/* * Copyright (c) 2015 The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * 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 #include #include #include #include #include #include #include #include #include #include struct apq8016_sbc_data { void __iomem *mic_iomux; void __iomem *spkr_iomux; struct snd_soc_dai_link dai_link[]; /* dynamically allocated */ }; #define MIC_CTRL_TER_WS_SLAVE_SEL BIT(21) #define MIC_CTRL_QUA_WS_SLAVE_SEL_10 BIT(17) #define MIC_CTRL_TLMM_SCLK_EN BIT(1) #define SPKR_CTL_PRI_WS_SLAVE_SEL_11 (BIT(17) | BIT(16)) static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_card *card = rtd->card; struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card); int rval = 0; switch (cpu_dai->id) { case MI2S_PRIMARY: writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11, pdata->spkr_iomux); break; case MI2S_QUATERNARY: /* Configure the Quat MI2S to TLMM */ writel(readl(pdata->mic_iomux) | MIC_CTRL_QUA_WS_SLAVE_SEL_10 | MIC_CTRL_TLMM_SCLK_EN, pdata->mic_iomux); break; case MI2S_TERTIARY: writel(readl(pdata->mic_iomux) | MIC_CTRL_TER_WS_SLAVE_SEL | MIC_CTRL_TLMM_SCLK_EN, pdata->mic_iomux); break; default: dev_err(card->dev, "unsupported cpu dai configuration\n"); rval = -EINVAL; break; } return rval; } static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card) { struct device *dev = card->dev; struct snd_soc_dai_link *link; struct device_node *np, *codec, *cpu, *node = dev->of_node; struct apq8016_sbc_data *data; int ret, num_links; ret = snd_soc_of_parse_card_name(card, "qcom,model"); if (ret) { dev_err(dev, "Error parsing card name: %d\n", ret); return ERR_PTR(ret); } /* DAPM routes */ if (of_property_read_bool(node, "qcom,audio-routing")) { ret = snd_soc_of_parse_audio_routing(card, "qcom,audio-routing"); if (ret) return ERR_PTR(ret); } /* Populate links */ num_links = of_get_child_count(node); /* Allocate the private data and the DAI link array */ data = devm_kzalloc(dev, sizeof(*data) + sizeof(*link) * num_links, GFP_KERNEL); if (!data) return ERR_PTR(-ENOMEM); card->dai_link = &data->dai_link[0]; card->num_links = num_links; link = data->dai_link; for_each_child_of_node(node, np) { cpu = of_get_child_by_name(np, "cpu"); codec = of_get_child_by_name(np, "codec"); if (!cpu || !codec) { dev_err(dev, "Can't find cpu/codec DT node\n"); return ERR_PTR(-EINVAL); } link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0); if (!link->cpu_of_node) { dev_err(card->dev, "error getting cpu phandle\n"); return ERR_PTR(-EINVAL); } ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name); if (ret) { dev_err(card->dev, "error getting cpu dai name\n"); return ERR_PTR(ret); } ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); if (ret < 0) { dev_err(card->dev, "error getting codec dai name\n"); return ERR_PTR(ret); } link->platform_of_node = link->cpu_of_node; ret = of_property_read_string(np, "link-name", &link->name); if (ret) { dev_err(card->dev, "error getting codec dai_link name\n"); return ERR_PTR(ret); } link->stream_name = link->name; link->init = apq8016_sbc_dai_init; link++; } return data; } static const struct snd_soc_dapm_widget apq8016_sbc_dapm_widgets[] = { SND_SOC_DAPM_MIC("Handset Mic", NULL), SND_SOC_DAPM_MIC("Headset Mic", NULL), SND_SOC_DAPM_MIC("Secondary Mic", NULL), SND_SOC_DAPM_MIC("Digital Mic1", NULL), SND_SOC_DAPM_MIC("Digital Mic2", NULL), }; static int apq8016_sbc_platform_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct snd_soc_card *card; struct apq8016_sbc_data *data; struct resource *res; card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); if (!card) return -ENOMEM; card->dev = dev; card->dapm_widgets = apq8016_sbc_dapm_widgets; card->num_dapm_widgets = ARRAY_SIZE(apq8016_sbc_dapm_widgets); data = apq8016_sbc_parse_of(card); if (IS_ERR(data)) { dev_err(&pdev->dev, "Error resolving dai links: %ld\n", PTR_ERR(data)); return PTR_ERR(data); } res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mic-iomux"); data->mic_iomux = devm_ioremap_resource(dev, res); if (IS_ERR(data->mic_iomux)) return PTR_ERR(data->mic_iomux); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "spkr-iomux"); data->spkr_iomux = devm_ioremap_resource(dev, res); if (IS_ERR(data->spkr_iomux)) return PTR_ERR(data->spkr_iomux); platform_set_drvdata(pdev, data); snd_soc_card_set_drvdata(card, data); return devm_snd_soc_register_card(&pdev->dev, card); } static const struct of_device_id apq8016_sbc_device_id[] = { { .compatible = "qcom,apq8016-sbc-sndcard" }, {}, }; MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id); static struct platform_driver apq8016_sbc_platform_driver = { .driver = { .name = "qcom-apq8016-sbc", .of_match_table = of_match_ptr(apq8016_sbc_device_id), }, .probe = apq8016_sbc_platform_probe, }; module_platform_driver(apq8016_sbc_platform_driver); MODULE_AUTHOR("Srinivas Kandagatla
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/sound/asound.h')