drm/amd/display: Add fallback to prefetch mode 1 if 0 fails

Browse source

[Why]
In some cases, prefetch mode 0 is unsupported but prefetch 1 is
supported. Due to previous change always forcing prefetch mode to 0, we
are failing bandwidth validation in cases where we should not.

[How]
By default try prefetch mode 0 but in the case validation fails, attempt
to do prefetch mode 1 to see if it is supported.

Signed-off-by: Isabel Zhang <isabel.zhang@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Isabel Zhang 2020-10-21 14:01:26 -04:00 • committed by Alex Deucher

parent 8301f6b990

commit 103cd0b129

2 changed files with 23 additions and 7 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

28

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c

View file

2

drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c

View file