp_done);
}
#endif /* CONFIG_MCUX_ELCDIF_PXP */
static int mcux_elcdif_write(const struct device *dev, const uint16_t x, const uint16_t y,
const struct display_buffer_descriptor *desc, const void *buf)
{
const struct mcux_elcdif_config *config = dev->config;
struct mcux_elcdif_data *dev_data = dev->data;
int h_idx;
const uint8_t *src;
uint8_t *dst;
int ret = 0;
bool full_fb = false;
__ASSERT((dev_data->pixel_bytes * desc->pitch * desc->height) <= desc->buf_size,
"Input buffer too small");
LOG_DBG("W=%d, H=%d, @%d,%d", desc->width, desc->height, x, y);
if ((x == 0) && (y == 0) && (desc->width == config->rgb_mode.panelWidth) &&
(desc->height == config->rgb_mode.panelHeight) && (desc->pitch == desc->width)) {
/* We can use the display buffer directly, no need to copy it */
LOG_DBG("Setting FB from %p->%p", (void *)dev_data->active_fb, (void *)buf);
dev_data->active_fb = buf;
full_fb = true;
} else if ((x == 0) && (y == 0) && (desc->width == config->rgb_mode.panelHeight) &&
(desc->height == config->rgb_mode.panelWidth) && (desc->pitch == desc->width) &&
IS_ENABLED(CONFIG_MCUX_ELCDIF_PXP)) {
/* With the PXP, we can rotate this display buffer to align
* with output dimensions
*/
LOG_DBG("Setting FB from %p->%p", (void *)dev_data->active_fb, (void *)buf);
dev_data->active_fb = buf;
full_fb = true;
} else {
/* We must use partial framebuffer copy */
if (CONFIG_MCUX_ELCDIF_FB_NUM == 0) {
LOG_ERR("Partial display refresh requires driver framebuffers");
return -ENOTSUP;
} else if (dev_data->active_fb != dev_data->fb[dev_data->next_idx]) {
/*
* We must copy the entire current framebuffer to new
* buffer, since we wil change the active buffer
* address
*/
src = dev_data->active_fb;
dst = dev_data->fb[dev_data->next_idx];
memcpy(dst, src, dev_data->fb_bytes);
}
/* Now, write the display update into active framebuffer */
src = buf;
dst = dev_data->fb[dev_data->next_idx];
dst += dev_data->pixel_bytes * (y * config->rgb_mode.panelWidth + x);
for (h_idx = 0; h_idx < desc->height; h_idx++) {
memcpy(dst, src, dev_data->pixel_bytes * desc->width);
src += dev_data->pixel_bytes * desc->pitch;
dst += dev_data->pixel_bytes * config->rgb_mode.panelWidth;
}
LOG_DBG("Setting FB from %p->%p", (void *)dev_data->active_fb,
(void *)dev_data->fb[dev_data->next_idx]);
/* Set new active framebuffer */
dev_data->active_fb = dev_data->fb[dev_data->next_idx];
}
#ifdef CONFIG_HAS_MCUX_CACHE
DCACHE_CleanByRange((uint32_t)dev_data->active_fb, dev_data->fb_bytes);
#endif
#ifdef CONFIG_MCUX_ELCDIF_PXP
if (full_fb) {
/* Configure PXP using DMA API, and rotate/flip frame */
struct dma_config pxp_dma = {0};
struct dma_block_config pxp_block = {0};
/* Source buffer is input to display_write, we will
* place modified output into a driver framebuffer.
