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* ALSA: hda: provide default bus io ops extended hdacVinod Koul2015-06-171-1/+58
| | | | | | | | | A typical io ops use simple io accessors which can be common for most drivers, so provide a default ops which will be used if driver doesn't provide one Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda: add hda link cleanup routineVinod Koul2015-06-171-0/+18
| | | | | | | | | | In HDA extended bus the HDA link objects are created when multilink capabilities are parsed. We need a routine which free up these link objects for a bus. So add snd_hdac_link_free_all routine Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda: add hdac_ext stream creation and cleanup routinesVinod Koul2015-06-171-0/+50
| | | | | | | | | | HDAC extended core should create streams for an extended bus and also free up those on cleanup. So introduce snd_hdac_ext_stream_init_all and snd_hdac_stream_free_all routines Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: HDAC: move SND_HDA_PREALLOC_SIZE to coreVinod Koul2015-06-161-0/+13
| | | | | | | | | Since this is common option for HDA driver to specfiy pre-allocated buffer, we should make this option availble to all HDA driver by moving this to HDA core Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* Merge branch 'for-linus' into for-nextTakashi Iwai2015-06-121-0/+5
|\ | | | | | | | | | | | | | | | | Yet another non-trivial conflicts resolution for the recent HD-audio fix. Conflicts: sound/pci/hda/hda_intel.c Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Re-add the lost fake mute supportTakashi Iwai2015-06-111-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Yet another regression by the transition to regmap cache; for better usability, we had the fake mute control using the zero amp value for Conexant codecs, and this was forgotten in the new hda core code. Since the bits 4-7 are unused for the amp registers (as we follow the syntax of AMP_GET verb), the bit 4 is now used to indicate the fake mute. For setting this flag, snd_hda_codec_amp_update() becomes a function from a simple macro. The bonus is that it gained a proper function description. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hdac_ext: add extended stream capabilitiesJeeja KP2015-06-112-1/+403
| | | | | | | | | | | | | | | | | | | | | | | | | | Now we have the bus and controller code added to find and initialize the extended capabilities. Now we need to use them in stream code to decouple stream, manage links etc So this patch adds the stream handling code for extended capabilities introduced in preceding patches Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hdac_ext: add hdac extended controllerJeeja KP2015-06-112-1/+271
| | | | | | | | | | | | | | | | | | | | The controller needs to support the new capabilities and allow reading, parsing and initializing of these capabilities, so this patch does it Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hdac_ext: add extended HDA busJeeja KP2015-06-114-0/+127
| | | | | | | | | | | | | | | | | | | | | | The new HDA controllers from Intel support new capabilities like multilink, pipe processing, SPIB, GTS etc In order to use them we create an extended HDA bus which embed the hdac bus and contains the fields for extended configurations Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | Merge branch 'for-linus' into for-nextTakashi Iwai2015-06-111-0/+3
|\| | | | | | | | | | | | | | | | | | | This merges and resolves the non-trivial conflicts with the recent fix for hda-i915 binding fallback. Conflicts: sound/pci/hda/hda_intel.c Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Don't actually write registers for caps overwritesTakashi Iwai2015-06-101-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Along with the transition to regmap for managing the cached parameter reads, the caps overwrite was also moved to regmap cache. The cache change itself works, but it still tries to write the non-existing verb (the HDA parameter is read-only) wrongly. It's harmless in most cases, but some chips are picky and may result in the codec communication stall. This patch avoids it just by adding the missing flag check in reg_write ops. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - Allow calling snd_hdac_i915_*() without actual bindingTakashi Iwai2015-06-101-4/+7
| | | | | | | | | | | | | | Add the missing NULL checks so that snd_hdac_i915*() can be called even after the binding with i915 failed. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - add HDA default codec match functionVinod Koul2015-06-031-0/+41
| | | | | | | | | | | | | | | | | | | | HDA codec drivers can be matched using vendor id and revision id typically. So provide a match function which does this and is loaded when driver hasn't provided one (default behaviour) Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - Move hda_i915.c from sound/pci/hda to sound/hdaMengdong Lin2015-05-203-0/+202
