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drm/i915: Fix WARN_ON condition for cursor plane ddb allocation

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In some cases like latency[level]==0, wm[level].res_lines>31,
min_ddb_alloc can be U16_MAX, exclude it from the WARN_ON.

v2: Specify the cases in which we hit U16_MAX, indentation (Ville)

Fixes: 10a7e07b68 ("drm/i915: Make sure cursor has enough ddb for the selected wm level")
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191216080619.10945-1-vandita.kulkarni@intel.com
(cherry picked from commit 4ba487019d)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Vandita Kulkarni 2019-12-16 13:36:19 +05:30 committed by Joonas Lahtinen
parent 5665a1febf
commit d55157f6aa
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/intel_pm.c
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@ -4291,8 +4291,8 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *crtc_state,
&crtc_state->wm.skl.optimal.planes[plane_id];
if (plane_id == PLANE_CURSOR) {
if (WARN_ON(wm->wm[level].min_ddb_alloc >
total[PLANE_CURSOR])) {
if (wm->wm[level].min_ddb_alloc > total[PLANE_CURSOR]) {
WARN_ON(wm->wm[level].min_ddb_alloc != U16_MAX);
blocks = U32_MAX;
break;
}