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

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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
(cherry picked from commit 3033b0b24e)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
This commit is contained in:
Daniele Ceraolo Spurio 2026-07-13 15:17:59 -07:00 committed by Thomas Hellström
parent 56441f9e08
commit ad87e2476b
1 changed files with 10 additions and 5 deletions
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15
drivers/gpu/drm/xe/xe_wopcm.c
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@ -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)