[PATCH v3 5/6] drm/rockchip: dw_hdmi_qp: Provide ref clock rate in dw_hdmi_qp_plat_data

[Cristian Ciocaltea]

In order to support correct initialization of the timer base in the HDMI
QP IP block, setup platform data to include the required reference clock
rate.

While at it, ensure plat_data is zero-initialized in
dw_hdmi_qp_rockchip_bind().

Signed-off-by: Cristian Ciocaltea <cristian.ciocal...@collabora.com>
---
 drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c 
b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
index 
39b46327afd8e4753d96962fad66792d22b33402..5280383febe25cf579c306ec1642557600595e58
 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
@@ -431,14 +431,15 @@ static int dw_hdmi_qp_rockchip_bind(struct device *dev, 
struct device *master,
                                    void *data)
 {
        struct platform_device *pdev = to_platform_device(dev);
+       struct dw_hdmi_qp_plat_data plat_data = {};
        const struct rockchip_hdmi_qp_cfg *cfg;
-       struct dw_hdmi_qp_plat_data plat_data;
        struct drm_device *drm = data;
        struct drm_connector *connector;
        struct drm_encoder *encoder;
        struct rockchip_hdmi_qp *hdmi;
        struct resource *res;
        struct clk_bulk_data *clks;
+       struct clk *ref_clk;
        int ret, irq, i;
 
        if (!pdev->dev.of_node)
@@ -508,6 +509,14 @@ static int dw_hdmi_qp_rockchip_bind(struct device *dev, 
struct device *master,
        if (ret < 0)
                return dev_err_probe(hdmi->dev, ret, "Failed to get clocks\n");
 
+       ref_clk = clk_get(hdmi->dev, "ref");
+       if (IS_ERR(ref_clk))
+               return dev_err_probe(hdmi->dev, PTR_ERR(ref_clk),
+                                    "Failed to get ref clock\n");
+
+       plat_data.ref_clk_rate = clk_get_rate(ref_clk);
+       clk_put(ref_clk);
+
        hdmi->enable_gpio = devm_gpiod_get_optional(hdmi->dev, "enable",
                                                    GPIOD_OUT_HIGH);
        if (IS_ERR(hdmi->enable_gpio))

-- 
2.50.1