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ASoC: SOF: Intel: hda-mlink: fix off-by-one error

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[ Upstream commit 7075b0c91b ]

The HCHAN parameter should be the highest channel number, not the
channel count.

While we're at it, handle LCHAN with the dual __ffs helper.

Fixes: ccc2f0c1b6 ("ASoC: SOF: Intel: hda-mlink: add helper to program SoundWire PCMSyCM registers")
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20230807210959.506849-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2023-08-07 16:09:40 -05:00 committed by Greg Kroah-Hartman
parent 9064662f15
commit d4aa235496
1 changed files with 11 additions and 1 deletions
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12
sound/soc/sof/intel/hda-mlink.c
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@ -781,6 +781,8 @@ int hdac_bus_eml_sdw_map_stream_ch(struct hdac_bus *bus, int sublink, int y,
{
struct hdac_ext2_link *h2link;
u16 __iomem *pcmsycm;
int hchan;
int lchan;
u16 val;
h2link = find_ext2_link(bus, true, AZX_REG_ML_LEPTR_ID_SDW);
@ -791,9 +793,17 @@ int hdac_bus_eml_sdw_map_stream_ch(struct hdac_bus *bus, int sublink, int y,
h2link->instance_offset * sublink +
AZX_REG_SDW_SHIM_PCMSyCM(y);
if (channel_mask) {
hchan = __fls(channel_mask);
lchan = __ffs(channel_mask);
} else {
hchan = 0;
lchan = 0;
}
mutex_lock(&h2link->eml_lock);
hdaml_shim_map_stream_ch(pcmsycm, 0, hweight32(channel_mask),
hdaml_shim_map_stream_ch(pcmsycm, lchan, hchan,
stream_id, dir);
mutex_unlock(&h2link->eml_lock);