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drm/nouveau/dp: move all nv50/sor-specific code out of nouveau_dp.c
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Off-chip encoders (which we don't support yet anyway), and newer chipsets
(such as NVD9...), will need their own code for this.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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Ben Skeggs committed Mar 13, 2012
1 parent 8c1dcb6 commit 8663bc7
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Showing 5 changed files with 231 additions and 228 deletions.
233 changes: 16 additions & 217 deletions drivers/gpu/drm/nouveau/nouveau_dp.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -161,116 +161,6 @@ auxch_tx(struct drm_device *dev, int ch, u8 type, u32 addr, u8 *data, u8 size)
return ret;
}

static u32
dp_link_bw_get(struct drm_device *dev, int or, int link)
{
u32 ctrl = nv_rd32(dev, 0x614300 + (or * 0x800));
if (!(ctrl & 0x000c0000))
return 162000;
return 270000;
}

static int
dp_lane_count_get(struct drm_device *dev, int or, int link)
{
u32 ctrl = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link));
switch (ctrl & 0x000f0000) {
case 0x00010000: return 1;
case 0x00030000: return 2;
default:
return 4;
}
}

void
nouveau_dp_tu_update(struct drm_device *dev, int or, int link, u32 clk, u32 bpp)
{
const u32 symbol = 100000;
int bestTU = 0, bestVTUi = 0, bestVTUf = 0, bestVTUa = 0;
int TU, VTUi, VTUf, VTUa;
u64 link_data_rate, link_ratio, unk;
u32 best_diff = 64 * symbol;
u32 link_nr, link_bw, r;

/* calculate packed data rate for each lane */
link_nr = dp_lane_count_get(dev, or, link);
link_data_rate = (clk * bpp / 8) / link_nr;

/* calculate ratio of packed data rate to link symbol rate */
link_bw = dp_link_bw_get(dev, or, link);
link_ratio = link_data_rate * symbol;
r = do_div(link_ratio, link_bw);

for (TU = 64; TU >= 32; TU--) {
/* calculate average number of valid symbols in each TU */
u32 tu_valid = link_ratio * TU;
u32 calc, diff;

/* find a hw representation for the fraction.. */
VTUi = tu_valid / symbol;
calc = VTUi * symbol;
diff = tu_valid - calc;
if (diff) {
if (diff >= (symbol / 2)) {
VTUf = symbol / (symbol - diff);
if (symbol - (VTUf * diff))
VTUf++;

if (VTUf <= 15) {
VTUa = 1;
calc += symbol - (symbol / VTUf);
} else {
VTUa = 0;
VTUf = 1;
calc += symbol;
}
} else {
VTUa = 0;
VTUf = min((int)(symbol / diff), 15);
calc += symbol / VTUf;
}

diff = calc - tu_valid;
} else {
/* no remainder, but the hw doesn't like the fractional
* part to be zero. decrement the integer part and
* have the fraction add a whole symbol back
*/
VTUa = 0;
VTUf = 1;
VTUi--;
}

if (diff < best_diff) {
best_diff = diff;
bestTU = TU;
bestVTUa = VTUa;
bestVTUf = VTUf;
bestVTUi = VTUi;
if (diff == 0)
break;
}
}

if (!bestTU) {
NV_ERROR(dev, "DP: unable to find suitable config\n");
return;
}

/* XXX close to vbios numbers, but not right */
unk = (symbol - link_ratio) * bestTU;
unk *= link_ratio;
r = do_div(unk, symbol);
r = do_div(unk, symbol);
unk += 6;

nv_mask(dev, NV50_SOR_DP_CTRL(or, link), 0x000001fc, bestTU << 2);
nv_mask(dev, NV50_SOR_DP_SCFG(or, link), 0x010f7f3f, bestVTUa << 24 |
bestVTUf << 16 |
bestVTUi << 8 |
unk);
}

u8 *
nouveau_dp_bios_data(struct drm_device *dev, struct dcb_entry *dcb, u8 **entry)
{
Expand Down Expand Up @@ -318,13 +208,10 @@ nouveau_dp_bios_data(struct drm_device *dev, struct dcb_entry *dcb, u8 **entry)
* link training
*****************************************************************************/
struct dp_state {
struct dp_train_func *func;
struct dcb_entry *dcb;
u8 *table;
u8 *entry;
int auxch;
int crtc;
int or;
int link;
u8 *dpcd;
int link_nr;
u32 link_bw;
Expand All @@ -335,142 +222,58 @@ struct dp_state {
static void
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;
u8 sink[2];

