Eric Lee / smarc-fsl-linux-kernel

18 Oct, 2010

1 commit

18 Aug, 2010

1 commit

  • 56385a12d   ALSA: emu10k1 - delay the PCM interrupts (add pcm_irq_delay parameter) ... Browse Code »

    With some hardware combinations, the PCM interrupts are acknowledged
    before the period boundary from the emu10k1 chip. The midlevel PCM code
    gets confused and the playback stream is interrupted.

    It seems that the interrupt processing shift by 2 samples is enough
    to fix this issue. This default value does not harm other,
    non-affected hardware.

    More information: Kernel bugzilla bug#16300

    [A copmile warning fixed by tiwai]

    Signed-off-by: Jaroslav Kysela
    Cc:
    Signed-off-by: Takashi Iwai

    Jaroslav Kysela
     

27 Mar, 2009

2 commits

  • f9f35677d   emu101k1.h: fix duplicate include of <linux/types.h> ... Browse Code »

    Impact: cleanup

    The earlier patch 'make most exported headers use strict integer
    types' accidentally includes both from the common and
    from the kernel-only parts.

    Signed-off-by: Arnd Bergmann
    Acked-by: Takashi Iwai
    Signed-off-by: H. Peter Anvin
    Signed-off-by: Ingo Molnar

    Arnd Bergmann
     
  • 9adfbfb61   make most exported headers use strict integer types ... Browse Code »

    This takes care of all files that have only a small number
    of non-strict integer type uses.

    Signed-off-by: Arnd Bergmann
    Cc: Mauro Carvalho Chehab
    Cc: David Airlie
    Cc: Arnaldo Carvalho de Melo
    Cc: YOSHIFUJI Hideaki
    Cc: netdev@vger.kernel.org
    Cc: linux-ppp@vger.kernel.org
    Cc: Jaroslav Kysela
    Cc: Takashi Iwai
    Cc: David Woodhouse
    Signed-off-by: H. Peter Anvin
    Signed-off-by: Ingo Molnar

    Arnd Bergmann
     

02 Jun, 2008

1 commit

01 Feb, 2008

5 commits

16 Oct, 2007

5 commits

20 Jul, 2007

1 commit

14 Feb, 2007

1 commit

09 Feb, 2007

7 commits

05 Oct, 2006

1 commit

  • 7d12e780e   IRQ: Maintain regs pointer globally rather than passing to IRQ handlers ... Browse Code »

    Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
    of passing regs around manually through all ~1800 interrupt handlers in the
    Linux kernel.

    The regs pointer is used in few places, but it potentially costs both stack
    space and code to pass it around. On the FRV arch, removing the regs parameter
    from all the genirq function results in a 20% speed up of the IRQ exit path
    (ie: from leaving timer_interrupt() to leaving do_IRQ()).

    Where appropriate, an arch may override the generic storage facility and do
    something different with the variable. On FRV, for instance, the address is
    maintained in GR28 at all times inside the kernel as part of general exception
    handling.

    Having looked over the code, it appears that the parameter may be handed down
    through up to twenty or so layers of functions. Consider a USB character
    device attached to a USB hub, attached to a USB controller that posts its
    interrupts through a cascaded auxiliary interrupt controller. A character
    device driver may want to pass regs to the sysrq handler through the input
    layer which adds another few layers of parameter passing.

    I've build this code with allyesconfig for x86_64 and i386. I've runtested the
    main part of the code on FRV and i386, though I can't test most of the drivers.
    I've also done partial conversion for powerpc and MIPS - these at least compile
    with minimal configurations.

    This will affect all archs. Mostly the changes should be relatively easy.
    Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

    struct pt_regs *old_regs = set_irq_regs(regs);

    And put the old one back at the end:

    set_irq_regs(old_regs);

    Don't pass regs through to generic_handle_irq() or __do_IRQ().

    In timer_interrupt(), this sort of change will be necessary:

    - update_process_times(user_mode(regs));
    - profile_tick(CPU_PROFILING, regs);
    + update_process_times(user_mode(get_irq_regs()));
    + profile_tick(CPU_PROFILING);

    I'd like to move update_process_times()'s use of get_irq_regs() into itself,
    except that i386, alone of the archs, uses something other than user_mode().

