1 files changed, 48 insertions, 15 deletions

diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 672fe191e239..00541eff3d1b 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -39,12 +39,8 @@
 struct vkms_frame_info {
 	struct drm_framebuffer *fb;
 	struct drm_rect src, dst;
-	struct drm_rect rotated;
 	struct iosys_map map[DRM_FORMAT_MAX_PLANES];
 	unsigned int rotation;
-	unsigned int offset;
-	unsigned int pitch;
-	unsigned int cpp;
 };
 
 struct pixel_argb_u16 {
@@ -56,23 +52,65 @@ struct line_buffer {
 	struct pixel_argb_u16 *pixels;
 };
 
+/**
+ * typedef pixel_write_t - These functions are used to read a pixel from a
+ * &struct pixel_argb_u16, convert it in a specific format and write it in the @out_pixel
+ * buffer.
+ *
+ * @out_pixel: destination address to write the pixel
+ * @in_pixel: pixel to write
+ */
+typedef void (*pixel_write_t)(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel);
+
 struct vkms_writeback_job {
 	struct iosys_map data[DRM_FORMAT_MAX_PLANES];
 	struct vkms_frame_info wb_frame_info;
-	void (*pixel_write)(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel);
+	pixel_write_t pixel_write;
 };
 
 /**
+ * enum pixel_read_direction - Enum used internally by VKMS to represent a reading direction in a
+ * plane.
+ */
+enum pixel_read_direction {
+	READ_BOTTOM_TO_TOP,
+	READ_TOP_TO_BOTTOM,
+	READ_RIGHT_TO_LEFT,
+	READ_LEFT_TO_RIGHT
+};
+
+struct vkms_plane_state;
+
+/**
+ * typedef pixel_read_line_t - These functions are used to read a pixel line in the source frame,
+ * convert it to `struct pixel_argb_u16` and write it to @out_pixel.
+ *
+ * @plane: plane used as source for the pixel value
+ * @x_start: X (width) coordinate of the first pixel to copy. The caller must ensure that x_start
+ * is non-negative and smaller than @plane->frame_info->fb->width.
+ * @y_start: Y (height) coordinate of the first pixel to copy. The caller must ensure that y_start
+ * is non-negative and smaller than @plane->frame_info->fb->height.
+ * @direction: direction to use for the copy, starting at @x_start/@y_start
+ * @count: number of pixels to copy
+ * @out_pixel: pointer where to write the pixel values. They will be written from @out_pixel[0]
+ * (included) to @out_pixel[@count] (excluded). The caller must ensure that out_pixel have a
+ * length of at least @count.
+ */
+typedef void (*pixel_read_line_t)(const struct vkms_plane_state *plane, int x_start,
+				  int y_start, enum pixel_read_direction direction, int count,
+				  struct pixel_argb_u16 out_pixel[]);
+
+/**
  * struct vkms_plane_state - Driver specific plane state
  * @base: base plane state
  * @frame_info: data required for composing computation
- * @pixel_read: function to read a pixel in this plane. The creator of a struct vkms_plane_state
- *	        must ensure that this pointer is valid
+ * @pixel_read_line: function to read a pixel line in this plane. The creator of a
+ *		     struct vkms_plane_state must ensure that this pointer is valid
  */
 struct vkms_plane_state {
 	struct drm_shadow_plane_state base;
 	struct vkms_frame_info *frame_info;
-	void (*pixel_read)(u8 *src_buffer, struct pixel_argb_u16 *out_pixel);
+	pixel_read_line_t pixel_read_line;
 };
 
 struct vkms_plane {
@@ -212,21 +250,17 @@ 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,
@@ -238,7 +272,6 @@ int vkms_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
 /* Composer Support */
 void vkms_composer_worker(struct work_struct *work);
 void vkms_set_composer(struct vkms_output *out, bool enabled);
-void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state *plane, int y);
 void vkms_writeback_row(struct vkms_writeback_job *wb, const struct line_buffer *src_buffer, int y);
 
 /* Writeback */