From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/tegra/fb.c | 403 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 403 insertions(+) create mode 100644 drivers/gpu/drm/tegra/fb.c (limited to 'drivers/gpu/drm/tegra/fb.c') diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c new file mode 100644 index 000000000..01939c57f --- /dev/null +++ b/drivers/gpu/drm/tegra/fb.c @@ -0,0 +1,403 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2012-2013 Avionic Design GmbH + * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. + * + * Based on the KMS/FB CMA helpers + * Copyright (C) 2012 Analog Devices Inc. + */ + +#include + +#include +#include +#include + +#include "drm.h" +#include "gem.h" + +#ifdef CONFIG_DRM_FBDEV_EMULATION +static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper) +{ + return container_of(helper, struct tegra_fbdev, base); +} +#endif + +struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer, + unsigned int index) +{ + return to_tegra_bo(drm_gem_fb_get_obj(framebuffer, index)); +} + +bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer) +{ + struct tegra_bo *bo = tegra_fb_get_plane(framebuffer, 0); + + if (bo->flags & TEGRA_BO_BOTTOM_UP) + return true; + + return false; +} + +int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer, + struct tegra_bo_tiling *tiling) +{ + uint64_t modifier = framebuffer->modifier; + + switch (modifier) { + case DRM_FORMAT_MOD_LINEAR: + tiling->mode = TEGRA_BO_TILING_MODE_PITCH; + tiling->value = 0; + break; + + case DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED: + tiling->mode = TEGRA_BO_TILING_MODE_TILED; + tiling->value = 0; + break; + + case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0): + tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; + tiling->value = 0; + break; + + case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1): + tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; + tiling->value = 1; + break; + + case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2): + tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; + tiling->value = 2; + break; + + case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3): + tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; + tiling->value = 3; + break; + + case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4): + tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; + tiling->value = 4; + break; + + case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5): + tiling->mode = TEGRA_BO_TILING_MODE_BLOCK; + tiling->value = 5; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static const struct drm_framebuffer_funcs tegra_fb_funcs = { + .destroy = drm_gem_fb_destroy, + .create_handle = drm_gem_fb_create_handle, +}; + +static struct drm_framebuffer *tegra_fb_alloc(struct drm_device *drm, + const struct drm_mode_fb_cmd2 *mode_cmd, + struct tegra_bo **planes, + unsigned int num_planes) +{ + struct drm_framebuffer *fb; + unsigned int i; + int err; + + fb = kzalloc(sizeof(*fb), GFP_KERNEL); + if (!fb) + return ERR_PTR(-ENOMEM); + + drm_helper_mode_fill_fb_struct(drm, fb, mode_cmd); + + for (i = 0; i < fb->format->num_planes; i++) + fb->obj[i] = &planes[i]->gem; + + err = drm_framebuffer_init(drm, fb, &tegra_fb_funcs); + if (err < 0) { + dev_err(drm->dev, "failed to initialize framebuffer: %d\n", + err); + kfree(fb); + return ERR_PTR(err); + } + + return fb; +} + +struct drm_framebuffer *tegra_fb_create(struct drm_device *drm, + struct drm_file *file, + const struct drm_mode_fb_cmd2 *cmd) +{ + const struct drm_format_info *info = drm_get_format_info(drm, cmd); + struct tegra_bo *planes[4]; + struct drm_gem_object *gem; + struct drm_framebuffer *fb; + unsigned int i; + int err; + + for (i = 0; i < info->num_planes; i++) { + unsigned int width = cmd->width / (i ? info->hsub : 1); + unsigned int height = cmd->height / (i ? info->vsub : 1); + unsigned int size, bpp; + + gem = drm_gem_object_lookup(file, cmd->handles[i]); + if (!gem) { + err = -ENXIO; + goto unreference; + } + + bpp = info->cpp[i]; + + size = (height - 1) * cmd->pitches[i] + + width * bpp + cmd->offsets[i]; + + if (gem->size < size) { + err = -EINVAL; + goto unreference; + } + + planes[i] = to_tegra_bo(gem); + } + + fb = tegra_fb_alloc(drm, cmd, planes, i); + if (IS_ERR(fb)) { + err = PTR_ERR(fb); + goto unreference; + } + + return fb; + +unreference: + while (i--) + drm_gem_object_put(&planes[i]->gem); + + return ERR_PTR(err); +} + +#ifdef CONFIG_DRM_FBDEV_EMULATION +static int tegra_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + struct drm_fb_helper *helper = info->par; + struct tegra_bo *bo; + int err; + + bo = tegra_fb_get_plane(helper->fb, 0); + + err = drm_gem_mmap_obj(&bo->gem, bo->gem.size, vma); + if (err < 0) + return err; + + return __tegra_gem_mmap(&bo->gem, vma); +} + +static const struct