blob: deb7b820325e7f9673072713b5213f3967a91467 [file] [log] [blame]
// 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 sprintf(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);
}
}