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

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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
This commit is contained in:
Jouni Högander
2025-05-29 08:13:41 +03:00
parent e6503d10ca
commit 5d9d4feb33
2 changed files with 10 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/i915/display/intel_alpm.c
+8 -2
View File
@@ -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 |
drivers/gpu/drm/i915/display/intel_alpm.h
+2
View File
@@ -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