drm/i915: Move programming plane scaler to its own function.

This cleans the code up slightly, and will make other changes easier.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180920102711.4184-8-maarten.lankhorst@linux.intel.com
(cherry picked from commit ab5c60bf)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

drivers/gpu/drm/i915/intel_sprite.c

@@ -302,13 +302,63 @@ skl_plane_max_stride(struct intel_plane *plane,
 		return min(8192 * cpp, 32768);
 }
 
+static void
+skl_program_scaler(struct drm_i915_private *dev_priv,
+		   struct intel_plane *plane,
+		   const struct intel_crtc_state *crtc_state,
+		   const struct intel_plane_state *plane_state)
+{
+	enum plane_id plane_id = plane->id;
+	enum pipe pipe = plane->pipe;
+	int scaler_id = plane_state->scaler_id;
+	const struct intel_scaler *scaler =
+		&crtc_state->scaler_state.scalers[scaler_id];
+	int crtc_x = plane_state->base.dst.x1;
+	int crtc_y = plane_state->base.dst.y1;
+	uint32_t crtc_w = drm_rect_width(&plane_state->base.dst);
+	uint32_t crtc_h = drm_rect_height(&plane_state->base.dst);
+	u16 y_hphase, uv_rgb_hphase;
+	u16 y_vphase, uv_rgb_vphase;
+
+	/* Sizes are 0 based */
+	crtc_w--;
+	crtc_h--;
+
+	/* TODO: handle sub-pixel coordinates */
+	if (plane_state->base.fb->format->format == DRM_FORMAT_NV12) {
+		y_hphase = skl_scaler_calc_phase(1, false);
+		y_vphase = skl_scaler_calc_phase(1, false);
+
+		/* MPEG2 chroma siting convention */
+		uv_rgb_hphase = skl_scaler_calc_phase(2, true);
+		uv_rgb_vphase = skl_scaler_calc_phase(2, false);
+	} else {
+		/* not used */
+		y_hphase = 0;
+		y_vphase = 0;
+
+		uv_rgb_hphase = skl_scaler_calc_phase(1, false);
+		uv_rgb_vphase = skl_scaler_calc_phase(1, false);
+	}
+
+	I915_WRITE_FW(SKL_PS_CTRL(pipe, scaler_id),
+		      PS_SCALER_EN | PS_PLANE_SEL(plane_id) | scaler->mode);
+	I915_WRITE_FW(SKL_PS_PWR_GATE(pipe, scaler_id), 0);
+	I915_WRITE_FW(SKL_PS_VPHASE(pipe, scaler_id),
+		      PS_Y_PHASE(y_vphase) | PS_UV_RGB_PHASE(uv_rgb_vphase));
+	I915_WRITE_FW(SKL_PS_HPHASE(pipe, scaler_id),
+		      PS_Y_PHASE(y_hphase) | PS_UV_RGB_PHASE(uv_rgb_hphase));
+	I915_WRITE_FW(SKL_PS_WIN_POS(pipe, scaler_id), (crtc_x << 16) | crtc_y);
+	I915_WRITE_FW(SKL_PS_WIN_SZ(pipe, scaler_id),
+		      ((crtc_w + 1) << 16)|(crtc_h + 1));
+}
+
 void
 skl_update_plane(struct intel_plane *plane,
 		 const struct intel_crtc_state *crtc_state,
 		 const struct intel_plane_state *plane_state)
 {
 	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
-	const struct drm_framebuffer *fb = plane_state->base.fb;
 	enum plane_id plane_id = plane->id;
 	enum pipe pipe = plane->pipe;
 	u32 plane_ctl = plane_state->ctl;
@@ -318,8 +368,6 @@ skl_update_plane(struct intel_plane *plane,
 	u32 aux_stride = skl_plane_stride(plane_state, 1);
 	int crtc_x = plane_state->base.dst.x1;
 	int crtc_y = plane_state->base.dst.y1;
-	uint32_t crtc_w = drm_rect_width(&plane_state->base.dst);
-	uint32_t crtc_h = drm_rect_height(&plane_state->base.dst);
 	uint32_t x = plane_state->color_plane[0].x;
 	uint32_t y = plane_state->color_plane[0].y;
 	uint32_t src_w = drm_rect_width(&plane_state->base.src) >> 16;
@@ -329,8 +377,6 @@ skl_update_plane(struct intel_plane *plane,
 	/* Sizes are 0 based */
 	src_w--;
 	src_h--;
-	crtc_w--;
-	crtc_h--;
 
 	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 
@@ -355,39 +401,7 @@ skl_update_plane(struct intel_plane *plane,
 
 	/* program plane scaler */
 	if (plane_state->scaler_id >= 0) {
-		int scaler_id = plane_state->scaler_id;
-		const struct intel_scaler *scaler =
-			&crtc_state->scaler_state.scalers[scaler_id];
-		u16 y_hphase, uv_rgb_hphase;
-		u16 y_vphase, uv_rgb_vphase;
-
-		/* TODO: handle sub-pixel coordinates */
-		if (fb->format->format == DRM_FORMAT_NV12) {
-			y_hphase = skl_scaler_calc_phase(1, false);
-			y_vphase = skl_scaler_calc_phase(1, false);
-
-			/* MPEG2 chroma siting convention */
-			uv_rgb_hphase = skl_scaler_calc_phase(2, true);
-			uv_rgb_vphase = skl_scaler_calc_phase(2, false);
-		} else {
-			/* not used */
-			y_hphase = 0;
-			y_vphase = 0;
-
-			uv_rgb_hphase = skl_scaler_calc_phase(1, false);
-			uv_rgb_vphase = skl_scaler_calc_phase(1, false);
-		}
-
-		I915_WRITE_FW(SKL_PS_CTRL(pipe, scaler_id),
-			      PS_SCALER_EN | PS_PLANE_SEL(plane_id) | scaler->mode);
-		I915_WRITE_FW(SKL_PS_PWR_GATE(pipe, scaler_id), 0);
-		I915_WRITE_FW(SKL_PS_VPHASE(pipe, scaler_id),
-			      PS_Y_PHASE(y_vphase) | PS_UV_RGB_PHASE(uv_rgb_vphase));
-		I915_WRITE_FW(SKL_PS_HPHASE(pipe, scaler_id),
-			      PS_Y_PHASE(y_hphase) | PS_UV_RGB_PHASE(uv_rgb_hphase));
-		I915_WRITE_FW(SKL_PS_WIN_POS(pipe, scaler_id), (crtc_x << 16) | crtc_y);
-		I915_WRITE_FW(SKL_PS_WIN_SZ(pipe, scaler_id),
-			      ((crtc_w + 1) << 16)|(crtc_h + 1));
+		skl_program_scaler(dev_priv, plane, crtc_state, plane_state);
 
 		I915_WRITE_FW(PLANE_POS(pipe, plane_id), 0);
 	} else {