github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-22 04:34:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/xe/wopcm: fix WOPCM size for LNL+

Browse Source 
Starting on LNL the WOPCM size is 8MB instead of 4, so we need to avoid
using the [0, 8MB) range of the GGTT as that can be unaccessible from
the microcontrollers.

Note that the proper long-term fix here is to read the WOPCM size from
the HW, but that is a more serious rework that would be difficult to
backport, so we can do that as a follow-up.

Fixes: 9c57bc0865 ("drm/xe/lnl: Drop force_probe requirement")
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Shuicheng Lin <shuicheng.lin@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Shuicheng Lin <shuicheng.lin@intel.com>
Link: https://patch.msgid.link/20260713221758.3285744-2-daniele.ceraolospurio@intel.com
This commit is contained in:
Daniele Ceraolo Spurio 2026-07-13 15:17:59 -07:00
parent acc744fa62
commit 3033b0b24e
1 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/gpu/drm/xe/xe_wopcm.c
View File

@ -49,9 +49,9 @@
*/
/* Default WOPCM size is 2MB from Gen11, 1MB on previous platforms */
/* FIXME: Larger size require for 2 tile PVC, do a proper probe sooner or later */
/* FIXME: Larger size require for some platforms, do a proper probe sooner or later */
#define DGFX_WOPCM_SIZE SZ_4M
/* FIXME: Larger size require for MTL, do a proper probe sooner or later */
#define LNL_WOPCM_SIZE SZ_8M
#define MTL_WOPCM_SIZE SZ_4M
#define WOPCM_SIZE SZ_2M
@ -179,9 +179,14 @@ static int __wopcm_init_regs(struct xe_device *xe, struct xe_gt *gt,
u32 xe_wopcm_size(struct xe_device *xe)
{
return IS_DGFX(xe) ? DGFX_WOPCM_SIZE :
xe->info.platform == XE_METEORLAKE ? MTL_WOPCM_SIZE :
WOPCM_SIZE;
if (xe->info.platform >= XE_LUNARLAKE)
return LNL_WOPCM_SIZE;
else if (IS_DGFX(xe))
return DGFX_WOPCM_SIZE;
else if (xe->info.platform == XE_METEORLAKE)
return MTL_WOPCM_SIZE;
else
return WOPCM_SIZE;
}
static u32 max_wopcm_size(struct xe_device *xe)