diff mbox

[08/50] drm/i915: Make switching to the same CRC source a no-op

Message ID 1407203579-24841-9-git-send-email-dheerajx.s.jamwal@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dheeraj Jamwal Aug. 5, 2014, 1:52 a.m. UTC 
From: Damien Lespiau <damien.lespiau@intel.com>

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit cc3da175b0807a3e15f0fb3dad2bc9c7ff071440)

Signed-off-by: Dheeraj Jamwal <dheerajx.s.jamwal@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 58c6fd4..8c750d5 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1804,6 +1804,7 @@  static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
 			       enum intel_pipe_crc_source source)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
 	u32 val;
 
 
@@ -1812,7 +1813,10 @@  static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
 	if (!IS_IVYBRIDGE(dev))
 		return -ENODEV;
 
-	dev_priv->pipe_crc[pipe].source = source;
+	if (pipe_crc->source == source)
+		return 0;
+
+	pipe_crc->source = source;
 
 	switch (source) {
 	case INTEL_PIPE_CRC_SOURCE_PLANE1: