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 drm_i915_private *dev_priv = to_i915(dev);
 46	struct drm_intel_sprite_colorkey *set = data;
 47	struct drm_plane *plane;
 48	struct drm_plane_state *plane_state;
 49	struct drm_atomic_state *state;
 50	struct drm_modeset_acquire_ctx ctx;
 51	int ret = 0;
 52
 53	/* ignore the pointless "none" flag */
 54	set->flags &= ~I915_SET_COLORKEY_NONE;
 55
 56	if (set->flags & ~(I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
 57		return -EINVAL;
 58
 59	/* Make sure we don't try to enable both src & dest simultaneously */
 60	if ((set->flags & (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE)) == (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
 61		return -EINVAL;
 62
 63	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
 64	    set->flags & I915_SET_COLORKEY_DESTINATION)
 65		return -EINVAL;
 66
 67	plane = drm_plane_find(dev, file_priv, set->plane_id);
 68	if (!plane || plane->type != DRM_PLANE_TYPE_OVERLAY)
 69		return -ENOENT;
 70
 71	/*
 72	 * SKL+ only plane 2 can do destination keying against plane 1.
 73	 * Also multiple planes can't do destination keying on the same
 74	 * pipe simultaneously.
 75	 */
 76	if (DISPLAY_VER(dev_priv) >= 9 &&
 77	    to_intel_plane(plane)->id >= PLANE_SPRITE1 &&
 78	    set->flags & I915_SET_COLORKEY_DESTINATION)
 79		return -EINVAL;
 80
 81	drm_modeset_acquire_init(&ctx, 0);
 82
 83	state = drm_atomic_state_alloc(plane->dev);
 84	if (!state) {
 85		ret = -ENOMEM;
 86		goto out;
 87	}
 88	state->acquire_ctx = &ctx;
 89	to_intel_atomic_state(state)->internal = true;
 90
 91	while (1) {
 92		plane_state = drm_atomic_get_plane_state(state, plane);
 93		ret = PTR_ERR_OR_ZERO(plane_state);
 94		if (!ret)
 95			intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
 96
 97		/*
 98		 * On some platforms we have to configure
 99		 * the dst colorkey on the primary plane.
100		 */
101		if (!ret && has_dst_key_in_primary_plane(dev_priv)) {
102			struct intel_crtc *crtc =
103				intel_crtc_for_pipe(dev_priv,
104						    to_intel_plane(plane)->pipe);
105
106			plane_state = drm_atomic_get_plane_state(state,
107								 crtc->base.primary);
108			ret = PTR_ERR_OR_ZERO(plane_state);
109			if (!ret)
110				intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
111		}
112
113		if (!ret)
114			ret = drm_atomic_commit(state);
115
116		if (ret != -EDEADLK)
117			break;
118
119		drm_atomic_state_clear(state);
120		drm_modeset_backoff(&ctx);
121	}
122
123	drm_atomic_state_put(state);
124out:
125	drm_modeset_drop_locks(&ctx);
126	drm_modeset_acquire_fini(&ctx);
127	return ret;
128}