drm/exynos: delay fbdev initialization until an output is connected

In case fbdev is initialized before any output is connected,
fb resolution defaults to 1024x768. After that any output with
bigger resolution is ignored and fbdev is not displayed.
The patch postpones fbdev initialization to avoid such situation.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 2389a32..cc238dc 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -109,24 +109,15 @@ static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
        /* setup possible_clones. */
        exynos_drm_encoder_setup(dev);
 
-       /*
-        * create and configure fb helper and also exynos specific
-        * fbdev object.
-        */
-       ret = exynos_drm_fbdev_init(dev);
-       if (ret) {
-               DRM_ERROR("failed to initialize drm fbdev\n");
-               goto err_drm_device;
-       }
-
        drm_vblank_offdelay = VBLANK_OFF_DELAY;
 
        platform_set_drvdata(dev->platformdev, dev);
 
+       /* force connectors detection */
+       drm_helper_hpd_irq_event(dev);
+
        return 0;
 
-err_drm_device:
-       exynos_drm_device_unregister(dev);
 err_vblank:
        drm_vblank_cleanup(dev);
 err_display_cleanup:
@@ -574,6 +565,7 @@ out_hdmi:
        platform_driver_unregister(&fimd_driver);
 out_fimd:
 #endif
+
 #ifdef CONFIG_DRM_EXYNOS_DP
        platform_driver_unregister(&dp_driver);
 out_dp:

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index c7c08d0..65a22ca 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -20,6 +20,7 @@
 
 #include "exynos_drm_drv.h"
 #include "exynos_drm_fb.h"
+#include "exynos_drm_fbdev.h"
 #include "exynos_drm_gem.h"
 #include "exynos_drm_iommu.h"
 #include "exynos_drm_crtc.h"
@@ -300,6 +301,8 @@ static void exynos_drm_output_poll_changed(struct drm_device *dev)
 
        if (fb_helper)
                drm_fb_helper_hotplug_event(fb_helper);
+       else
+               exynos_drm_fbdev_init(dev);
 }
 
 static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {