kernel/linux.git/drivers/acpi/ec.c, branch linux-2.6.22.yLinux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=linux-2.6.22.y2007-05-10T07:52:22+00:00acpi,msi-laptop: Fall back to EC polling mode for MSI laptop specific EC commands2007-05-10T07:52:22+00:00Lennart Poetteringmzxreary@0pointer.de2007-05-04T12:16:19+00:00urn:sha1:00eb43a1897a8845d0edb198cec69ac5f1f299dd
The ACPI EC that is used in MSI laptops knows some non-standard
commands for changing the screen brighntess and a few other things,
which are used by the msi-laptop.c driver. Unfortunately for these
commands no GPE events for IBF and OBF are triggered. Since nowadays
the EC code uses the ec_intr=1 mode by default, this causes these
operations to timeout, although they don't fail. In result, all
operations that you can do with the msi-laptop.c driver take more or
less 1s to complete, which is awfully slow.
In one of the more recent kernels (2.6.20?) the EC subsystem has been
revamped. With that change the EC timeout has been increased. before
that increase the MSI EC accesses were slow -- but not *that* slow,
hence I took notice of this limitation of the MSI EC hardware only very
recently.
The standard EC operations on the MSI EC as defined in the ACPI spec
support GPE events properly.
The following patch adds a new argument "force_poll" to the
ec_transaction() function (and friends). If set to 1, the function
will poll for IBF/OBF even if ec_intr=1 is enabled. If set to 0 the
current behaviour is used. The msi-laptop driver is modified to make
use of this new flag, so that OBF/IBF is polled for the special MSI EC
transactions -- but only for them.
Signed-off-by: Lennart Poettering <mzxreary@0pointer.de>
Acked-by: Alexey Starikovskiy <aystarik@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: Block queries until EC is fully initialized2007-03-10T04:27:29+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:9fd9f8e8bdcfc9aa309dae5bccc55d02804337d0
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: Cleanup of EC initialization2007-03-10T04:27:29+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:01f2246269639f6aa93086719a8dbec26cb68e98
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: first_ec is better to be acpi_ec than acpi_device.2007-03-10T04:27:28+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:d033879c9838b960014e861d0eb3bdf11d3b9d9d
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: Rename ec_ecdt to more informative boot_ec2007-03-10T04:27:28+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:d66d969df88c742494736ed06eeaf3229d3a7259
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: Clean ECDT and namespace parsing.2007-03-10T04:27:28+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:c0900c3512dc8fd0b37f8fbcebc7853ed9efff10
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: Put install handlers into separate function.2007-03-10T04:27:28+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:e8284321048aac7be307b3ec5e0631f5c514935a
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: Remove casts to/from void* from ec.c2007-03-10T04:27:28+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:3d02b90be2c7bc7ffbc5e502a135c13838d23ef4
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: enable burst functionality in EC.2007-03-10T04:27:28+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:c45aac43fec2d6ca8d0be8408f94e8176c8110ef
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: EC: "Fake ECDT" workaround is not needed any longer.2007-03-10T04:27:28+00:00Alexey Starikovskiyalexey.y.starikovskiy@intel.com2007-03-07T19:28:00+00:00urn:sha1:33c7a0738c5f753a7d94fd3b2ec7d84e79a141a8
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>