From 50b55fd463ce565b768d8bc214dd0280bee8b10d Mon Sep 17 00:00:00 2001
From: Keyon Jie <yang.jie@linux.intel.com>
Date: Fri, 4 Sep 2020 16:27:33 +0300
Subject: [PATCH] ASoC: SOF: use the sof_ipc_comp reserved bytes for extended data
Git-commit: 50b55fd463ce565b768d8bc214dd0280bee8b10d
Patch-mainline: v5.10-rc1
References: jsc#SLE-16518
Use the 32bit reserved member of the struct sof_ipc_comp as the extended
data length, this will help to minimize the ABI change for adding new
extended data to the struct sof_ipc_comp, usually only minor ABI version
bump needed for every update with this new solution.
Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200904132744.1699575-6-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
include/sound/sof/topology.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/sound/sof/topology.h b/include/sound/sof/topology.h
index 796b6c8e851d..d12736e14b69 100644
--- a/include/sound/sof/topology.h
+++ b/include/sound/sof/topology.h
@@ -57,8 +57,8 @@ struct sof_ipc_comp {
uint32_t pipeline_id;
uint32_t core;
- /* reserved for future use */
- uint32_t reserved[1];
+ /* extended data length, 0 if no extended data */
+ uint32_t ext_data_length;
} __packed;
/*
--
2.16.4