[PATCH V3 2/4] drm/vkms: Add framebuffer and plane helpers

[Daniel Vetter]

On Wed, Jul 11, 2018 at 11:02:01PM -0300, Rodrigo Siqueira wrote:
> This patch appends the minimum helpers related to framebuffer and plane
> to make vkms minimally usable.
> 
> Changes since V1:
> - None
> Changes since V2:
> - Squash "Add plane helper struct" and "Add helper for framebuffer
>   create"
> 
> Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo at gmail.com>
> ---
>  drivers/gpu/drm/vkms/vkms_drv.c   |  3 +++
>  drivers/gpu/drm/vkms/vkms_plane.c | 18 ++++++++++++++++++
>  2 files changed, 21 insertions(+)
> 
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
> index 6ea2fd97bef9..b5d597a42f20 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.c
> +++ b/drivers/gpu/drm/vkms/vkms_drv.c
> @@ -9,6 +9,8 @@
>  #include <drm/drm_gem.h>
>  #include <drm/drm_crtc_helper.h>
>  #include <drm/drm_atomic_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_fb_helper.h>
>  #include "vkms_drv.h"
>  
>  #define DRIVER_NAME	"vkms"
> @@ -69,6 +71,7 @@ static struct drm_driver vkms_driver = {
>  };
>  
>  static const struct drm_mode_config_funcs vkms_mode_funcs = {
> +	.fb_create = drm_gem_fb_create,
>  	.atomic_check = drm_atomic_helper_check,
>  	.atomic_commit = drm_atomic_helper_commit,
>  };
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> index 2c25b1d6ab5b..f7f63143f6d0 100644
> --- a/drivers/gpu/drm/vkms/vkms_plane.c
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -19,6 +19,22 @@ static const struct drm_plane_funcs vkms_plane_funcs = {
>  	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
>  };
>  
> +static int vkms_plane_atomic_check(struct drm_plane *plane,
> +				   struct drm_plane_state *state)
> +{
> +	return 0;
> +}
> +
> +static void vkms_primary_plane_update(struct drm_plane *plane,
> +				      struct drm_plane_state *old_state)
> +{
> +}

I guess I've forgotten to mention this, but the above two functions
implement the default behaviour. Please remove until we're using them. Yes
that means we're just adding an empty function table for now, but I guess
that's required until more of this is filled out.
-Daniel

> +
> +static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
> +	.atomic_check		= vkms_plane_atomic_check,
> +	.atomic_update		= vkms_primary_plane_update,
> +};
> +
>  struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev)
>  {
>  	struct drm_device *dev = &vkmsdev->drm;
> @@ -42,5 +58,7 @@ struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev)
>  		return ERR_PTR(ret);
>  	}
>  
> +	drm_plane_helper_add(plane, &vkms_primary_helper_funcs);
> +
>  	return plane;
>  }
> -- 
> 2.18.0
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch