Eric Lee / smarc-fsl-linux-kernel

06 Jan, 2011

1 commit

05 Jan, 2011

1 commit

01 Mar, 2010

2 commits

  • 8edb381d6   vga_switcheroo: fix build on platforms with no ACPI ... Browse Code »

    radeon was always including the atpx code unnecessarily, also core
    switcheroo was including acpi headers.

    Signed-off-by: Dave Airlie

    Dave Airlie
     
  • 6a9ee8af3   vga_switcheroo: initial implementation (v15) ... Browse Code »

    Many new laptops now come with 2 gpus, one to be used for low power
    modes and one for gaming/on-ac applications. These GPUs are typically
    wired to the laptop panel and VGA ports via a multiplexer unit which
    is controlled via ACPI methods.

    4 combinations of systems typically exist - with 2 ACPI methods.
    Intel/ATI - Lenovo W500/T500 - use ATPX ACPI method
    ATI/ATI - some ASUS - use ATPX ACPI Method
    Intel/Nvidia - - use _DSM ACPI method
    Nvidia/Nvidia - - use _DSM ACPI method.

    TODO:
    This patch adds support for the ATPX method and initial bits
    for the _DSM methods that need to written by someone with
    access to the hardware.
    Add a proper non-debugfs interface - need to get some proper
    testing first.

    v2: add power up/down support for both devices
    on W500 puts i915/radeon into D3 and cuts power to radeon.

    v3: redo probing methods, no DMI list, drm devices call to
    register with switcheroo, it tries to find an ATPX method on
    any device and once there is two devices + ATPX it inits the
    switcher.

    v4: ATPX msg handling using buffers - should work on more machines

    v5: rearchitect after more mjg59 discussion - move ATPX handling to
    radeon driver.

    v6: add file headers + initial nouveau bits (to be filled out).

    v7: merge delayed switcher code.

    v8: avoid suspend/resume of gpu that is off

    v9: rearchitect - mjg59 is always right. - move all ATPX code to
    radeon, should allow simpler DSM also proper ATRM handling

    v10: add ATRM support for radeon BIOS, add mutex to lock vgasr_priv

    v11: fix bug in resuming Intel for 2nd time.

    v12: start fixing up nvidia code blindly.

    v13: blindly guess at finishing nvidia code

    v14: remove radeon audio hacks - fix up intel resume more like upstream

    v15: clean up printks + remove unnecessary igd/dis pointers

    mount debugfs

    /sys/kernel/debug/vgaswitcheroo/switch - should exist if ATPX detected
    + 2 cards.

    DIS - immediate change to discrete
    IGD - immediate change to IGD
    DDIS - delayed change to discrete
    DIGD - delayed change to IGD
    ON - turn on not in use
    OFF - turn off not in use

    Tested on W500 (Intel/ATI) and T500 (Intel/ATI)

    Signed-off-by: Dave Airlie

    Dave Airlie