From c5b0c09b8fa3e02d9cbfd9445fb4114becdd3390 Mon Sep 17 00:00:00 2001 From: Jeeja KP Date: Fri, 21 Aug 2015 21:36:18 +0530 Subject: [PATCH] ALSA: hdac: Add snd_hdac_ext_bus_link_power_down_all() New HDA controllers like Skylake sport multiple HDA links, so we need a helper to turn off all the links in one go while suspending the device so add snd_hdac_ext_bus_link_power_down_all() API Signed-off-by: Jeeja KP Signed-off-by: Vinod Koul Signed-off-by: Takashi Iwai --- include/sound/hdaudio_ext.h | 1 + sound/hda/ext/hdac_ext_controller.c | 20 ++++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h index 55e2fc3..160160d 100644 --- a/include/sound/hdaudio_ext.h +++ b/include/sound/hdaudio_ext.h @@ -116,6 +116,7 @@ struct hdac_ext_link { int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link); int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link); +int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus); void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link, int stream); void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link, diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index d3bb112..63215b1 100644 --- a/sound/hda/ext/hdac_ext_controller.c +++ b/sound/hda/ext/hdac_ext_controller.c @@ -280,3 +280,23 @@ int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link) return check_hdac_link_power_active(link, false); } EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down); + +/** + * snd_hdac_ext_bus_link_power_down_all -power down all hda link + * @ebus: HD-audio extended bus + */ +int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus) +{ + struct hdac_ext_link *hlink = NULL; + int ret; + + list_for_each_entry(hlink, &ebus->hlink_list, list) { + snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, AZX_MLCTL_SPA, 0); + ret = check_hdac_link_power_active(hlink, false); + if (ret < 0) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down_all); -- 2.7.4