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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2022-03-09 18:49:41 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2022-03-18 22:36:18 +0200 |
| commit | d8f5855b31c0523ea3b171db8dfb998830e8735d (patch) | |
| tree | 915bced2d7f54e68b8718a7825782b60a0201868 /scripts/stackusage | |
| parent | drm/i915: include uapi/drm/i915_drm.h directly where needed (diff) | |
| download | linux-d8f5855b31c0523ea3b171db8dfb998830e8735d.tar.gz linux-d8f5855b31c0523ea3b171db8dfb998830e8735d.zip | |
drm/i915: Treat SAGV block time 0 as SAGV disabled
For modern platforms the spec explicitly states that a
SAGV block time of zero means that SAGV is not supported.
Let's extend that to all platforms. Supposedly there should
be no systems where this isn't true, and it'll allow us to:
- use the same code regardless of older vs. newer platform
- wm latencies already treat 0 as disabled, so this fits well
with other related code
- make it a bit more clear when SAGV is used vs. not
- avoid overflows from adding U32_MAX with a u16 wm0 latency value
which could cause us to miscalculate the SAGV watermarks on tgl+
Cc: stable@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220309164948.10671-2-ville.syrjala@linux.intel.com
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Diffstat (limited to 'scripts/stackusage')
0 files changed, 0 insertions, 0 deletions