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1/* SPDX-License-Identifier: MIT */2/*3 * Copyright © 2021 Intel Corporation4 */5 6#include <drm/drm_framebuffer.h>7 8#include "gem/i915_gem_object.h"9 10#include "i915_drv.h"11#include "intel_fb.h"12#include "intel_fb_bo.h"13 14void intel_fb_bo_framebuffer_fini(struct drm_i915_gem_object *obj)15{16	/* Nothing to do for i915 */17}18 19int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,20				 struct drm_i915_gem_object *obj,21				 struct drm_mode_fb_cmd2 *mode_cmd)22{23	struct drm_i915_private *i915 = to_i915(obj->base.dev);24	unsigned int tiling, stride;25 26	i915_gem_object_lock(obj, NULL);27	tiling = i915_gem_object_get_tiling(obj);28	stride = i915_gem_object_get_stride(obj);29	i915_gem_object_unlock(obj);30 31	if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) {32		/*33		 * If there's a fence, enforce that34		 * the fb modifier and tiling mode match.35		 */36		if (tiling != I915_TILING_NONE &&37		    tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) {38			drm_dbg_kms(&i915->drm,39				    "tiling_mode doesn't match fb modifier\n");40			return -EINVAL;41		}42	} else {43		if (tiling == I915_TILING_X) {44			mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED;45		} else if (tiling == I915_TILING_Y) {46			drm_dbg_kms(&i915->drm,47				    "No Y tiling for legacy addfb\n");48			return -EINVAL;49		}50	}51 52	/*53	 * gen2/3 display engine uses the fence if present,54	 * so the tiling mode must match the fb modifier exactly.55	 */56	if (DISPLAY_VER(i915) < 4 &&57	    tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) {58		drm_dbg_kms(&i915->drm,59			    "tiling_mode must match fb modifier exactly on gen2/3\n");60		return -EINVAL;61	}62 63	/*64	 * If there's a fence, enforce that65	 * the fb pitch and fence stride match.66	 */67	if (tiling != I915_TILING_NONE && mode_cmd->pitches[0] != stride) {68		drm_dbg_kms(&i915->drm,69			    "pitch (%d) must match tiling stride (%d)\n",70			    mode_cmd->pitches[0], stride);71		return -EINVAL;72	}73 74	return 0;75}76 77struct drm_i915_gem_object *78intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,79			    struct drm_file *filp,80			    const struct drm_mode_fb_cmd2 *mode_cmd)81{82	struct drm_i915_gem_object *obj;83 84	obj = i915_gem_object_lookup(filp, mode_cmd->handles[0]);85	if (!obj)86		return ERR_PTR(-ENOENT);87 88	/* object is backed with LMEM for discrete */89	if (HAS_LMEM(i915) && !i915_gem_object_can_migrate(obj, INTEL_REGION_LMEM_0)) {90		/* object is "remote", not in local memory */91		i915_gem_object_put(obj);92		drm_dbg_kms(&i915->drm, "framebuffer must reside in local memory\n");93		return ERR_PTR(-EREMOTE);94	}95 96	return obj;97}98