drm/i915: Ignore minimum lines for level 0 in skl_compute_plane_wm, v2.

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According to bspec, result_lines > 31 is only a maximum for latency
level 1 through 7.

For level 0 the number of lines is ignored, so always write 0 there
to prevent overflowing the 5 bits value.

This is required to make NV12 work.

Changes since v1:
- Rebase on top of GEN11 wm changes. It seems to use res_lines for
  level 0 limit calculations, but still doesn't appear to program it.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20180205105841.31634-1-maarten.lankhorst@linux.intel.com

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This commit is contained in:

Maarten Lankhorst 2018-02-05 11:58:41 +01:00

parent fd10e2ce99

commit 31dade7df4

1 changed files with 4 additions and 2 deletions

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drivers/gpu/drm/i915/intel_pm.c

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