| Message ID | 20221014102151.108539-5-p.rajanbabu@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/6] ASoC: samsung: i2s: TDM Support for CPU DAI driver | expand |
On 14/10/2022 06:21, Padmanabhan Rajanbabu wrote: > Add a soundcard driver for FSD audio interface to bridge the > CPU DAI of samsung I2S with the codec and platform driver. > Thank you for your patch. There is something to discuss/improve. > + > +#define FSD_PREFIX "tesla," > +#define FSD_DAI_SRC_PCLK 3 > +#define FSD_DAI_RFS_192 192 > +#define FSD_DAI_BFS_48 48 > +#define FSD_DAI_BFS_96 96 > +#define FSD_DAI_BFS_192 192 > + > +struct fsd_card_priv { > + struct snd_soc_card card; > + struct snd_soc_dai_link *dai_link; > + u32 tdm_slots; > + u32 tdm_slot_width; > +}; > + > +static unsigned int fsd_card_get_rfs(unsigned int rate) > +{ > + return FSD_DAI_RFS_192; This wrapper is a bit silly... > +} > + > +static unsigned int fsd_card_get_bfs(unsigned int channels) > +{ > + switch (channels) { > + case 1: > + case 2: > + return FSD_DAI_BFS_48; > + case 3: > + case 4: > + return FSD_DAI_BFS_96; > + case 5: > + case 6: > + case 7: > + case 8: > + return FSD_DAI_BFS_192; > + default: > + return FSD_DAI_BFS_48; > + } > +} > + > +static unsigned int fsd_card_get_psr(unsigned int rate) > +{ > + switch (rate) { > + case 8000: return 43; > + case 11025: return 31; > + case 16000: return 21; > + case 22050: return 16; > + case 32000: return 11; > + case 44100: return 8; > + case 48000: return 7; > + case 64000: return 5; > + case 88200: return 4; > + case 96000: return 4; > + case 192000: return 2; > + default: return 1; > + } > +} > + > +static int fsd_card_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_card *card = rtd->card; > + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); > + struct snd_soc_dai_link *link = rtd->dai_link; > + struct fsd_card_priv *priv = snd_soc_card_get_drvdata(card); > + unsigned int rfs, bfs, psr; > + int ret = 0, cdclk_dir; > + > + rfs = fsd_card_get_rfs(params_rate(params)); > + bfs = fsd_card_get_bfs(params_channels(params)); > + psr = fsd_card_get_psr(params_rate(params)); > + > + /* Configure the Root Clock Source */ > + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK, > + false, FSD_DAI_SRC_PCLK); > + if (ret < 0) { > + dev_err(card->dev, "Failed to set OPCLK: %d\n", ret); > + goto err; > + } > + > + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0, > + false, false); > + if (ret < 0) { > + dev_err(card->dev, "Failed to set RCLKSRC: %d\n", ret); Don't you need to cleanup on error paths? > + goto err; > + } > + > + /* Set CPU DAI configuration */ > + ret = snd_soc_dai_set_fmt(cpu_dai, link->dai_fmt); > + if (ret < 0) { > + dev_err(card->dev, "Failed to set DAIFMT: %d\n", ret); > + goto err; > + } > + > + if (link->dai_fmt & SND_SOC_DAIFMT_CBC_CFC) { > + cdclk_dir = SND_SOC_CLOCK_OUT; > + } else if (link->dai_fmt & SND_SOC_DAIFMT_CBP_CFP) { > + cdclk_dir = SND_SOC_CLOCK_IN; > + } else { > + dev_err(card->dev, "Missing Clock Master information\n"); > + goto err; > + } > + > + /* Set Clock Source for CDCLK */ > + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK, > + rfs, cdclk_dir); > + if (ret < 0) { > + dev_err(card->dev, "Failed to set CDCLK: %d\n", ret); > + goto err; > + } > + > + ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_RCLK, psr); > + if (ret < 0) { > + dev_err(card->dev, "Failed to set PSR: %d\n", ret); > + goto err; > + } > + > + ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs); > + if (ret < 0) { > + dev_err(card->dev, "Failed to set BCLK: %d\n", ret); > + goto err; > + } > + > + if (priv->tdm_slots) { > + ret = snd_soc_dai_set_tdm_slot(cpu_dai, false, false, > + priv->tdm_slots, priv->tdm_slot_width); > + if (ret < 0) { > + dev_err(card->dev, > + "Failed to configure in TDM mode:%d\n", ret); > + goto err; > + } > + } > + > +err: > + return ret; > +} > + > +static const struct