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[ Upstream commit e9df1755485dd90a89656e8a21ec4d71c909fa30 ] The vendor Comtrue Inc. (0x2fc6) produces USB audio chipsets like the CT7601 which are capable of Native DSD playback. This patch adds QUIRK_FLAG_DSD_RAW for Comtrue (VID 0x2fc6), which enables native DSD playback (DSD_U32_LE) on their USB Audio device. This has been verified under Ubuntu 25.04 with JRiver. Signed-off-by: noble.yang <noble.yang@comtrue-inc.com> Link: https://patch.msgid.link/20250731110614.4070-1-noble228@gmail.com Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.