--- /dev/null
+/*
+ * 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 Device Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "drm.h"
+#include "gem.h"
+
+static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
+{
+ return container_of(fb, struct tegra_fb, base);
+}
+
+#ifdef CONFIG_DRM_TEGRA_FBDEV
+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)
+{
+ struct tegra_fb *fb = to_tegra_fb(framebuffer);
+
+ if (index >= drm_format_num_planes(framebuffer->pixel_format))
+ return NULL;
+
+ return fb->planes[index];
+}
+
+bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
+{
+ struct tegra_fb *fb = to_tegra_fb(framebuffer);
+
+ if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
+ return true;
+
+ return false;
+}
+
+int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
+ struct tegra_bo_tiling *tiling)
+{
+ struct tegra_fb *fb = to_tegra_fb(framebuffer);
+
+ /* TODO: handle YUV formats? */
+ *tiling = fb->planes[0]->tiling;
+
+ return 0;
+}
+
+static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
+{
+ struct tegra_fb *fb = to_tegra_fb(framebuffer);
+ unsigned int i;
+
+ for (i = 0; i < fb->num_planes; i++) {
+ struct tegra_bo *bo = fb->planes[i];
+
+ if (bo) {
+ if (bo->pages && bo->vaddr)
+ vunmap(bo->vaddr);
+
+ drm_gem_object_unreference_unlocked(&bo->gem);
+ }
+ }
+
+ drm_framebuffer_cleanup(framebuffer);
+ kfree(fb->planes);
+ kfree(fb);
+}
+
+static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
+ struct drm_file *file, unsigned int *handle)
+{
+ struct tegra_fb *fb = to_tegra_fb(framebuffer);
+
+ return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
+}
+
+static struct drm_framebuffer_funcs tegra_fb_funcs = {
+ .destroy = tegra_fb_destroy,
+ .create_handle = tegra_fb_create_handle,
+};
+
+static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
+ struct drm_mode_fb_cmd2 *mode_cmd,
+ struct tegra_bo **planes,
+ unsigned int num_planes)
+{
+ struct tegra_fb *fb;
+ unsigned int i;
+ int err;
+
+ fb = kzalloc(sizeof(*fb), GFP_KERNEL);
+ if (!fb)
+ return ERR_PTR(-ENOMEM);
+
+ fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
+ if (!fb->planes) {
+ kfree(fb);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ fb->num_planes = num_planes;
+
+ drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
+
+ for (i = 0; i < fb->num_planes; i++)
+ fb->planes[i] = planes[i];
+
+ err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
+ if (err < 0) {
+ dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
+ err);
+ kfree(fb->planes);
+ kfree(fb);
+ return ERR_PTR(err);
+ }
+
+ return fb;
+}
+
+struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
+ struct drm_file *file,
+ struct drm_mode_fb_cmd2 *cmd)
+{
+ unsigned int hsub, vsub, i;
+ struct tegra_bo *planes[4];
+ struct drm_gem_object *gem;
+ struct tegra_fb *fb;
+ int err;
+
+ hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
+ vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
+
+ for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
+ unsigned int width = cmd->width / (i ? hsub : 1);
+ unsigned int height = cmd->height / (i ? vsub : 1);
+ unsigned int size, bpp;
+
+ gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
+ if (!gem) {
+ err = -ENXIO;
+ goto unreference;
+ }
+
+ bpp = drm_format_plane_cpp(cmd->pixel_format, 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->base;
+
+unreference:
+ while (i--)
+ drm_gem_object_unreference_unlocked(&planes[i]->gem);
+
+ return ERR_PTR(err);
+}
+
+#ifdef CONFIG_DRM_TEGRA_FBDEV
+static struct fb_ops tegra_fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_fillrect = sys_fillrect,
+ .fb_copyarea = sys_copyarea,
+ .fb_imageblit = sys_imageblit,
+ .fb_check_var = drm_fb_helper_check_var,
+ .fb_set_par = drm_fb_helper_set_par,
+ .fb_blank = drm_fb_helper_blank,
+ .fb_pan_display = drm_fb_helper_pan_display,
+ .fb_setcmap = drm_fb_helper_setcmap,
+};
+
+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 = framebuffer_alloc(0, drm->dev);
+ if (!info) {
+ dev_err(drm->dev, "failed to allocate framebuffer info\n");
+ drm_gem_object_unreference_unlocked(&bo->gem);
+ return -ENOMEM;
+ }
+
+ 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_unreference_unlocked(&bo->gem);
+ goto release;
+ }
+
+ fb = &fbdev->fb->base;
+ helper->fb = fb;
+ helper->fbdev = info;
+
+ info->par = helper;
+ info->flags = FBINFO_FLAG_DEFAULT;
+ info->fbops = &tegra_fb_ops;
+
+ err = fb_alloc_cmap(&info->cmap, 256, 0);
+ if (err < 0) {
+ dev_err(drm->dev, "failed to allocate color map: %d\n", err);
+ goto destroy;
+ }
+
+ drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+ drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
+
+ 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->paddr;
+ info->screen_base = (void __iomem *)bo->vaddr + offset;
+ info->screen_size = size;
+ info->fix.smem_start = (unsigned long)(bo->paddr + offset);
+ info->fix.smem_len = size;
+
+ return 0;
+
+destroy:
+ drm_framebuffer_unregister_private(fb);
+ tegra_fb_destroy(fb);
+release:
+ framebuffer_release(info);
+ 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, num_crtc, max_connectors);
+ if (err < 0) {
+ dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
+ err);
+ return err;
+ }
+
+ err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
+ if (err < 0) {
+ dev_err(drm->dev, "failed to add connectors: %d\n", err);
+ goto fini;
+ }
+
+ 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)
+{
+ struct fb_info *info = fbdev->base.fbdev;
+
+ if (info) {
+ int err;
+
+ err = unregister_framebuffer(info);
+ if (err < 0)
+ DRM_DEBUG_KMS("failed to unregister framebuffer\n");
+
+ if (info->cmap.len)
+ fb_dealloc_cmap(&info->cmap);
+
+ framebuffer_release(info);
+ }
+
+ if (fbdev->fb) {
+ drm_framebuffer_unregister_private(&fbdev->fb->base);
+ drm_framebuffer_remove(&fbdev->fb->base);
+ }
+
+ drm_fb_helper_fini(&fbdev->base);
+ tegra_fbdev_free(fbdev);
+}
+
+void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
+{
+ if (fbdev)
+ drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
+}
+
+void tegra_fb_output_poll_changed(struct drm_device *drm)
+{
+ struct tegra_drm *tegra = drm->dev_private;
+
+ if (tegra->fbdev)
+ drm_fb_helper_hotplug_event(&tegra->fbdev->base);
+}
+#endif
+
+int tegra_drm_fb_prepare(struct drm_device *drm)
+{
+#ifdef CONFIG_DRM_TEGRA_FBDEV
+ 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_TEGRA_FBDEV
+ 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_TEGRA_FBDEV
+ 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_TEGRA_FBDEV
+ struct tegra_drm *tegra = drm->dev_private;
+
+ tegra_fbdev_exit(tegra->fbdev);
+#endif
+}
Code Review / kvmfornfv.git / blobdiff