[PATCH 09/18] drm/i915: Extract intel_mode_vblank_delay()

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Extract the code that computes the hardware centric view
of the vblank delay into a helper. We;ll need a slightly
different variant for VRR soon.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsb.c    | 3 +--
 drivers/gpu/drm/i915/display/intel_vblank.c | 8 ++++++--
 drivers/gpu/drm/i915/display/intel_vblank.h | 1 +
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c
index fcb8bf9cb313..d755825edb35 100644
--- a/drivers/gpu/drm/i915/display/intel_dsb.c
+++ b/drivers/gpu/drm/i915/display/intel_dsb.c
@@ -130,8 +130,7 @@ pre_commit_crtc_state(struct intel_atomic_state *state,
 
 static int dsb_vblank_delay(const struct intel_crtc_state *crtc_state)
 {
-	return intel_mode_vblank_start(&crtc_state->hw.adjusted_mode) -
-		intel_mode_vdisplay(&crtc_state->hw.adjusted_mode);
+	return intel_mode_vblank_delay(&crtc_state->hw.adjusted_mode);
 }
 
 static int dsb_vtotal(struct intel_atomic_state *state,
diff --git a/drivers/gpu/drm/i915/display/intel_vblank.c b/drivers/gpu/drm/i915/display/intel_vblank.c
index 6f0e0c64187d..ee33a49d9873 100644
--- a/drivers/gpu/drm/i915/display/intel_vblank.c
+++ b/drivers/gpu/drm/i915/display/intel_vblank.c
@@ -597,6 +597,11 @@ int intel_mode_vtotal(const struct drm_display_mode *mode)
 	return vtotal;
 }
 
+int intel_mode_vblank_delay(const struct drm_display_mode *mode)
+{
+	return intel_mode_vblank_start(mode) - intel_mode_vdisplay(mode);
+}
+
 void intel_vblank_evade_init(const struct intel_crtc_state *old_crtc_state,
 			     const struct intel_crtc_state *new_crtc_state,
 			     struct intel_vblank_evade_ctx *evade)
@@ -653,8 +658,7 @@ void intel_vblank_evade_init(const struct intel_crtc_state *old_crtc_state,
 	 */
 	if (intel_color_uses_dsb(new_crtc_state) ||
 	    new_crtc_state->update_m_n || new_crtc_state->update_lrr)
-		evade->min -= intel_mode_vblank_start(adjusted_mode) -
-			intel_mode_vdisplay(adjusted_mode);
+		evade->min -= intel_mode_vblank_delay(adjusted_mode);
 }
 
 /* must be called with vblank interrupt already enabled! */
diff --git a/drivers/gpu/drm/i915/display/intel_vblank.h b/drivers/gpu/drm/i915/display/intel_vblank.h
index 6d7336256982..12c8e1f829a4 100644
--- a/drivers/gpu/drm/i915/display/intel_vblank.h
+++ b/drivers/gpu/drm/i915/display/intel_vblank.h
@@ -24,6 +24,7 @@ int intel_mode_vdisplay(const struct drm_display_mode *mode);
 int intel_mode_vblank_start(const struct drm_display_mode *mode);
 int intel_mode_vblank_end(const struct drm_display_mode *mode);
 int intel_mode_vtotal(const struct drm_display_mode *mode);
+int intel_mode_vblank_delay(const struct drm_display_mode *mode);
 
 void intel_vblank_evade_init(const struct intel_crtc_state *old_crtc_state,
 			     const struct intel_crtc_state *new_crtc_state,
-- 
2.45.2