->小于DRM_CORE_IOCTL_COUNT是DRM core固定的ioctl命令drm_ioctls。 ->drm_ioctl_kernel ->drm_ioctl_permit--对调用者进行权限检查。 ->func()--执行ioctl命令对应的函数。 drm_ioctls[]定义了丰富的命令列表: /*Ioctl table*/staticconststructdrm_ioctl_desc drm_ioctls[] ={ DRM_IOCTL_DEF(DRM_IOCTL_V...
1.drm_auth.c drm_auth负责的是权限管理,同一时刻只有一个程序能成为drm master程序,其他非master程序需要通过drm master获取相应的授权,因此drm有提供ioctl的子命令DRM_IOCTL_SET_MASTER 设置master,相应的也有释放master的命令 drm_ioctl -- DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, 0) ---...
1.ioctl入口函数 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb_ioctl, 0), 2.drm_mode_addfb_ioctl后续会调用到drm_mode_addfb 3.接下来我们进入drm_mode_addfb查看具体实现内容,它主要作用是向图形设备创建一个新的FB。函数会先检查dev是否支持DRIVER_MODESET特性,如果不支持则返回EOPNOTSUPP。接...
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, drm_syncobj_timeline_wait_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_EVENTFD, drm_syncobj_eventfd_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_RESET, drm_syncobj_reset_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF(DRM_...
drm_crtc结构体类型如下: /** * struct drm_crtc - central CRTC control structure * * Each CRTC may have one or more connectors associated with it. This structure * allows the CRTC to be controlled. */ struct drm_crtc { /*挂载到&drm_mode_config.crtc_list*/ ...
IOCTL_CDROM_LOAD_MEDIA IOCTL (ntddcdrm.h) Prihvatite izazov 21. maj – 21. jun 2024. Registrujte se odmah Odbaci obaveštenje Learn Otkrivanje Dokumentacija proizvoda Jezici razvoja Teme Prijavi se Razvojni inženjer za hardver za Windows...
IOCTL_CDROM_SET_SPEED IOCTL (ntddcdrm.h) We use optional cookies to improve your experience on our websites, such as through social media connections, and to display personalized advertising based on your online activity. If you reject optional cookies, only cookies necessary to provide you ...
Beginning with Windows Vista, CDROM class drivers do not use this IOCTL. Prior to Windows Vista, this IOCTL was used for audio playback on older CD-ROM drives that supported direct audio output in hardware. Client applications should use theMedia Control Interface (MCI) APIrather t...
This is used to * implement the GETCRTC IOCTL. * * Do not call this function directly, use * drm_atomic_crtc_get_property() instead. * * This callback is optional if the driver does not support any * driver-private atomic properties. * * RETURNS: * * 0 on success, -EINVAL if ...
IO_STACK_LOCATION 结构中的 Parameters.DeviceIoControl.InputBufferLength 指示输入缓冲区的大小(以字节为单位),该大小必须为 = sizeof (GET_CONFIGURATION_IOCTL_INPUT) 。输出缓冲区驱动程序在 Irp-AssociatedIrp.SystemBuffer> 的缓冲区中返回功能和配置文件数据。 数据以 GET_CONFIGURATION_HEADER 类型的标...