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5060 | serge | 1 | /* |
2 | * Copyright (C) 2014 Intel Corporation |
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3 | * |
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4 | * DRM universal plane helper functions |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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7 | * copy of this software and associated documentation files (the "Software"), |
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8 | * to deal in the Software without restriction, including without limitation |
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9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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10 | * and/or sell copies of the Software, and to permit persons to whom the |
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11 | * Software is furnished to do so, subject to the following conditions: |
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12 | * |
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13 | * The above copyright notice and this permission notice (including the next |
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14 | * paragraph) shall be included in all copies or substantial portions of the |
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15 | * Software. |
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16 | * |
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17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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23 | * SOFTWARE. |
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24 | */ |
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25 | |||
26 | #include |
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27 | #include |
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28 | #include |
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29 | #include |
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5271 | serge | 30 | #include |
31 | #include |
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32 | #include |
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5060 | serge | 33 | |
34 | #define SUBPIXEL_MASK 0xffff |
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35 | |||
5271 | serge | 36 | /** |
37 | * DOC: overview |
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38 | * |
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39 | * This helper library has two parts. The first part has support to implement |
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40 | * primary plane support on top of the normal CRTC configuration interface. |
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41 | * Since the legacy ->set_config interface ties the primary plane together with |
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42 | * the CRTC state this does not allow userspace to disable the primary plane |
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43 | * itself. To avoid too much duplicated code use |
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44 | * drm_plane_helper_check_update() which can be used to enforce the same |
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45 | * restrictions as primary planes had thus. The default primary plane only |
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46 | * expose XRBG8888 and ARGB8888 as valid pixel formats for the attached |
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47 | * framebuffer. |
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48 | * |
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49 | * Drivers are highly recommended to implement proper support for primary |
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50 | * planes, and newly merged drivers must not rely upon these transitional |
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51 | * helpers. |
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52 | * |
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53 | * The second part also implements transitional helpers which allow drivers to |
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54 | * gradually switch to the atomic helper infrastructure for plane updates. Once |
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55 | * that switch is complete drivers shouldn't use these any longer, instead using |
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56 | * the proper legacy implementations for update and disable plane hooks provided |
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57 | * by the atomic helpers. |
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58 | * |
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59 | * Again drivers are strongly urged to switch to the new interfaces. |
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60 | */ |
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61 | |||
5060 | serge | 62 | /* |
63 | * This is the minimal list of formats that seem to be safe for modeset use |
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64 | * with all current DRM drivers. Most hardware can actually support more |
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65 | * formats than this and drivers may specify a more accurate list when |
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66 | * creating the primary plane. However drivers that still call |
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67 | * drm_plane_init() will use this minimal format list as the default. |
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68 | */ |
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69 | static const uint32_t safe_modeset_formats[] = { |
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70 | DRM_FORMAT_XRGB8888, |
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71 | DRM_FORMAT_ARGB8888, |
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72 | }; |
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73 | |||
74 | /* |
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75 | * Returns the connectors currently associated with a CRTC. This function |
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76 | * should be called twice: once with a NULL connector list to retrieve |
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77 | * the list size, and once with the properly allocated list to be filled in. |
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78 | */ |
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79 | static int get_connectors_for_crtc(struct drm_crtc *crtc, |
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80 | struct drm_connector **connector_list, |
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81 | int num_connectors) |
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82 | { |
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83 | struct drm_device *dev = crtc->dev; |
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84 | struct drm_connector *connector; |
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85 | int count = 0; |
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86 | |||
87 | /* |
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88 | * Note: Once we change the plane hooks to more fine-grained locking we |
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89 | * need to grab the connection_mutex here to be able to make these |
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90 | * checks. |
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91 | */ |
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92 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
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93 | |||
6084 | serge | 94 | drm_for_each_connector(connector, dev) { |
5060 | serge | 95 | if (connector->encoder && connector->encoder->crtc == crtc) { |
96 | if (connector_list != NULL && count < num_connectors) |
