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Diffstat (limited to 'sound/soc/fsl/imx-cdnhdmi.c')
-rw-r--r--sound/soc/fsl/imx-cdnhdmi.c538
1 files changed, 538 insertions, 0 deletions
diff --git a/sound/soc/fsl/imx-cdnhdmi.c b/sound/soc/fsl/imx-cdnhdmi.c
new file mode 100644
index 000000000000..9b6b1f0b4b38
--- /dev/null
+++ b/sound/soc/fsl/imx-cdnhdmi.c
@@ -0,0 +1,538 @@
+/*
+ * Copyright 2017-2018 NXP
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <sound/hdmi-codec.h>
+#include "../../../drivers/gpu/drm/imx/hdp/imx-hdp.h"
+
+#define SUPPORT_RATE_NUM 10
+#define SUPPORT_CHANNEL_NUM 10
+
+struct imx_cdnhdmi_data {
+ struct snd_soc_dai_link dai;
+ struct snd_soc_card card;
+ int protocol;
+ u32 support_rates[SUPPORT_RATE_NUM];
+ u32 support_rates_num;
+ u32 support_channels[SUPPORT_CHANNEL_NUM];
+ u32 support_channels_num;
+ u32 edid_rates[SUPPORT_RATE_NUM];
+ u32 edid_rates_count;
+ u32 edid_channels[SUPPORT_CHANNEL_NUM];
+ u32 edid_channels_count;
+ uint8_t eld[MAX_ELD_BYTES];
+};
+
+static int imx_cdnhdmi_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_card *card = rtd->card;
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+ static struct snd_pcm_hw_constraint_list constraint_rates;
+ static struct snd_pcm_hw_constraint_list constraint_channels;
+ int ret;
+
+ constraint_rates.list = data->support_rates;
+ constraint_rates.count = data->support_rates_num;
+
+ ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ &constraint_rates);
+ if (ret)
+ return ret;
+
+ constraint_channels.list = data->support_channels;
+ constraint_channels.count = data->support_channels_num;
+
+ ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &constraint_channels);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int imx_cdnhdmi_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_card *card = rtd->card;
+ struct device *dev = card->dev;
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ int ret;
+
+ /* set cpu DAI configuration */
+ if (tx)
+ ret = snd_soc_dai_set_fmt(cpu_dai,
+ SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS);
+ else
+ ret = snd_soc_dai_set_fmt(cpu_dai,
+ SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM);
+
+ if (ret) {
+ dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN);
+ if (ret) {
+ dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, 32);
+ if (ret) {
+ dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct snd_soc_ops imx_cdnhdmi_ops = {
+ .startup = imx_cdnhdmi_startup,
+ .hw_params = imx_cdnhdmi_hw_params,
+};
+
+static const unsigned int eld_rates[] = {
+ 32000,
+ 44100,
+ 48000,
+ 88200,
+ 96000,
+ 176400,
+ 192000,
+};
+
+static unsigned int sad_max_channels(const u8 *sad)
+{
+ return 1 + (sad[0] & 7);
+}
+
+static int get_edid_info(struct snd_soc_card *card)
+{
+ struct snd_soc_pcm_runtime *rtd = list_first_entry(
+ &card->rtd_list, struct snd_soc_pcm_runtime, list);
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct hdmi_codec_pdata *hcd = codec->dev->platform_data;
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+ int i, j, ret;
+ const u8 *sad;
+ unsigned int channel_max = 0;
+ unsigned int rate_mask = 0;
+ unsigned int rate_mask_eld = 0;
+
+ ret = hcd->ops->get_eld(codec->dev->parent, hcd->data,
+ data->eld, sizeof(data->eld));
+ sad = drm_eld_sad(data->eld);
+ if (sad) {
+ for (j = 0; j < data->support_rates_num; j++) {
+ for (i = 0; i < ARRAY_SIZE(eld_rates); i++)
+ if (eld_rates[i] == data->support_rates[j])
+ rate_mask |= BIT(i);
+ }
+
+ for (i = drm_eld_sad_count(data->eld); i > 0; i--, sad += 3) {
+ if (rate_mask & sad[1])
+ channel_max = max(channel_max, sad_max_channels(sad));
+
+ if (sad_max_channels(sad) >= 2)
+ rate_mask_eld |= sad[1];
+ }
+ }
+
+ rate_mask = rate_mask & rate_mask_eld;
+
+ data->edid_rates_count = 0;
+ data->edid_channels_count = 0;
+
+ for (i = 0; i < ARRAY_SIZE(eld_rates); i++) {
