Found a system were firmware/BIOS left the plane_res_b and plane_res_l
set with non-zero values for disable planes.
As the planes are disabled i915 will not even try to sanitize it so
here returning earlier if both skl_wm_levels being compared are
disabled, if that is true no need to check the other fields as HW
will ignore it.
Signed-off-by: José Roberto de Souza <jose.so...@intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 8cc67f9c4e58..c630dc10c34b 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5633,6 +5633,8 @@ void skl_write_cursor_wm(struct intel_plane *plane,
bool skl_wm_level_equals(const struct skl_wm_level *l1,
const struct skl_wm_level *l2)
{
+ if (l1->plane_en == false && l2->plane_en == false)
+ return true;
return l1->plane_en == l2->plane_en &&
l1->ignore_lines == l2->ignore_lines &&
l1->plane_res_l == l2->plane_res_l &&
--
2.30.1
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