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97 | *(connector_list++) = connector; |
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98 | |||
99 | count++; |
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100 | } |
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6084 | serge | 101 | } |
5060 | serge | 102 | |
103 | return count; |
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104 | } |
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105 | |||
106 | /** |
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107 | * drm_plane_helper_check_update() - Check plane update for validity |
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108 | * @plane: plane object to update |
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109 | * @crtc: owning CRTC of owning plane |
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110 | * @fb: framebuffer to flip onto plane |
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111 | * @src: source coordinates in 16.16 fixed point |
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112 | * @dest: integer destination coordinates |
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113 | * @clip: integer clipping coordinates |
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114 | * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point |
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115 | * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point |
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116 | * @can_position: is it legal to position the plane such that it |
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117 | * doesn't cover the entire crtc? This will generally |
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118 | * only be false for primary planes. |
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119 | * @can_update_disabled: can the plane be updated while the crtc |
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120 | * is disabled? |
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121 | * @visible: output parameter indicating whether plane is still visible after |
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122 | * clipping |
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123 | * |
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124 | * Checks that a desired plane update is valid. Drivers that provide |
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125 | * their own plane handling rather than helper-provided implementations may |
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126 | * still wish to call this function to avoid duplication of error checking |
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127 | * code. |
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128 | * |
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129 | * RETURNS: |
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130 | * Zero if update appears valid, error code on failure |
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131 | */ |
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132 | int drm_plane_helper_check_update(struct drm_plane *plane, |
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133 | struct drm_crtc *crtc, |
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134 | struct drm_framebuffer *fb, |
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135 | struct drm_rect *src, |
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136 | struct drm_rect *dest, |
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137 | const struct drm_rect *clip, |
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138 | int min_scale, |
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139 | int max_scale, |
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140 | bool can_position, |
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141 | bool can_update_disabled, |
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142 | bool *visible) |
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143 | { |
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144 | int hscale, vscale; |
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145 | |||
6084 | serge | 146 | if (!fb) { |
147 | *visible = false; |
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148 | return 0; |
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149 | } |
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150 | |||
151 | /* crtc should only be NULL when disabling (i.e., !fb) */ |
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152 | if (WARN_ON(!crtc)) { |
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153 | *visible = false; |
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154 | return 0; |
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155 | } |
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156 | |||
5060 | serge | 157 | if (!crtc->enabled && !can_update_disabled) { |
158 | DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n"); |
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159 | return -EINVAL; |
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160 | } |
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161 | |||
162 | /* Check scaling */ |
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163 | hscale = drm_rect_calc_hscale(src, dest, min_scale, max_scale); |
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164 | vscale = drm_rect_calc_vscale(src, dest, min_scale, max_scale); |
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165 | if (hscale < 0 || vscale < 0) { |
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166 | DRM_DEBUG_KMS("Invalid scaling of plane\n"); |
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167 | return -ERANGE; |
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168 | } |
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169 | |||
170 | *visible = drm_rect_clip_scaled(src, dest, clip, hscale, vscale); |
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171 | if (!*visible) |
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172 | /* |
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173 | * Plane isn't visible; some drivers can handle this |
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174 | * so we just return success here. Drivers that can't |
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175 | * (including those that use the primary plane helper's |
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176 | * update function) will return an error from their |
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177 | * update_plane handler. |
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178 | */ |
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179 | return 0; |
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180 | |||
181 | if (!can_position && !drm_rect_equals(dest, clip)) { |
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182 | DRM_DEBUG_KMS("Plane must cover entire CRTC\n"); |
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183 | return -EINVAL; |
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184 | } |
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185 | |||
186 | return 0; |
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187 | } |
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188 | EXPORT_SYMBOL(drm_plane_helper_check_update); |
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189 | |||
190 | /** |
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191 | * drm_primary_helper_update() - Helper for primary plane update |
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192 | * @plane: plane object to update |
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193 | * @crtc: owning CRTC of owning plane |
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194 | * @fb: framebuffer to flip onto plane |
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195 | * @crtc_x: x offset of primary plane on crtc |
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196 | * @crtc_y: y offset of primary plane on crtc |
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197 | * @crtc_w: width of primary plane rectangle on crtc |
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198 | * @crtc_h: height of primary plane rectangle on crtc |
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199 | * @src_x: x offset of @fb for panning |
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200 | * @src_y: y offset of @fb for panning |
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201 | * @src_w: width of source rectangle in @fb |
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202 | * @src_h: height of source rectangle in @fb |
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203 | * |
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204 | * Provides a default plane update handler for primary planes. This is handler |
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205 | * is called in response to a userspace SetPlane operation on the plane with a |
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206 | * non-NULL framebuffer. We call the driver's modeset handler to update the |
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207 | * framebuffer. |
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208 | * |
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209 | * SetPlane() on a primary plane of a disabled CRTC is not supported, and will |
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210 | * return an error. |
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211 | * |
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212 | * Note that we make some assumptions about hardware limitations that may not be |
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213 | * true for all hardware -- |
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214 | * 1) Primary plane cannot be repositioned. |
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215 | * 2) Primary plane cannot be scaled. |
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216 | * 3) Primary plane must cover the entire CRTC. |
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217 | * 4) Subpixel positioning is not supported. |
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218 | * Drivers for hardware that don't have these restrictions can provide their |
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219 | * own implementation rather than using this helper. |
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220 | * |
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221 | * RETURNS: |
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222 | * Zero on success, error code on failure |
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223 | */ |
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224 | int drm_primary_helper_update(struct drm_plane *plane, struct drm_crtc *crtc, |
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225 | struct drm_framebuffer *fb, |
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226 | int crtc_x, int crtc_y, |
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227 | unsigned int crtc_w, unsigned int crtc_h, |
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228 | uint32_t src_x, uint32_t src_y, |
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229 | uint32_t src_w, uint32_t src_h) |
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230 | { |
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231 | struct drm_mode_set set = { |
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232 | .crtc = crtc, |
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233 | .fb = fb, |
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234 | .mode = &crtc->mode, |
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235 | .x = src_x >> 16, |
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236 | .y = src_y >> 16, |
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237 | }; |
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238 | struct drm_rect src = { |
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239 | .x1 = src_x, |
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240 | .y1 = src_y, |
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241 | .x2 = src_x + src_w, |
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242 | .y2 = src_y + src_h, |
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243 | }; |
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244 | struct drm_rect dest = { |
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245 | .x1 = crtc_x, |
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246 | .y1 = crtc_y, |
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247 | .x2 = crtc_x + crtc_w, |
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248 | .y2 = crtc_y + crtc_h, |
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249 | }; |
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250 | const struct drm_rect clip = { |
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251 | .x2 = crtc->mode.hdisplay, |
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252 | .y2 = crtc->mode.vdisplay, |
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253 | }; |
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254 | struct drm_connector **connector_list; |
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255 | int num_connectors, ret; |
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256 | bool visible; |
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257 | |||
258 | ret = drm_plane_helper_check_update(plane, crtc, fb, |
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259 | &src, &dest, &clip, |
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260 | DRM_PLANE_HELPER_NO_SCALING, |
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261 | DRM_PLANE_HELPER_NO_SCALING, |
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262 | false, false, &visible); |
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263 | if (ret) |
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264 | return ret; |
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265 | |||
266 | if (!visible) |
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267 | /* |
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268 | * Primary plane isn't visible. Note that unless a driver |
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269 | * provides their own disable function, this will just |
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270 | * wind up returning -EINVAL to userspace. |
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271 | */ |
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272 | return plane->funcs->disable_plane(plane); |
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273 | |||
274 | /* Find current connectors for CRTC */ |
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275 | num_connectors = get_connectors_for_crtc(crtc, NULL, 0); |
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276 | BUG_ON(num_connectors == 0); |
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277 | connector_list = kzalloc(num_connectors * sizeof(*connector_list), |
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278 | GFP_KERNEL); |
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279 | if (!connector_list) |
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280 | return -ENOMEM; |
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281 | get_connectors_for_crtc(crtc, connector_list, num_connectors); |
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282 | |||
283 | set.connectors = connector_list; |
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284 | set.num_connectors = num_connectors; |
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285 | |||
286 | /* |
