[PATCH v1 05/10] video: tegra20: dc: get DSI/HDMI clock parent if internal DSI/HDMI is used

[Svyatoslav Ryhel]

If device uses native Tegra DSI or HDMI, DC clock MUST use the same
parent as DSI/HDMI clock uses. Hence remove need in device tree
configuration and satisfy this condition by default.

Signed-off-by: Svyatoslav Ryhel <clamor95 at gmail.com>
---
 drivers/video/tegra20/tegra-dc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/video/tegra20/tegra-dc.c b/drivers/video/tegra20/tegra-dc.c
index 775043bb1fe..904d0d205f6 100644
--- a/drivers/video/tegra20/tegra-dc.c
+++ b/drivers/video/tegra20/tegra-dc.c
@@ -524,6 +524,13 @@ exit:
 		return ret;
 	}
 
+	priv->clk_parent = devm_clk_get(priv->bridge, "parent");
+	if (IS_ERR(priv->clk_parent)) {
+		log_debug("%s: Could not get DC clock parent from DSI/HDMI: %ld\n",
+			  __func__, PTR_ERR(priv->clk_parent));
+		return PTR_ERR(priv->clk_parent);
+	}
+
 	dc_plat = dev_get_plat(priv->bridge);
 
 	/* Fill the platform data for internal devices */
-- 
2.43.0