diff options
author | Hector Martin <marcan@marcan.st> | 2023-01-23 09:53:54 +0300 |
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committer | Hector Martin <marcan@marcan.st> | 2023-01-31 14:35:47 +0300 |
commit | 40eaa8c0cbba4a27668c7e01373ccd5b38381e2f (patch) | |
tree | 6b5e45accf7ea9a10aec514e574b790c8bca54bf | |
parent | 1b929c02afd37871d5afb9d498426f83432e71c2 (diff) | |
download | linux-40eaa8c0cbba4a27668c7e01373ccd5b38381e2f.tar.xz |
soc: apple: rtkit: Add apple_rtkit_idle() function
This is yet another low power mode, used by DCP.
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Hector Martin <marcan@marcan.st>
-rw-r--r-- | drivers/soc/apple/rtkit.c | 21 | ||||
-rw-r--r-- | include/linux/soc/apple/rtkit.h | 5 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c index 8ec74d7539eb..efb1fa77dff2 100644 --- a/drivers/soc/apple/rtkit.c +++ b/drivers/soc/apple/rtkit.c @@ -9,6 +9,7 @@ enum { APPLE_RTKIT_PWR_STATE_OFF = 0x00, /* power off, cannot be restarted */ APPLE_RTKIT_PWR_STATE_SLEEP = 0x01, /* sleeping, can be restarted */ + APPLE_RTKIT_PWR_STATE_IDLE = 0x201, /* sleeping, retain state */ APPLE_RTKIT_PWR_STATE_QUIESCED = 0x10, /* running but no communication */ APPLE_RTKIT_PWR_STATE_ON = 0x20, /* normal operating state */ }; @@ -881,6 +882,26 @@ int apple_rtkit_shutdown(struct apple_rtkit *rtk) } EXPORT_SYMBOL_GPL(apple_rtkit_shutdown); +int apple_rtkit_idle(struct apple_rtkit *rtk) +{ + int ret; + + /* if OFF is used here the co-processor will not wake up again */ + ret = apple_rtkit_set_ap_power_state(rtk, + APPLE_RTKIT_PWR_STATE_IDLE); + if (ret) + return ret; + + ret = apple_rtkit_set_iop_power_state(rtk, APPLE_RTKIT_PWR_STATE_IDLE); + if (ret) + return ret; + + rtk->iop_power_state = APPLE_RTKIT_PWR_STATE_IDLE; + rtk->ap_power_state = APPLE_RTKIT_PWR_STATE_IDLE; + return 0; +} +EXPORT_SYMBOL_GPL(apple_rtkit_idle); + int apple_rtkit_quiesce(struct apple_rtkit *rtk) { int ret; diff --git a/include/linux/soc/apple/rtkit.h b/include/linux/soc/apple/rtkit.h index c9cabb679cd1..a2446b45ed7f 100644 --- a/include/linux/soc/apple/rtkit.h +++ b/include/linux/soc/apple/rtkit.h @@ -105,6 +105,11 @@ int apple_rtkit_wake(struct apple_rtkit *rtk); int apple_rtkit_shutdown(struct apple_rtkit *rtk); /* + * Put the co-processor into idle mode + */ +int apple_rtkit_idle(struct apple_rtkit *rtk); + +/* * Checks if RTKit is running and ready to handle messages. */ bool apple_rtkit_is_running(struct apple_rtkit *rtk); |