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WS2812: Support more than 7 pins in parallel mode #455

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Commits on Dec 31, 2023

  1. WS2812: Support more than 5 pins in parallel mode

    ws2812_parallel_program_init() contained an unneeded call to
    sm_config_set_set_pins(). When this is called with the pin_count
    parameter set to a value larger than 5, the set pin count value in the
    pinctrl register overflows into the side-set pin count. This can result
    in hard to diagnose issues where low numbered GPIO pins don't work as
    expected.
    
    There is an existing valid_params_if() check in sm_config_set_set_pins()
    which would catch this error but it is ignored in Release builds.
    
    This commit just removes this sm_config_set_set_pins() call as SET
    commands aren't even used by the associated PIO code.
    
    Discovered when trying to explain symptoms noted in this forum thread:
    https://forums.raspberrypi.com/viewtopic.php?t=362071
    adamgreen committed Dec 31, 2023
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