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The file is moved to hda core and renamed to hdac_i915.c, so can be used by both legacy HDA driver and new Skylake audio driver. - Add snd_hdac_ prefix to the public APIs. - The i915 audio component is moved to core bus and dynamically allocated. - A static pointer hdac_acomp is used to help bind/unbind callbacks to get this component, because the sound card's private_data is used by the azx chip pointer, which is a legacy structure. It could be removed if private _data changes to some core structure which can be extended to find the bus. - snd_hdac_get_display_clk() is added to get the display core clock for HSW/BDW. - haswell_set_bclk() is moved to hda_intel.c because it needs to write the controller registers EM4/EM5, and only legacy HD-A needs it for HSW/BDW. - Move definition of HSW/BDW-specific registers EM4/EM5 to hda_register.h and rename them to HSW_EM4/HSW_EM5, because other HD-A controllers have different layout for the extended mode registers. Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - Fix NULL dereference from CA0132 DSP loaderTakashi Iwai2015-05-191-3/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | The CA0132 DSP loader leads to NULL deference since the recent transition to HDA core code, as it unconditionally accesses hdac_stream->substream->runtime. For DSP loading, the substream shouldn't be assigned. This patch addresses the NULL dereference above in addition to assure the substream is cleared while DSP loading. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=98151 Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - add hdac stream traceLibin Yang2015-05-182-0/+32
| | | | | | | | | | | | | | Add the trace of snd_hdac_stream_start and snd_hdac_stream_stop. Signed-off-by: Libin Yang <libin.yang@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - allow a codec to control the link powerMengdong Lin2015-04-291-0/+15
| | | | | | | | | | | | | | | | | | A flag "link_power_control" is added to indicate whether a codec needs to control the link power. And a new bus ops link_power() is defined for the codec to request to enable/disable the link power. Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - add generic functions to set hdac stream paramsJeeja KP2015-04-171-0/+38
| | | | | | | | | | | | | | | | | | | | | | This will be used by hda controller driver to setup stream params in prepare. This function will setup the bdl and periods. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - Add missing inclusion of <linux/clocksource.h>Takashi Iwai2015-04-161-0/+1
| | | | | | | | | | | | | | | | | | | | For fixing randconfig build errors like: sound/hda/hdac_stream.c: In function 'azx_timecounter_init': sound/hda/hdac_stream.c:365:2: error: implicit declaration of function 'CLOCKSOURCE_MASK' [-Werror=implicit-function-declaration] Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - Move PCM format and rate handling code to core libraryTakashi Iwai2015-04-161-0/+300
| | | | | | | | Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - moved alloc/free stream pages function to controller libraryJeeja KP2015-04-162-2/+58
| | | | | | | | | | | | | | | | | | | | Moved azx_alloc_stream_pages and azx_free_stream_pages to controller library. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - Add DSP loader to core library codeTakashi Iwai2015-04-162-0/+116
| | | | | | | | | | | | Copied from the legacy driver code, no transition done yet. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - Add the controller helper codes to hda-core moduleTakashi Iwai2015-04-164-3/+1004
|/ | | | | | | | | | | | | | | This patch adds the controller helper codes to hda-core library. The I/O access ops are added to the bus ops. The CORB/RIRB, the basic attributes like irq# and iomap address, some locks and the list of streams are added to the bus object, together with the stream object and its helpers. Currently the codes are just copied from the legacy driver, so you can find duplicated codes in both directories. Only constants are removed from the original hda_controller.h. More integration work will follow in the later patches. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - set GET bit when adding a vendor verb to the codec regmapMengdong Lin2015-04-141-1/+1
| | | | | | | | | | | Some HD-A codecs may add their own vendor 'set' verb to the regmap, thru func snd_hdac_add_vendor_verb(). This patch sets the GET bit (bit 11) when adding the verb so that its peer vendor 'get' verb is actually added. This can avoid I/O error when writing the 'set' verb thru remap, since HD-A regmap internally looks up a writable vendor verb with GET bit set at first. Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Fix another race in runtime PM refcountingTakashi Iwai2015-04-131-0/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | Although some races in runtime PM refcount was fixed by the commit [664c715573c2: ALSA: hda - Work around races of power up/down with runtime PM], there is still a race in the following case: CPU0: CPU1 : runtime suspend: codec->in_pm = 1 snd_hdac_power_up_pm(): pm_runtime_get_sync() skipped suspend finished: codec->in_pm = 0 snd_hdac_power_down_pm(): pm_runtime_put_*() is called! For avoiding this situation, increment in_pm flag atomically when it's non-zero, and decrement accordingly, to ensure that in_pm is set consistently for the whole concurrent operations. Also, since atomic_inc_not_zero() and atomic_dec_if_positive() are lengthy inline functions, move snd_hdac_power_up_pm() and _down_pm() to sound/hda/hdac_device.c as no inline functions. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Expose codec type sysfsTakashi Iwai2015-04-131-0/+2
