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Subject[PATCH v2 5/7] drm/rockchip: dw_hdmi: add hclk_vio
Date
Add clk hclk_vio and enable it when hdmi bind.

Signed-off-by: Algea Cao <algea.cao@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 7658b2f..e1a9941 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;
}

@@ -506,6 +522,11 @@ 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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