[PATCH v2 6/7] drm/vkms: add reflect-y property

[Ville Syrjälä]

On Fri, Apr 14, 2023 at 10:51:50AM -0300, Maíra Canal wrote:
> Currently, vkms only support the reflect-x property. Therefore, add the
> reflect-y property to vkms through a software implementation of the
> operation. This is possible by reverse reading the y axis during the
> blending.
> 
> Now, vkms support all possible rotation values.
> 
> Tested with igt at kms_rotation_crc@primary-reflect-y and
> igt at kms_rotation_crc@sprite-reflect-y [1].
> 
> [1] https://patchwork.freedesktop.org/series/116025/
> 
> Signed-off-by: Maíra Canal <mcanal at igalia.com>
> ---
>  drivers/gpu/drm/vkms/vkms_composer.c |  7 ++++++-
>  drivers/gpu/drm/vkms/vkms_plane.c    | 16 ++++------------
>  2 files changed, 10 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
> index b05bd008aeab..19d1078e9d34 100644
> --- a/drivers/gpu/drm/vkms/vkms_composer.c
> +++ b/drivers/gpu/drm/vkms/vkms_composer.c
> @@ -92,8 +92,13 @@ static int get_y_pos(struct vkms_frame_info *frame_info, int y)
>  			return -1;
>  		return y + frame_info->dst.x1;
>  	default:
> -		return y;
> +		break;
>  	}
> +
> +	if (frame_info->rotation & DRM_MODE_REFLECT_Y)
> +		return drm_rect_height(&frame_info->dst) - y - 1;
> +
> +	return y;
>  }
>  
>  static bool check_limit(struct vkms_frame_info *frame_info, int pos)
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> index 11662afa9fe4..d08bda869a24 100644
> --- a/drivers/gpu/drm/vkms/vkms_plane.c
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -121,12 +121,8 @@ static void vkms_plane_atomic_update(struct drm_plane *plane,
>  	frame_info->fb = fb;
>  	memcpy(&frame_info->map, &shadow_plane_state->data, sizeof(frame_info->map));
>  	drm_framebuffer_get(frame_info->fb);
> -	frame_info->rotation = drm_rotation_simplify(new_state->rotation,
> -						     DRM_MODE_ROTATE_0 |
> -						     DRM_MODE_ROTATE_90 |
> -						     DRM_MODE_ROTATE_180 |
> -						     DRM_MODE_ROTATE_270 |
> -						     DRM_MODE_REFLECT_X);
> +	frame_info->rotation = drm_rotation_simplify(new_state->rotation, DRM_MODE_ROTATE_MASK |
> +						     DRM_MODE_REFLECT_MASK);

What are you trying to achieve with that?

-- 
Ville Syrjälä
Intel