--- title: I3C Hub & HDR-DDR Support Merged For Linux 7.4 | daily.dev description: Linux 7.4 merges I3C hub support and HDR-DDR fixes for the MIPI I3C subsystem. The core I3C master code now supports a generic I3C hub framework for bridging... canonical: https://daily.dev/posts/i3c-hub-hdr-ddr-support-merged-for-linux-7-4-dq3kezitd twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: I3C Hub & HDR-DDR Support Merged For Linux 7.4 | daily.dev og:description: Linux 7.4 merges I3C hub support and HDR-DDR fixes for the MIPI I3C subsystem. The core I3C master code now supports a generic I3C hub framework for bridging... og:url: https://daily.dev/posts/i3c-hub-hdr-ddr-support-merged-for-linux-7-4-dq3kezitd og:image: https://api.daily.dev/og/posts/dQ3KeZitd.png og:image:alt: I3C Hub & HDR-DDR Support Merged For Linux 7.4 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. # I3C Hub & HDR-DDR Support Merged For Linux 7.4 **[Phoronix](https://daily.dev/sources/phoronix)** · 1 min read · 0 upvotes · 0 comments ## Summary Linux 7.4 merges I3C hub support and HDR-DDR fixes for the MIPI I3C subsystem. The core I3C master code now supports a generic I3C hub framework for bridging communication across connected devices, plus a new driver for the NXP P3H2x4x multi-port I3C hub family. The hub patch series went through 20 rounds of review before landing. HDR-DDR support in the mipi-i3c-hci driver now handles dual edge sampling with throughput up to 25 Mbps. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What new I3C features are included in Linux kernel 7.4? Linux 7.4 adds a generic I3C hub framework built on adapted core I3C master code, enabling bridging and expansion across MIPI I3C connected devices. It also introduces a new driver for the NXP P3H2x4x family of multi-port I3C hub devices. The hub patch series went through 20 rounds of code review before merging into mainline. _Kernel developers tracking I3C hub support can follow driver changes like this on daily.dev._ ### What throughput does I3C HDR-DDR mode support in the Linux mipi-i3c-hci driver? HDR-DDR (High Data Rate Double Data Rate) support in the mipi-i3c-hci driver provides dual edge sampling with throughput up to 25 Mbps. Fixes and clean-ups for this mode were merged into Linux kernel 7.4, enabling faster transfers over MIPI I3C connections. _Developers evaluating I3C transfer speeds can keep up with kernel driver updates on daily.dev._ ## Similar posts on daily.dev - [Linux I3C Gains "HDR" Support For Faster Data Transfers](https://daily.dev/posts/linux-i3c-gains-hdr-support-for-faster-data-transfers-blpvpf5ds) · Phoronix · 0 upvotes · 0 comments - [New Media Drivers Merged For Linux 7.1](https://daily.dev/posts/new-media-drivers-merged-for-linux-7-1-x02q7tvwc) · Phoronix · 0 upvotes · 0 comments - [AMD Preps More Graphics Driver Improvements For Linux 7.3](https://daily.dev/posts/amd-preps-more-graphics-driver-improvements-for-linux-7-3-lpdj6ghad) · Phoronix · 0 upvotes · 0 comments - [Intel Graphics Driver Preps For UHBR DP Tunnels With Linux 7.1](https://daily.dev/posts/intel-graphics-driver-preps-for-uhbr-dp-tunnels-with-linux-7-1-jnnsonksg) · Phoronix · 0 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux), [#hardware](https://daily.dev/tags/hardware), [#embedded](https://daily.dev/tags/embedded) [View this post on daily.dev](https://daily.dev/posts/i3c-hub-hdr-ddr-support-merged-for-linux-7-4-dq3kezitd) ```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":"I3C Hub \u0026 HDR-DDR Support Merged For Linux 7.4","url":"https://daily.dev/posts/i3c-hub-hdr-ddr-support-merged-for-linux-7-4-dq3kezitd","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/i3c-hub-hdr-ddr-support-merged-for-linux-7-4-dq3kezitd"},"datePublished":"2026-10-30T10:03:58.304Z","dateModified":"2026-10-30T10:05:55.129Z","description":"Linux 7.4 merges I3C hub support and HDR-DDR fixes for the MIPI I3C subsystem. 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