From: Thierry Reding <treding@nvidia.com>
Date: Tue, 7 Oct 2014 14:26:24 +0000 (+0200)
Subject: drm/tegra: Do not enable output on .mode_set()
X-Git-Tag: firefly_0821_release~176^2~2672^2~61^2~32
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=dc670e49e75d63174b838fd9e3405f481e50ab19;p=firefly-linux-kernel-4.4.55.git

drm/tegra: Do not enable output on .mode_set()

The output is already enabled in .dpms(), doing it in .mode_set() too
can cause noticeable flicker.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---

diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
index 0c67d7eebc94..6b393cfbb5e7 100644
--- a/drivers/gpu/drm/tegra/output.c
+++ b/drivers/gpu/drm/tegra/output.c
@@ -167,12 +167,6 @@ static void tegra_encoder_mode_set(struct drm_encoder *encoder,
 				   struct drm_display_mode *mode,
 				   struct drm_display_mode *adjusted)
 {
-	struct tegra_output *output = encoder_to_output(encoder);
-	int err;
-
-	err = tegra_output_enable(output);
-	if (err < 0)
-		dev_err(encoder->dev->dev, "tegra_output_enable(): %d\n", err);
 }
 
 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {