1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2012 Russell King
6 #include <drm/drm_modeset_helper.h>
7 #include <drm/drm_fb_helper.h>
8 #include <drm/drm_fourcc.h>
9 #include <drm/drm_gem_framebuffer_helper.h>
11 #include "armada_drm.h"
12 #include "armada_fb.h"
13 #include "armada_gem.h"
14 #include "armada_hw.h"
16 static const struct drm_framebuffer_funcs armada_fb_funcs
= {
17 .destroy
= drm_gem_fb_destroy
,
18 .create_handle
= drm_gem_fb_create_handle
,
21 struct armada_framebuffer
*armada_framebuffer_create(struct drm_device
*dev
,
22 const struct drm_mode_fb_cmd2
*mode
, struct armada_gem_object
*obj
)
24 struct armada_framebuffer
*dfb
;
25 uint8_t format
, config
;
28 switch (mode
->pixel_format
) {
29 #define FMT(drm, fmt, mod) \
30 case DRM_FORMAT_##drm: \
34 FMT(RGB565
, 565, CFG_SWAPRB
);
36 FMT(ARGB1555
, 1555, CFG_SWAPRB
);
37 FMT(ABGR1555
, 1555, 0);
38 FMT(RGB888
, 888PACK
, CFG_SWAPRB
);
39 FMT(BGR888
, 888PACK
, 0);
40 FMT(XRGB8888
, X888
, CFG_SWAPRB
);
41 FMT(XBGR8888
, X888
, 0);
42 FMT(ARGB8888
, 8888, CFG_SWAPRB
);
43 FMT(ABGR8888
, 8888, 0);
44 FMT(YUYV
, 422PACK
, CFG_YUV2RGB
| CFG_SWAPYU
| CFG_SWAPUV
);
45 FMT(UYVY
, 422PACK
, CFG_YUV2RGB
);
46 FMT(VYUY
, 422PACK
, CFG_YUV2RGB
| CFG_SWAPUV
);
47 FMT(YVYU
, 422PACK
, CFG_YUV2RGB
| CFG_SWAPYU
);
48 FMT(YUV422
, 422, CFG_YUV2RGB
);
49 FMT(YVU422
, 422, CFG_YUV2RGB
| CFG_SWAPUV
);
50 FMT(YUV420
, 420, CFG_YUV2RGB
);
51 FMT(YVU420
, 420, CFG_YUV2RGB
| CFG_SWAPUV
);
55 return ERR_PTR(-EINVAL
);
58 dfb
= kzalloc(sizeof(*dfb
), GFP_KERNEL
);
60 DRM_ERROR("failed to allocate Armada fb object\n");
61 return ERR_PTR(-ENOMEM
);
66 dfb
->fb
.obj
[0] = &obj
->obj
;
68 drm_helper_mode_fill_fb_struct(dev
, &dfb
->fb
, mode
);
70 ret
= drm_framebuffer_init(dev
, &dfb
->fb
, &armada_fb_funcs
);
77 * Take a reference on our object as we're successful - the
78 * caller already holds a reference, which keeps us safe for
79 * the above call, but the caller will drop their reference
80 * to it. Hence we need to take our own reference.
82 drm_gem_object_get(&obj
->obj
);
87 struct drm_framebuffer
*armada_fb_create(struct drm_device
*dev
,
88 struct drm_file
*dfile
, const struct drm_mode_fb_cmd2
*mode
)
90 const struct drm_format_info
*info
= drm_get_format_info(dev
, mode
);
91 struct armada_gem_object
*obj
;
92 struct armada_framebuffer
*dfb
;
95 DRM_DEBUG_DRIVER("w%u h%u pf%08x f%u p%u,%u,%u\n",
96 mode
->width
, mode
->height
, mode
->pixel_format
,
97 mode
->flags
, mode
->pitches
[0], mode
->pitches
[1],
100 /* We can only handle a single plane at the moment */
101 if (info
->num_planes
> 1 &&
102 (mode
->handles
[0] != mode
->handles
[1] ||
103 mode
->handles
[0] != mode
->handles
[2])) {
108 obj
= armada_gem_object_lookup(dfile
, mode
->handles
[0]);
114 if (obj
->obj
.import_attach
&& !obj
->sgt
) {
115 ret
= armada_gem_map_import(obj
);
120 /* Framebuffer objects must have a valid device address for scanout */
126 dfb
= armada_framebuffer_create(dev
, mode
, obj
);
132 drm_gem_object_put(&obj
->obj
);
137 drm_gem_object_put(&obj
->obj
);
139 DRM_ERROR("failed to initialize framebuffer: %d\n", ret
);