drm/msm/dsi: Make each PHY type compilation independent

On a certain platform, only one type of DSI PHY is used.
This change allows the user to only compile the PHY type
which is being used.
Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/Kconfig

@@ -54,3 +54,17 @@ config DRM_MSM_DSI_PLL
 	help
 	  Choose this option to enable DSI PLL driver which provides DSI
 	  source clocks under common clock framework.
+
+config DRM_MSM_DSI_28NM_PHY
+	bool "Enable DSI 28nm PHY driver in MSM DRM"
+	depends on DRM_MSM_DSI
+	default y
+	help
+	  Choose this option if the 28nm DSI PHY is used on the platform.
+
+config DRM_MSM_DSI_20NM_PHY
+	bool "Enable DSI 20nm PHY driver in MSM DRM"
+	depends on DRM_MSM_DSI
+	default y
+	help
+	  Choose this option if the 20nm DSI PHY is used on the platform.

drivers/gpu/drm/msm/Makefile

@@ -57,11 +57,14 @@ msm-$(CONFIG_DRM_MSM_DSI) += dsi/dsi.o \
 			dsi/dsi_host.o \
 			dsi/dsi_manager.o \
 			dsi/phy/dsi_phy.o \
-			dsi/phy/dsi_phy_20nm.o \
-			dsi/phy/dsi_phy_28nm.o \
 			mdp/mdp5/mdp5_cmd_encoder.o
 
-msm-$(CONFIG_DRM_MSM_DSI_PLL) += dsi/pll/dsi_pll.o \
-				dsi/pll/dsi_pll_28nm.o
+msm-$(CONFIG_DRM_MSM_DSI_28NM_PHY) += dsi/phy/dsi_phy_28nm.o
+msm-$(CONFIG_DRM_MSM_DSI_20NM_PHY) += dsi/phy/dsi_phy_20nm.o
+
+ifeq ($(CONFIG_DRM_MSM_DSI_PLL),y)
+msm-y += dsi/pll/dsi_pll.o
+msm-$(CONFIG_DRM_MSM_DSI_28NM_PHY) += dsi/pll/dsi_pll_28nm.o
+endif
 
 obj-$(CONFIG_DRM_MSM)	+= msm.o

drivers/gpu/drm/msm/dsi/phy/dsi_phy.c

@@ -267,12 +267,16 @@ static void dsi_phy_disable_resource(struct msm_dsi_phy *phy)
 }
 
 static const struct of_device_id dsi_phy_dt_match[] = {
+#ifdef CONFIG_DRM_MSM_DSI_28NM_PHY
 	{ .compatible = "qcom,dsi-phy-28nm-hpm",
 	  .data = &dsi_phy_28nm_hpm_cfgs },
 	{ .compatible = "qcom,dsi-phy-28nm-lp",
 	  .data = &dsi_phy_28nm_lp_cfgs },
+#endif
+#ifdef CONFIG_DRM_MSM_DSI_20NM_PHY
 	{ .compatible = "qcom,dsi-phy-20nm",
 	  .data = &dsi_phy_20nm_cfgs },
+#endif
 	{}
 };
 

drivers/gpu/drm/msm/dsi/pll/dsi_pll.h

@@ -83,8 +83,16 @@ void msm_dsi_pll_helper_unregister_clks(struct platform_device *pdev,
 /*
  * Initialization for Each PLL Type
  */
+#ifdef CONFIG_DRM_MSM_DSI_28NM_PHY
 struct msm_dsi_pll *msm_dsi_pll_28nm_init(struct platform_device *pdev,
 					enum msm_dsi_phy_type type, int id);
+#else
+static inline struct msm_dsi_pll *msm_dsi_pll_28nm_init(
+	struct platform_device *pdev, enum msm_dsi_phy_type type, int id)
+{
+	return ERR_PTR(-ENODEV);
+}
+#endif
 
 #endif /* __DSI_PLL_H__ */