The current HD-audio code manages the DRM audio power via too complex redirections, and this seems even still unbalanced in a corner case as Intel DRM CI has been intermittently reporting. This patch is a big surgery for addressing the complexity and the possible unbalance.
Basically the patch changes the display PM in the following ways:
- Both HD-audio controller and codec drivers call a single helper, snd_hdac_display_power(). (Formerly, the display power control from a codec was done indirectly via link_power bus ops.)
- snd_hdac_display_power() receives the codec address index. For turning on/off from the controller, pass HDA_CODEC_IDX_CONTROLLER.
- snd_hdac_display_power() doesn't manage refcounts any longer, but keeps the power status in bitmap. If any of controller or codecs is turned on, the function updates the DRM power state via get_power() or put_power().
Also this refactor allows us more cleanup:
- The link_power bus ops is dropped, so there is no longer indirect management, as mentioned in the above.
- hdac_device link_power_control flag is moved to hda_codec display_power_control flag, as it's only for HDA legacy.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106525 Signed-off-by: Takashi Iwai tiwai@suse.de --- v1->v2: Define HDA_CODEC_IDX_CONTROLLER with HDA_MAX_CODECS
include/sound/hda_codec.h | 1 + include/sound/hda_component.h | 10 ++++++++-- include/sound/hdaudio.h | 7 ++----- sound/hda/hdac_component.c | 35 +++++++++++++++++++++------------- sound/hda/hdac_device.c | 17 ----------------- sound/pci/hda/hda_codec.c | 16 ++++++++++++---- sound/pci/hda/hda_controller.c | 11 ----------- sound/pci/hda/hda_intel.c | 22 ++++++++------------- sound/pci/hda/patch_hdmi.c | 4 ++-- sound/soc/codecs/hdac_hdmi.c | 7 +++---- sound/soc/intel/skylake/skl.c | 10 +++++----- 11 files changed, 63 insertions(+), 77 deletions(-)
diff --git a/include/sound/hda_codec.h b/include/sound/hda_codec.h index 0d98bb9068b1..7fa48b100936 100644 --- a/include/sound/hda_codec.h +++ b/include/sound/hda_codec.h @@ -236,6 +236,7 @@ struct hda_codec { /* misc flags */ unsigned int in_freeing:1; /* being released */ unsigned int registered:1; /* codec was registered */ + unsigned int display_power_control:1; /* needs display power */ unsigned int spdif_status_reset :1; /* needs to toggle SPDIF for each * status change * (e.g. Realtek codecs) diff --git a/include/sound/hda_component.h b/include/sound/hda_component.h index 78626cde7081..767c8d8a0230 100644 --- a/include/sound/hda_component.h +++ b/include/sound/hda_component.h @@ -5,10 +5,15 @@ #define __SOUND_HDA_COMPONENT_H
#include <drm/drm_audio_component.h> +#include <sound/hdaudio.h> + +/* virtual idx for controller */ +#define HDA_CODEC_IDX_CONTROLLER HDA_MAX_CODECS
#ifdef CONFIG_SND_HDA_COMPONENT int snd_hdac_set_codec_wakeup(struct hdac_bus *bus, bool enable); -int snd_hdac_display_power(struct hdac_bus *bus, bool enable); +int snd_hdac_display_power(struct hdac_bus *bus, unsigned int idx, + bool enable); int snd_hdac_sync_audio_rate(struct hdac_device *codec, hda_nid_t nid, int dev_id, int rate); int snd_hdac_acomp_get_eld(struct hdac_device *codec, hda_nid_t nid, int dev_id, @@ -25,7 +30,8 @@ static inline int snd_hdac_set_codec_wakeup(struct hdac_bus *bus, bool enable) { return 0; } -static inline int snd_hdac_display_power(struct hdac_bus *bus, bool enable) +static inline int snd_hdac_display_power(struct hdac_bus *bus, + unsigned int idx, bool enable) { return 0; } diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index cd1773d0e08f..940e2b282133 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -79,7 +79,6 @@ struct hdac_device {
/* misc flags */ atomic_t in_pm; /* suspend/resume being performed */ - bool link_power_control:1;
/* sysfs */ struct hdac_widget_tree *widgets; @@ -237,8 +236,6 @@ struct hdac_bus_ops { /* get a response from the last command */ int (*get_response)(struct hdac_bus *bus, unsigned int addr, unsigned int *res); - /* control the link power */ - int (*link_power)(struct hdac_bus *bus, bool enable); };
/* @@ -363,7 +360,8 @@ struct hdac_bus {
/* DRM component interface */ struct drm_audio_component *audio_component; - int drm_power_refcount; + long display_power_status; + bool display_power_active;
