Subject: [PATCH 11/21] Subject: [PATCH 11/19] OMAP4: DSS: add generic notifier mechanism

A callback can be registered by the dssdev client in order to be
notified of resolution changes, for example an external monitor
that is hot-plugged.

Multiple clients can now register for notification from one
dssdev, and the notification mechanism can be extended in the
future to add other events.

This is a port of Rob Clark's <rob@ti.com> original patch.

Signed-off-by: Sebastien Jan <s-jan@ti.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index f36e9880327..5cddf2e9996 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -1182,6 +1182,7 @@ static void hdmi_enable_clocks(int enable)
 static int hdmi_power_on(struct omap_dss_device *dssdev)
 {
         int r, code = 0;
+        int dirty = true;
         struct hdmi_pll_info pll_data;
         struct omap_video_timings *p;
         unsigned long phy;
@@ -1197,8 +1198,10 @@ static int hdmi_power_on(struct omap_dss_device *dssdev)
                 dssdev->panel.timings.y_res);
 
         if (!hdmi.custom_set) {
+                code = get_timings_index();
                 DSSDBG("Read EDID as no EDID is not set on poweron\n");
                 hdmi_read_edid(p);
+                dirty = get_timings_index() != code;
         }
         code = get_timings_index();
         dssdev->panel.timings = cea_vesa_timings[code].timings;
@@ -1210,7 +1213,11 @@ static int hdmi_power_on(struct omap_dss_device *dssdev)
 
         hdmi_wp_video_start(0);
 
-        /* config the PLL and PHY first */
+        if (dirty) {
+                omap_dss_notify(dssdev, OMAP_DSS_SIZE_CHANGE);
+        }
+ 
+        /* config the PLL and PHY first */
         r = hdmi_pll_program(&pll_data);
         if (r) {
                 DSSDBG("Failed to lock PLL\n");