NV_DEBUG_KMS(dev, "%d lanes at %d KB/s\n", dp->link_nr, dp->link_bw);

/* set selected link rate on source */
switch (dp->link_bw) {
case 270000:
nv_mask(dev, 0x614300 + (or * 0x800), 0x000c0000, 0x00040000);
sink[0] = DP_LINK_BW_2_7;
break;
default:
nv_mask(dev, 0x614300 + (or * 0x800), 0x000c0000, 0x00000000);
sink[0] = DP_LINK_BW_1_62;
break;
}

/* offset +0x0a of each dp encoder table entry is a pointer to another
* table, that has (among other things) pointers to more scripts that
* need to be executed, this time depending on link speed.
*/
entry = ROMPTR(dev, dp->entry[10]);
if (entry) {
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]);
}
/* set desired link configuration on the source */
dp->func->link_set(dev, dp->dcb, dp->crtc, dp->link_nr, dp->link_bw,
dp->dpcd[2] & DP_ENHANCED_FRAME_CAP);

nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
}

/* configure lane count on the source */
dp_ctrl = ((1 << dp->link_nr) - 1) << 16;
/* inform the sink of the new configuration */
sink[0] = dp->link_bw / 27000;
sink[1] = dp->link_nr;
if (dp->dpcd[2] & DP_ENHANCED_FRAME_CAP) {
dp_ctrl |= 0x00004000;
if (dp->dpcd[2] & DP_ENHANCED_FRAME_CAP)
sink[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
}

nv_mask(dev, NV50_SOR_DP_CTRL(or, link), 0x001f4000, dp_ctrl);

/* inform the sink of the new configuration */
auxch_tx(dev, dp->auxch, 8, DP_LINK_BW_SET, sink, 2);
}

static void
dp_set_training_pattern(struct drm_device *dev, struct dp_state *dp, u8 tp)
dp_set_training_pattern(struct drm_device *dev, struct dp_state *dp, u8 pattern)
{
u8 sink_tp;

NV_DEBUG_KMS(dev, "training pattern %d\n", tp);
NV_DEBUG_KMS(dev, "training pattern %d\n", pattern);

nv_mask(dev, NV50_SOR_DP_CTRL(dp->or, dp->link), 0x0f000000, tp << 24);
dp->func->train_set(dev, dp->dcb, pattern);

auxch_tx(dev, dp->auxch, 9, DP_TRAINING_PATTERN_SET, &sink_tp, 1);
sink_tp &= ~DP_TRAINING_PATTERN_MASK;
sink_tp |= tp;
sink_tp |= pattern;
auxch_tx(dev, dp->auxch, 8, DP_TRAINING_PATTERN_SET, &sink_tp, 1);
}

static const u8 nv50_lane_map[] = { 16, 8, 0, 24 };
static const u8 nvaf_lane_map[] = { 24, 16, 8, 0 };

static int
dp_link_train_commit(struct drm_device *dev, struct dp_state *dp)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
u32 mask = 0, drv = 0, pre = 0, unk = 0;
const u8 *shifts;
int link = dp->link;
int or = dp->or;
int i;

if (dev_priv->chipset != 0xaf)
shifts = nv50_lane_map;
else
shifts = nvaf_lane_map;

for (i = 0; i < dp->link_nr; i++) {
u8 *conf = dp->entry + dp->table[4];
u8 lane = (dp->stat[4 + (i >> 1)] >> ((i & 1) * 4)) & 0xf;
u8 lpre = (lane & 0x0c) >> 2;
u8 lvsw = (lane & 0x03) >> 0;

mask |= 0xff << shifts[i];
unk |= 1 << (shifts[i] >> 3);

dp->conf[i] = (lpre << 3) | lvsw;
if (lvsw == DP_TRAIN_VOLTAGE_SWING_1200)
dp->conf[i] |= DP_TRAIN_MAX_SWING_REACHED;
if ((lpre << 3) == 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]);

