diff options
Diffstat (limited to 'include/linux/soundwire')
| -rw-r--r-- | include/linux/soundwire/sdw_intel.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h index 45fa6d93197f..93b83bdf8035 100644 --- a/include/linux/soundwire/sdw_intel.h +++ b/include/linux/soundwire/sdw_intel.h @@ -59,6 +59,40 @@ struct sdw_intel_acpi_info { struct sdw_intel_link_res; +/* Intel clock-stop/pm_runtime quirk definitions */ + +/* + * Force the clock to remain on during pm_runtime suspend. This might + * be needed if Slave devices do not have an alternate clock source or + * if the latency requirements are very strict. + */ +#define SDW_INTEL_CLK_STOP_NOT_ALLOWED BIT(0) + +/* + * Stop the bus during pm_runtime suspend. If set, a complete bus + * reset and re-enumeration will be performed when the bus + * restarts. This mode shall not be used if Slave devices can generate + * in-band wakes. + */ +#define SDW_INTEL_CLK_STOP_TEARDOWN BIT(1) + +/* + * Stop the bus during pm_suspend if Slaves are not wake capable + * (e.g. speaker amplifiers). The clock-stop mode is typically + * slightly higher power than when the IP is completely powered-off. + */ +#define SDW_INTEL_CLK_STOP_WAKE_CAPABLE_ONLY BIT(2) + +/* + * Require a bus reset (and complete re-enumeration) when exiting + * clock stop modes. This may be needed if the controller power was + * turned off and all context lost. This quirk shall not be used if a + * Slave device needs to remain enumerated and keep its context, + * e.g. to provide the reasons for the wake, report acoustic events or + * pass a history buffer. + */ +#define SDW_INTEL_CLK_STOP_BUS_RESET BIT(3) + /** * struct sdw_intel_ctx - context allocated by the controller * driver probe @@ -97,6 +131,8 @@ struct sdw_intel_ctx { * @link_mask: bit-wise mask listing links selected by the DSP driver * This mask may be a subset of the one reported by the controller since * machine-specific quirks are handled in the DSP driver. + * @clock_stop_quirks: mask array of possible behaviors requested by the + * DSP driver. The quirks are common for all links for now. */ struct sdw_intel_res { int count; @@ -107,6 +143,7 @@ struct sdw_intel_res { const struct sdw_intel_ops *ops; struct device *dev; u32 link_mask; + u32 clock_stop_quirks; }; /* |