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drm/nouveau/dp: add support for displayport table 0x30

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Written from observations of my NVD9's vbios, completely untested due to
my NVD9 lacking actual DisplayPort connectors..

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-08-05 14:47:28 +10:00
parent 5f1800bd8a
commit c16a3a358b
1 changed files with 48 additions and 22 deletions
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70
drivers/gpu/drm/nouveau/nouveau_dp.c
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@ -298,6 +298,7 @@ nouveau_dp_bios_data(struct drm_device *dev, struct dcb_entry *dcb, u8 **entry)
switch (table[0]) {
case 0x20:
case 0x21:
case 0x30:
break;
default:
NV_ERROR(dev, "displayport table 0x%02x unknown\n", table[0]);
@ -339,6 +340,7 @@ dp_set_link_config(struct drm_device *dev, struct dp_state *dp)
int or = dp->or, link = dp->link;
u8 *entry, sink[2];
u32 dp_ctrl;
u16 script;
NV_DEBUG_KMS(dev, "%d lanes at %d KB/s\n", dp->link_nr, dp->link_bw);
@ -360,10 +362,17 @@ dp_set_link_config(struct drm_device *dev, struct dp_state *dp)
*/
entry = ROMPTR(&dev_priv->vbios, dp->entry[10]);
if (entry) {
while (dp->link_bw < (ROM16(entry[0]) * 10))
entry += 4;
if (dp->table[0] < 0x30) {
while (dp->link_bw < (ROM16(entry[0]) * 10))
entry += 4;
script = ROM16(entry[2]);
} else {
while (dp->link_bw < (entry[0] * 27000))
entry += 3;
script = ROM16(entry[1]);
}
nouveau_bios_run_init_table(dev, ROM16(entry[2]), dp->dcb, dp->crtc);
nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
}
/* configure lane count on the source */
@ -414,33 +423,50 @@ dp_link_train_commit(struct drm_device *dev, struct dp_state *dp)
shifts = nvaf_lane_map;
for (i = 0; i < dp->link_nr; i++) {
u8 lane = (dp->stat[4 + (i >> 1)] >> ((i & 1) * 4)) & 0xf;
u8 *conf = dp->entry + dp->table[4];
u8 *last = conf + (dp->entry[4] * dp->table[5]);
u8 lane = (dp->stat[4 + (i >> 1)] >> ((i & 1) * 4)) & 0xf;
u8 lpre = (lane & 0x0c) >> 2;
u8 lvsw = (lane & 0x03) >> 0;
while (conf < last) {
if ((lane & 3) == conf[0] &&
(lane >> 2) == conf[1])
break;
conf += 5;
}
mask |= 0xff << shifts[i];
unk |= 1 << (shifts[i] >> 3);
if (conf == last)
return -EINVAL;
dp->conf[i] = (conf[1] << 3) | conf[0];
if (conf[0] == DP_TRAIN_VOLTAGE_SWING_1200)
dp->conf[i] = (lpre << 3) | lvsw;
if (lvsw == DP_TRAIN_VOLTAGE_SWING_1200)
dp->conf[i] |= DP_TRAIN_MAX_SWING_REACHED;
if (conf[1] == DP_TRAIN_PRE_EMPHASIS_9_5)
if (lpre == DP_TRAIN_PRE_EMPHASIS_9_5)
dp->conf[i] |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
NV_DEBUG_KMS(dev, "config lane %d %02x\n", i, dp->conf[i]);
mask |= 0xff << shifts[i];
drv |= conf[2] << shifts[i];
pre |= conf[3] << shifts[i];
unk = (unk & ~0x0000ff00) | (conf[4] << 8);
unk |= 1 << (shifts[i] >> 3);
if (dp->table[0] < 0x30) {
u8 *last = conf + (dp->entry[4] * dp->table[5]);
while (lvsw != conf[0] || lpre != conf[1]) {
conf += dp->table[5];
if (conf >= last)
return -EINVAL;
}
conf += 2;
} else {
/* no lookup table anymore, set entries for each
* combination of voltage swing and pre-emphasis
* level allowed by the DP spec.
*/
switch (lvsw) {
case 0: lpre += 0; break;
case 1: lpre += 4; break;
case 2: lpre += 7; break;
case 3: lpre += 9; break;
}
conf = conf + (lpre * dp->table[5]);
conf++;
}
drv |= conf[0] << shifts[i];
pre |= conf[1] << shifts[i];
unk = (unk & ~0x0000ff00) | (conf[2] << 8);
}
nv_mask(dev, NV50_SOR_DP_UNK118(or, link), mask, drv);