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feat(mipi_dsi): enable underrun error interrupt

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This commit is contained in:
morris
2024-06-24 18:36:47 +08:00
parent 38b737511c
commit c86a301736
3 changed files with 19 additions and 3 deletions
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15
components/esp_lcd/dsi/esp_lcd_panel_dpi.c
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@@ -80,9 +80,20 @@ static bool dma_trans_done_cb(dw_gdma_channel_handle_t chan, const dw_gdma_trans
{
bool yield_needed = false;
esp_lcd_dpi_panel_t *dpi_panel = (esp_lcd_dpi_panel_t *)user_data;
mipi_dsi_hal_context_t *hal = &dpi_panel->bus->hal;
uint8_t fb_index = dpi_panel->cur_fb_index;
dw_gdma_link_list_handle_t link_list = dpi_panel->link_lists[fb_index];
// clear the interrupt status
uint32_t error_status = mipi_dsi_brg_ll_get_interrupt_status(hal->bridge);
mipi_dsi_brg_ll_clear_interrupt_status(hal->bridge, error_status);
if (unlikely(error_status & MIPI_DSI_LL_EVENT_UNDERRUN)) {
// when an underrun happens, the LCD display may already becomes blue
// it's too late to recover the display, so we just print an error message
// as a hint to the user that he should optimize the memory bandwidth (with AXI-ICM)
ESP_DRAM_LOGE(TAG, "can't fetch data from external memory fast enough, underrun happens");
}
// restart the DMA transfer, keep refreshing the LCD
dw_gdma_block_markers_t markers = {
.is_valid = true,
@@ -440,6 +451,10 @@ static esp_err_t dpi_panel_init(esp_lcd_panel_t *panel)
mipi_dsi_brg_ll_enable_dpi_output(hal->bridge, true);
mipi_dsi_brg_ll_update_dpi_config(hal->bridge);
// enable the underrun interrupt, we use this as a signal of bandwidth shortage
// note, we opt to not install a dedicated interrupt handler just for this error condition, instead, we check it in the DMA callback
mipi_dsi_brg_ll_enable_interrupt(hal->bridge, MIPI_DSI_LL_EVENT_UNDERRUN, true);
return ESP_OK;
}