struct drm_device { struct drm_mode_create_dumb create ; //创建的dumb struct drm_mode_map_dumb map; //内存映射结构体 }; static int drm_create_fb(struct drm_device *bo) { /* create a dumb-buffer, the pixel format is XRGB888 */ bo->create.width = bo->width; bo->create.height...
struct drm_mode_destroy_dumb arg; int ret; memset(&arg, 0, sizeof(arg)); arg.handle = bo->handle; ret = drmIoctl(bo->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg); if (ret) fprintf(stderr, "failed to destroy dumb buffer: %s\n", strerror(errno)); 2.2.6 释放 gem handle struct dr...
struct drm_mode_destroy_dumb arg; int ret; memset(&arg, 0, sizeof(arg)); arg.handle = bo->handle; ret = drmIoctl(bo->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg); if (ret) fprintf(stderr, "failed to destroy dumb buffer: %s\n", strerror(errno)); 2.2.6 释放 gem handle struct dr...
static int modeset_create_fb(int fd, struct buffer_object *bo) { struct drm_mode_create_dumb create = {}; struct drm_mode_map_dumb map = {}; create.width = bo->width; create.height = bo->height; create.bpp = 32; drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &create); bo->pitch...
Atomic Modeset VBlank Dumb Buffer Cursor & Primary Plane Framebuffer CRC 校验 Plane Composition GEM Prime Import 下面就跟着我一起来学习,如何从0到1实现一个 VKMS 驱动吧! 【嵌入式物联网单片机学习资料】整理了全套精华学习资料,除了教程外,还有一些大厂面经+笔试面试题,开源共享给大家。
dumb_create 回调接口用于创建 gem object,并分配物理 buffer。这里直接使用 CMA helper 函数来实现; fb_create 回调接口用于创建 framebuffer object,并绑定 gem objects。这里直接使用 CMA helper 函数实现。 fops 中的 mmap 接口,用于将 dumb buffer 映射到 userspace,它依赖 drm driver 中的 gem_vm_ops 实现...
// 设置驱动支持DRIVER_MODESET | DRIVER_ATOMIC模式nv_drm_driver.driver_features |= DRIVER_MODESET | DRIVER_ATOMIC;nv_drm_driver.master_set = nv_drm_master_set;nv_drm_driver.master_drop = nv_drm_master_drop;nv_drm_driver.dumb_create = nv_drm_dumb_create;nv_drm_driver.dumb_map_offset ...
KMS: DRM_IOCTL_MODE_CREATE_DUMB failed: Invalid argument Settingsudo chmod 666 /dev/dri/*as suggested in#9523 (comment)does not help Output ofvainfo --display drm --device /dev/dri/card0: libva info: VA-API version 1.14.0 libva info: User environment variable requested driver 'd3d12' ...
│ ├── drm_dumb_buffers.c │ ├── drm_edid.c │ ├── drm_edid_load.c │ ├── drm_encoder.c--encoder初始化、去初始化、注册、注销等。│ ├── drm_encoder_slave.c │ ├── drm_fb_cma_helper.c--DRM Framebuffer使用CMA分配内存。│ ├── drm_fb_helper.c--DRM Framebu...
modeset_create_fb(int fd, struct buffer_object *bo, uint32_t color) { struct drm_mode_create_dumb create = {}; struct drm_mode_map_dumb map = {}; uint32_t i; create.width = bo->width; create.height = bo->height; create.bpp = 32; drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB,...