| commit | 2cad7e529ecb87c9b7992b3509e7e5bf5464328c | |
| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | |
| Sun, 13 Dec 2009 19:10:51 +0000 (13 17:10 -0200) | ||
| committer | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | |
| Sun, 13 Dec 2009 19:10:51 +0000 (13 17:10 -0200) | ||
| tree | 87240793f8378b308ad9a9f53c73177840ec703d | treesnapshot (tar.gz zip) |
| parent | 741b8d476b4e32c124008326c48c0f40c0691fa3 | commitdiff |
thinkpad-acpi: volume subdriver rewrite
I don't trust the coupled EC writes and SMI calls the current volume
control code does very much, although it is exactly what the IBM DSDTs
seem to do (they never do more than a single step though).
Change the driver to stop issuing SMIs, and just drive the EC directly
to the desired level (DSDTs seem to confirm this will work even on
very old models like the 570 and 600e/x).
We checkpoint directly to NVRAM (this can be turned off) at
suspend/shutdown/driver unload, which from what I can see in tbp,
should also work on every ThinkPad.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Lorne Applebaum <lorne.applebaum@gmail.com>
Cc: Matthew Garrett <mjg@redhat.com>
I don't trust the coupled EC writes and SMI calls the current volume
control code does very much, although it is exactly what the IBM DSDTs
seem to do (they never do more than a single step though).
Change the driver to stop issuing SMIs, and just drive the EC directly
to the desired level (DSDTs seem to confirm this will work even on
very old models like the 570 and 600e/x).
We checkpoint directly to NVRAM (this can be turned off) at
suspend/shutdown/driver unload, which from what I can see in tbp,
should also work on every ThinkPad.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Lorne Applebaum <lorne.applebaum@gmail.com>
Cc: Matthew Garrett <mjg@redhat.com>
| Documentation/laptops/thinkpad-acpi.txt | diffblobblamehistory | |
| drivers/platform/x86/thinkpad_acpi.c | diffblobblamehistory |