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(drm_dev, 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(drm_dev);
65
66	drm_kms_helper_poll_init(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(drm_dev);
76}
77