LXR linux/include/drm/drm_crtc

   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/spinlock.h>
  37#include <linux/types.h>
  38#include <linux/idr.h>
  39
  40#include <linux/fb.h>
  41
  42struct drm_crtc_helper_funcs {
  43        /*
  44         * Control power levels on the CRTC.  If the mode passed in is
  45         * unsupported, the provider must use the next lowest power level.
  46         */
  47        void (*dpms)(struct drm_crtc *crtc, int mode);
  48        void (*prepare)(struct drm_crtc *crtc);
  49        void (*commit)(struct drm_crtc *crtc);
  50
  51        /* Provider can fixup or change mode timings before modeset occurs */
  52        bool (*mode_fixup)(struct drm_crtc *crtc,
  53                           struct drm_display_mode *mode,
  54                           struct drm_display_mode *adjusted_mode);
  55        /* Actually set the mode */
  56        int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
  57                        struct drm_display_mode *adjusted_mode, int x, int y,
  58                        struct drm_framebuffer *old_fb);
  59
  60        /* Move the crtc on the current fb to the given position *optional* */
  61        int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
  62                             struct drm_framebuffer *old_fb);
  63};
  64
  65struct drm_encoder_helper_funcs {
  66        void (*dpms)(struct drm_encoder *encoder, int mode);
  67        void (*save)(struct drm_encoder *encoder);
  68        void (*restore)(struct drm_encoder *encoder);
  69
  70        bool (*mode_fixup)(struct drm_encoder *encoder,
  71                           struct drm_display_mode *mode,
  72                           struct drm_display_mode *adjusted_mode);
  73        void (*prepare)(struct drm_encoder *encoder);
  74        void (*commit)(struct drm_encoder *encoder);
  75        void (*mode_set)(struct drm_encoder *encoder,
  76                         struct drm_display_mode *mode,
  77                         struct drm_display_mode *adjusted_mode);
  78        struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
  79        /* detect for DAC style encoders */
  80        enum drm_connector_status (*detect)(struct drm_encoder *encoder,
  81                                            struct drm_connector *connector);
  82};
  83
  84struct drm_connector_helper_funcs {
  85        int (*get_modes)(struct drm_connector *connector);
  86        int (*mode_valid)(struct drm_connector *connector,
  87                          struct drm_display_mode *mode);
  88        struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
  89};
  90
  91extern int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY);
  92extern void drm_helper_disable_unused_functions(struct drm_device *dev);
  93extern int drm_helper_hotplug_stage_two(struct drm_device *dev);
  94extern bool drm_helper_initial_config(struct drm_device *dev);
  95extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
  96extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
  97                                     struct drm_display_mode *mode,
  98                                     int x, int y,
  99                                     struct drm_framebuffer *old_fb);
 100extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
 101
 102extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
 103
 104extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
 105                                          struct drm_mode_fb_cmd *mode_cmd);
 106
 107static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
 108                                       const struct drm_crtc_helper_funcs *funcs)
 109{
 110        crtc->helper_private = (void *)funcs;
 111}
 112
 113static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
 114                                          const struct drm_encoder_helper_funcs *funcs)
 115{
 116        encoder->helper_private = (void *)funcs;
 117}
 118
 119static inline void drm_connector_helper_add(struct drm_connector *connector,
 120                                            const struct drm_connector_helper_funcs *funcs)
 121{
 122        connector->helper_private = (void *)funcs;
 123}
 124
 125extern int drm_helper_resume_force_mode(struct drm_device *dev);
 126#endif
 127