1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* exynos_drm_fbdev.c 3 * 4 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 5 * Authors: 6 * Inki Dae <inki.dae@samsung.com> 7 * Joonyoung Shim <jy0922.shim@samsung.com> 8 * Seung-Woo Kim <sw0312.kim@samsung.com> 9 */ 10 11 #include <linux/fb.h> 12 13 #include <drm/drm_crtc_helper.h> 14 #include <drm/drm_drv.h> 15 #include <drm/drm_fb_helper.h> 16 #include <drm/drm_framebuffer.h> 17 #include <drm/drm_gem_framebuffer_helper.h> 18 #include <drm/drm_prime.h> 19 #include <drm/drm_print.h> 20 #include <drm/exynos_drm.h> 21 22 #include "exynos_drm_drv.h" 23 #include "exynos_drm_fb.h" 24 #include "exynos_drm_fbdev.h" 25 26 #define MAX_CONNECTOR 4 27 28 static int exynos_drm_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) 29 { 30 struct drm_fb_helper *helper = info->par; 31 struct drm_gem_object *obj = drm_gem_fb_get_obj(helper->fb, 0); 32 33 return drm_gem_prime_mmap(obj, vma); 34 } 35 36 static void exynos_drm_fb_destroy(struct fb_info *info) 37 { 38 struct drm_fb_helper *fb_helper = info->par; 39 struct drm_framebuffer *fb = fb_helper->fb; 40 41 drm_fb_helper_fini(fb_helper); 42 43 drm_framebuffer_remove(fb); 44 45 drm_client_release(&fb_helper->client); 46 } 47 48 static const struct fb_ops exynos_drm_fb_ops = { 49 .owner = THIS_MODULE, 50 __FB_DEFAULT_DMAMEM_OPS_RDWR, 51 DRM_FB_HELPER_DEFAULT_OPS, 52 __FB_DEFAULT_DMAMEM_OPS_DRAW, 53 .fb_mmap = exynos_drm_fb_mmap, 54 .fb_destroy = exynos_drm_fb_destroy, 55 }; 56 57 static int exynos_drm_fbdev_update(struct drm_fb_helper *helper, 58 struct drm_fb_helper_surface_size *sizes, 59 struct exynos_drm_gem *exynos_gem) 60 { 61 struct fb_info *fbi = helper->info; 62 struct drm_framebuffer *fb = helper->fb; 63 unsigned int size = fb->width * fb->height * fb->format->cpp[0]; 64 unsigned long offset; 65 66 fbi->fbops = &exynos_drm_fb_ops; 67 68 drm_fb_helper_fill_info(fbi, helper, sizes); 69 70 offset = fbi->var.xoffset * fb->format->cpp[0]; 71 offset += fbi->var.yoffset * fb->pitches[0]; 72 73 fbi->flags |= FBINFO_VIRTFB; 74 fbi->screen_buffer = exynos_gem->kvaddr + offset; 75 fbi->screen_size = size; 76 fbi->fix.smem_len = size; 77 78 return 0; 79 } 80 81 static const struct drm_fb_helper_funcs exynos_drm_fbdev_helper_funcs = { 82 }; 83 84 int exynos_drm_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper, 85 struct drm_fb_helper_surface_size *sizes) 86 { 87 struct exynos_drm_gem *exynos_gem; 88 struct drm_device *dev = helper->dev; 89 struct drm_mode_fb_cmd2 mode_cmd = { 0 }; 90 unsigned long size; 91 int ret; 92 93 DRM_DEV_DEBUG_KMS(dev->dev, 94 "surface width(%d), height(%d) and bpp(%d\n", 95 sizes->surface_width, sizes->surface_height, 96 sizes->surface_bpp); 97 98 mode_cmd.width = sizes->surface_width; 99 mode_cmd.height = sizes->surface_height; 100 mode_cmd.pitches[0] = sizes->surface_width * (sizes->surface_bpp >> 3); 101 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, 102 sizes->surface_depth); 103 104 size = mode_cmd.pitches[0] * mode_cmd.height; 105 106 exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_WC, size, true); 107 if (IS_ERR(exynos_gem)) 108 return PTR_ERR(exynos_gem); 109 110 helper->fb = 111 exynos_drm_framebuffer_init(dev, 112 drm_get_format_info(dev, mode_cmd.pixel_format, 113 mode_cmd.modifier[0]), 114 &mode_cmd, &exynos_gem, 1); 115 if (IS_ERR(helper->fb)) { 116 DRM_DEV_ERROR(dev->dev, "failed to create drm framebuffer.\n"); 117 ret = PTR_ERR(helper->fb); 118 goto err_destroy_gem; 119 } 120 helper->funcs = &exynos_drm_fbdev_helper_funcs; 121 122 ret = exynos_drm_fbdev_update(helper, sizes, exynos_gem); 123 if (ret < 0) 124 goto err_destroy_framebuffer; 125 126 return 0; 127 128 err_destroy_framebuffer: 129 drm_framebuffer_cleanup(helper->fb); 130 helper->fb = NULL; 131 err_destroy_gem: 132 exynos_drm_gem_destroy(exynos_gem); 133 return ret; 134 } 135