/* parameters required for enhanced capabilities */ int num_streams; @@ -404,7 +402,6 @@ int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val); int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr, unsigned int *res); int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus); -int snd_hdac_link_power(struct hdac_device *codec, bool enable);
bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset); void snd_hdac_bus_stop_chip(struct hdac_bus *bus); diff --git a/sound/hda/hdac_component.c b/sound/hda/hdac_component.c index 6e46a9c73aed..dd766414436b 100644 --- a/sound/hda/hdac_component.c +++ b/sound/hda/hdac_component.c @@ -54,38 +54,45 @@ EXPORT_SYMBOL_GPL(snd_hdac_set_codec_wakeup); /** * snd_hdac_display_power - Power up / down the power refcount * @bus: HDA core bus + * @idx: HDA codec address, pass HDA_CODEC_IDX_CONTROLLER for controller * @enable: power up or down * - * This function is supposed to be used only by a HD-audio controller - * driver that needs the interaction with graphics driver. + * This function is used by either HD-audio controller or codec driver that + * needs the interaction with graphics driver. * - * This function manages a refcount and calls the get_power() and + * This function updates the power status, and calls the get_power() and * put_power() ops accordingly, toggling the codec wakeup, too. * * Returns zero for success or a negative error code. */ -int snd_hdac_display_power(struct hdac_bus *bus, bool enable) +int snd_hdac_display_power(struct hdac_bus *bus, unsigned int idx, bool enable) { struct drm_audio_component *acomp = bus->audio_component;
- if (!acomp || !acomp->ops) - return -ENODEV; - dev_dbg(bus->dev, "display power %s\n", enable ? "enable" : "disable"); + if (enable) + set_bit(idx, &bus->display_power_status); + else + clear_bit(idx, &bus->display_power_status);
- if (enable) { - if (!bus->drm_power_refcount++) { + if (!acomp || !acomp->ops) + return 0; + + if (bus->display_power_status) { + if (!bus->display_power_active) { if (acomp->ops->get_power) acomp->ops->get_power(acomp->dev); snd_hdac_set_codec_wakeup(bus, true); snd_hdac_set_codec_wakeup(bus, false); + bus->display_power_active = true; } } else { - WARN_ON(!bus->drm_power_refcount); - if (!--bus->drm_power_refcount) + if (bus->display_power_active) { if (acomp->ops->put_power) acomp->ops->put_power(acomp->dev); + bus->display_power_active = false; + } }
return 0; @@ -321,10 +328,12 @@ int snd_hdac_acomp_exit(struct hdac_bus *bus) if (!acomp) return 0;
- WARN_ON(bus->drm_power_refcount); - if (bus->drm_power_refcount > 0 && acomp->ops) + if (WARN_ON(bus->display_power_active) && acomp->ops) acomp->ops->put_power(acomp->dev);
+ bus->display_power_active = false; + bus->display_power_status = 0; + component_master_del(dev, &hdac_component_master_ops);
bus->audio_component = NULL; diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c index dbf02a3a8d2f..95b073ee4b32 100644 --- a/sound/hda/hdac_device.c +++ b/sound/hda/hdac_device.c @@ -622,23 +622,6 @@ int snd_hdac_power_down_pm(struct hdac_device *codec) EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); #endif
-/** - * snd_hdac_link_power - Enable/disable the link power for a codec - * @codec: the codec object - * @bool: enable or disable the link power - */ -int snd_hdac_link_power(struct hdac_device *codec, bool enable) -{ - if (!codec->link_power_control) - return 0; - - if (codec->bus->ops->link_power) - return codec->bus->ops->link_power(codec->bus, enable); - else - return -EINVAL; -} -EXPORT_SYMBOL_GPL(snd_hdac_link_power); - /* codec vendor labels */ struct hda_vendor_id { unsigned int id; diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 0957813939e5..9f8d59e7e89f 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -36,6 +36,7 @@ #include "hda_beep.h" #include "hda_jack.h" #include <sound/hda_hwdep.h> +#include <sound/hda_component.h>
#define codec_in_pm(codec) snd_hdac_is_in_pm(&codec->core) #define hda_codec_is_power_on(codec) snd_hdac_is_power_on(&codec->core) @@ -799,6 +800,13 @@ void snd_hda_codec_cleanup_for_unbind(struct hda_codec *codec) static unsigned int hda_set_power_state(struct hda_codec *codec, unsigned int power_state);
