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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2021-03-01 18:31:24 -0600
committerTakashi Iwai <tiwai@suse.de>2021-03-02 15:33:00 +0100
commit08c2a4bc9f2acaefbd0158866db5cb3238a68674 (patch)
tree8bb4cf7249314c8a536c90e615cc79aa90289b69 /drivers/soundwire
parentcf5807f5f814fcb14fd6c78878e2441918796af9 (diff)
downloadlinux-08c2a4bc9f2acaefbd0158866db5cb3238a68674.tar.bz2
ALSA: hda: move Intel SoundWire ACPI scan to dedicated module
The ACPI scan capabilities is called from the intel-dspconfig as well as the SOF/HDaudio drivers. This creates dependencies and randconfig issues when HDaudio and SOF/SoundWire are not all configured as modules. To simplify Kconfig dependencies between HDAudio, SoundWire, SOF and intel-dspconfig, move the ACPI scan helpers to a dedicated module. This follows the same idea as NHLT helpers which are already handled as a dedicated module. The only functional change is that the kernel parameter to filter links is now handled by a different module, but that was only provided for developers needing work-arounds for early BIOS releases. Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Reviewed-by: Bard Liao <bard.liao@intel.com> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Vinod Koul <vkoul@kernel.org> Link: https://lore.kernel.org/r/20210302003125.1178419-7-pierre-louis.bossart@linux.intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/soundwire')
-rw-r--r--drivers/soundwire/intel.h2
-rw-r--r--drivers/soundwire/intel_init.c158
2 files changed, 0 insertions, 160 deletions
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 76820d0b9deb..06bac8ba14e9 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -48,8 +48,6 @@ struct sdw_intel {
#endif
};
-#define SDW_INTEL_QUIRK_MASK_BUS_DISABLE BIT(1)
-
int intel_master_startup(struct platform_device *pdev);
int intel_master_process_wakeen_event(struct platform_device *pdev);
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index bc8520eb385e..05b726cdfebc 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -18,42 +18,12 @@
#include "cadence_master.h"
#include "intel.h"
-#define SDW_LINK_TYPE 4 /* from Intel ACPI documentation */
-#define SDW_MAX_LINKS 4
#define SDW_SHIM_LCAP 0x0
#define SDW_SHIM_BASE 0x2C000
#define SDW_ALH_BASE 0x2C800
#define SDW_LINK_BASE 0x30000
#define SDW_LINK_SIZE 0x10000
-static int ctrl_link_mask;
-module_param_named(sdw_link_mask, ctrl_link_mask, int, 0444);
-MODULE_PARM_DESC(sdw_link_mask, "Intel link mask (one bit per link)");
-
-static bool is_link_enabled(struct fwnode_handle *fw_node, int i)
-{
- struct fwnode_handle *link;
- char name[32];
- u32 quirk_mask = 0;
-
- /* Find master handle */
- snprintf(name, sizeof(name),
- "mipi-sdw-link-%d-subproperties", i);
-
- link = fwnode_get_named_child_node(fw_node, name);
- if (!link)
- return false;
-
- fwnode_property_read_u32(link,
- "intel-quirk-mask",
- &quirk_mask);
-
- if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE)
- return false;
-
- return true;
-}
-
static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
{
struct sdw_intel_link_res *link = ctx->links;
@@ -81,74 +51,6 @@ static int sdw_intel_cleanup(struct sdw_intel_ctx *ctx)
return 0;
}
-static int
-sdw_intel_scan_controller(struct sdw_intel_acpi_info *info)
-{
- struct acpi_device *adev;
- int ret, i;
- u8 count;
-
- if (acpi_bus_get_device(info->handle, &adev))
- return -EINVAL;
-
- /* Found controller, find links supported */
- count = 0;
- ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev),
- "mipi-sdw-master-count", &count, 1);
-
- /*
- * In theory we could check the number of links supported in
- * hardware, but in that step we cannot assume SoundWire IP is
- * powered.
