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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 15202df249
commit 0960a602f4
4 changed files with 20 additions and 4 deletions
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2
components/esp_lcd/dsi/esp_lcd_mipi_dsi_bus.c
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@ -16,7 +16,7 @@ static const char *TAG = "lcd.dsi.bus";
#define MIPI_DSI_DEFAULT_TIMEOUT_CLOCK_FREQ_MHZ 10 #define MIPI_DSI_DEFAULT_TIMEOUT_CLOCK_FREQ_MHZ 10
// TxClkEsc frequency must be configured between 2 and 20 MHz // TxClkEsc frequency must be configured between 2 and 20 MHz
#define MIPI_DSI_DEFAULT_ESCAPE_CLOCK_FREQ_MHZ 10 #define MIPI_DSI_DEFAULT_ESCAPE_CLOCK_FREQ_MHZ 18
esp_err_t esp_lcd_new_dsi_bus(const esp_lcd_dsi_bus_config_t *bus_config, esp_lcd_dsi_bus_handle_t *ret_bus) esp_err_t esp_lcd_new_dsi_bus(const esp_lcd_dsi_bus_config_t *bus_config, esp_lcd_dsi_bus_handle_t *ret_bus)
{ {

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; bool yield_needed = false;
esp_lcd_dpi_panel_t *dpi_panel = (esp_lcd_dpi_panel_t *)user_data; 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; uint8_t fb_index = dpi_panel->cur_fb_index;
dw_gdma_link_list_handle_t link_list = dpi_panel->link_lists[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 // restart the DMA transfer, keep refreshing the LCD
dw_gdma_block_markers_t markers = { dw_gdma_block_markers_t markers = {
.is_valid = true, .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_enable_dpi_output(hal->bridge, true);
mipi_dsi_brg_ll_update_dpi_config(hal->bridge); 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; return ESP_OK;
} }

5
components/hal/esp32p4/include/hal/mipi_dsi_host_ll.h
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@ -82,7 +82,7 @@ static inline void mipi_dsi_host_ll_power_on_off(dsi_host_dev_t *dev, bool on)
*/ */
static inline void mipi_dsi_host_ll_set_timeout_clock_division(dsi_host_dev_t *dev, uint32_t div) static inline void mipi_dsi_host_ll_set_timeout_clock_division(dsi_host_dev_t *dev, uint32_t div)
{ {
HAL_FORCE_MODIFY_U32_REG_FIELD(dev->clkmgr_cfg, to_clk_division, div - 1); HAL_FORCE_MODIFY_U32_REG_FIELD(dev->clkmgr_cfg, to_clk_division, div);
} }
/** /**
@ -95,7 +95,8 @@ static inline void mipi_dsi_host_ll_set_timeout_clock_division(dsi_host_dev_t *d
*/ */
static inline void mipi_dsi_host_ll_set_escape_clock_division(dsi_host_dev_t *dev, uint32_t div) static inline void mipi_dsi_host_ll_set_escape_clock_division(dsi_host_dev_t *dev, uint32_t div)
{ {
HAL_FORCE_MODIFY_U32_REG_FIELD(dev->clkmgr_cfg, tx_esc_clk_division, div - 1); HAL_ASSERT(div > 1 && div < 256);
HAL_FORCE_MODIFY_U32_REG_FIELD(dev->clkmgr_cfg, tx_esc_clk_division, div);
} }
/** /**

2
examples/peripherals/lcd/mipi_dsi/main/idf_component.yml
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@ -1,4 +1,4 @@
dependencies: dependencies:
lvgl/lvgl: "9.2.0" lvgl/lvgl: "9.2.2"
esp_lcd_ili9881c: "^1.0.0" esp_lcd_ili9881c: "^1.0.0"
esp_lcd_ek79007: "^1.0.0" esp_lcd_ek79007: "^1.0.0"