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25 #include "core/device.h"
27 #include "subdev/bios.h"
28 #include "subdev/bios/dcb.h"
31 dcb_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
33 struct nouveau_device *device = nv_device(bios);
36 if (device->card_type > NV_04)
37 dcb = nv_ro16(bios, 0x36);
39 nv_warn(bios, "DCB table not found\n");
43 *ver = nv_ro08(bios, dcb);
46 nv_warn(bios, "DCB version 0x%02x unknown\n", *ver);
50 if (nv_ro32(bios, dcb + 6) == 0x4edcbdcb) {
51 *hdr = nv_ro08(bios, dcb + 1);
52 *cnt = nv_ro08(bios, dcb + 2);
53 *len = nv_ro08(bios, dcb + 3);
58 if (nv_ro32(bios, dcb + 4) == 0x4edcbdcb) {
59 u16 i2c = nv_ro16(bios, dcb + 2);
61 *cnt = (i2c - dcb) / 8;
67 if (!nv_memcmp(bios, dcb - 7, "DEV_REC", 7)) {
68 u16 i2c = nv_ro16(bios, dcb + 2);
70 *cnt = (i2c - dcb) / 10;
76 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but
77 * always has the same single (crt) entry, even when tv-out
78 * present, so the conclusion is this version cannot really
81 * v1.2 tables (some NV6/10, and NV15+) normally have the
82 * same 5 entries, which are not specific to the card and so
85 * v1.2 does have an I2C table that read_dcb_i2c_table can
86 * handle, but cards exist (nv11 in #14821) with a bad i2c
87 * table pointer, so use the indices parsed in
88 * parse_bmp_structure.
90 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful
92 nv_warn(bios, "DCB contains no useful data\n");
96 nv_warn(bios, "DCB header validation failed\n");
101 dcb_outp(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len)
104 u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len);
105 if (dcb && idx < cnt)
106 return dcb + hdr + (idx * *len);
111 dcb_outp_hasht(struct dcb_output *outp)
113 return (outp->extdev << 8) | (outp->location << 4) | outp->type;
117 dcb_outp_hashm(struct dcb_output *outp)
119 return (outp->heads << 8) | (outp->link << 6) | outp->or;
123 dcb_outp_parse(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len,
124 struct dcb_output *outp)
126 u16 dcb = dcb_outp(bios, idx, ver, len);
129 u32 conn = nv_ro32(bios, dcb + 0x00);
130 outp->or = (conn & 0x0f000000) >> 24;
131 outp->location = (conn & 0x00300000) >> 20;
132 outp->bus = (conn & 0x000f0000) >> 16;
133 outp->connector = (conn & 0x0000f000) >> 12;
134 outp->heads = (conn & 0x00000f00) >> 8;
135 outp->i2c_index = (conn & 0x000000f0) >> 4;
136 outp->type = (conn & 0x0000000f);
143 u32 conf = nv_ro32(bios, dcb + 0x04);
144 switch (outp->type) {
145 case DCB_OUTPUT_TMDS:
146 case DCB_OUTPUT_LVDS:
148 outp->link = (conf & 0x00000030) >> 4;
149 outp->sorconf.link = outp->link; /*XXX*/
151 if (outp->location != 0)
152 outp->extdev = (conf & 0x0000ff00) >> 8;
159 outp->hasht = dcb_outp_hasht(outp);
160 outp->hashm = dcb_outp_hashm(outp);
166 dcb_outp_match(struct nouveau_bios *bios, u16 type, u16 mask,
167 u8 *ver, u8 *len, struct dcb_output *outp)
170 while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) {
171 if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) {
172 if ((dcb_outp_hashm(outp) & mask) == mask)
180 dcb_outp_foreach(struct nouveau_bios *bios, void *data,
181 int (*exec)(struct nouveau_bios *, void *, int, u16))
187 while ((outp = dcb_outp(bios, ++idx, &ver, &len))) {
188 if (nv_ro32(bios, outp) == 0x00000000)
189 break; /* seen on an NV11 with DCB v1.5 */
190 if (nv_ro32(bios, outp) == 0xffffffff)
191 break; /* seen on an NV17 with DCB v2.0 */
193 if (nv_ro08(bios, outp) == DCB_OUTPUT_UNUSED)
195 if (nv_ro08(bios, outp) == DCB_OUTPUT_EOL)
198 ret = exec(bios, data, idx, outp);