1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
new file mode 100644
index 000000000..dcba645ca
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * DOC: atomic plane helpers
+ *
+ * The functions here are used by the atomic plane helper functions to
+ * implement legacy plane updates (i.e., drm_plane->update_plane() and
+ * drm_plane->disable_plane()).  This allows plane updates to use the
+ * atomic state infrastructure and perform plane updates as separate
+ * prepare/check/commit/cleanup steps.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_plane_helper.h>
+#include "intel_drv.h"
+
+/**
+ * intel_create_plane_state - create plane state object
+ * @plane: drm plane
+ *
+ * Allocates a fresh plane state for the given plane and sets some of
+ * the state values to sensible initial values.
+ *
+ * Returns: A newly allocated plane state, or NULL on failure
+ */
+struct intel_plane_state *
+intel_create_plane_state(struct drm_plane *plane)
+{
+	struct intel_plane_state *state;
+
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (!state)
+		return NULL;
+
+	state->base.plane = plane;
+	state->base.rotation = DRM_MODE_ROTATE_0;
+
+	return state;
+}
+
+/**
+ * intel_plane_duplicate_state - duplicate plane state
+ * @plane: drm plane
+ *
+ * Allocates and returns a copy of the plane state (both common and
+ * Intel-specific) for the specified plane.
+ *
+ * Returns: The newly allocated plane state, or NULL on failure.
+ */
+struct drm_plane_state *
+intel_plane_duplicate_state(struct drm_plane *plane)
+{
+	struct drm_plane_state *state;
+	struct intel_plane_state *intel_state;
+
+	intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);
+
+	if (!intel_state)
+		return NULL;
+
+	state = &intel_state->base;
+
+	__drm_atomic_helper_plane_duplicate_state(plane, state);
+
+	intel_state->vma = NULL;
+	intel_state->flags = 0;
+
+	return state;
+}
+
+/**
+ * intel_plane_destroy_state - destroy plane state
+ * @plane: drm plane
+ * @state: state object to destroy
+ *
+ * Destroys the plane state (both common and Intel-specific) for the
+ * specified plane.
+ */
+void
+intel_plane_destroy_state(struct drm_plane *plane,
+			  struct drm_plane_state *state)
+{
+	WARN_ON(to_intel_plane_state(state)->vma);
+
+	drm_atomic_helper_plane_destroy_state(plane, state);
+}
+
+int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_state,
+					struct intel_crtc_state *crtc_state,
+					const struct intel_plane_state *old_plane_state,
+					struct intel_plane_state *intel_state)
+{
+	struct drm_plane *plane = intel_state->base.plane;
+	struct drm_i915_private *dev_priv = to_i915(plane->dev);
+	struct drm_plane_state *state = &intel_state->base;
+	struct intel_plane *intel_plane = to_intel_plane(plane);
+	const struct drm_display_mode *adjusted_mode =
+		&crtc_state->base.adjusted_mode;
+	int ret;
+
+	if (!intel_state->base.crtc && !old_plane_state->base.crtc)
+		return 0;
+
+	if (state->fb && drm_rotation_90_or_270(state->rotation)) {
+		struct drm_format_name_buf format_name;
+
+		if (state->fb->modifier != I915_FORMAT_MOD_Y_TILED &&
+		    state->fb->modifier != I915_FORMAT_MOD_Yf_TILED) {
+			DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");
+			return -EINVAL;
+		}
+
+		/*
+		 * 90/270 is not allowed with RGB64 16:16:16:16,
+		 * RGB 16-bit 5:6:5, and Indexed 8-bit.
+		 * TBD: Add RGB64 case once its added in supported format list.
+		 */
+		switch (state->fb->format->format) {
+		case DRM_FORMAT_C8:
+		case DRM_FORMAT_RGB565:
+			DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
+			              drm_get_format_name(state->fb->format->format,
+			                                  &format_name));
+			return -EINVAL;
+
+		default:
+			break;
+		}
+	}
+
+	/* CHV ignores the mirror bit when the rotate bit is set :( */
+	if (IS_CHERRYVIEW(dev_priv) &&
+	    state->rotation & DRM_MODE_ROTATE_180 &&
+	    state->rotation & DRM_MODE_REFLECT_X) {
+		DRM_DEBUG_KMS("Cannot rotate and reflect at the same time\n");
+		return -EINVAL;
+	}
+
+	intel_state->base.visible = false;
+	ret = intel_plane->check_plane(intel_plane, crtc_state, intel_state);
+	if (ret)
+		return ret;
+
+	/*
+	 * Y-tiling is not supported in IF-ID Interlace mode in
+	 * GEN9 and above.