snd_soc_ops fsd_card_ops = { > + .hw_params = fsd_card_hw_params, > +}; > + > +static struct fsd_card_priv *fsd_card_parse_of(struct snd_soc_card *card) > +{ > + struct fsd_card_priv *priv; > + struct snd_soc_dai_link *link; > + struct device *dev = card->dev; > + struct device_node *node = dev->of_node; > + struct device_node *np, *cpu_node, *codec_node; > + struct snd_soc_dai_link_component *dlc; > + int ret, id = 0, num_links; > + > + ret = snd_soc_of_parse_card_name(card, "model"); > + if (ret) { > + dev_err(dev, "Error parsing card name: %d\n", ret); > + return ERR_PTR(ret); return dev_err_probe > + } > + > + if (of_property_read_bool(dev->of_node, "widgets")) { > + ret = snd_soc_of_parse_audio_simple_widgets(card, "widgets"); > + if (ret) > + return ERR_PTR(ret); > + } > + > + /* Add DAPM routes to the card */ > + if (of_property_read_bool(node, "audio-routing")) { > + ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); > + if (ret) > + return ERR_PTR(ret); > + } > + > + num_links = of_get_child_count(node); > + > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return ERR_PTR(-ENOMEM); > + > + priv->dai_link = devm_kzalloc(dev, num_links * sizeof(*priv->dai_link), > + GFP_KERNEL); > + if (!priv->dai_link) > + return ERR_PTR(-ENOMEM); > + > + priv->tdm_slots = 0; > + priv->tdm_slot_width = 0; > + > + snd_soc_of_parse_tdm_slot(node, NULL, NULL, &priv->tdm_slots, > + &priv->tdm_slot_width); > + > + link = priv->dai_link; > + > + for_each_child_of_node(node, np) { > + dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); > + if (!dlc) > + return ERR_PTR(-ENOMEM); > + > + link->id = id; > + link->cpus = &dlc[0]; > + link->platforms = &dlc[1]; > + link->num_cpus = 1; > + link->num_codecs = 1; > + link->num_platforms = 1; > + > + cpu_node = of_get_child_by_name(np, "cpu"); > + if (!cpu_node) { > + dev_err(dev, "Missing CPU/Codec node\n"); > + ret = -EINVAL; > + goto err_cpu_node; > + } > + > + ret = snd_soc_of_get_dai_link_cpus(dev, cpu_node, link); > + if (ret < 0) { > + dev_err(dev, "Error Parsing CPU DAI name\n"); > + goto err_cpu_name; > + } > + > + link->platforms->of_node = link->cpus->of_node; > + > + codec_node = of_get_child_by_name(np, "codec"); > + if (codec_node) { > + ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, > + link); > + if (ret < 0) { > + dev_err(dev, "Error Parsing Codec DAI name\n"); > + goto err_codec_name; > + } > + } else { > + dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); > + if (!dlc) { > + ret = -ENOMEM; > + goto err_cpu_name; > + } > + > + link->codecs = dlc; > + > + link->codecs->dai_name = "snd-soc-dummy-dai"; > + link->codecs->name = "snd-soc-dummy"; > + link->dynamic = 1; > + > + snd_soc_dai_link_set_capabilities(link); > + link->ignore_suspend = 1; > + link->nonatomic = 1; > + } > + > + ret = asoc_simple_parse_daifmt(dev, np, codec_node, > + FSD_PREFIX, &link->dai_fmt); > + if (ret) > + link->dai_fmt = SND_SOC_DAIFMT_NB_NF | > + SND_SOC_DAIFMT_CBC_CFC | > + SND_SOC_DAIFMT_I2S; > + > + ret = of_property_read_string(np, "link-name", &link->name); > + if (ret) { > + dev_err(card->dev, "Error Parsing link name\n"); > + goto err_codec_name; > + } > + > + link->stream_name = link->name; > + link->ops = &fsd_card_ops; > + > + link++; > + id++; > + > + of_node_put(cpu_node); > + of_node_put(codec_node); > + } > + > + card->dai_link = priv->dai_link; > + card->num_links = num_links; > + > + return priv; > + > +err_codec_name: > + of_node_put(codec_node); > +err_cpu_name: > + of_node_put(cpu_node); > +err_cpu_node: > + of_node_put(np); > + return ERR_PTR(ret); > +} > + > +static int fsd_platform_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct snd_soc_card *card; > + struct fsd_card_priv *fsd_priv; > + > + card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); > + if (!card) > + return -ENOMEM; > + > + card->dev = dev; > + fsd_priv = fsd_card_parse_of(card); Drop