linux-kernel - [PATCH 1/2] drm/vkms: Use index instead of 0 in possible crtc

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Date:   Thu, 6 Jun 2019 19:40:38 -0300
From:   Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>
To:     Brian Starkey <brian.starkey@....com>,
        Liviu Dudau <liviu.dudau@....com>,
        Daniel Vetter <daniel@...ll.ch>,
        Haneen Mohammed <hamohammed.sa@...il.com>,
        Simon Ser <contact@...rsion.fr>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] drm/vkms: Use index instead of 0 in possible crtc

When vkms calls drm_universal_plane_init(), it sets 0 for the
possible_crtcs parameter which works well for a single encoder and
connector; however, this approach is not flexible and does not fit well
for vkms. This commit adds an index parameter for vkms_plane_init()
which makes code flexible and enables vkms to support other DRM features.

Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>
---
 drivers/gpu/drm/vkms/vkms_drv.c    | 2 +-
 drivers/gpu/drm/vkms/vkms_drv.h    | 4 ++--
 drivers/gpu/drm/vkms/vkms_output.c | 6 +++---
 drivers/gpu/drm/vkms/vkms_plane.c  | 4 ++--
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index 738dd6206d85..92296bd8f623 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -92,7 +92,7 @@ static int vkms_modeset_init(struct vkms_device *vkmsdev)
 	dev->mode_config.max_height = YRES_MAX;
 	dev->mode_config.preferred_depth = 24;
 
-	return vkms_output_init(vkmsdev);
+	return vkms_output_init(vkmsdev, 0);
 }
 
 static int __init vkms_init(void)
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 81f1cfbeb936..e81073dea154 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -113,10 +113,10 @@ bool vkms_get_vblank_timestamp(struct drm_device *dev, unsigned int pipe,
 			       int *max_error, ktime_t *vblank_time,
 			       bool in_vblank_irq);
 
-int vkms_output_init(struct vkms_device *vkmsdev);
+int vkms_output_init(struct vkms_device *vkmsdev, int index);
 
 struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev,
-				  enum drm_plane_type type);
+				  enum drm_plane_type type, int index);
 
 /* Gem stuff */
 struct drm_gem_object *vkms_gem_create(struct drm_device *dev,
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 3b162b25312e..1442b447c707 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -36,7 +36,7 @@ static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
 	.get_modes    = vkms_conn_get_modes,
 };
 
-int vkms_output_init(struct vkms_device *vkmsdev)
+int vkms_output_init(struct vkms_device *vkmsdev, int index)
 {
 	struct vkms_output *output = &vkmsdev->output;
 	struct drm_device *dev = &vkmsdev->drm;
@@ -46,12 +46,12 @@ int vkms_output_init(struct vkms_device *vkmsdev)
 	struct drm_plane *primary, *cursor = NULL;
 	int ret;
 
-	primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY);
+	primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
 	if (IS_ERR(primary))
 		return PTR_ERR(primary);
 
 	if (enable_cursor) {
-		cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR);
+		cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
 		if (IS_ERR(cursor)) {
 			ret = PTR_ERR(cursor);
 			goto err_cursor;
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index 0e67d2d42f0c..20ffc52f9194 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -168,7 +168,7 @@ static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
 };
 
 struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev,
-				  enum drm_plane_type type)
+				  enum drm_plane_type type, int index)
 {
 	struct drm_device *dev = &vkmsdev->drm;
 	const struct drm_plane_helper_funcs *funcs;
@@ -190,7 +190,7 @@ struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev,
 		funcs = &vkms_primary_helper_funcs;
 	}
 
-	ret = drm_universal_plane_init(dev, plane, 0,
+	ret = drm_universal_plane_init(dev, plane, 1 << index,
 				       &vkms_plane_funcs,
 				       formats, nformats,
 				       NULL, type, NULL);
-- 
2.21.0

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