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