From 6fcab6a2b02d9bf5f951b1e6e01f1781499e131d Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Fri, 22 Apr 2022 09:28:21 +0200
Subject: drm/rockchip: dw_hdmi: rename vpll clock to reference clock
Git-commit: a9d37e684492ab5db1cce28b655e20c01191873f
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

"vpll" is a misnomer. A clock input to a device should be named after
the usage in the device, not after the clock that drives it. On the
rk3568 the same clock is driven by the HPLL.
To fix that, this patch renames the vpll clock to ref clock. The clock
name "vpll" is left for compatibility to old device trees.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Michael Riesch <michael.riesch@wolfvision.net>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220422072841.2206452-5-s.hauer@pengutronix.de
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 27 +++++++++++----------
 1 file changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 06c9ddef6f36..912181429880 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -69,7 +69,7 @@ struct rockchip_hdmi {
 	struct regmap *regmap;
 	struct rockchip_encoder encoder;
 	const struct rockchip_hdmi_chip_data *chip_data;
-	struct clk *vpll_clk;
+	struct clk *ref_clk;
 	struct clk *grf_clk;
 	struct dw_hdmi *hdmi;
 	struct phy *phy;
@@ -201,14 +201,15 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi)
 		return PTR_ERR(hdmi->regmap);
 	}
 
-	hdmi->vpll_clk = devm_clk_get(hdmi->dev, "vpll");
-	if (PTR_ERR(hdmi->vpll_clk) == -ENOENT) {
-		hdmi->vpll_clk = NULL;
-	} else if (PTR_ERR(hdmi->vpll_clk) == -EPROBE_DEFER) {
+	hdmi->ref_clk = devm_clk_get_optional(hdmi->dev, "ref");
+	if (!hdmi->ref_clk)
+		hdmi->ref_clk = devm_clk_get_optional(hdmi->dev, "vpll");
+
+	if (PTR_ERR(hdmi->ref_clk) == -EPROBE_DEFER) {
 		return -EPROBE_DEFER;
-	} else if (IS_ERR(hdmi->vpll_clk)) {
-		DRM_DEV_ERROR(hdmi->dev, "failed to get vpll clock\n");
-		return PTR_ERR(hdmi->vpll_clk);
+	} else if (IS_ERR(hdmi->ref_clk)) {
+		DRM_DEV_ERROR(hdmi->dev, "failed to get reference clock\n");
+		return PTR_ERR(hdmi->ref_clk);
 	}
 
 	hdmi->grf_clk = devm_clk_get(hdmi->dev, "grf");
@@ -262,7 +263,7 @@ static void dw_hdmi_rockchip_encoder_mode_set(struct drm_encoder *encoder,
 {
 	struct rockchip_hdmi *hdmi = to_rockchip_hdmi(encoder);
 
-	clk_set_rate(hdmi->vpll_clk, adj_mode->clock * 1000);
+	clk_set_rate(hdmi->ref_clk, adj_mode->clock * 1000);
 }
 
 static void dw_hdmi_rockchip_encoder_enable(struct drm_encoder *encoder)
@@ -542,9 +543,9 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 		return ret;
 	}
 
-	ret = clk_prepare_enable(hdmi->vpll_clk);
+	ret = clk_prepare_enable(hdmi->ref_clk);
 	if (ret) {
-		DRM_DEV_ERROR(hdmi->dev, "Failed to enable HDMI vpll: %d\n",
+		DRM_DEV_ERROR(hdmi->dev, "Failed to enable HDMI reference clock: %d\n",
 			      ret);
 		return ret;
 	}
@@ -563,7 +564,7 @@ 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);
+		clk_disable_unprepare(hdmi->ref_clk);
 	}
 
 	return ret;
@@ -575,7 +576,7 @@ 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);
+	clk_disable_unprepare(hdmi->ref_clk);
 }
 
 static const struct component_ops dw_hdmi_rockchip_ops = {
-- 
2.38.1