drm/armada: add rectangle helpers

Add helpers to convert rectangle width/height and x/y to register
values.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

drivers/gpu/drm/armada/armada_crtc.c

@@ -1158,11 +1158,9 @@ static void armada_drm_primary_update_state(struct drm_plane_state *state,
 				     0, CFG_PDWN64x66, LCD_SPU_SRAM_PARA1);
 
 	dplane->state.ctrl0 = val;
-	dplane->state.src_hw = (drm_rect_height(&state->src) & 0xffff0000) |
-				drm_rect_width(&state->src) >> 16;
-	dplane->state.dst_hw = drm_rect_height(&state->dst) << 16 |
-			       drm_rect_width(&state->dst);
-	dplane->state.dst_yx = state->dst.y1 << 16 | state->dst.x1;
+	dplane->state.src_hw = armada_rect_hw_fp(&state->src);
+	dplane->state.dst_hw = armada_rect_hw(&state->dst);
+	dplane->state.dst_yx = armada_rect_yx(&state->dst);
 
 	armada_drm_gra_plane_regs(regs + idx, &dfb->fb, &dplane->state,
 				  state->src.x1 >> 16, state->src.y1 >> 16,

drivers/gpu/drm/armada/armada_hw.h

@@ -316,4 +316,19 @@ enum {
 	PWRDN_IRQ_LEVEL		= 1 << 0,
 };
 
+static inline u32 armada_rect_hw_fp(struct drm_rect *r)
+{
+	return (drm_rect_height(r) & 0xffff0000) | drm_rect_width(r) >> 16;
+}
+
+static inline u32 armada_rect_hw(struct drm_rect *r)
+{
+	return drm_rect_height(r) << 16 | (drm_rect_width(r) & 0x0000ffff);
+}
+
+static inline u32 armada_rect_yx(struct drm_rect *r)
+{
+	return (r)->y1 << 16 | ((r)->x1 & 0x0000ffff);
+}
+
 #endif

drivers/gpu/drm/armada/armada_overlay.c

@@ -146,22 +146,21 @@ static void armada_ovl_plane_update_state(struct drm_plane_state *state,
 				     LCD_SPU_DMA_PITCH_UV);
 	}
 
-	val = (drm_rect_height(&state->src) & 0xffff0000) |
-	       drm_rect_width(&state->src) >> 16;
+	val = armada_rect_hw_fp(&state->src);
 	if (dplane->base.state.src_hw != val) {
 		dplane->base.state.src_hw = val;
 		armada_reg_queue_set(regs, idx, val,
 				     LCD_SPU_DMA_HPXL_VLN);
 	}
 
-	val = drm_rect_height(&state->dst) << 16 | drm_rect_width(&state->dst);
+	val = armada_rect_hw(&state->dst);
 	if (dplane->base.state.dst_hw != val) {
 		dplane->base.state.dst_hw = val;
 		armada_reg_queue_set(regs, idx, val,
 				     LCD_SPU_DZM_HPXL_VLN);
 	}
 
-	val = state->dst.y1 << 16 | state->dst.x1;
+	val = armada_rect_yx(&state->dst);
 	if (dplane->base.state.dst_yx != val) {
 		dplane->base.state.dst_yx = val;
 		armada_reg_queue_set(regs, idx, val,