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As of kernel 4.10, ALSA dice driver is expected to be used in default speed. In most cases, it's S400. While, IEEE 1394 specification describes the other speed such as S800. According to 'TCD30XX User Guide', its link layer controller supports several transmission speed up to S800[0]. In Dice software interface, transmission speed in output direction can be configured by asynchronous transaction to 'TX_SPEED' offset in its address space. S800 may be available. This commit improves configuration of transmission unit before starting packet streaming for this purpose. The value of 'max_speed' in 'fw_device' data structure has available maximum speed decided in bus arbitration, thus it's within capacity of the unit. [0] TCD3xx User Guide - TCAT 1394 LLC, Revision 0.9.0-41360 (TC Applied Technologies, May 6 2015) http://www.tctechnologies.tc/index.php/support/support-hardware/dice-iii-detailed-documentation Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.