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_mode_fb_cmd2 *mode, struct armada_gem_object *obj) 22 { 23 struct armada_framebuffer *dfb; 24 uint8_t format, config; 25 int ret; 26 27 switch (mode->pixel_format) { 28 #define FMT(drm, fmt, mod) \ 29 case DRM_FORMAT_##drm: \ 30 format = CFG_##fmt; \ 31 config = mod; \ 32 break 33 FMT(RGB565, 565, CFG_SWAPRB); 34 FMT(BGR565, 565, 0); 35 FMT(ARGB1555, 1555, CFG_SWAPRB); 36 FMT(ABGR1555, 1555, 0); 37 FMT(RGB888, 888PACK, CFG_SWAPRB); 38 FMT(BGR888, 888PACK, 0); 39 FMT(XRGB8888, X888, CFG_SWAPRB); 40 FMT(XBGR8888, X888, 0); 41 FMT(ARGB8888, 8888, CFG_SWAPRB); 42 FMT(ABGR8888, 8888, 0); 43 FMT(YUYV, 422PACK, CFG_YUV2RGB | CFG_SWAPYU | CFG_SWAPUV); 44 FMT(UYVY, 422PACK, CFG_YUV2RGB); 45 FMT(VYUY, 422PACK, CFG_YUV2RGB | CFG_SWAPUV); 46 FMT(YVYU, 422PACK, CFG_YUV2RGB | CFG_SWAPYU); 47 FMT(YUV422, 422, CFG_YUV2RGB); 48 FMT(YVU422, 422, CFG_YUV2RGB | CFG_SWAPUV); 49 FMT(YUV420, 420, CFG_YUV2RGB); 50 FMT(YVU420, 420, CFG_YUV2RGB | CFG_SWAPUV); 51 FMT(C8, PSEUDO8, 0); 52 #undef FMT 53 default: 54 return ERR_PTR(-EINVAL); 55 } 56 57 dfb = kzalloc(sizeof(*dfb), GFP_KERNEL); 58 if (!dfb) { 59 DRM_ERROR("failed to allocate Armada fb object\n"); 60 return ERR_PTR(-ENOMEM); 61 } 62 63 dfb->fmt = format; 64 dfb->mod = config; 65 dfb->fb.obj[0] = &obj->obj; 66 67 drm_helper_mode_fill_fb_struct(dev, &dfb->fb, mode); 68 69 ret = drm_framebuffer_init(dev, &dfb->fb, &armada_fb_funcs); 70 if (ret) { 71 kfree(dfb); 72 return ERR_PTR(ret); 73 } 74 75 /* 76 * Take a reference on our object as we're successful - the 77 * caller already holds a reference, which keeps us safe for 78 * the above call, but the caller will drop their reference 79 * to it. Hence we need to take our own reference. 80 */ 81 drm_gem_object_get(&obj->obj); 82 83 return dfb; 84 } 85 86 struct drm_framebuffer *armada_fb_create(struct drm_device *dev, 87 struct drm_file *dfile, const struct drm_mode_fb_cmd2 *mode) 88 { 89 const struct drm_format_info *info = drm_get_format_info(dev, mode); 90 struct armada_gem_object *obj; 91 struct armada_framebuffer *dfb; 92 int ret; 93 94 DRM_DEBUG_DRIVER("w%u h%u pf%08x f%u p%u,%u,%u\n", 95 mode->width, mode->height, mode->pixel_format, 96 mode->flags, mode->pitches[0], mode->pitches[1], 97 mode->pitches[2]); 98 99 /* We can only handle a single plane at the moment */ 100 if (info->num_planes > 1 && 101 (mode->handles[0] != mode->handles[1] || 102 mode->handles[0] != mode->handles[2])) { 103 ret = -EINVAL; 104 goto err; 105 } 106 107 obj = armada_gem_object_lookup(dfile, mode->handles[0]); 108 if (!obj) { 109 ret = -ENOENT; 110 goto err; 111 } 112 113 if (obj->obj.import_attach && !obj->sgt) { 114 ret = armada_gem_map_import(obj); 115 if (ret) 116 goto err_unref; 117 } 118 119 /* Framebuffer objects must have a valid device address for scanout */ 120 if (!obj->mapped) { 121 ret = -EINVAL; 122 goto err_unref; 123 } 124 125 dfb = armada_framebuffer_create(dev, mode, obj); 126 if (IS_ERR(dfb)) { 127 ret = PTR_ERR(dfb); 128 goto err; 129 } 130 131 drm_gem_object_put(&obj->obj); 132 133 return &dfb->fb; 134 135 err_unref: 136 drm_gem_object_put(&obj->obj); 137 err: 138 DRM_ERROR("failed to initialize framebuffer: %d\n", ret); 139 return ERR_PTR(ret); 140 } 141