drm: exynos: hdmi: add support for exynos5 hdmi

This patch adds support for exynos5 hdmi with device tree enabled.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 79 insertions, 4 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 89e798b47ded..5caf49f366e3 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -32,6 +32,9 @@
 #include <linux/pm_runtime.h>
 #include <linux/clk.h>
 #include <linux/regulator/consumer.h>
+#include <linux/io.h>
+#include <linux/of_gpio.h>
+#include <plat/gpio-cfg.h>
 
 #include <drm/exynos_drm.h>
 
@@ -2250,6 +2253,41 @@ void hdmi_attach_hdmiphy_client(struct i2c_client *hdmiphy)
                 hdmi_hdmiphy = hdmiphy;
 }
 
+#ifdef CONFIG_OF
+static struct s5p_hdmi_platform_data *drm_hdmi_dt_parse_pdata
+                                        (struct device *dev)
+{
+        struct device_node *np = dev->of_node;
+        struct s5p_hdmi_platform_data *pd;
+        enum of_gpio_flags flags;
+        u32 value;
+
+        pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+        if (!pd) {
+                DRM_ERROR("memory allocation for pdata failed\n");
+                goto err_data;
+        }
+
+        if (!of_find_property(np, "hpd-gpio", &value)) {
+                DRM_ERROR("no hpd gpio property found\n");
+                goto err_data;
+        }
+
+        pd->hpd_gpio = of_get_named_gpio_flags(np, "hpd-gpio", 0, &flags);
+
+        return pd;
+
+err_data:
+        return NULL;
+}
+#else
+static struct s5p_hdmi_platform_data *drm_hdmi_dt_parse_pdata
+                                        (struct device *dev)
+{
+        return NULL;
+}
+#endif
+
 static struct platform_device_id hdmi_driver_types[] = {
         {
                 .name           = "s5pv210-hdmi",
@@ -2259,7 +2297,19 @@ static struct platform_device_id hdmi_driver_types[] = {
                 .driver_data    = HDMI_TYPE13,
         }, {
                 .name           = "exynos4-hdmi14",
-                .driver_data    = HDMI_TYPE14,
+                .driver_data    = HDMI_TYPE14,
+        }, {
+                .name           = "exynos5-hdmi",
+                .driver_data    = HDMI_TYPE14,
+        }, {
+                /* end node */
+        }
+};
+
+static struct of_device_id hdmi_match_types[] = {
+        {
+                .compatible = "samsung,exynos5-hdmi",
+                .data   = (void *)HDMI_TYPE14,
         }, {
                 /* end node */
         }
@@ -2276,7 +2326,16 @@ static int __devinit hdmi_probe(struct platform_device *pdev)
 
         DRM_DEBUG_KMS("[%d]\n", __LINE__);
 
-        pdata = pdev->dev.platform_data;
+        if (pdev->dev.of_node) {
+                pdata = drm_hdmi_dt_parse_pdata(dev);
+                if (IS_ERR(pdata)) {
+                        DRM_ERROR("failed to parse dt\n");
+                        return PTR_ERR(pdata);
+                }
+        } else {
+                pdata = pdev->dev.platform_data;
+        }
+
         if (!pdata) {
                 DRM_ERROR("no platform data specified\n");
                 return -EINVAL;
@@ -2303,18 +2362,33 @@ static int __devinit hdmi_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, drm_hdmi_ctx);
 
-        hdata->type = (enum hdmi_type)platform_get_device_id
+        if (dev->of_node) {
+                const struct of_device_id *match;
+                match = of_match_node(of_match_ptr(hdmi_match_types),
+                                        pdev->dev.of_node);
+                hdata->type = (enum hdmi_type)match->data;
+        } else {
+                hdata->type = (enum hdmi_type)platform_get_device_id
                                         (pdev)->driver_data;
+        }
+
         hdata->hpd_gpio = pdata->hpd_gpio;
         hdata->dev = dev;
 
         ret = hdmi_resources_init(hdata);
+
         if (ret) {
                 ret = -EINVAL;
+                DRM_ERROR("hdmi_resources_init failed\n");
                 goto err_data;
         }
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                DRM_ERROR("failed to find registers\n");
+                ret = -ENOENT;
+                goto err_resource;
+        }
 
         hdata->regs = devm_request_and_ioremap(&pdev->dev, res);
         if (!hdata->regs) {
@@ -2462,8 +2536,9 @@ struct platform_driver hdmi_driver = {
         .remove         = __devexit_p(hdmi_remove),
         .id_table = hdmi_driver_types,
         .driver         = {
-                .name   = "exynos4-hdmi",
+                .name   = "exynos-hdmi",
                 .owner  = THIS_MODULE,
                 .pm     = &hdmi_pm_ops,
+                .of_match_table = hdmi_match_types,
         },
 };