Visible to Intel only — GUID: dvq1618909696414
Ixiasoft
Visible to Intel only — GUID: dvq1618909696414
Ixiasoft
39.5. TMO IP Software API
Software Driver Example
int main() { int ret = -1; /* Initialize datapath Video Timing Generator instance /* This API function is not part of the TMO driver. */ /* Hence, it is up to the user to implement it, to provide VIDEO_WIDTH, VIDEO_HEIGHT values */ datapath_vtiming_config(VTIMING_TMO_BASE, 1); /* Initialize TMO IP instance*/ intel_vvp_base_t base = INTEL_VVP_TMO_BASE; intel_vvp_tmo_instance_t intel_vvp_tmo_instance; /*Query TMO IP instance, to know whether is has been initialized correctly. */ /* A value == '0' indicates TMO IP has been initialized correctly */ ret = intel_vvp_tmo_init_instance(&intel_vvp_tmo_instance, base); if (ret == 0) { /* TMO IP Bypass control */ uint32_t bypass = 0; intel_vvp_tmo_set_bypass(&intel_vvp_tmo_instance, bypass); printf("Intel VVP TMO Bypass %s\n\n", bypass ? "ENABLED" : "DISABLED"); /* Initialize TMO IP to specific video resolution */ intel_vvp_tmo_set_resolution(&intel_vvp_tmo_instance, VIDEO_WIDTH, VIDEO_HEIGHT); /* Update TMO IP volume control values */ intel_vvp_tmo_set_volume(&intel_vvp_tmo_instance, VOLUME_CTL_USER); intel_vvp_tmo_set_threshold(&intel_vvp_tmo_instance, INT_THR_USER); printf("TMO initialization done\n"); fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK); while (1) { /* This function checks if TMO IP bypass mode and/or volume control values need to be updated */ /* but it is not part of the TMO IP SW driver package. Hence, customers are expected */ /* to implement their own function according to their specific needs */ process_user_input(&intel_vvp_tmo_instance); /* This part of the code is for debug purpose only */ /* Two conditions are checked: */ /* Condition #1: Missing data collection per tile */ static const uint32_t num_rows = 4; static const uint32_t row_mask = ~(~0u << num_rows); /* Read TMO IP debug register to check for error conditions */ uint32_t reg_val = intel_vvp_tmo_get_debug(&intel_vvp_tmo_instance; if (reg_val & row_mask) { printf ("Timeout rows: "; for (uint32_t i = 0; i < num_rows; ++ i) { if (reg_val & (0x1 << i)) printf("%"PRIu32" ", i); } printf("\n"; } /* Condition #2: Missing entire video frame */ if (reg_val & 0x100) { printf ("FSYNC toggle error\n"; } /* Set TMO IP debug register to capture new error conditions */ intel_vvp_tmo_set_debug(&intel_vvp_tmo_instance, reg_val); } } else { printf("Error initializing intel_vvp_tmo instance: %d\n", ret); } return ret; }
The TMO IP software driver does not include the process_user_input(&intel_vvp_tmo_instance) function, as its implementation depends on your system requirements and specifications. You can query and update TMO strength volume values in various ways. For example, you can implement the process_user_input(&intel_vvp_tmo_instance) in this way:
void process_user_input(intel_vvp_tmo_instance* instance) { int c = getchar(); static const int32_t VOL_STEP = 5; static const int32_t TS_STEP = 1000; int vol_delta = 0; int ts_delta = 0; if(c != EOF) { switch(c) { case 'w': case 'W': vol_delta = VOL_STEP; break; case 's': case 'S': vol_delta = -VOL_STEP; break; case 'd': case 'D': ts_delta = TS_STEP; break; case 'a': case 'A': ts_delta = - TS_STEP; break; case 'b': case 'B': { uint32_t bypass = intel_vvp_tmo_get_bypass(instance); bypass ^= 0x1; intel_vvp_tmo_set_bypass(instance, bypass); printf("TMO Bypass %s\n\n", bypass ? "ENABLED" : "DISABLED"); } break; default: break; } if(vol_delta || ts_delta) { int32_t vol = (int32_t)(intel_vvp_tmo_get_volume(instance)); int32_t ts = (int32_t)(intel_vvp_tmo_get_threshold(instance)); vol += vol_delta; ts += ts_delta; if(vol > 100) vol = 100; if(vol < 0) vol = 0; if(ts > 9000) ts = 9000; if(ts < 0) ts = 0; printf("VOL: %"PRIi32"\n", vol); printf("TS: %"PRIi32"\n", ts); intel_vvp_tmo_set_volume(instance, (uint32_t)(vol)); intel_vvp_tmo_set_threshold(instance, (uint32_t)(ts)); } } }
All the API functions require a pointer to intel_vvp_tmo_instance_t structure as the first parameter. The structure represents an individual instance of TMO IP and defined as following:
typedef struct intel_vvp_tmo_instance { intel_vvp_tmo_base_t base; } intel_vvp_tmo_instance_t;
Where:
intel_vvp_tmo_base_t base is a platform specific access handler that the driver uses to access configuration and control registers of the IP. Default definition for a bare metal environment is 32-bit unsigned integer representing base address of the TMO IP on the external CPU bus.
