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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-06-24 22:10:30 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-08-29 14:54:03 +0300 |
| commit | 44378f6ef2efee3ccfa87de5860662f2356bdde8 (patch) | |
| tree | bd70823935a7f8e3e5cdc6444a707978282bc007 /drivers/gpu/drm/amd/amdgpu/amdgpu_aca.c | |
| parent | 51e039542b87cb649d50ea3b5cf90847be32a30b (diff) | |
drm/i915/dsb: Clear DSB_ENABLE_DEWAKE once the DSB is done
In order to avoid the DSB keeping the DEwake permanently
asserted we must clear DSB_PMCTRL_2.DSB_FORCE_DEWAKE once
we are done. For good measure do the same for
DSB_PMCTRL.DSB_ENABLE_DEWAKE.
Experimentally this doens't seem to be actually necessary
(unlike with DSB_FORCE_DEWAKE). That is, the DSB_ENABLE_DEWAKE
doesn't seem to do anything whenever the DSB is not active.
But I'd hate to waste a ton of power in case there I'm wrong
and there is some way DEwake could remaing asserted. One extra
register write is a small price to pay for some peace of mind.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240624191032.27333-13-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_aca.c')
0 files changed, 0 insertions, 0 deletions