1 /* 2 * Copyright (C) 2011 Samsung Electronics Co.Ltd 3 * Authors: Joonyoung Shim <jy0922.shim@samsung.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License as published by the 7 * Free Software Foundation; either version 2 of the License, or (at your 8 * option) any later version. 9 * 10 */ 11 12 #include <drm/drmP.h> 13 14 #include <drm/exynos_drm.h> 15 #include <drm/drm_plane_helper.h> 16 #include "exynos_drm_drv.h" 17 #include "exynos_drm_crtc.h" 18 #include "exynos_drm_fb.h" 19 #include "exynos_drm_gem.h" 20 #include "exynos_drm_plane.h" 21 22 static const uint32_t formats[] = { 23 DRM_FORMAT_XRGB8888, 24 DRM_FORMAT_ARGB8888, 25 DRM_FORMAT_NV12, 26 }; 27 28 /* 29 * This function is to get X or Y size shown via screen. This needs length and 30 * start position of CRTC. 31 * 32 * <--- length ---> 33 * CRTC ---------------- 34 * ^ start ^ end 35 * 36 * There are six cases from a to f. 37 * 38 * <----- SCREEN -----> 39 * 0 last 40 * ----------|------------------|---------- 41 * CRTCs 42 * a ------- 43 * b ------- 44 * c -------------------------- 45 * d -------- 46 * e ------- 47 * f ------- 48 */ 49 static int exynos_plane_get_size(int start, unsigned length, unsigned last) 50 { 51 int end = start + length; 52 int size = 0; 53 54 if (start <= 0) { 55 if (end > 0) 56 size = min_t(unsigned, end, last); 57 } else if (start <= last) { 58 size = min_t(unsigned, last - start, length); 59 } 60 61 return size; 62 } 63 64 int exynos_check_plane(struct drm_plane *plane, struct drm_framebuffer *fb) 65 { 66 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 67 int nr; 68 int i; 69 70 nr = exynos_drm_fb_get_buf_cnt(fb); 71 for (i = 0; i < nr; i++) { 72 struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i); 73 74 if (!buffer) { 75 DRM_DEBUG_KMS("buffer is null\n"); 76 return -EFAULT; 77 } 78 79 exynos_plane->dma_addr[i] = buffer->dma_addr; 80 81 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n", 82 i, (unsigned long)exynos_plane->dma_addr[i]); 83 } 84 85 return 0; 86 } 87 88 void exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc, 89 struct drm_framebuffer *fb, int crtc_x, int crtc_y, 90 unsigned int crtc_w, unsigned int crtc_h, 91 uint32_t src_x, uint32_t src_y, 92 uint32_t src_w, uint32_t src_h) 93 { 94 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 95 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 96 unsigned int actual_w; 97 unsigned int actual_h; 98 99 actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay); 100 actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay); 101 102 if (crtc_x < 0) { 103 if (actual_w) 104 src_x -= crtc_x; 105 crtc_x = 0; 106 } 107 108 if (crtc_y < 0) { 109 if (actual_h) 110 src_y -= crtc_y; 111 crtc_y = 0; 112 } 113 114 /* set drm framebuffer data. */ 115 exynos_plane->fb_x = src_x; 116 exynos_plane->fb_y = src_y; 117 exynos_plane->fb_width = fb->width; 118 exynos_plane->fb_height = fb->height; 119 exynos_plane->src_width = src_w; 120 exynos_plane->src_height = src_h; 121 exynos_plane->bpp = fb->bits_per_pixel; 122 exynos_plane->pitch = fb->pitches[0]; 123 exynos_plane->pixel_format = fb->pixel_format; 124 125 /* set plane range to be displayed. */ 126 exynos_plane->crtc_x = crtc_x; 127 exynos_plane->crtc_y = crtc_y; 128 exynos_plane->crtc_width = actual_w; 129 exynos_plane->crtc_height = actual_h; 130 131 /* set drm mode data. */ 132 exynos_plane->mode_width = crtc->mode.hdisplay; 133 exynos_plane->mode_height = crtc->mode.vdisplay; 134 exynos_plane->refresh = crtc->mode.vrefresh; 135 exynos_plane->scan_flag = crtc->mode.flags; 