1// SPDX-License-Identifier: MIT
  2/*
  3 * Copyright © 2023 Intel Corporation
  4 */
  5
  6#include "i915_drv.h"
  7#include "intel_crtc.h"
  8#include "intel_display_types.h"
  9#include "intel_sprite_uapi.h"
 10
 11static bool has_dst_key_in_primary_plane(struct drm_i915_private *dev_priv)
 12{
 13	return DISPLAY_VER(dev_priv) >= 9;
 14}
 15
 16static void intel_plane_set_ckey(struct intel_plane_state *plane_state,
 17				 const struct drm_intel_sprite_colorkey *set)
 18{
 19	struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
 20	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
 21	struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
 22
 23	*key = *set;
 24
 25	/*
 26	 * We want src key enabled on the
 27	 * sprite and not on the primary.
 28	 */
 29	if (plane->id == PLANE_PRIMARY &&
 30	    set->flags & I915_SET_COLORKEY_SOURCE)
 31		key->flags = 0;
 32
 33	/*
 34	 * On SKL+ we want dst key enabled on
 35	 * the primary and not on the sprite.
 36	 */
 37	if (DISPLAY_VER(dev_priv) >= 9 && plane->id != PLANE_PRIMARY &&
 38	    set->flags & I915_SET_COLORKEY_DESTINATION)
 39		key->flags = 0;
 40}
 41
 42int intel_sprite_set_colorkey_ioctl(struct drm_device *dev, void *data,
 43				    struct drm_file *file_priv)
 44{
 45	struct intel_display *display = to_intel_display(dev);
 46	struct drm_i915_private *dev_priv = to_i915(dev);
 47	struct drm_intel_sprite_colorkey *set = data;
 48	struct drm_plane *plane;
 49	struct drm_plane_state *plane_state;
 50	struct drm_atomic_state *state;
 51	struct drm_modeset_acquire_ctx ctx;
 52	int ret = 0;
 53
 54	/* ignore the pointless "none" flag */
 55	set->flags &= ~I915_SET_COLORKEY_NONE;
 56
 57	if (set->flags & ~(I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
 58		return -EINVAL;
 59
 60	/* Make sure we don't try to enable both src & dest simultaneously */
 61	if ((set->flags & (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE)) == (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
 62		return -EINVAL;
 63
 64	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
 65	    set->flags & I915_SET_COLORKEY_DESTINATION)
 66		return -EINVAL;
 67
 68	plane = drm_plane_find(dev, file_priv, set->plane_id);
 69	if (!plane || plane->type != DRM_PLANE_TYPE_OVERLAY)
 70		return -ENOENT;
 71
 72	/*
 73	 * SKL+ only plane 2 can do destination keying against plane 1.
 74	 * Also multiple planes can't do destination keying on the same
 75	 * pipe simultaneously.
 76	 */
 77	if (DISPLAY_VER(dev_priv) >= 9 &&
 78	    to_intel_plane(plane)->id >= PLANE_3 &&
 79	    set->flags & I915_SET_COLORKEY_DESTINATION)
 80		return -EINVAL;
 81
 82	drm_modeset_acquire_init(&ctx, 0);
 83
 84	state = drm_atomic_state_alloc(plane->dev);
 85	if (!state) {
 86		ret = -ENOMEM;
 87		goto out;
 88	}
 89	state->acquire_ctx = &ctx;
 90	to_intel_atomic_state(state)->internal = true;
 91
 92	while (1) {
 93		plane_state = drm_atomic_get_plane_state(state, plane);
 94		ret = PTR_ERR_OR_ZERO(plane_state);
 95		if (!ret)
 96			intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
 97
 98		/*
 99		 * On some platforms we have to configure
100		 * the dst colorkey on the primary plane.
101		 */
102		if (!ret && has_dst_key_in_primary_plane(dev_priv)) {
103			struct intel_crtc *crtc =
104				intel_crtc_for_pipe(display,
105						    to_intel_plane(plane)->pipe);
106
107			plane_state = drm_atomic_get_plane_state(state,
108								 crtc->base.primary);
109			ret = PTR_ERR_OR_ZERO(plane_state);
110			if (!ret)
111				intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
112		}
113
114		if (!ret)
115			ret = drm_atomic_commit(state);
116
117		if (ret != -EDEADLK)
118			break;
119
120		drm_atomic_state_clear(state);
121		drm_modeset_backoff(&ctx);
122	}
123
124	drm_atomic_state_put(state);
125out:
126	drm_modeset_drop_locks(&ctx);
127	drm_modeset_acquire_fini(&ctx);
128	return ret;
129}