tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * i.MX drm driver
3 *
4 * Copyright (C) 2012 Sascha Hauer, Pengutronix
5 *
6 * Based on Samsung Exynos code
7 *
8 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 */
20#include <linux/module.h>
21#include <drm/drmP.h>
22#include <drm/drm_crtc.h>
23#include <drm/drm_crtc_helper.h>
24#include <drm/drm_fb_cma_helper.h>
25
26#include "imx-drm.h"
27
28#define MAX_CONNECTOR 4
29#define PREFERRED_BPP 16
30
31static struct drm_fbdev_cma *fbdev_cma;
32
33static int legacyfb_depth = 16;
34
35module_param(legacyfb_depth, int, 0444);
36
37static int __init imx_fb_helper_init(void)
38{
39 struct drm_device *drm = imx_drm_device_get();
40
41 if (!drm)
42 return -EINVAL;
43
44 if (legacyfb_depth != 16 && legacyfb_depth != 32) {
45 pr_warn("i.MX legacyfb: invalid legacyfb_depth setting. defaulting to 16bpp\n");
46 legacyfb_depth = 16;
47 }
48
49 fbdev_cma = drm_fbdev_cma_init(drm, legacyfb_depth,
50 drm->mode_config.num_crtc, MAX_CONNECTOR);
51
52 if (IS_ERR(fbdev_cma)) {
53 imx_drm_device_put();
54 return PTR_ERR(fbdev_cma);
55 }
56
57 imx_drm_fb_helper_set(fbdev_cma);
58
59 return 0;
60}
61
62static void __exit imx_fb_helper_exit(void)
63{
64 imx_drm_fb_helper_set(NULL);
65 drm_fbdev_cma_fini(fbdev_cma);
66 imx_drm_device_put();
67}
68
69late_initcall(imx_fb_helper_init);
70module_exit(imx_fb_helper_exit);
71
72MODULE_DESCRIPTION("Freescale i.MX legacy fb driver");
73MODULE_AUTHOR("Sascha Hauer, Pengutronix");
74MODULE_LICENSE("GPL");