On Tue, Apr 13, 2021 at 04:50:08AM -0300, Melissa Wen wrote:
> By using drmm_universal_plane_alloc instead of
> drm_universal_plane_init, we let the DRM infrastructure handles
> resource allocation and cleanup. We can also get rid of some
> code repetitions for plane cleanup, improving code maintainability
> in vkms.
>
> Signed-off-by: Melissa Wen <melissa....@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vet...@ffwll.ch>
> ---
> drivers/gpu/drm/vkms/vkms_drv.h | 8 ++++++--
> drivers/gpu/drm/vkms/vkms_output.c | 19 +++++--------------
> drivers/gpu/drm/vkms/vkms_plane.c | 29 +++++++++++------------------
> 3 files changed, 22 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
> index 35540c7c4416..70fb79621617 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.h
> +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> @@ -37,6 +37,10 @@ struct vkms_plane_state {
> struct vkms_composer *composer;
> };
>
> +struct vkms_plane {
> + struct drm_plane base;
> +};
> +
> /**
> * vkms_crtc_state - Driver specific CRTC state
> * @base: base CRTC state
> @@ -114,8 +118,8 @@ int vkms_crtc_init(struct drm_device *dev, struct
> drm_crtc *crtc,
>
> 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, int index);
> +struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
> + enum drm_plane_type type, int index);
>
> /* 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 f5f6f15c362c..6979fbc7f821 100644
> --- a/drivers/gpu/drm/vkms/vkms_output.c
> +++ b/drivers/gpu/drm/vkms/vkms_output.c
> @@ -39,7 +39,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int index)
> struct drm_connector *connector = &output->connector;
> struct drm_encoder *encoder = &output->encoder;
> struct drm_crtc *crtc = &output->crtc;
> - struct drm_plane *primary, *cursor = NULL;
> + struct vkms_plane *primary, *cursor = NULL;
> int ret;
> int writeback;
>
> @@ -49,15 +49,13 @@ int vkms_output_init(struct vkms_device *vkmsdev, int
> index)
>
> if (vkmsdev->config->cursor) {
> cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
> - if (IS_ERR(cursor)) {
> - ret = PTR_ERR(cursor);
> - goto err_cursor;
> - }
> + if (IS_ERR(cursor))
> + return PTR_ERR(cursor);
> }
>
> - ret = vkms_crtc_init(dev, crtc, primary, cursor);
> + ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
> if (ret)
> - goto err_crtc;
> + return ret;
>
> ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
> DRM_MODE_CONNECTOR_VIRTUAL);
> @@ -100,12 +98,5 @@ int vkms_output_init(struct vkms_device *vkmsdev, int
> index)
> err_connector:
> drm_crtc_cleanup(crtc);
>
> -err_crtc:
> - if (vkmsdev->config->cursor)
> - drm_plane_cleanup(cursor);
> -
> -err_cursor:
> - drm_plane_cleanup(primary);
> -
> return ret;
> }
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c
> b/drivers/gpu/drm/vkms/vkms_plane.c
> index 6d310d31b75d..135140f8e87a 100644
> --- a/drivers/gpu/drm/vkms/vkms_plane.c
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -86,7 +86,6 @@ static void vkms_plane_reset(struct drm_plane *plane)
> static const struct drm_plane_funcs vkms_plane_funcs = {
> .update_plane = drm_atomic_helper_update_plane,
> .disable_plane = drm_atomic_helper_disable_plane,
> - .destroy = drm_plane_cleanup,
> .reset = vkms_plane_reset,
> .atomic_duplicate_state = vkms_plane_duplicate_state,
> .atomic_destroy_state = vkms_plane_destroy_state,
> @@ -191,18 +190,14 @@ static const struct drm_plane_helper_funcs
> vkms_primary_helper_funcs = {
> .cleanup_fb = vkms_cleanup_fb,
> };
>
> -struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev,
> - enum drm_plane_type type, int index)
> +struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
> + enum drm_plane_type type, int index)
> {
> struct drm_device *dev = &vkmsdev->drm;
> const struct drm_plane_helper_funcs *funcs;
> - struct drm_plane *plane;
> + struct vkms_plane *plane;
> const u32 *formats;
> - int ret, nformats;
> -
> - plane = kzalloc(sizeof(*plane), GFP_KERNEL);
> - if (!plane)
> - return ERR_PTR(-ENOMEM);
> + int nformats;
>
> if (type == DRM_PLANE_TYPE_CURSOR) {
> formats = vkms_cursor_formats;
> @@ -214,16 +209,14 @@ struct drm_plane *vkms_plane_init(struct vkms_device
> *vkmsdev,
> funcs = &vkms_primary_helper_funcs;
> }
>
> - ret = drm_universal_plane_init(dev, plane, 1 << index,
> - &vkms_plane_funcs,
> - formats, nformats,
> - NULL, type, NULL);
> - if (ret) {
> - kfree(plane);
> - return ERR_PTR(ret);
> - }
> + plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 <<
> index,
> + &vkms_plane_funcs,
> + formats, nformats,
> + NULL, type, NULL);
> + if (IS_ERR(plane))
> + return plane;
>
> - drm_plane_helper_add(plane, funcs);
> + drm_plane_helper_add(&plane->base, funcs);
>
> return plane;
> }
> --
> 2.30.2
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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