1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2019-2022 Bootlin
4 * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
5 */
6
7#include <linux/types.h>
8
9#include <drm/drm_atomic.h>
10#include <drm/drm_atomic_helper.h>
11#include <drm/drm_drv.h>
12#include <drm/drm_gem_dma_helper.h>
13#include <drm/drm_gem_framebuffer_helper.h>
14#include <drm/drm_mode_config.h>
15#include <drm/drm_panel.h>
16#include <drm/drm_print.h>
17#include <drm/drm_probe_helper.h>
18#include <drm/drm_vblank.h>
19
20#include "logicvc_drm.h"
21#include "logicvc_interface.h"
22#include "logicvc_layer.h"
23#include "logicvc_mode.h"
24
25static const struct drm_mode_config_funcs logicvc_mode_config_funcs = {
26 .fb_create = drm_gem_fb_create,
27 .atomic_check = drm_atomic_helper_check,
28 .atomic_commit = drm_atomic_helper_commit,
29};
30
31int logicvc_mode_init(struct logicvc_drm *logicvc)
32{
33 struct drm_device *drm_dev = &logicvc->drm_dev;
34 struct drm_mode_config *mode_config = &drm_dev->mode_config;
35 struct logicvc_layer *layer_primary;
36 uint32_t preferred_depth;
37 int ret;
38
39 ret = drm_vblank_init(dev: drm_dev, num_crtcs: mode_config->num_crtc);
40 if (ret) {
41 drm_err(drm_dev, "Failed to initialize vblank\n");
42 return ret;
43 }
44
45 layer_primary = logicvc_layer_get_primary(logicvc);
46 if (!layer_primary) {
47 drm_err(drm_dev, "Failed to get primary layer\n");
48 return -EINVAL;
49 }
50
51 preferred_depth = layer_primary->formats->depth;
52
53 /* DRM counts alpha in depth, our driver doesn't. */
54 if (layer_primary->formats->alpha)
55 preferred_depth += 8;
56
57 mode_config->min_width = 64;
58 mode_config->max_width = 2048;
59 mode_config->min_height = 1;
60 mode_config->max_height = 2048;
61 mode_config->preferred_depth = preferred_depth;
62 mode_config->funcs = &logicvc_mode_config_funcs;
63
64 drm_mode_config_reset(dev: drm_dev);
65
66 drm_kms_helper_poll_init(dev: drm_dev);
67
68 return 0;
69}
70
71void logicvc_mode_fini(struct logicvc_drm *logicvc)
72{
73 struct drm_device *drm_dev = &logicvc->drm_dev;
74
75 drm_kms_helper_poll_fini(dev: drm_dev);
76}
77

source code of linux/drivers/gpu/drm/logicvc/logicvc_mode.c