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287 | * We call set_config() directly here rather than using |
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288 | * drm_mode_set_config_internal. We're reprogramming the same |
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289 | * connectors that were already in use, so we shouldn't need the extra |
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290 | * cross-CRTC fb refcounting to accomodate stealing connectors. |
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291 | * drm_mode_setplane() already handles the basic refcounting for the |
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292 | * framebuffers involved in this operation. |
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293 | */ |
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294 | ret = crtc->funcs->set_config(&set); |
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295 | |||
296 | kfree(connector_list); |
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297 | return ret; |
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298 | } |
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299 | EXPORT_SYMBOL(drm_primary_helper_update); |
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300 | |||
301 | /** |
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302 | * drm_primary_helper_disable() - Helper for primary plane disable |
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303 | * @plane: plane to disable |
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304 | * |
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305 | * Provides a default plane disable handler for primary planes. This is handler |
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306 | * is called in response to a userspace SetPlane operation on the plane with a |
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307 | * NULL framebuffer parameter. It unconditionally fails the disable call with |
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308 | * -EINVAL the only way to disable the primary plane without driver support is |
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309 | * to disable the entier CRTC. Which does not match the plane ->disable hook. |
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310 | * |
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311 | * Note that some hardware may be able to disable the primary plane without |
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312 | * disabling the whole CRTC. Drivers for such hardware should provide their |
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313 | * own disable handler that disables just the primary plane (and they'll likely |
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314 | * need to provide their own update handler as well to properly re-enable a |
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315 | * disabled primary plane). |
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316 | * |
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317 | * RETURNS: |
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318 | * Unconditionally returns -EINVAL. |
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319 | */ |
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320 | int drm_primary_helper_disable(struct drm_plane *plane) |
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321 | { |
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322 | return -EINVAL; |
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323 | } |
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324 | EXPORT_SYMBOL(drm_primary_helper_disable); |
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325 | |||
326 | /** |
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327 | * drm_primary_helper_destroy() - Helper for primary plane destruction |
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328 | * @plane: plane to destroy |
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329 | * |
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330 | * Provides a default plane destroy handler for primary planes. This handler |
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331 | * is called during CRTC destruction. We disable the primary plane, remove |
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332 | * it from the DRM plane list, and deallocate the plane structure. |
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333 | */ |
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334 | void drm_primary_helper_destroy(struct drm_plane *plane) |
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335 | { |
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336 | drm_plane_cleanup(plane); |
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337 | kfree(plane); |
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338 | } |
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339 | EXPORT_SYMBOL(drm_primary_helper_destroy); |
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340 | |||
341 | const struct drm_plane_funcs drm_primary_helper_funcs = { |
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342 | .update_plane = drm_primary_helper_update, |
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343 | .disable_plane = drm_primary_helper_disable, |
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344 | .destroy = drm_primary_helper_destroy, |
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345 | }; |
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346 | EXPORT_SYMBOL(drm_primary_helper_funcs); |
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347 | |||
6084 | serge | 348 | static struct drm_plane *create_primary_plane(struct drm_device *dev) |
5060 | serge | 349 | { |
350 | struct drm_plane *primary; |
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351 | int ret; |
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352 | |||
353 | primary = kzalloc(sizeof(*primary), GFP_KERNEL); |
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354 | if (primary == NULL) { |
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355 | DRM_DEBUG_KMS("Failed to allocate primary plane\n"); |
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356 | return NULL; |
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357 | } |
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358 | |||
6084 | serge | 359 | /* |
360 | * Remove the format_default field from drm_plane when dropping |
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361 | * this helper. |
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362 | */ |
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363 | primary->format_default = true; |
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5060 | serge | 364 | |
365 | /* possible_crtc's will be filled in later by crtc_init */ |
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366 | ret = drm_universal_plane_init(dev, primary, 0, |
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367 | &drm_primary_helper_funcs, |
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6084 | serge | 368 | safe_modeset_formats, |
369 | ARRAY_SIZE(safe_modeset_formats), |
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370 | DRM_PLANE_TYPE_PRIMARY); |
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5060 | serge | 371 | if (ret) { |
372 | kfree(primary); |
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373 | primary = NULL; |
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374 | } |
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375 | |||
376 | return primary; |
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377 | } |
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378 | |||
379 | /** |
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380 | * drm_crtc_init - Legacy CRTC initialization function |
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381 | * @dev: DRM device |
