795614dde4
This patch can improve power saving for Intel platforms on which only the display audio codec is in the shared i915 power well: - Add a flag "need_i915_power" to indicate whether the controller needs the i915 power well. - The driver will always request the i915 power when probing the controller and codecs if AZX_DCAPS_I915_POWERWELL is set (either the controller or a codec needs this power). - If the controller needs the i915 power, the power will be held after probe until the controller is runtime suspended or S3. If the controller doesn't need the power, the power will be released the after probe, and a codec that needs the power can request/release the power via bus link_power ops. Background: - For Haswell/Broadwell, which has a separate HD-A controller for display audio, both the controller and the display codec are in the i915 power well. - For Baytrail/Braswell, the display and analog audio share the same HDA controller and link, and only the display codec is in the i915 power well. - For Skylake, the display and analog audio share the same HDA controller but use separate links. Only the display codec is in the i915 power well. And in legacy mode we take the two links as one. So it can follow Baytrail/Braswell. Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __SOUND_HDA_INTEL_H
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#define __SOUND_HDA_INTEL_H
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#include <drm/i915_component.h>
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#include "hda_controller.h"
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struct hda_intel {
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struct azx chip;
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/* for pending irqs */
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struct work_struct irq_pending_work;
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/* sync probing */
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struct completion probe_wait;
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struct work_struct probe_work;
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/* card list (for power_save trigger) */
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struct list_head list;
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/* extra flags */
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unsigned int irq_pending_warned:1;
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unsigned int probe_continued:1;
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/* VGA-switcheroo setup */
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unsigned int use_vga_switcheroo:1;
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unsigned int vga_switcheroo_registered:1;
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unsigned int init_failed:1; /* delayed init failed */
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/* secondary power domain for hdmi audio under vga device */
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struct dev_pm_domain hdmi_pm_domain;
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/* i915 component interface */
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bool need_i915_power:1; /* the hda controller needs i915 power */
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struct i915_audio_component audio_component;
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int i915_power_refcount;
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};
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#ifdef CONFIG_SND_HDA_I915
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int hda_display_power(struct hda_intel *hda, bool enable);
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void haswell_set_bclk(struct hda_intel *hda);
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int hda_i915_init(struct hda_intel *hda);
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int hda_i915_exit(struct hda_intel *hda);
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#else
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static inline int hda_display_power(struct hda_intel *hda, bool enable)
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{
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return 0;
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}
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static inline void haswell_set_bclk(struct hda_intel *hda) { return; }
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static inline int hda_i915_init(struct hda_intel *hda)
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{
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return -ENODEV;
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}
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static inline int hda_i915_exit(struct hda_intel *hda)
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{
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return 0;
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}
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#endif
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#endif
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