drm/rockchip: dw_hdmi: Move HDMI vpll clock enable to bind()

The HDMI vpll clock should be enabled when bind() is called. So move the
clk_prepare_enable of that clock to bind() function and add the missing
clk_disable_unprepare() required in error handling path and unbind().

Fixes: 12b9f204e804 ("drm: bridge/dw_hdmi: add rockchip rk3288 support")
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20180302175757.28192-5-enric.balletbo@collabora.com

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 3574b0a..11309a2 100644 (file)
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -165,7 +165,6 @@ static const struct dw_hdmi_phy_config rockchip_phy_config[] = {
 static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi)
 {
        struct device_node *np = hdmi->dev->of_node;
-       int ret;
 
        hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
        if (IS_ERR(hdmi->regmap)) {
@@ -193,13 +192,6 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi)
                return PTR_ERR(hdmi->grf_clk);
        }
 
-       ret = clk_prepare_enable(hdmi->vpll_clk);
-       if (ret) {
-               DRM_DEV_ERROR(hdmi->dev,
-                             "Failed to enable HDMI vpll: %d\n", ret);
-               return ret;
-       }
-
        return 0;
 }
 
@@ -374,6 +366,13 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
                return ret;
        }
 
+       ret = clk_prepare_enable(hdmi->vpll_clk);
+       if (ret) {
+               DRM_DEV_ERROR(hdmi->dev, "Failed to enable HDMI vpll: %d\n",
+                             ret);
+               return ret;
+       }
+
        drm_encoder_helper_add(encoder, &dw_hdmi_rockchip_encoder_helper_funcs);
        drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs,
                         DRM_MODE_ENCODER_TMDS, NULL);
@@ -389,6 +388,7 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
        if (IS_ERR(hdmi->hdmi)) {
                ret = PTR_ERR(hdmi->hdmi);
                drm_encoder_cleanup(encoder);
+               clk_disable_unprepare(hdmi->vpll_clk);
        }
 
        return ret;
@@ -400,6 +400,7 @@ static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
        struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
 
        dw_hdmi_unbind(hdmi->hdmi);
+       clk_disable_unprepare(hdmi->vpll_clk);
 }
 
 static const struct component_ops dw_hdmi_rockchip_ops = {