drm/i915/psr: Fix the delayed vblank w/a

Fix the code to correctly determine whether delayed vblank
is used or not.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230127173044.24108-3-ville.syrjala@linux.intel.com
Reviewed-by: Jouni Högander <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 6d8cf31..93b4e1c 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1178,13 +1178,8 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
         */
        if (IS_MTL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0) ||
            IS_DISPLAY_VER(dev_priv, 12, 13)) {
-               u16 vtotal, vblank;
-
-               vtotal = crtc_state->uapi.adjusted_mode.crtc_vtotal -
-                       crtc_state->uapi.adjusted_mode.crtc_vdisplay;
-               vblank = crtc_state->uapi.adjusted_mode.crtc_vblank_end -
-                       crtc_state->uapi.adjusted_mode.crtc_vblank_start;
-               if (vblank > vtotal)
+               if (crtc_state->hw.adjusted_mode.crtc_vblank_start !=
+                   crtc_state->hw.adjusted_mode.crtc_vdisplay)
                        intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 0,
                                     wa_16013835468_bit_get(intel_dp));
        }