*/
dev_data->active_fb = dev_data->fb[dev_data->next_idx];
pxp_block.source_address = (uint32_t)buf;
pxp_block.dest_address = (uint32_t)dev_data->active_fb;
pxp_block.block_size = desc->buf_size;
/* DMA slot sets pixel format and rotation angle */
if (dev_data->pixel_format == PIXEL_FORMAT_BGR_565) {
pxp_dma.dma_slot = DMA_MCUX_PXP_FMT(DMA_MCUX_PXP_FMT_RGB565);
} else if (dev_data->pixel_format == PIXEL_FORMAT_RGB_888) {
pxp_dma.dma_slot = DMA_MCUX_PXP_FMT(DMA_MCUX_PXP_FMT_RGB888);
} else if (dev_data->pixel_format == PIXEL_FORMAT_ARGB_8888) {
pxp_dma.dma_slot = DMA_MCUX_PXP_FMT(DMA_MCUX_PXP_FMT_ARGB8888);
} else {
/* Cannot rotate */
return -ENOTSUP;
}
if (IS_ENABLED(CONFIG_MCUX_ELCDIF_PXP_ROTATE_90)) {
pxp_dma.dma_slot |= DMA_MCUX_PXP_CMD(DMA_MCUX_PXP_CMD_ROTATE_90);
} else if (IS_ENABLED(CONFIG_MCUX_ELCDIF_PXP_ROTATE_180)) {
pxp_dma.dma_slot |= DMA_MCUX_PXP_CMD(DMA_MCUX_PXP_CMD_ROTATE_180);
} else if (IS_ENABLED(CONFIG_MCUX_ELCDIF_PXP_ROTATE_270)) {
pxp_dma.dma_slot |= DMA_MCUX_PXP_CMD(DMA_MCUX_PXP_CMD_ROTATE_270);
} else {
pxp_dma.dma_slot |= DMA_MCUX_PXP_CMD(DMA_MCUX_PXP_CMD_ROTATE_0);
}
/* DMA linked_channel sets the flip direction */
if (IS_ENABLED(CONFIG_MCUX_ELCDIF_PXP_FLIP_HORIZONTAL)) {
pxp_dma.linked_channel |= DMA_MCUX_PXP_FLIP(DMA_MCUX_PXP_FLIP_HORIZONTAL);
} else if (IS_ENABLED(CONFIG_MCUX_ELCDIF_PXP_FLIP_VERTICAL)) {
pxp_dma.linked_channel |= DMA_MCUX_PXP_FLIP(DMA_MCUX_PXP_FLIP_VERTICAL);
} else if (IS_ENABLED(CONFIG_MCUX_ELCDIF_PXP_FLIP_BOTH)) {
pxp_dma.linked_channel |= DMA_MCUX_PXP_FLIP(DMA_MCUX_PXP_FLIP_BOTH);
} else {
pxp_dma.linked_channel |= DMA_MCUX_PXP_FLIP(DMA_MCUX_PXP_FLIP_DISABLE);
}
pxp_dma.channel_direction = MEMORY_TO_MEMORY;
pxp_dma.source_data_size = desc->width * dev_data->pixel_bytes;
pxp_dma.dest_data_size = config->rgb_mode.panelWidth * dev_data->pixel_bytes;
/* Burst lengths are heights of source/dest buffer in pixels */
pxp_dma.source_burst_length = desc->height;
pxp_dma.dest_burst_length = config->rgb_mode.panelHeight;
pxp_dma.head_block = &pxp_block;
pxp_dma.dma_callback = mcux_elcdif_pxp_callback;
pxp_dma.user_data = dev_data;
ret = dma_config(config->pxp, 0, &pxp_dma);
if (ret < 0) {
return ret;
}
ret = dma_start(config->pxp, 0);
if (ret < 0) {
return ret;
}
k_sem_take(&dev_data->pxp_done, K_FOREVER);
} else {
LOG_WRN("PXP rotation/flip will not work correctly unless a full sized "
"framebuffer is provided");
}
#endif /* CONFIG_MCUX_ELCDIF_PXP */
/* Queue next framebuffer */
ELCDIF_SetNextBufferAddr(config->base, (uint32_t)dev_data->active_fb);
#if CONFIG_MCUX_ELCDIF_FB_NUM != 0
/* Update index of active framebuffer */
dev_data->next_idx = (dev_data->next_idx + 1) % CONFIG_MCUX_ELCDIF_FB_NUM;
#endif
/* Enable frame buffer completion interrupt */
ELCDIF_EnableInterrupts(config->base, kELCDIF_CurFrameDoneInterruptEnable);
/* Wait for frame send to complete */
k_sem_take(&dev_data->sem, K_FOREVER);
return ret;
}
static int mcux_elcdif_display_blanking_off(const struct device *dev)
{
#if DT_ANY_INST_HAS_PROP_STATUS_OKAY(backlight_gpios)
const struct mcux_elcdif_config *config = dev->config;
