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path: root/drivers/gpu/drm/nouveau/nouveau_dp.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_dp.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_dp.c325
1 files changed, 98 insertions, 227 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
index 9b93b703ceab..d996134b1b28 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dp.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -161,116 +161,6 @@ out:
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)
{
@@ -298,6 +188,7 @@ nouveau_dp_bios_data(struct drm_device *dev, struct dcb_entry *dcb, u8 **entry)
case 0x20:
case 0x21:
case 0x30:
+ case 0x40:
break;
default:
NV_ERROR(dev, "displayport table 0x%02x unknown\n", table[0]);
@@ -318,13 +209,10 @@ 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;
@@ -335,142 +223,58 @@ 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]);
- }
-
- nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
- }
+ /* 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);
- /* 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 == DP_TRAIN_PRE_EMPHASIS_9_5)
+ 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);
}
@@ -554,8 +358,60 @@ dp_link_train_eq(struct drm_device *dev, struct dp_state *dp)
return eq_done ? 0 : -1;
}
+static void
+dp_set_downspread(struct drm_device *dev, struct dp_state *dp, bool enable)
+{
+ u16 script = 0x0000;
+ 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]);
+ } else
+ if (table[0] == 0x40) {
+ if (enable) script = ROM16(entry[11]);
+ else script = ROM16(entry[13]);
+ }
+ }
+
+ nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
+}
+
+static void
+dp_link_train_init(struct drm_device *dev, struct dp_state *dp)
+{
+ u16 script = 0x0000;
+ u8 *entry, *table = nouveau_dp_bios_data(dev, dp->dcb, &entry);
+ if (table) {
+ if (table[0] >= 0x20 && table[0] <= 0x30)
+ script = ROM16(entry[6]);
+ else
+ if (table[0] == 0x40)
+ script = ROM16(entry[5]);
+ }
+
+ nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
+}
+
+static void
+dp_link_train_fini(struct drm_device *dev, struct dp_state *dp)
+{
+ u16 script = 0x0000;
+ u8 *entry, *table = nouveau_dp_bios_data(dev, dp->dcb, &entry);
+ if (table) {
+ if (table[0] >= 0x20 && table[0] <= 0x30)
+ script = ROM16(entry[8]);
+ else
+ if (table[0] == 0x40)
+ script = ROM16(entry[7]);
+ }
+
+ nouveau_bios_run_init_table(dev, script, dp->dcb, dp->crtc);
+}
+
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);
@@ -571,17 +427,15 @@ 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;
+ /* adjust required bandwidth for 8B/10B coding overhead */
+ datarate = (datarate / 8) * 10;
+
/* some sinks toggle hotplug in response to some of the actions
* we take during link training (DP_SET_POWER is one), we need
* to ignore them for the moment to avoid races.
@@ -589,16 +443,10 @@ nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate)
nouveau_gpio_irq(dev, 0, nv_connector->hpd, 0xff, false);
/* enable down-spreading, if possible */
- if (dp.table[1] >= 16) {
- u16 script = ROM16(dp.entry[14]);
- if (nv_encoder->dp.dpcd[3] & 1)
- script = ROM16(dp.entry[12]);
-
- nouveau_bios_run_init_table(dev, script, dp.dcb, dp.crtc);
- }
+ dp_set_downspread(dev, &dp, nv_encoder->dp.dpcd[3] & 1);
/* execute pre-train script from vbios */
- nouveau_bios_run_init_table(dev, ROM16(dp.entry[6]), dp.dcb, dp.crtc);
+ dp_link_train_init(dev, &dp);
/* start off at highest link rate supported by encoder and display */
while (*link_bw > nv_encoder->dp.link_bw)
@@ -632,13 +480,36 @@ nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate)
dp_set_training_pattern(dev, &dp, DP_TRAINING_PATTERN_DISABLE);
/* execute post-train script from vbios */
- nouveau_bios_run_init_table(dev, ROM16(dp.entry[8]), dp.dcb, dp.crtc);
+ dp_link_train_fini(dev, &dp);
/* re-enable hotplug detect */
nouveau_gpio_irq(dev, 0, nv_connector->hpd, 0xff, true);
return true;
}
+void
+nouveau_dp_dpms(struct drm_encoder *encoder, int mode, u32 datarate,
+ struct dp_train_func *func)
+{
+ struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
+ struct nouveau_i2c_chan *auxch;
+ u8 status;
+
+ auxch = nouveau_i2c_find(encoder->dev, nv_encoder->dcb->i2c_index);
+ if (!auxch)
+ return;
+
+ if (mode == DRM_MODE_DPMS_ON)
+ status = DP_SET_POWER_D0;
+ else
+ status = DP_SET_POWER_D3;
+
+ nouveau_dp_auxch(auxch, 8, DP_SET_POWER, &status, 1);
+
+ if (mode == DRM_MODE_DPMS_ON)
+ nouveau_dp_link_train(encoder, datarate, func);
+}
+
bool
nouveau_dp_detect(struct drm_encoder *encoder)
{
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