diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_fbdev_fb.c')
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_fbdev_fb.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev_fb.c b/drivers/gpu/drm/i915/display/intel_fbdev_fb.c new file mode 100644 index 0000000000..717c3a3237 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_fbdev_fb.c @@ -0,0 +1,115 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2023 Intel Corporation + */ + +#include <drm/drm_fb_helper.h> + +#include "gem/i915_gem_lmem.h" + +#include "i915_drv.h" +#include "intel_display_types.h" +#include "intel_fbdev_fb.h" + +struct drm_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper, + struct drm_fb_helper_surface_size *sizes) +{ + struct drm_framebuffer *fb; + struct drm_device *dev = helper->dev; + struct drm_i915_private *dev_priv = to_i915(dev); + struct drm_mode_fb_cmd2 mode_cmd = {}; + struct drm_i915_gem_object *obj; + int size; + + /* we don't do packed 24bpp */ + if (sizes->surface_bpp == 24) + sizes->surface_bpp = 32; + + mode_cmd.width = sizes->surface_width; + mode_cmd.height = sizes->surface_height; + + mode_cmd.pitches[0] = ALIGN(mode_cmd.width * + DIV_ROUND_UP(sizes->surface_bpp, 8), 64); + mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, + sizes->surface_depth); + + size = mode_cmd.pitches[0] * mode_cmd.height; + size = PAGE_ALIGN(size); + + obj = ERR_PTR(-ENODEV); + if (HAS_LMEM(dev_priv)) { + obj = i915_gem_object_create_lmem(dev_priv, size, + I915_BO_ALLOC_CONTIGUOUS | + I915_BO_ALLOC_USER); + } else { + /* + * If the FB is too big, just don't use it since fbdev is not very + * important and we should probably use that space with FBC or other + * features. + * + * Also skip stolen on MTL as Wa_22018444074 mitigation. + */ + if (!(IS_METEORLAKE(dev_priv)) && size * 2 < dev_priv->dsm.usable_size) + obj = i915_gem_object_create_stolen(dev_priv, size); + if (IS_ERR(obj)) + obj = i915_gem_object_create_shmem(dev_priv, size); + } + + if (IS_ERR(obj)) { + drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n", obj); + return ERR_PTR(-ENOMEM); + } + + fb = intel_framebuffer_create(obj, &mode_cmd); + i915_gem_object_put(obj); + + return fb; +} + +int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info, + struct drm_i915_gem_object *obj, struct i915_vma *vma) +{ + struct i915_gem_ww_ctx ww; + void __iomem *vaddr; + int ret; + + if (i915_gem_object_is_lmem(obj)) { + struct intel_memory_region *mem = obj->mm.region; + + /* Use fbdev's framebuffer from lmem for discrete */ + info->fix.smem_start = + (unsigned long)(mem->io_start + + i915_gem_object_get_dma_address(obj, 0)); + info->fix.smem_len = obj->base.size; + } else { + struct i915_ggtt *ggtt = to_gt(i915)->ggtt; + + /* Our framebuffer is the entirety of fbdev's system memory */ + info->fix.smem_start = + (unsigned long)(ggtt->gmadr.start + i915_ggtt_offset(vma)); + info->fix.smem_len = vma->size; + } + + for_i915_gem_ww(&ww, ret, false) { + ret = i915_gem_object_lock(vma->obj, &ww); + + if (ret) + continue; + + vaddr = i915_vma_pin_iomap(vma); + if (IS_ERR(vaddr)) { + drm_err(&i915->drm, + "Failed to remap framebuffer into virtual memory (%pe)\n", vaddr); + ret = PTR_ERR(vaddr); + continue; + } + } + + if (ret) + return ret; + + info->screen_base = vaddr; + info->screen_size = intel_bo_to_drm_bo(obj)->size; + + return 0; +} |