drm/i915/dsb: Don't use indexed writes when byte enables are not all set
The indexed write instruction doesn't support byte-enables, so if the non-indexed write used those we must not convert it to an indexed write. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230606191504.18099-8-ville.syrjala@linux.intel.comReviewed-by: Animesh Manna <animesh.manna@intel.com>
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