[PATCH 3/5] drm/i915/alpm: Allow LOBF only for platform that have Always on VRR TG

[Ankit Nautiyal <ankit.k.nautiyal@intel.com>]

As per bspec the LOBF is allowed when running in fixed refresh rate mode
i.e. when flipline = vmin = vmax. Apparently this means we can allow
LOBF only when VRR timing generator is running in fixed refresh rate
mode.

Use the check intel_vrr_always_use_vrr_tg() to avoid LOBF with legacy
timing generator. Also use intel_vrr_is_fixed_rr() to check for fixed
refresh rate mode.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_alpm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c
index 686e4d13f864..5cfb9345776a 100644
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -344,8 +344,8 @@ void intel_alpm_lobf_compute_config(struct intel_dp *intel_dp,
 	if (crtc_state->has_psr)
 		return;
 
-	if (crtc_state->vrr.vmin != crtc_state->vrr.vmax ||
-	    crtc_state->vrr.vmin != crtc_state->vrr.flipline)
+	if (!intel_vrr_always_use_vrr_tg(display) ||
+	    !intel_vrr_is_fixed_rr(crtc_state))
 		return;
 
 	if (!(intel_alpm_aux_wake_supported(intel_dp) ||
-- 
2.45.2