diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2024-10-01 10:06:11 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-10-15 08:54:16 +0300 |
| commit | 71dce222d5865ccb19b231a84d26ca316a65e255 (patch) | |
| tree | 24524695dc52c9839e3c7ae5c36e0b9a9e4cc06e /sound | |
| parent | 8782ba96851c137388fd2af1cca5d5d537788aad (diff) | |
| download | linux-71dce222d5865ccb19b231a84d26ca316a65e255.tar.xz | |
ALSA/hda: intel-sdw-acpi: add support for sdw-manager-list property read
The DisCo for SoundWire 2.0 spec adds support for a new
sdw-manager-list property. Add it in backwards-compatible mode with
'sdw-master-count', which assumed that all links between 0..count-1
exist.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20241001070611.63288-5-yung-chuan.liao@linux.intel.com
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/hda/intel-sdw-acpi.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/sound/hda/intel-sdw-acpi.c b/sound/hda/intel-sdw-acpi.c index 582e761e7b9f..ed530e0dd4dd 100644 --- a/sound/hda/intel-sdw-acpi.c +++ b/sound/hda/intel-sdw-acpi.c @@ -57,8 +57,10 @@ sdw_intel_scan_controller(struct sdw_intel_acpi_info *info) { struct acpi_device *adev = acpi_fetch_acpi_dev(info->handle); struct fwnode_handle *fwnode; + unsigned long list; unsigned int i; u32 count; + u32 tmp; int ret; if (!adev) @@ -66,10 +68,9 @@ sdw_intel_scan_controller(struct sdw_intel_acpi_info *info) fwnode = acpi_fwnode_handle(adev); - /* Found controller, find links supported */ - ret = fwnode_property_read_u32(fwnode, "mipi-sdw-master-count", &count); - /* + * Found controller, find links supported + * * In theory we could check the number of links supported in * hardware, but in that step we cannot assume SoundWire IP is * powered. @@ -80,11 +81,19 @@ sdw_intel_scan_controller(struct sdw_intel_acpi_info *info) * * We will check the hardware capabilities in the startup() step */ - + ret = fwnode_property_read_u32(fwnode, "mipi-sdw-manager-list", &tmp); if (ret) { - dev_err(&adev->dev, - "Failed to read mipi-sdw-master-count: %d\n", ret); - return ret; + ret = fwnode_property_read_u32(fwnode, "mipi-sdw-master-count", &count); + if (ret) { + dev_err(&adev->dev, + "Failed to read mipi-sdw-master-count: %d\n", + ret); + return ret; + } + list = GENMASK(count - 1, 0); + } else { + list = tmp; + count = hweight32(list); } /* Check count is within bounds */ @@ -103,7 +112,7 @@ sdw_intel_scan_controller(struct sdw_intel_acpi_info *info) info->count = count; info->link_mask = 0; - for (i = 0; i < count; i++) { + for_each_set_bit(i, &list, SDW_INTEL_MAX_LINKS) { if (ctrl_link_mask && !(ctrl_link_mask & BIT(i))) { dev_dbg(&adev->dev, "Link %d masked, will not be enabled\n", i); |