drm/xe/fbdev: Limit the usage of stolen for LNL+

Browse source

As per recommendation in the workarounds:
WA_22019338487

There is an issue with accessing Stolen memory pages due a
hardware limitation. Limit the usage of stolen memory for
fbdev for LNL+. Don't use BIOS FB from stolen on LNL+ and
assign the same from system memory.

v2: Corrected the WA Number, limited WA to LNL and
    Adopted XE_WA framework as suggested by Lucas and Matt.

v3: Introduced the waxxx_display to implement display side
    of WA changes on Lunarlake. Used xe_root_mmio_gt and
    avoid the for loop (Suggested by Lucas)

v4: Fixed some nits (Luca)

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240717082252.3875909-1-uma.shankar@intel.com

...

This commit is contained in:

Uma Shankar 2024-07-17 13:52:52 +05:30

parent 3849c6ff3a

commit 775d0adc01

3 changed files with 12 additions and 1 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

6

drivers/gpu/drm/xe/display/intel_fbdev_fb.c

View file

6

drivers/gpu/drm/xe/display/xe_plane_initial.c

View file

1

drivers/gpu/drm/xe/xe_wa_oob.rules

View file