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

[Mark Yao]

From: Mark Yao <y...@rock-chips.com>

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

Signed-off-by: Mark Yao <yzq at rock-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