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 #include <drm/drm_print.h> 10 11 #include "armada_drm.h" 12 #include "armada_fb.h" 13 #include "armada_gem.h" 14 #include "armada_hw.h" 15 16 static const struct drm_framebuffer_funcs armada_fb_funcs = { 17 .destroy = drm_gem_fb_destroy, 18 .create_handle = drm_gem_fb_create_handle, 19 }; 20 21 struct armada_framebuffer *armada_framebuffer_create(struct drm_device *dev, 22 const struct drm_format_info *info, 23 const struct drm_mode_fb_cmd2 *mode, 24 struct armada_gem_object *obj) 25 { 26 struct armada_framebuffer *dfb; 27 uint8_t format, config; 28 int ret; 29 30 switch (mode->pixel_format) { 31 #define FMT(drm, fmt, mod) \ 32 case DRM_FORMAT_##drm: \ 33 format = CFG_##fmt; \ 34 config = mod; \ 35 break 36 FMT(RGB565, 565, CFG_SWAPRB); 37 FMT(BGR565, 565, 0); 38 FMT(ARGB1555, 1555, CFG_SWAPRB); 39 FMT(ABGR1555, 1555, 0); 40 FMT(RGB888, 888PACK, CFG_SWAPRB); 41 FMT(BGR888, 888PACK, 0); 42 FMT(XRGB8888, X888, CFG_SWAPRB); 43 FMT(XBGR8888, X888, 0); 44 FMT(ARGB8888, 8888, CFG_SWAPRB); 45 FMT(ABGR8888, 8888, 0); 46 FMT(YUYV, 422PACK, CFG_YUV2RGB | CFG_SWAPYU | CFG_SWAPUV); 47 FMT(UYVY, 422PACK, CFG_YUV2RGB); 48 FMT(VYUY, 422PACK, CFG_YUV2RGB | CFG_SWAPUV); 49 FMT(YVYU, 422PACK, CFG_YUV2RGB | CFG_SWAPYU); 50 FMT(YUV422, 422, CFG_YUV2RGB); 51 FMT(YVU422, 422, CFG_YUV2RGB | CFG_SWAPUV); 52 FMT(YUV420, 420, CFG_YUV2RGB); 53 FMT(YVU420, 420, CFG_YUV2RGB | CFG_SWAPUV); 54 FMT(C8, PSEUDO8, 0); 55 #undef FMT 56 default: 57 return ERR_PTR(-EINVAL); 58 } 59 60 dfb = kzalloc(sizeof(*dfb), GFP_KERNEL); 61 if (!dfb) { 62 DRM_ERROR("failed to allocate Armada fb object\n"); 63 return ERR_PTR(-ENOMEM); 64 } 65 66 dfb->fmt = format; 67 dfb->mod = config; 68 dfb->fb.obj[0] = &obj->obj; 69 70 drm_helper_mode_fill_fb_struct(dev, &dfb->fb, info, mode); 71 72 ret = drm_framebuffer_init(dev, &dfb->fb, &armada_fb_funcs); 73 if (ret) { 74 kfree(dfb); 75 return ERR_PTR(ret); 76 } 77 78 /* 79 * Take a reference on our object as we're successful - the 80 * caller already holds a reference, which keeps us safe for 81 * the above call, but the caller will drop their reference 82 * to it. Hence we need to take our own reference. 83 */ 84 drm_gem_object_get(&obj->obj); 85 86 return dfb; 87 } 88 89 struct drm_framebuffer *armada_fb_create(struct drm_device *dev, 90 struct drm_file *dfile, const struct drm_format_info *info, 91 const struct drm_mode_fb_cmd2 *mode) 92 { 93 struct armada_gem_object *obj; 94 struct armada_framebuffer *dfb; 95 int ret; 96 97 DRM_DEBUG_DRIVER("w%u h%u pf%08x f%u p%u,%u,%u\n", 98 mode->width, mode->height, mode->pixel_format, 99 mode->flags, mode->pitches[0], mode->pitches[1], 100 mode->pitches[2]); 101 102 /* We can only handle a single plane at the moment */ 103 if (info->num_planes > 1 && 104 (mode->handles[0] != mode->handles[1] || 105 mode->handles[0] != mode->handles[2])) { 106 ret = -EINVAL; 107 goto err; 108 } 109 110 obj = armada_gem_object_lookup(dfile, mode->handles[0]); 111 if (!obj) { 112 ret = -ENOENT; 113 goto err; 114 } 115 116 if (obj->obj.import_attach && !obj->sgt) { 117 ret = armada_gem_map_import(obj); 118 if (ret) 119 goto err_unref; 120 } 121 122 /* Framebuffer objects must have a valid device address for scanout */ 123 if (!obj->mapped) { 124 ret = -EINVAL; 125 goto err_unref; 126 } 127 128 dfb = armada_framebuffer_create(dev, info, mode, obj); 129 if (IS_ERR(dfb)) { 130 ret = PTR_ERR(dfb); 131 goto err; 132 } 133 134 drm_gem_object_put(&obj->obj); 135 136 return &dfb->fb; 137 138 err_unref: 139 drm_gem_object_put(&obj->obj); 140 err: 141 DRM_ERROR("failed to initialize framebuffer: %d\n", ret); 142 return ERR_PTR(ret); 143 } 144