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Both DVC/MIX have Volume Ramp Control. This patch supprts MIX Volume Ramp. One note is that main purpose of MIX Volume Ramp is to reduce noise, thus, MIX Ramp range is very few if you compare to DVC Volume Ramp (DVC = 5bit, MIX = 4bit). You can use MIX Volume Ranp like below amixer set "MIX Ramp Up Rate" "0.125 dB/1 step" amixer set "MIX Ramp Down Rate" "0.125 dB/1 step" amixer set "MIX Ramp" on aplay xxx.wav & amixer set "MIX",0 80% // DAI0 Volume Down amixer set "MIX",1 100% // DAI1 Volume Up Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com> Signed-off-by: Mark Brown <broonie@kernel.org> |
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| README | ||
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.