drm/msm/hdmi: rework hdmi configurations, using dt_match[]

In the same idea mdp5_cfg was added, this change allows us to quickly
add new instances, such as apq8084's HDMI in this case.
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

Documentation/devicetree/bindings/drm/msm/hdmi.txt

@@ -3,6 +3,7 @@ Qualcomm adreno/snapdragon hdmi output
 Required properties:
 - compatible: one of the following
    * "qcom,hdmi-tx-8084"
+   * "qcom,hdmi-tx-8074"
    * "qcom,hdmi-tx-8660"
    * "qcom,hdmi-tx-8960"
 - reg: Physical base address and length of the controller's registers

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

 /*
+ * Copyright (c) 2014 The Linux Foundation. All rights reserved.
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
  *
@@ -286,6 +287,57 @@ int hdmi_modeset_init(struct hdmi *hdmi,
 
 #include <linux/of_gpio.h>
 
+#define HDMI_CFG(item, entry) \
+	.item ## _names = item ##_names_ ## entry, \
+	.item ## _cnt   = ARRAY_SIZE(item ## _names_ ## entry)
+
+static struct hdmi_platform_config hdmi_tx_8660_config = {
+		.phy_init = hdmi_phy_8x60_init,
+};
+
+static const char *hpd_reg_names_8960[] = {"core-vdda", "hdmi-mux"};
+static const char *hpd_clk_names_8960[] = {"core_clk", "master_iface_clk", "slave_iface_clk"};
+
+static struct hdmi_platform_config hdmi_tx_8960_config = {
+		.phy_init = hdmi_phy_8960_init,
+		HDMI_CFG(hpd_reg, 8960),
+		HDMI_CFG(hpd_clk, 8960),
+};
+
+static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
+static const char *hpd_reg_names_8x74[] = {"hpd-gdsc", "hpd-5v"};
+static const char *pwr_clk_names_8x74[] = {"extp_clk", "alt_iface_clk"};
+static const char *hpd_clk_names_8x74[] = {"iface_clk", "core_clk", "mdp_core_clk"};
+static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0};
+
+static struct hdmi_platform_config hdmi_tx_8074_config = {
+		.phy_init = hdmi_phy_8x74_init,
+		HDMI_CFG(pwr_reg, 8x74),
+		HDMI_CFG(hpd_reg, 8x74),
+		HDMI_CFG(pwr_clk, 8x74),
+		HDMI_CFG(hpd_clk, 8x74),
+		.hpd_freq      = hpd_clk_freq_8x74,
+};
+
+static const char *hpd_reg_names_8084[] = {"hpd-gdsc", "hpd-5v", "hpd-5v-en"};
+
+static struct hdmi_platform_config hdmi_tx_8084_config = {
+		.phy_init = hdmi_phy_8x74_init,
+		HDMI_CFG(pwr_reg, 8x74),
+		HDMI_CFG(hpd_reg, 8084),
+		HDMI_CFG(pwr_clk, 8x74),
+		HDMI_CFG(hpd_clk, 8x74),
+		.hpd_freq      = hpd_clk_freq_8x74,
+};
+
+static const struct of_device_id dt_match[] = {
+	{ .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8084_config },
+	{ .compatible = "qcom,hdmi-tx-8074", .data = &hdmi_tx_8074_config },
+	{ .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config },
+	{ .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8660_config },
+	{}
+};
+
 #ifdef CONFIG_OF
 static int get_gpio(struct device *dev, struct device_node *of_node, const char *name)
 {
@@ -308,66 +360,31 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
 {
 	struct drm_device *drm = dev_get_drvdata(master);
 	struct msm_drm_private *priv = drm->dev_private;
-	static struct hdmi_platform_config config = {};
+	static struct hdmi_platform_config *hdmi_cfg;
 	struct hdmi *hdmi;
 #ifdef CONFIG_OF
 	struct device_node *of_node = dev->of_node;
+	const struct of_device_id *match;
 
