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drm/xe/reg_sr: Stop setting all whitelist slots

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Currently xe_reg_sr_apply_whitelist() sets the unused values to a known
used value for no good reason: it could just leave it with the HW
default. The behavior is slightly different if there are no whitelist
registers for the engine as the function returns early. This is not
needed, so just drop the addition writes for the unused slots.

Later this will allow to reduce the amount of registers passed to GuC
for save/restore.

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241209232739.147417-5-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
This commit is contained in:
Lucas De Marchi
2024-12-09 15:27:38 -08:00
parent bd022199ce
commit c1151691b5
1 changed files with 0 additions and 7 deletions
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7
drivers/gpu/drm/xe/xe_reg_sr.c
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@@ -227,13 +227,6 @@ void xe_reg_sr_apply_whitelist(struct xe_hw_engine *hwe)
slot++;
}
/* And clear the rest just in case of garbage */
for (; slot < RING_MAX_NONPRIV_SLOTS; slot++) {
u32 addr = RING_NOPID(mmio_base).addr;
xe_mmio_write32(&gt->mmio, RING_FORCE_TO_NONPRIV(mmio_base, slot), addr);
}
xe_force_wake_put(gt_to_fw(gt), fw_ref);
return;