Multiple CI tests fails with forcewake ack timeouts if render power gating is enabled. BSpec 52698 states it should be 0 for MTL, but apparently this info is outdated. Anyway since the patch makes MTL pass basic tests added FIXME tag informing this is temporary workaround.
v2: added FIXME tag Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/4983 Signed-off-by: Andrzej Hajda <[email protected]> Reviewed-by: Nirmoy Das <[email protected]> Reviewed-by: Rodrigo Vivi <[email protected]> Reviewed-by: Andi Shyti <[email protected]> --- Changes in v2: - added FIXME tag - Link to v1: https://lore.kernel.org/r/[email protected] --- drivers/gpu/drm/i915/gt/intel_rc6.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_rc6.c b/drivers/gpu/drm/i915/gt/intel_rc6.c index 908a3d0f2343f4..58bb1c55294c93 100644 --- a/drivers/gpu/drm/i915/gt/intel_rc6.c +++ b/drivers/gpu/drm/i915/gt/intel_rc6.c @@ -117,8 +117,14 @@ static void gen11_rc6_enable(struct intel_rc6 *rc6) GEN6_RC_CTL_RC6_ENABLE | GEN6_RC_CTL_EI_MODE(1); - /* Wa_16011777198 - Render powergating must remain disabled */ - if (IS_DG2_GRAPHICS_STEP(gt->i915, G10, STEP_A0, STEP_C0) || + /* + * Wa_16011777198 and BSpec 52698 - Render powergating must be off. + * FIXME BSpec is outdated, disabling powergating for MTL is just + * temporary wa and should be removed after fixing real cause + * of forcewake timeouts. + */ + if (IS_METEORLAKE(gt->i915) || + IS_DG2_GRAPHICS_STEP(gt->i915, G10, STEP_A0, STEP_C0) || IS_DG2_GRAPHICS_STEP(gt->i915, G11, STEP_A0, STEP_B0)) pg_enable = GEN9_MEDIA_PG_ENABLE | --- base-commit: 641646b29337c97681e0edb67ad2e08aef3fb850 change-id: 20230517-mtl_disable_render_pg-b9f9f1567f9e Best regards, -- Andrzej Hajda <[email protected]>
