[PATCH v6 13/26] drm/i915/psr: Check vblank against IO buffer wake time on Lunarlake

[Jouni Högander]

As Lunarlake doesn't have block count configuration vblank should be
checked against IO buffer wake time.

Bspec: 68920

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 471b60032304..c9fcb25184ee 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1246,9 +1246,13 @@ static int intel_psr_entry_setup_frames(struct intel_dp *intel_dp,
 static bool vblank_length_valid(struct intel_dp *intel_dp,
 				const struct intel_crtc_state *crtc_state)
 {
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	int vblank = crtc_state->hw.adjusted_mode.crtc_vblank_end -
 		crtc_state->hw.adjusted_mode.crtc_vblank_start;
-	int wake_lines = psr2_block_count_lines(intel_dp);
+	int wake_lines;
+
+	wake_lines = DISPLAY_VER(i915) < 20 ? psr2_block_count_lines(intel_dp) :
+		intel_dp->alpm_parameters.io_wake_lines;
 
 	if (crtc_state->req_psr2_sdp_prior_scanline)
 		vblank -= 1;
-- 
2.34.1