[PATCH] ASoC: hdmi-codec: Add RX support

[PATCH] ASoC: hdmi-codec: Add RX support

[Shengjiu Wang]

HDMI interface can also be used as receiver, this patch is to
add such support. The most difference compare with TX is that RX
don't need to get edid information.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 sound/soc/codecs/hdmi-codec.c | 33 ++++++++++++++++++++++++++++-----
 1 file changed, 28 insertions(+), 5 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index e8410b2433de..d5fcc4db8284 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -282,6 +282,7 @@ struct hdmi_codec_priv {
 
 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
 	SND_SOC_DAPM_OUTPUT("TX"),
+	SND_SOC_DAPM_OUTPUT("RX"),
 };
 
 enum {
@@ -389,6 +390,7 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 			      struct snd_soc_dai *dai)
 {
 	struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	int ret = 0;
 
 	mutex_lock(&hcp->lock);
@@ -404,7 +406,7 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 			goto err;
 	}
 
-	if (hcp->hcd.ops->get_eld) {
+	if (tx && hcp->hcd.ops->get_eld) {
 		ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
 					    hcp->eld, sizeof(hcp->eld));
 		if (ret)
@@ -660,14 +662,20 @@ static int hdmi_dai_probe(struct snd_soc_dai *dai)
 {
 	struct snd_soc_dapm_context *dapm;
 	struct hdmi_codec_daifmt *daifmt;
-	struct snd_soc_dapm_route route = {
-		.sink = "TX",
-		.source = dai->driver->playback.stream_name,
+	struct snd_soc_dapm_route route[] = {
+		{
+			.sink = "TX",
+			.source = dai->driver->playback.stream_name,
+		},
+		{
+			.sink = dai->driver->capture.stream_name,
+			.source = "RX",
+		},
 	};
 	int ret;
 
 	dapm = snd_soc_component_get_dapm(dai->component);
-	ret = snd_soc_dapm_add_routes(dapm, &route, 1);
+	ret = snd_soc_dapm_add_routes(dapm, route, 2);
 	if (ret)
 		return ret;
 
@@ -757,6 +765,14 @@ static const struct snd_soc_dai_driver hdmi_i2s_dai = {
 		.formats = I2S_FORMATS,
 		.sig_bits = 24,
 	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,
+		.channels_max = 8,
+		.rates = HDMI_RATES,
+		.formats = I2S_FORMATS,
+		.sig_bits = 24,
+	},
 	.ops = &hdmi_codec_i2s_dai_ops,
 	.pcm_new = hdmi_codec_pcm_new,
 };
@@ -773,6 +789,13 @@ static const struct snd_soc_dai_driver hdmi_spdif_dai = {
 		.rates = HDMI_RATES,
 		.formats = SPDIF_FORMATS,
 	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = HDMI_RATES,
+		.formats = SPDIF_FORMATS,
+	},
 	.ops = &hdmi_codec_spdif_dai_ops,
 	.pcm_new = hdmi_codec_pcm_new,
 };
-- 
2.27.0

Re: [PATCH] ASoC: hdmi-codec: Add RX support

[Mark Brown]

On Thu, 26 Nov 2020 14:36:48 +0800, Shengjiu Wang wrote:
> HDMI interface can also be used as receiver, this patch is to
> add such support. The most difference compare with TX is that RX
> don't need to get edid information.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: hdmi-codec: Add RX support
      commit: 144f836646989783cb018d00fa69f3f8dab58349

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark