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 <drm/drm_atomic_helper.h> 17 #include "exynos_drm_drv.h" 18 #include "exynos_drm_crtc.h" 19 #include "exynos_drm_fb.h" 20 #include "exynos_drm_gem.h" 21 #include "exynos_drm_plane.h" 22 23 static const uint32_t formats[] = { 24 DRM_FORMAT_XRGB8888, 25 DRM_FORMAT_ARGB8888, 26 DRM_FORMAT_NV12, 27 }; 28 29 /* 30 * This function is to get X or Y size shown via screen. This needs length and 31 * start position of CRTC. 32 * 33 * <--- length ---> 34 * CRTC ---------------- 35 * ^ start ^ end 36 * 37 * There are six cases from a to f. 38 * 39 * <----- SCREEN -----> 40 * 0 last 41 * ----------|------------------|---------- 42 * CRTCs 43 * a ------- 44 * b ------- 45 * c -------------------------- 46 * d -------- 47 * e ------- 48 * f ------- 49 */ 50 static int exynos_plane_get_size(int start, unsigned length, unsigned last) 51 { 52 int end = start + length; 53 int size = 0; 54 55 if (start <= 0) { 56 if (end > 0) 57 size = min_t(unsigned, end, last); 58 } else if (start <= last) { 59 size = min_t(unsigned, last - start, length); 60 } 61 62 return size; 63 } 64 65 static void exynos_plane_mode_set(struct drm_plane *plane, 66 struct drm_crtc *crtc, 67 struct drm_framebuffer *fb, 68 int crtc_x, int crtc_y, 69 unsigned int crtc_w, unsigned int crtc_h, 70 uint32_t src_x, uint32_t src_y, 71 uint32_t src_w, uint32_t src_h) 72 { 73 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 74 struct drm_display_mode *mode = &crtc->state->adjusted_mode; 75 unsigned int actual_w; 76 unsigned int actual_h; 77 78 actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay); 79 actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay); 80 81 if (crtc_x < 0) { 82 if (actual_w) 83 src_x -= crtc_x; 84 crtc_x = 0; 85 } 86 87 if (crtc_y < 0) { 88 if (actual_h) 89 src_y -= crtc_y; 90 crtc_y = 0; 91 } 92 93 /* set ratio */ 94 exynos_plane->h_ratio = (src_w << 16) / crtc_w; 95 exynos_plane->v_ratio = (src_h << 16) / crtc_h; 96 97 /* set drm framebuffer data. */ 98 exynos_plane->src_x = src_x; 99 exynos_plane->src_y = src_y; 100 exynos_plane->src_width = (actual_w * exynos_plane->h_ratio) >> 16; 101 exynos_plane->src_height = (actual_h * exynos_plane->v_ratio) >> 16; 102 exynos_plane->fb_width = fb->width; 103 exynos_plane->fb_height = fb->height; 104 exynos_plane->bpp = fb->bits_per_pixel; 105 exynos_plane->pitch = fb->pitches[0]; 106 exynos_plane->pixel_format = fb->pixel_format; 107 108 /* set plane range to be displayed. */ 109 exynos_plane->crtc_x = crtc_x; 110 exynos_plane->crtc_y = crtc_y; 111 exynos_plane->crtc_width = actual_w; 112 exynos_plane->crtc_height = actual_h; 113 114 /* set drm mode data. */ 115 exynos_plane->mode_width = mode->hdisplay; 116 exynos_plane->mode_height = mode->vdisplay; 117 exynos_plane->refresh = mode->vrefresh; 118 exynos_plane->scan_flag = mode->flags; 119 120 DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)", 121 exynos_plane->crtc_x, exynos_plane->crtc_y, 122 exynos_plane->crtc_width, exynos_plane->crtc_height); 123 124 plane->crtc = crtc; 125 } 126 127 static struct drm_plane_funcs exynos_plane_funcs = { 128 .update_plane = drm_atomic_helper_update_plane, 129 .disable_plane = drm_atomic_helper_disable_plane, 130 .destroy = drm_plane_cleanup, 131 .reset = drm_atomic_helper_plane_reset, 132 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 133 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 134 }; 135 136 static int exynos_plane_atomic_check(struct drm_plane *plane, 137 struct drm_plane_state *state) 138 { 139 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 140 int nr; 141 int i; 142 143 if (!state->fb) 144 return 0; 145 146 nr = exynos_drm_fb_get_buf_cnt(state->fb); 147 for (i = 0; i < nr; i++) { 148 struct exynos_drm_gem_buf *buffer = 149 exynos_drm_fb_buffer(state->fb, i); 150 151 if (!buffer) { 152 DRM_DEBUG_KMS("buffer is null\n"); 153 return -EFAULT; 154 } 155 156 exynos_plane->dma_addr[i] = buffer->dma_addr + 157 state->fb->offsets[i]; 158 159 DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n", 160 i, (unsigned long)exynos_plane->dma_addr[i]); 161 } 162 163 return 0; 164 } 165 166 static void exynos_plane_atomic_update(struct drm_plane *plane, 167 struct drm_plane_state *old_state) 168 { 169 struct drm_plane_state *state = plane->state; 170 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc); 171 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 172 173 if (!state->crtc) 174 return; 175 176 exynos_plane_mode_set(plane, state->crtc, state->fb, 177 state->crtc_x, state->crtc_y, 178 state->crtc_w, state->crtc_h, 179 state->src_x >> 16, state->src_y >> 16, 180 state->src_w >> 16, state->src_h >> 16); 181 182 if (exynos_crtc->ops->win_commit) 183 exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos); 184 } 185 186 static void exynos_plane_atomic_disable(struct drm_plane *plane, 187 struct drm_plane_state *old_state) 188 { 189 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane); 190 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc); 191 192 if (!old_state->crtc) 193 return; 194 195 if (exynos_crtc->ops->win_disable) 196 exynos_crtc->ops->win_disable(exynos_crtc, 197 exynos_plane->zpos); 198 } 199 200 static const struct drm_plane_helper_funcs plane_helper_funcs = { 201 .atomic_check = exynos_plane_atomic_check, 202 .atomic_update = exynos_plane_atomic_update, 203 .atomic_disable = exynos_plane_atomic_disable, 204 }; 205 206 static void exynos_plane_attach_zpos_property(struct drm_plane *plane, 207 unsigned int zpos) 208 { 209 struct drm_device *dev = plane->dev; 210 struct exynos_drm_private *dev_priv = dev->dev_private; 211 struct drm_property *prop; 212 213 prop = dev_priv->plane_zpos_property; 214 if (!prop) { 215 prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, 216 "zpos", 0, MAX_PLANE - 1); 217 if (!prop) 218 return; 219 220 dev_priv->plane_zpos_property = prop; 221 } 222 223 drm_object_attach_property(&plane->base, prop, zpos); 224 } 225 226 int exynos_plane_init(struct drm_device *dev, 227 struct exynos_drm_plane *exynos_plane, 228 unsigned long possible_crtcs, enum drm_plane_type type, 229 unsigned int zpos) 230 { 231 int err; 232 233 err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs, 234 &exynos_plane_funcs, formats, 235 ARRAY_SIZE(formats), type); 236 if (err) { 237 DRM_ERROR("failed to initialize plane\n"); 238 return err; 239 } 240 241 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs); 242 243 exynos_plane->zpos = zpos; 244 245 if (type == DRM_PLANE_TYPE_OVERLAY) 246 exynos_plane_attach_zpos_property(&exynos_plane->base, zpos); 247 248 return 0; 249 } 250