// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Red Hat * * based in parts on udlfb.c: * Copyright (C) 2009 Roberto De Ioris * Copyright (C) 2009 Jaya Kumar * Copyright (C) 2009 Bernie Thompson */ #include #include #include #include #include #include #include #include "udl_drv.h" #define DL_ALIGN_UP(x, a) ALIGN(x, a) #define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a) /** Read the red component (0..255) of a 32 bpp colour. */ #define DLO_RGB_GETRED(col) (uint8_t)((col) & 0xFF) /** Read the green component (0..255) of a 32 bpp colour. */ #define DLO_RGB_GETGRN(col) (uint8_t)(((col) >> 8) & 0xFF) /** Read the blue component (0..255) of a 32 bpp colour. */ #define DLO_RGB_GETBLU(col) (uint8_t)(((col) >> 16) & 0xFF) /** Return red/green component of a 16 bpp colour number. */ #define DLO_RG16(red, grn) (uint8_t)((((red) & 0xF8) | ((grn) >> 5)) & 0xFF) /** Return green/blue component of a 16 bpp colour number. */ #define DLO_GB16(grn, blu) (uint8_t)(((((grn) & 0x1C) << 3) | ((blu) >> 3)) & 0xFF) /** Return 8 bpp colour number from red, green and blue components. */ #define DLO_RGB8(red, grn, blu) ((((red) << 5) | (((grn) & 3) << 3) | ((blu) & 7)) & 0xFF) #if 0 static uint8_t rgb8(uint32_t col) { uint8_t red = DLO_RGB_GETRED(col); uint8_t grn = DLO_RGB_GETGRN(col); uint8_t blu = DLO_RGB_GETBLU(col); return DLO_RGB8(red, grn, blu); } static uint16_t rgb16(uint32_t col) { uint8_t red = DLO_RGB_GETRED(col); uint8_t grn = DLO_RGB_GETGRN(col); uint8_t blu = DLO_RGB_GETBLU(col); return (DLO_RG16(red, grn) << 8) + DLO_GB16(grn, blu); } #endif int udl_handle_damage(struct udl_framebuffer *fb, int x, int y, int width, int height) { struct drm_device *dev = fb->base.dev; struct udl_device *udl = to_udl(dev); int i, ret; char *cmd; cycles_t start_cycles, end_cycles; int bytes_sent = 0; int bytes_identical = 0; struct urb *urb; int aligned_x; int log_bpp; BUG_ON(!is_power_of_2(fb->base.format->cpp[0])); log_bpp = __ffs(fb->base.format->cpp[0]); if (!fb->active_16) return 0; if (!fb->shmem->vaddr) { void *vaddr; vaddr = drm_gem_shmem_vmap(&fb->shmem->base); if (IS_ERR(vaddr)) { DRM_ERROR("failed to vmap fb\n"); return 0; } } aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long)); width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long)); x = aligned_x; if ((width <= 0) || (x + width > fb->base.width) || (y + height > fb->base.height)) return -EINVAL; start_cycles = get_cycles(); urb = udl_get_urb(dev); if (!urb) return 0; cmd = urb->transfer_buffer; for (i = y; i < y + height ; i++) { const int line_offset = fb->base.pitches[0] * i; const int byte_offset = line_offset + (x << log_bpp); const int dev_byte_offset = (fb->base.width * i + x) << log_bpp; if (udl_render_hline(dev, log_bpp, &urb, (char *) fb->shmem->vaddr, &cmd, byte_offset, dev_byte_offset, width << log_bpp, &bytes_identical, &bytes_sent)) goto error; } if (cmd > (char *) urb->transfer_buffer) { /* Send partial buffer remaining before exiting */ int len; if (cmd < (char *) urb->transfer_buffer + urb->transfer_buffer_length) *cmd++ = 0xAF; len = cmd - (char *) urb->transfer_buffer; ret = udl_submit_urb(dev, urb, len); bytes_sent += len; } else udl_urb_completion(urb); error: atomic_add(bytes_sent, &udl->bytes_sent); atomic_add(bytes_identical, &udl->bytes_identical); atomic_add((width * height) << log_bpp, &udl->bytes_rendered); end_cycles = get_cycles(); atomic_add(((unsigned int) ((end_cycles - start_cycles) >> 10)), /* Kcycles */ &udl->cpu_kcycles_used); return 0; } static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb, struct drm_file *file, unsigned flags, unsigned color, struct drm_clip_rect *clips, unsigned num_clips) { struct udl_framebuffer *ufb = to_udl_fb(fb); struct dma_buf_attachment *import_attach; int i; int ret = 0; drm_modeset_lock_all(fb->dev); if (!ufb->active_16) goto unlock; import_attach = ufb->shmem->base.import_attach; if (import_attach) { ret = dma_buf_begin_cpu_access(import_attach->dmabuf, DMA_FROM_DEVICE); if (ret) goto unlock; } for (i = 0; i < num_clips; i++) { ret = udl_handle_damage(ufb, clips[i].x1, clips[i].y1, clips[i].x2 - clips[i].x1, clips[i].y2 - clips[i].y1); if (ret) break; } if (import_attach) ret = dma_buf_end_cpu_access(import_attach->dmabuf, DMA_FROM_DEVICE); unlock: drm_modeset_unlock_all(fb->dev); return ret; } static void udl_user_framebuffer_destroy(struct drm_framebuffer *fb) { struct udl_framebuffer *ufb = to_udl_fb(fb); if (ufb->shmem) drm_gem_object_put_unlocked(&ufb->shmem->base); drm_framebuffer_cleanup(fb); kfree(ufb); } static const struct drm_framebuffer_funcs udlfb_funcs = { .destroy = udl_user_framebuffer_destroy, .dirty = udl_user_framebuffer_dirty, }; static int udl_framebuffer_init(struct drm_device *dev, struct udl_framebuffer *ufb, const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_shmem_object *shmem) { int ret; ufb->shmem = shmem; drm_helper_mode_fill_fb_struct(dev, &ufb->base, mode_cmd); ret = drm_framebuffer_init(dev, &ufb->base, &udlfb_funcs); return ret; } struct drm_framebuffer * udl_fb_user_fb_create(struct drm_device *dev, struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) { struct drm_gem_object *obj; struct udl_framebuffer *ufb; int ret; uint32_t size; obj = drm_gem_object_lookup(file, mode_cmd->handles[0]); if (obj == NULL) return ERR_PTR(-ENOENT); size = mode_cmd->pitches[0] * mode_cmd->height; size = ALIGN(size, PAGE_SIZE); if (size > obj->size) { DRM_ERROR("object size not sufficient for fb %d %zu %d %d\n", size, obj->size, mode_cmd->pitches[0], mode_cmd->height); return ERR_PTR(-ENOMEM); } ufb = kzalloc(sizeof(*ufb), GFP_KERNEL); if (ufb == NULL) return ERR_PTR(-ENOMEM); ret = udl_framebuffer_init(dev, ufb, mode_cmd, to_drm_gem_shmem_obj(obj)); if (ret) { kfree(ufb); return ERR_PTR(-EINVAL); } return &ufb->base; }