[PATCH 5/8] drm/rockchip: dw_hdmi: add hclk_vio

[Algea Cao]

Add clk hclk_vio and enable it when hdmi bind.

Signed-off-by: Algea Cao <algea....@rock-chips.com>
---
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c 
b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 35b466b..ab44e13 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -61,6 +61,7 @@ struct rockchip_hdmi {
        enum dw_hdmi_devtype dev_type;
        struct clk *vpll_clk;
        struct clk *grf_clk;
+       struct clk *hclk_vio;
        struct phy *phy;
 };
 
@@ -277,12 +278,27 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi 
*hdmi)
                return PTR_ERR(hdmi->grf_clk);
        }
 
+       hdmi->hclk_vio = devm_clk_get(hdmi->dev, "hclk_vio");
+       if (PTR_ERR(hdmi->hclk_vio) == -ENOENT) {
+               hdmi->hclk_vio = NULL;
+       } else if (PTR_ERR(hdmi->hclk_vio) == -EPROBE_DEFER) {
+               return -EPROBE_DEFER;
+       } else if (IS_ERR(hdmi->hclk_vio)) {
+               dev_dbg(hdmi->dev, "failed to get hclk_vio clock\n");
+               return PTR_ERR(hdmi->hclk_vio);
+       }
        ret = clk_prepare_enable(hdmi->vpll_clk);
        if (ret) {
                dev_err(hdmi->dev, "Failed to enable HDMI vpll: %d\n", ret);
                return ret;
        }
 
+       ret = clk_prepare_enable(hdmi->hclk_vio);
+       if (ret) {
+               dev_dbg(hdmi->dev, "Failed to eanble HDMI hclk_vio: %d\n",
+                       ret);
+               return ret;
+       }
        return 0;
 }
 
@@ -507,6 +523,11 @@ static int dw_hdmi_rockchip_bind(struct device *dev, 
struct device *master,
 static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
                                    void *data)
 {
+       struct rockchip_hdmi *hdmi = container_of(&dev, struct rockchip_hdmi,
+                                                 dev);
+
+       clk_disable_unprepare(hdmi->hclk_vio);
+
        return dw_hdmi_unbind(dev);
 }
 
-- 
2.7.4


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