--- title: Kernel 5.18: Milestones for the road ahead | daily.dev description: Collabora's kernel team contributed numerous patches to Linux 5.18, released in May 2022. Key highlights include: disabling the Accelerator Coherence Port... canonical: https://daily.dev/posts/kernel-5-18-milestones-for-the-road-ahead-m6htyiyhb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Kernel 5.18: Milestones for the road ahead | daily.dev og:description: Collabora's kernel team contributed numerous patches to Linux 5.18, released in May 2022. Key highlights include: disabling the Accelerator Coherence Port... og:url: https://daily.dev/posts/kernel-5-18-milestones-for-the-road-ahead-m6htyiyhb og:image: https://api.daily.dev/og/posts/m6htYIyHB.png og:image:alt: Kernel 5.18: Milestones for the road ahead og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Kernel 5.18: Milestones for the road ahead **[Collabora Blog](https://daily.dev/sources/collabora)** · 4 min read · 0 upvotes · 0 comments ## Summary Collabora's kernel team contributed numerous patches to Linux 5.18, released in May 2022. Key highlights include: disabling the Accelerator Coherence Port (ACP) to enable Arm Mali Valhall GPU support on MediaTek 8192 SoC; fixes for MediaTek UART and display driver suspension ordering; audio enablement on iMX8MN BSH SystemMaster board for the Apertis embedded Linux distribution; V4L2 HEVC UAPI improvements aligned with ITU-T H.265 spec; fixes for baseline-profile H264 decoding via MediaTek VCODEC and GStreamer; AMD SPI controller patches for Steam Deck audio stack support; and a kselftest build framework fix enabling out-of-tree builds. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What was blocking Arm Mali Valhall GPU support on MediaTek 8192 in the Linux kernel? The Accelerator Coherence Port (ACP) was the main obstacle — it is enabled by default on some devices but needs to be disabled for Valhall GPU to work on MediaTek 8192 SoC. Linux 5.18 includes a patch that disables the offending ACP, marking a milestone toward full Valhall GPU mainline support, though more work remains. _Kernel developers tracking Valhall GPU mainlining progress follow developments like this on daily.dev._ ### What V4L2 HEVC UAPI changes landed in Linux 5.18? Linux 5.18 includes improvements to the V4L2 HEVC UAPI that align it with the ITU-T H.265/HEVC specification, preparing the interface for stabilization and further de-staging. The MediaTek video CODEC driver regression was also fixed so encoder and decoder drivers can now be registered in any order. _Engineers working on media driver upstreaming keep up with V4L2 spec changes on daily.dev._ --- Tags: [#gpu](https://daily.dev/tags/gpu), [#linux](https://daily.dev/tags/linux) [View this post on daily.dev](https://daily.dev/posts/kernel-5-18-milestones-for-the-road-ahead-m6htyiyhb) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Kernel 5.18: Milestones for the road ahead","url":"https://daily.dev/posts/kernel-5-18-milestones-for-the-road-ahead-m6htyiyhb","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/kernel-5-18-milestones-for-the-road-ahead-m6htyiyhb"},"datePublished":"2026-08-11T08:54:14.576Z","dateModified":"2026-10-15T02:18:13.258Z","description":"Collabora's kernel team contributed numerous patches to Linux 5.18, released in May 2022. 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