diff mbox series

[SRU,Noble,4/8] drm/i915/alpm: Alpm aux wake configuration for lnl

Message ID 20240416060416.18571-5-hui.wang@canonical.com
State New
Headers show
Series Fix panel flickering issue when i915.psr2 is enabled | expand

Commit Message

Hui Wang April 16, 2024, 6:04 a.m. UTC 
From: Jouni Högander <jouni.hogander@intel.com>

BugLink: https://bugs.launchpad.net/bugs/2046315

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
(cherry picked from commit 449c2d5948ba8c784dcbc5c67df1d8c54748caa4)
Signed-off-by: Hui Wang <hui.wang@canonical.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index ffc8cd9b9940..7bcc8416290d 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1535,6 +1535,21 @@  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)
 {
@@ -1600,6 +1615,8 @@  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