the indentation before = > + > + if (IS_ERR(fsd_priv)) { > + dev_err(&pdev->dev, "Error Parsing DAI Link: %ld\n", > + PTR_ERR(fsd_priv)); > + return PTR_ERR(fsd_priv); return dev_err_probe > + } > + > + snd_soc_card_set_drvdata(card, fsd_priv); > + > + return devm_snd_soc_register_card(&pdev->dev, card); > +} > + > +static const struct of_device_id fsd_device_id[] = { > + { .compatible = "tesla,fsd-card" }, > + {}, > +}; > +MODULE_DEVICE_TABLE(of, fsd_device_id); > + > +static struct platform_driver fsd_platform_driver = { > + .driver = { > + .name = "fsd-card", > + .of_match_table = of_match_ptr(fsd_device_id), of_match_ptr comes with maybe_unused. Or drop it. Best regards, Krzysztof
> -----Original Message----- > From: Mark Brown [mailto:broonie@kernel.org] > Sent: 14 October 2022 05:53 PM > To: Padmanabhan Rajanbabu <p.rajanbabu@samsung.com> > Cc: lgirdwood@gmail.com; robh+dt@kernel.org; > krzysztof.kozlowski+dt@linaro.org; s.nawrocki@samsung.com; > perex@perex.cz; tiwai@suse.com; pankaj.dubey@samsung.com; > alim.akhtar@samsung.com; rcsekar@samsung.com; > aswani.reddy@samsung.com; alsa-devel@alsa-project.org; > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-samsung- > soc@vger.kernel.org > Subject: Re: [PATCH 4/6] ASoC: samsung: fsd: Add FSD soundcard driver > > On Fri, Oct 14, 2022 at 03:51:49PM +0530, Padmanabhan Rajanbabu wrote: > > > +++ b/sound/soc/samsung/fsd-card.c > > @@ -0,0 +1,349 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * ALSA SoC Audio Layer - FSD Soundcard driver > > + * > > + * Copyright (c) 2022 Samsung Electronics Co. Ltd. > > + * Padmanabhan Rajanbabu <p.rajanbabu@samsung.com> > > Please make the entire comment a C++ one so things look more intentional. okay > > > + if (link->dai_fmt & SND_SOC_DAIFMT_CBC_CFC) { > > + cdclk_dir = SND_SOC_CLOCK_OUT; > > + } else if (link->dai_fmt & SND_SOC_DAIFMT_CBP_CFP) { > > + cdclk_dir = SND_SOC_CLOCK_IN; > > + } else { > > + dev_err(card->dev, "Missing Clock Master information\n"); > > + goto err; > > + } > > We're trying to modernise the langauge around clock providers, please use > that term rather than the outdated terminology here. Okay, I'll make the necessary change for the clock terminologies in the next patch set > > > + if (priv->tdm_slots) { > > + ret = snd_soc_dai_set_tdm_slot(cpu_dai, false, false, > > + priv->tdm_slots, priv->tdm_slot_width); > > + if (ret < 0) { > > + dev_err(card->dev, > > + "Failed to configure in TDM mode:%d\n", > ret); > > + goto err; > > + } > > + } > > Just set things once on probe if they don't depend on the configuration, it's > neater and marginally faster if nothing else. Okay > > > + if (of_property_read_bool(dev->of_node, "widgets")) { > > + ret = snd_soc_of_parse_audio_simple_widgets(card, > "widgets"); > > + if (ret) > > + return ERR_PTR(ret); > > + } > > + > > + /* Add DAPM routes to the card */ > > + if (of_property_read_bool(node, "audio-routing")) { > > + ret = snd_soc_of_parse_audio_routing(card, "audio- > routing"); > > + if (ret) > > + return ERR_PTR(ret); > > + } > > Just fix the library functions to handle missing properties gracefully, every > card is going to need the same code here. Okay Thank you for reviewing the patch
> -----Original Message----- > From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@linaro.org] > Sent: 16 October 2022 08:48 PM > To: Padmanabhan Rajanbabu <p.rajanbabu@samsung.com>; > lgirdwood@gmail.com; broonie@kernel.org; robh+dt@kernel.org; > krzysztof.kozlowski+dt@linaro.org; s.nawrocki@samsung.com; > perex@perex.cz; tiwai@suse.com; pankaj.dubey@samsung.com; > alim.akhtar@samsung.com; rcsekar@samsung.com; > aswani.reddy@samsung.com > Cc: alsa-devel@alsa-project.org; devicetree@vger.kernel.org; linux- > kernel@vger.kernel.org; linux-samsung-soc@vger.kernel.org > Subject: Re: [PATCH 4/6] ASoC: samsung: fsd: Add FSD soundcard driver > > On 14/10/2022 06:21, Padmanabhan