1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Russell King 4 */ 5 6 #include <drm/drm_modeset_helper.h> 7 #include <drm/drm_fourcc.h> 8 #include <drm/drm_gem_framebuffer_helper.h> 9 10 #include "armada_drm.h" 11 #include "armada_fb.h" 12 #include "armada_gem.h" 13 #include "armada_hw.h" 14 15 static const struct drm_framebuffer_funcs armada_fb_funcs = { 16 .destroy = drm_gem_fb_destroy, 17 .create_handle = drm_gem_fb_create_handle, 18 }; 19 20 struct armada_framebuffer *armada_framebuffer_create(struct drm_device *dev, 21 const struct drm_format_info *info, 22 const struct drm_mode_fb_cmd2 *mode, 23 struct armada_gem_object *obj) 24 { 25 struct armada_framebuffer *dfb; 26 uint8_t format, config; 27 int ret; 28 29 switch (mode->pixel_format) { 30 #define FMT(drm, fmt, mod) \ 31 case DRM_FORMAT_##drm: \ 32 format = CFG_##fmt; \ 33 config = mod; \ 34 break 35 FMT(RGB565, 565, CFG_SWAPRB); 36 FMT(BGR565, 565, 0); 37 FMT(ARGB1555, 1555, CFG_SWAPRB); 38 FMT(ABGR1555, 1555, 0); 39 FMT(RGB888, 888PACK, CFG_SWAPRB); 40 FMT(BGR888, 888PACK, 0); 41 FMT(XRGB8888, X888, CFG_SWAPRB); 42 FMT(XBGR8888, X888, 0); 43 FMT(ARGB8888, 8888, CFG_SWAPRB); 44 FMT(ABGR8888, 8888, 0); 45 FMT(YUYV, 422PACK, CFG_YUV2RGB | CFG_SWAPYU | CFG_SWAPUV); 46 FMT(UYVY, 422PACK, CFG_YUV2RGB); 47 FMT(VYUY, 422PACK, CFG_YUV2RGB | CFG_SWAPUV); 48 FMT(YVYU, 422PACK, CFG_YUV2RGB | CFG_SWAPYU); 49 FMT(YUV422, 422, CFG_YUV2RGB); 50 FMT(YVU422, 422, CFG_YUV2RGB | CFG_SWAPUV); 51 FMT(YUV420, 420, CFG_YUV2RGB); 52 FMT(YVU420, 420, CFG_YUV2RGB | CFG_SWAPUV); 53 FMT(C8, PSEUDO8, 0); 54 #undef FMT 55 default: 56 return ERR_PTR(-EINVAL); 57 } 58 59 dfb = kzalloc(sizeof(*dfb), GFP_KERNEL); 60 if (!dfb) { 61 DRM_ERROR("failed to allocate Armada fb object\n"); 62 return ERR_PTR(-ENOMEM); 63 } 64 65 dfb->fmt = format; 66 dfb->mod = config; 67 dfb->fb.obj[0] = &obj->obj; 68 69 drm_helper_mode_fill_fb_struct(dev, &dfb->fb, info, mode); 70 71 ret = drm_framebuffer_init(dev, &dfb->fb, &armada_fb_funcs); 72 if (ret) { 73 kfree(dfb); 74 return ERR_PTR(ret); 75 } 76 77 /* 78 * Take a reference on our object as we're successful - the 79 * caller already holds a reference, which keeps us safe for 80 * the above call, but the caller will drop their reference 81 * to it. Hence we need to take our own reference. 82 */ 83 drm_gem_object_get(&obj->obj); 84 85 return dfb; 86 } 87 88 struct drm_framebuffer *armada_fb_create(struct drm_device *dev, 89 struct drm_file *dfile, const struct drm_format_info *info, 90 const struct drm_mode_fb_cmd2 *mode) 91 { 92 struct armada_gem_object *obj; 93 struct armada_framebuffer *dfb; 94 int ret; 95 96 DRM_DEBUG_DRIVER("w%u h%u pf%08x f%u p%u,%u,%u\n", 97 mode->width, mode->height, mode->pixel_format, 98 mode->flags, mode->pitches[0], mode->pitches[1], 99 mode->pitches[2]); 100 101 /* We can only handle a single plane at the moment */ 102 if (info->num_planes > 1 && 103 (mode->handles[0] != mode->handles[1] || 104 mode->handles[0] != mode->handles[2])) { 105 ret = -EINVAL; 106 goto err; 107 } 108 109 obj = armada_gem_object_lookup(dfile, mode->handles[0]); 110 if (!obj) { 111 ret = -ENOENT; 112 goto err; 113 } 114 115 if (obj->obj.import_attach && !obj->sgt) { 116 ret = armada_gem_map_import(obj); 117 if (ret) 118 goto err_unref; 119 } 120 121 /* Framebuffer objects must have a valid device address for scanout */ 122 if (!obj->mapped) { 123 ret = -EINVAL; 124 goto err_unref; 125 } 126 127 dfb = armada_framebuffer_create(dev, info, mode, obj); 128 if (IS_ERR(dfb)) { 129 ret = PTR_ERR(dfb); 130 goto err; 131 } 132 133 drm_gem_object_put(&obj->obj); 134 135 return &dfb->fb; 136 137 err_unref: 138 drm_gem_object_put(&obj->obj); 139 err: 140 DRM_ERROR("failed to initialize framebuffer: %d\n", ret); 141 return ERR_PTR(ret); 142 } 143