1 /* 2 * Copyright 2012 Red Hat Inc. 3 * Parts based on xf86-video-ast 4 * Copyright (c) 2005 ASPEED Technology Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 20 * USE OR OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * The above copyright notice and this permission notice (including the 23 * next paragraph) shall be included in all copies or substantial portions 24 * of the Software. 25 */ 26 /* 27 * Authors: Dave Airlie <airlied@redhat.com> 28 */ 29 30 #include <drm/drm_gem_vram_helper.h> 31 #include <drm/drm_managed.h> 32 33 #include "ast_drv.h" 34 35 static void ast_cursor_fini(struct ast_private *ast) 36 { 37 size_t i; 38 struct drm_gem_vram_object *gbo; 39 40 for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) { 41 gbo = ast->cursor.gbo[i]; 42 drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]); 43 drm_gem_vram_unpin(gbo); 44 drm_gem_vram_put(gbo); 45 } 46 } 47 48 static void ast_cursor_release(struct drm_device *dev, void *ptr) 49 { 50 struct ast_private *ast = dev->dev_private; 51 52 ast_cursor_fini(ast); 53 } 54 55 /* 56 * Allocate cursor BOs and pins them at the end of VRAM. 57 */ 58 int ast_cursor_init(struct ast_private *ast) 59 { 60 struct drm_device *dev = ast->dev; 61 size_t size, i; 62 struct drm_gem_vram_object *gbo; 63 void __iomem *vaddr; 64 int ret; 65 66 size = roundup(AST_HWC_SIZE + AST_HWC_SIGNATURE_SIZE, PAGE_SIZE); 67 68 for (i = 0; i < ARRAY_SIZE(ast->cursor.gbo); ++i) { 69 gbo = drm_gem_vram_create(dev, size, 0); 70 if (IS_ERR(gbo)) { 71 ret = PTR_ERR(gbo); 72 goto err_drm_gem_vram_put; 73 } 74 ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM | 75 DRM_GEM_VRAM_PL_FLAG_TOPDOWN); 76 if (ret) { 77 drm_gem_vram_put(gbo); 78 goto err_drm_gem_vram_put; 79 } 80 vaddr = drm_gem_vram_vmap(gbo); 81 if (IS_ERR(vaddr)) { 82 ret = PTR_ERR(vaddr); 83 drm_gem_vram_unpin(gbo); 84 drm_gem_vram_put(gbo); 85 goto err_drm_gem_vram_put; 86 } 87 88 ast->cursor.gbo[i] = gbo; 89 ast->cursor.vaddr[i] = vaddr; 90 } 91 92 return drmm_add_action_or_reset(dev, ast_cursor_release, NULL); 93 94 err_drm_gem_vram_put: 95 while (i) { 96 --i; 97 gbo = ast->cursor.gbo[i]; 98 drm_gem_vram_vunmap(gbo, ast->cursor.vaddr[i]); 99 drm_gem_vram_unpin(gbo); 100 drm_gem_vram_put(gbo); 101 } 102 return ret; 103 } 104 105 static void update_cursor_image(u8 __iomem *dst, const u8 *src, int width, int height) 106 { 107 union { 108 u32 ul; 109 u8 b[4]; 110 } srcdata32[2], data32; 111 union { 112 u16 us; 113 u8 b[2]; 114 } data16; 115 u32 csum = 0; 116 s32 alpha_dst_delta, last_alpha_dst_delta; 117 u8 __iomem *dstxor; 118 const u8 *srcxor; 119 int i, j; 120 u32 per_pixel_copy, two_pixel_copy; 121 122 alpha_dst_delta = AST_MAX_HWC_WIDTH << 1; 123 last_alpha_dst_delta = alpha_dst_delta - (width << 1); 124 125 srcxor = src; 126 dstxor = (u8 *)dst + last_alpha_dst_delta + (AST_MAX_HWC_HEIGHT - height) * alpha_dst_delta; 127 per_pixel_copy = width & 1; 128 two_pixel_copy = width >> 1; 129 130 for (j = 0; j < height; j++) { 131 for (i = 0; i < two_pixel_copy; i++) { 132 srcdata32[0].ul = *((u32 *)srcxor) & 0xf0f0f0f0; 133 srcdata32[1].ul = *((u32 *)(srcxor + 4)) & 0xf0f0f0f0; 134 data32.b[0] = srcdata32[0].b[1] | (srcdata32[0].b[0] >> 4); 135 data32.b[1] = srcdata32[0].b[3] | (srcdata32[0].b[2] >> 4); 136 data32.b[2] = srcdata32[1].b[1] | (srcdata32[1].b[0] >> 4); 137 data32.b[3] = srcdata32[1].b[3] | (srcdata32[1].b[2] >> 4); 138 139 writel(data32.ul, dstxor); 140 csum += data32.ul; 141 142 dstxor += 4; 143 srcxor += 8; 144 145 } 146 147 for (i = 0; i < per_pixel_copy; i++) { 148 srcdata32[0].ul = *((u32 *)srcxor) & 0xf0f0f0f0; 149 data16.b[0] = srcdata32[0].b[1] | (srcdata32[0].b[0] >> 4); 150 data16.b[1] = srcdata32[0].b[3] | (srcdata32[0].b[2] >> 4); 151 writew(data16.us, dstxor); 152 csum += (u32)data16.us; 153 154 dstxor += 2; 155 srcxor += 4; 156 } 157 dstxor += last_alpha_dst_delta; 158 } 159 160 /* write checksum + signature */ 161 dst += AST_HWC_SIZE; 162 writel(csum, dst); 163 writel(width, dst + AST_HWC_SIGNATURE_SizeX); 164 writel(height, dst + AST_HWC_SIGNATURE_SizeY); 165 writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTX); 166 writel(0, dst + AST_HWC_SIGNATURE_HOTSPOTY); 167 } 168 169 int ast_cursor_blit(struct ast_private *ast, struct drm_framebuffer *fb) 170 { 171 struct drm_device *dev = ast->dev; 172 struct drm_gem_vram_object *gbo; 173 int ret; 174 void *src; 175 void __iomem *dst; 176 177 if (drm_WARN_ON_ONCE(dev, fb->width > AST_MAX_HWC_WIDTH) || 178 drm_WARN_ON_ONCE(dev, fb->height > AST_MAX_HWC_HEIGHT)) 179 return -EINVAL; 180 181 gbo = drm_gem_vram_of_gem(fb->obj[0]); 182 183 ret = drm_gem_vram_pin(gbo, 0); 184 if (ret) 185 return ret; 186 src = drm_gem_vram_vmap(gbo); 187 if (IS_ERR(src)) { 188 ret = PTR_ERR(src); 189 goto err_drm_gem_vram_unpin; 190 } 191 192 dst = ast->cursor.vaddr[ast->cursor.next_index]; 193 194 /* do data transfer to cursor BO */ 195 update_cursor_image(dst, src, fb->width, fb->height); 196 197 drm_gem_vram_vunmap(gbo, src); 198 drm_gem_vram_unpin(gbo); 199 200 return 0; 201 202 err_drm_gem_vram_unpin: 203 drm_gem_vram_unpin(gbo); 204 return ret; 205 } 206 207 static void ast_cursor_set_base(struct ast_private *ast, u64 address) 208 { 209 u8 addr0 = (address >> 3) & 0xff; 210 u8 addr1 = (address >> 11) & 0xff; 211 u8 addr2 = (address >> 19) & 0xff; 212 213 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc8, addr0); 214 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc9, addr1); 215 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xca, addr2); 216 } 217 218 void ast_cursor_page_flip(struct ast_private *ast) 219 { 220 struct drm_device *dev = ast->dev; 221 struct drm_gem_vram_object *gbo; 222 s64 off; 223 224 gbo = ast->cursor.gbo[ast->cursor.next_index]; 225 226 off = drm_gem_vram_offset(gbo); 227 if (drm_WARN_ON_ONCE(dev, off < 0)) 228 return; /* Bug: we didn't pin the cursor HW BO to VRAM. */ 229 230 ast_cursor_set_base(ast, off); 231 232 ++ast->cursor.next_index; 233 ast->cursor.next_index %= ARRAY_SIZE(ast->cursor.gbo); 234 } 235 236 static void ast_cursor_set_location(struct ast_private *ast, u16 x, u16 y, 237 u8 x_offset, u8 y_offset) 238 { 239 u8 x0 = (x & 0x00ff); 240 u8 x1 = (x & 0x0f00) >> 8; 241 u8 y0 = (y & 0x00ff); 242 u8 y1 = (y & 0x0700) >> 8; 243 244 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc2, x_offset); 245 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc3, y_offset); 246 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc4, x0); 247 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc5, x1); 248 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc6, y0); 249 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc7, y1); 250 } 251 252 void ast_cursor_show(struct ast_private *ast, int x, int y, 253 unsigned int offset_x, unsigned int offset_y) 254 { 255 u8 x_offset, y_offset; 256 u8 __iomem *dst, __iomem *sig; 257 u8 jreg; 258 259 dst = ast->cursor.vaddr[ast->cursor.next_index]; 260 261 sig = dst + AST_HWC_SIZE; 262 writel(x, sig + AST_HWC_SIGNATURE_X); 263 writel(y, sig + AST_HWC_SIGNATURE_Y); 264 265 if (x < 0) { 266 x_offset = (-x) + offset_x; 267 x = 0; 268 } else { 269 x_offset = offset_x; 270 } 271 if (y < 0) { 272 y_offset = (-y) + offset_y; 273 y = 0; 274 } else { 275 y_offset = offset_y; 276 } 277 278 ast_cursor_set_location(ast, x, y, x_offset, y_offset); 279 280 /* dummy write to fire HWC */ 281 jreg = 0x02 | 282 0x01; /* enable ARGB4444 cursor */ 283 ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, jreg); 284 } 285 286 void ast_cursor_hide(struct ast_private *ast) 287 { 288 ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xcb, 0xfc, 0x00); 289 } 290