On Wed, Sep 18, 2019 at 08:33:50AM -0500, Pierre-Louis Bossart wrote: > On 9/18/19 5:48 AM, Mark Brown wrote: > > In DSP modes only one edge really matters anyway so it's not super > > important how long the pulse is. > There are exceptions to the rule. > In the early days of SOF, we had to provide support for amplifiers that did > require a pulse larger than a bit. In the SOF IPC we added an > 'frame_pulse_width' field to pass the configuration all the way from > topology to the firmware and Intel SSP driver. > The other quirk we added is the ability to control zero-padding per slot > instead of at the end of the frame, e.g. 1 bit of padding after 24 bits when > using 4 slots w/ 25 bits in a 100-bit frame. Neither of those is part of the core DSP mode definition though in the same way that constraints like MCLK or BCLK ratios aren't. They're modifiers on top.
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