1 /* 2 * Copyright 2012 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sub license, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 18 * USE OR OTHER DEALINGS IN THE SOFTWARE. 19 * 20 * The above copyright notice and this permission notice (including the 21 * next paragraph) shall be included in all copies or substantial portions 22 * of the Software. 23 * 24 */ 25 /* 26 * Authors: Dave Airlie <airlied@redhat.com> 27 */ 28 29 #include <linux/pci.h> 30 31 #include <drm/drm_atomic_helper.h> 32 #include <drm/drm_drv.h> 33 #include <drm/drm_gem.h> 34 #include <drm/drm_managed.h> 35 36 #include "ast_drv.h" 37 38 static void ast_detect_widescreen(struct ast_device *ast) 39 { 40 u8 jreg; 41 42 /* Check if we support wide screen */ 43 switch (AST_GEN(ast)) { 44 case 1: 45 ast->support_wide_screen = false; 46 break; 47 default: 48 jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd0, 0xff); 49 if (!(jreg & 0x80)) 50 ast->support_wide_screen = true; 51 else if (jreg & 0x01) 52 ast->support_wide_screen = true; 53 else { 54 ast->support_wide_screen = false; 55 if (ast->chip == AST1300) 56 ast->support_wide_screen = true; 57 if (ast->chip == AST1400) 58 ast->support_wide_screen = true; 59 if (ast->chip == AST2510) 60 ast->support_wide_screen = true; 61 if (IS_AST_GEN7(ast)) 62 ast->support_wide_screen = true; 63 } 64 break; 65 } 66 } 67 68 static void ast_detect_tx_chip(struct ast_device *ast, bool need_post) 69 { 70 struct drm_device *dev = &ast->base; 71 u8 jreg; 72 73 /* Check 3rd Tx option (digital output afaik) */ 74 ast->tx_chip_types |= AST_TX_NONE_BIT; 75 76 /* 77 * VGACRA3 Enhanced Color Mode Register, check if DVO is already 78 * enabled, in that case, assume we have a SIL164 TMDS transmitter 79 * 80 * Don't make that assumption if we the chip wasn't enabled and 81 * is at power-on reset, otherwise we'll incorrectly "detect" a 82 * SIL164 when there is none. 83 */ 84 if (!need_post) { 85 jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xff); 86 if (jreg & 0x80) 87 ast->tx_chip_types = AST_TX_SIL164_BIT; 88 } 89 90 if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast) || IS_AST_GEN6(ast)) { 91 /* 92 * On AST GEN4+, look the configuration set by the SoC in 93 * the SOC scratch register #1 bits 11:8 (interestingly marked 94 * as "reserved" in the spec) 95 */ 96 jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd1, 0xff); 97 switch (jreg) { 98 case 0x04: 99 ast->tx_chip_types = AST_TX_SIL164_BIT; 100 break; 101 case 0x08: 102 ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL); 103 if (ast->dp501_fw_addr) { 104 /* backup firmware */ 105 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) { 106 drmm_kfree(dev, ast->dp501_fw_addr); 107 ast->dp501_fw_addr = NULL; 108 } 109 } 110 fallthrough; 111 case 0x0c: 112 ast->tx_chip_types = AST_TX_DP501_BIT; 113 } 114 } else if (IS_AST_GEN7(ast)) { 115 if (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xD1, TX_TYPE_MASK) == 116 ASTDP_DPMCU_TX) { 117 ast->tx_chip_types = AST_TX_ASTDP_BIT; 118 ast_dp_launch(&ast->base); 119 } 120 } 121 122 /* Print stuff for diagnostic purposes */ 123 if (ast->tx_chip_types & AST_TX_NONE_BIT) 124 drm_info(dev, "Using analog VGA\n"); 125 if (ast->tx_chip_types & AST_TX_SIL164_BIT) 126 drm_info(dev, "Using Sil164 TMDS transmitter\n"); 127 if (ast->tx_chip_types & AST_TX_DP501_BIT) 128 drm_info(dev, "Using DP501 DisplayPort transmitter\n"); 129 if (ast->tx_chip_types & AST_TX_ASTDP_BIT) 130 drm_info(dev, "Using ASPEED DisplayPort transmitter\n"); 131 } 132 133 static int ast_get_dram_info(struct drm_device *dev) 134 { 135 struct device_node *np = dev->dev->of_node; 136 struct ast_device *ast = to_ast_device(dev); 137 uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap; 138 uint32_t denum, num, div, ref_pll, dsel; 139 