diff --git a/alsaaudio.c b/alsaaudio.c
index 017e0fb..3087136 100644
--- a/alsaaudio.c
+++ b/alsaaudio.c
@@ -203,6 +203,12 @@ static bool is_value_volume_unit(long unit)
 	return false;
 }
 
+const char * const alsacard_list_doc = R"(.. function:: cards() -> list[str]
+
+   List the available ALSA cards by name. This function is only moderately
+   useful. If you want to see a list of available PCM devices, use :func:`pcms`
+   instead.)";
+
 static PyObject *
 alsacard_list(PyObject *self, PyObject *args)
 {
@@ -3079,7 +3085,7 @@ static PyTypeObject ALSAMixerType = {
 static PyMethodDef alsaaudio_methods[] = {
 	{ "card_indexes", (PyCFunction)alsacard_list_indexes, METH_VARARGS},
 	{ "card_name", (PyCFunction)alsacard_name, METH_VARARGS},
-	{ "cards", (PyCFunction)alsacard_list, METH_VARARGS},
+	{ "cards", (PyCFunction)alsacard_list, METH_VARARGS, alsacard_list_doc },
 	{ "pcms", (PyCFunction)alsapcm_list, METH_VARARGS|METH_KEYWORDS},
 	{ "mixers", (PyCFunction)alsamixer_list, METH_VARARGS|METH_KEYWORDS},
 	{ 0, 0 },
diff --git a/doc/conf.py b/doc/conf.py
index 7212540..20b7a9a 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -34,7 +34,9 @@ from setup import pyalsa_version
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = []
+extensions = ['autoapi.extension']
+
+autoapi_dirs = ['..']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
diff --git a/doc/libalsaaudio.rst b/doc/libalsaaudio.rst
index e7dacb9..f4c0c3e 100644
--- a/doc/libalsaaudio.rst
+++ b/doc/libalsaaudio.rst
@@ -34,12 +34,6 @@ The :mod:`alsaaudio` module defines functions and classes for using ALSA.
 
    *New in 0.8*
 
-.. function:: cards() -> list[str]
-
-   List the available ALSA cards by name. This function is only moderately
-   useful. If you want to see a list of available PCM devices, use :func:`pcms`
-   instead.
-
 ..
    Omitted by intention due to being superseded by cards():