if (config->backlight_gpio.port) {
return gpio_pin_set_dt(&config->backlight_gpio, 1);
}
#endif /* DT_ANY_INST_HAS_PROP_STATUS_OKAY(backlight_gpios) */
return -ENOSYS;
}
static int mcux_elcdif_display_blanking_on(const struct device *dev)
{
#if DT_ANY_INST_HAS_PROP_STATUS_OKAY(backlight_gpios)
const struct mcux_elcdif_config *config = dev->config;
if (config->backlight_gpio.port) {
return gpio_pin_set_dt(&config->backlight_gpio, 0);
}
#endif /* DT_ANY_INST_HAS_PROP_STATUS_OKAY(backlight_gpios) */
return -ENOSYS;
}
static int mcux_elcdif_set_pixel_format(const struct device *dev,
const enum display_pixel_format pixel_format)
{
struct mcux_elcdif_data *dev_data = dev->data;
const struct mcux_elcdif_config *config = dev->config;
if (!(pixel_format & supported_fmts)) {
LOG_ERR("Unsupported pixel format");
return -ENOTSUP;
}
dev_data->pixel_format = pixel_format;
dev_data->pixel_bytes = DISPLAY_BITS_PER_PIXEL(pixel_format) / BITS_PER_BYTE;
dev_data->fb_bytes =
config->rgb_mode.panelWidth * config->rgb_mode.panelHeight * dev_data->pixel_bytes;
for (int i = 0; i < CONFIG_MCUX_ELCDIF_FB_NUM; i++) {
k_heap_free(&display_heap, dev_data->fb[i]);
dev_data->fb[i] =
k_heap_aligned_alloc(&display_heap, 64, dev_data->fb_bytes, K_FOREVER);
if (dev_data->fb[i] == NULL) {
LOG_ERR("Could not allocate memory for framebuffers");
return -ENOMEM;
}
memset(dev_data->fb[i], 0, dev_data->fb_bytes);
}
dev_data->rgb_mode = config->rgb_mode;
if (pixel_format == PIXEL_FORMAT_BGR_565) {
dev_data->rgb_mode.pixelFormat = kELCDIF_PixelFormatRGB565;
} else if (pixel_format == PIXEL_FORMAT_RGB_888) {
dev_data->rgb_mode.pixelFormat = kELCDIF_PixelFormatRGB888;
} else if (pixel_format == PIXEL_FORMAT_ARGB_8888) {
dev_data->rgb_mode.pixelFormat = kELCDIF_PixelFormatXRGB8888;
}
ELCDIF_RgbModeSetPixelFormat(config->base, dev_data->rgb_mode.pixelFormat);
return 0;
}
static int mcux_elcdif_set_orientation(const struct device *dev,
const enum display_orientation orientation)
{
if (orientation == DISPLAY_ORIENTATION_NORMAL) {
return 0;
}
LOG_ERR("Changing display orientation not implemented");
return -ENOTSUP;
}
static void mcux_elcdif_get_capabilities(const struct device *dev,
struct display_capabilities *capabilities)
{
const struct mcux_elcdif_config *config = dev->config;
memset(capabilities, 0, sizeof(struct display_capabilities));
capabilities->x_resolution = config->rgb_mode.panelWidth;
capabilities->y_resolution = config->rgb_mode.panelHeight;
capabilities->supported_pixel_formats = supported_fmts;
capabilities->current_pixel_format = ((struct mcux_elcdif_data *)dev->data)->pixel_format;
capabilities->current_orientation = DISPLAY_ORIENTATION_NORMAL;
}
static void mcux_elcdif_isr(const struct device *dev)
{
const struct mcux_elcdif_config *config = dev->config;
struct mcux_elcdif_data *dev_data = dev->data;
uint32_t status;
status = ELCDIF_GetInterruptStatus(config->base);
ELCDIF_ClearInterruptStatus(config->base, status);
if (config->base->CUR_BUF == ((uint32_t)dev_data->active_fb)) {
/* Disable frame completion interrupt, post to
* sem to notify that frame send is complete.