-	if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8074")) {
-		static const char *hpd_reg_names[] = {"hpd-gdsc", "hpd-5v"};
-		static const char *pwr_reg_names[] = {"core-vdda", "core-vcc"};
-		static const char *hpd_clk_names[] = {"iface_clk", "core_clk", "mdp_core_clk"};
-		static unsigned long hpd_clk_freq[] = {0, 19200000, 0};
-		static const char *pwr_clk_names[] = {"extp_clk", "alt_iface_clk"};
-		config.phy_init      = hdmi_phy_8x74_init;
-		config.hpd_reg_names = hpd_reg_names;
-		config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
-		config.pwr_reg_names = pwr_reg_names;
-		config.pwr_reg_cnt   = ARRAY_SIZE(pwr_reg_names);
-		config.hpd_clk_names = hpd_clk_names;
-		config.hpd_freq      = hpd_clk_freq;
-		config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
-		config.pwr_clk_names = pwr_clk_names;
-		config.pwr_clk_cnt   = ARRAY_SIZE(pwr_clk_names);
-	} else if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8084")) {
-		static const char *hpd_reg_names[] = {"hpd-gdsc", "hpd-5v", "hpd-5v-en"};
-		static const char *pwr_reg_names[] = {"core-vdda", "core-vcc"};
-		static const char *hpd_clk_names[] = {"iface_clk", "core_clk", "mdp_core_clk"};
-		static unsigned long hpd_clk_freq[] = {0, 19200000, 0};
-		static const char *pwr_clk_names[] = {"extp_clk", "alt_iface_clk"};
-		config.phy_init      = hdmi_phy_8x74_init;
-		config.hpd_reg_names = hpd_reg_names;
-		config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
-		config.pwr_reg_names = pwr_reg_names;
-		config.pwr_reg_cnt   = ARRAY_SIZE(pwr_reg_names);
-		config.hpd_clk_names = hpd_clk_names;
-		config.hpd_freq      = hpd_clk_freq;
-		config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
-		config.pwr_clk_names = pwr_clk_names;
-		config.pwr_clk_cnt   = ARRAY_SIZE(pwr_clk_names);
-	} else if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8960")) {
-		static const char *hpd_clk_names[] = {"core_clk", "master_iface_clk", "slave_iface_clk"};
-		static const char *hpd_reg_names[] = {"core-vdda", "hdmi-mux"};
-		config.phy_init      = hdmi_phy_8960_init;
-		config.hpd_reg_names = hpd_reg_names;
-		config.hpd_reg_cnt   = ARRAY_SIZE(hpd_reg_names);
-		config.hpd_clk_names = hpd_clk_names;
-		config.hpd_clk_cnt   = ARRAY_SIZE(hpd_clk_names);
-	} else if (of_device_is_compatible(of_node, "qcom,hdmi-tx-8660")) {
-		config.phy_init      = hdmi_phy_8x60_init;
+	match = of_match_node(dt_match, of_node);
+	if (match && match->data) {
+		hdmi_cfg = (struct hdmi_platform_config *)match->data;
+		DBG("hdmi phy: %s", match->compatible);
 	} else {
 		dev_err(dev, "unknown phy: %s\n", of_node->name);
+		return -ENXIO;
 	}
 
-	config.mmio_name     = "core_physical";
-	config.ddc_clk_gpio  = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-clk");
-	config.ddc_data_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-data");
-	config.hpd_gpio      = get_gpio(dev, of_node, "qcom,hdmi-tx-hpd");
-	config.mux_en_gpio   = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-en");
-	config.mux_sel_gpio  = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-sel");
-	config.mux_lpm_gpio  = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-lpm");
+	hdmi_cfg->mmio_name     = "core_physical";
+	hdmi_cfg->ddc_clk_gpio  = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-clk");
+	hdmi_cfg->ddc_data_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-data");
+	hdmi_cfg->hpd_gpio      = get_gpio(dev, of_node, "qcom,hdmi-tx-hpd");
+	hdmi_cfg->mux_en_gpio   = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-en");
+	hdmi_cfg->mux_sel_gpio  = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-sel");
+	hdmi_cfg->mux_lpm_gpio  = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-lpm");
 
 #else
+	static struct hdmi_platform_config config = {};
 	static const char *hpd_clk_names[] = {
 			"core_clk", "master_iface_clk", "slave_iface_clk",
 	};
@@ -413,12 +430,15 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
 		config.mux_en_gpio   = -1;
 		config.mux_sel_gpio  = -1;
 	}
+	hdmi_cfg = &config;
 #endif
-	dev->platform_data = &config;
+	dev->platform_data = hdmi_cfg;
+
 	hdmi = hdmi_init(to_platform_device(dev));
 	if (IS_ERR(hdmi))
 		return PTR_ERR(hdmi);
 	priv->hdmi = hdmi;
+
 	return 0;
 }
 
@@ -449,14 +469,6 @@ static int hdmi_dev_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id dt_match[] = {
-	{ .compatible = "qcom,hdmi-tx-8084" },
-	{ .compatible = "qcom,hdmi-tx-8074" },
-	{ .compatible = "qcom,hdmi-tx-8960" },
-	{ .compatible = "qcom,hdmi-tx-8660" },
-	{}
-};
-
 static struct platform_driver hdmi_driver = {
 	.probe = hdmi_dev_probe,
 	.remove = hdmi_dev_remove,