drm/i915/alpm: Add new interface to check if AUXLess ALPM is used

we need to know if AUXLess ALPM is used when preparing for link
training. Add new interface for this and use it in existing code where
possible.

v2: remove kerneldoc comment

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://lore.kernel.org/r/20250526120512.1702815-8-jouni.hogander@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c
index 0890247085a7a6897c465266d1e94215e3f90fd1..bbcf510b0c254afabeb616c8698b7492c8a3b7e1 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -26,6 +26,13 @@ bool intel_alpm_aux_less_wake_supported(struct intel_dp *intel_dp)
        return intel_dp->alpm_dpcd & DP_ALPM_AUX_LESS_CAP;
 }
 
+bool intel_alpm_is_alpm_aux_less(struct intel_dp *intel_dp,
+                                const struct intel_crtc_state *crtc_state)
+{
+       return intel_psr_needs_alpm_aux_less(intel_dp, crtc_state) ||
+               (crtc_state->has_lobf && intel_alpm_aux_less_wake_supported(intel_dp));
+}
+
 void intel_alpm_init(struct intel_dp *intel_dp)
 {
        u8 dpcd;
@@ -341,8 +348,7 @@ static void lnl_alpm_configure(struct intel_dp *intel_dp,
         * Panel Replay on eDP is always using ALPM aux less. I.e. no need to
         * check panel support at this point.
         */
-       if ((crtc_state->has_panel_replay && intel_dp_is_edp(intel_dp)) ||
-           (crtc_state->has_lobf && intel_alpm_aux_less_wake_supported(intel_dp))) {
+       if (intel_alpm_is_alpm_aux_less(intel_dp, crtc_state)) {
                alpm_ctl = ALPM_CTL_ALPM_ENABLE |
                        ALPM_CTL_ALPM_AUX_LESS_ENABLE |
                        ALPM_CTL_AUX_LESS_SLEEP_HOLD_TIME_50_SYMBOLS |

diff --git a/drivers/gpu/drm/i915/display/intel_alpm.h b/drivers/gpu/drm/i915/display/intel_alpm.h
index c9fe21e3e72cee3561eccb30fab8f676161dbdd9..86f4d5ab1981b0f6ef92962cc55d64775be0a764 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_alpm.h
+++ b/drivers/gpu/drm/i915/display/intel_alpm.h
@@ -32,6 +32,8 @@ void intel_alpm_post_plane_update(struct intel_atomic_state *state,
 void intel_alpm_lobf_debugfs_add(struct intel_connector *connector);
 bool intel_alpm_aux_wake_supported(struct intel_dp *intel_dp);
 bool intel_alpm_aux_less_wake_supported(struct intel_dp *intel_dp);
+bool intel_alpm_is_alpm_aux_less(struct intel_dp *intel_dp,
+                                const struct intel_crtc_state *crtc_state);
 void intel_alpm_disable(struct intel_dp *intel_dp);
 bool intel_alpm_get_error(struct intel_dp *intel_dp);
 #endif