Rajanbabu wrote: > > Add a soundcard driver for FSD audio interface to bridge the CPU DAI > > of samsung I2S with the codec and platform driver. > > > > Thank you for your patch. There is something to discuss/improve. > > > + > > +#define FSD_PREFIX "tesla," > > +#define FSD_DAI_SRC_PCLK 3 > > +#define FSD_DAI_RFS_192 192 > > +#define FSD_DAI_BFS_48 48 > > +#define FSD_DAI_BFS_96 96 > > +#define FSD_DAI_BFS_192 192 > > + > > +struct fsd_card_priv { > > + struct snd_soc_card card; > > + struct snd_soc_dai_link *dai_link; > > + u32 tdm_slots; > > + u32 tdm_slot_width; > > +}; > > + > > +static unsigned int fsd_card_get_rfs(unsigned int rate) { > > + return FSD_DAI_RFS_192; > > This wrapper is a bit silly... okay, will remove the wrapper and assign the macro value directly > > > +} > > + > > +static unsigned int fsd_card_get_bfs(unsigned int channels) { > > + switch (channels) { > > + case 1: > > + case 2: > > + return FSD_DAI_BFS_48; > > + case 3: > > + case 4: > > + return FSD_DAI_BFS_96; > > + case 5: > > + case 6: > > + case 7: > > + case 8: > > + return FSD_DAI_BFS_192; > > + default: > > + return FSD_DAI_BFS_48; > > + } > > +} > > + > > +static unsigned int fsd_card_get_psr(unsigned int rate) { > > + switch (rate) { > > + case 8000: return 43; > > + case 11025: return 31; > > + case 16000: return 21; > > + case 22050: return 16; > > + case 32000: return 11; > > + case 44100: return 8; > > + case 48000: return 7; > > + case 64000: return 5; > > + case 88200: return 4; > > + case 96000: return 4; > > + case 192000: return 2; > > + default: return 1; > > + } > > +} > > + > > +static int fsd_card_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_card *card = rtd->card; > > + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); > > + struct snd_soc_dai_link *link = rtd->dai_link; > > + struct fsd_card_priv *priv = snd_soc_card_get_drvdata(card); > > + unsigned int rfs, bfs, psr; > > + int ret = 0, cdclk_dir; > > + > > + rfs = fsd_card_get_rfs(params_rate(params)); > > + bfs = fsd_card_get_bfs(params_channels(params)); > > + psr = fsd_card_get_psr(params_rate(params)); > > + > > + /* Configure the Root Clock Source */ > > + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK, > > + false, FSD_DAI_SRC_PCLK); > > + if (ret < 0) { > > + dev_err(card->dev, "Failed to set OPCLK: %d\n", ret); > > + goto err; > > + } > > + > > + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0, > > + false, false); > > + if (ret < 0) { > > + dev_err(card->dev, "Failed to set RCLKSRC: %d\n", ret); > > Don't you need to cleanup on error paths? we might not be needing, since the sound card neither configures any clock sources directly nor involves in any memory allocation during hw_params. > > > + goto err; > > + } > > + > > + /* Set CPU DAI configuration */ > > + ret = snd_soc_dai_set_fmt(cpu_dai, link->dai_fmt); > > + if (ret < 0) { > > + dev_err(card->dev, "Failed to set DAIFMT: %d\n", ret); > > + goto err; > > + } > > + > > + if (link->dai_fmt & SND_SOC_DAIFMT_CBC_CFC) { > > + cdclk_dir = SND_SOC_CLOCK_OUT; > > + } else if (link->dai_fmt & SND_SOC_DAIFMT_CBP_CFP) { > > + cdclk_dir = SND_SOC_CLOCK_IN; > > + } else { > > + dev_err(card->dev, "Missing Clock Master information\n"); > > + goto err; > > + } > > + > > + /* Set Clock Source for CDCLK */ > > + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK, > > + rfs, cdclk_dir); > > + if (ret < 0) { > > + dev_err(card->dev, "Failed to set CDCLK: %d\n", ret); > > + goto err; > > + } > > + > > + ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_RCLK, psr); > > + if (ret < 0) { > > + dev_err(card->dev, "Failed to set PSR: %d\n", ret); > > + goto err; > > + } > > + > > + ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs); > > + if (ret < 0) { > > + dev_err(card->dev, "Failed to set BCLK: %d\n", ret); > > + goto err; > > + } > > + > > + if (priv->tdm_slots) { > > + ret = snd_soc_dai_set_tdm_slot(cpu_dai, false, false, > > + priv->tdm_slots, priv->tdm_slot_width); > > + if (ret < 0) { > > + dev_err(card->dev, > > + "Failed to configure in TDM mode:%d\n", ret); > > + goto err; > > + } > > + } > > + > > +err: > > + return ret; > > +} > > + > > +static const struct snd_soc_ops fsd_card_ops = { > > + .hw_params = fsd_card_hw_params, > > +}; > > + > > +static struct fsd_card_priv *fsd_card_parse_of(struct snd_soc_card > > +*card) { > > + struct fsd_card_priv *priv; > > + struct snd_soc_dai_link *link; > > + struct device *dev = card->dev; > > + struct device_node *node = dev->of_node; > > + struct device_node *np, *cpu_node, *codec_node; > > + struct snd_soc_dai_link_component *dlc; > > + int ret, id = 0, num_links; > > + > > + ret = snd_soc_of_parse_card_name(card, "model"); > > + if (ret) { > > + dev_err(dev, "Error parsing card name: %d\n", ret); > > + return ERR_PTR(ret); > > return dev_err_probe Okay > > > + } > > + > > + if (of_property_read_bool(dev->of_node, "widgets")) { > > + ret = snd_soc_of_parse_audio_simple_widgets(card, "widgets"); > > + if (ret) > > + return ERR_PTR(ret); > > + } > > + > > + /* Add DAPM routes to the card */ > > + if (of_property_read_bool(node, "audio-routing")) { > > + ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); > > + if (ret) > > + return ERR_PTR(ret); > > + } > > + > > + num_links = of_get_child_count(node); > > + > > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > > + if (!priv) > > + return ERR_PTR(-ENOMEM); > > + > > + priv->dai_link = devm_kzalloc(dev, num_links * sizeof(*priv- > >dai_link), > > + GFP_KERNEL); > > + if (!priv->dai_link) > > + return ERR_PTR(-ENOMEM); > > + > > + priv->tdm_slots = 0; > > + priv->tdm_slot_width = 0; > > + > > + snd_soc_of_parse_tdm_slot(node, NULL, NULL, &priv->tdm_slots, > > + &priv->tdm_slot_width); > > + > > + link = priv->dai_link; > > + > > + for_each_child_of_node(node, np) { > > + dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); > > + if (!dlc) > > + return ERR_PTR(-ENOMEM); > > + > > + link->id = id; > > + link->cpus = &dlc[0]; > > + link->platforms = &dlc[1]; > > + link->num_cpus = 1; > > + link->num_codecs = 1; > > + link->num_platforms = 1; > > + > > + cpu_node = of_get_child_by_name(np, "cpu"); > > + if (!cpu_node) { > > + dev_err(dev, "Missing CPU/Codec node\n"); > > + ret = -EINVAL; > > + goto err_cpu_node; > > + } > > + > > + ret = snd_soc_of_get_dai_link_cpus(dev, cpu_node, link); > > + if (ret < 0) { > > + dev_err(dev, "Error Parsing CPU DAI name\n"); > > + goto err_cpu_name; > > + } > > + > > + link->platforms->of_node = link->cpus->of_node; > > + > > + codec_node = of_get_child_by_name(np, "codec"); > > + if (codec_node) { > > + ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, > > + link); > > + if (ret < 0) { > > + dev_err(dev, "Error Parsing Codec DAI name\n"); > > + goto err_codec_name; > > + } > > + } else { > > + dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); > > + if (!dlc) { > > + ret = -ENOMEM; > > + goto err_cpu_name; > > + } > > + > > + link->codecs = dlc; > > + > > + link->codecs->dai_name = "snd-soc-dummy-dai"; > > + link->codecs->name = "snd-soc-dummy"; > > + link->dynamic = 1; > > + > > + snd_soc_dai_link_set_capabilities(link); > > + link->ignore_suspend = 1; > > + link->nonatomic = 1; > > + } > > + > > + ret = asoc_simple_parse_daifmt(dev, np, codec_node, > > + FSD_PREFIX, &link->dai_fmt); > > + if (ret) > > + link->dai_fmt = SND_SOC_DAIFMT_NB_NF | > > + SND_SOC_DAIFMT_CBC_CFC | > > + SND_SOC_DAIFMT_I2S; > > + > > + ret = of_property_read_string(np, "link-name", &link- > >name); > > + if (ret) { > > + dev_err(card->dev, "Error Parsing link name\n"); > > + goto err_codec_name; > > + } > > + > > + link->stream_name = link->name; > > + link->ops = &fsd_card_ops; > > + > > + link++; > > + id++; > > + > > + of_node_put(cpu_node); > > + of_node_put(codec_node); > > + } > > + > > + card->dai_link = priv->dai_link; > > + card->num_links = num_links; > > + > > + return priv; > > + > > +err_codec_name: > > + of_node_put(codec_node); > > +err_cpu_name: > > + of_node_put(cpu_node); > > +err_cpu_node: > > + of_node_put(np); > > + return ERR_PTR(ret); > > +} > > + > > +static int fsd_platform_probe(struct platform_device *pdev) { > > + struct device *dev = &pdev->dev; > > + struct snd_soc_card *card; > > + struct fsd_card_priv *fsd_priv; > > + > > + card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); > > + if (!card) > > + return -ENOMEM; > > + > > + card->dev = dev; > > + fsd_priv = fsd_card_parse_of(card); > > Drop the indentation before = Okay > > > + > > + if (IS_ERR(fsd_priv)) { > > + dev_err(&pdev->dev, "Error Parsing DAI Link: %ld\n", > > + PTR_ERR(fsd_priv)); > > + return PTR_ERR(fsd_priv); > > return dev_err_probe Okay > > > + } > > + > > + snd_soc_card_set_drvdata(card, fsd_priv); > > + > > + return devm_snd_soc_register_card(&pdev->dev, card); } > > + > > +static const struct of_device_id fsd_device_id[] = { > > + { .compatible = "tesla,fsd-card" }, > > + {}, > > +}; > > +MODULE_DEVICE_TABLE(of, fsd_device_id); > > + > > +static struct platform_driver fsd_platform_driver = { > > + .driver = { > > + .name = "fsd-card", > > + .of_match_table = of_match_ptr(fsd_device_id), > > of_match_ptr comes with maybe_unused. Or drop it. Okay > > > > Best regards, > Krzysztof Thank you for reviewing the patch.
diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig index 2a61e620cd3b..344503522bd3 100644 --- a/sound/soc/samsung/Kconfig +++ b/sound/soc/samsung/Kconfig @@ -239,4 +239,16 @@ config SND_SOC_SAMSUNG_MIDAS_WM1811 help Say Y if you want to add support for SoC audio on the Midas boards. +config SND_SOC_TESLA_FSD + tristate "SoC I2S Audio support for Tesla FSD board" + depends on SND_SOC_SAMSUNG + select SND_SIMPLE_CARD_UTILS + select SND_SAMSUNG_I2S + help + Say Y if you want to add support for SOC audio on the FSD board. + This will select the SND_SIMPLE_CARD_UTILS to use the dummy + codec driver, incase the codec node is not specified in the device + tree. This sound card driver uses Samsung I2S controller as CPU + and platform DAI. + endif #SND_SOC_SAMSUNG diff --git a/sound/soc/samsung/Makefile b/sound/soc/samsung/Makefile index 398e843f388c..0dad88fdb1a8 100644 --- a/sound/soc/samsung/Makefile +++ b/sound/soc/samsung/Makefile @@ -43,6 +43,7 @@ snd-soc-arndale-objs := arndale.o snd-soc-tm2-wm5110-objs := tm2_wm5110.o snd-soc-aries-wm8994-objs := aries_wm8994.o snd-soc-midas-wm1811-objs := midas_wm1811.o +snd-soc-fsd-objs := fsd-card.o obj-$(CONFIG_SND_SOC_SAMSUNG_JIVE_WM8750) += snd-soc-jive-wm8750.o obj-$(CONFIG_SND_SOC_SAMSUNG_NEO1973_WM8753) += snd-soc-neo1973-wm8753.o @@ -68,3 +69,4 @@ obj-$(CONFIG_SND_SOC_ARNDALE) += snd-soc-arndale.o obj-$(CONFIG_SND_SOC_SAMSUNG_TM2_WM5110) += snd-soc-tm2-wm5110.o obj-$(CONFIG_SND_SOC_SAMSUNG_ARIES_WM8994) += snd-soc-aries-wm8994.o obj-$(CONFIG_SND_SOC_SAMSUNG_MIDAS_WM1811) += snd-soc-midas-wm1811.o +obj-$(CONFIG_SND_SOC_TESLA_FSD) += snd-soc-fsd.o diff --git a/sound/soc/samsung/fsd-card.c b/sound/soc/samsung/fsd-card.c new file mode 100644 index 000000000000..806a4d3b99fd --- /dev/null +++ b/sound/soc/samsung/fsd-card.c @@ -0,0 +1,349 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ALSA SoC Audio Layer - FSD Soundcard driver + * + * Copyright (c) 2022 Samsung Electronics Co. Ltd. + * Padmanabhan Rajanbabu <p.rajanbabu@samsung.com> + */ + + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/device.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> + +#include <sound/initval.