[Intel-gfx] [PATCH 1/4] drm/i915: Refactor where we display the reason to disable FBC

[Damien Lespiau]

How we log the reason to disable FBC isn't very normalized and we can
store the logic to only display the string once directly in
set_no_fbc_reason() instead of having ifs all over the place.

Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
---
 drivers/gpu/drm/i915/intel_fbc.c | 47 +++++++++++++++++++---------------------
 1 file changed, 22 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 618f7bd..0cad32c 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -463,14 +463,15 @@ void intel_fbc_disable(struct drm_device *dev)
 	dev_priv->fbc.crtc = NULL;
 }
 
-static bool set_no_fbc_reason(struct drm_i915_private *dev_priv,
-			      enum no_fbc_reason reason)
+static void set_no_fbc_reason(struct drm_i915_private *dev_priv,
+			      enum no_fbc_reason reason,
+			      const char *reason_str /* a static string */)
 {
 	if (dev_priv->fbc.no_fbc_reason == reason)
-		return false;
+		return;
 
 	dev_priv->fbc.no_fbc_reason = reason;
-	return true;
+	DRM_DEBUG_KMS("Disabling FBC: %s\n", reason_str);
 }
 
 static struct drm_crtc *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
@@ -490,8 +491,8 @@ static struct drm_crtc *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
 		if (intel_crtc_active(tmp_crtc) &&
 		    to_intel_crtc(tmp_crtc)->primary_enabled) {
 			if (one_pipe_only && crtc) {
-				if (set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES))
-					DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
+				set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES,
+						  "more than one pipe active");
 				return NULL;
 			}
 			crtc = tmp_crtc;
@@ -502,8 +503,7 @@ static struct drm_crtc *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
 	}
 
 	if (!crtc || crtc->primary->fb == NULL) {
-		if (set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT))
-			DRM_DEBUG_KMS("no output, disabling\n");
+		set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT, "no output");
 		return NULL;
 	}
 
@@ -547,14 +547,12 @@ void intel_fbc_update(struct drm_device *dev)
 		i915.enable_fbc = 0;
 
 	if (i915.enable_fbc < 0) {
-		if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT))
-			DRM_DEBUG_KMS("disabled per chip default\n");
+		set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT, "chip default");
 		goto out_disable;
 	}
 
 	if (!i915.enable_fbc || !i915.powersave) {
-		if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
-			DRM_DEBUG_KMS("fbc disabled per module param\n");
+		set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM, "module param");
 		goto out_disable;
 	}
 
@@ -578,9 +576,8 @@ void intel_fbc_update(struct drm_device *dev)
 
 	if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) ||
 	    (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) {
-		if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE))
-			DRM_DEBUG_KMS("mode incompatible with compression, "
-				      "disabling\n");
+		set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE,
+				  "incompatible mode");
 		goto out_disable;
 	}
 
@@ -596,14 +593,14 @@ void intel_fbc_update(struct drm_device *dev)
 	}
 	if (intel_crtc->config->pipe_src_w > max_width ||
 	    intel_crtc->config->pipe_src_h > max_height) {
-		if (set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE))
-			DRM_DEBUG_KMS("mode too large for compression, disabling\n");
+		set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE,
+				  "mode too large");
 		goto out_disable;
 	}
+
 	if ((INTEL_INFO(dev)->gen < 4 || HAS_DDI(dev)) &&
 	    intel_crtc->plane != PLANE_A) {
-		if (set_no_fbc_reason(dev_priv, FBC_BAD_PLANE))
-			DRM_DEBUG_KMS("plane not A, disabling compression\n");
+		set_no_fbc_reason(dev_priv, FBC_BAD_PLANE, "plane not A");
 		goto out_disable;
 	}
 
@@ -612,14 +609,14 @@ void intel_fbc_update(struct drm_device *dev)
 	 */
 	if (obj->tiling_mode != I915_TILING_X ||
 	    obj->fence_reg == I915_FENCE_REG_NONE) {
-		if (set_no_fbc_reason(dev_priv, FBC_NOT_TILED))
-			DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
+		set_no_fbc_reason(dev_priv, FBC_NOT_TILED,
+				  "framebuffer not tiled or fenced");
 		goto out_disable;
 	}
 	if (INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) &&
 	    crtc->primary->state->rotation != BIT(DRM_ROTATE_0)) {
-		if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE))
-			DRM_DEBUG_KMS("Rotation unsupported, disabling\n");
+		set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE,
+				  "rotation unsupported");
 		goto out_disable;
 	}
 
@@ -629,8 +626,8 @@ void intel_fbc_update(struct drm_device *dev)
 
 	if (i915_gem_stolen_setup_compression(dev, obj->base.size,
 					      drm_format_plane_cpp(fb->pixel_format, 0))) {
-		if (set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL))
-			DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
+		set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL,
+				  "no space in stolen memory");
 		goto out_disable;
 	}
 
-- 
1.8.3.1