drm/vkms: Add mode_config initialization

Initialize minimum and maximum width and height of the frame buffers
with default values.

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Reviewed-by: Haneen Mohammed <hamohammed.sa@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/75c55df671f24b037f9172700b479f4bb2fa7c92.1526514457.git.rodrigosiqueiramelo@gmail.com

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index 35517b09538e..aec3f180f96d 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -9,6 +9,7 @@
 #include <drm/drmP.h>
 #include <drm/drm_gem.h>
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_atomic_helper.h>
 #include "vkms_drv.h"
 
 #define DRIVER_NAME     "vkms"
@@ -17,6 +18,12 @@
 #define DRIVER_MAJOR    1
 #define DRIVER_MINOR    0
 
+#define XRES_MIN    32
+#define YRES_MIN    32
+
+#define XRES_MAX  8192
+#define YRES_MAX  8192
+
 static struct vkms_device *vkms_device;
 
 static const struct file_operations vkms_driver_fops = {
@@ -67,6 +74,11 @@ static const struct drm_connector_funcs vkms_connector_funcs = {
         .destroy = vkms_connector_destroy,
 };
 
+static const struct drm_mode_config_funcs vkms_mode_funcs = {
+        .atomic_check = drm_atomic_helper_check,
+        .atomic_commit = drm_atomic_helper_commit,
+};
+
 static int __init vkms_init(void)
 {
         int ret;
@@ -87,6 +99,11 @@ static int __init vkms_init(void)
         }
 
         drm_mode_config_init(&vkms_device->drm);
+        vkms_device->drm.mode_config.funcs = &vkms_mode_funcs;
+        vkms_device->drm.mode_config.min_width = XRES_MIN;
+        vkms_device->drm.mode_config.min_height = YRES_MIN;
+        vkms_device->drm.mode_config.max_width = XRES_MAX;
+        vkms_device->drm.mode_config.max_height = YRES_MAX;
 
         ret = drm_connector_init(&vkms_device->drm, &vkms_device->connector,
                                  &vkms_connector_funcs,