+ if (rate_mask & BIT(i)) {
+ data->edid_rates[data->edid_rates_count] = eld_rates[i];
+ data->edid_rates_count++;
+ }
+ }
+
+ for (i = 0; i < data->support_channels_num; i++) {
+ if (data->support_channels[i] <= channel_max) {
+ data->edid_channels[data->edid_channels_count]
+ = data->support_channels[i];
+ data->edid_channels_count++;
+ }
+ }
+
+ return 0;
+}
+
+static int imx_cdnhdmi_channels_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+
+ get_edid_info(card);
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = data->edid_channels_count;
+
+ return 0;
+}
+
+static int imx_cdnhdmi_channels_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+ int i;
+
+ get_edid_info(card);
+
+ for (i = 0 ; i < data->edid_channels_count ; i++)
+ uvalue->value.integer.value[i] = data->edid_channels[i];
+
+ return 0;
+}
+
+static int imx_cdnhdmi_rates_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+
+ get_edid_info(card);
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = data->edid_rates_count;
+
+ return 0;
+}
+
+static int imx_cdnhdmi_rates_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+ int i;
+
+ get_edid_info(card);
+
+ for (i = 0 ; i < data->edid_rates_count; i++)
+ uvalue->value.integer.value[i] = data->edid_rates[i];
+
+ return 0;
+}
+
+static int imx_cdnhdmi_formats_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 3;
+
+ return 0;
+}
+
+static int imx_cdnhdmi_formats_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ uvalue->value.integer.value[0] = 16;
+ uvalue->value.integer.value[1] = 24;
+ uvalue->value.integer.value[2] = 32;
+
+ return 0;
+}
+
+static int get_edid_rx_info(struct snd_soc_card *card)
+{
+ struct snd_soc_pcm_runtime *rtd = list_first_entry(
+ &card->rtd_list, struct snd_soc_pcm_runtime, list);
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct hdmi_codec_pdata *hcd = codec->dev->platform_data;
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ ret = hcd->ops->get_eld(codec->dev->parent, hcd->data,
+ data->eld, sizeof(data->eld));
+
+ if (ret)
+ return -EINVAL;
+
+ data->edid_rates[0] = data->eld[0] +
+ (data->eld[1] << 8) +
+ (data->eld[2] << 16) +
+ (data->eld[3] << 24);
+
+ data->edid_channels[0] = data->eld[4] +
+ (data->eld[5] << 8) +
+ (data->eld[6] << 16) +
+ (data->eld[7] << 24);
+
+
+ return 0;
+}
+
+static int imx_cdnhdmi_rx_channels_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 2;
+ uinfo->value.integer.max = 8;
+
+ return 0;
+}
+
+static int imx_cdnhdmi_rx_channels_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ ret = get_edid_rx_info(card);
+ if (ret)
+ return ret;
+ uvalue->value.integer.value[0] = data->edid_channels[0];
+
+ return 0;
+}
+
+static int imx_cdnhdmi_rx_rates_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 16000;
+ uinfo->value.integer.max = 192000;
+
+ return 0;
+}
+
+static int imx_cdnhdmi_rx_rates_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
+ struct imx_cdnhdmi_data *data = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ ret = get_edid_rx_info(card);
+ if (ret)
+ return ret;
+
+ uvalue->value.integer.value[0] = data->edid_rates[0];
+
+ return 0;
+}
+
+static struct snd_kcontrol_new imx_cdnhdmi_ctrls[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Support Channels",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = imx_cdnhdmi_channels_info,
+ .get = imx_cdnhdmi_channels_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Support Rates",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = imx_cdnhdmi_rates_info,
+ .get = imx_cdnhdmi_rates_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Support Formats",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = imx_cdnhdmi_formats_info,
+ .get = imx_cdnhdmi_formats_get,
+ },
+};
+
+static struct snd_kcontrol_new imx_cdnhdmi_rx_ctrls[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Rx Channels",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = imx_cdnhdmi_rx_channels_info,
