lv_linux_drm.h

lv_linux_drm_set_file

Configure the DRM device file and connector for a display.

Sets the DRM device file path and connector ID to use for the specified display. The DRM device file is typically located at /dev/dri/cardN where N is the card number. The connector ID specifies which physical output (HDMI, VGA, etc.) to use.

lv_result_t lv_linux_drm_set_file(lv_display_t *disp, const char *file, int64_t connector_id)

Returns: lv_result_t — LV_RESULT_OK if the initialization succeeded or LV_RESULT_INVALID if it failed

lv_linux_drm_set_mode_cb

Set a callback function for custom DRM mode selection to override the default mode selection behavior

The default mode selection behavior is selecting the native mode

void lv_linux_drm_set_mode_cb(lv_display_t *disp, lv_linux_drm_select_mode_cb_t callback)

lv_linux_drm_mode_get_horizontal_resolution

Get the horizontal resolution of a DRM mode

int32_t lv_linux_drm_mode_get_horizontal_resolution(const lv_linux_drm_mode_t *mode)

Returns: int32_t — horizontal resolution in pixels, or 0 if mode is invalid

lv_linux_drm_mode_get_vertical_resolution

Get the vertical resolution of a DRM mode

int32_t lv_linux_drm_mode_get_vertical_resolution(const lv_linux_drm_mode_t *mode)

Returns: int32_t — vertical resolution in pixels, or 0 if mode is invalid

lv_linux_drm_mode_get_refresh_rate

Get the refresh rate of a DRM mode

int32_t lv_linux_drm_mode_get_refresh_rate(const lv_linux_drm_mode_t *mode)

Returns: int32_t — refresh rate in Hz, or 0 if mode is invalid

lv_linux_drm_mode_get_raw

Get the underlying DRM mode object.

void * lv_linux_drm_mode_get_raw(const lv_linux_drm_mode_t *mode)

Returns: void * — pointer to the underlying drmModeModeInfo, or NULL if mode is invalid. Requires including <xf86drmMode.h> to dereference.

lv_linux_drm_create

Create a new Linux DRM display.

Creates and initializes a new LVGL display using the Linux DRM (Direct Rendering Manager) subsystem for hardware-accelerated graphics output.

lv_display_t * lv_linux_drm_create(void)

Returns: lv_display_t * — Pointer to the created display object, or NULL on failure

lv_linux_drm_find_device_path

Automatically find a suitable DRM device path.

Scans the system for available DRM devices and returns the path to a suitable device file that can be used with lv_linux_drm_set_file().

char * lv_linux_drm_find_device_path(void)

Returns: char * — Dynamically allocated string containing the device path (must be freed with lv_free()), or NULL if no suitable device is found

lv_linux_drm_mode_is_preferred

Check if a DRM mode is the preferred mode for the display

bool lv_linux_drm_mode_is_preferred(const lv_linux_drm_mode_t *mode)

Returns: bool — true if this is the preferred/native mode, false otherwise