The internal driver uses the following macros to access individual registers of the IP:
- tmoss_read_reg(x) – read register
- tmoss_write_reg(x,y) – write register
Where:
x is the byte offset of the register from the IP core base address
y is the 32-bit register value to write.
Default bare metal implementation of the IP register access provided in the file intel_vvp_tmo_io.h. Provide alternative implementations through separate header files included conditionally from intel_vvp_tmo_io.h.
Byte offsets of all TMO IP registers are defined in the file intel_vvp_tmo_regs.h.
Name | Description |
---|---|
intel_vvp_tmo_init_instance | Initialize TMO IP driver instance |
intel_vvp_tmo_set_bypass | Set TMO IP into bypass mode |
intel_vvp_tmo_get_bypass | Return current setting of the bypass mode |
intel_vvp_tmo_set_resolution | Set input video resolution for TMO IP |
intel_vvp_tmo_set_volume | Adjust fine-level TMO volume as a percentage, which allows more granularity when setting TMO strength value |
intel_vvp_tmo_get_volume | Return current level of TMO strength |
intel_vvp_tmo_set_threshold | Adjust coarse level TMO volume, which allows setting TMO strength value |
intel_vvp_tmo_get_threshold | Return current value of fine-level TMO volume adjustment |
intel_vvp_tmo_set_roi_en | Enable or disable the region of interest mode |
intel_vvp_tmo_set_roi_swap | Enable or disable swap region in region of interest mode |
intel_vvp_tmo_set_roi_horizontal_x0x1 | Set horizontal starting and ending positions of the region of interest, implicitly enables region of interest mode |
intel_vvp_tmo_set_roi_vertical_y0y1 | Set vertical starting and ending positions of the region of interest, implicitly enables region of interest mode |
intel_vvp_tmo_get_roi_en | Return current value of the region of interest enable bit |
intel_vvp_tmo_get_roi_swap | Return current value of the region of interest swap bit |
intel_vvp_tmo_get_roi_horizontal_x0 | Return current value of the horizontal starting position of the region of interest |
intel_vvp_tmo_get_roi_horizontal_x1 | Return current value of the horizontal ending position of the region of interest |
intel_vvp_tmo_get_roi_vertical_y0 | Return current value of the vertical starting position of the region of interest |
intel_vvp_tmo_get_roi_vertical_y1 | Return current value of the vertical ending position of the region of interest |
intel_vvp_tmo_get_pip | Return current configuration value of the number of pixels-in-parallel |
intel_vvp_tmo_get_resolution_width | Return width of the current video resolution in number of pixels |
intel_vvp_tmo_get_resolution_height | Return height of the current video resolution in number of lines |
intel_vvp_tmo_get_debug | Return current value of debug information register |
intel_vvp_tmo_set_debug | Clear individual bits in debug information register |
intel_vvp_tmo_init_instance
- int intel_vvp_tmo_init_instance(intel_vvp_tmo_instance_t* instance, intel_vvp_tmo_base_t base)
- Description
- Initialize TMO software driver instance
- Arguments
- instance – pointer to the TMO software driver instance structure
- base – platform specific IP access handle. In a bare metal environment this is typically defined as 32-bit unsigned integer representing base address of the IP on the external CPU bus
- Return Value
- Zero on success, negative integer otherwise
intel_vvp_tmo_set_bypass
- void intel_vvp_tmo_set_bypass(intel_vvp_tmo_instance_t* instance, uint32_t bypass)
- Description
- Enable/disable TMO bypass mode. With bypass mode the TMO IP does not process the incoming video stream and passes it as is.
