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  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.  
  42. enum mode_set_atomic {
  43.         LEAVE_ATOMIC_MODE_SET,
  44.         ENTER_ATOMIC_MODE_SET,
  45. };
  46.  
  47. struct drm_crtc_helper_funcs {
  48.         /*
  49.          * Control power levels on the CRTC.  If the mode passed in is
  50.          * unsupported, the provider must use the next lowest power level.
  51.          */
  52.         void (*dpms)(struct drm_crtc *crtc, int mode);
  53.         void (*prepare)(struct drm_crtc *crtc);
  54.         void (*commit)(struct drm_crtc *crtc);
  55.  
  56.         /* Provider can fixup or change mode timings before modeset occurs */
  57.         bool (*mode_fixup)(struct drm_crtc *crtc,
  58.                            struct drm_display_mode *mode,
  59.                            struct drm_display_mode *adjusted_mode);
  60.         /* Actually set the mode */
  61.         int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
  62.                         struct drm_display_mode *adjusted_mode, int x, int y,
  63.                         struct drm_framebuffer *old_fb);
  64.  
  65.         /* Move the crtc on the current fb to the given position *optional* */
  66.         int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
  67.                              struct drm_framebuffer *old_fb);
  68.         int (*mode_set_base_atomic)(struct drm_crtc *crtc,
  69.                                     struct drm_framebuffer *fb, int x, int y,
  70.                                     enum mode_set_atomic);
  71.  
  72.         /* reload the current crtc LUT */
  73.         void (*load_lut)(struct drm_crtc *crtc);
  74.  
  75.         /* disable crtc when not in use - more explicit than dpms off */
  76.         void (*disable)(struct drm_crtc *crtc);
  77. };
  78.  
  79. struct drm_encoder_helper_funcs {
  80.         void (*dpms)(struct drm_encoder *encoder, int mode);
  81.         void (*save)(struct drm_encoder *encoder);
  82.         void (*restore)(struct drm_encoder *encoder);
  83.  
  84.         bool (*mode_fixup)(struct drm_encoder *encoder,
  85.                            struct drm_display_mode *mode,
  86.                            struct drm_display_mode *adjusted_mode);
  87.         void (*prepare)(struct drm_encoder *encoder);
  88.         void (*commit)(struct drm_encoder *encoder);
  89.         void (*mode_set)(struct drm_encoder *encoder,
  90.                          struct drm_display_mode *mode,
  91.                          struct drm_display_mode *adjusted_mode);
  92.         struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
  93.         /* detect for DAC style encoders */
  94.         enum drm_connector_status (*detect)(struct drm_encoder *encoder,
  95.                                             struct drm_connector *connector);
  96.         /* disable encoder when not in use - more explicit than dpms off */
  97.         void (*disable)(struct drm_encoder *encoder);
  98. };
  99.  
  100. struct drm_connector_helper_funcs {
  101.         int (*get_modes)(struct drm_connector *connector);
  102.         int (*mode_valid)(struct drm_connector *connector,
  103.                           struct drm_display_mode *mode);
  104.         struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
  105. };
  106.  
  107. extern int drm_helper_probe_single_connector_modes(struct drm_connector *connector, uint32_t maxX, uint32_t maxY);
  108. extern void drm_helper_disable_unused_functions(struct drm_device *dev);
  109. extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
  110. extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
  111.                                      struct drm_display_mode *mode,
  112.                                      int x, int y,
  113.                                      struct drm_framebuffer *old_fb);
  114. extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
  115. extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
  116.  
  117. extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
  118.  
  119. extern int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
  120.                                           struct drm_mode_fb_cmd2 *mode_cmd);
  121.  
  122. static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
  123.                                        const struct drm_crtc_helper_funcs *funcs)
  124. {
  125.         crtc->helper_private = (void *)funcs;
  126. }
  127.  
  128. static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
  129.                                           const struct drm_encoder_helper_funcs *funcs)
  130. {
  131.         encoder->helper_private = (void *)funcs;
  132. }
  133.  
  134. static inline void drm_connector_helper_add(struct drm_connector *connector,
  135.                                             const struct drm_connector_helper_funcs *funcs)
  136. {
  137.         connector->helper_private = (void *)funcs;
  138. }
  139.  
  140. extern int drm_helper_resume_force_mode(struct drm_device *dev);
  141. extern void drm_kms_helper_poll_init(struct drm_device *dev);
  142. extern void drm_kms_helper_poll_fini(struct drm_device *dev);
  143. extern void drm_helper_hpd_irq_event(struct drm_device *dev);
  144.  
  145. extern void drm_kms_helper_poll_disable(struct drm_device *dev);
  146. extern void drm_kms_helper_poll_enable(struct drm_device *dev);
  147.  
  148. extern int drm_format_num_planes(uint32_t format);
  149.  
  150. #endif
  151.