[PATCH 2/3] drm/vkms: Add encoder initialization

[Rodrigo Siqueira]

This commit adds a single and simple virtual encoder to VKMS.

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiram...@gmail.com>
---
 drivers/gpu/drm/vkms/vkms_display.c | 25 +++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_drv.h     |  2 ++
 2 files changed, 27 insertions(+)

diff --git a/drivers/gpu/drm/vkms/vkms_display.c 
b/drivers/gpu/drm/vkms/vkms_display.c
index b20b41f9590b..d6702128b5f7 100644
--- a/drivers/gpu/drm/vkms/vkms_display.c
+++ b/drivers/gpu/drm/vkms/vkms_display.c
@@ -44,11 +44,16 @@ static const struct drm_connector_funcs 
vkms_connector_funcs = {
        .destroy = vkms_connector_destroy,
 };
 
+static const struct drm_encoder_funcs vkms_encoder_funcs = {
+       .destroy = drm_encoder_cleanup,
+};
+
 static int vkms_output_init(struct vkms_device *vkmsdev)
 {
        struct vkms_output *output = &vkmsdev->output;
        struct drm_device *dev = &vkmsdev->drm;
        struct drm_connector *connector = &output->connector;
+       struct drm_encoder *encoder = &output->encoder;
        struct drm_crtc *crtc = &output->crtc;
        struct drm_plane *primary;
        int ret;
@@ -78,10 +83,30 @@ static int vkms_output_init(struct vkms_device *vkmsdev)
                goto err_connector_register;
        }
 
+       ret = drm_encoder_init(dev, encoder, &vkms_encoder_funcs,
+                              DRM_MODE_ENCODER_VIRTUAL, NULL);
+       if (ret) {
+               DRM_ERROR("Failed to init encoder\n");
+               goto err_encoder;
+       }
+       encoder->possible_crtcs = 1;
+
+       ret = drm_mode_connector_attach_encoder(connector, encoder);
+       if (ret) {
+               DRM_ERROR("Failed to attach connector to encoder\n");
+               goto err_attach;
+       }
+
        drm_mode_config_reset(dev);
 
        return 0;
 
+err_attach:
+       drm_encoder_cleanup(encoder);
+
+err_encoder:
+       drm_connector_unregister(connector);
+
 err_connector_register:
        drm_connector_cleanup(connector);
 
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 292bdea9c785..933eedc5b25b 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -3,6 +3,7 @@
 
 #include <drm/drmP.h>
 #include <drm/drm.h>
+#include <drm/drm_encoder.h>
 
 static const u32 vkms_formats[] = {
        DRM_FORMAT_XRGB8888,
@@ -17,6 +18,7 @@ static const u32 vkms_formats[] = {
 
 struct vkms_output {
        struct drm_crtc crtc;
+       struct drm_encoder encoder;
        struct drm_connector connector;
 };
 
-- 
2.17.0

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