From fefee95488412796b293d28c948be6fce63d149b Mon Sep 17 00:00:00 2001 From: Cezary Rojewski Date: Mon, 14 Feb 2022 11:14:01 +0100 Subject: ALSA: hda: Add snd_hdac_ext_bus_link_at() helper This patch exposes a new helper to directly retrieve the link from the codec address, and makes use of this helper when retrieving the link from the codec name. Signed-off-by: Cezary Rojewski Link: https://lore.kernel.org/r/20220214101404.4074026-2-cezary.rojewski@intel.com Signed-off-by: Takashi Iwai --- sound/hda/ext/hdac_ext_controller.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-) (limited to 'sound/hda/ext') diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index b2df7b4f9227..b072392725c7 100644 --- a/sound/hda/ext/hdac_ext_controller.c +++ b/sound/hda/ext/hdac_ext_controller.c @@ -132,6 +132,26 @@ void snd_hdac_link_free_all(struct hdac_bus *bus) } EXPORT_SYMBOL_GPL(snd_hdac_link_free_all); +/** + * snd_hdac_ext_bus_link_at - get link at specified address + * @bus: link's parent bus device + * @addr: codec device address + * + * Returns link object or NULL if matching link is not found. + */ +struct hdac_ext_link *snd_hdac_ext_bus_link_at(struct hdac_bus *bus, int addr) +{ + struct hdac_ext_link *hlink; + int i; + + list_for_each_entry(hlink, &bus->hlink_list, list) + for (i = 0; i < HDA_MAX_CODECS; i++) + if (hlink->lsdiid & (0x1 << addr)) + return hlink; + return NULL; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_at); + /** * snd_hdac_ext_bus_get_link - get link based on codec name * @bus: the pointer to HDAC bus object @@ -140,8 +160,6 @@ EXPORT_SYMBOL_GPL(snd_hdac_link_free_all); struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_bus *bus, const char *codec_name) { - int i; - struct hdac_ext_link *hlink = NULL; int bus_idx, addr; if (sscanf(codec_name, "ehdaudio%dD%d", &bus_idx, &addr) != 2) @@ -151,14 +169,7 @@ struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_bus *bus, if (addr < 0 || addr > 31) return NULL; - list_for_each_entry(hlink, &bus->hlink_list, list) { - for (i = 0; i < HDA_MAX_CODECS; i++) { - if (hlink->lsdiid & (0x1 << addr)) - return hlink; - } - } - - return NULL; + return snd_hdac_ext_bus_link_at(bus, addr); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_link); -- cgit v1.2.3