Skip to content

Commit

Permalink
drm/nvd0/disp: initial implementation of displayport
Browse files Browse the repository at this point in the history 
Signed-off-by: Ben Skeggs <[email protected]>
  • Loading branch information
Ben Skeggs committed Mar 13, 2012
1 parent f14d9a4 commit 6e83fda
Show file tree
Hide file tree
Showing 2 changed files with 171 additions and 4 deletions.
6 changes: 2 additions & 4 deletions drivers/gpu/drm/nouveau/nouveau_dp.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -364,10 +364,8 @@ dp_set_downspread(struct drm_device *dev, struct dp_state *dp, bool enable)
u8 *entry, *table = nouveau_dp_bios_data(dev, dp->dcb, &entry);
if (table) {
if (table[0] >= 0x20 && table[0] <= 0x30) {
if (enable)
script = ROM16(entry[12]);
else
script = ROM16(entry[14]);
if (enable) script = ROM16(entry[12]);
else script = ROM16(entry[14]);
}
}

Expand Down
169 changes: 169 additions & 0 deletions drivers/gpu/drm/nouveau/nvd0_display.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1183,6 +1183,143 @@ nvd0_hdmi_disconnect(struct drm_encoder *encoder)
/******************************************************************************
* SOR
*****************************************************************************/
static inline u32
nvd0_sor_dp_lane_map(struct drm_device *dev, struct dcb_entry *dcb, u8 lane)
{
static const u8 nvd0[] = { 16, 8, 0, 24 };
return nvd0[lane];
}

static void
nvd0_sor_dp_train_set(struct drm_device *dev, struct dcb_entry *dcb, u8 pattern)
{
const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
const u32 loff = (or * 0x800) + (link * 0x80);
nv_mask(dev, 0x61c110 + loff, 0x0f0f0f0f, 0x01010101 * pattern);
}

static void
nvd0_sor_dp_train_adj(struct drm_device *dev, struct dcb_entry *dcb,
u8 lane, u8 swing, u8 preem)
{
const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
const u32 loff = (or * 0x800) + (link * 0x80);
u32 shift = nvd0_sor_dp_lane_map(dev, dcb, lane);
u32 mask = 0x000000ff << shift;
u8 *table, *entry, *config = NULL;

switch (swing) {
case 0: preem += 0; break;
case 1: preem += 4; break;
case 2: preem += 7; break;
case 3: preem += 9; break;
}

table = nouveau_dp_bios_data(dev, dcb, &entry);
if (table) {
if (table[0] == 0x30) {
config = entry + table[4];
config += table[5] * preem;
}
}

if (!config) {
NV_ERROR(dev, "PDISP: unsupported DP table for chipset\n");
return;
}

nv_mask(dev, 0x61c118 + loff, mask, config[1] << shift);
nv_mask(dev, 0x61c120 + loff, mask, config[2] << shift);
nv_mask(dev, 0x61c130 + loff, 0x0000ff00, config[3] << 8);
nv_mask(dev, 0x61c13c + loff, 0x00000000, 0x00000000);
}

static void
nvd0_sor_dp_link_set(struct drm_device *dev, struct dcb_entry *dcb, int crtc,
int link_nr, u32 link_bw, bool enhframe)
{
const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
const u32 loff = (or * 0x800) + (link * 0x80);
const u32 soff = (or * 0x800);
u32 dpctrl = nv_rd32(dev, 0x61c10c + loff) & ~0x001f4000;
u32 clksor = nv_rd32(dev, 0x612300 + soff) & ~0x007c0000;
u32 script = 0x0000, lane_mask = 0;
u8 *table, *entry;
int i;

link_bw /= 27000;

table = nouveau_dp_bios_data(dev, dcb, &entry);
if (table) {
if (table[0] == 0x30) entry = ROMPTR(dev, entry[10]);
else entry = NULL;

while (entry) {
if (entry[0] >= link_bw)
break;
entry += 3;
}

nouveau_bios_run_init_table(dev, script, dcb, crtc);
}

clksor |= link_bw << 18;
dpctrl |= ((1 << link_nr) - 1) << 16;
if (enhframe)
dpctrl |= 0x00004000;

for (i = 0; i < link_nr; i++)
lane_mask |= 1 << (nvd0_sor_dp_lane_map(dev, dcb, i) >> 3);

nv_wr32(dev, 0x612300 + soff, clksor);
nv_wr32(dev, 0x61c10c + loff, dpctrl);
nv_mask(dev, 0x61c130 + loff, 0x0000000f, lane_mask);
}

static void
nvd0_sor_dp_link_get(struct drm_device *dev, struct dcb_entry *dcb,
u32 *link_nr, u32 *link_bw)
{
const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
const u32 loff = (or * 0x800) + (link * 0x80);
const u32 soff = (or * 0x800);
u32 dpctrl = nv_rd32(dev, 0x61c10c + loff) & 0x000f0000;
u32 clksor = nv_rd32(dev, 0x612300 + soff);

if (dpctrl > 0x00030000) *link_nr = 4;
else if (dpctrl > 0x00010000) *link_nr = 2;
else *link_nr = 1;

