This patch updates driver_usage.txt file to reflect the latest changes
that this patch set introduces.
Signed-off-by: Christian Gromm <christian.gr...@microchip.com>
---
v2:
nothing
v3:
nothing
v4:
nothing
drivers/staging/most/Documentation/driver_usage.txt | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/most/Documentation/driver_usage.txt
b/drivers/staging/most/Documentation/driver_usage.txt
index bb9b4e8..da7a8f4 100644
--- a/drivers/staging/most/Documentation/driver_usage.txt
+++ b/drivers/staging/most/Documentation/driver_usage.txt
@@ -142,8 +142,9 @@ Cdev component example:
Sound component example:
-The sound component needs an additional parameter to determine the audio
-resolution that is going to be used. The following formats are available:
+The sound component needs additional parameters to determine the audio
+resolution that is going to be used and to trigger the registration of a
+sound card with ALSA. The following audio formats are available:
- "1x8" (Mono)
- "2x16" (16-bit stereo)
@@ -151,9 +152,18 @@ resolution that is going to be used. The following formats
are available:
- "2x32" (32-bit stereo)
- "6x16" (16-bit surround 5.1)
- $ echo "mdev0:ep_81:sound:most51_playback.6x16" >$(DRV_DIR)/add_link
+To make the sound module create a sound card and register it with ALSA the
+string "create" needs to be attached to the module parameter section of the
+configuration string. To create a sound card with with two playback devices
+(linked to channel ep01 and ep02) and one capture device (linked to channel
+ep83) the following is written to the add_link file:
+ $ echo "mdev0:ep01:sound:most51_playback.6x16" >$(DRV_DIR)/add_link
+ $ echo "mdev0:ep02:sound:most_playback.2x16" >$(DRV_DIR)/add_link
+ $ echo "mdev0:ep83:sound:most_capture.2x16.create" >$(DRV_DIR)/add_link
+The link names (most51_playback, most_playback and most_capture) will
+become the names of the PCM devices of the sound card.
Section 2.3 USB Padding
--
2.7.4
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