136 137 DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)", 138 exynos_plane->crtc_x, exynos_plane->crtc_y, 139 exynos_plane->crtc_width, exynos_plane->crtc_height); 140 141 plane->crtc = crtc; 142 143 if (exynos_crtc->ops->win_mode_set) 144 exynos_crtc->ops->win_mode_set(exynos_crtc, exynos_plane); 145 } 146 147 int 148 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc, 149 struct drm_framebuffer *fb, int crtc_x, int crtc_y, 150 unsigned int crtc_w, unsigned int crtc_h, 151 uint32_t src_x, uint32_t src_y, 152 uint32_t src_w, uint32_t src_h) 153 { 154 155 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 156 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 157 int ret; 158 159 ret = exynos_check_plane(plane, fb); 160 if (ret < 0) 161 return ret; 162 163 exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y, 164 crtc_w, crtc_h, src_x >> 16, src_y >> 16, 165 src_w >> 16, src_h >> 16); 166 167 if (exynos_crtc->ops->win_commit) 168 exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos); 169 170 return 0; 171 } 172 173 static int exynos_disable_plane(struct drm_plane *plane) 174 { 175 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 176 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(plane->crtc); 177 178 if (exynos_crtc->ops->win_disable) 179 exynos_crtc->ops->win_disable(exynos_crtc, 180 exynos_plane->zpos); 181 182 return 0; 183 } 184 185 static void exynos_plane_destroy(struct drm_plane *plane) 186 { 187 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 188 189 exynos_disable_plane(plane); 190 drm_plane_cleanup(plane); 191 kfree(exynos_plane); 192 } 193 194 static int exynos_plane_set_property(struct drm_plane *plane, 195 struct drm_property *property, 196 uint64_t val) 197 { 198 struct drm_device *dev = plane->dev; 199 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 200 struct exynos_drm_private *dev_priv = dev->dev_private; 201 202 if (property == dev_priv->plane_zpos_property) { 203 exynos_plane->zpos = val; 204 return 0; 205 } 206 207 return -EINVAL; 208 } 209 210 static struct drm_plane_funcs exynos_plane_funcs = { 211 .update_plane = exynos_update_plane, 212 .disable_plane = exynos_disable_plane, 213 .destroy = exynos_plane_destroy, 214 .set_property = exynos_plane_set_property, 215 }; 216 217 static void exynos_plane_attach_zpos_property(struct drm_plane *plane) 218 { 219 struct drm_device *dev = plane->dev; 220 struct exynos_drm_private *dev_priv = dev->dev_private; 221 struct drm_property *prop; 222 223 prop = dev_priv->plane_zpos_property; 224 if (!prop) { 225 prop = drm_property_create_range(dev, 0, "zpos", 0, 226 MAX_PLANE - 1); 227 if (!prop) 228 return; 229 230 dev_priv->plane_zpos_property = prop; 231 } 232 233 drm_object_attach_property(&plane->base, prop, 0); 234 } 235 236 struct drm_plane *exynos_plane_init(struct drm_device *dev, 237 unsigned long possible_crtcs, 238 enum drm_plane_type type) 239 { 240 struct exynos_drm_plane *exynos_plane; 241 int err; 242 243 exynos_plane = kzalloc(sizeof(struct exynos_drm_plane), GFP_KERNEL); 244 if (!exynos_plane) 245 return ERR_PTR(-ENOMEM); 246 247 err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs, 248 &exynos_plane_funcs, formats, 249 ARRAY_SIZE(formats), type); 250 if (err) { 251 DRM_ERROR("failed to initialize plane\n"); 252 kfree(exynos_plane); 253 return ERR_PTR(err); 254 } 255 256 if (type == DRM_PLANE_TYPE_PRIMARY) 257 exynos_plane->zpos = DEFAULT_ZPOS; 258 else 259 exynos_plane_attach_zpos_property(&exynos_plane->base); 260 261 return &exynos_plane->base; 262 } 263