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AMD 发布 HDMI 2.1 FRL 和 DSC 补丁到 Linux 内核,FRL 将默认禁用
Sarfraz Khan · 2026-05-21 · via Wccftech

AMD 在 Linux 上的 HDMI 2.1 突破遇到一个小障碍,因为 FRL(固定速率链路)默认情况下将保持禁用。

AMDGPU HDMI 2.1 FRL 支持将需要最初手动启用,如在最新 Linux 补丁中发现的。

我们最近看到 AMD 将 FRL(固定速率链路)补丁发布到 Linux 内核。,增加了对HDMI 2.1的支持,这长期以来都是一个挑战。该公司再次发布了其开源AMGPU Linux驱动程序的HDMI 2.1 FRL和DSC补丁的第六版。这对Linux上的Radeon用户来说是一个重大发展,因为FRL将允许HDMI超越HDMI 2.0的带宽限制,支持现代显示模式,如高刷新率4K。

然而,正如Phoronix所发现的那样,最新的补丁版本默认禁用了FRL。因此,想要使用或测试HDMI 2.1 FRL支持的用户需要用 "amdgpu.dc_feature_mask=0x400" 参数启动Linux内核。这将手动启用FRL,但这个实现不会被当作用户的默认体验来处理。

A text list titled 'v6' includes: 'Disable FRL by default and add dc_feature_mask 0x400 to enable', 'Add FP guard to new DSC code', and 'bug fix for DSC'.

据说原因与可变刷新率支持有关。据报告,FRL默认被禁用,直到HDMI VRR准备就绪。由于在VRR未启用的情况下启用FRL被认为是对具有FRL功能的显示器的回归,AMD不希望FRL默认工作。一旦VRR支持落地,预计AMD也将默认启用FRL,这将使手动内核参数成为一个临时要求。

尽管如此,AMD 早期包含对开源 AMDGPU 驱动程序 HDMI 2.1 FRL 支持的补丁为 AMD 和 Valve 与 HDMI 论坛长期合作铺平了道路。Valve 的参与尤其关键,因为该公司一直通过 SteamOS 和 Proton 推动 Linux 游戏发展。

新闻来源:免费桌面

Sarfraz Khan Photo

关于作者: 萨尔弗拉兹·汗是一个硬件 是一位专注于PC组件和建设者社区的记者。多年来,他在撰写PC硬件和笔记本电脑方面的文章,其作品曾在多个知名科技出版物上发表。 Sarfraz的实践经验通过他亲自使用和比较不同硬件配置的第一人称描述得以体现,为普通用户提供实用且贴近生活的见解。他的技术分析在爱好者社区中受到同行尊重,并被德国的Igor's Lab等专业硬件网站引用。

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