MLK-11530-01 ASoC: fsl_hdmi: port hdmi audio driver

cherry-pick below patch from v3.14.y:
ENGR00330403-2: ASoC: fsl_hdmi: port hdmi audio driver from imx_3.10.y

Port HDMI audio driver (CPU driver, machine driver, platform driver) from
imx_3.10.y.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>

During 4.14 rebase converted from snd_pcm_ops.copy to copy_user because
copy was removed by upstream

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
[ Aisheng: fix conflicts for a clean base and merge MLK-12244
file onwership change ]
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>

1 files changed, 114 insertions, 0 deletions

diff --git a/sound/soc/fsl/imx-hdmi.c b/sound/soc/fsl/imx-hdmi.c
new file mode 100644
index 000000000000..a66ea0d6355e
--- /dev/null
+++ b/sound/soc/fsl/imx-hdmi.c
@@ -0,0 +1,114 @@
+/*
+ * ASoC HDMI Transmitter driver for IMX development boards
+ *
+ * Copyright (C) 2011-2016 Freescale Semiconductor, Inc.
+ *
+ * based on stmp3780_devb_hdmi.c
+ *
+ * Vladimir Barinov <vbarinov@embeddedalley.com>
+ *
+ * Copyright 2008 SigmaTel, Inc
+ * Copyright 2008 Embedded Alley Solutions, Inc
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program  is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/mfd/mxc-hdmi-core.h>
+#include <sound/soc.h>
+
+#include "imx-hdmi.h"
+
+/* imx digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link imx_hdmi_dai_link = {
+	.name = "i.MX HDMI Audio Tx",
+	.stream_name = "i.MX HDMI Audio Tx",
+	.codec_dai_name = "hdmi-hifi",
+	.codec_name = "hdmi-audio-codec",
+	.platform_name = "imx-hdmi-audio",
+};
+
+static struct snd_soc_card snd_soc_card_imx_hdmi = {
+	.name = "imx-hdmi-soc",
+	.dai_link = &imx_hdmi_dai_link,
+	.num_links = 1,
+	.owner = THIS_MODULE,
+};
+
+static int imx_hdmi_audio_probe(struct platform_device *pdev)
+{
+	struct device_node *hdmi_np, *np = pdev->dev.of_node;
+	struct snd_soc_card *card = &snd_soc_card_imx_hdmi;
+	struct platform_device *hdmi_pdev;
+	int ret = 0;
+
+	if (!hdmi_get_registered()) {
+		dev_err(&pdev->dev, "initialize HDMI-audio failed. load HDMI-video first!\n");
+		return -ENODEV;
+	}
+
+	hdmi_np = of_parse_phandle(np, "hdmi-controller", 0);
+	if (!hdmi_np) {
+		dev_err(&pdev->dev, "failed to find hdmi-audio cpudai\n");
+		ret = -EINVAL;
+		goto end;
+	}
+
+	hdmi_pdev = of_find_device_by_node(hdmi_np);
+	if (!hdmi_pdev) {
+		dev_err(&pdev->dev, "failed to find SSI platform device\n");
+		ret = -EINVAL;
+		goto end;
+	}
+
+	card->dev = &pdev->dev;
+	card->dai_link->cpu_dai_name = dev_name(&hdmi_pdev->dev);
+
+	platform_set_drvdata(pdev, card);
+
+	ret = snd_soc_register_card(card);
+	if (ret)
+		dev_err(&pdev->dev, "failed to register card: %d\n", ret);
+
+end:
+	if (hdmi_np)
+		of_node_put(hdmi_np);
+
+	return ret;
+}
+
+static int imx_hdmi_audio_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_card(card);
+
+	return 0;
+}
+
+static const struct of_device_id imx_hdmi_dt_ids[] = {
+	{ .compatible = "fsl,imx-audio-hdmi", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
+
+static struct platform_driver imx_hdmi_audio_driver = {
+	.probe = imx_hdmi_audio_probe,
+	.remove = imx_hdmi_audio_remove,
+	.driver = {
+		.of_match_table = imx_hdmi_dt_ids,
+		.name = "imx-audio-hdmi",
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+	},
+};
+
+module_platform_driver(imx_hdmi_audio_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("IMX HDMI TX ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx-audio-hdmi");