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spi: define tranfer max bit length in LL

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This commit is contained in:
morris
2022-03-08 13:25:43 +08:00
parent ffe19e0c8d
commit 2c7cfdd784
9 changed files with 43 additions and 49 deletions
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32
components/esp_lcd/src/esp_lcd_panel_io_spi.c
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@@ -11,12 +11,15 @@
#include <sys/cdefs.h>
#include "esp_lcd_panel_io_interface.h"
#include "esp_lcd_panel_io.h"
#include "hal/spi_ll.h"
#include "driver/spi_master.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "esp_check.h"
#include "esp_lcd_common.h"
#define LCD_SPI_MAX_DATA_SIZE (SPI_LL_DATA_MAX_BIT_LEN / 8)
static const char *TAG = "lcd_panel.io.spi";
static esp_err_t panel_io_spi_tx_param(esp_lcd_panel_io_t *io, int lcd_cmd, const void *param, size_t param_size);
@@ -29,7 +32,7 @@ typedef struct {
spi_transaction_t base;
struct {
unsigned int dc_gpio_level: 1;
unsigned int trans_is_color: 1;
unsigned int en_trans_done_cb: 1;
} flags;
} lcd_spi_trans_descriptor_t;
@@ -214,7 +217,6 @@ static esp_err_t panel_io_spi_tx_color(esp_lcd_panel_io_t *io, int lcd_cmd, cons
spi_transaction_t *spi_trans = NULL;
lcd_spi_trans_descriptor_t *lcd_trans = NULL;
esp_lcd_panel_io_spi_t *spi_panel_io = __containerof(io, esp_lcd_panel_io_spi_t, base);
size_t next_trans = 0;
// before issue a polling transaction, need to wait queued transactions finished
for (size_t i = 0; i < spi_panel_io->num_trans_inflight; i++) {
@@ -245,26 +247,25 @@ static esp_err_t panel_io_spi_tx_color(esp_lcd_panel_io_t *io, int lcd_cmd, cons
do {
size_t chunk_size = color_size;
if (spi_panel_io->num_trans_inflight >= spi_panel_io->queue_size) {
if (spi_panel_io->num_trans_inflight < spi_panel_io->queue_size) {
// get the next available transaction
lcd_trans = &spi_panel_io->trans_pool[spi_panel_io->num_trans_inflight];
} else {
// transaction pool has used up, recycle one transaction
ret = spi_device_get_trans_result(spi_panel_io->spi_dev, &spi_trans, portMAX_DELAY);
ESP_GOTO_ON_ERROR(ret, err, TAG, "recycle spi transactions failed");
lcd_trans = __containerof(spi_trans, lcd_spi_trans_descriptor_t, base);
spi_panel_io->num_trans_inflight--;
}
// get the next available transaction
lcd_trans = &spi_panel_io->trans_pool[next_trans];
next_trans = (next_trans + 1) % spi_panel_io->queue_size;
memset(lcd_trans, 0, sizeof(lcd_spi_trans_descriptor_t));
// MOSI_DBITLEN holds the size minus 1, so we can actually fit 1 additional byte,
// hence each chunk can have up to (SPI_MS_DATA_BITLEN_V + 1) bytes
if (chunk_size > (SPI_MS_DATA_BITLEN_V + 1) / 8) {
// SPI per-transfer size has its limitation, if the color buffer is too big, we need to split it into multiple trunks
if (chunk_size > LCD_SPI_MAX_DATA_SIZE) {
// cap the transfer size to the maximum supported by the bus
chunk_size = (SPI_MS_DATA_BITLEN_V + 1) / 8;
chunk_size = LCD_SPI_MAX_DATA_SIZE;
} else {
// mark as sending LCD color data only at the last round to avoid premature completion callback
lcd_trans->flags.trans_is_color = 1;
// mark en_trans_done_cb only at the last round to avoid premature completion callback
lcd_trans->flags.en_trans_done_cb = 1;
}
lcd_trans->base.user = spi_panel_io;
@@ -287,8 +288,7 @@ static esp_err_t panel_io_spi_tx_color(esp_lcd_panel_io_t *io, int lcd_cmd, cons
// move on to the next chunk
color = (const uint8_t *)color + chunk_size;
color_size -= chunk_size;
}
while (color_size > 0); // continue while we have remaining data to transmit
} while (color_size > 0); // continue while we have remaining data to transmit
err:
return ret;
@@ -307,7 +307,7 @@ static void lcd_spi_post_trans_color_cb(spi_transaction_t *trans)
{
esp_lcd_panel_io_spi_t *spi_panel_io = trans->user;
lcd_spi_trans_descriptor_t *lcd_trans = __containerof(trans, lcd_spi_trans_descriptor_t, base);
if (lcd_trans->flags.trans_is_color) {
if (lcd_trans->flags.en_trans_done_cb) {
if (spi_panel_io->on_color_trans_done) {
spi_panel_io->on_color_trans_done(&spi_panel_io->base, NULL, spi_panel_io->user_ctx);
}