- Arguments
- instance – pointer to the TMO software driver instance structure
- bypass - 1 – enable bypass mode; 0 – disable bypass mode
- Return Value
- void
intel_vvp_tmo_get_bypass
- uint32_t intel_vvp_tmo_get_bypass(intel_vvp_tmo_instance_t* instance)
- Description
- Get the current setting of the bypass mode
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- 1 – bypass mode is enabled; 0 – bypass mode is disabled
intel_vvp_tmo_set_resolution
- void intel_vvp_tmo_set_resolution(intel_vvp_tmo_instance_t* instance, const uint32_t width, const uint32_t height)
- Description
- Set up TMO IP for the required video resolution
- Arguments
- instance – pointer to the TMO software driver instance structure
- width - video width in pixels e.g. 1920
- height - video height in lines e.g. 1080
- Return Value
- void
intel_vvp_tmo_set_volume
- void intel_vvp_tmo_set_volume(intel_vvp_tmo_instance_t* instance, const uint32_t volume)
- Description
- Set desired tone enhancement strength
- Arguments
- instance – pointer to the TMO software driver instance structure
- volume - tone enhancement strength in the range [0..100]
- Return Value
- void
intel_vvp_tmo_get_volume
- uint32_t intel_vvp_tmo_get_volume(intel_vvp_tmo_instance_t* instance)
- Description
- Get currently configured tone enhancement strength
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current tone enhancement strength in the range [0..100]
intel_vvp_tmo_set_threshold
- void intel_vvp_tmo_set_threshold(intel_vvp_tmo_instance_t* instance, const uint32_t threshold)
- Description
- Set fine-level tone enhancement strength
- Arguments
- instance – pointer to the TMO software driver instance structure
- threshold – fine level tone enhancement strength in the range [0..10000]
- Return Value
- void
intel_vvp_tmo_get_threshold
- uint32_t intel_vvp_tmo_get_threshold(intel_vvp_tmo_instance_t* instance)
- Description
- Get currently configured fine-level tone enhancement strength
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current fine level tone enhancement strength in the range [0..10000]
intel_vvp_tmo_set_roi_en
- void intel_vvp_tmo_set_roi_en(intel_vvp_tmo_instance_t* instance, uint32_t roi_en)
- Description
- Enable or disable the region of interest mode
- Arguments
-
instance – pointer to the TMO software driver instance
-
region of interest enable – 1 – enable region of interest mode, 0 – disable region of interest mode
- Return Value
- void
intel_vvp_tmo_set_roi_swap
- void intel_vvp_tmo_set_roi_swap(intel_vvp_tmo_instance_t* instance, uint32_t roi_swap)
- Description
- Enable or disable swap region in region of interest mode
- Arguments
-
instance – pointer to the TMO software driver instance
region of interest swap – 1 – swap the region of interest, 0 – do not swap the region of interest
- Return Value
- void
intel_vvp_tmo_set_roi_horizontal_x0x1
-
void intel_vvp_tmo_set_roi_horizontal_x0x1(intel_vvp_tmo_instance_t* instance, const uint32_t pos_x0, const uint32_t pos_x1)
- Description
- Set horizontal starting and ending positions of the region of interest, implicitly enables region of interest mode
- Arguments
-
instance – pointer to the TMO software driver instance
-
horizontal region of interest starting position – starting pixel position of the region of interest in the width dimension, divided by pixels-in-parallel
-
horizontal region of interest ending position – ending pixel position of the region of interest in the width dimension, divided by pixels-in-parallel
- Return Value
- void
intel_vvp_tmo_set_roi_vertical_y0y1
-
void intel_vvp_tmo_set_roi_vertical_y0y1(intel_vvp_tmo_instance_t* instance, const uint32_t pos_y0, const uint32_t pos_y1)
- Description
- Set vertical starting and ending positions of the region of interest, implicitly enables region of interest mode
- Arguments
-
instance – pointer to the TMO software driver instance
-