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);
dp->func->train_adj(dev, dp->dcb, i, lvsw, lpre);
}

nv_mask(dev, NV50_SOR_DP_UNK118(or, link), mask, drv);
nv_mask(dev, NV50_SOR_DP_UNK120(or, link), mask, pre);
nv_mask(dev, NV50_SOR_DP_UNK130(or, link), 0x0000ff0f, unk);

return auxch_tx(dev, dp->auxch, 8, DP_TRAINING_LANE0_SET, dp->conf, 4);
}

Expand Down Expand Up @@ -598,7 +401,8 @@ dp_link_train_fini(struct drm_device *dev, struct dp_state *dp)
}

bool
nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate)
nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate,
struct dp_train_func *func)
{
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
Expand All @@ -614,15 +418,10 @@ nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate)
if (!auxch)
return false;

dp.table = nouveau_dp_bios_data(dev, nv_encoder->dcb, &dp.entry);
if (!dp.table)
return -EINVAL;

dp.func = func;
dp.dcb = nv_encoder->dcb;
dp.crtc = nv_crtc->index;
dp.auxch = auxch->drive;
dp.or = nv_encoder->or;
dp.link = !(nv_encoder->dcb->sorconf.link & 1);
dp.dpcd = nv_encoder->dp.dpcd;

/* some sinks toggle hotplug in response to some of the actions
Expand Down
8 changes: 0 additions & 8 deletions drivers/gpu/drm/nouveau/nouveau_drv.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1162,14 +1162,6 @@ int nouveau_ttm_mmap(struct file *, struct vm_area_struct *);
/* nouveau_hdmi.c */
void nouveau_hdmi_mode_set(struct drm_encoder *, struct drm_display_mode *);

/* nouveau_dp.c */
int nouveau_dp_auxch(struct nouveau_i2c_chan *auxch, int cmd, int addr,
uint8_t *data, int data_nr);
bool nouveau_dp_detect(struct drm_encoder *);
bool nouveau_dp_link_train(struct drm_encoder *, u32 datarate);
void nouveau_dp_tu_update(struct drm_device *, int, int, u32, u32);
u8 *nouveau_dp_bios_data(struct drm_device *, struct dcb_entry *, u8 **);

/* nv04_fb.c */
extern int nv04_fb_vram_init(struct drm_device *);
extern int nv04_fb_init(struct drm_device *);
Expand Down
18 changes: 18 additions & 0 deletions drivers/gpu/drm/nouveau/nouveau_encoder.h
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,14 @@

#define NV_DPMS_CLEARED 0x80

struct dp_train_func {
void (*link_set)(struct drm_device *, struct dcb_entry *, int crtc,
int nr, u32 bw, bool enhframe);
void (*train_set)(struct drm_device *, struct dcb_entry *, u8 pattern);
void (*train_adj)(struct drm_device *, struct dcb_entry *,
u8 lane, u8 swing, u8 preem);
};

struct nouveau_encoder {
struct drm_encoder_slave base;

Expand Down Expand Up @@ -78,9 +86,19 @@ get_slave_funcs(struct drm_encoder *enc)
return to_encoder_slave(enc)->slave_funcs;
}

/* nouveau_dp.c */
int nouveau_dp_auxch(struct nouveau_i2c_chan *auxch, int cmd, int addr,
uint8_t *data, int data_nr);
bool nouveau_dp_detect(struct drm_encoder *);
bool nouveau_dp_link_train(struct drm_encoder *, u32 datarate,
struct dp_train_func *);
u8 *nouveau_dp_bios_data(struct drm_device *, struct dcb_entry *, u8 **);

struct nouveau_connector *
nouveau_encoder_connector_get(struct nouveau_encoder *encoder);
int nv50_sor_create(struct drm_connector *, struct dcb_entry *);
void nv50_sor_dp_calc_tu(struct drm_device *, int, int, u32, u32);
int nv50_dac_create(struct drm_connector *, struct dcb_entry *);


#endif /* __NOUVEAU_ENCODER_H__ */
4 changes: 2 additions & 2 deletions drivers/gpu/drm/nouveau/nv50_display.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -863,9 +863,9 @@ nv50_display_unk20_handler(struct drm_device *dev)
if (type == OUTPUT_DP) {
int link = !(dcb->dpconf.sor.link & 1);
if ((mc & 0x000f0000) == 0x00020000)
nouveau_dp_tu_update(dev, or, link, pclk, 18);
nv50_sor_dp_calc_tu(dev, or, link, pclk, 18);
else
nouveau_dp_tu_update(dev, or, link, pclk, 24);
nv50_sor_dp_calc_tu(dev, or, link, pclk, 24);
}

if (dcb->type != OUTPUT_ANALOG) {
Expand Down
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