- *
- * In addition, if the BIOS doesn't even provide this
- * 'master-count' property then all the inits based on link
- * masks will fail as well.
- *
- * We will check the hardware capabilities in the startup() step
- */
-
- if (ret) {
- dev_err(&adev->dev,
- "Failed to read mipi-sdw-master-count: %d\n", ret);
- return -EINVAL;
- }
-
- /* Check count is within bounds */
- if (count > SDW_MAX_LINKS) {
- dev_err(&adev->dev, "Link count %d exceeds max %d\n",
- count, SDW_MAX_LINKS);
- return -EINVAL;
- }
-
- if (!count) {
- dev_warn(&adev->dev, "No SoundWire links detected\n");
- return -EINVAL;
- }
- dev_dbg(&adev->dev, "ACPI reports %d SDW Link devices\n", count);
-
- info->count = count;
- info->link_mask = 0;
-
- for (i = 0; i < count; i++) {
- if (ctrl_link_mask && !(ctrl_link_mask & BIT(i))) {
- dev_dbg(&adev->dev,
- "Link %d masked, will not be enabled\n", i);
- continue;
- }
-
- if (!is_link_enabled(acpi_fwnode_handle(adev), i)) {
- dev_dbg(&adev->dev,
- "Link %d not selected in firmware\n", i);
- continue;
- }
-
- info->link_mask |= BIT(i);
- }
-
- return 0;
-}
-
#define HDA_DSP_REG_ADSPIC2 (0x10)
#define HDA_DSP_REG_ADSPIS2 (0x14)
#define HDA_DSP_REG_ADSPIC2_SNDW BIT(5)
@@ -357,66 +259,6 @@ sdw_intel_startup_controller(struct sdw_intel_ctx *ctx)
return 0;
}
-static acpi_status sdw_intel_acpi_cb(acpi_handle handle, u32 level,
- void *cdata, void **return_value)
-{
- struct sdw_intel_acpi_info *info = cdata;
- struct acpi_device *adev;
- acpi_status status;
- u64 adr;
-
- status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr);
- if (ACPI_FAILURE(status))
- return AE_OK; /* keep going */
-
- if (acpi_bus_get_device(handle, &adev)) {
- pr_err("%s: Couldn't find ACPI handle\n", __func__);
- return AE_NOT_FOUND;
- }
-
- info->handle = handle;
-
- /*
- * On some Intel platforms, multiple children of the HDAS
- * device can be found, but only one of them is the SoundWire
- * controller. The SNDW device is always exposed with
- * Name(_ADR, 0x40000000), with bits 31..28 representing the
- * SoundWire link so filter accordingly
- */
- if (FIELD_GET(GENMASK(31, 28), adr) != SDW_LINK_TYPE)
- return AE_OK; /* keep going */
-
- /* device found, stop namespace walk */
- return AE_CTRL_TERMINATE;
-}
-
-/**
- * sdw_intel_acpi_scan() - SoundWire Intel init routine
- * @parent_handle: ACPI parent handle
- * @info: description of what firmware/DSDT tables expose
- *
- * This scans the namespace and queries firmware to figure out which
- * links to enable. A follow-up use of sdw_intel_probe() and
- * sdw_intel_startup() is required for creation of devices and bus
- * startup
- */
-int sdw_intel_acpi_scan(acpi_handle *parent_handle,
- struct sdw_intel_acpi_info *info)
-{
- acpi_status status;
-
- info->handle = NULL;
- status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
- parent_handle, 1,
- sdw_intel_acpi_cb,
- NULL, info, NULL);
- if (ACPI_FAILURE(status) || info->handle == NULL)
- return -ENODEV;
-
- return sdw_intel_scan_controller(info);
-}
-EXPORT_SYMBOL_NS(sdw_intel_acpi_scan, SOUNDWIRE_INTEL_INIT);
-
/**
* sdw_intel_probe() - SoundWire Intel probe routine
* @res: resource data