| | | | | | | | The type field of HD-audio codec object should be exposed to user-space so that it can identify which driver type to bind (legacy / asoc). Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Always allow access for POWER_STATE verbs via regmapTakashi Iwai2015-04-091-5/+5
| | | | | | | | | | | The hdac regmap code checks whether the codec is powered on while accessing, but there must be an exception -- the verbs to control the power state. Currently HD-audio driver doesn't access them via regmap, so this patch doesn't fix any current behavior, but it's just for future. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Work around races of power up/down with runtime PMTakashi Iwai2015-04-082-13/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, snd_hdac_power_up()/down() helpers checks whether the codec is being in pm (suspend/resume), and skips the call of runtime get/put during it. This is needed as there are lots of power up/down sequences called in the paths that are also used in the PM itself. An example is found in hda_codec.c::codec_exec_verb(), where this can power up the codec while it may be called again in its power up sequence, too. The above works in most cases, but sometimes we really want to wait for the real power up. For example, the control element get/put may want explicit power up so that the value change is assured to reach to the hardware. Using the current snd_hdac_power_up(), however, results in a race, e.g. when it's called during the runtime suspend is being performed. In the worst case, as found in patch_ca0132.c, it can even lead to the deadlock because the code assumes the power up while it was skipped due to the check above. For dealing with such cases, this patch makes snd_hdac_power_up() and _down() to two variants: with and without in_pm flag check. The version with pm flag check is named as snd_hdac_power_up_pm() while the version without pm flag check is still kept as snd_hdac_power_up(). (Just because the usage of the former is fewer.) Then finally, the patch replaces each call potentially done in PM with the new _pm() variant. In theory, we can implement a unified version -- if we can distinguish the current context whether it's in the pm path. But such an implementation is cumbersome, so leave the code like this a bit messy way for now... Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=96271 Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Create AFG sysfs node at lastTakashi Iwai2015-04-081-8/+8
| | | | | | | | ... so that user-space can know that the whole nodes have been created. Unfortunately, this can't be implemented easily in race-free way, so it's a kind of compromise. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* Merge branch 'topic/hda-regmap' into for-nextTakashi Iwai2015-04-045-7/+574
|\ | | | | | | | | | | | | | | This merges the support of regmap in HD-audio infrastructure. Many in-house cache codes in HD-audio driver are relaced with the more standard regmap base now. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Set use_single_rw flag for regmapTakashi Iwai2015-03-271-0/+1
| | | | | | | | | | | | | | | | HD-audio doesn't support the bulk access. Currently it works even without this flag as implicitly assumed, but it's safer to set explicitly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Handle a few verbs as read-onlyTakashi Iwai2015-03-261-3/+7
| | | | | | | | | | | | | | | | | | | | Although they can be written, handle a few verbs as read-only in regmap interface: CONFIG_DEFAULT, CONV and CVT_CHAN_COUNT. These are either updated in PCM or HDMI management code in a volatile manner, or just needed only as parameter, thus they don't need to be written at resume sync. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Add cache support for COEF read/writeTakashi Iwai2015-03-231-1/+48
| | | | | | | | | | | | | | | | | | | | | | The 16bit COEF read/write is pretty standard for many codecs, and they can be cached in most cases -- more importantly, they need to be restored at resume. For making this easier, add the cache support to regmap. If the codec driver wants to cache the COEF access, set codec->cache_coef flag and issue AC_VERB_GET_PROC_COEF with the coef index in LSB 8 bits. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Handle get/set power verb symmetrically via regmapTakashi Iwai2015-03-231-1/+12
