1 // SPDX-License-Identifier: GPL-2.0-only 2 /************************************************************************** 3 * Copyright (c) 2011, Intel Corporation. 4 * All Rights Reserved. 5 * 6 **************************************************************************/ 7 8 /* TODO 9 * - Split functions by vbt type 10 * - Make them all take drm_device 11 * - Check ioremap failures 12 */ 13 14 #include <drm/drm.h> 15 16 #include "mid_bios.h" 17 #include "psb_drv.h" 18 19 static void mid_get_fuse_settings(struct drm_device *dev) 20 { 21 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 22 struct pci_dev *pdev = to_pci_dev(dev->dev); 23 struct pci_dev *pci_root = 24 pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus), 25 0, 0); 26 uint32_t fuse_value = 0; 27 uint32_t fuse_value_tmp = 0; 28 29 #define FB_REG06 0xD0810600 30 #define FB_MIPI_DISABLE (1 << 11) 31 #define FB_REG09 0xD0810900 32 #define FB_SKU_MASK 0x7000 33 #define FB_SKU_SHIFT 12 34 #define FB_SKU_100 0 35 #define FB_SKU_100L 1 36 #define FB_SKU_83 2 37 if (pci_root == NULL) { 38 WARN_ON(1); 39 return; 40 } 41 42 43 pci_write_config_dword(pci_root, 0xD0, FB_REG06); 44 pci_read_config_dword(pci_root, 0xD4, &fuse_value); 45 46 /* FB_MIPI_DISABLE doesn't mean LVDS on with Medfield */ 47 if (IS_MRST(dev)) 48 dev_priv->iLVDS_enable = fuse_value & FB_MIPI_DISABLE; 49 50 DRM_INFO("internal display is %s\n", 51 dev_priv->iLVDS_enable ? "LVDS display" : "MIPI display"); 52 53 /* Prevent runtime suspend at start*/ 54 if (dev_priv->iLVDS_enable) { 55 dev_priv->is_lvds_on = true; 56 dev_priv->is_mipi_on = false; 57 } else { 58 dev_priv->is_mipi_on = true; 59 dev_priv->is_lvds_on = false; 60 } 61 62 dev_priv->video_device_fuse = fuse_value; 63 64 pci_write_config_dword(pci_root, 0xD0, FB_REG09); 65 pci_read_config_dword(pci_root, 0xD4, &fuse_value); 66 67 dev_dbg(dev->dev, "SKU values is 0x%x.\n", fuse_value); 68 fuse_value_tmp = (fuse_value & FB_SKU_MASK) >> FB_SKU_SHIFT; 69 70 dev_priv->fuse_reg_value = fuse_value; 71 72 switch (fuse_value_tmp) { 73 case FB_SKU_100: 74 dev_priv->core_freq = 200; 75 break; 76 case FB_SKU_100L: 77 dev_priv->core_freq = 100; 78 break; 79 case FB_SKU_83: 80 dev_priv->core_freq = 166; 81 break; 82 default: 83 dev_warn(dev->dev, "Invalid SKU values, SKU value = 0x%08x\n", 84 fuse_value_tmp); 85 dev_priv->core_freq = 0; 86 } 87 dev_dbg(dev->dev, "LNC core clk is %dMHz.\n", dev_priv->core_freq); 88 pci_dev_put(pci_root); 89 } 90 91 /* 92 * Get the revison ID, B0:D2:F0;0x08 93 */ 94 static void mid_get_pci_revID(struct drm_psb_private *dev_priv) 95 { 96 uint32_t platform_rev_id = 0; 97 struct pci_dev *pdev = to_pci_dev(dev_priv->dev.dev); 98 int domain = pci_domain_nr(pdev->bus); 99 struct pci_dev *pci_gfx_root = 100 pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(2, 0)); 101 102 if (pci_gfx_root == NULL) { 103 WARN_ON(1); 104 return; 105 } 106 pci_read_config_dword(pci_gfx_root, 0x08, &platform_rev_id); 107 dev_priv->platform_rev_id = (uint8_t) platform_rev_id; 108 pci_dev_put(pci_gfx_root); 109 