这里需要介绍一下pitches、offsets为啥是个数组,数组的长度为DRM_FORMAT_MAX_PLANES,通过这个宏我们大概可以了解到每种DRM格式应该包含多个color plane,因此数组元素的值依次对应每个color plane;比如RGB格式由R、G、B三种颜色图层组成。 2.2struct drm_format_info linux内核使用struct drm_format_info表示DRM格式信息,...
drm.mode_config.max_width = 8192; drm.mode_config.max_height = 8192; drm.mode_config.funcs = &vkms_mode_funcs; drm_universal_plane_init(&drm, &primary, 0, &vkms_plane_funcs, vkms_formats, ARRAY_SIZE(vkms_formats), NULL, DRM_PLANE_TYPE_PRIMARY, NULL); drm_crtc_init_with_planes...
struct drm_plane表示一个输入到CRTC的图像源,上游是drm_framebuffer,下游是drm_crtc。 structdrm_plane {structdrm_device *dev;structlist_head head;char*name;structdrm_modeset_lock mutex;structdrm_mode_objectbase;uint32_t possible_crtcs;uint32_t*format_types;unsignedintformat_count;boolformat_default...
fourcc = DRM_FORMAT_ARGB8888; ret = drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &creq); if (ret < 0) { fprintf(stderr, "cannot create dumb buffer (%d): %m\n", errno); return -errno; } 3.7 提交DRM请求 代码调用实例如下: int drmModeAtomicCommit(int fd, drmModeAtomicReqPtr req, ...
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...
_CRTC1#defineCRTC_MASKGENMASK(NB_CRTC-1,0)uint32_tvirtsoc_drm_debug_mask=0xff;module_param_named(virtsoc_debug,virtsoc_drm_debug_mask,uint,0644);staticconstuint32_tvirtsoc_graphics_formats[]={DRM_FORMAT_ARGB8888,DRM_FORMAT_XRGB8888,DRM_FORMAT_ABGR8888,DRM_FORMAT_RGB888,DRM_FORMAT_...
DPU_FORMAT_IS_UBWC(fmt)); 1312+ pdpu->pipe_cfg.src_rect=state->src; 1313+ 1314+ /* state->src is 16.16, src_rect is not */ 1315+ pdpu->pipe_cfg.src_rect.x1>>=16; 1316+ pdpu->pipe_cfg.src_rect.x2>>=16; 1317+
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Format 颜色格式,ARGB888 XRGB888 YUV420 等 再次强调,以上这些功能都是由硬件直接完成的,而非软件实现。 在DRM框架中,Plane又分为如下3种类型: 类型 说明 Cursor 光标图层,一般用于PC系统,用于显示鼠标 Overlay 叠加图层,通常用于YUV格式的视频图层 Primary 主要图层,通常用于仅支持RGB格式的简单图层 ...
Takes pixels data from CRTC and converts it to the format suitable for any attached connectors. #Connectors (struct drm_connector) Represents display interface (HDMI, DisplayPort, DSI, VGA), transmits signal to display, detects display, exposes mode, ...