drm/i915/fbc: Introduce intel_fbc_is_compressing()

Move the direct FBC status register reads from the debugfs code
behind an abstract api.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211104144520.22605-5-ville.syrjala@linux.intel.comAcked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>

drivers/gpu/drm/i915/display/intel_display_debugfs.c

@@ -52,27 +52,12 @@ static int i915_fbc_status(struct seq_file *m, void *unused)
 	wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
 	mutex_lock(&fbc->lock);
 
-	if (intel_fbc_is_active(dev_priv))
+	if (intel_fbc_is_active(dev_priv)) {
 		seq_puts(m, "FBC enabled\n");
-	else
+		seq_printf(m, "Compressing: %s\n",
+			   yesno(intel_fbc_is_compressing(dev_priv)));
+	} else {
 		seq_printf(m, "FBC disabled: %s\n", fbc->no_fbc_reason);
-
-	if (intel_fbc_is_active(dev_priv)) {
-		u32 mask;
-
-		if (DISPLAY_VER(dev_priv) >= 8)
-			mask = intel_de_read(dev_priv, IVB_FBC_STATUS2) & BDW_FBC_COMP_SEG_MASK;
-		else if (DISPLAY_VER(dev_priv) >= 7)
-			mask = intel_de_read(dev_priv, IVB_FBC_STATUS2) & IVB_FBC_COMP_SEG_MASK;
-		else if (DISPLAY_VER(dev_priv) >= 5)
-			mask = intel_de_read(dev_priv, ILK_DPFC_STATUS) & ILK_DPFC_COMP_SEG_MASK;
-		else if (IS_G4X(dev_priv))
-			mask = intel_de_read(dev_priv, DPFC_STATUS) & DPFC_COMP_SEG_MASK;
-		else
-			mask = intel_de_read(dev_priv, FBC_STATUS) &
-				(FBC_STAT_COMPRESSING | FBC_STAT_COMPRESSED);
-
-		seq_printf(m, "Compressing: %s\n", yesno(mask));
 	}
 
 	mutex_unlock(&fbc->lock);

drivers/gpu/drm/i915/display/intel_fbc.c

@@ -211,6 +211,12 @@ static bool i8xx_fbc_is_active(struct drm_i915_private *dev_priv)
 	return intel_de_read(dev_priv, FBC_CONTROL) & FBC_CTL_EN;
 }
 
+static bool i8xx_fbc_is_compressing(struct drm_i915_private *i915)
+{
+	return intel_de_read(i915, FBC_STATUS) &
+		(FBC_STAT_COMPRESSING | FBC_STAT_COMPRESSED);
+}
+
 static u32 g4x_dpfc_ctl_limit(struct drm_i915_private *i915)
 {
 	switch (i915->fbc.limit) {
@@ -262,6 +268,11 @@ static bool g4x_fbc_is_active(struct drm_i915_private *dev_priv)
 	return intel_de_read(dev_priv, DPFC_CONTROL) & DPFC_CTL_EN;
 }
 
+static bool g4x_fbc_is_compressing(struct drm_i915_private *i915)
+{
+	return intel_de_read(i915, DPFC_STATUS) & DPFC_COMP_SEG_MASK;
+}
+
 static void i8xx_fbc_recompress(struct drm_i915_private *dev_priv)
 {
 	struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
@@ -358,6 +369,11 @@ static bool ilk_fbc_is_active(struct drm_i915_private *dev_priv)
 	return intel_de_read(dev_priv, ILK_DPFC_CONTROL) & DPFC_CTL_EN;
 }
 
+static bool ilk_fbc_is_compressing(struct drm_i915_private *i915)
+{
+	return intel_de_read(i915, ILK_DPFC_STATUS) & ILK_DPFC_COMP_SEG_MASK;
+}
+
 static void glk_fbc_program_cfb_stride(struct drm_i915_private *i915)
 {
 	struct intel_fbc *fbc = &i915->fbc;
@@ -416,6 +432,14 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 	intel_de_write(dev_priv, ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
 }
 
+static bool gen7_fbc_is_compressing(struct drm_i915_private *i915)
+{
+	if (DISPLAY_VER(i915) >= 8)
+		return intel_de_read(i915, IVB_FBC_STATUS2) & BDW_FBC_COMP_SEG_MASK;
+	else
+		return intel_de_read(i915, IVB_FBC_STATUS2) & IVB_FBC_COMP_SEG_MASK;
+}
+
 static bool intel_fbc_hw_is_active(struct drm_i915_private *dev_priv)
 {
 	if (DISPLAY_VER(dev_priv) >= 5)
@@ -461,6 +485,18 @@ static void intel_fbc_hw_deactivate(struct drm_i915_private *dev_priv)
 		i8xx_fbc_deactivate(dev_priv);
 }
 
+bool intel_fbc_is_compressing(struct drm_i915_private *i915)
+{
+	if (DISPLAY_VER(i915) >= 7)
+		return gen7_fbc_is_compressing(i915);
+	else if (DISPLAY_VER(i915) >= 5)
+		return ilk_fbc_is_compressing(i915);
+	else if (IS_G4X(i915))
+		return g4x_fbc_is_compressing(i915);
+	else
+		return i8xx_fbc_is_compressing(i915);
+}
+
 /**
  * intel_fbc_is_active - Is FBC active?
  * @dev_priv: i915 device instance

drivers/gpu/drm/i915/display/intel_fbc.h

@@ -19,6 +19,7 @@ struct intel_plane_state;
 void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv,
 			   struct intel_atomic_state *state);
 bool intel_fbc_is_active(struct drm_i915_private *dev_priv);
+bool intel_fbc_is_compressing(struct drm_i915_private *dev_priv);
 bool intel_fbc_pre_update(struct intel_atomic_state *state,
 			  struct intel_crtc *crtc);
 void intel_fbc_post_update(struct intel_atomic_state *state,