6 files changed, 59 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index 2e7799c82960..f58c302b730d 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -495,6 +495,7 @@ void omapdss_hdmi_display_set_timing(struct omap_dss_device *dssdev);
 int omapdss_hdmi_display_check_timing(struct omap_dss_device *dssdev,
                                         struct omap_video_timings *timings);
 int omapdss_hdmi_read_edid(u8 *buf, int len);
+bool omapdss_hdmi_detect(void);
 int hdmi_panel_init(void);
 void hdmi_panel_exit(void);
 
diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c
index 076f399a9153..ab4166590a74 100644
--- a/drivers/video/omap2/dss/dss_features.c
+++ b/drivers/video/omap2/dss/dss_features.c
@@ -440,6 +440,7 @@ static const struct ti_hdmi_ip_ops omap4_hdmi_functions = {
         .phy_enable             =       ti_hdmi_4xxx_phy_enable,
         .phy_disable            =       ti_hdmi_4xxx_phy_disable,
         .read_edid              =       ti_hdmi_4xxx_read_edid,
+        .detect                 =       ti_hdmi_4xxx_detect,
         .pll_enable             =       ti_hdmi_4xxx_pll_enable,
         .pll_disable            =       ti_hdmi_4xxx_pll_disable,
         .video_enable           =       ti_hdmi_4xxx_wp_video_start,
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index fb85ce5a8ab4..781867002662 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -449,6 +449,23 @@ int omapdss_hdmi_read_edid(u8 *buf, int len)
         return r;
 }
 
+bool omapdss_hdmi_detect(void)
+{
+        int r;
+
+        mutex_lock(&hdmi.lock);
+
+        r = hdmi_runtime_get();
+        BUG_ON(r);
+
+        r = hdmi.ip_data.ops->detect(&hdmi.ip_data);
+
+        hdmi_runtime_put();
+        mutex_unlock(&hdmi.lock);
+
+        return r == 1;
+}
+
 int omapdss_hdmi_display_enable(struct omap_dss_device *dssdev)
 {
         int r = 0;
diff --git a/drivers/video/omap2/dss/hdmi_panel.c b/drivers/video/omap2/dss/hdmi_panel.c
index 71aa8134f4fb..533d5dc634d2 100644
--- a/drivers/video/omap2/dss/hdmi_panel.c
+++ b/drivers/video/omap2/dss/hdmi_panel.c
@@ -25,6 +25,7 @@
 #include <linux/mutex.h>
 #include <linux/module.h>
 #include <video/omapdss.h>
+#include <linux/slab.h>
 
 #include "dss.h"
 
@@ -198,6 +199,29 @@ err:
         return r;
 }
 
+static bool hdmi_detect(struct omap_dss_device *dssdev)
+{
+        int r;
+
+        mutex_lock(&hdmi.hdmi_lock);
+
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
+                r = omapdss_hdmi_display_enable(dssdev);
+                if (r)
+                        goto err;
+        }
+
+        r = omapdss_hdmi_detect();
+
+        if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED ||
+                        dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED)
+                omapdss_hdmi_display_disable(dssdev);
+err:
+        mutex_unlock(&hdmi.hdmi_lock);
+
+        return r;
+}
+
 static struct omap_dss_driver hdmi_driver = {
         .probe          = hdmi_panel_probe,
         .remove         = hdmi_panel_remove,
@@ -209,6 +233,7 @@ static struct omap_dss_driver hdmi_driver = {
         .set_timings    = hdmi_set_timings,
         .check_timings  = hdmi_check_timings,
         .read_edid      = hdmi_read_edid,
+        .detect         = hdmi_detect,
         .driver                 = {
                 .name   = "hdmi_panel",
                 .owner  = THIS_MODULE,
diff --git a/drivers/video/omap2/dss/ti_hdmi.h b/drivers/video/omap2/dss/ti_hdmi.h
index 390cd85b122f..d48603c8e23d 100644
--- a/drivers/video/omap2/dss/ti_hdmi.h
+++ b/drivers/video/omap2/dss/ti_hdmi.h
@@ -94,6 +94,8 @@ struct ti_hdmi_ip_ops {
 
         int (*read_edid)(struct hdmi_ip_data *ip_data, u8 *edid, int len);
 
+        bool (*detect)(struct hdmi_ip_data *ip_data);
+
         int (*pll_enable)(struct hdmi_ip_data *ip_data);
 
         void (*pll_disable)(struct hdmi_ip_data *ip_data);
@@ -114,6 +116,7 @@ struct hdmi_ip_data {
 int ti_hdmi_4xxx_phy_enable(struct hdmi_ip_data *ip_data);
 void ti_hdmi_4xxx_phy_disable(struct hdmi_ip_data *ip_data);
 int ti_hdmi_4xxx_read_edid(struct hdmi_ip_data *ip_data, u8 *edid, int len);
+bool ti_hdmi_4xxx_detect(struct hdmi_ip_data *ip_data);
 void ti_hdmi_4xxx_wp_video_start(struct hdmi_ip_data *ip_data, bool start);
 int ti_hdmi_4xxx_pll_enable(struct hdmi_ip_data *ip_data);
 void ti_hdmi_4xxx_pll_disable(struct hdmi_ip_data *ip_data);
diff --git a/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c b/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
index e9885dcc4122..da7fe50fc127 100644
--- a/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
+++ b/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
@@ -416,6 +416,18 @@ int ti_hdmi_4xxx_read_edid(struct hdmi_ip_data *ip_data,
         return l;
 }
 
+bool ti_hdmi_4xxx_detect(struct hdmi_ip_data *ip_data)
+{
+        int r;
+
+        void __iomem *base = hdmi_core_sys_base(ip_data);
+
+        /* HPD */
+        r = REG_GET(base, HDMI_CORE_SYS_SYS_STAT, 1, 1);
+
+        return r == 1;
+}
+
 static void hdmi_core_init(struct hdmi_core_video_config *video_cfg,
                         struct hdmi_core_infoframe_avi *avi_cfg,
                         struct hdmi_core_packet_enable_repeat *repeat_cfg)