+/* enable/disable display power per codec */ +static void codec_display_power(struct hda_codec *codec, bool enable) +{ + if (codec->display_power_control) + snd_hdac_display_power(&codec->bus->core, codec->addr, enable); +} + /* also called from hda_bind.c */ void snd_hda_codec_register(struct hda_codec *codec) { @@ -806,7 +814,7 @@ void snd_hda_codec_register(struct hda_codec *codec) return; if (device_is_registered(hda_codec_dev(codec))) { snd_hda_register_beep_device(codec); - snd_hdac_link_power(&codec->core, true); + codec_display_power(codec, true); pm_runtime_enable(hda_codec_dev(codec)); /* it was powered up in snd_hda_codec_new(), now all done */ snd_hda_power_down(codec); @@ -834,7 +842,7 @@ static int snd_hda_codec_dev_free(struct snd_device *device)
codec->in_freeing = 1; snd_hdac_device_unregister(&codec->core); - snd_hdac_link_power(&codec->core, false); + codec_display_power(codec, false); put_device(hda_codec_dev(codec)); return 0; } @@ -2926,7 +2934,7 @@ static int hda_codec_runtime_suspend(struct device *dev) (codec_has_clkstop(codec) && codec_has_epss(codec) && (state & AC_PWRST_CLK_STOP_OK))) snd_hdac_codec_link_down(&codec->core); - snd_hdac_link_power(&codec->core, false); + codec_display_power(codec, false); return 0; }
@@ -2934,7 +2942,7 @@ static int hda_codec_runtime_resume(struct device *dev) { struct hda_codec *codec = dev_to_hda_codec(dev);
- snd_hdac_link_power(&codec->core, true); + codec_display_power(codec, true); snd_hdac_codec_link_up(&codec->core); hda_call_codec_resume(codec); pm_runtime_mark_last_busy(dev); diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c index fe2506672a72..532e081f8b8a 100644 --- a/sound/pci/hda/hda_controller.c +++ b/sound/pci/hda/hda_controller.c @@ -989,20 +989,9 @@ static int azx_get_response(struct hdac_bus *bus, unsigned int addr, return azx_rirb_get_response(bus, addr, res); }
-static int azx_link_power(struct hdac_bus *bus, bool enable) -{ - struct azx *chip = bus_to_azx(bus); - - if (chip->ops->link_power) - return chip->ops->link_power(chip, enable); - else - return -EINVAL; -} - static const struct hdac_bus_ops bus_core_ops = { .command = azx_send_cmd, .get_response = azx_get_response, - .link_power = azx_link_power, };
#ifdef CONFIG_SND_HDA_DSP_LOADER diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index cc06a323c817..9f67425d5039 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -667,13 +667,8 @@ static int azx_position_check(struct azx *chip, struct azx_dev *azx_dev) return 0; }
-/* Enable/disable i915 display power for the link */ -static int azx_intel_link_power(struct azx *chip, bool enable) -{ - struct hdac_bus *bus = azx_bus(chip); - - return snd_hdac_display_power(bus, enable); -} +#define display_power(chip, enable) \ + snd_hdac_display_power(azx_bus(chip), HDA_CODEC_IDX_CONTROLLER, enable)
/* * Check whether the current DMA position is acceptable for updating @@ -957,7 +952,7 @@ static void __azx_runtime_suspend(struct azx *chip) azx_clear_irq_pending(chip); if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL) && hda->need_i915_power) - snd_hdac_display_power(azx_bus(chip), false); + display_power(chip, false); }
static void __azx_runtime_resume(struct azx *chip) @@ -968,7 +963,7 @@ static void __azx_runtime_resume(struct azx *chip) int status;
if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) { - snd_hdac_display_power(bus, true); + display_power(chip, true); if (hda->need_i915_power) snd_hdac_i915_set_bclk(bus); } @@ -989,7 +984,7 @@ static void __azx_runtime_resume(struct azx *chip) /* power down again for link-controlled chips */ if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL) && !hda->need_i915_power) - snd_hdac_display_power(bus, false); + display_power(chip, false); }
#ifdef CONFIG_PM_SLEEP @@ -1355,7 +1350,7 @@ static int azx_free(struct azx *chip)
if (chip->driver_caps & AZX_DCAPS_I915_POWERWELL) { if (hda->need_i915_power) - snd_hdac_display_power(bus, false); + display_power(chip, false); } if (chip->driver_caps & AZX_DCAPS_I915_COMPONENT) snd_hdac_i915_exit(bus); @@ -2056,7 +2051,6 @@ static const struct hda_controller_ops pci_hda_ops = { .disable_msi_reset_irq = disable_msi_reset_irq, .pcm_mmap_prepare = pcm_mmap_prepare, .position_check = azx_position_check, - .link_power = azx_intel_link_power, };
static int azx_probe(struct pci_dev *pci, @@ -2239,7 +2233,7 @@ static int azx_probe_continue(struct azx *chip) if (CONTROLLER_IN_GPU(pci)) hda->need_i915_power = 1;