vertical region of interest starting position – starting line position of the region of interest in the height dimension
-
vertical region of interest ending position – ending line position of the region of interest in the height dimension
- Return Value
- void
intel_vvp_tmo_get_roi_en
-
uint32_t intel_vvp_tmo_get_roi_en(intel_vvp_tmo_instance_t* instance)
- Description
- Return current value of the region of interest enable bit
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- 1 – region of interest mode is enabled; 0 – region of interest mode is disabled
intel_vvp_tmo_get_roi_swap
-
uint32_t intel_vvp_tmo_get_roi_swap(intel_vvp_tmo_instance_t* instance)
- Description
- Return current value of the region of interest swap bit
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- 1 – region of interest is swapped; 0 – region of interest is not swapped
intel_vvp_tmo_get_roi_horizontal_x0
-
uint32_t intel_vvp_tmo_get_roi_horizontal_x0(intel_vvp_tmo_instance_t* instance)
- Description
- Return current value of the horizontal starting position of the region of interest
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current value of the horizontal starting pixel position of the region of interest, divided by pixels-in-parallel
intel_vvp_tmo_get_roi_horizontal_x1
-
uint32_t intel_vvp_tmo_get_roi_horizontal_x1(intel_vvp_tmo_instance_t* instance)
- Description
- Return current value of the horizontal ending position of the region of interest
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current value of the horizontal ending pixel position of the region of interest, divided by pixels-in-parallel
intel_vvp_tmo_get_roi_vertical_y0
-
uint32_t intel_vvp_tmo_get_roi_vertical_y0(intel_vvp_tmo_instance_t* instance)
- Description
- Return current value of the vertical starting position of the region of interest
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current value of the vertical starting line position of the region of interest
intel_vvp_tmo_get_roi_vertical_y1
-
uint32_t intel_vvp_tmo_get_roi_vertical_y1(intel_vvp_tmo_instance_t* instance)
- Description
- Return current value of the vertical ending position of the region of interest
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current value of the vertical ending line position of the region of interest
intel_vvp_tmo_get_pip
-
uint32_t intel_vvp_tmo_get_pip(intel_vvp_tmo_instance_t* instance)
- Description
- Return current configuration value of the number of pixels-in-parallel
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Configuration value of the number of pixels-in-parallel
intel_vvp_tmo_get_resolution_width
-
uint32_t intel_vvp_tmo_get_resolution_width(intel_vvp_tmo_instance_t* instance)
- Description
- Return width of the current video resolution in number of pixels
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current value of the video resolution width in number of pixels
intel_vvp_tmo_get_resolution_height
-
uint32_t intel_vvp_tmo_get_resolution_height(intel_vvp_tmo_instance_t* instance)
- Description
- Return height of the current video resolution in number of lines
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current value of the video resolution height in number of lines
intel_vvp_tmo_get_debug
- uint32_t intel_vvp_tmo_get_debug(intel_vvp_tmo_instance_t* instance)
- Description
- Get current value of the Debug information register Ext_Reg_0xA0
- Arguments
- instance – pointer to the TMO software driver instance structure
- Return Value
- Current value of Ext_Reg_0xA0 as 32-bit unsigned integer
intel_vvp_tmo_set_debug
- void intel_vvp_tmo_set_debug(intel_vvp_tmo_instance_t* instance, uint32_t val)
- Description
- Clear individual bits of the Debug information register Ext_Reg_0xA0
- Arguments
- instance – pointer to the TMO software driver instance structure
- val - bit mask of the bits within the debug register to clear
- Return Value
- void