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| author | Kai Vehmanen <kai.vehmanen@linux.intel.com> | 2021-02-05 19:46:30 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-02-08 15:57:08 +0100 |
| commit | c99fafdfccd75cb9bd91666a23ae022232afa3d5 (patch) | |
| tree | 7fc52d276e4a580e62a0daf1b988eb44f0de5fd4 /sound/soc/sof/intel/hda.h | |
| parent | ASoC: SOF: Intel: hda: use hdac_ext fine-grained link management (diff) | |
| download | linux-c99fafdfccd75cb9bd91666a23ae022232afa3d5.tar.xz linux-c99fafdfccd75cb9bd91666a23ae022232afa3d5.zip | |
ASoC: SOF: Intel: hda: release display power at link_power
The i915 display power is requested both by controller (for init
and link reset) as well as by codec driver (for codec control).
There's an additional constraint that on some platforms frequent changes
to display power state may cause visible flicker. To avoid this, the SOF
hda controller requests display power whenever it is active and only
releases it when runtime suspended.
This patch utilizes the new hdac_bus link_power op to plug
into HDA link state changes. By monitoring link state changes,
we can keep the controller side display power wakeref until
the codec driver has completed its work, and only release
the wakeref when codec driver is suspended.
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210205184630.1938761-4-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/soc/sof/intel/hda.h')
| -rw-r--r-- | sound/soc/sof/intel/hda.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/soc/sof/intel/hda.h b/sound/soc/sof/intel/hda.h index a3b6f3e9121c..1d9b38e6ed40 100644 --- a/sound/soc/sof/intel/hda.h +++ b/sound/soc/sof/intel/hda.h @@ -388,7 +388,8 @@ #define SSP_SET_SFRM_SLAVE BIT(24) #define SSP_SET_SLAVE (SSP_SET_SCLK_SLAVE | SSP_SET_SFRM_SLAVE) -#define HDA_IDISP_CODEC(x) ((x) & BIT(2)) +#define HDA_IDISP_ADDR 2 +#define HDA_IDISP_CODEC(x) ((x) & BIT(HDA_IDISP_ADDR)) struct sof_intel_dsp_bdl { __le32 addr_l; |