Merge branches 'acpi-resources', 'acpi-ec' and 'acpi-sleep' (beb0082e) · Commits · e / devices / android_kernel_teracube_mt6765

drivers/acpi/ec.c

+64 −0

Original line number	Diff line number	Diff line
		@@ -67,6 +67,8 @@ enum ec_command {
		#define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */
		#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
		#define ACPI_EC_MSI_UDELAY 550 /* Wait 550us for MSI EC */
		#define ACPI_EC_CLEAR_MAX 100 /* Maximum number of events to query
		* when trying to clear the EC */

		enum {
		EC_FLAGS_QUERY_PENDING, /* Query is pending */
		@@ -116,6 +118,7 @@ EXPORT_SYMBOL(first_ec);
		static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */
		static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */
		static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */
		static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */

		/* --------------------------------------------------------------------------
		Transaction Management
		@@ -440,6 +443,29 @@ acpi_handle ec_get_handle(void)

		EXPORT_SYMBOL(ec_get_handle);

		static int acpi_ec_query_unlocked(struct acpi_ec ec, u8 data);

		/*
		* Clears stale _Q events that might have accumulated in the EC.
		* Run with locked ec mutex.
		*/
		static void acpi_ec_clear(struct acpi_ec *ec)
		{
		int i, status;
		u8 value = 0;

		for (i = 0; i < ACPI_EC_CLEAR_MAX; i++) {
		status = acpi_ec_query_unlocked(ec, &value);
		if (status \|\| !value)
		break;
		}

		if (unlikely(i == ACPI_EC_CLEAR_MAX))
		pr_warn("Warning: Maximum of %d stale EC events cleared\n", i);
		else
		pr_info("%d stale EC events cleared\n", i);
		}

		void acpi_ec_block_transactions(void)
		{
		struct acpi_ec *ec = first_ec;
		@@ -463,6 +489,10 @@ void acpi_ec_unblock_transactions(void)
		mutex_lock(&ec->mutex);
		/* Allow transactions to be carried out again */
		clear_bit(EC_FLAGS_BLOCKED, &ec->flags);

		if (EC_FLAGS_CLEAR_ON_RESUME)
		acpi_ec_clear(ec);

		mutex_unlock(&ec->mutex);
		}

		@@ -821,6 +851,13 @@ static int acpi_ec_add(struct acpi_device *device)

		/* EC is fully operational, allow queries */
		clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);

		/* Clear stale _Q events if hardware might require that */
		if (EC_FLAGS_CLEAR_ON_RESUME) {
		mutex_lock(&ec->mutex);
		acpi_ec_clear(ec);
		mutex_unlock(&ec->mutex);
		}
		return ret;
		}

		@@ -922,6 +959,30 @@ static int ec_enlarge_storm_threshold(const struct dmi_system_id *id)
		return 0;
		}

		/*
		* On some hardware it is necessary to clear events accumulated by the EC during
		* sleep. These ECs stop reporting GPEs until they are manually polled, if too
		* many events are accumulated. (e.g. Samsung Series 5/9 notebooks)
		*
		* https://bugzilla.kernel.org/show_bug.cgi?id=44161
		*
		* Ideally, the EC should also be instructed NOT to accumulate events during
		* sleep (which Windows seems to do somehow), but the interface to control this
		* behaviour is not known at this time.
		*
		* Models known to be affected are Samsung 530Uxx/535Uxx/540Uxx/550Pxx/900Xxx,
		* however it is very likely that other Samsung models are affected.
		*
		* On systems which don't accumulate _Q events during sleep, this extra check
		* should be harmless.
		*/
		static int ec_clear_on_resume(const struct dmi_system_id *id)
		{
		pr_debug("Detected system needing EC poll on resume.\n");
		EC_FLAGS_CLEAR_ON_RESUME = 1;
		return 0;
		}

		static struct dmi_system_id ec_dmi_table[] __initdata = {
		{
		ec_skip_dsdt_scan, "Compal JFL92", {
		@@ -965,6 +1026,9 @@ static struct dmi_system_id ec_dmi_table[] __initdata = {
		ec_validate_ecdt, "ASUS hardware", {
		DMI_MATCH(DMI_SYS_VENDOR, "ASUSTek Computer Inc."),
		DMI_MATCH(DMI_PRODUCT_NAME, "L4R"),}, NULL},
		{
		ec_clear_on_resume, "Samsung hardware", {
		DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD.")}, NULL},
		{},
		};

drivers/acpi/resource.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -77,18 +77,24 @@ bool acpi_dev_resource_memory(struct acpi_resource ares, struct resource res)
		switch (ares->type) {
		case ACPI_RESOURCE_TYPE_MEMORY24:
		memory24 = &ares->data.memory24;
		if (!memory24->address_length)
		return false;
		acpi_dev_get_memresource(res, memory24->minimum,
		memory24->address_length,
		memory24->write_protect);
		break;
		case ACPI_RESOURCE_TYPE_MEMORY32:
		memory32 = &ares->data.memory32;
		if (!memory32->address_length)
		return false;
		acpi_dev_get_memresource(res, memory32->minimum,
		memory32->address_length,
		memory32->write_protect);
		break;
		case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
		fixed_memory32 = &ares->data.fixed_memory32;
		if (!fixed_memory32->address_length)
		return false;
		acpi_dev_get_memresource(res, fixed_memory32->address,
		fixed_memory32->address_length,
		fixed_memory32->write_protect);
		@@ -144,12 +150,16 @@ bool acpi_dev_resource_io(struct acpi_resource ares, struct resource res)
		switch (ares->type) {
		case ACPI_RESOURCE_TYPE_IO:
		io = &ares->data.io;
		if (!io->address_length)
		return false;
		acpi_dev_get_ioresource(res, io->minimum,
		io->address_length,
		io->io_decode);
		break;
		case ACPI_RESOURCE_TYPE_FIXED_IO:
		fixed_io = &ares->data.fixed_io;
		if (!fixed_io->address_length)
		return false;
		acpi_dev_get_ioresource(res, fixed_io->address,
		fixed_io->address_length,
		ACPI_DECODE_10);

drivers/acpi/sleep.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -807,7 +807,12 @@ int __init acpi_sleep_init(void)
		acpi_sleep_hibernate_setup();

		status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
		if (ACPI_SUCCESS(status)) {
		/*
		* Check both ACPI S5 object and ACPI sleep registers to
		* install pm_power_off_prepare/pm_power_off hook
		*/
		if (ACPI_SUCCESS(status) && acpi_gbl_FADT.sleep_control.address
		&& acpi_gbl_FADT.sleep_status.address) {
		sleep_states[ACPI_STATE_S5] = 1;
		pm_power_off_prepare = acpi_power_off_prepare;
		pm_power_off = acpi_power_off;