dev_dbg(dev_priv->dev.dev, "platform_rev_id is %x\n", dev_priv->platform_rev_id); 110 } 111 112 struct mid_vbt_header { 113 u32 signature; 114 u8 revision; 115 } __packed; 116 117 /* The same for r0 and r1 */ 118 struct vbt_r0 { 119 struct mid_vbt_header vbt_header; 120 u8 size; 121 u8 checksum; 122 } __packed; 123 124 struct vbt_r10 { 125 struct mid_vbt_header vbt_header; 126 u8 checksum; 127 u16 size; 128 u8 panel_count; 129 u8 primary_panel_idx; 130 u8 secondary_panel_idx; 131 u8 __reserved[5]; 132 } __packed; 133 134 static int read_vbt_r0(u32 addr, struct vbt_r0 *vbt) 135 { 136 void __iomem *vbt_virtual; 137 138 vbt_virtual = ioremap(addr, sizeof(*vbt)); 139 if (vbt_virtual == NULL) 140 return -1; 141 142 memcpy_fromio(vbt, vbt_virtual, sizeof(*vbt)); 143 iounmap(vbt_virtual); 144 145 return 0; 146 } 147 148 static int read_vbt_r10(u32 addr, struct vbt_r10 *vbt) 149 { 150 void __iomem *vbt_virtual; 151 152 vbt_virtual = ioremap(addr, sizeof(*vbt)); 153 if (!vbt_virtual) 154 return -1; 155 156 memcpy_fromio(vbt, vbt_virtual, sizeof(*vbt)); 157 iounmap(vbt_virtual); 158 159 return 0; 160 } 161 162 static int mid_get_vbt_data_r0(struct drm_psb_private *dev_priv, u32 addr) 163 { 164 struct vbt_r0 vbt; 165 void __iomem *gct_virtual; 166 struct gct_r0 gct; 167 u8 bpi; 168 169 if (read_vbt_r0(addr, &vbt)) 170 return -1; 171 172 gct_virtual = ioremap(addr + sizeof(vbt), vbt.size - sizeof(vbt)); 173 if (!gct_virtual) 174 return -1; 175 memcpy_fromio(&gct, gct_virtual, sizeof(gct)); 176 iounmap(gct_virtual); 177 178 bpi = gct.PD.BootPanelIndex; 179 dev_priv->gct_data.bpi = bpi; 180 dev_priv->gct_data.pt = gct.PD.PanelType; 181 dev_priv->gct_data.DTD = gct.panel[bpi].DTD; 182 dev_priv->gct_data.Panel_Port_Control = 183 gct.panel[bpi].Panel_Port_Control; 184 dev_priv->gct_data.Panel_MIPI_Display_Descriptor = 185 gct.panel[bpi].Panel_MIPI_Display_Descriptor; 186 187 return 0; 188 } 189 190 static int mid_get_vbt_data_r1(struct drm_psb_private *dev_priv, u32 addr) 191 { 192 struct vbt_r0 vbt; 193 void __iomem *gct_virtual; 194 struct gct_r1 gct; 195 u8 bpi; 196 197 if (read_vbt_r0(addr, &vbt)) 198 return -1; 199 200 gct_virtual = ioremap(addr + sizeof(vbt), vbt.size - sizeof(vbt)); 201 if (!gct_virtual) 202 return -1; 203 memcpy_fromio(&gct, gct_virtual, sizeof(gct)); 204 iounmap(gct_virtual); 205 206 bpi = gct.PD.BootPanelIndex; 207 dev_priv->gct_data.bpi = bpi; 208 dev_priv->gct_data.pt = gct.PD.PanelType; 209 dev_priv->gct_data.DTD = gct.panel[bpi].DTD; 210 dev_priv->gct_data.Panel_Port_Control = 211 gct.panel[bpi].Panel_Port_Control; 212 dev_priv->gct_data.Panel_MIPI_Display_Descriptor = 213 gct.panel[bpi].Panel_MIPI_Display_Descriptor; 214 215 return 0; 216 } 217 218 static int mid_get_vbt_data_r10(struct drm_psb_private *dev_priv, u32 addr) 219 { 220 struct vbt_r10 vbt; 221 void __iomem *gct_virtual; 222 struct gct_r10 *gct; 223 struct oaktrail_timing_info *dp_ti = &dev_priv->gct_data.DTD; 224 struct gct_r10_timing_info *ti; 225 int ret = -1; 226 227 if (read_vbt_r10(addr, &vbt)) 228 return -1; 229 230 gct = kmalloc_array(vbt.panel_count, sizeof(*gct), GFP_KERNEL); 231 if (!gct) 232 return -ENOMEM; 233 234 gct_virtual = ioremap(addr + sizeof(vbt), 235 sizeof(*gct) * vbt.panel_count); 236 if (!gct_virtual) 237 goto out; 238 memcpy_fromio(gct, gct_virtual, sizeof(*gct)); 239 iounmap(gct_virtual); 240 241 dev_priv->gct_data.bpi = vbt.primary_panel_idx; 242 dev_priv->gct_data.Panel_MIPI_Display_Descriptor = 243 gct[vbt.primary_panel_idx].Panel_MIPI_Display_Descriptor; 244 245 ti = &gct[vbt.primary_panel_idx].DTD; 246 dp_ti->pixel_clock = ti->pixel_clock; 247 dp_ti->hactive_hi = ti->hactive_hi; 248 dp_ti->hactive_lo = ti->hactive_lo; 249 dp_ti->hblank_hi = ti->hblank_hi; 250 dp_ti->hblank_lo = ti->hblank_lo; 251 dp_ti->hsync_offset_hi = ti->hsync_offset_hi; 252 dp_ti->hsync_offset_lo = ti->hsync_offset_lo; 253 dp_ti->hsync_pulse_width_hi = ti->hsync_pulse_width_hi; 254 dp_ti->hsync_pulse_width_lo = ti->hsync_pulse_width_lo; 255 dp_ti->vactive_hi = ti->vactive_hi; 256 dp_ti->vactive_lo = ti->vactive_lo; 257 dp_ti->vblank_hi = ti->vblank_hi; 258 dp_ti->vblank_lo = ti->vblank_lo; 259 dp_ti->vsync_offset_hi = ti->vsync_offset_hi; 260 dp_ti->vsync_offset_lo = ti->vsync_offset_lo; 261 dp_ti->vsync_pulse_width_hi = ti->vsync_pulse_width_hi; 262 dp_ti->vsync_pulse_width_lo = ti->vsync_pulse_width_lo; 263 264 ret = 0; 265 out: 266 kfree(gct); 267 return ret; 268 } 269 270 static void mid_get_vbt_data(struct drm_psb_private *dev_priv) 271 { 272 struct drm_device *dev = &dev_priv->dev; 273 struct pci_dev *pdev = to_pci_dev(dev->dev); 274 u32 addr; 275 u8 __iomem *vbt_virtual; 276 struct mid_vbt_header vbt_header; 277 struct pci_dev *pci_gfx_root = 278 pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus), 279 0, PCI_DEVFN(2, 0)); 280 int ret = -1; 281 282 /* Get the address of the platform config vbt */ 283 pci_read_config_dword(pci_gfx_root, 0xFC, &addr); 284 pci_dev_put(pci_gfx_root); 285 286 dev_dbg(dev->dev, "drm platform config address is %x\n", addr); 287 288 if (!addr) 289 goto out; 290 291 /* get the virtual address of the vbt */ 292 vbt_virtual = ioremap(addr, sizeof(vbt_header)); 293 if (!vbt_virtual) 294 goto out; 295 296 memcpy_fromio(&vbt_header, vbt_virtual, sizeof(vbt_header)); 297 iounmap(vbt_virtual); 298 299 if (memcmp(&vbt_header.signature, "$GCT", 4)) 300 goto out; 301 302 dev_dbg(dev->dev, "GCT revision is %02x\n", vbt_header.revision); 303 304 switch (vbt_header.revision) { 305 case 0x00: 306 ret = mid_get_vbt_data_r0(dev_priv, addr); 307 break; 308 case 0x01: 309 ret = mid_get_vbt_data_r1(dev_priv, addr); 310 break; 311 case 0x10: 312 ret = mid_get_vbt_data_r10(dev_priv, addr); 313 break; 314 default: 315 dev_err(dev->dev, "Unknown revision of GCT!\n"); 316 } 317 318 out: 319 if (ret) 320 dev_err(dev->dev, "Unable to read GCT!"); 321 else 322 dev_priv->has_gct = true; 323 } 324 325 int mid_chip_setup(struct drm_device *dev) 326 { 327 struct drm_psb_private *dev_priv = to_drm_psb_private(dev); 328 mid_get_fuse_settings(dev); 329 mid_get_vbt_data(dev_priv); 330 mid_get_pci_revID(dev_priv); 331 return 0; 332 } 333