linux-kernel - [PATCH] docs: sound: describe 'chan_map' member in snd_dec

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Message-Id: <20250926162658.989479-1-kriish.sharma2006@gmail.com>
Date: Fri, 26 Sep 2025 16:26:58 +0000
From: Kriish Sharma <kriish.sharma2006@...il.com>
To: Vinod Koul <vkoul@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>
Cc: linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Kriish Sharma <kriish.sharma2006@...il.com>
Subject: [PATCH] docs: sound: describe 'chan_map' member in snd_dec_opus

When building kernel docs, the following warning appeared:

  WARNING: ./include/uapi/sound/compress_params.h:364 struct member 'chan_map' not described in 'snd_dec_opus'

The inline struct 'snd_dec_opus_ch_map' inside 'snd_dec_opus' was not properly documented.
This patch documents the 'chan_map' member and its fields (stream_count, coupled_count, channel_map), resolving the warning.

Signed-off-by: Kriish Sharma <kriish.sharma2006@...il.com>
---
 include/uapi/sound/compress_params.h | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/include/uapi/sound/compress_params.h b/include/uapi/sound/compress_params.h
index faf4fa911f7f..e90e2f40732a 100644
--- a/include/uapi/sound/compress_params.h
+++ b/include/uapi/sound/compress_params.h
@@ -336,16 +336,14 @@ struct snd_dec_ape {
  * @mapping_family: Order and meaning of output channels. Only values 0 and 1
  * are expected; values 2..255 are not recommended for playback.
  *
- * Optional channel mapping table. Describes mapping of opus streams to decoded
- * channels.
- * @struct snd_dec_opus_ch_map
- *	@stream_count: Number of streams encoded in each Ogg packet.
- *	@coupled_count: Number of streams whose decoders are used for two
- *		channels.
- *	@channel_map: describes which decoded channel to be used for each one.
- *		See RFC doc for details.
- *		This supports only mapping families 0 and 1, therefore max
- *		number of channels is 8.
+ * @chan_map: Optional channel mapping table. Describes mapping of opus streams
+ *            to decoded channels. Fields:
+ *              - @stream_count: Number of streams encoded in each Ogg packet.
+ *              - @coupled_count: Number of streams whose decoders are used
+ *                                for two channels.
+ *              - @channel_map: Which decoded channel to be used for each one.
+ *                              Supports only mapping families 0 and 1,
+ *                              max number of channels is 8.
  *
  * These options were extracted from RFC7845 Section 5.
  */
-- 
2.34.1