drm/exynos: added kms poll for handling hpd event

this patch adds kms poll infrastructure to handle hotplug detection event

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 83810cb..53e2216 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -27,6 +27,7 @@
 
 #include "drmP.h"
 #include "drm.h"
+#include "drm_crtc_helper.h"
 
 #include <drm/exynos_drm.h>
 
@@ -61,6 +62,9 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
 
        drm_mode_config_init(dev);
 
+       /* init kms poll for handling hpd */
+       drm_kms_helper_poll_init(dev);
+
        exynos_drm_mode_config_init(dev);
 
        /*
@@ -116,6 +120,7 @@ static int exynos_drm_unload(struct drm_device *dev)
        exynos_drm_fbdev_fini(dev);
        exynos_drm_device_unregister(dev);
        drm_vblank_cleanup(dev);
+       drm_kms_helper_poll_fini(dev);
        drm_mode_config_cleanup(dev);
        kfree(dev->dev_private);
 

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index 48d29cf..7d91a54 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -29,7 +29,9 @@
 #include "drmP.h"
 #include "drm_crtc.h"
 #include "drm_crtc_helper.h"
+#include "drm_fb_helper.h"
 
+#include "exynos_drm_drv.h"
 #include "exynos_drm_fb.h"
 #include "exynos_drm_buf.h"
 #include "exynos_drm_gem.h"
@@ -238,8 +240,18 @@ struct exynos_drm_buf_entry *exynos_drm_fb_get_buf(struct drm_framebuffer *fb)
        return entry;
 }
 
+static void exynos_drm_output_poll_changed(struct drm_device *dev)
+{
+       struct exynos_drm_private *private = dev->dev_private;
+       struct drm_fb_helper *fb_helper = private->fb_helper;
+
+       if (fb_helper)
+               drm_fb_helper_hotplug_event(fb_helper);
+}
+
 static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
        .fb_create = exynos_drm_fb_create,
+       .output_poll_changed = exynos_drm_output_poll_changed,
 };
 
 void exynos_drm_mode_config_init(struct drm_device *dev)