140 switch (ast->config_mode) { 141 case ast_use_dt: 142 /* 143 * If some properties are missing, use reasonable 144 * defaults for GEN5 145 */ 146 if (of_property_read_u32(np, "aspeed,mcr-configuration", 147 &mcr_cfg)) 148 mcr_cfg = 0x00000577; 149 if (of_property_read_u32(np, "aspeed,mcr-scu-mpll", 150 &mcr_scu_mpll)) 151 mcr_scu_mpll = 0x000050C0; 152 if (of_property_read_u32(np, "aspeed,mcr-scu-strap", 153 &mcr_scu_strap)) 154 mcr_scu_strap = 0; 155 break; 156 case ast_use_p2a: 157 ast_write32(ast, 0xf004, 0x1e6e0000); 158 ast_write32(ast, 0xf000, 0x1); 159 mcr_cfg = ast_read32(ast, 0x10004); 160 mcr_scu_mpll = ast_read32(ast, 0x10120); 161 mcr_scu_strap = ast_read32(ast, 0x10170); 162 break; 163 case ast_use_defaults: 164 default: 165 ast->dram_bus_width = 16; 166 ast->dram_type = AST_DRAM_1Gx16; 167 if (IS_AST_GEN6(ast)) 168 ast->mclk = 800; 169 else 170 ast->mclk = 396; 171 return 0; 172 } 173 174 if (mcr_cfg & 0x40) 175 ast->dram_bus_width = 16; 176 else 177 ast->dram_bus_width = 32; 178 179 if (IS_AST_GEN6(ast)) { 180 switch (mcr_cfg & 0x03) { 181 case 0: 182 ast->dram_type = AST_DRAM_1Gx16; 183 break; 184 default: 185 case 1: 186 ast->dram_type = AST_DRAM_2Gx16; 187 break; 188 case 2: 189 ast->dram_type = AST_DRAM_4Gx16; 190 break; 191 case 3: 192 ast->dram_type = AST_DRAM_8Gx16; 193 break; 194 } 195 } else if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast)) { 196 switch (mcr_cfg & 0x03) { 197 case 0: 198 ast->dram_type = AST_DRAM_512Mx16; 199 break; 200 default: 201 case 1: 202 ast->dram_type = AST_DRAM_1Gx16; 203 break; 204 case 2: 205 ast->dram_type = AST_DRAM_2Gx16; 206 break; 207 case 3: 208 ast->dram_type = AST_DRAM_4Gx16; 209 break; 210 } 211 } else { 212 switch (mcr_cfg & 0x0c) { 213 case 0: 214 case 4: 215 ast->dram_type = AST_DRAM_512Mx16; 216 break; 217 case 8: 218 if (mcr_cfg & 0x40) 219 ast->dram_type = AST_DRAM_1Gx16; 220 else 221 ast->dram_type = AST_DRAM_512Mx32; 222 break; 223 case 0xc: 224 ast->dram_type = AST_DRAM_1Gx32; 225 break; 226 } 227 } 228 229 if (mcr_scu_strap & 0x2000) 230 ref_pll = 14318; 231 else 232 ref_pll = 12000; 233 234 denum = mcr_scu_mpll & 0x1f; 235 num = (mcr_scu_mpll & 0x3fe0) >> 5; 236 dsel = (mcr_scu_mpll & 0xc000) >> 14; 237 switch (dsel) { 238 case 3: 239 div = 0x4; 240 break; 241 case 2: 242 case 1: 243 div = 0x2; 244 break; 245 default: 246 div = 0x1; 247 break; 248 } 249 ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000)); 250 return 0; 251 } 252 253 struct drm_device *ast_device_create(struct pci_dev *pdev, 254 const struct drm_driver *drv, 255 enum ast_chip chip, 256 enum ast_config_mode config_mode, 257 void __iomem *regs, 258 void __iomem *ioregs, 259 bool need_post) 260 { 261 struct drm_device *dev; 262 struct ast_device *ast; 263 int ret; 264 265 ast = devm_drm_dev_alloc(&pdev->dev, drv, struct ast_device, base); 266 if (IS_ERR(ast)) 267 return ERR_CAST(ast); 268 dev = &ast->base; 269 270 ast->chip = chip; 271 ast->config_mode = config_mode; 272 ast->regs = regs; 273 ast->ioregs = ioregs; 274 275 ast_detect_widescreen(ast); 276 ast_detect_tx_chip(ast, need_post); 277 278 ret = ast_get_dram_info(dev); 279 if (ret) 280 return ERR_PTR(ret); 281 282 drm_info(dev, "dram MCLK=%u Mhz type=%d bus_width=%d\n", 283 ast->mclk, ast->dram_type, ast->dram_bus_width); 284 285 if (need_post) 286 ast_post_gpu(dev); 287 288 ret = ast_mm_init(ast); 289 if (ret) 290 return ERR_PTR(ret); 291 292 /* map reserved buffer */ 293 ast->dp501_fw_buf = NULL; 294 if (ast->vram_size < pci_resource_len(pdev, 0)) { 295 ast->dp501_fw_buf = pci_iomap_range(pdev, 0, ast->vram_size, 0); 296 if (!ast->dp501_fw_buf) 297 drm_info(dev, "failed to map reserved buffer!\n"); 298 } 299 300 ret = ast_mode_config_init(ast); 301 if (ret) 302 return ERR_PTR(ret); 303 304 return dev; 305 } 306