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