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HID: intel_ish-hid: HBM: Use connected standby state bit during suspend/resume

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The individual sensor drivers implemented in the ISH firmware needs
capability to take special actions when there is a change in the system
standby state. The ISH core firmware passes this notification to
individual sensor drivers in response to the OS request via connected
standby bit in the SYSTEM_STATE_STATUS command.

This change sets CONNECTED_STANDBY_STATE_BIT bit to 1 during suspend
callback and clears during resume callback.

Signed-off-by: Ye Xiang <xiang.ye@intel.com>
[srinivas.pandruvada@linux.intel.com: changelog rewrite]
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Ye Xiang 2021-03-16 13:23:34 -07:00 committed by Jiri Kosina
parent e71da1fd0e
commit 94cad2ddb2
2 changed files with 4 additions and 3 deletions
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6
drivers/hid/intel-ish-hid/ishtp/hbm.c
View file

@ -914,7 +914,7 @@ static inline void fix_cl_hdr(struct ishtp_msg_hdr *hdr, size_t length,
/*** Suspend and resume notification ***/
static uint32_t current_state;
static uint32_t supported_states = 0 | SUSPEND_STATE_BIT;
static uint32_t supported_states = SUSPEND_STATE_BIT | CONNECTED_STANDBY_STATE_BIT;
/**
* ishtp_send_suspend() - Send suspend message to FW
@ -933,7 +933,7 @@ void ishtp_send_suspend(struct ishtp_device *dev)
memset(&state_status_msg, 0, len);
state_status_msg.hdr.cmd = SYSTEM_STATE_STATUS;
state_status_msg.supported_states = supported_states;
current_state |= SUSPEND_STATE_BIT;
current_state |= (SUSPEND_STATE_BIT | CONNECTED_STANDBY_STATE_BIT);
dev->print_log(dev, "%s() sends SUSPEND notification\n", __func__);
state_status_msg.states_status = current_state;
@ -959,7 +959,7 @@ void ishtp_send_resume(struct ishtp_device *dev)
memset(&state_status_msg, 0, len);
state_status_msg.hdr.cmd = SYSTEM_STATE_STATUS;
state_status_msg.supported_states = supported_states;
current_state &= ~SUSPEND_STATE_BIT;
current_state &= ~(CONNECTED_STANDBY_STATE_BIT | SUSPEND_STATE_BIT);
dev->print_log(dev, "%s() sends RESUME notification\n", __func__);
state_status_msg.states_status = current_state;

1
drivers/hid/intel-ish-hid/ishtp/hbm.h
View file

@ -235,6 +235,7 @@ struct dma_xfer_hbm {
#define SYSTEM_STATE_QUERY_SUBSCRIBERS 0x3
#define SYSTEM_STATE_STATE_CHANGE_REQ 0x4
/*indicates suspend and resume states*/
#define CONNECTED_STANDBY_STATE_BIT (1<<0)
#define SUSPEND_STATE_BIT (1<<1)
struct ish_system_states_header {