fb_ops tegra_fb_ops = { + .owner = THIS_MODULE, + DRM_FB_HELPER_DEFAULT_OPS, + .fb_fillrect = drm_fb_helper_sys_fillrect, + .fb_copyarea = drm_fb_helper_sys_copyarea, + .fb_imageblit = drm_fb_helper_sys_imageblit, + .fb_mmap = tegra_fb_mmap, +}; + +static int tegra_fbdev_probe(struct drm_fb_helper *helper, + struct drm_fb_helper_surface_size *sizes) +{ + struct tegra_fbdev *fbdev = to_tegra_fbdev(helper); + struct tegra_drm *tegra = helper->dev->dev_private; + struct drm_device *drm = helper->dev; + struct drm_mode_fb_cmd2 cmd = { 0 }; + unsigned int bytes_per_pixel; + struct drm_framebuffer *fb; + unsigned long offset; + struct fb_info *info; + struct tegra_bo *bo; + size_t size; + int err; + + bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8); + + cmd.width = sizes->surface_width; + cmd.height = sizes->surface_height; + cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel, + tegra->pitch_align); + + cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, + sizes->surface_depth); + + size = cmd.pitches[0] * cmd.height; + + bo = tegra_bo_create(drm, size, 0); + if (IS_ERR(bo)) + return PTR_ERR(bo); + + info = drm_fb_helper_alloc_fbi(helper); + if (IS_ERR(info)) { + dev_err(drm->dev, "failed to allocate framebuffer info\n"); + drm_gem_object_put(&bo->gem); + return PTR_ERR(info); + } + + fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1); + if (IS_ERR(fbdev->fb)) { + err = PTR_ERR(fbdev->fb); + dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n", + err); + drm_gem_object_put(&bo->gem); + return PTR_ERR(fbdev->fb); + } + + fb = fbdev->fb; + helper->fb = fb; + helper->fbdev = info; + + info->fbops = &tegra_fb_ops; + + drm_fb_helper_fill_info(info, helper, sizes); + + offset = info->var.xoffset * bytes_per_pixel + + info->var.yoffset * fb->pitches[0]; + + if (bo->pages) { + bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP, + pgprot_writecombine(PAGE_KERNEL)); + if (!bo->vaddr) { + dev_err(drm->dev, "failed to vmap() framebuffer\n"); + err = -ENOMEM; + goto destroy; + } + } + + drm->mode_config.fb_base = (resource_size_t)bo->iova; + info->screen_base = (void __iomem *)bo->vaddr + offset; + info->screen_size = size; + info->fix.smem_start = (unsigned long)(bo->iova + offset); + info->fix.smem_len = size; + + return 0; + +destroy: + drm_framebuffer_remove(fb); + return err; +} + +static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = { + .fb_probe = tegra_fbdev_probe, +}; + +static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm) +{ + struct tegra_fbdev *fbdev; + + fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL); + if (!fbdev) { + dev_err(drm->dev, "failed to allocate DRM fbdev\n"); + return ERR_PTR(-ENOMEM); + } + + drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs); + + return fbdev; +} + +static void tegra_fbdev_free(struct tegra_fbdev *fbdev) +{ + kfree(fbdev); +} + +static int tegra_fbdev_init(struct tegra_fbdev *fbdev, + unsigned int preferred_bpp, + unsigned int num_crtc, + unsigned int max_connectors) +{ + struct drm_device *drm = fbdev->base.dev; + int err; + + err = drm_fb_helper_init(drm, &fbdev->base); + if (err < 0) { + dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n", + err); + return err; + } + + err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp); + if (err < 0) { + dev_err(drm->dev, "failed to set initial configuration: %d\n", + err); + goto fini; + } + + return 0; + +fini: + drm_fb_helper_fini(&fbdev->base); + return err; +} + +static void tegra_fbdev_exit(struct tegra_fbdev *fbdev) +{ + drm_fb_helper_unregister_fbi(&fbdev->base); + + if (fbdev->fb) { + struct tegra_bo *bo = tegra_fb_get_plane(fbdev->fb, 0); + + /* Undo the special mapping we made in fbdev probe. */ + if (bo && bo->pages) { + vunmap(bo->vaddr); + bo->vaddr = NULL; + } + + drm_framebuffer_remove(fbdev->fb); + } + + drm_fb_helper_fini(&fbdev->base); + tegra_fbdev_free(fbdev); +} +#endif + +int tegra_drm_fb_prepare(struct drm_device *drm) +{ +#ifdef CONFIG_DRM_FBDEV_EMULATION + struct tegra_drm *tegra = drm->dev_private; + + tegra->fbdev = tegra_fbdev_create(drm); + if (IS_ERR(tegra->fbdev)) + return PTR_ERR(tegra->fbdev); +#endif + + return 0; +} + +void tegra_drm_fb_free(struct drm_device *drm) +{ +#ifdef CONFIG_DRM_FBDEV_EMULATION + struct tegra_drm *tegra = drm->dev_private; + + tegra_fbdev_free(tegra->fbdev); +#endif +} + +int tegra_drm_fb_init(struct drm_device *drm) +{ +#ifdef CONFIG_DRM_FBDEV_EMULATION + struct tegra_drm *tegra = drm->dev_private; + int err; + + err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc, + drm->mode_config.num_connector); + if (err < 0) + return err; +#endif + + return 0; +} + +void tegra_drm_fb_exit(struct drm_device *drm) +{ +#ifdef CONFIG_DRM_FBDEV_EMULATION + struct tegra_drm *tegra = drm->dev_private; + + tegra_fbdev_exit(tegra->fbdev); +#endif +} -- cgit v1.2.3