ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/gpu/drm/drm_plane_helper.c b/marvell/linux/drivers/gpu/drm/drm_plane_helper.c
new file mode 100644
index 0000000..c3f2292
--- /dev/null
+++ b/marvell/linux/drivers/gpu/drm/drm_plane_helper.c
@@ -0,0 +1,248 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * DRM universal plane helper functions
+ *
+ * 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.
+ */
+
+#include <linux/list.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_uapi.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_rect.h>
+
+#define SUBPIXEL_MASK 0xffff
+
+/**
+ * DOC: overview
+ *
+ * This helper library has two parts. The first part has support to implement
+ * primary plane support on top of the normal CRTC configuration interface.
+ * Since the legacy &drm_mode_config_funcs.set_config interface ties the primary
+ * plane together with the CRTC state this does not allow userspace to disable
+ * the primary plane itself. The default primary plane only expose XRBG8888 and
+ * ARGB8888 as valid pixel formats for the attached framebuffer.
+ *
+ * Drivers are highly recommended to implement proper support for primary
+ * planes, and newly merged drivers must not rely upon these transitional
+ * helpers.
+ *
+ * The second part also implements transitional helpers which allow drivers to
+ * gradually switch to the atomic helper infrastructure for plane updates. Once
+ * that switch is complete drivers shouldn't use these any longer, instead using
+ * the proper legacy implementations for update and disable plane hooks provided
+ * by the atomic helpers.
+ *
+ * Again drivers are strongly urged to switch to the new interfaces.
+ *
+ * The plane helpers share the function table structures with other helpers,
+ * specifically also the atomic helpers. See &struct drm_plane_helper_funcs for
+ * the details.
+ */
+
+/*
+ * Returns the connectors currently associated with a CRTC. This function
+ * should be called twice: once with a NULL connector list to retrieve
+ * the list size, and once with the properly allocated list to be filled in.
+ */
+static int get_connectors_for_crtc(struct drm_crtc *crtc,
+ struct drm_connector **connector_list,
+ int num_connectors)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+ int count = 0;
+
+ /*
+ * Note: Once we change the plane hooks to more fine-grained locking we
+ * need to grab the connection_mutex here to be able to make these
+ * checks.
+ */
+ WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
+
+ drm_connector_list_iter_begin(dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+ if (connector->encoder && connector->encoder->crtc == crtc) {
+ if (connector_list != NULL && count < num_connectors)
+ *(connector_list++) = connector;
+
+ count++;
+ }
+ }
+ drm_connector_list_iter_end(&conn_iter);
+
+ return count;
+}
+
+static int drm_plane_helper_check_update(struct drm_plane *plane,
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_rect *src,
+ struct drm_rect *dst,
+ unsigned int rotation,
+ int min_scale,
+ int max_scale,
+ bool can_position,
+ bool can_update_disabled,
+ bool *visible)
+{
+ struct drm_plane_state plane_state = {
+ .plane = plane,
+ .crtc = crtc,
+ .fb = fb,
+ .src_x = src->x1,
+ .src_y = src->y1,
+ .src_w = drm_rect_width(src),
+ .src_h = drm_rect_height(src),
+ .crtc_x = dst->x1,
+ .crtc_y = dst->y1,
+ .crtc_w = drm_rect_width(dst),
+ .crtc_h = drm_rect_height(dst),
+ .rotation = rotation,
+ };
+ struct drm_crtc_state crtc_state = {
+ .crtc = crtc,
+ .enable = crtc->enabled,
+ .mode = crtc->mode,
+ };
+ int ret;
+
+ ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
+ min_scale, max_scale,
+ can_position,
+ can_update_disabled);
+ if (ret)
+ return ret;
+
+ *src = plane_state.src;
+ *dst = plane_state.dst;
+ *visible = plane_state.visible;
+
+ return 0;
+}
+
+static int drm_primary_helper_update(struct drm_plane *plane, struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ int crtc_x, int crtc_y,
+ unsigned int crtc_w, unsigned int crtc_h,
+ uint32_t src_x, uint32_t src_y,
+ uint32_t src_w, uint32_t src_h,
+ struct drm_modeset_acquire_ctx *ctx)
+{
+ struct drm_mode_set set = {
+ .crtc = crtc,
+ .fb = fb,
+ .mode = &crtc->mode,
+ .x = src_x >> 16,
+ .y = src_y >> 16,
+ };
+ struct drm_rect src = {
+ .x1 = src_x,
+ .y1 = src_y,
+ .x2 = src_x + src_w,
+ .y2 = src_y + src_h,
+ };
+ struct drm_rect dest = {
+ .x1 = crtc_x,
+ .y1 = crtc_y,
+ .x2 = crtc_x + crtc_w,
+ .y2 = crtc_y + crtc_h,
+ };
+ struct drm_connector **connector_list;
+ int num_connectors, ret;
+ bool visible;
+
+ ret = drm_plane_helper_check_update(plane, crtc, fb,
+ &src, &dest,
+ DRM_MODE_ROTATE_0,
+ DRM_PLANE_HELPER_NO_SCALING,
+ DRM_PLANE_HELPER_NO_SCALING,
+ false, false, &visible);
+ if (ret)
+ return ret;
+
+ if (!visible)
+ /*
+ * Primary plane isn't visible. Note that unless a driver
+ * provides their own disable function, this will just
+ * wind up returning -EINVAL to userspace.
+ */
+ return plane->funcs->disable_plane(plane, ctx);
+
+ /* Find current connectors for CRTC */
+ num_connectors = get_connectors_for_crtc(crtc, NULL, 0);
+ BUG_ON(num_connectors == 0);
+ connector_list = kcalloc(num_connectors, sizeof(*connector_list),
+ GFP_KERNEL);
+ if (!connector_list)
+ return -ENOMEM;
+ get_connectors_for_crtc(crtc, connector_list, num_connectors);
+
+ set.connectors = connector_list;
+ set.num_connectors = num_connectors;
+
+ /*
+ * We call set_config() directly here rather than using
+ * drm_mode_set_config_internal. We're reprogramming the same
+ * connectors that were already in use, so we shouldn't need the extra
+ * cross-CRTC fb refcounting to accomodate stealing connectors.
+ * drm_mode_setplane() already handles the basic refcounting for the
+ * framebuffers involved in this operation.
+ */
+ ret = crtc->funcs->set_config(&set, ctx);
+
+ kfree(connector_list);
+ return ret;
+}
+
+static int drm_primary_helper_disable(struct drm_plane *plane,
+ struct drm_modeset_acquire_ctx *ctx)
+{
+ return -EINVAL;
+}
+
+/**
+ * drm_primary_helper_destroy() - Helper for primary plane destruction
+ * @plane: plane to destroy
+ *
+ * Provides a default plane destroy handler for primary planes. This handler
+ * is called during CRTC destruction. We disable the primary plane, remove
+ * it from the DRM plane list, and deallocate the plane structure.
+ */
+void drm_primary_helper_destroy(struct drm_plane *plane)
+{
+ drm_plane_cleanup(plane);
+ kfree(plane);
+}
+EXPORT_SYMBOL(drm_primary_helper_destroy);
+
+const struct drm_plane_funcs drm_primary_helper_funcs = {
+ .update_plane = drm_primary_helper_update,
+ .disable_plane = drm_primary_helper_disable,
+ .destroy = drm_primary_helper_destroy,
+};
+EXPORT_SYMBOL(drm_primary_helper_funcs);