]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/commit - drivers/gpu/drm/i915/intel_pm.c
drm/i915: Improve watermark dirtyness checks
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Fri, 11 Oct 2013 16:39:52 +0000 (19:39 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Tue, 15 Oct 2013 17:00:51 +0000 (19:00 +0200)
commit49a687c471396d063bb3d3cf04d62568efe7ec5e
tree83e76b551cb445068212f8a451ddd860a8b3d20c
parent609cedef6a9d5d90574903c71e81bd1c1f311f06
drm/i915: Improve watermark dirtyness checks

Currently hsw_write_vm_values() may write to certain watermark
registers needlessly. For instance if only, say, LP3 changes,
the current code will again disable all LP1+ watermarks even
though only LP3 needs to be reconfigured.

Add an easy to read function that will compute the dirtyness of the
watermarks, and use that information to further optimize the watermark
programming.

v2: Disable LP1+ watermarks around changing LP0 watermarks for Paulo

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_pm.c