drm/i915/alpm: Alpm aux wake configuration for lnl

Lunarlake has some configurations in ALPM_CTL register for legacy ALPM as
well. Write these.

Bspec: 71477

v2: move version check to lnl_alpm_configure

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240130111130.3298779-5-jouni.hogander@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 7aedda0ca2d285baba75a574a7c5f1845be4e327..72cadad09db5f1ecacf87976a7ba6e0e6e18590f 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1554,6 +1554,21 @@ static void wm_optimization_wa(struct intel_dp *intel_dp,
                             wa_16013835468_bit_get(intel_dp), 0);
 }
 
+static void lnl_alpm_configure(struct intel_dp *intel_dp)
+{
+       struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+       enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
+       struct intel_psr *psr = &intel_dp->psr;
+
+       if (DISPLAY_VER(dev_priv) < 20)
+               return;
+
+       intel_de_write(dev_priv, ALPM_CTL(cpu_transcoder),
+                      ALPM_CTL_EXTENDED_FAST_WAKE_ENABLE |
+                      ALPM_CTL_ALPM_ENTRY_CHECK(psr->alpm_parameters.check_entry_lines) |
+                      ALPM_CTL_EXTENDED_FAST_WAKE_TIME(psr->alpm_parameters.fast_wake_lines));
+}
+
 static void intel_psr_enable_source(struct intel_dp *intel_dp,
                                    const struct intel_crtc_state *crtc_state)
 {
@@ -1619,6 +1634,8 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
                             intel_dp->psr.psr2_sel_fetch_enabled ?
                             IGNORE_PSR2_HW_TRACKING : 0);
 
+       lnl_alpm_configure(intel_dp);
+
        /*
         * Wa_16013835468
         * Wa_14015648006