The global STATESTS register will provide information on all
links. Rather than iterate on all possible links, the helpers only
filters the range of possible bits for a quick lookup. The
process_wakeen() helper will walk through all the links and deal with
wakes.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
---
sound/soc/sof/intel/lnl.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/sound/soc/sof/intel/lnl.c b/sound/soc/sof/intel/lnl.c
index 95da0c626832..c3ee507e2e21 100644
--- a/sound/soc/sof/intel/lnl.c
+++ b/sound/soc/sof/intel/lnl.c
@@ -205,6 +205,23 @@ static int lnl_dsp_disable_interrupts(struct snd_sof_dev *sdev)
return mtl_enable_interrupts(sdev, false);
}
+static bool lnl_sdw_check_wakeen_irq(struct snd_sof_dev *sdev)
+{
+ struct hdac_bus *bus = sof_to_bus(sdev);
+ u16 wake_sts;
+
+ /*
+ * we need to use the global HDaudio WAKEEN/STS to be able to
+ * detect wakes in low-power modes. The link-specific information
+ * is handled in the process_wakeen() helper, this helper only
+ * detects a SoundWire wake without identifying the link.
+ */
+ wake_sts = snd_hdac_chip_readw(bus, STATESTS);
+
+ /* filter out the range of SDIs that can be set for SoundWire */
+ return wake_sts & GENMASK(SDW_MAX_DEVICES, SDW_INTEL_DEV_NUM_IDA_MIN);
+}
+
const struct sof_intel_dsp_desc lnl_chip_info = {
.cores_num = 5,
.init_core_mask = BIT(0),
@@ -221,6 +238,7 @@ const struct sof_intel_dsp_desc lnl_chip_info = {
.read_sdw_lcount = hda_sdw_check_lcount_ext,
.enable_sdw_irq = lnl_enable_sdw_irq,
.check_sdw_irq = lnl_dsp_check_sdw_irq,
+ .check_sdw_wakeen_irq = lnl_sdw_check_wakeen_irq,
.check_ipc_irq = mtl_dsp_check_ipc_irq,
.cl_init = mtl_dsp_cl_init,
.power_down_dsp = mtl_power_down_dsp,
--
2.40.1
