linux-kernel - [PATCH] drm/rockchip: vop: add vop power domain support

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Message-Id: <1427867333-2246-1-git-send-email-mark.yao@rock-chips.com>
Date:	Wed,  1 Apr 2015 13:48:53 +0800
From:	Mark Yao <mark.yao@...k-chips.com>
To:	David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
	Rob Clark <robdclark@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Daniel Kurtz <djkurtz@...omium.org>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org
Cc:	Mark Yao <yzq@...k-chips.com>
Subject: [PATCH] drm/rockchip: vop: add vop power domain support

From: Mark Yao <yzq@...k-chips.com>

Reference the power domain incase vop power down when
in use.

Signed-off-by: Mark Yao <yzq@...k-chips.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index d041921..7a61c8e 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -421,6 +421,12 @@ static void vop_enable(struct drm_crtc *crtc)
 	if (vop->is_enabled)
 		return;
 
+	ret = pm_runtime_get_sync(vop->dev);
+	if (ret < 0) {
+		dev_err(vop->dev, "failed to get pm runtime: %d\n", ret);
+		return;
+	}
+
 	ret = clk_enable(vop->hclk);
 	if (ret < 0) {
 		dev_err(vop->dev, "failed to enable hclk - %d\n", ret);
@@ -517,6 +523,7 @@ static void vop_disable(struct drm_crtc *crtc)
 	clk_disable(vop->dclk);
 	clk_disable(vop->aclk);
 	clk_disable(vop->hclk);
+	pm_runtime_put(vop->dev);
 }
 
 /*
-- 
1.7.9.5


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