这样通过 libdrm 对显示资源进行统一访问,libdrm 将命令传递到内核最终由 DRM 驱动接管各应用的请求并处理,可以有效避免访问冲突。 KMS(Kernel Mode Setting) KMS 属于 DRM 框架下的一个大模块,主要负责两个功能:显示参数设置及显示画面控制。这两个基本功能可以说是显示驱动必须基本的能力,在 DRM 框架下,为了将这...
1.3GEMGraphicExecution Manager，主要负责显示buffer的分配和释放，也是GPU唯一用到DRM的地方。当然kms也会使用GEM中分配的buffer来进行显示，后面会涉及到相关处理。1.4基本元素 DRM框架涉及到的元素很多，大致如下：KMS：CRTC，ENCODER，CONNECTOR，PLANE，FB，VBLANK，propertyGEM：DUMB、PRIME、fence 元素 说明 CRTC ...
drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Composite sync not supported\n", connector->base.id, connector->name); } /* it is incorrect if hsync/vsync width is zero,跳过 */ if (!hsync_pulse_width || !vsync_pulse_width) { drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Incorrect Detailed timing...
32 + drm_dbg_kms(drm, 33 + "ln0_1:0x%x ln2_3:0x%x align:0x%x sink:0x%x adj_req0_1:0x%x adj_req2_3:0x%x\n", 34 + link_status[0], link_status[1], link_status[2], 35 + link_status[3], link_status[4], link_status[5]); ...
drm_dbg_kms(&dev_priv->drm, "Cannot compute valid DSC parameters for Input Bpp = %d" - "Compressed BPP = " BPP_X16_FMT "\n", + "Compressed BPP = " DRM_X16_FMT "\n", pipe_config->pipe_bpp, - BPP_X16_ARGS(pipe_config->dsc.compressed_bpp_x16)); ...
drm_dbg_kms(&i915->drm, "Trying bpp %d\n", bpp); - link_bpp_x16 = to_bpp_x16(dsc ? bpp : - intel_dp_output_bpp(crtc_state->output_format, bpp)); + link_bpp_x16 = drm_x16_from_int(dsc ? bpp : + intel_dp_output_bpp(crtc_state->output_format, bpp)); ...
drm_dbg(drm, "failed to allocate buffer with size %zu\n", size); ret = -ENOMEM; goto error; } return cma_obj; error: drm_gem_object_put(&cma_obj->base); return ERR_PTR(ret); } MMAP: GEM对提供了mmap()的支持,通过映射后usersapce可以访问GEM对象的backing memory。
of_device_is_available(iommu->parent)) {dev_dbg(dev, "no iommu attached for %s, using non-...
drm_dbg_kms(&i915->drm, "Loading %s\n", dmc->fw_path); schedule_work(&dmc->work); queue_work(i915->unordered_wq, &dmc->work); return;2 changes: 1 addition & 1 deletion 2 drivers/gpu/drm/i915/display/intel_dp.c Original file line numberDiff line numberDiff line change @@ ...
drm(7), drm-kms(7), drm-prime(7), drmAvailable(3), drmOpen(3), drm- intel(7), drm-radeon(7), drm-nouveau(7) NOTES Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. ...