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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. /**
  48.  * drm_crtc_helper_funcs - helper operations for CRTCs
  49.  * @mode_fixup: try to fixup proposed mode for this connector
  50.  * @mode_set: set this mode
  51.  *
  52.  * The helper operations are called by the mid-layer CRTC helper.
  53.  */
  54. struct drm_crtc_helper_funcs {
  55.         /*
  56.          * Control power levels on the CRTC.  If the mode passed in is
  57.          * unsupported, the provider must use the next lowest power level.
  58.          */
  59.         void (*dpms)(struct drm_crtc *crtc, int mode);
  60.         void (*prepare)(struct drm_crtc *crtc);
  61.         void (*commit)(struct drm_crtc *crtc);
  62.  
  63.         /* Provider can fixup or change mode timings before modeset occurs */
  64.         bool (*mode_fixup)(struct drm_crtc *crtc,
  65.                            const struct drm_display_mode *mode,
  66.                            struct drm_display_mode *adjusted_mode);
  67.         /* Actually set the mode */
  68.         int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
  69.                         struct drm_display_mode *adjusted_mode, int x, int y,
  70.                         struct drm_framebuffer *old_fb);
  71.         void (*mode_set_nofb)(struct drm_crtc *crtc);
  72.  
  73.         /* Move the crtc on the current fb to the given position *optional* */
  74.         int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
  75.                              struct drm_framebuffer *old_fb);
  76.         int (*mode_set_base_atomic)(struct drm_crtc *crtc,
  77.                                     struct drm_framebuffer *fb, int x, int y,
  78.                                     enum mode_set_atomic);
  79.  
  80.         /* reload the current crtc LUT */
  81.         void (*load_lut)(struct drm_crtc *crtc);
  82.  
  83.         /* disable crtc when not in use - more explicit than dpms off */
  84.         void (*disable)(struct drm_crtc *crtc);
  85.  
  86.         /* atomic helpers */
  87.         int (*atomic_check)(struct drm_crtc *crtc,
  88.                             struct drm_crtc_state *state);
  89.         void (*atomic_begin)(struct drm_crtc *crtc);
  90.         void (*atomic_flush)(struct drm_crtc *crtc);
  91. };
  92.  
  93. /**
  94.  * drm_encoder_helper_funcs - helper operations for encoders
  95.  * @mode_fixup: try to fixup proposed mode for this connector
  96.  * @mode_set: set this mode
  97.  *
  98.  * The helper operations are called by the mid-layer CRTC helper.
  99.  */
  100. struct drm_encoder_helper_funcs {
  101.         void (*dpms)(struct drm_encoder *encoder, int mode);
  102.         void (*save)(struct drm_encoder *encoder);
  103.         void (*restore)(struct drm_encoder *encoder);
  104.  
  105.         bool (*mode_fixup)(struct drm_encoder *encoder,
  106.                            const struct drm_display_mode *mode,
  107.                            struct drm_display_mode *adjusted_mode);
  108.         void (*prepare)(struct drm_encoder *encoder);
  109.         void (*commit)(struct drm_encoder *encoder);
  110.         void (*mode_set)(struct drm_encoder *encoder,
  111.                          struct drm_display_mode *mode,
  112.                          struct drm_display_mode *adjusted_mode);
  113.         struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
  114.         /* detect for DAC style encoders */
  115.         enum drm_connector_status (*detect)(struct drm_encoder *encoder,
  116.                                             struct drm_connector *connector);
  117.         /* disable encoder when not in use - more explicit than dpms off */
  118.         void (*disable)(struct drm_encoder *encoder);
  119. };
  120.  
  121. /**
  122.  * drm_connector_helper_funcs - helper operations for connectors
  123.  * @get_modes: get mode list for this connector
  124.  * @mode_valid (optional): is this mode valid on the given connector?
  125.  *
  126.  * The helper operations are called by the mid-layer CRTC helper.
  127.  */
  128. struct drm_connector_helper_funcs {
  129.         int (*get_modes)(struct drm_connector *connector);
  130.         enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
  131.                           struct drm_display_mode *mode);
  132.         struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
  133. };
  134.  
  135. extern void drm_helper_disable_unused_functions(struct drm_device *dev);
  136. extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
  137. extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
  138.                                      struct drm_display_mode *mode,
  139.                                      int x, int y,
  140.                                      struct drm_framebuffer *old_fb);
  141. extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
  142. extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
  143.  
  144. extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
  145.  
  146. extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);
  147.  
  148. extern void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
  149.                                           struct drm_mode_fb_cmd2 *mode_cmd);
  150.  
  151. static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
  152.                                        const struct drm_crtc_helper_funcs *funcs)
  153. {
  154.         crtc->helper_private = (void *)funcs;
  155. }
  156.  
  157. static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
  158.                                           const struct drm_encoder_helper_funcs *funcs)
  159. {
  160.         encoder->helper_private = (void *)funcs;
  161. }
  162.  
  163. static inline void drm_connector_helper_add(struct drm_connector *connector,
  164.                                             const struct drm_connector_helper_funcs *funcs)
  165. {
  166.         connector->helper_private = (void *)funcs;
  167. }
  168.  
  169. extern void drm_helper_resume_force_mode(struct drm_device *dev);
  170.  
  171. int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
  172.                              struct drm_display_mode *adjusted_mode, int x, int y,
  173.                              struct drm_framebuffer *old_fb);
  174. int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
  175.                                   struct drm_framebuffer *old_fb);
  176.  
  177. /* drm_probe_helper.c */
  178. extern int drm_helper_probe_single_connector_modes(struct drm_connector
  179.                                                    *connector, uint32_t maxX,
  180.                                                    uint32_t maxY);
  181. extern int drm_helper_probe_single_connector_modes_nomerge(struct drm_connector
  182.                                                            *connector,
  183.                                                            uint32_t maxX,
  184.                                                            uint32_t maxY);
  185. extern void drm_kms_helper_poll_init(struct drm_device *dev);
  186. extern void drm_kms_helper_poll_fini(struct drm_device *dev);
  187. extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
  188. extern void drm_kms_helper_hotplug_event(struct drm_device *dev);
  189.  
  190. extern void drm_kms_helper_poll_disable(struct drm_device *dev);
  191. extern void drm_kms_helper_poll_enable(struct drm_device *dev);
  192.  
  193. #endif
  194.