    Some notes on the interrupt handling in the drivers:

    (*) input_dev() is now gone entirely. The regs pointer is no longer stored in
    the input_dev struct.

    (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
    something different depending on whether it's been supplied with a regs
    pointer or not.

    (*) Various IRQ handler function pointers have been moved to type
    irq_handler_t.

    Signed-Off-By: David Howells
    (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

    David Howells
     

23 Sep, 2006

1 commit

23 Jun, 2006

1 commit

22 Mar, 2006

1 commit

03 Jan, 2006

4 commits

04 Nov, 2005

1 commit

  • 9529a5bae   [ALSA] emu10k1 - Use 31 bit DMA mask for Audigy ... Browse Code »

    Modules: EMU10K1/EMU10K2 driver

    It appears that either the Audigy DMA engine or the Linux kernel cannot
    handle 32 bit DMA with this device. Problem manifests as noise when
    using more than 2GB of RAM, possibly only on 64 bit machines.

    The OSS driver actually uses a 29 bit DMA mask for both devices, this
    seems like overkill for now.

    Signed-off-by: Lee Revell
    Signed-off-by: Takashi Iwai

    Lee Revell
     

01 Nov, 2005

1 commit

  • d83c671fb   [PATCH] Creative Audigy 2 cardbus: Add IO window wakeup magic ... Browse Code »

    This adds the magic IO wakeup code for the CardBus version of the
    Creative Labs Audigy 2 to the snd-emu10k1 driver.

    Without the magic IO enable sequence, reading from the IO region of the
    card will fail spectacularly, and the machine will hang.

    My next task will be getting the driver to actually play sound without
    distortion.

    Signed-off-by: James Courtier-Dutton

    [ This is a work-in-progress, but since it avoids a total lockup
    if the emu10k module is loaded on a machine with the cardbus
    card inserted, we're better off with it than without it, even
    if sound quality is bad right now ]

    Signed-off-by: Linus Torvalds

    James Courtier-Dutton
     

07 Oct, 2005

1 commit

12 Sep, 2005

1 commit

  • 8cdfd2519   [ALSA] Remove superfluous PCI ID definitions ... Browse Code »

    CS46xx driver,EMU10K1/EMU10K2 driver,PCM Midlevel,Trident driver
    YMFPCI driver,BT87x driver,CMIPCI driver,CS4281 driver
    ENS1370/1+ driver,ES1938 driver,ES1968 driver,Intel8x0 driver
    Intel8x0-modem driver,Maestro3 driver,RME32 driver,RME96 driver
    SonicVibes driver,VIA82xx driver,ALI5451 driver,ICE1712 driver
    ICE1724 driver,NM256 driver,RME HDSP driver,RME9652 driver
    Remove superfluous PCI ID definitions.

    Signed-off-by: Takashi Iwai

    Takashi Iwai
     

30 Aug, 2005

1 commit

  • 67ed4161f   [ALSA] sound - fix .iface field of mixer control elements ... Browse Code »

    Documentation,CS46xx driver,EMU10K1/EMU10K2 driver,AD1848 driver
    SB16/AWE driver,CMIPCI driver,ENS1370/1+ driver,RME32 driver
    RME96 driver,ICE1712 driver,ICE1724 driver,KORG1212 driver
    RME HDSP driver,RME9652 driver
    This patch changes .iface to SNDRV_CTL_ELEM_IFACE_MIXER whre _PCM or
    _HWDEP was used in controls that are not associated with a specific PCM
    (sub)stream or hwdep device, and changes some controls that got
    inconsitent .iface values due to copy+paste errors. Furthermore, it
    makes sure that all control that do use _PCM or _HWDEP use the correct
    number in the .device field.

    Signed-off-by: Clemens Ladisch

    Clemens Ladisch
     

28 Jul, 2005

1 commit

29 May, 2005

2 commits