Aren't there actual worked examples? Setting the DSI to two lanes, 500 MHz, and perhaps a pixel clock in the 27 MHz region?
16 bits at 62.5 MHz = 1Gbps
27 MHz / 800 / 480 = 70 Hz, assume this gets close to 60 Hz with exact line totals
Aren't these all in the OTM8009A sources and related include files?
STM32Cube_FW_F4_V1.24.0\Drivers\BSP\Components\otm8009a\otm8009a.c
STM32Cube_FW_F4_V1.24.0\Drivers\BSP\STM32469I-Discovery\stm32469i_discovery_lcd.c
And the Kiss of Death screen?
KoD KM-040TMP-02-0621 (WVGA)
https://community.st.com/s/question/0D50X00009XkYPw/km040tmp02a
/* Width and Height in Portrait mode */
#define OTM8009A_480X800_WIDTH ((uint16_t)480) /* LCD PIXEL WIDTH */
#define OTM8009A_480X800_HEIGHT ((uint16_t)800) /* LCD PIXEL HEIGHT */
/* Width and Height in Landscape mode */
#define OTM8009A_800X480_WIDTH ((uint16_t)800) /* LCD PIXEL WIDTH */
#define OTM8009A_800X480_HEIGHT ((uint16_t)480) /* LCD PIXEL HEIGHT */
/**
* @brief OTM8009A_480X800 Timing parameters for Portrait orientation mode
*/
#define OTM8009A_480X800_HSYNC ((uint16_t)2) /* Horizontal synchronization */
#define OTM8009A_480X800_HBP ((uint16_t)34) /* Horizontal back porch */
#define OTM8009A_480X800_HFP ((uint16_t)34) /* Horizontal front porch */
#define OTM8009A_480X800_VSYNC ((uint16_t)1) /* Vertical synchronization */
#define OTM8009A_480X800_VBP ((uint16_t)15) /* Vertical back porch */
#define OTM8009A_480X800_VFP ((uint16_t)16) /* Vertical front porch */
/**
* @brief OTM8009A_800X480 Timing parameters for Landscape orientation mode
* Same values as for Portrait mode in fact.
*/
#define OTM8009A_800X480_HSYNC OTM8009A_480X800_VSYNC /* Horizontal synchronization */
#define OTM8009A_800X480_HBP OTM8009A_480X800_VBP /* Horizontal back porch */
#define OTM8009A_800X480_HFP OTM8009A_480X800_VFP /* Horizontal front porch */
#define OTM8009A_800X480_VSYNC OTM8009A_480X800_HSYNC /* Vertical synchronization */
#define OTM8009A_800X480_VBP OTM8009A_480X800_HBP /* Vertical back porch */
#define OTM8009A_800X480_VFP OTM8009A_480X800_HFP /* Vertical front porch */
/**
* @brief Initializes the DSI LCD.
* The ititialization is done as below:
* - DSI PLL ititialization
* - DSI ititialization
* - LTDC ititialization
* - OTM8009A LCD Display IC Driver ititialization
* @retval LCD state
*/
uint8_t BSP_LCD_InitEx(LCD_OrientationTypeDef orientation)
{
DSI_PLLInitTypeDef dsiPllInit;
DSI_PHY_TimerTypeDef PhyTimings;
static RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
uint32_t LcdClock = 27429; /*!< LcdClk = 27429 kHz */
uint32_t laneByteClk_kHz = 0;
uint32_t VSA; /*!< Vertical start active time in units of lines */
uint32_t VBP; /*!< Vertical Back Porch time in units of lines */
uint32_t VFP; /*!< Vertical Front Porch time in units of lines */
uint32_t VACT; /*!< Vertical Active time in units of lines = imageSize Y in pixels to display */
uint32_t HSA; /*!< Horizontal start active time in units of lcdClk */
uint32_t HBP; /*!< Horizontal Back Porch time in units of lcdClk */
uint32_t HFP; /*!< Horizontal Front Porch time in units of lcdClk */
uint32_t HACT; /*!< Horizontal Active time in units of lcdClk = imageSize X in pixels to display */
/* Toggle Hardware Reset of the DSI LCD using
* its XRES signal (active low) */
BSP_LCD_Reset();
/* Call first MSP Initialize only in case of first initialization
* This will set IP blocks LTDC, DSI and DMA2D
* - out of reset
* - clocked
* - NVIC IRQ related to IP blocks enabled
*/
BSP_LCD_MspInit();
/*************************DSI Initialization***********************************/
/* Base address of DSI Host/Wrapper registers to be set before calling De-Init */
hdsi_eval.Instance = DSI;
HAL_DSI_DeInit(&(hdsi_eval));
#if !defined(USE_STM32469I_DISCO_REVA)
dsiPllInit.PLLNDIV = 125;
dsiPllInit.PLLIDF = DSI_PLL_IN_DIV2;
dsiPllInit.PLLODF = DSI_PLL_OUT_DIV1;
#else
dsiPllInit.PLLNDIV = 100;
dsiPllInit.PLLIDF = DSI_PLL_IN_DIV5;
dsiPllInit.PLLODF = DSI_PLL_OUT_DIV1;
#endif
laneByteClk_kHz = 62500; /* 500 MHz / 8 = 62.5 MHz = 62500 kHz */
/* Set number of Lanes */
hdsi_eval.Init.NumberOfLanes = DSI_TWO_DATA_LANES;
/* TXEscapeCkdiv = f(LaneByteClk)/15.62 = 4 */
hdsi_eval.Init.TXEscapeCkdiv = laneByteClk_kHz/15620;
HAL_DSI_Init(&(hdsi_eval), &(dsiPllInit));
...