| | | | | | | | | | | | | | | | | | | | | | | | HD-audio has quite a few asymmetrical ways of accessing verbs, and one of typical ones is GET/SET_POWER_STATE verbs. While it takes only the power state for setting, it returns a combination of states for getting. For making the state handling simpler, this patch adds a code to translate the value returned from GET_POWER_STATE to return only the actual state or -1 for error. In that way, the driver can simplify the power state management. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Add a fake stereo amp register supportTakashi Iwai2015-03-231-1/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | HD-audio spec is inconvenient regarding the handling of stereo volume controls. It can set and get only single channel at once (although there is a special option to set the same value to both channels). This patch provides a fake pseudo-register via the regmap access so that the stereo channels can be read and written by a single call. It'd be useful, for example, for implementing DAPM widgets. A stereo amp pseudo register consists of the encoding like the normal amp verbs but it has both SET_LEFT (bit 13) and SET_RIGHT (bit 12) bits set. The regmap reads and writes a 16bit value for this pseudo register where the upper 8bit is for the right chanel and the lower 8bit for the left channel. Note that the driver doesn't recognize conflicts when both stereo and mono channel registers are mixed. Mixing them would certainly confuse the operation. So, use carefully. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Allow driver to add vendor-specific verbs for regmapTakashi Iwai2015-03-231-0/+28
| | | | | | | | | | | | | | | | | | Codecs may have own vendor-specific verbs, and we need to allow each driver to give such verbs for cached accesses. Here a verb can be put into a single array and looked through it at readable and writeable callbacks. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Use regmap for parameter caches, tooTakashi Iwai2015-03-232-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The amp hash table was used for recording the cached reads of some capability values like pin caps or amp caps. Now all these are moved to regmap as well. One addition to the regmap helper is codec->caps_overwriting flag. This is set in snd_hdac_override_parm(), and the regmap helper accepts any register while this flag is set, so that it can overwrite even the read-only verb like AC_VERB_PARAMETERS. The flag is cleared immediately in snd_hdac_override_parm(), as it's a once-off flag. Along with these changes, the no longer needed amp hash and relevant fields are removed from hda_codec struct now. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Implement uncached version of parameter readsTakashi Iwai2015-03-231-1/+25
| | | | | | | | | | | | | | | | Sometimes we need the uncached reads, e.g. for refreshing the tree. This patch provides the helper function for that and uses it for refreshing widgets, reading subtrees and the whole proc reads. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Use regmap for codec parameter readsTakashi Iwai2015-03-231-12/+9
| | | | | | | | | | | | | | | | Let's start converting the access functions to regmap. The first one is the simplest, just converting the codec parameter read helper function snd_hda_param_read(). Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Add regmap supportTakashi Iwai2015-03-233-1/+306
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds an infrastructure to support regmap-based verb accesses. Because o the asymmetric nature of HD-audio verbs, especially the amp verbs, we need to translate the verbs as a sort of pseudo registers to be mapped uniquely in regmap. In this patch, a pseudo register is built from the NID, the AC_VERB_GET_* and 8bit parameters, i.e. almost in the form to be sent to HD-audio bus but without codec address field. OTOH, for writing, the same pseudo register is translated to AC_VERB_SET_* automatically. The AC_VERB_SET_AMP_* verb is re-encoded from the corresponding AC_VERB_GET_AMP_* verb and parameter at writing. Some verbs has a single command for read but multiple for writes. A write for such a verb is split automatically to multiple verbs. The patch provides also a few handy helper functions. They are designed to be accessible even without regmap. When no regmap is set up (e.g. before the codec device instantiation), the direct hardware access is used. Also, it tries to avoid the unnecessary power-up. The power up/down sequence is performed only on demand. The codec driver needs to call snd_hdac_regmap_exit() and snd_hdac_regmap_exit() at probe and remove if it wants the regmap access. There is one flag added to hdac_device. When the flag lazy_cache is set, regmap helper ignores a write for a suspended device and returns as if it was actually written. It reduces the hardware access pretty much, e.g. when adjusting the mixer volume while in idle. This assumes that the driver will sync the cache later at resume properly, so use it carefully. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Move generic array helpers to core libTakashi Iwai2015-03-232-1/+51
| | | | | | | | | | | | This will be used by the regmap support. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: hda - Fix subsystem ID read regressionDavid Henningsson2015-04-041-1/+1
