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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2020-03-25 16:50:17 -0500
committerMark Brown <broonie@kernel.org>2020-03-27 15:16:28 +0000
commit004bd4163104e4d8b6c1433b31ead10a69c69845 (patch)
treef162747340ea12827130c5ecaa54502f878923ae /include/sound
parentb2fc1c08f74444b72f16bd5dc505eca33d1d6c6b (diff)
ASoC: soc-acpi: expand description of _ADR-based devices
For SoundWire, we need to know if endpoints needs to be 'aggregated' (MIPI parlance, meaning logically grouped), e.g. when two speaker amplifiers need to be handled as a single logical output. We don't necessarily have the information at the firmware (BIOS) level, so add a notion of endpoints and specify if a device/endpoint is part of a group, with a position. This may be expanded in future solutions, for now only provide a group and position information. Since we modify the header file, change all existing upstream tables as well to avoid breaking compilation/bisect. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20200325215027.28716-2-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/soc-acpi.h39
1 files changed, 33 insertions, 6 deletions
diff --git a/include/sound/soc-acpi.h b/include/sound/soc-acpi.h
index a217a87cae86..392e953d561e 100644
--- a/include/sound/soc-acpi.h
+++ b/include/sound/soc-acpi.h
@@ -75,18 +75,45 @@ struct snd_soc_acpi_mach_params {
};
/**
- * snd_soc_acpi_link_adr: ACPI-based list of _ADR, with a variable
- * number of devices per link
- *
+ * snd_soc_acpi_endpoint - endpoint descriptor
+ * @num: endpoint number (mandatory, unique per device)
+ * @aggregated: 0 (independent) or 1 (logically grouped)
+ * @group_position: zero-based order (only when @aggregated is 1)
+ * @group_id: platform-unique group identifier (only when @aggregrated is 1)
+ */
+struct snd_soc_acpi_endpoint {
+ u8 num;
+ u8 aggregated;
+ u8 group_position;
+ u8 group_id;
+};
+
+/**
+ * snd_soc_acpi_adr_device - descriptor for _ADR-enumerated device
+ * @adr: 64 bit ACPI _ADR value
+ * @num_endpoints: number of endpoints for this device
+ * @endpoints: array of endpoints
+ */
+struct snd_soc_acpi_adr_device {
+ const u64 adr;
+ const u8 num_endpoints;
+ const struct snd_soc_acpi_endpoint *endpoints;
+};
+
+/**
+ * snd_soc_acpi_link_adr - ACPI-based list of _ADR enumerated devices
* @mask: one bit set indicates the link this list applies to
- * @num_adr: ARRAY_SIZE of adr
- * @adr: array of _ADR (represented as u64).
+ * @num_adr: ARRAY_SIZE of devices
+ * @adr_d: array of devices
+ *
+ * The number of devices per link can be more than 1, e.g. in SoundWire
+ * multi-drop configurations.
*/
struct snd_soc_acpi_link_adr {
const u32 mask;
const u32 num_adr;
- const u64 *adr;
+ const struct snd_soc_acpi_adr_device *adr_d;
};
/**