linux-kernel - [PATCH 21/36] drm/tegra: dc: Do not needlessly deassert reset

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Message-Id: <1421750935-4023-22-git-send-email-thierry.reding@gmail.com>
Date:	Tue, 20 Jan 2015 11:48:40 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	dri-devel@...ts.freedesktop.org
Cc:	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 21/36] drm/tegra: dc: Do not needlessly deassert reset

From: Thierry Reding <treding@...dia.com>

Commit 9c0127004ff4 ("drm/tegra: dc: Add powergate support") changed the
driver's ->probe() implementation to deassert the module reset, and with
there being nobody else to assert it until ->remove() there is no need
to deassert again later on.

Signed-off-by: Thierry Reding <treding@...dia.com>
---
 drivers/gpu/drm/tegra/dc.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 462945abded2..846daf48cf61 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -1160,10 +1160,6 @@ static void tegra_crtc_prepare(struct drm_crtc *crtc)
 
 	drm_crtc_vblank_off(crtc);
 
-	/* hardware initialization */
-	reset_control_deassert(dc->rst);
-	usleep_range(10000, 20000);
-
 	if (dc->pipe)
 		syncpt = SYNCPT_VBLANK1;
 	else
-- 
2.1.3

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