[PATCH 8/9] drm/i915: HSW+ FBC is tied to pipe A

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

So add code to consider this case.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_fbc.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 7829c21..0d1c75d 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -444,10 +444,16 @@ static bool set_no_fbc_reason(struct drm_i915_private *dev_priv,
 
 static struct drm_crtc *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
 {
-	struct drm_device *dev = dev_priv->dev;
 	struct drm_crtc *crtc = NULL, *tmp_crtc;
+	enum pipe pipe;
+	bool pipe_a_only = false;
+
+	if (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8)
+		pipe_a_only = true;
+
+	for_each_pipe(dev_priv, pipe) {
+		tmp_crtc = dev_priv->pipe_to_crtc_mapping[pipe];
 
-	for_each_crtc(dev, tmp_crtc) {
 		if (intel_crtc_active(tmp_crtc) &&
 		    to_intel_crtc(tmp_crtc)->primary_enabled) {
 			if (crtc) {
@@ -457,6 +463,9 @@ static struct drm_crtc *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
 			}
 			crtc = tmp_crtc;
 		}
+
+		if (pipe_a_only)
+			break;
 	}
 
 	if (!crtc || crtc->primary->fb == NULL) {
@@ -712,11 +721,14 @@ void intel_fbc_init(struct drm_i915_private *dev_priv)
 		return;
 	}
 
-	/* TODO: some platforms have FBC tied to a specific plane! */
-	for_each_pipe(dev_priv, pipe)
+	for_each_pipe(dev_priv, pipe) {
 		dev_priv->fbc.possible_framebuffer_bits |=
 				INTEL_FRONTBUFFER_PRIMARY(pipe);
 
+		if (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8)
+			break;
+	}
+
 	if (INTEL_INFO(dev_priv)->gen >= 7) {
 		dev_priv->display.fbc_enabled = ilk_fbc_enabled;
 		dev_priv->display.enable_fbc = gen7_fbc_enable;
-- 
2.1.4

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