[PATCH v4 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().

Reviewed-by: Daniel Stone <daniels at collabora.com>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea at 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 9191a74a568fb38c2b2ff7ead1e703b3af9addc9..931343b072adc05877db9ae867e31a3cd1134e6c 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
@@ -429,14 +429,15 @@ 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)
@@ -506,6 +507,14 @@ 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))

-- 
2.51.0