Mirrors/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2026-09-22 13:01:16 +03:00
Code Issues Packages Projects Releases Wiki Activity

fix(esp_lcd): yield from SPI ISR when color trans done callback wakes a task

Browse Source 
The return value of on_color_trans_done ("whether a high priority task
has been waken up by this function", see esp_lcd_types.h) was discarded
by the SPI backend. A task unblocked from inside the callback (e.g. via
xSemaphoreGiveFromISR) therefore did not get scheduled until the next
FreeRTOS tick, adding up to 10 ms of latency per color transfer with the
default CONFIG_FREERTOS_HZ=100. The i80 backend already honors the
contract (need_yield -> portYIELD_FROM_ISR); do the same here.
This commit is contained in:
YoungsunLi
2026-09-01 19:33:03 +08:00
committed by morris
parent 2007a7c8db
commit c4e8f1e709
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
components/esp_lcd/spi/esp_lcd_panel_io_spi.c
View File

@@ -441,7 +441,9 @@ static void lcd_spi_post_trans_color_cb(spi_transaction_t *trans)
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);
if (spi_panel_io->on_color_trans_done(&spi_panel_io->base, NULL, spi_panel_io->user_ctx)) {
portYIELD_FROM_ISR();
}
}
}
}