From ac0ffc565641d713144bb1ee86df34309b79c8f2 Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@gmail.com>
Date: Thu, 18 Feb 2021 11:43:43 -0600
Subject: [PATCH] _bit_transpose: fix docs

---
 shared-bindings/_bit_transpose/__init__.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/shared-bindings/_bit_transpose/__init__.c b/shared-bindings/_bit_transpose/__init__.c
index 979dff1452..0b9d31fbef 100644
--- a/shared-bindings/_bit_transpose/__init__.c
+++ b/shared-bindings/_bit_transpose/__init__.c
@@ -36,8 +36,13 @@
 //| routine for performing the transformation."""
 //|
 
-//| def bit_transpose(input: _typing.ReadableBuffer, *, output: Optional[_typing.WritableBuffer]=None):
-//|     """Convert a sequence of 8*N pixel values into a single stream of bytes suitable for sending via a parallel conversion method (PioPixl8)
+//| def bit_transpose(input: _typing.ReadableBuffer, *, num_strands:int = 8, output: Optional[_typing.WriteableBuffer]=None) -> WriteableBuffer:
+//|     """Convert a sequence of pixel values into a single stream of bytes suitable for sending via a parallel conversion method (PioPixl8)
+//|
+//|     The number of bytes in the input buffer must be a multiple of the number of strands.
+//|
+//|     If specified output buffer must be big enough for the output, ``len(input) * 8  // num_strands``.  To get a properly sized buffer,
+//|     you can also pass in ``output=None`` once, then re-use the return value in future calls.
 //|
 //|     Returns the output buffer if specified (which must be big enough to hold the result), otherwise a freshly allocated buffer."""
 //|     ...