On 09/06/2021 08:13, Srinivasa Rao Mandadapu wrote:
Add four speaker support on MI2S secondary block
by using I2S SD1 line on gpio52 pin, and add channel map
control support in the lpass-cpu audio driver.
Signed-off-by: Srinivasa Rao Mandadapu <srivasam@xxxxxxxxxxxxxx>
---
Changes Since V1:
-- removed set_channel_map/get_channel_map implementation as default kcontrols
added in pcm_new API.
sound/soc/qcom/lpass-cpu.c | 32 ++++++++++++++++++++++++++++++++
sound/soc/qcom/lpass-sc7180.c | 1 +
sound/soc/qcom/lpass.h | 2 ++
3 files changed, 35 insertions(+)
diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index c62d2612e8f5..15d69e311b38 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -29,6 +29,14 @@
#define LPASS_CPU_I2S_SD0_1_2_MASK GENMASK(2, 0)
#define LPASS_CPU_I2S_SD0_1_2_3_MASK GENMASK(3, 0)
+/*
+ * Channel maps for Quad channel playbacks on MI2S Secondary
+ */
+static struct snd_pcm_chmap_elem lpass_quad_chmaps = {
+ .channels = 4,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_RL,
+ SNDRV_CHMAP_FR, SNDRV_CHMAP_RR }
AFAIU, You would need an empty entry at the end of this list if not we
will endup in a dereferencing memory sitting right next to this array
which will lead to random memory corruptions...
Have a look at some of the examples in existing codec drivers.
Other than that patch looks good.
--srini
+};
static int lpass_cpu_init_i2sctl_bitfields(struct device *dev,
struct lpaif_i2sctl *i2sctl, struct regmap *map)
{
@@ -324,6 +332,25 @@ const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops = {
};
EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_ops);
+int lpass_cpu_pcm_new(struct snd_soc_pcm_runtime *rtd,
+ struct snd_soc_dai *dai)
+{
+ int ret;
+ struct snd_soc_dai_driver *drv = dai->driver;
+ struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
+
+ if (drvdata->mi2s_playback_sd_mode[dai->id] == LPAIF_I2SCTL_MODE_QUAD01) {
+ ret = snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &lpass_quad_chmaps, drv->playback.channels_max, 0,
+ NULL);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lpass_cpu_pcm_new);
+
int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai)
{
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
@@ -856,6 +883,11 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
PTR_ERR(drvdata->mi2s_bit_clk[dai_id]));
return PTR_ERR(drvdata->mi2s_bit_clk[dai_id]);
}
+ if (drvdata->mi2s_playback_sd_mode[dai_id] ==
+ LPAIF_I2SCTL_MODE_QUAD01) {
+ variant->dai_driver[dai_id].playback.channels_min = 4;
+ variant->dai_driver[dai_id].playback.channels_max = 4;
+ }
}
/* Allocation for i2sctl regmap fields */
diff --git a/sound/soc/qcom/lpass-sc7180.c b/sound/soc/qcom/lpass-sc7180.c
index 8c168d3c589e..77a556b27cf0 100644
--- a/sound/soc/qcom/lpass-sc7180.c
+++ b/sound/soc/qcom/lpass-sc7180.c
@@ -58,6 +58,7 @@ static struct snd_soc_dai_driver sc7180_lpass_cpu_dai_driver[] = {
},
.probe = &asoc_qcom_lpass_cpu_dai_probe,
.ops = &asoc_qcom_lpass_cpu_dai_ops,
+ .pcm_new = lpass_cpu_pcm_new,
}, {
.id = LPASS_DP_RX,
.name = "Hdmi",
diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h
index 83b2e08ade06..623ddccdafff 100644
--- a/sound/soc/qcom/lpass.h
+++ b/sound/soc/qcom/lpass.h
@@ -259,5 +259,7 @@ void asoc_qcom_lpass_cpu_platform_shutdown(struct platform_device *pdev);
int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev);
int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai);
extern const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops;
+int lpass_cpu_pcm_new(struct snd_soc_pcm_runtime *rtd,
+ struct snd_soc_dai *dai);
#endif /* __LPASS_H__ */
