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authorThierry Reding <treding@nvidia.com>2013-08-30 07:36:43 -0400
committerThierry Reding <treding@nvidia.com>2013-12-17 12:09:46 -0500
commitaead40ea0b53a0e28d34adf7bb923ecb2968c04a (patch)
tree3d46c7716c1ef3acdc76d60c309a7394dccf02c4 /include/drm
parent068a00233969833f1ba925e7627797489efd6041 (diff)
drm: Add panel support
Add a very simple framework to register and lookup panels. Panel drivers can initialize a DRM panel and register it with the framework, allowing them to be retrieved and used by display drivers. Currently only support for DPMS and obtaining panel modes is provided. However it should be sufficient to enable a large number of panels. The framework should also be easily extensible to support more sophisticated kinds of panels such as DSI. The framework hasn't been tied into the DRM core, even though it should be easily possible to do so if that's what we want. In the current implementation, display drivers can simple make use of it to retrieve a panel, obtain its modes and control its DPMS mode. Note that this is currently only tested on systems that boot from a device tree. No glue code has been written yet for systems that use platform data, but it should be easy to add. Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drm_panel.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
new file mode 100644
index 000000000000..c2ab77add67c
--- /dev/null
+++ b/include/drm/drm_panel.h
@@ -0,0 +1,82 @@
1/*
2 * Copyright (C) 2013, NVIDIA Corporation. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24#ifndef __DRM_PANEL_H__
25#define __DRM_PANEL_H__
26
27#include <linux/list.h>
28
29struct drm_connector;
30struct drm_device;
31struct drm_panel;
32
33struct drm_panel_funcs {
34 int (*disable)(struct drm_panel *panel);
35 int (*enable)(struct drm_panel *panel);
36 int (*get_modes)(struct drm_panel *panel);
37};
38
39struct drm_panel {
40 struct drm_device *drm;
41 struct drm_connector *connector;
42 struct device *dev;
43
44 const struct drm_panel_funcs *funcs;
45
46 struct list_head list;
47};
48
49static inline int drm_panel_disable(struct drm_panel *panel)
50{
51 if (panel && panel->funcs && panel->funcs->disable)
52 return panel->funcs->disable(panel);
53
54 return panel ? -ENOSYS : -EINVAL;
55}
56
57static inline int drm_panel_enable(struct drm_panel *panel)
58{
59 if (panel && panel->funcs && panel->funcs->enable)
60 return panel->funcs->enable(panel);
61
62 return panel ? -ENOSYS : -EINVAL;
63}
64
65void drm_panel_init(struct drm_panel *panel);
66
67int drm_panel_add(struct drm_panel *panel);
68void drm_panel_remove(struct drm_panel *panel);
69
70int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector);
71int drm_panel_detach(struct drm_panel *panel);
72
73#ifdef CONFIG_OF
74struct drm_panel *of_drm_find_panel(struct device_node *np);
75#else
76static inline struct drm_panel *of_drm_find_panel(struct device_node *np)
77{
78 return NULL;
79}
80#endif
81
82#endif