tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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_fb_helper.h>
14#include <drm/drm_gem_dma_helper.h>
15#include <drm/drm_gem_framebuffer_helper.h>
16#include <drm/drm_mode_config.h>
17#include <drm/drm_panel.h>
18#include <drm/drm_print.h>
19#include <drm/drm_probe_helper.h>
20#include <drm/drm_vblank.h>
21
22#include "logicvc_drm.h"
23#include "logicvc_interface.h"
24#include "logicvc_layer.h"
25#include "logicvc_mode.h"
26
27static const struct drm_mode_config_funcs logicvc_mode_config_funcs = {
28 .fb_create = drm_gem_fb_create,
29 .output_poll_changed = drm_fb_helper_output_poll_changed,
30 .atomic_check = drm_atomic_helper_check,
31 .atomic_commit = drm_atomic_helper_commit,
32};
33
34int logicvc_mode_init(struct logicvc_drm *logicvc)
35{
36 struct drm_device *drm_dev = &logicvc->drm_dev;
37 struct drm_mode_config *mode_config = &drm_dev->mode_config;
38 struct logicvc_layer *layer_primary;
39 uint32_t preferred_depth;
40 int ret;
41
42 ret = drm_vblank_init(drm_dev, mode_config->num_crtc);
43 if (ret) {
44 drm_err(drm_dev, "Failed to initialize vblank\n");
45 return ret;
46 }
47
48 layer_primary = logicvc_layer_get_primary(logicvc);
49 if (!layer_primary) {
50 drm_err(drm_dev, "Failed to get primary layer\n");
51 return -EINVAL;
52 }
53
54 preferred_depth = layer_primary->formats->depth;
55
56 /* DRM counts alpha in depth, our driver doesn't. */
57 if (layer_primary->formats->alpha)
58 preferred_depth += 8;
59
60 mode_config->min_width = 64;
61 mode_config->max_width = 2048;
62 mode_config->min_height = 1;
63 mode_config->max_height = 2048;
64 mode_config->preferred_depth = preferred_depth;
65 mode_config->funcs = &logicvc_mode_config_funcs;
66
67 drm_mode_config_reset(drm_dev);
68
69 drm_kms_helper_poll_init(drm_dev);
70
71 return 0;
72}
73
74void logicvc_mode_fini(struct logicvc_drm *logicvc)
75{
76 struct drm_device *drm_dev = &logicvc->drm_dev;
77
78 drm_kms_helper_poll_fini(drm_dev);
79}