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382 | * @crtc: CRTC object to init |
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383 | * @funcs: callbacks for the new CRTC |
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384 | * |
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385 | * Initialize a CRTC object with a default helper-provided primary plane and no |
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386 | * cursor plane. |
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387 | * |
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388 | * Returns: |
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389 | * Zero on success, error code on failure. |
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390 | */ |
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391 | int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc, |
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392 | const struct drm_crtc_funcs *funcs) |
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393 | { |
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394 | struct drm_plane *primary; |
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395 | |||
6084 | serge | 396 | primary = create_primary_plane(dev); |
5060 | serge | 397 | return drm_crtc_init_with_planes(dev, crtc, primary, NULL, funcs); |
398 | } |
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399 | EXPORT_SYMBOL(drm_crtc_init); |
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5271 | serge | 400 | |
401 | int drm_plane_helper_commit(struct drm_plane *plane, |
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402 | struct drm_plane_state *plane_state, |
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403 | struct drm_framebuffer *old_fb) |
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404 | { |
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6084 | serge | 405 | const struct drm_plane_helper_funcs *plane_funcs; |
5271 | serge | 406 | struct drm_crtc *crtc[2]; |
6084 | serge | 407 | const struct drm_crtc_helper_funcs *crtc_funcs[2]; |
5271 | serge | 408 | int i, ret = 0; |
409 | |||
410 | plane_funcs = plane->helper_private; |
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411 | |||
412 | /* Since this is a transitional helper we can't assume that plane->state |
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413 | * is always valid. Hence we need to use plane->crtc instead of |
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414 | * plane->state->crtc as the old crtc. */ |
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415 | crtc[0] = plane->crtc; |
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416 | crtc[1] = crtc[0] != plane_state->crtc ? plane_state->crtc : NULL; |
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417 | |||
418 | for (i = 0; i < 2; i++) |
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419 | crtc_funcs[i] = crtc[i] ? crtc[i]->helper_private : NULL; |
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420 | |||
421 | if (plane_funcs->atomic_check) { |
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422 | ret = plane_funcs->atomic_check(plane, plane_state); |
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423 | if (ret) |
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424 | goto out; |
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425 | } |
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426 | |||
6084 | serge | 427 | if (plane_funcs->prepare_fb && plane_state->fb && |
428 | plane_state->fb != old_fb) { |
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429 | ret = plane_funcs->prepare_fb(plane, |
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430 | plane_state); |
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5271 | serge | 431 | if (ret) |
432 | goto out; |
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433 | } |
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434 | |||
435 | /* Point of no return, commit sw state. */ |
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436 | swap(plane->state, plane_state); |
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437 | |||
438 | for (i = 0; i < 2; i++) { |
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439 | if (crtc_funcs[i] && crtc_funcs[i]->atomic_begin) |
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6084 | serge | 440 | crtc_funcs[i]->atomic_begin(crtc[i], crtc[i]->state); |
5271 | serge | 441 | } |
442 | |||
6084 | serge | 443 | /* |
444 | * Drivers may optionally implement the ->atomic_disable callback, so |
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445 | * special-case that here. |
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446 | */ |
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447 | if (drm_atomic_plane_disabling(plane, plane_state) && |
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448 | plane_funcs->atomic_disable) |
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449 | plane_funcs->atomic_disable(plane, plane_state); |
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450 | else |
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451 | plane_funcs->atomic_update(plane, plane_state); |
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5271 | serge | 452 | |
453 | for (i = 0; i < 2; i++) { |
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454 | if (crtc_funcs[i] && crtc_funcs[i]->atomic_flush) |
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6084 | serge | 455 | crtc_funcs[i]->atomic_flush(crtc[i], crtc[i]->state); |
5271 | serge | 456 | } |
457 | |||
6084 | serge | 458 | /* |
459 | * If we only moved the plane and didn't change fb's, there's no need to |
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460 | * wait for vblank. |
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461 | */ |
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462 | if (plane->state->fb == old_fb) |
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463 | goto out; |
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464 | |||
5271 | serge | 465 | for (i = 0; i < 2; i++) { |
466 | if (!crtc[i]) |
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467 | continue; |
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468 | |||
6084 | serge | 469 | if (crtc[i]->cursor == plane) |
470 | continue; |
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471 | |||
5271 | serge | 472 | /* There's no other way to figure out whether the crtc is running. */ |
473 | ret = drm_crtc_vblank_get(crtc[i]); |
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474 | if (ret == 0) { |
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475 | drm_crtc_wait_one_vblank(crtc[i]); |
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476 | drm_crtc_vblank_put(crtc[i]); |
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477 | } |
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478 | |||
479 | ret = 0; |
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480 | } |
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481 | |||
6084 | serge | 482 | if (plane_funcs->cleanup_fb) |
483 | plane_funcs->cleanup_fb(plane, plane_state); |
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5271 | serge | 484 | out: |
485 | if (plane_state) { |
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486 | if (plane->funcs->atomic_destroy_state) |
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487 | plane->funcs->atomic_destroy_state(plane, plane_state); |
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488 | else |
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489 | drm_atomic_helper_plane_destroy_state(plane, plane_state); |
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490 | } |
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491 | |||
492 | return ret; |
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493 | } |
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494 | |||
495 | /** |