*/
ELCDIF_DisableInterrupts(config->base, kELCDIF_CurFrameDoneInterruptEnable);
k_sem_give(&dev_data->sem);
}
}
static int mcux_elcdif_init(const struct device *dev)
{
const struct mcux_elcdif_config *config = dev->config;
struct mcux_elcdif_data *dev_data = dev->data;
int err;
err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);
if (err) {
return err;
}
#if DT_ANY_INST_HAS_PROP_STATUS_OKAY(backlight_gpios)
if (config->backlight_gpio.port) {
err = gpio_pin_configure_dt(&config->backlight_gpio, GPIO_OUTPUT_ACTIVE);
if (err) {
return err;
}
}
#endif /* DT_ANY_INST_HAS_PROP_STATUS_OKAY(backlight_gpios) */
k_sem_init(&dev_data->sem, 0, 1);
#ifdef CONFIG_MCUX_ELCDIF_PXP
k_sem_init(&dev_data->pxp_done, 0, 1);
if (!device_is_ready(config->pxp)) {
LOG_ERR("PXP device is not ready");
return -ENODEV;
}
#endif
config->irq_config_func(dev);
/* Set default pixel format obtained from device tree */
mcux_elcdif_set_pixel_format(dev, dev_data->pixel_format);
dev_data->active_fb = dev_data->fb[0];
ELCDIF_RgbModeInit(config->base, &dev_data->rgb_mode);
ELCDIF_RgbModeStart(config->base);
return 0;
}
static DEVICE_API(display, mcux_elcdif_api) = {
.blanking_on = mcux_elcdif_display_blanking_on,
.blanking_off = mcux_elcdif_display_blanking_off,
.write = mcux_elcdif_write,
.get_capabilities = mcux_elcdif_get_capabilities,
.set_pixel_format = mcux_elcdif_set_pixel_format,
.set_orientation = mcux_elcdif_set_orientation,
};
#define MCUX_ELCDIF_DEVICE_INIT(id) \
PINCTRL_DT_INST_DEFINE(id); \
static void mcux_elcdif_config_func_##id(const struct device *dev); \
static const struct mcux_elcdif_config mcux_elcdif_config_##id = { \
.base = (LCDIF_Type *)DT_INST_REG_ADDR(id), \
.irq_config_func = mcux_elcdif_config_func_##id, \
.rgb_mode = \
{ \
.panelWidth = DT_INST_PROP(id, width), \
.panelHeight = DT_INST_PROP(id, height), \
.hsw = DT_PROP(DT_INST_CHILD(id, display_timings), hsync_len), \
.hfp = DT_PROP(DT_INST_CHILD(id, display_timings), hfront_porch), \
.hbp = DT_PROP(DT_INST_CHILD(id, display_timings), hback_porch), \
.vsw = DT_PROP(DT_INST_CHILD(id, display_timings), vsync_len), \
.vfp = DT_PROP(DT_INST_CHILD(id, display_timings), vfront_porch), \
.vbp = DT_PROP(DT_INST_CHILD(id, display_timings), vback_porch), \
.polarityFlags = \
(DT_PROP(DT_INST_CHILD(id, display_timings), hsync_active) \
? kELCDIF_HsyncActiveHigh \
: kELCDIF_HsyncActiveLow) | \
(DT_PROP(DT_INST_CHILD(id, display_timings), vsync_active) \
? kELCDIF_VsyncActiveHigh \
: kELCDIF_VsyncActiveLow) | \
(DT_PROP(DT_INST_CHILD(id, display_timings), de_active) \
? kELCDIF_DataEnableActiveHigh \
: kELCDIF_DataEnableActiveLow) | \
(DT_PROP(DT_INST_CHILD(id, display_timings), \
pixelclk_active) \
? kELCDIF_DriveDataOnRisingClkEdge \
: kELCDIF_DriveDataOnFallingClkEdge), \
.dataBus = LCDIF_CTRL_LCD_DATABUS_WIDTH( \
DT_INST_ENUM_IDX(id, data_bus_width)), \
}, \
.pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(id), \
.backlight_gpio = GPIO_DT_SPEC_INST_GET_OR(id, backlight_gpios, {0}), \
IF_ENABLED(CONFIG_MCUX_ELCDIF_PXP, \
(.pxp = DEVICE_DT_GET(DT_INST_PHANDLE(id, nxp_pxp)),))}; \
static struct mcux_elcdif_data mcux_elcdif_data_##id = { \
.next_idx = 0, \
.pixel_format = DT_INST_PROP(id, pixel_format), \
}; \
DEVICE_DT_INST_DEFINE(id, &mcux_elcdif_init, NULL, &mcux_elcdif_data_##id, \
&mcux_elcdif_config_##id, POST_KERNEL, CONFIG_DISPLAY_INIT_PRIORITY, \
&mcux_elcdif_api); \
static void mcux_elcdif_config_func_##id(const struct device *dev) \
{ \
IRQ_CONNECT(DT_INST_IRQN(id), DT_INST_IRQ(id, priority), mcux_elcdif_isr, \
DEVICE_DT_INST_GET(id), 0); \
irq_enable(DT_INST_IRQN(id)); \
}
DT_INST_FOREACH_STATUS_OKAY(MCUX_ELCDIF_DEVICE_INIT)