drivers/gpu/drm/exynos/exynos_drm_encoder.c

   1 /* exynos_drm_encoder.c
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Authors:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <drm/drmP.h>
  16 #include <drm/drm_crtc_helper.h>
  17
  18 #include "exynos_drm_drv.h"
  19 #include "exynos_drm_encoder.h"
  20
  21 #define to_exynos_encoder(x)    container_of(x, struct exynos_drm_encoder,\
  22                                 drm_encoder)
  23
  24 /*
  25  * exynos specific encoder structure.
  26  *
  27  * @drm_encoder: encoder object.
  28  * @display: the display structure that maps to this encoder
  29  */
  30 struct exynos_drm_encoder {
  31         struct drm_encoder              drm_encoder;
  32         struct exynos_drm_display       *display;
  33 };
  34
  35 static bool
  36 exynos_drm_encoder_mode_fixup(struct drm_encoder *encoder,
  37                                const struct drm_display_mode *mode,
  38                                struct drm_display_mode *adjusted_mode)
  39 {
  40         struct drm_device *dev = encoder->dev;
  41         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
  42         struct exynos_drm_display *display = exynos_encoder->display;
  43         struct drm_connector *connector;
  44
  45         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  46                 if (connector->encoder != encoder)
  47                         continue;
  48
  49                 if (display->ops->mode_fixup)
  50                         display->ops->mode_fixup(display, connector, mode,
  51                                         adjusted_mode);
  52         }
  53
  54         return true;
  55 }
  56
  57 static void exynos_drm_encoder_mode_set(struct drm_encoder *encoder,
  58                                          struct drm_display_mode *mode,
  59                                          struct drm_display_mode *adjusted_mode)
  60 {
  61         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
  62         struct exynos_drm_display *display = exynos_encoder->display;
  63
  64         if (display->ops->mode_set)
  65                 display->ops->mode_set(display, adjusted_mode);
  66 }
  67
  68 static void exynos_drm_encoder_enable(struct drm_encoder *encoder)
  69 {
  70         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
  71         struct exynos_drm_display *display = exynos_encoder->display;
  72
  73         if (display->ops->dpms)
  74                 display->ops->dpms(display, DRM_MODE_DPMS_ON);
  75
  76         if (display->ops->commit)
  77                 display->ops->commit(display);
  78 }
  79
  80 static void exynos_drm_encoder_disable(struct drm_encoder *encoder)
  81 {
  82         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
  83         struct exynos_drm_display *display = exynos_encoder->display;
  84
  85         if (display->ops->dpms)
  86                 display->ops->dpms(display, DRM_MODE_DPMS_OFF);
  87 }
  88
  89 static struct drm_encoder_helper_funcs exynos_encoder_helper_funcs = {
  90         .mode_fixup     = exynos_drm_encoder_mode_fixup,
  91         .mode_set       = exynos_drm_encoder_mode_set,
  92         .enable         = exynos_drm_encoder_enable,
  93         .disable        = exynos_drm_encoder_disable,
  94 };
  95
  96 static void exynos_drm_encoder_destroy(struct drm_encoder *encoder)
  97 {
  98         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
  99
 100         drm_encoder_cleanup(encoder);
 101         kfree(exynos_encoder);
 102 }
 103
 104 static struct drm_encoder_funcs exynos_encoder_funcs = {
 105         .destroy = exynos_drm_encoder_destroy,
 106 };
 107
 108 static unsigned int exynos_drm_encoder_clones(struct drm_encoder *encoder)
 109 {
 110         struct drm_encoder *clone;
 111         struct drm_device *dev = encoder->dev;
 112         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 113         struct exynos_drm_display *display = exynos_encoder->display;
 114         unsigned int clone_mask = 0;
 115         int cnt = 0;
 116
 117         list_for_each_entry(clone, &dev->mode_config.encoder_list, head) {
 118                 switch (display->type) {
 119                 case EXYNOS_DISPLAY_TYPE_LCD:
 120                 case EXYNOS_DISPLAY_TYPE_HDMI:
 121                 case EXYNOS_DISPLAY_TYPE_VIDI:
 122                         clone_mask |= (1 << (cnt++));
 123                         break;
 124                 default:
 125                         continue;
 126                 }
 127         }
 128
 129         return clone_mask;
 130 }
 131
 132 void exynos_drm_encoder_setup(struct drm_device *dev)
 133 {
 134         struct drm_encoder *encoder;
 135
 136         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
 137                 encoder->possible_clones = exynos_drm_encoder_clones(encoder);
 138 }
 139
 140 struct drm_encoder *
 141 exynos_drm_encoder_create(struct drm_device *dev,
 142                            struct exynos_drm_display *display,
 143                            unsigned long possible_crtcs)
 144 {
 145         struct drm_encoder *encoder;
 146         struct exynos_drm_encoder *exynos_encoder;
 147
 148         if (!possible_crtcs)
 149                 return NULL;
 150
 151         exynos_encoder = kzalloc(sizeof(*exynos_encoder), GFP_KERNEL);
 152         if (!exynos_encoder)
 153                 return NULL;
 154
 155         exynos_encoder->display = display;
 156         encoder = &exynos_encoder->drm_encoder;
 157         encoder->possible_crtcs = possible_crtcs;
 158
 159         DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
 160
 161         drm_encoder_init(dev, encoder, &exynos_encoder_funcs,
 162                         DRM_MODE_ENCODER_TMDS);
 163
 164         drm_encoder_helper_add(encoder, &exynos_encoder_helper_funcs);
 165
 166         DRM_DEBUG_KMS("encoder has been created\n");
 167
 168         return encoder;
 169 }
 170
 171 struct exynos_drm_display *exynos_drm_get_display(struct drm_encoder *encoder)
 172 {
 173         return to_exynos_encoder(encoder)->display;
 174 }