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drm/nouveau/bios: add support for ccb 4.1 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2014-08-19 08:20:26 +10:00
parent dae2043976
commit c5a09c8116
2 changed files with 25 additions and 7 deletions
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13
drivers/gpu/drm/nouveau/core/include/subdev/bios/i2c.h
View File

@ -4,11 +4,14 @@
struct nouveau_bios;
enum dcb_i2c_type {
DCB_I2C_NV04_BIT = 0,
DCB_I2C_NV4E_BIT = 4,
DCB_I2C_NVIO_BIT = 5,
DCB_I2C_NVIO_AUX = 6,
DCB_I2C_UNUSED = 0xff
/* matches bios type field prior to ccb 4.1 */
DCB_I2C_NV04_BIT = 0x00,
DCB_I2C_NV4E_BIT = 0x04,
DCB_I2C_NVIO_BIT = 0x05,
DCB_I2C_NVIO_AUX = 0x06,
/* made up - mostly */
DCB_I2C_PMGR = 0x80,
DCB_I2C_UNUSED = 0xff
};
struct dcb_i2c_entry {

19
drivers/gpu/drm/nouveau/core/subdev/bios/i2c.c
View File

@ -39,7 +39,7 @@ dcb_i2c_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
i2c = nv_ro16(bios, dcb + 4);
}
if (i2c && *ver >= 0x41) {
if (i2c && *ver >= 0x42) {
nv_warn(bios, "ccb %02x not supported\n", *ver);
return 0x0000;
}
@ -75,6 +75,12 @@ dcb_i2c_parse(struct nouveau_bios *bios, u8 idx, struct dcb_i2c_entry *info)
u8 ver, len;
u16 ent = dcb_i2c_entry(bios, idx, &ver, &len);
if (ent) {
if (ver >= 0x41) {
if (!(nv_ro32(bios, ent) & 0x80000000))
info->type = DCB_I2C_UNUSED;
else
info->type = DCB_I2C_PMGR;
} else
if (ver >= 0x30) {
info->type = nv_ro08(bios, ent + 0x03);
} else {
@ -104,7 +110,16 @@ dcb_i2c_parse(struct nouveau_bios *bios, u8 idx, struct dcb_i2c_entry *info)
case DCB_I2C_NVIO_AUX:
info->auxch = nv_ro08(bios, ent + 0) & 0x0f;
if (nv_ro08(bios, ent + 1) & 0x01)
info->share = info->auxch;
info->share = info->auxch;
return 0;
case DCB_I2C_PMGR:
info->drive = (nv_ro16(bios, ent + 0) & 0x01f) >> 0;
if (info->drive == 0x1f)
info->drive = DCB_I2C_UNUSED;
info->auxch = (nv_ro16(bios, ent + 0) & 0x3e0) >> 5;
if (info->auxch == 0x1f)
info->auxch = DCB_I2C_UNUSED;
info->share = info->auxch;
return 0;
case DCB_I2C_UNUSED:
return 0;