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> +#include <sound/simple_card_utils.h> + +#include "i2s.h" +#include "i2s-regs.h" + +#define FSD_PREFIX "tesla," +#define FSD_DAI_SRC_PCLK 3 +#define FSD_DAI_RFS_192 192 +#define FSD_DAI_BFS_48 48 +#define FSD_DAI_BFS_96 96 +#define FSD_DAI_BFS_192 192 + +struct fsd_card_priv { + struct snd_soc_card card; + struct snd_soc_dai_link *dai_link; + u32 tdm_slots; + u32 tdm_slot_width; +}; + +static unsigned int fsd_card_get_rfs(unsigned int rate) +{ + return FSD_DAI_RFS_192; +} + +static unsigned int fsd_card_get_bfs(unsigned int channels) +{ + switch (channels) { + case 1: + case 2: + return FSD_DAI_BFS_48; + case 3: + case 4: + return FSD_DAI_BFS_96; + case 5: + case 6: + case 7: + case 8: + return FSD_DAI_BFS_192; + default: + return FSD_DAI_BFS_48; + } +} + +static unsigned int fsd_card_get_psr(unsigned int rate) +{ + switch (rate) { + case 8000: return 43; + case 11025: return 31; + case 16000: return 21; + case 22050: return 16; + case 32000: return 11; + case 44100: return 8; + case 48000: return 7; + case 64000: return 5; + case 88200: return 4; + case 96000: return 4; + case 192000: return 2; + default: return 1; + } +} + +static int fsd_card_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_card *card = rtd->card; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + struct snd_soc_dai_link *link = rtd->dai_link; + struct fsd_card_priv *priv = snd_soc_card_get_drvdata(card); + unsigned int rfs, bfs, psr; + int ret = 0, cdclk_dir; + + rfs = fsd_card_get_rfs(params_rate(params)); + bfs = fsd_card_get_bfs(params_channels(params)); + psr = fsd_card_get_psr(params_rate(params)); + + /* Configure the Root Clock Source */ + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK, + false, FSD_DAI_SRC_PCLK); + if (ret < 0) { + dev_err(card->dev, "Failed to set OPCLK: %d\n", ret); + goto err; + } + + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0, + false, false); + if (ret < 0) { + dev_err(card->dev, "Failed to set RCLKSRC: %d\n", ret); + goto err; + } + + /* Set CPU DAI configuration */ + ret = snd_soc_dai_set_fmt(cpu_dai, link->dai_fmt); + if (ret < 0) { + dev_err(card->dev, "Failed to set DAIFMT: %d\n", ret); + goto err; + } + + if (link->dai_fmt & SND_SOC_DAIFMT_CBC_CFC) { + cdclk_dir = SND_SOC_CLOCK_OUT; + } else if (link->dai_fmt & SND_SOC_DAIFMT_CBP_CFP) { + cdclk_dir = SND_SOC_CLOCK_IN; + } else { + dev_err(card->dev, "Missing Clock Master information\n"); + goto err; + } + + /* Set Clock Source for CDCLK */ + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK, + rfs, cdclk_dir); + if (ret < 0) { + dev_err(card->dev, "Failed to set CDCLK: %d\n", ret); + goto err; + } + + ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_RCLK, psr); + if (ret < 0) { + dev_err(card->dev, "Failed to set PSR: %d\n", ret); + goto err; + } + + ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs); + if (ret < 0) { + dev_err(card->dev, "Failed to set BCLK: %d\n", ret); + goto err; + } + + if (priv->tdm_slots) { + ret = snd_soc_dai_set_tdm_slot(cpu_dai, false, false, + priv->tdm_slots, priv->tdm_slot_width); + if (ret < 0) { + dev_err(card->dev, + "Failed to configure in TDM mode:%d\n", ret); + goto err; + } + } + +err: + return ret; +} + +static const struct snd_soc_ops fsd_card_ops = { + .hw_params = fsd_card_hw_params, +}; + +static struct fsd_card_priv *fsd_card_parse_of(struct snd_soc_card *card) +{ + struct fsd_card_priv *priv; + struct snd_soc_dai_link *link; + struct device *dev = card->dev; + struct device_node *node = dev->of_node; + struct device_node *np, *cpu_node, *codec_node; + struct snd_soc_dai_link_component *dlc; + int ret, id = 0, num_links; + + ret = snd_soc_of_parse_card_name(card, "model"); + if (ret) { + dev_err(dev, "Error parsing card name: %d\n", ret); + return ERR_PTR(ret); + } + + if (of_property_read_bool(dev->of_node, "widgets")) { + ret = snd_soc_of_parse_audio_simple_widgets(card, "widgets"); + if (ret) + return ERR_PTR(ret); + } + + /* Add DAPM routes to the card */ + if (of_property_read_bool(node, "audio-routing")) { + ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); + if (ret) + return ERR_PTR(ret); + } + + num_links = of_get_child_count(node); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return ERR_PTR(-ENOMEM); + + priv->dai_link = devm_kzalloc(dev, num_links * sizeof(*priv->dai_link), + GFP_KERNEL); + if (!priv->dai_link) + return ERR_PTR(-ENOMEM); + + priv->tdm_slots = 0; + priv->tdm_slot_width = 0; + + snd_soc_of_parse_tdm_slot(node, NULL, NULL, &priv->tdm_slots, + &priv->tdm_slot_width); + + link = priv->dai_link; + + for_each_child_of_node(node, np) { + dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); + if (!dlc) + return ERR_PTR(-ENOMEM); + + link->id = id; + link->cpus = &dlc[0]; + link->platforms = &dlc[1]; + link->num_cpus = 1; + link->num_codecs = 1; + link->num_platforms = 1; + + cpu_node = of_get_child_by_name(np, "cpu"); + if (!cpu_node) { + dev_err(dev, "Missing CPU/Codec node\n"); + ret = -EINVAL; + goto err_cpu_node; + } + + ret = snd_soc_of_get_dai_link_cpus(dev, cpu_node, link); + if (ret < 0) { + dev_err(dev, "Error Parsing CPU DAI name\n"); + goto err_cpu_name; + } + + link->platforms->of_node = link->cpus->of_node; + + codec_node = of_get_child_by_name(np, "codec"); + if (codec_node) { + ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, + link); + if (ret < 0) { + dev_err(dev, "Error Parsing Codec DAI name\n"); + goto err_codec_name; + } + } else { + dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); + if (!dlc) { + ret = -ENOMEM; + goto err_cpu_name; + } + + link->codecs = dlc; + + link->codecs->dai_name = "snd-soc-dummy-dai"; + link->codecs->name = "snd-soc-dummy"; + link->dynamic = 1; + + snd_soc_dai_link_set_capabilities(link); + link->ignore_suspend = 1; + link->nonatomic = 1; + } + + ret = asoc_simple_parse_daifmt(dev, np, codec_node, + FSD_PREFIX, &link->dai_fmt); + if (ret) + link->dai_fmt = SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBC_CFC | + SND_SOC_DAIFMT_I2S; + + ret = of_property_read_string(np, "link-name", &link->name); + if (ret) { + dev_err(card->dev, "Error Parsing link name\n"); + goto err_codec_name; + } + + link->stream_name = link->name; + link->ops = &fsd_card_ops; + + link++; + id++; + + of_node_put(cpu_node); + of_node_put(codec_node); + } + + card->dai_link = priv->dai_link; + card->num_links = num_links; + + return priv; + +err_codec_name: + of_node_put(codec_node); +err_cpu_name: + of_node_put(cpu_node); +err_cpu_node: + of_node_put(np); + return ERR_PTR(ret); +} + +static int fsd_platform_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct snd_soc_card *card; + struct fsd_card_priv *fsd_priv; + + card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); + if (!card) + return -ENOMEM; + + card->dev = dev; + fsd_priv = fsd_card_parse_of(card); + + if (IS_ERR(fsd_priv)) { + dev_err(&pdev->dev, "Error Parsing DAI Link: %ld\n", + PTR_ERR(fsd_priv)); + return PTR_ERR(fsd_priv); + } + + snd_soc_card_set_drvdata(card, fsd_priv); + + return devm_snd_soc_register_card(&pdev->dev, card); +} + +static const struct of_device_id fsd_device_id[] = { + { .compatible = "tesla,fsd-card" }, + {}, +}; +MODULE_DEVICE_TABLE(of, fsd_device_id); + +static struct platform_driver fsd_platform_driver = { + .driver = { + .name = "fsd-card", + .of_match_table = of_match_ptr(fsd_device_id), + }, + .probe = fsd_platform_probe, +}; +module_platform_driver(fsd_platform_driver); + +MODULE_AUTHOR("Padmanabhan Rajanbabu <p.rajanbabu@samsung.com>"); +MODULE_DESCRIPTION("FSD ASoC Soundcard Driver"); +MODULE_LICENSE("GPL");
Add a soundcard driver for FSD audio interface to bridge the CPU DAI of samsung I2S with the codec and platform driver. Signed-off-by: Padmanabhan Rajanbabu <p.rajanbabu@samsung.com> --- sound/soc/samsung/Kconfig | 12 ++ sound/soc/samsung/Makefile | 2 + sound/soc/samsung/fsd-card.c | 349 +++++++++++++++++++++++++++++++++++ 3 files changed, 363 insertions(+) create mode 100644 sound/soc/samsung/fsd-card.c