TouchGFX incorrect pixels

[davidra7]

Hi All,

I need your help , I am configuring TouchGFX with DSI ( STM32F778AI ) with RM67162 360X320 pixels display.

Before adding TouchGFX I was able to write using LTDC,DMA2D and DSIHost without any pixel shift ( also without TE ).

After I added TouchGFX I suppose to have pixel shift , Basically what I done I tried to draw Red color on full screen and I have lines from top to bottom ( attached picture ).

TE is 60HZ coming from display.

Buffer configured to external memory to address 0xC0000000

I tried :

1. LTDC clock slower to 10 MHZ - still the same.
2. DSI-Host clock slower to 16 MHZ - still the same.

void HAL_DSI_TearingEffectCallback(DSI_HandleTypeDef *hdsi)
{
/* USER CODE BEGIN DSI_TearingEffectCallback */
 
 /* Used when the OTM8009 LCD driver is selected  */
 
  GPIO::set(GPIO::VSYNC_FREQ);
 
    HAL::getInstance()->vSync();
    OSWrappers::signalVSync();
 
    if (!doubleBufferingEnabled && HAL::getInstance())
    {
        // In single buffering, only require that the system waits for display update to be finished if we
        // actually intend to update the display in this frame.
        HAL::getInstance()->lockDMAToFrontPorch(refreshRequested);
    }
 
    if (refreshRequested && !displayRefreshing)
    {
        // We have an update pending.
        if (doubleBufferingEnabled && HAL::getInstance())
        {
            // Swap frame buffers immediately instead of waiting for the task to be scheduled in.
            // Note: task will also swap when it wakes up, but that operation is guarded and will not have
            // any effect if already swapped.
            HAL::getInstance()->swapFrameBuffers();
        }
 
 
        // Transfer a quarter screen of pixel data.
        HAL_DSI_Refresh(hdsi);
        displayRefreshing = true;
    } else
    {
        GPIO::clear(GPIO::VSYNC_FREQ);
    }
 
/* USER CODE END DSI_TearingEffectCallback */
}

void HAL_DSI_EndOfRefreshCallback(DSI_HandleTypeDef *hdsi)
{
/* USER CODE BEGIN DSI_EndOfRefreshCallback */
 
    if (displayRefreshing)
    {
 
		// Otherwise we are done refreshing.
		__HAL_DSI_WRAPPER_DISABLE(hdsi);
		LTDC_LAYER(&hltdc, 0)->CFBAR = (uint32_t)currFbBase;
		__HAL_LTDC_RELOAD_IMMEDIATE_CONFIG(&hltdc);
		//LCD_SetUpdateRegionLeft(); //Set display column to 0-399
		__HAL_DSI_WRAPPER_ENABLE(hdsi);
 
		GPIO::clear(GPIO::VSYNC_FREQ);
 
		displayRefreshing = false;
		if (HAL::getInstance())
		{
			// Signal to the framework that display update has finished.
			HAL::getInstance()->frontPorchEntered();
		}
    }
 
/* USER CODE END DSI_EndOfRefreshCallback */
}

 Any Help?

Thanks!!!

David