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path: root/sound/usb/mixer_scarlett.c
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2017-02-21ALSA: usb-audio: constify snd_kcontrol_new structuresBhumika Goyal
Declare snd_kcontrol_new structures as const as they are only passed as an argument to the function add_new_ctl. This agrument is of type const, so snd_kcontrol_new structures having this property can be made const too. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-12-18ALSA: usb-audio: Fix Scarlett 6i6 initialization typoChris J Arges
The num_controls field was incorrectly set to 0 causing 6i6 to not be initialized. Set this to 9. Reported-and-tested-by: Mark Roberts <sunifiram@gmail.com> Signed-off-by: Chris J Arges <chris.j.arges@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-21ALSA: usb-audio: Add resume support for Scarlett mixersTakashi Iwai
Scarlett driver uses almost compatible usb_mixer_elem_info struct, so we just need to add a couple of simple resume callbacks to handle them accordingly. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-21ALSA: usb-audio: Allow quirks to handle own resume and proc dumpTakashi Iwai
So far, we blindly assumed that the all usb-audio mixer elements follow the standard and apply the standard resume method for the registered elements in the id_elems[] list. However, some quirks really need the own resume and it's incomplete for now. This patch enhances the resume handling in two folds: - split some fields in struct usb_mixer_elem_info into a smaller header struct (usb_mixer_elem_list) for keeping the minimal information in the linked-list; the usb_mixer_elem_info embeds this header struct instead - add resume and dump callbacks to usb_mixer_elem_list struct to allow quirks providing the own methods For the standard mixer elements, these new callbacks are set to the standard ones as default, thus there is no functional change by this patch yet. The dump and resume callbacks are typedef'ed for ease of later patches using arrays of such function pointers. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-11-13ALSA: usb-audio: Scarlett mixer interface for 6i6, 18i6, 18i8 and 18i20Chris J Arges
This code contains the Scarlett mixer interface code that was originally written by Tobias Hoffman and Robin Gareus. Because the device doesn't properly implement UAC2 this code adds a mixer quirk for the device. Changes from the original code include removing the metering code along with dead code and comments. Compiler warnings were fixed. The code to initialize the sampling rate was causing a crash this was fixed as discussed on the mailing list. Error, and info messages were convered to dev_err and dev_info interfaces. The custom scarlett_mixer_elem_info struct was replaced with the more generic usb_mixer_elem_info to be able to recycle more code from mixer.c. This patch also makes additional modifications based on upstream comments. Individual control creation functions are removed and a generic function is no used. Macros for function calls are removed to improve readability. Hardcoded control initialization is removed. Save to HW functionality has been removed. Strings for enums are created dynamically for the mixer. Strings used for controls are now SNDRV_CTL_ELEM_ID_NAME_MAXLEN length. Signed-off-by: Chris J Arges <chris.j.arges@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>