drm/i195: Make the async flip VT-d workaround dynamic

Browse source

Since the VT-d vs. async flip issues are plaguing a wider range
of supported hw let's try to minimize the impact on normal
operation by flipping the relevant chicken bits on and off
as needed. I presume there is some power/perf impact on since
this is reducing some prefetching I think.

Cc: Karthik B S <karthik.b.s@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210930190943.17547-2-ville.syrjala@linux.intel.com
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>

...

This commit is contained in:

Ville Syrjälä 2021-09-30 22:09:43 +03:00

parent d08df3b0bd

commit 7d396cacae

2 changed files with 35 additions and 26 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

35

drivers/gpu/drm/i915/display/intel_display.c

View file

26

drivers/gpu/drm/i915/intel_pm.c

View file