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