From patchwork Sun Aug 4 09:59:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tim Gardner X-Patchwork-Id: 264507 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 4D9372C008C for ; Sun, 4 Aug 2013 20:00:10 +1000 (EST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1V5v6E-0005U3-33; Sun, 04 Aug 2013 09:59:42 +0000 Received: from mail.tpi.com ([74.45.170.26]) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1V5v69-0005T0-Q9 for kernel-team@lists.ubuntu.com; Sun, 04 Aug 2013 09:59:38 +0000 Received: from salmon.rtg.net (mail.tpi.com [10.0.0.205]) by mail.tpi.com (Postfix) with ESMTP id E0DFA3393A2; Sun, 4 Aug 2013 02:59:36 -0700 (PDT) Received: by salmon.rtg.net (Postfix, from userid 1000) id 897FC22D00; Sun, 4 Aug 2013 03:59:36 -0600 (MDT) From: Tim Gardner To: kernel-team@lists.ubuntu.com Subject: [PATCH 1/3 Raring SRU] ALSA: hda - Add power state filtering Date: Sun, 4 Aug 2013 03:59:27 -0600 Message-Id: <1375610369-16225-1-git-send-email-tim.gardner@canonical.com> X-Mailer: git-send-email 1.7.9.5 Cc: Takashi Iwai X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com From: Takashi Iwai BugLink: http://bugs.launchpad.net/bugs/1183125 Add a hook to struct hda_codec for filtering the target power state of each widget when powering up/down. The current hackish EAPD check is implemented as the default hook pointer, too. This allows codec drivers to implement own power filter. In the upcoming changes, the generic parser will have the better power filter based on the active paths. Signed-off-by: Takashi Iwai (cherry picked from commit 9419ab6b72325e20789a61004cf68dc9e909a009) Signed-off-by: Tim Gardner --- sound/pci/hda/hda_codec.c | 39 +++++++++++++++++++++++++-------------- sound/pci/hda/hda_codec.h | 7 +++++-- sound/pci/hda/patch_conexant.c | 2 +- sound/pci/hda/patch_sigmatel.c | 2 +- 4 files changed, 32 insertions(+), 18 deletions(-) diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index e330933..303c54b 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -1206,6 +1206,8 @@ static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec, static unsigned int hda_set_power_state(struct hda_codec *codec, unsigned int power_state); +static unsigned int default_power_filter(struct hda_codec *codec, hda_nid_t nid, + unsigned int power_state); /** * snd_hda_codec_new - create a HDA codec @@ -1324,6 +1326,7 @@ int snd_hda_codec_new(struct hda_bus *bus, #endif codec->epss = snd_hda_codec_get_supported_ps(codec, fg, AC_PWRST_EPSS); + codec->power_filter = default_power_filter; /* power-up all before initialization */ hda_set_power_state(codec, AC_PWRST_D0); @@ -3521,29 +3524,23 @@ EXPORT_SYMBOL_HDA(snd_hda_sequence_write_cache); #endif /* CONFIG_PM */ void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg, - unsigned int power_state, - bool eapd_workaround) + unsigned int power_state) { hda_nid_t nid = codec->start_nid; int i; for (i = 0; i < codec->num_nodes; i++, nid++) { unsigned int wcaps = get_wcaps(codec, nid); + unsigned int state = power_state; if (!(wcaps & AC_WCAP_POWER)) continue; - /* don't power down the widget if it controls eapd and - * EAPD_BTLENABLE is set. - */ - if (eapd_workaround && power_state == AC_PWRST_D3 && - get_wcaps_type(wcaps) == AC_WID_PIN && - (snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_EAPD)) { - int eapd = snd_hda_codec_read(codec, nid, 0, - AC_VERB_GET_EAPD_BTLENABLE, 0); - if (eapd & 0x02) + if (codec->power_filter) { + state = codec->power_filter(codec, nid, power_state); + if (state != power_state && power_state == AC_PWRST_D3) continue; } snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_POWER_STATE, - power_state); + state); } } EXPORT_SYMBOL_HDA(snd_hda_codec_set_power_to_all); @@ -3590,6 +3587,21 @@ static unsigned int hda_sync_power_state(struct hda_codec *codec, return state; } +/* don't power down the widget if it controls eapd and EAPD_BTLENABLE is set */ +static unsigned int default_power_filter(struct hda_codec *codec, hda_nid_t nid, + unsigned int power_state) +{ + if (power_state == AC_PWRST_D3 && + get_wcaps_type(get_wcaps(codec, nid)) == AC_WID_PIN && + (snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_EAPD)) { + int eapd = snd_hda_codec_read(codec, nid, 0, + AC_VERB_GET_EAPD_BTLENABLE, 0); + if (eapd & 0x02) + return AC_PWRST_D0; + } + return power_state; +} + /* * set power state of the codec, and return the power state */ @@ -3615,8 +3627,7 @@ static unsigned int hda_set_power_state(struct hda_codec *codec, snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE, power_state); - snd_hda_codec_set_power_to_all(codec, fg, power_state, - true); + snd_hda_codec_set_power_to_all(codec, fg, power_state); } state = hda_sync_power_state(codec, fg, power_state); if (!(state & AC_PWRST_ERROR)) diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h index af6259c..fa95d41 100644 --- a/sound/pci/hda/hda_codec.h +++ b/sound/pci/hda/hda_codec.h @@ -882,6 +882,10 @@ struct hda_codec { spinlock_t power_lock; #endif + /* filter the requested power state per nid */ + unsigned int (*power_filter)(struct hda_codec *codec, hda_nid_t nid, + unsigned int power_state); + /* codec-specific additional proc output */ void (*proc_widget_hook)(struct snd_info_buffer *buffer, struct hda_codec *codec, hda_nid_t nid); @@ -1038,8 +1042,7 @@ extern const struct snd_pcm_chmap_elem snd_pcm_2_1_chmaps[]; void snd_hda_get_codec_name(struct hda_codec *codec, char *name, int namelen); void snd_hda_bus_reboot_notify(struct hda_bus *bus); void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg, - unsigned int power_state, - bool eapd_workaround); + unsigned int power_state); int snd_hda_lock_devices(struct hda_bus *bus); void snd_hda_unlock_devices(struct hda_bus *bus); diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c index 09fae16..0eea727 100644 --- a/sound/pci/hda/patch_conexant.c +++ b/sound/pci/hda/patch_conexant.c @@ -435,7 +435,7 @@ static void conexant_set_power(struct hda_codec *codec, hda_nid_t fg, /* partial workaround for "azx_get_response timeout" */ if (power_state == AC_PWRST_D0) msleep(10); - snd_hda_codec_set_power_to_all(codec, fg, power_state, true); + snd_hda_codec_set_power_to_all(codec, fg, power_state); } static int conexant_init(struct hda_codec *codec) diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c index a86547c..4b6cffe 100644 --- a/sound/pci/hda/patch_sigmatel.c +++ b/sound/pci/hda/patch_sigmatel.c @@ -5110,7 +5110,7 @@ static void stac92xx_set_power_state(struct hda_codec *codec, hda_nid_t fg, } snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE, afg_power_state); - snd_hda_codec_set_power_to_all(codec, fg, power_state, true); + snd_hda_codec_set_power_to_all(codec, fg, power_state); } #else #define stac92xx_suspend NULL