drm/i915: Extract per-platform plane->check() functions

Split up intel_check_primary_plane() and intel_check_sprite_plane()
into per-platform variants. This way we can get a unified behaviour
between the SKL universal planes, and we stop checking for non-SKL
specific scaling limits for the "sprite" planes. And we now get
a natural place where to add more plarform specific checks.

v2: Split the .check_plane() calling convention change out (José)
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180907152413.15761-10-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -3355,6 +3355,36 @@ int i9xx_check_plane_surface(struct intel_plane_state *plane_state)
 	return 0;
 }
 
+static int
+i9xx_plane_check(struct intel_crtc_state *crtc_state,
+		 struct intel_plane_state *plane_state)
+{
+	int ret;
+
+	ret = drm_atomic_helper_check_plane_state(&plane_state->base,
+						  &crtc_state->base,
+						  DRM_PLANE_HELPER_NO_SCALING,
+						  DRM_PLANE_HELPER_NO_SCALING,
+						  false, true);
+	if (ret)
+		return ret;
+
+	if (!plane_state->base.visible)
+		return 0;
+
+	ret = intel_plane_check_src_coordinates(plane_state);
+	if (ret)
+		return ret;
+
+	ret = i9xx_check_plane_surface(plane_state);
+	if (ret)
+		return ret;
+
+	plane_state->ctl = i9xx_plane_ctl(crtc_state, plane_state);
+
+	return 0;
+}
+
 static void i9xx_update_plane(struct intel_plane *plane,
 			      const struct intel_crtc_state *crtc_state,
 			      const struct intel_plane_state *plane_state)
@@ -9691,6 +9721,11 @@ static int intel_check_cursor(struct intel_crtc_state *crtc_state,
 	u32 offset;
 	int ret;
 
+	if (fb && fb->modifier != DRM_FORMAT_MOD_LINEAR) {
+		DRM_DEBUG_KMS("cursor cannot be tiled\n");
+		return -EINVAL;
+	}
+
 	ret = drm_atomic_helper_check_plane_state(&plane_state->base,
 						  &crtc_state->base,
 						  DRM_PLANE_HELPER_NO_SCALING,
@@ -9699,13 +9734,12 @@ static int intel_check_cursor(struct intel_crtc_state *crtc_state,
 	if (ret)
 		return ret;
 
-	if (!fb)
+	if (!plane_state->base.visible)
 		return 0;
 
-	if (fb->modifier != DRM_FORMAT_MOD_LINEAR) {
-		DRM_DEBUG_KMS("cursor cannot be tiled\n");
-		return -EINVAL;
-	}
+	ret = intel_plane_check_src_coordinates(plane_state);
+	if (ret)
+		return ret;
 
 	intel_fill_fb_ggtt_view(&plane_state->view, fb, rotation);
 	plane_state->color_plane[0].stride = intel_fb_pitch(fb, 0, rotation);
@@ -13230,19 +13264,17 @@ intel_cleanup_plane_fb(struct drm_plane *plane,
 }
 
 int
-skl_max_scale(struct intel_crtc *intel_crtc,
-	      struct intel_crtc_state *crtc_state,
-	      uint32_t pixel_format)
+skl_max_scale(const struct intel_crtc_state *crtc_state,
+	      u32 pixel_format)
 {
-	struct drm_i915_private *dev_priv;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	int max_scale, mult;
 	int crtc_clock, max_dotclk, tmpclk1, tmpclk2;
 
-	if (!intel_crtc || !crtc_state->base.enable)
+	if (!crtc_state->base.enable)
 		return DRM_PLANE_HELPER_NO_SCALING;
 
-	dev_priv = to_i915(intel_crtc->base.dev);
-
 	crtc_clock = crtc_state->base.adjusted_mode.crtc_clock;
 	max_dotclk = to_intel_atomic_state(crtc_state->base.state)->cdclk.logical.cdclk;
 
@@ -13266,61 +13298,6 @@ skl_max_scale(struct intel_crtc *intel_crtc,
 	return max_scale;
 }
 
