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775d0adc01
As per recommendation in the workarounds:
WA_22019338487
There is an issue with accessing Stolen memory pages due a
hardware limitation. Limit the usage of stolen memory for
fbdev for LNL+. Don't use BIOS FB from stolen on LNL+ and
assign the same from system memory.
v2: Corrected the WA Number, limited WA to LNL and
Adopted XE_WA framework as suggested by Lucas and Matt.
v3: Introduced the waxxx_display to implement display side
of WA changes on Lunarlake. Used xe_root_mmio_gt and
avoid the for loop (Suggested by Lucas)
v4: Fixed some nits (Luca)
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240717082252.3875909-1-uma.shankar@intel.com
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2023 Intel Corporation
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*/
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#include <drm/drm_fb_helper.h>
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#include "intel_display_types.h"
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#include "intel_fbdev_fb.h"
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#include "xe_bo.h"
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#include "xe_gt.h"
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#include "xe_ttm_stolen_mgr.h"
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#include "xe_wa.h"
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#include <generated/xe_wa_oob.h>
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struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct drm_framebuffer *fb;
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struct drm_device *dev = helper->dev;
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struct xe_device *xe = to_xe_device(dev);
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struct drm_mode_fb_cmd2 mode_cmd = {};
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struct drm_i915_gem_object *obj;
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int size;
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/* we don't do packed 24bpp */
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if (sizes->surface_bpp == 24)
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sizes->surface_bpp = 32;
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mode_cmd.width = sizes->surface_width;
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mode_cmd.height = sizes->surface_height;
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mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
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DIV_ROUND_UP(sizes->surface_bpp, 8), XE_PAGE_SIZE);
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mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = mode_cmd.pitches[0] * mode_cmd.height;
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size = PAGE_ALIGN(size);
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obj = ERR_PTR(-ENODEV);
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if (!IS_DGFX(xe) && !XE_WA(xe_root_mmio_gt(xe), 22019338487_display)) {
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obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe),
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NULL, size,
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ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
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XE_BO_FLAG_STOLEN |
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XE_BO_FLAG_PINNED);
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if (!IS_ERR(obj))
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drm_info(&xe->drm, "Allocated fbdev into stolen\n");
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else
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drm_info(&xe->drm, "Allocated fbdev into stolen failed: %li\n", PTR_ERR(obj));
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}
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if (IS_ERR(obj)) {
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obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe), NULL, size,
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ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
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XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(xe)) |
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XE_BO_FLAG_PINNED);
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}
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if (IS_ERR(obj)) {
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drm_err(&xe->drm, "failed to allocate framebuffer (%pe)\n", obj);
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fb = ERR_PTR(-ENOMEM);
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goto err;
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}
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fb = intel_framebuffer_create(obj, &mode_cmd);
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if (IS_ERR(fb)) {
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xe_bo_unpin_map_no_vm(obj);
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goto err;
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}
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drm_gem_object_put(intel_bo_to_drm_bo(obj));
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return to_intel_framebuffer(fb);
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err:
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return ERR_CAST(fb);
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}
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int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info,
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struct drm_i915_gem_object *obj, struct i915_vma *vma)
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{
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struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
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if (!(obj->flags & XE_BO_FLAG_SYSTEM)) {
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if (obj->flags & XE_BO_FLAG_STOLEN)
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info->fix.smem_start = xe_ttm_stolen_io_offset(obj, 0);
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else
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info->fix.smem_start =
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pci_resource_start(pdev, 2) +
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xe_bo_addr(obj, 0, XE_PAGE_SIZE);
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info->fix.smem_len = obj->ttm.base.size;
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} else {
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/* XXX: Pure fiction, as the BO may not be physically accessible.. */
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info->fix.smem_start = 0;
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info->fix.smem_len = obj->ttm.base.size;
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}
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XE_WARN_ON(iosys_map_is_null(&obj->vmap));
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info->screen_base = obj->vmap.vaddr_iomem;
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info->screen_size = intel_bo_to_drm_bo(obj)->size;
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return 0;
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}
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