[PATCH v2 3/6] drm/vkms: Provide platform data when creating VKMS devices

[Jim Shargo <jshargo@chromium.org>]

This is a small refactor to make ConfigFS support easier. This should be
a no-op refactor.

Signed-off-by: Jim Shargo <jshargo@chromium.org>
---
 drivers/gpu/drm/vkms/vkms_drv.c    | 13 +++++++++++--
 drivers/gpu/drm/vkms/vkms_drv.h    |  9 ++++++---
 drivers/gpu/drm/vkms/vkms_output.c |  2 +-
 3 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index aa2bee82b757..d43121addf66 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -152,12 +152,14 @@ static int vkms_modeset_init(struct vkms_device *vkmsdev)
 	dev->mode_config.preferred_depth = 0;
 	dev->mode_config.helper_private = &vkms_mode_config_helpers;
 
-	return vkms_output_init(vkmsdev, 0);
+	return vkmsdev->is_default ? vkms_output_init_default(vkmsdev) :
+				     -ENOSYS;
 }
 
 static int vkms_platform_probe(struct platform_device *pdev)
 {
 	int ret;
+	struct vkms_device_setup *vkms_device_setup = pdev->dev.platform_data;
 	struct vkms_device *vkms_device;
 	void *grp;
 
@@ -177,6 +179,7 @@ static int vkms_platform_probe(struct platform_device *pdev)
 	vkms_device->config.cursor = enable_cursor;
 	vkms_device->config.writeback = enable_writeback;
 	vkms_device->config.overlay = enable_overlay;
+	vkms_device->is_default = vkms_device_setup->is_default;
 
 	ret = dma_coerce_mask_and_coherent(vkms_device->drm.dev,
 					   DMA_BIT_MASK(64));
@@ -240,6 +243,9 @@ static int __init vkms_init(void)
 {
 	int ret;
 	struct platform_device *pdev;
+	struct vkms_device_setup vkms_device_setup = {
+		.is_default = true,
+	};
 
 	ret = platform_driver_register(&vkms_platform_driver);
 	if (ret) {
@@ -247,8 +253,11 @@ static int __init vkms_init(void)
 		return ret;
 	}
 
-	pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
+	pdev = platform_device_register_data(NULL, DRIVER_NAME, 0,
+					     &vkms_device_setup,
+					     sizeof(vkms_device_setup));
 	if (IS_ERR(pdev)) {
+		DRM_ERROR("Unable to register default vkms device\n");
 		platform_driver_unregister(&vkms_platform_driver);
 		return PTR_ERR(pdev);
 	}
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 4c3274838ec7..84b35aa1dc5a 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -121,17 +121,20 @@ struct vkms_output {
 	struct vkms_plane planes[VKMS_MAX_PLANES];
 };
 
-struct vkms_device;
-
 struct vkms_config {
 	bool writeback;
 	bool cursor;
 	bool overlay;
 };
 
+struct vkms_device_setup {
+	bool is_default;
+};
+
 struct vkms_device {
 	struct drm_device drm;
 	struct platform_device *platform;
+	bool is_default;
 	struct vkms_output output;
 	struct vkms_config config;
 };
@@ -155,7 +158,7 @@ struct vkms_crtc *vkms_crtc_init(struct vkms_device *vkmsdev,
 				 struct drm_plane *primary,
 				 struct drm_plane *cursor);
 
-int vkms_output_init(struct vkms_device *vkmsdev, int index);
+int vkms_output_init_default(struct vkms_device *vkmsdev);
 
 struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
 				   enum drm_plane_type type);
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 6b4a77780d3c..3b5e272a8b33 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -80,7 +80,7 @@ static struct drm_encoder *vkms_encoder_init(struct vkms_device *vkms_device)
 	return encoder;
 }
 
-int vkms_output_init(struct vkms_device *vkmsdev, int index)
+int vkms_output_init_default(struct vkms_device *vkmsdev)
 {
 	struct vkms_output *output = &vkmsdev->output;
 	struct drm_device *dev = &vkmsdev->drm;
-- 
2.41.0.162.gfafddb0af9-goog