-static int
-intel_check_primary_plane(struct intel_crtc_state *crtc_state,
-			  struct intel_plane_state *state)
-{
-	struct intel_plane *plane = to_intel_plane(state->base.plane);
-	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
-	struct drm_crtc *crtc = state->base.crtc;
-	int min_scale = DRM_PLANE_HELPER_NO_SCALING;
-	int max_scale = DRM_PLANE_HELPER_NO_SCALING;
-	bool can_position = false;
-	int ret;
-	uint32_t pixel_format = 0;
-
-	if (INTEL_GEN(dev_priv) >= 9) {
-		/* use scaler when colorkey is not required */
-		if (!state->ckey.flags) {
-			min_scale = 1;
-			if (state->base.fb)
-				pixel_format = state->base.fb->format->format;
-			max_scale = skl_max_scale(to_intel_crtc(crtc),
-						  crtc_state, pixel_format);
-		}
-		can_position = true;
-	}
-
-	ret = drm_atomic_helper_check_plane_state(&state->base,
-						  &crtc_state->base,
-						  min_scale, max_scale,
-						  can_position, true);
-	if (ret)
-		return ret;
-
-	if (!state->base.fb)
-		return 0;
-
-	if (INTEL_GEN(dev_priv) >= 9) {
-		ret = skl_check_plane_surface(crtc_state, state);
-		if (ret)
-			return ret;
-
-		state->ctl = skl_plane_ctl(crtc_state, state);
-	} else {
-		ret = i9xx_check_plane_surface(state);
-		if (ret)
-			return ret;
-
-		state->ctl = i9xx_plane_ctl(crtc_state, state);
-	}
-
-	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
-		state->color_ctl = glk_plane_color_ctl(crtc_state, state);
-
-	return 0;
-}
-
 static void intel_begin_crtc_commit(struct drm_crtc *crtc,
 				    struct drm_crtc_state *old_crtc_state)
 {
@@ -13770,8 +13747,6 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 		fbc->possible_framebuffer_bits |= primary->frontbuffer_bit;
 	}
 
-	primary->check_plane = intel_check_primary_plane;
-
 	if (INTEL_GEN(dev_priv) >= 9) {
 		primary->has_ccs = skl_plane_has_ccs(dev_priv, pipe,
 						     PLANE_PRIMARY);
@@ -13793,6 +13768,7 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 		primary->update_plane = skl_update_plane;
 		primary->disable_plane = skl_disable_plane;
 		primary->get_hw_state = skl_plane_get_hw_state;
+		primary->check_plane = skl_plane_check;
 
 		plane_funcs = &skl_plane_funcs;
 	} else if (INTEL_GEN(dev_priv) >= 4) {
@@ -13804,6 +13780,7 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 		primary->update_plane = i9xx_update_plane;
 		primary->disable_plane = i9xx_disable_plane;
 		primary->get_hw_state = i9xx_plane_get_hw_state;
+		primary->check_plane = i9xx_plane_check;
 
 		plane_funcs = &i965_plane_funcs;
 	} else {
@@ -13815,6 +13792,7 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 		primary->update_plane = i9xx_update_plane;
 		primary->disable_plane = i9xx_disable_plane;
 		primary->get_hw_state = i9xx_plane_get_hw_state;
+		primary->check_plane = i9xx_plane_check;
 
 		plane_funcs = &i8xx_plane_funcs;
 	}

drivers/gpu/drm/i915/intel_drv.h

@@ -1645,8 +1645,8 @@ void intel_crtc_arm_fifo_underrun(struct intel_crtc *crtc,
 
 u16 skl_scaler_calc_phase(int sub, bool chroma_center);
 int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state);
-int skl_max_scale(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
-		  uint32_t pixel_format);
+int skl_max_scale(const struct intel_crtc_state *crtc_state,
+		  u32 pixel_format);
 
 static inline u32 intel_plane_ggtt_offset(const struct intel_plane_state *state)
 {
@@ -2137,7 +2137,9 @@ bool skl_plane_has_planar(struct drm_i915_private *dev_priv,
 unsigned int skl_plane_max_stride(struct intel_plane *plane,
 				  u32 pixel_format, u64 modifier,
 				  unsigned int rotation);
-
+int skl_plane_check(struct intel_crtc_state *crtc_state,
+		    struct intel_plane_state *plane_state);
+int intel_plane_check_src_coordinates(struct intel_plane_state *plane_state);
 
 /* intel_tv.c */
 void intel_tv_init(struct drm_i915_private *dev_priv);