VKMS currently supports only one CRTC, so it make no sense to have this
index configurable. To avoid issues, replace this hardcoded index by
drm_crtc_mask when applicable.
There is no need to manually set a crtc mask on primary and cursor plane
as it is automatically set by drmm_crtc_alloc_with_planes.
In addition, this will remove the use of an uninitialized structure in
vkms_add_overlay_plane. This currently works by chance because two things:
- vkms_plane_init always set a possible_crtcs value, so the problematic
branch is never used;
- drm_crtc_mask on an kzalloc'd drm_crtc returns BIT(0), and the VKMS CRTC
always have this id.
Signed-off-by: Louis Chauvet <louis.chauvet@xxxxxxxxxxx>
---
Changes in v2:
- Applied comments from José
- Link to v1: https://lore.kernel.org/r/20240906-vkms-remove-index-v1-1-3cfedd8ccb2f@xxxxxxxxxxx
---
drivers/gpu/drm/vkms/vkms_drv.c | 2 +-
drivers/gpu/drm/vkms/vkms_drv.h | 8 ++----
drivers/gpu/drm/vkms/vkms_output.c | 54 ++++++++++++++------------------------
drivers/gpu/drm/vkms/vkms_plane.c | 4 +--
4 files changed, 24 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index 2d1e95cb66e5..0f6805b9fe7b 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -174,7 +174,7 @@ 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 vkms_output_init(vkmsdev);
}
static int vkms_create(struct vkms_config *config)
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 672fe191e239..036101ee4ea1 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -212,21 +212,17 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
* vkms_output_init() - Initialize all sub-components needed for a VKMS device.
*
* @vkmsdev: VKMS device to initialize
- * @index: CRTC which can be attached to the planes. The caller must ensure that
- * @index is positive and less or equals to 31.
*/
-int vkms_output_init(struct vkms_device *vkmsdev, int index);
+int vkms_output_init(struct vkms_device *vkmsdev);
/**
* vkms_plane_init() - Initialize a plane
*
* @vkmsdev: VKMS device containing the plane
* @type: type of plane to initialize
- * @index: CRTC which can be attached to the plane. The caller must ensure that
- * @index is positive and less or equals to 31.
*/
struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
- enum drm_plane_type type, int index);
+ enum drm_plane_type type);
/* CRC Support */
const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
index 0a5a185aa0b0..5128aa3b2eb6 100644
--- a/drivers/gpu/drm/vkms/vkms_output.c
+++ b/drivers/gpu/drm/vkms/vkms_output.c
@@ -32,29 +32,14 @@ static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
.get_modes = vkms_conn_get_modes,
};
-static int vkms_add_overlay_plane(struct vkms_device *vkmsdev, int index,
- struct drm_crtc *crtc)
-{
- struct vkms_plane *overlay;
-
- overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
- if (IS_ERR(overlay))
- return PTR_ERR(overlay);
-
- if (!overlay->base.possible_crtcs)
- overlay->base.possible_crtcs = drm_crtc_mask(crtc);
-
- return 0;
-}
-
-int vkms_output_init(struct vkms_device *vkmsdev, int index)
+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 vkms_plane *primary, *cursor = NULL;
+ struct vkms_plane *primary, *overlay, *cursor = NULL;
int ret;
int writeback;
unsigned int n;
@@ -65,34 +50,37 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
* The overlay and cursor planes are not mandatory, but can be used to perform complex
* composition.
*/
- primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
+ primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY);
if (IS_ERR(primary))
return PTR_ERR(primary);
- if (vkmsdev->config->overlay) {
- for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
- ret = vkms_add_overlay_plane(vkmsdev, index, crtc);
- if (ret)
- return ret;
- }
- }
-
if (vkmsdev->config->cursor) {
- cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
+ cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR);
if (IS_ERR(cursor))
return PTR_ERR(cursor);
}
- /* [1]: Allocation of a CRTC, its index will be BIT(0) = 1 */
ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
if (ret)
return ret;
+ if (vkmsdev->config->overlay) {
+ for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
+ overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY);
+ if (IS_ERR(overlay)) {
+ DRM_DEV_ERROR(dev->dev, "Failed to init vkms plane\n");
+ ret = PTR_ERR(overlay);
+ goto err_crtc;
+ }
+ overlay->base.possible_crtcs = drm_crtc_mask(crtc);
+ }
+ }
+
ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
if (ret) {
DRM_ERROR("Failed to init connector\n");
- goto err_connector;
+ goto err_crtc;
}
drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
@@ -103,11 +91,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
DRM_ERROR("Failed to init encoder\n");
goto err_encoder;
}
- /*
- * This is a hardcoded value to select crtc for the encoder.
- * BIT(0) here designate the first registered CRTC, the one allocated in [1]
- */
- encoder->possible_crtcs = BIT(0);
+ encoder->possible_crtcs = drm_crtc_mask(crtc);
ret = drm_connector_attach_encoder(connector, encoder);
if (ret) {
@@ -131,7 +115,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
err_encoder:
drm_connector_cleanup(connector);
-err_connector:
+err_crtc:
drm_crtc_cleanup(crtc);
return ret;
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index e5c625ab8e3e..ad137c9a75f5 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -198,12 +198,12 @@ static const struct drm_plane_helper_funcs vkms_plane_helper_funcs = {
};
struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
- enum drm_plane_type type, int index)
+ enum drm_plane_type type)
{
struct drm_device *dev = &vkmsdev->drm;
struct vkms_plane *plane;
- plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index,
+ plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 0,
&vkms_plane_funcs,
vkms_formats, ARRAY_SIZE(vkms_formats),
NULL, type, NULL);
---
base-commit: 33c255312660653cf54f8019896b5dca28e3c580
change-id: 20240906-vkms-remove-index-3a6e04c38e02
Best regards,