- err = snd_hdac_display_power(bus, true); + err = display_power(chip, true); if (err < 0) { dev_err(chip->card->dev, "Cannot turn on display power on i915\n"); @@ -2295,7 +2289,7 @@ static int azx_probe_continue(struct azx *chip) out_free: if ((chip->driver_caps & AZX_DCAPS_I915_POWERWELL) && !hda->need_i915_power) - snd_hdac_display_power(bus, false); + display_power(chip, false);
i915_power_fail: if (err < 0) diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 67099cbb6be2..30fe4dbdb0ae 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2620,7 +2620,7 @@ static int intel_hsw_common_init(struct hda_codec *codec, hda_nid_t vendor_nid) * can cover the codec power request, and so need not set this flag. */ if (!is_haswell(codec) && !is_broadwell(codec)) - codec->core.link_power_control = 1; + codec->display_power_control = 1;
codec->patch_ops.set_power_state = haswell_set_power_state; codec->depop_delay = 0; @@ -2656,7 +2656,7 @@ static int patch_i915_byt_hdmi(struct hda_codec *codec) /* For Valleyview/Cherryview, only the display codec is in the display * power well and can use link_power ops to request/release the power. */ - codec->core.link_power_control = 1; + codec->display_power_control = 1;
codec->depop_delay = 0; codec->auto_runtime_pm = 1; diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c index e63d6e33df48..c3d551d2af7f 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -2031,14 +2031,13 @@ static int hdac_hdmi_dev_probe(struct hdac_device *hdev) * Turned off in the runtime_suspend during the first explicit * pm_runtime_suspend call. */ - ret = snd_hdac_display_power(hdev->bus, true); + ret = snd_hdac_display_power(hdev->bus, hdev->addr, true); if (ret < 0) { dev_err(&hdev->dev, "Cannot turn on display power on i915 err: %d\n", ret); return ret; } - ret = hdac_hdmi_parse_and_map_nid(hdev, &hdmi_dais, &num_dais); if (ret < 0) { dev_err(&hdev->dev, @@ -2196,7 +2195,7 @@ static int hdac_hdmi_runtime_suspend(struct device *dev)
snd_hdac_ext_bus_link_put(bus, hlink);
- err = snd_hdac_display_power(bus, false); + err = snd_hdac_display_power(bus, hdev->addr, false); if (err < 0) dev_err(dev, "Cannot turn off display power on i915\n");
@@ -2224,7 +2223,7 @@ static int hdac_hdmi_runtime_resume(struct device *dev)
snd_hdac_ext_bus_link_get(bus, hlink);
- err = snd_hdac_display_power(bus, true); + err = snd_hdac_display_power(bus, hdev->addr, true); if (err < 0) { dev_err(dev, "Cannot turn on display power on i915\n"); return err; diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c index 7487f388e65d..64f8433ae921 100644 --- a/sound/soc/intel/skylake/skl.c +++ b/sound/soc/intel/skylake/skl.c @@ -334,7 +334,7 @@ static int skl_suspend(struct device *dev) }
if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) { - ret = snd_hdac_display_power(bus, false); + ret = snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false); if (ret < 0) dev_err(bus->dev, "Cannot turn OFF display power on i915\n"); @@ -353,7 +353,7 @@ static int skl_resume(struct device *dev)
/* Turned OFF in HDMI codec driver after codec reconfiguration */ if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) { - ret = snd_hdac_display_power(bus, true); + ret = snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true); if (ret < 0) { dev_err(bus->dev, "Cannot turn on display power on i915\n"); @@ -783,7 +783,7 @@ static int skl_i915_init(struct hdac_bus *bus) if (err < 0) return err;
- err = snd_hdac_display_power(bus, true); + err = snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true); if (err < 0) dev_err(bus->dev, "Cannot turn on display power on i915\n");
@@ -838,7 +838,7 @@ static void skl_probe_work(struct work_struct *work) snd_hdac_ext_bus_link_put(bus, hlink);
if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) { - err = snd_hdac_display_power(bus, false); + err = snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false); if (err < 0) { dev_err(bus->dev, "Cannot turn off display power on i915\n"); skl_machine_device_unregister(skl); @@ -855,7 +855,7 @@ static void skl_probe_work(struct work_struct *work)
out_err: if (IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)) - err = snd_hdac_display_power(bus, false); + err = snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false); }
/*