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6084 | serge | 496 | * drm_plane_helper_update() - Transitional helper for plane update |
5271 | serge | 497 | * @plane: plane object to update |
498 | * @crtc: owning CRTC of owning plane |
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499 | * @fb: framebuffer to flip onto plane |
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500 | * @crtc_x: x offset of primary plane on crtc |
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501 | * @crtc_y: y offset of primary plane on crtc |
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502 | * @crtc_w: width of primary plane rectangle on crtc |
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503 | * @crtc_h: height of primary plane rectangle on crtc |
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504 | * @src_x: x offset of @fb for panning |
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505 | * @src_y: y offset of @fb for panning |
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506 | * @src_w: width of source rectangle in @fb |
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507 | * @src_h: height of source rectangle in @fb |
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508 | * |
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509 | * Provides a default plane update handler using the atomic plane update |
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510 | * functions. It is fully left to the driver to check plane constraints and |
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511 | * handle corner-cases like a fully occluded or otherwise invisible plane. |
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512 | * |
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513 | * This is useful for piecewise transitioning of a driver to the atomic helpers. |
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514 | * |
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515 | * RETURNS: |
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516 | * Zero on success, error code on failure |
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517 | */ |
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518 | int drm_plane_helper_update(struct drm_plane *plane, struct drm_crtc *crtc, |
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519 | struct drm_framebuffer *fb, |
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520 | int crtc_x, int crtc_y, |
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521 | unsigned int crtc_w, unsigned int crtc_h, |
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522 | uint32_t src_x, uint32_t src_y, |
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523 | uint32_t src_w, uint32_t src_h) |
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524 | { |
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525 | struct drm_plane_state *plane_state; |
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526 | |||
527 | if (plane->funcs->atomic_duplicate_state) |
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528 | plane_state = plane->funcs->atomic_duplicate_state(plane); |
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6084 | serge | 529 | else { |
530 | if (!plane->state) |
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531 | drm_atomic_helper_plane_reset(plane); |
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532 | |||
5271 | serge | 533 | plane_state = drm_atomic_helper_plane_duplicate_state(plane); |
6084 | serge | 534 | } |
5271 | serge | 535 | if (!plane_state) |
536 | return -ENOMEM; |
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6084 | serge | 537 | plane_state->plane = plane; |
5271 | serge | 538 | |
539 | plane_state->crtc = crtc; |
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540 | drm_atomic_set_fb_for_plane(plane_state, fb); |
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541 | plane_state->crtc_x = crtc_x; |
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542 | plane_state->crtc_y = crtc_y; |
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543 | plane_state->crtc_h = crtc_h; |
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544 | plane_state->crtc_w = crtc_w; |
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545 | plane_state->src_x = src_x; |
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546 | plane_state->src_y = src_y; |
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547 | plane_state->src_h = src_h; |
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548 | plane_state->src_w = src_w; |
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549 | |||
550 | return drm_plane_helper_commit(plane, plane_state, plane->fb); |
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551 | } |
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552 | EXPORT_SYMBOL(drm_plane_helper_update); |
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553 | |||
554 | /** |
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6084 | serge | 555 | * drm_plane_helper_disable() - Transitional helper for plane disable |
5271 | serge | 556 | * @plane: plane to disable |
557 | * |
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558 | * Provides a default plane disable handler using the atomic plane update |
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559 | * functions. It is fully left to the driver to check plane constraints and |
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560 | * handle corner-cases like a fully occluded or otherwise invisible plane. |
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561 | * |
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562 | * This is useful for piecewise transitioning of a driver to the atomic helpers. |
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563 | * |
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564 | * RETURNS: |
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565 | * Zero on success, error code on failure |
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566 | */ |
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567 | int drm_plane_helper_disable(struct drm_plane *plane) |
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568 | { |
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569 | struct drm_plane_state *plane_state; |
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570 | |||
571 | /* crtc helpers love to call disable functions for already disabled hw |
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572 | * functions. So cope with that. */ |
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573 | if (!plane->crtc) |
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574 | return 0; |
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575 | |||
576 | if (plane->funcs->atomic_duplicate_state) |
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577 | plane_state = plane->funcs->atomic_duplicate_state(plane); |
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6084 | serge | 578 | else { |
579 | if (!plane->state) |
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580 | drm_atomic_helper_plane_reset(plane); |
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581 | |||
5271 | serge | 582 | plane_state = drm_atomic_helper_plane_duplicate_state(plane); |
6084 | serge | 583 | } |
5271 | serge | 584 | if (!plane_state) |
585 | return -ENOMEM; |
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6084 | serge | 586 | plane_state->plane = plane; |
5271 | serge | 587 | |
588 | plane_state->crtc = NULL; |
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589 | drm_atomic_set_fb_for_plane(plane_state, NULL); |
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590 | |||
591 | return drm_plane_helper_commit(plane, plane_state, plane->fb); |
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592 | } |
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593 | EXPORT_SYMBOL(drm_plane_helper_disable);>>>>>>> |