Rockchip drm主设备

设备device tree:

display_subsystem: display-subsystem {
    compatible = "rockchip,display-subsystem";
    ports = <&vopl_out>, <&vopb_out>;
    status = "disabled";
};

- compatible: Should be "rockchip,display-subsystem"
- ports: Should contain a list of phandles pointing to display interface port
  of vop devices. vop definitions as defined in
  kernel/Documentation/devicetree/bindings/display/rockchip/rockchip-vop.txt

代码位置:

drivers/gpu/drm/rockchip/rockchip_drm_drv.c
drivers/gpu/drm/rockchip/rockchip_drm_drv.h

主要结构:

static struct drm_driver rockchip_drm_driver = {
    .driver_features    = DRIVER_MODESET | DRIVER_GEM |
                  DRIVER_PRIME | DRIVER_ATOMIC |
                  DRIVER_RENDER,
    .preclose        = rockchip_drm_preclose,
    .lastclose        = rockchip_drm_lastclose,
    .get_vblank_counter    = drm_vblank_no_hw_counter,
    .open            = rockchip_drm_open,
    .postclose        = rockchip_drm_postclose,
    .enable_vblank        = rockchip_drm_crtc_enable_vblank,
    .disable_vblank        = rockchip_drm_crtc_disable_vblank,
    .gem_vm_ops        = &rockchip_drm_vm_ops,
    .gem_free_object    = rockchip_gem_free_object,
    .dumb_create        = rockchip_gem_dumb_create,
    .dumb_map_offset    = rockchip_gem_dumb_map_offset,
    .dumb_destroy        = drm_gem_dumb_destroy,
    .prime_handle_to_fd    = drm_gem_prime_handle_to_fd,
    .prime_fd_to_handle    = drm_gem_prime_fd_to_handle,
    .gem_prime_import    = drm_gem_prime_import,
    .gem_prime_export    = drm_gem_prime_export,
    .gem_prime_get_sg_table    = rockchip_gem_prime_get_sg_table,
    .gem_prime_import_sg_table    = rockchip_gem_prime_import_sg_table,
    .gem_prime_vmap        = rockchip_gem_prime_vmap,
    .gem_prime_vunmap    = rockchip_gem_prime_vunmap,
    .gem_prime_mmap        = rockchip_gem_mmap_buf,
#ifdef CONFIG_DEBUG_FS
    .debugfs_init        = rockchip_drm_debugfs_init,
    .debugfs_cleanup    = rockchip_drm_debugfs_cleanup,
#endif
    .ioctls            = rockchip_ioctls,
    .num_ioctls        = ARRAY_SIZE(rockchip_ioctls),
    .fops            = &rockchip_drm_driver_fops,
    .name    = DRIVER_NAME,
    .desc    = DRIVER_DESC,
    .date    = DRIVER_DATE,
    .major    = DRIVER_MAJOR,
    .minor    = DRIVER_MINOR,
};