|/ | | | | | | | | | | | A regression was introduced in 7639a06c23c7d4cda3: if AC_PAR_SUBSYSTEM_ID reads as zero, one should retry using AC_VERB_GET_SUBSYSTEM_ID. This seems to hit many codecs (my own laptop included), and causes quirks for some machines not to apply correctly. Reported-by: TienFu Chen <tienfu.chen@canonical.com> Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Re-add tracepoints to HD-audio core driverTakashi Iwai2015-03-234-1/+77
| | | | | | | | | | Now let's take the basic tracepoints back to the HD-audio driver. The three bus tracepoints, hda_send_cmd, hda_get_response and hda_unsol_event are revived but in a slightly different form. Since we don't assign the card number there, print the bus device name instead. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Fix possible runtime PM refcount unbalanceTakashi Iwai2015-03-231-2/+1
| | | | | | | | | | | When the driver is unloaded before the codec is bound, it still keeps the runtime PM refcount up, and results in the unbalance. This patch covers these cases by introducing a flag indicating the runtime PM initialization and handling the codec registration procedure more properly. It also fixes the missing input beep device as a gratis, too. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Support indirect execution of verbsTakashi Iwai2015-03-231-1/+23
| | | | | | | | | | | Add an overriding exec_verb op to struct hdac_device so that the call via snd_hdac_exec_verb() can switch to a different route depending on the setup. The codec driver sets this field so that it can handle the errors or applying quirks appropriately. Furthermore, this mechanism will be used for smooth transition for the regmap support in later patches. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Add widget sysfs treeTakashi Iwai2015-03-234-1/+444
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes the sysfs files assigned to the codec device on the bus which were formerly identical with hwdep sysfs files. Now it shows only a few core parameter, vendor_id, subsystem_id, revision_id, afg, mfg, vendor_name and chip_name. In addition, now a widget tree is added to the bus device sysfs directory for showing the widget topology and attributes. It's just a flat tree consisting of subdirectories named as the widget NID including various attributes like widget capability bits. The AFG (usually NID 0x01) is always found there, and it contains always amp_in_caps, amp_out_caps and power_caps files. Each of these attributes show a single value. The rest are the widget nodes belonging to that AFG. Note that the child node might not start from 0x02 but from another value like 0x0a. Each child node may contain caps, pin_caps, amp_in_caps, amp_out_caps, power_caps and connections files. The caps (representing the widget capability bits) always contain a value. The rest may contain value(s) if the attribute exists on the node. Only connections file show multiple values while other attributes have zero or one single value. An example of ls -R output is like below: % ls -R /sys/bus/hdaudio/devices/hdaudioC0D0/ /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/: 01/ 04/ 07/ 0a/ 0d/ 10/ 13/ 16/ 19/ 1c/ 1f/ 22/ 02/ 05/ 08/ 0b/ 0e/ 11/ 14/ 17/ 1a/ 1d/ 20/ 23/ 03/ 06/ 09/ 0c/ 0f/ 12/ 15/ 18/ 1b/ 1e/ 21/ /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/01: amp_in_caps amp_out_caps power_caps /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/02: amp_in_caps amp_out_caps caps connections pin_caps pin_cfg power_caps /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/03: ..... Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Move a part of hda_codec stuff into hdac_deviceTakashi Iwai2015-03-233-1/+491
| | | | | | | | | | Now some codes and functionalities of hda_codec struct are moved to hdac_device struct. A few basic attributes like the codec address, vendor ID number, FG numbers, etc are moved to hdac_device, and they are accessed like codec->core.addr. The basic verb exec functions are moved, too. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Move some codes up to hdac_bus structTakashi Iwai2015-03-232-1/+182
| | | | | | | | | | | | A few basic codes for communicating over HD-audio bus are moved to struct hdac_bus now. It has only command and get_response ops in addition to the unsolicited event handling. Note that the codec-side tracing support is disabled temporarily during this transition due to the code shuffling. It will be re-enabled later once when all pieces are settled down. Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: hda - Make snd_hda_bus_type publicTakashi Iwai2015-03-233-0/+47
Define the common hd-audio driver and device types to bind over snd_hda_bus_type publicly. This allows to implement other type of device and driver code over hd-audio bus. Now both struct hda_codec and struct hda_codec_driver inherit these new struct hdac_device and struct hdac_driver, respectively. The bus registration is done in subsys_initcall() to assure it before any other driver registrations. Signed-off-by: Takashi Iwai <tiwai@suse.de>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 18:45:11 +0100