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drm/xe/stolen: ignore first page for FBC

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We have observed underruns on some platforms if the CFB offset is within
the first page of stolen. Just like i915 skip the first page.

v2 (Maarten)
  - Also align the start.

BSpec: 50214
Reported-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412150301.273344-4-matthew.auld@intel.com
This commit is contained in:
Matthew Auld 2024-04-12 16:03:03 +01:00
parent 9890821f3e
commit 48b1f11c95
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/xe/compat-i915-headers/i915_gem_stolen.h
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@ -19,8 +19,13 @@ static inline int i915_gem_stolen_insert_node_in_range(struct xe_device *xe,
int err;
u32 flags = XE_BO_FLAG_PINNED | XE_BO_FLAG_STOLEN;
if (align)
if (start < SZ_4K)
start = SZ_4K;
if (align) {
size = ALIGN(size, align);
start = ALIGN(start, align);
}
bo = xe_bo_create_locked_range(xe, xe_device_get_root_tile(xe),
NULL, size, start, end,