*link_bw = (clksor & 0x007c0000) >> 18;
*link_bw *= 27000;
}

static void
nvd0_sor_dp_calc_tu(struct drm_device *dev, struct dcb_entry *dcb,
u32 crtc, u32 datarate)
{
const u32 symbol = 100000;
const u32 TU = 64;
u32 link_nr, link_bw;
u64 ratio, value;

nvd0_sor_dp_link_get(dev, dcb, &link_nr, &link_bw);

ratio = datarate;
ratio *= symbol;
do_div(ratio, link_nr * link_bw);

value = (symbol - ratio) * TU;
value *= ratio;
do_div(value, symbol);
do_div(value, symbol);

value += 5;
value |= 0x08000000;

nv_wr32(dev, 0x616610 + (crtc * 0x800), value);
}

static void
nvd0_sor_dpms(struct drm_encoder *encoder, int mode)
{
Expand Down Expand Up @@ -1215,6 +1352,16 @@ nvd0_sor_dpms(struct drm_encoder *encoder, int mode)
nv_mask(dev, 0x61c004 + (or * 0x0800), 0x80000001, dpms_ctrl);
nv_wait(dev, 0x61c004 + (or * 0x0800), 0x80000000, 0x00000000);
nv_wait(dev, 0x61c030 + (or * 0x0800), 0x10000000, 0x00000000);

if (nv_encoder->dcb->type == OUTPUT_DP) {
struct dp_train_func func = {
.link_set = nvd0_sor_dp_link_set,
.train_set = nvd0_sor_dp_train_set,
.train_adj = nvd0_sor_dp_train_adj
};

nouveau_dp_dpms(encoder, mode, nv_encoder->dp.datarate, &func);
}
}

static bool
Expand Down Expand Up @@ -1306,13 +1453,31 @@ nvd0_sor_mode_set(struct drm_encoder *encoder, struct drm_display_mode *umode,

}
break;
case OUTPUT_DP:
if (nv_connector->base.display_info.bpc == 6)
nv_encoder->dp.datarate = mode->clock * 18 / 8;
else
nv_encoder->dp.datarate = mode->clock * 24 / 8;

if (nv_encoder->dcb->sorconf.link & 1)
mode_ctrl |= 0x00000800;
else
mode_ctrl |= 0x00000900;

or_config = (mode_ctrl & 0x00000f00) >> 8;
break;
default:
BUG_ON(1);
break;
}

nvd0_sor_dpms(encoder, DRM_MODE_DPMS_ON);

if (nv_encoder->dcb->type == OUTPUT_DP) {
nvd0_sor_dp_calc_tu(dev, nv_encoder->dcb, nv_crtc->index,
nv_encoder->dp.datarate);
}

push = evo_wait(dev, EVO_MASTER, 4);
if (push) {
evo_mthd(push, 0x0200 + (nv_encoder->or * 0x20), 2);
Expand Down Expand Up @@ -1413,6 +1578,8 @@ lookup_dcb(struct drm_device *dev, int id, u32 mc)
case 0x00000100: type = OUTPUT_TMDS; break;
case 0x00000200: type = OUTPUT_TMDS; break;
case 0x00000500: type = OUTPUT_TMDS; break;
case 0x00000800: type = OUTPUT_DP; break;
case 0x00000900: type = OUTPUT_DP; break;
default:
NV_ERROR(dev, "PDISP: unknown SOR mc 0x%08x\n", mc);
return NULL;
Expand Down Expand Up @@ -1498,6 +1665,7 @@ nvd0_display_unk2_handler(struct drm_device *dev, u32 crtc, u32 mask)
break;
case OUTPUT_TMDS:
case OUTPUT_LVDS:
case OUTPUT_DP:
if (cfg & 0x00000100)
tmp = 0x00000101;
else
Expand Down Expand Up @@ -1798,6 +1966,7 @@ nvd0_display_create(struct drm_device *dev)
switch (dcbe->type) {
case OUTPUT_TMDS:
case OUTPUT_LVDS:
case OUTPUT_DP:
nvd0_sor_create(connector, dcbe);
break;
case OUTPUT_ANALOG:
Expand Down

0 comments on commit 6e83fda

Please sign in to comment.