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1/* SPDX-License-Identifier: MIT */2/*3 * Copyright © 2023 Intel Corporation4 */5 6#include <drm/drm_fb_helper.h>7 8#include "gem/i915_gem_lmem.h"9 10#include "i915_drv.h"11#include "intel_display_types.h"12#include "intel_fbdev_fb.h"13 14struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,15 struct drm_fb_helper_surface_size *sizes)16{17 struct drm_framebuffer *fb;18 struct drm_device *dev = helper->dev;19 struct drm_i915_private *dev_priv = to_i915(dev);20 struct drm_mode_fb_cmd2 mode_cmd = {};21 struct drm_i915_gem_object *obj;22 int size;23 24 /* we don't do packed 24bpp */25 if (sizes->surface_bpp == 24)26 sizes->surface_bpp = 32;27 28 mode_cmd.width = sizes->surface_width;29 mode_cmd.height = sizes->surface_height;30 31 mode_cmd.pitches[0] = ALIGN(mode_cmd.width *32 DIV_ROUND_UP(sizes->surface_bpp, 8), 64);33 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,34 sizes->surface_depth);35 36 size = mode_cmd.pitches[0] * mode_cmd.height;37 size = PAGE_ALIGN(size);38 39 obj = ERR_PTR(-ENODEV);40 if (HAS_LMEM(dev_priv)) {41 obj = i915_gem_object_create_lmem(dev_priv, size,42 I915_BO_ALLOC_CONTIGUOUS |43 I915_BO_ALLOC_USER);44 } else {45 /*46 * If the FB is too big, just don't use it since fbdev is not very47 * important and we should probably use that space with FBC or other48 * features.49 *50 * Also skip stolen on MTL as Wa_22018444074 mitigation.51 */52 if (!(IS_METEORLAKE(dev_priv)) && size * 2 < dev_priv->dsm.usable_size)53 obj = i915_gem_object_create_stolen(dev_priv, size);54 if (IS_ERR(obj))55 obj = i915_gem_object_create_shmem(dev_priv, size);56 }57 58 if (IS_ERR(obj)) {59 drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n", obj);60 return ERR_PTR(-ENOMEM);61 }62 63 fb = intel_framebuffer_create(obj, &mode_cmd);64 i915_gem_object_put(obj);65 66 return to_intel_framebuffer(fb);67}68 69int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info,70 struct drm_i915_gem_object *obj, struct i915_vma *vma)71{72 struct i915_gem_ww_ctx ww;73 void __iomem *vaddr;74 int ret;75 76 if (i915_gem_object_is_lmem(obj)) {77 struct intel_memory_region *mem = obj->mm.region;78 79 /* Use fbdev's framebuffer from lmem for discrete */80 info->fix.smem_start =81 (unsigned long)(mem->io.start +82 i915_gem_object_get_dma_address(obj, 0) -83 mem->region.start);84 info->fix.smem_len = obj->base.size;85 } else {86 struct i915_ggtt *ggtt = to_gt(i915)->ggtt;87 88 /* Our framebuffer is the entirety of fbdev's system memory */89 info->fix.smem_start =90 (unsigned long)(ggtt->gmadr.start + i915_ggtt_offset(vma));91 info->fix.smem_len = vma->size;92 }93 94 for_i915_gem_ww(&ww, ret, false) {95 ret = i915_gem_object_lock(vma->obj, &ww);96 97 if (ret)98 continue;99 100 vaddr = i915_vma_pin_iomap(vma);101 if (IS_ERR(vaddr)) {102 drm_err(&i915->drm,103 "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr);104 ret = PTR_ERR(vaddr);105 continue;106 }107 }108 109 if (ret)110 return ret;111 112 info->screen_base = vaddr;113 info->screen_size = intel_bo_to_drm_bo(obj)->size;114 115 return 0;116}117