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misc: rp1-pio: two small fixes and support for cyclic output DMA - #7663

Merged

pelwell merged 8 commits into

raspberrypi:rpi-6.18.yfrom

hansverkuil:rp1-pio-tx

Oct 8, 2026

Commits on Oct 8, 2026
- misc: rp1-pio: name the DMA direction with a tx bool
  Hans Verkuil
  committed
  77df9ad
- misc: rp1-pio: guard against unreasonable buffer allocations
  Hans Verkuil
  committed
  35f081c
- misc: rp1-pio: ensure >= 2 buffers are available for cyclic DMA
  Hans Verkuil
  committed
  9cff240
- misc: rp1-pio: add RP1_PIO_CYCLIC_MIN_BUF_SIZE
  Hans Verkuil
  committed
  deb325b
- misc: rp1-pio: buf_size was overwritten, which was confusing
  Hans Verkuil
  committed
  c8910fb
- misc: rp1-pio: better handling of corner cases
  Hans Verkuil
  committed
  8216401
- misc: rp1-pio: split off cyclic part of rp1_pio_sm_rx_user
  Hans Verkuil
  committed
  f71356f
- misc: rp1-pio: add cyclic TX DMA support
  Hans Verkuil
  committed
  8297931