+	 */
+	if (state->fb && INTEL_GEN(dev_priv) >= 9 && crtc_state->base.enable &&
+	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
+		if (state->fb->modifier == I915_FORMAT_MOD_Y_TILED ||
+		    state->fb->modifier == I915_FORMAT_MOD_Yf_TILED) {
+			DRM_DEBUG_KMS("Y/Yf tiling not supported in IF-ID mode\n");
+			return -EINVAL;
+		}
+	}
+
+	/* FIXME pre-g4x don't work like this */
+	if (state->visible)
+		crtc_state->active_planes |= BIT(intel_plane->id);
+	else
+		crtc_state->active_planes &= ~BIT(intel_plane->id);
+
+	if (state->visible && state->fb->format->format == DRM_FORMAT_NV12)
+		crtc_state->nv12_planes |= BIT(intel_plane->id);
+	else
+		crtc_state->nv12_planes &= ~BIT(intel_plane->id);
+
+	return intel_plane_atomic_calc_changes(old_crtc_state,
+					       &crtc_state->base,
+					       old_plane_state,
+					       state);
+}
+
+static int intel_plane_atomic_check(struct drm_plane *plane,
+				    struct drm_plane_state *new_plane_state)
+{
+	struct drm_atomic_state *state = new_plane_state->state;
+	const struct drm_plane_state *old_plane_state =
+		drm_atomic_get_old_plane_state(state, plane);
+	struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
+	const struct drm_crtc_state *old_crtc_state;
+	struct drm_crtc_state *new_crtc_state;
+
+	if (!crtc)
+		return 0;
+
+	old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
+	new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	return intel_plane_atomic_check_with_state(to_intel_crtc_state(old_crtc_state),
+						   to_intel_crtc_state(new_crtc_state),
+						   to_intel_plane_state(old_plane_state),
+						   to_intel_plane_state(new_plane_state));
+}
+
+static void intel_plane_atomic_update(struct drm_plane *plane,
+				      struct drm_plane_state *old_state)
+{
+	struct intel_atomic_state *state = to_intel_atomic_state(old_state->state);
+	struct intel_plane *intel_plane = to_intel_plane(plane);
+	const struct intel_plane_state *new_plane_state =
+		intel_atomic_get_new_plane_state(state, intel_plane);
+	struct drm_crtc *crtc = new_plane_state->base.crtc ?: old_state->crtc;
+
+	if (new_plane_state->base.visible) {
+		const struct intel_crtc_state *new_crtc_state =
+			intel_atomic_get_new_crtc_state(state, to_intel_crtc(crtc));
+
+		trace_intel_update_plane(plane,
+					 to_intel_crtc(crtc));
+
+		intel_plane->update_plane(intel_plane,
+					  new_crtc_state, new_plane_state);
+	} else {
+		trace_intel_disable_plane(plane,
+					  to_intel_crtc(crtc));
+
+		intel_plane->disable_plane(intel_plane, to_intel_crtc(crtc));
+	}
+}
+
+const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
+	.prepare_fb = intel_prepare_plane_fb,
+	.cleanup_fb = intel_cleanup_plane_fb,
+	.atomic_check = intel_plane_atomic_check,
+	.atomic_update = intel_plane_atomic_update,
+};
+
+/**
+ * intel_plane_atomic_get_property - fetch plane property value
+ * @plane: plane to fetch property for
+ * @state: state containing the property value
+ * @property: property to look up
+ * @val: pointer to write property value into
+ *
+ * The DRM core does not store shadow copies of properties for
+ * atomic-capable drivers.  This entrypoint is used to fetch
+ * the current value of a driver-specific plane property.
+ */
+int
+intel_plane_atomic_get_property(struct drm_plane *plane,
+				const struct drm_plane_state *state,
+				struct drm_property *property,
+				uint64_t *val)
+{
+	DRM_DEBUG_KMS("Unknown property [PROP:%d:%s]\n",
+		      property->base.id, property->name);
+	return -EINVAL;
+}
+
+/**
+ * intel_plane_atomic_set_property - set plane property value
+ * @plane: plane to set property for
+ * @state: state to update property value in
+ * @property: property to set
+ * @val: value to set property to
+ *
+ * Writes the specified property value for a plane into the provided atomic
+ * state object.
+ *
+ * Returns 0 on success, -EINVAL on unrecognized properties
+ */
+int
+intel_plane_atomic_set_property(struct drm_plane *plane,
+				struct drm_plane_state *state,
+				struct drm_property *property,
+				uint64_t val)
+{
+	DRM_DEBUG_KMS("Unknown property [PROP:%d:%s]\n",
+		      property->base.id, property->name);
+	return -EINVAL;
+}