+ .get = imx_cdnhdmi_rx_channels_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "HDMI Rx Rates",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = imx_cdnhdmi_rx_rates_info,
+ .get = imx_cdnhdmi_rx_rates_get,
+ },
+};
+
+static int imx_cdnhdmi_probe(struct platform_device *pdev)
+{
+ struct device_node *cpu_np, *cdnhdmi_np = NULL;
+ struct platform_device *cpu_pdev;
+ struct imx_cdnhdmi_data *data;
+ int ret;
+ int i;
+
+ cpu_np = of_parse_phandle(pdev->dev.of_node, "audio-cpu", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ cpu_pdev = of_find_device_by_node(cpu_np);
+ if (!cpu_pdev) {
+ dev_err(&pdev->dev, "failed to find SAI platform device\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ for (i = 0; i < SUPPORT_RATE_NUM; i++) {
+ ret = of_property_read_u32_index(pdev->dev.of_node,
+ "constraint-rate",
+ i, &data->support_rates[i]);
+ if (!ret)
+ data->support_rates_num = i + 1;
+ else
+ break;
+ }
+
+ if (data->support_rates_num == 0) {
+ data->support_rates[0] = 48000;
+ data->support_rates[1] = 96000;
+ data->support_rates[2] = 32000;
+ data->support_rates[3] = 192000;
+ data->support_rates_num = 4;
+ }
+
+ data->support_channels[0] = 2;
+ data->support_channels[1] = 4;
+ data->support_channels[2] = 8;
+ data->support_channels_num = 3;
+
+ of_property_read_u32(pdev->dev.of_node, "protocol",
+ &data->protocol);
+
+ data->dai.name = "imx8 hdmi";
+ data->dai.stream_name = "imx8 hdmi";
+ data->dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
+ data->dai.platform_of_node = cpu_np;
+ data->dai.ops = &imx_cdnhdmi_ops;
+ data->dai.playback_only = true;
+ data->dai.capture_only = false;
+ data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS;
+
+ if (of_property_read_bool(pdev->dev.of_node, "hdmi-out")) {
+ data->dai.playback_only = true;
+ data->dai.capture_only = false;
+ data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS;
+ data->dai.codec_dai_name = "hdmi-hifi.0";
+ data->dai.codec_name = "hdmi-audio-codec.1";
+ data->card.controls = imx_cdnhdmi_ctrls;
+ data->card.num_controls = ARRAY_SIZE(imx_cdnhdmi_ctrls);
+ }
+
+ if (of_property_read_bool(pdev->dev.of_node, "hdmi-in")) {
+ data->dai.playback_only = false;
+ data->dai.capture_only = true;
+ data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM;
+ data->dai.codec_dai_name = "hdmi-hifi.0";
+ data->dai.codec_name = "hdmi-audio-codec.2";
+ data->card.controls = imx_cdnhdmi_rx_ctrls;
+ data->card.num_controls = ARRAY_SIZE(imx_cdnhdmi_rx_ctrls);
+ }
+
+ if ((data->dai.playback_only && data->dai.capture_only)
+ || (!data->dai.playback_only && !data->dai.capture_only)) {
+ dev_err(&pdev->dev, "Wrongly enable HDMI DAI link\n");
+ goto fail;
+ }
+
+ data->card.dev = &pdev->dev;
+ data->card.owner = THIS_MODULE;
+ ret = snd_soc_of_parse_card_name(&data->card, "model");
+ if (ret)
+ goto fail;
+ data->card.num_links = 1;
+ data->card.dai_link = &data->dai;
+
+
+ platform_set_drvdata(pdev, &data->card);
+ snd_soc_card_set_drvdata(&data->card, data);
+ ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
+ if (ret) {
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+ goto fail;
+ }
+
+fail:
+ if (cpu_np)
+ of_node_put(cpu_np);
+ if (cdnhdmi_np)
+ of_node_put(cdnhdmi_np);
+ return ret;
+}
+
+static const struct of_device_id imx_cdnhdmi_dt_ids[] = {
+ { .compatible = "fsl,imx-audio-cdnhdmi", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_cdnhdmi_dt_ids);
+
+static struct platform_driver imx_cdnhdmi_driver = {
+ .driver = {
+ .name = "imx-cdnhdmi",
+ .owner = THIS_MODULE,
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = imx_cdnhdmi_dt_ids,
+ },
+ .probe = imx_cdnhdmi_probe,
+};
+module_platform_driver(imx_cdnhdmi_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-cdnhdmi");
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-03 08:54:38 +0000