[PATCH 3/4] drm/vkms: Add connectors helpers

[Rodrigo Siqueira]

This patch adds the struct drm_connector_helper_funcs with some
necessary hooks. Additionally, it also adds some missing hooks at
drm_connector_funcs.

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo at gmail.com>
---
 drivers/gpu/drm/vkms/vkms_drv.c    |  6 ------
 drivers/gpu/drm/vkms/vkms_drv.h    |  9 +++++++++
 drivers/gpu/drm/vkms/vkms_output.c | 27 +++++++++++++++++++++++++++
 3 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index cc046fff985c..fe93f8c17997 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -19,12 +19,6 @@
 #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 = {
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 54bb3dd2b2c1..76f1720f81a5 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -6,6 +6,15 @@
 #include <drm/drm_gem.h>
 #include <drm/drm_encoder.h>
 
+#define XRES_MIN    32
+#define YRES_MIN    32
+
+#define XRES_DEF  1024
+#define YRES_DEF   768
+
+#define XRES_MAX  8192
+#define YRES_MAX  8192
+
 static const u32 vkms_formats[] = {
 	DRM_FORMAT_XRGB8888,
 };
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 48143eac3c12..fef3b1c1b054 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -8,6 +8,7 @@
 
 #include "vkms_drv.h"
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_atomic_helper.h>
 
 static void vkms_connector_destroy(struct drm_connector *connector)
 {
@@ -18,12 +19,36 @@ static void vkms_connector_destroy(struct drm_connector *connector)
 static const struct drm_connector_funcs vkms_connector_funcs = {
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = vkms_connector_destroy,
+	.reset = drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
 static const struct drm_encoder_funcs vkms_encoder_funcs = {
 	.destroy = drm_encoder_cleanup,
 };
 
+static int vkms_conn_get_modes(struct drm_connector *connector)
+{
+	int count;
+
+	count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
+	drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
+
+	return count;
+}
+
+static int vkms_conn_mode_valid(struct drm_connector *connector,
+				struct drm_display_mode *mode)
+{
+	return MODE_OK;
+}
+
+static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
+	.get_modes    = vkms_conn_get_modes,
+	.mode_valid   = vkms_conn_mode_valid,
+};
+
 int vkms_output_init(struct vkms_device *vkmsdev)
 {
 	struct vkms_output *output = &vkmsdev->output;
@@ -49,6 +74,8 @@ int vkms_output_init(struct vkms_device *vkmsdev)
 		goto err_connector;
 	}
 
+	drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
+
 	ret = drm_connector_register(connector);
 	if (ret) {
 		DRM_ERROR("Failed to register connector\n");
-- 
2.17.1