Now it's quite common that an SoC contains its on-chip internal RAM.
By using this RAM space for DMA buffer during audio playback/record,
we can shutdown the voltage for external RAM to save power.

So add new DEV type with iram malloc()/free() and accordingly modify
current default mmap() for the iram circumstance.
Signed-off-by: Nicolin Chen <b42378@freescale.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

... which was introduced by the previous commit a4e9a38b, causing
build errors without CONFIG_PROC_FS.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

This patch adds codec ID (0x80862882) and module alias for
Valleyview2 display codec.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

At the moment, this driver supports only playback, while FFADO supports
(only) full-duplex devices.  So, prevent conflicts by not claiming
devices that would be better handled by FFADO.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

While most DICE devices keep TCAT's default category ID of 0x04, Weiss
devices identify themselves with 0x00.
Reported-by: Rolf Anderegg <rolf.anderegg@weiss.ch>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Remove a wrong typecast that resulted from a copy-and-paste error.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Doing accesses without quadlet alignment is a bad idea because the
firmware's byte-swapping would garble the data; clarify this in the
documentation.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

For easier debugging, add a proc file to show the device's capabilities
and current status.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Output a warning if the wait for the clock change notification times
out.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Instead of relying of some control panel application to configure some
fixed sample rate, allow applications to set it automatically.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

In preparation for sample rate selection support, read the stream
parameters that might change when running at different sample rates.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Reorganize the initialization order so that the driver can receive
notifications earlier.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

In preparation for sample rate selection support, ensure that the driver
knows about the device's clock capabilities.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Avoid a lock inversion between dice->mutex and pcm->open_mutex.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

The pcm field was not actually used.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Since commit f2b3614c (Don't check DMA time-out too shortly), we
need no longer to restrict the period length to less than 10 s.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

When a bus reset happens, the enable register is automatically cleared,
so we do not need to clear it manually when stopping the stream.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Add a flag to snd_fw_transaction() to allow it to abort when a bus reset
happens.  This removes most of the duplicated error handling loops that
were required around calls to the low-level fw_run_transaction().

Also add a flag to suppress error messages; errors are expected when we
attempt to clean up after the device was unplugged.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Instead of reading two consecutive register with two quadlet requests,
use one block read request.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Change the AMDTP streaming code to handle the non-standard stream format
that DICE devices use at sample rates greater than 96 kHz.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

DICE devices do not have a unique specifier ID in their unit directory
(it's always the same as the device vendor's ID), so rely on just the
version ID for driver loading, and use a heuristic in the probe callback
to detect actual DICE devices.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Move the DICE interface symbols into a separate header file, and add
more documentation.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Introduce the helper function amdtp_out_stream_running().  This makes
many checks in amdtp.c clearer and frees the device drivers from having
to track this with a separate variable.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Ensure that misbehaving or aborted userspace programs do not
accidentally keep the lock.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Implement the hwdep locking and notification mechanisms.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

When aborting a PCM stream, the xrun is signaled only if the stream is
running.  When disconnecting a PCM stream, calling snd_card_disconnect()
too early would change the stream into a non-running state and thus
prevent the xrun from being noticed by user space.

To prevent this, move the snd_card_disconnect() call after the xrun.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Allow AMDTP output streams to use blocking mode.

Use it for DICE devices, because the old DICE-II chip will in some cases
not be able to lock to non-blocking streams (erratum E7).
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

The notification bits are not of general interest; log them only when
debugging.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Instead of forcing a constant 44.1 kHz, read the current sample rate
from the device when opening the PCM device.

Actually changing the sample rate requires some separate controller
application.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

After a bus reset, do not stop the stream completely to avoid having to
reconfigure the device when restarting the stream.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Partially restructures _snd_emu10k1_audigy_init_efx() and
_snd_emu10k1_init_efx() functions.

Be noted that the cast is demanded to use '__user'. So, in these cases,
avoid patches based on the coccinelle 'drop_kmalloc_cast' semantic patch.
Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

As a start point for further development, this is an incomplete driver
for DICE devices:
- only playback (so no clock source except the bus clock)
- only 44.1 kHz
- no MIDI
- recovery after bus reset is slow
- hwdep device is created, but not actually implemented

Contains compilation fixes by Stefan Richter.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

Since the lock is used primarily in patch_hdmi.c, it's better to move
it in the local struct instead of exporting in hda_eld.  The only
functions requiring the lock in hda_eld.c are proc accessors.  So in
this patch, the proc entry and its creation/deletion/accessors are
moved into patch_hdmi.c, together with the mutex lock to pin_spec
struct.

The former proc info functions are exported so that they can be called
from patch_hdmi.c.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Some per_pin fields and ELD contents might be changed dynamically in
multiple ways where the concurrent accesses are still opened in the
current code.  This patch fixes such possible races by using eld->lock
in appropriate places.
Reported-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

The zero-length connection list happens so often on Haswell HDMI, and
it results in warning messages like
    ALSA: hda_codec: invalid CONNECT_LIST verb 5[1]:0
at each time the codec resumes from the power-save, which is fairly
annoying.

Since this is no real error, make it shown only in the verbose debug
mode.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

A fixup which should be called before codec being freed will come
to use in the next patch.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

The LEDs are currently not visible to userspace, for security
reasons. They are exported through thinkpad_acpi.h for use by the
snd-hda-intel driver.

Thanks to Alex Hung <alex.hung@canonical.com> and Takashi Iwai
<tiwai@suse.de> for writing parts of this patch.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Takashi Iwai <tiwai@suse.de>