drm/msm/hdmi: Manage HDMI PLL through PHY driver

Add a helper to initialize PLL in the PHY driver. HDMI PLLs are going to
have their own mmio base different from that of PHY.

For the clock code in hdmi_phy_8960.c, some changes were needed for it to
work with the updated register offsets. Create a copy of the updated clock
code in hdmi_pll_8960.c, instead of rewriting it in hdmi_phy_8960.c
itself. This removes the need to place CONFIG_COMMON_CLOCK checks all
around, makes the code more legible, and also removes some old checkpatch
warnings with the original code.

The older hdmi pll clock ops in hdmi_phy_8960.c will be removed later. The
driver will use these until the HDMI PHY/PLL register offsets aren't
considered as separate domains (i.e. their offsets start from 0).
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/Makefile

@@ -53,6 +53,7 @@ msm-y := \
 
 msm-$(CONFIG_DRM_FBDEV_EMULATION) += msm_fbdev.o
 msm-$(CONFIG_COMMON_CLK) += mdp/mdp4/mdp4_lvds_pll.o
+msm-$(CONFIG_COMMON_CLK) += hdmi/hdmi_pll_8960.o
 
 msm-$(CONFIG_DRM_MSM_DSI) += dsi/dsi.o \
 			mdp/mdp4/mdp4_dsi_encoder.o \

drivers/gpu/drm/msm/hdmi/hdmi.h

@@ -198,6 +198,15 @@ void hdmi_phy_powerdown(struct hdmi_phy *phy);
 void __init hdmi_phy_driver_register(void);
 void __exit hdmi_phy_driver_unregister(void);
 
+#ifdef CONFIG_COMMON_CLK
+int hdmi_pll_8960_init(struct platform_device *pdev);
+#else
+int hdmi_pll_8960_init(struct platform_device *pdev);
+{
+	return -ENODEV;
+}
+#endif
+
 /*
  * audio:
  */

drivers/gpu/drm/msm/hdmi/hdmi_phy.c

@@ -118,6 +118,28 @@ void hdmi_phy_powerdown(struct hdmi_phy *phy)
 	phy->cfg->powerdown(phy);
 }
 
+static int hdmi_phy_pll_init(struct platform_device *pdev,
+			     enum hdmi_phy_type type)
+{
+	int ret;
+
+	switch (type) {
+	case MSM_HDMI_PHY_8960:
+		ret = hdmi_pll_8960_init(pdev);
+		break;
+	/*
+	 * we don't have PLL support for these, don't report an error for now
+	 */
+	case MSM_HDMI_PHY_8x60:
+	case MSM_HDMI_PHY_8x74:
+	default:
+		ret = 0;
+		break;
+	}
+
+	return ret;
+}
+
 static int hdmi_phy_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -146,6 +168,19 @@ static int hdmi_phy_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(&pdev->dev);
 
+	ret = hdmi_phy_resource_enable(phy);
+	if (ret)
+		return ret;
+
+	ret = hdmi_phy_pll_init(pdev, phy->cfg->type);
+	if (ret) {
+		dev_err(dev, "couldn't init PLL\n");
+		hdmi_phy_resource_disable(phy);
+		return ret;
+	}
+
+	hdmi_phy_resource_disable(phy);
+
 	platform_set_drvdata(pdev, phy);
 
 	return 0;