diff options
Diffstat (limited to '')
-rw-r--r-- | sound/soc/intel/skylake/skl-nhlt.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c new file mode 100644 index 0000000000..e617b4c335 --- /dev/null +++ b/sound/soc/intel/skylake/skl-nhlt.c @@ -0,0 +1,269 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * skl-nhlt.c - Intel SKL Platform NHLT parsing + * + * Copyright (C) 2015 Intel Corp + * Author: Sanjiv Kumar <sanjiv.kumar@intel.com> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ +#include <linux/pci.h> +#include <sound/intel-nhlt.h> +#include "skl.h" +#include "skl-i2s.h" + +static void skl_nhlt_trim_space(char *trim) +{ + char *s = trim; + int cnt; + int i; + + cnt = 0; + for (i = 0; s[i]; i++) { + if (!isspace(s[i])) + s[cnt++] = s[i]; + } + + s[cnt] = '\0'; +} + +int skl_nhlt_update_topology_bin(struct skl_dev *skl) +{ + struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt; + struct hdac_bus *bus = skl_to_bus(skl); + struct device *dev = bus->dev; + + dev_dbg(dev, "oem_id %.6s, oem_table_id %.8s oem_revision %d\n", + nhlt->header.oem_id, nhlt->header.oem_table_id, + nhlt->header.oem_revision); + + snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s", + skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id, + nhlt->header.oem_revision, "-tplg.bin"); + + skl_nhlt_trim_space(skl->tplg_name); + + return 0; +} + +static ssize_t platform_id_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pci = to_pci_dev(dev); + struct hdac_bus *bus = pci_get_drvdata(pci); + struct skl_dev *skl = bus_to_skl(bus); + struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt; + char platform_id[32]; + + sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id, + nhlt->header.oem_id, nhlt->header.oem_table_id, + nhlt->header.oem_revision); + + skl_nhlt_trim_space(platform_id); + return sysfs_emit(buf, "%s\n", platform_id); +} + +static DEVICE_ATTR_RO(platform_id); + +int skl_nhlt_create_sysfs(struct skl_dev *skl) +{ + struct device *dev = &skl->pci->dev; + + if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr)) + dev_warn(dev, "Error creating sysfs entry\n"); + + return 0; +} + +void skl_nhlt_remove_sysfs(struct skl_dev *skl) +{ + struct device *dev = &skl->pci->dev; + + if (skl->nhlt) + sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr); +} + +/* + * Queries NHLT for all the fmt configuration for a particular endpoint and + * stores all possible rates supported in a rate table for the corresponding + * sclk/sclkfs. + */ +static void skl_get_ssp_clks(struct skl_dev *skl, struct skl_ssp_clk *ssp_clks, + struct nhlt_fmt *fmt, u8 id) +{ + struct skl_i2s_config_blob_ext *i2s_config_ext; + struct skl_i2s_config_blob_legacy *i2s_config; + struct skl_clk_parent_src *parent; + struct skl_ssp_clk *sclk, *sclkfs; + struct nhlt_fmt_cfg *fmt_cfg; + struct wav_fmt_ext *wav_fmt; + unsigned long rate; + int rate_index = 0; + u16 channels, bps; + u8 clk_src; + int i, j; + u32 fs; + + sclk = &ssp_clks[SKL_SCLK_OFS]; + sclkfs = &ssp_clks[SKL_SCLKFS_OFS]; + + if (fmt->fmt_count == 0) + return; + + fmt_cfg = (struct nhlt_fmt_cfg *)fmt->fmt_config; + for (i = 0; i < fmt->fmt_count; i++) { + struct nhlt_fmt_cfg *saved_fmt_cfg = fmt_cfg; + bool present = false; + + wav_fmt = &saved_fmt_cfg->fmt_ext; + + channels = wav_fmt->fmt.channels; + bps = wav_fmt->fmt.bits_per_sample; + fs = wav_fmt->fmt.samples_per_sec; + + /* + * In case of TDM configuration on a ssp, there can + * be more than one blob in which channel masks are + * different for each usecase for a specific rate and bps. + * But the sclk rate will be generated for the total + * number of channels used for that endpoint. + * + * So for the given fs and bps, choose blob which has + * the superset of all channels for that endpoint and + * derive the rate. + */ + for (j = i; j < fmt->fmt_count; j++) { + struct nhlt_fmt_cfg *tmp_fmt_cfg = fmt_cfg; + + wav_fmt = &tmp_fmt_cfg->fmt_ext; + if ((fs == wav_fmt->fmt.samples_per_sec) && + (bps == wav_fmt->fmt.bits_per_sample)) { + channels = max_t(u16, channels, + wav_fmt->fmt.channels); + saved_fmt_cfg = tmp_fmt_cfg; + } + /* Move to the next nhlt_fmt_cfg */ + tmp_fmt_cfg = (struct nhlt_fmt_cfg *)(tmp_fmt_cfg->config.caps + + tmp_fmt_cfg->config.size); + } + + rate = channels * bps * fs; + + /* check if the rate is added already to the given SSP's sclk */ + for (j = 0; (j < SKL_MAX_CLK_RATES) && + (sclk[id].rate_cfg[j].rate != 0); j++) { + if (sclk[id].rate_cfg[j].rate == rate) { + present = true; + break; + } + } + + /* Fill rate and parent for sclk/sclkfs */ + if (!present) { + struct nhlt_fmt_cfg *first_fmt_cfg; + + first_fmt_cfg = (struct nhlt_fmt_cfg *)fmt->fmt_config; + i2s_config_ext = (struct skl_i2s_config_blob_ext *) + first_fmt_cfg->config.caps; + + /* MCLK Divider Source Select */ + if (is_legacy_blob(i2s_config_ext->hdr.sig)) { + i2s_config = ext_to_legacy_blob(i2s_config_ext); + clk_src = get_clk_src(i2s_config->mclk, + SKL_MNDSS_DIV_CLK_SRC_MASK); + } else { + clk_src = get_clk_src(i2s_config_ext->mclk, + SKL_MNDSS_DIV_CLK_SRC_MASK); + } + + parent = skl_get_parent_clk(clk_src); + + /* Move to the next nhlt_fmt_cfg */ + fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps + + fmt_cfg->config.size); + /* + * Do not copy the config data if there is no parent + * clock available for this clock source select + */ + if (!parent) + continue; + + sclk[id].rate_cfg[rate_index].rate = rate; + sclk[id].rate_cfg[rate_index].config = saved_fmt_cfg; + sclkfs[id].rate_cfg[rate_index].rate = rate; + sclkfs[id].rate_cfg[rate_index].config = saved_fmt_cfg; + sclk[id].parent_name = parent->name; + sclkfs[id].parent_name = parent->name; + + rate_index++; + } + } +} + +static void skl_get_mclk(struct skl_dev *skl, struct skl_ssp_clk *mclk, + struct nhlt_fmt *fmt, u8 id) +{ + struct skl_i2s_config_blob_ext *i2s_config_ext; + struct skl_i2s_config_blob_legacy *i2s_config; + struct nhlt_fmt_cfg *fmt_cfg; + struct skl_clk_parent_src *parent; + u32 clkdiv, div_ratio; + u8 clk_src; + + fmt_cfg = (struct nhlt_fmt_cfg *)fmt->fmt_config; + i2s_config_ext = (struct skl_i2s_config_blob_ext *)fmt_cfg->config.caps; + + /* MCLK Divider Source Select and divider */ + if (is_legacy_blob(i2s_config_ext->hdr.sig)) { + i2s_config = ext_to_legacy_blob(i2s_config_ext); + clk_src = get_clk_src(i2s_config->mclk, + SKL_MCLK_DIV_CLK_SRC_MASK); + clkdiv = i2s_config->mclk.mdivr & + SKL_MCLK_DIV_RATIO_MASK; + } else { + clk_src = get_clk_src(i2s_config_ext->mclk, + SKL_MCLK_DIV_CLK_SRC_MASK); + clkdiv = i2s_config_ext->mclk.mdivr[0] & + SKL_MCLK_DIV_RATIO_MASK; + } + + /* bypass divider */ + div_ratio = 1; + + if (clkdiv != SKL_MCLK_DIV_RATIO_MASK) + /* Divider is 2 + clkdiv */ + div_ratio = clkdiv + 2; + + /* Calculate MCLK rate from source using div value */ + parent = skl_get_parent_clk(clk_src); + if (!parent) + return; + + mclk[id].rate_cfg[0].rate = parent->rate/div_ratio; + mclk[id].rate_cfg[0].config = fmt_cfg; + mclk[id].parent_name = parent->name; +} + +void skl_get_clks(struct skl_dev *skl, struct skl_ssp_clk *ssp_clks) +{ + struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt; + struct nhlt_endpoint *epnt; + struct nhlt_fmt *fmt; + int i; + u8 id; + + epnt = (struct nhlt_endpoint *)nhlt->desc; + for (i = 0; i < nhlt->endpoint_count; i++) { + if (epnt->linktype == NHLT_LINK_SSP) { + id = epnt->virtual_bus_id; + + fmt = (struct nhlt_fmt *)(epnt->config.caps + + epnt->config.size); + + skl_get_ssp_clks(skl, ssp_clks, fmt, id); + skl_get_mclk(skl, ssp_clks, fmt, id); + } + epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); + } +} |