diff options
Diffstat (limited to 'sound/soc/xilinx/xilinx-dp-card.c')
| -rw-r--r-- | sound/soc/xilinx/xilinx-dp-card.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/sound/soc/xilinx/xilinx-dp-card.c b/sound/soc/xilinx/xilinx-dp-card.c new file mode 100644 index 000000000000..f216b40c647d --- /dev/null +++ b/sound/soc/xilinx/xilinx-dp-card.c @@ -0,0 +1,118 @@ +/* + * Xilinx DisplayPort SoC Sound Card support + * + * Copyright (C) 2015 Xilinx, Inc. + * + * Author: Hyun Woo Kwon <hyunk@xilinx.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +#include <sound/soc.h> + +static int xilinx_dp_startup(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + + snd_pcm_hw_constraint_step(runtime, 0, + SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 256); + return 0; +} + +static const struct snd_soc_ops xilinx_dp_ops = { + .startup = xilinx_dp_startup, +}; + +SND_SOC_DAILINK_DEFS(pcm, + DAILINK_COMP_ARRAY(COMP_EMPTY()), + DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "xilinx-dp-snd-codec-dai")), + DAILINK_COMP_ARRAY(COMP_EMPTY())); + +static struct snd_soc_dai_link xilinx_dp_dai_links[] = { + { + .name = "xilinx-dp0", + .stream_name = "xilinx-dp0", + .ops = &xilinx_dp_ops, + SND_SOC_DAILINK_REG(pcm), + }, + { + .name = "xilinx-dp1", + .stream_name = "xilinx-dp1", + .ops = &xilinx_dp_ops, + SND_SOC_DAILINK_REG(pcm), + }, + +}; + +static struct snd_soc_card xilinx_dp_card = { + .name = "DisplayPort monitor", + .owner = THIS_MODULE, + .dai_link = xilinx_dp_dai_links, + .num_links = 2, +}; + +static int xilinx_dp_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &xilinx_dp_card; + struct device_node *node = pdev->dev.of_node; + struct device_node *codec, *pcm; + int ret; + + card->dev = &pdev->dev; + + codec = of_parse_phandle(node, "xlnx,dp-snd-codec", 0); + if (!codec) + return -ENODEV; + + pcm = of_parse_phandle(node, "xlnx,dp-snd-pcm", 0); + if (!pcm) + return -ENODEV; + xilinx_dp_dai_links[0].platforms->of_node = pcm; + xilinx_dp_dai_links[0].cpus->of_node = codec; + xilinx_dp_dai_links[0].codecs->of_node = codec; + + pcm = of_parse_phandle(node, "xlnx,dp-snd-pcm", 1); + if (!pcm) + return -ENODEV; + xilinx_dp_dai_links[1].platforms->of_node = pcm; + xilinx_dp_dai_links[1].cpus->of_node = codec; + xilinx_dp_dai_links[1].codecs->of_node = codec; + + ret = devm_snd_soc_register_card(&pdev->dev, card); + if (ret) + return ret; + + dev_info(&pdev->dev, "Xilinx DisplayPort Sound Card probed\n"); + + return 0; +} + +static const struct of_device_id xilinx_dp_of_match[] = { + { .compatible = "xlnx,dp-snd-card", }, + {}, +}; +MODULE_DEVICE_TABLE(of, xilinx_dp_of_match); + +static struct platform_driver xilinx_dp_aud_driver = { + .driver = { + .name = "xilinx-dp-snd-card", + .of_match_table = xilinx_dp_of_match, + .pm = &snd_soc_pm_ops, + }, + .probe = xilinx_dp_probe, +}; +module_platform_driver(xilinx_dp_aud_driver); + +MODULE_DESCRIPTION("Xilinx DisplayPort Sound Card module"); +MODULE_LICENSE("GPL v2"); |