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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2023 Intel Corporation4 */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 the27	 * 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 on35	 * 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 same74	 * pipe simultaneously.75	 */76	if (DISPLAY_VER(dev_priv) >= 9 &&77	    to_intel_plane(plane)->id >= PLANE_3 &&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 configure99		 * 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}129