include/drm/drm_crtc_helper.h

   1 /*
   2  * Copyright © 2006 Keith Packard
   3  * Copyright © 2007-2008 Dave Airlie
   4  * Copyright © 2007-2008 Intel Corporation
   5  *   Jesse Barnes <jesse.barnes@intel.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /*
  27  * The DRM mode setting helper functions are common code for drivers to use if
  28  * they wish.  Drivers are not forced to use this code in their
  29  * implementations but it would be useful if they code they do use at least
  30  * provides a consistent interface and operation to userspace
  31  */
  32
  33 #ifndef __DRM_CRTC_HELPER_H__
  34 #define __DRM_CRTC_HELPER_H__
  35
  36 #include <linux/i2c.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/types.h>
  39 #include <linux/idr.h>
  40
  41 #include <linux/fb.h>
  42
  43 struct drm_crtc_helper_funcs {
  44         /*
  45          * Control power levels on the CRTC.  If the mode passed in is
  46          * unsupported, the provider must use the next lowest power level.
  47          */
  48         void (*dpms)(struct drm_crtc *crtc, int mode);
  49         void (*prepare)(struct drm_crtc *crtc);
  50         void (*commit)(struct drm_crtc *crtc);
  51
  52         /* Provider can fixup or change mode timings before modeset occurs */
  53         bool (*mode_fixup)(struct drm_crtc *crtc,
  54                            struct drm_display_mode *mode,
  55                            struct drm_display_mode *adjusted_mode);
  56         /* Actually set the mode */
  57         int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
  58                         struct drm_display_mode *adjusted_mode, int x, int y,
  59                         struct drm_framebuffer *old_fb);
  60
  61         /* Move the crtc on the current fb to the given position *optional* */
  62         int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
  63                              struct drm_framebuffer *old_fb);
  64 };
  65
  66 struct drm_encoder_helper_funcs {
  67         void (*dpms)(struct drm_encoder *encoder, int mode);
  68         void (*save)(struct drm_encoder *encoder);
  69         void (*restore)(struct drm_encoder *encoder);
  70
  71         bool (*mode_fixup)(struct drm_encoder *encoder,
  72                            struct drm_display_mode *mode,
  73                            struct drm_display_mode *adjusted_mode);
  74         void (*prepare)(struct drm_encoder *encoder);
  75         void (*commit)(struct drm_encoder *encoder);
  76         void (*mode_set)(struct drm_encoder *encoder,
  77                          struct drm_display_mode *mode,
  78                          struct drm_display_mode *adjusted_mode);
  79         struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
  80         /* detect for DAC style encoders */
  81         enum drm_connector_status (*detect)(struct drm_encoder *encoder,
  82                                             struct drm_connector *connector);
  83 };
  84
  85 struct drm_connector_helper_funcs {
  86         int (*get_modes)(struct drm_connector *connector);
  87         int (*mode_valid)(struct drm_connector *connector,
  88                           struct drm_display_mode *mode);
  89         struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
  90 };
  91
  92 extern int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY);
  93 extern void drm_helper_disable_unused_functions(struct drm_device *dev);
  94 extern int drm_helper_hotplug_stage_two(struct drm_device *dev);
  95 extern bool drm_helper_initial_config(struct drm_device *dev, bool can_grow);
  96 extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
  97 extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
  98                                      struct drm_display_mode *mode,
  99                                      int x, int y,
 100                                      struct drm_framebuffer *old_fb);
 101 extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
 102
 103 extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
 104                                           struct drm_mode_fb_cmd *mode_cmd);
 105
 106 static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
 107                                        const struct drm_crtc_helper_funcs *funcs)
 108 {
 109         crtc->helper_private = (void *)funcs;
 110 }
 111
 112 static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
 113                                           const struct drm_encoder_helper_funcs *funcs)
 114 {
 115         encoder->helper_private = (void *)funcs;
 116 }
 117
 118 static inline void drm_connector_helper_add(struct drm_connector *connector,
 119                                             const struct drm_connector_helper_funcs *funcs)
 120 {
 121         connector->helper_private = (void *)funcs;
 122 }
 123
 124 extern int drm_helper_resume_force_mode(struct drm_device *dev);
 125 #endif