#include "nouveau_i2c.h"
#include "nouveau_connector.h"
#include "nouveau_encoder.h"
+#include "nouveau_crtc.h"
/******************************************************************************
* aux channel util functions
return ret;
}
-static int
-auxch_rd(struct drm_encoder *encoder, int address, uint8_t *buf, int size)
-{
- struct drm_device *dev = encoder->dev;
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct nouveau_i2c_chan *auxch;
- int ret;
-
- auxch = nouveau_i2c_find(dev, nv_encoder->dcb->i2c_index);
- if (!auxch)
- return -ENODEV;
-
- ret = nouveau_dp_auxch(auxch, 9, address, buf, size);
- if (ret)
- return ret;
-
- return 0;
-}
-
-static int
-auxch_wr(struct drm_encoder *encoder, int address, uint8_t *buf, int size)
-{
- struct drm_device *dev = encoder->dev;
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct nouveau_i2c_chan *auxch;
- int ret;
-
- auxch = nouveau_i2c_find(dev, nv_encoder->dcb->i2c_index);
- if (!auxch)
- return -ENODEV;
-
- ret = nouveau_dp_auxch(auxch, 8, address, buf, size);
- return ret;
-}
-
static u32
dp_link_bw_get(struct drm_device *dev, int or, int link)
{
unk);
}
-static int
-nouveau_dp_lane_count_set(struct drm_encoder *encoder, uint8_t cmd)
-{
- struct drm_device *dev = encoder->dev;
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- uint32_t tmp;
- int or = nv_encoder->or, link = !(nv_encoder->dcb->sorconf.link & 1);
-
- tmp = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link));
- tmp &= ~(NV50_SOR_DP_CTRL_ENHANCED_FRAME_ENABLED |
- NV50_SOR_DP_CTRL_LANE_MASK);
- tmp |= ((1 << (cmd & DP_LANE_COUNT_MASK)) - 1) << 16;
- if (cmd & DP_LANE_COUNT_ENHANCED_FRAME_EN)
- tmp |= NV50_SOR_DP_CTRL_ENHANCED_FRAME_ENABLED;
- nv_wr32(dev, NV50_SOR_DP_CTRL(or, link), tmp);
-
- return auxch_wr(encoder, DP_LANE_COUNT_SET, &cmd, 1);
-}
-
-static int
-nouveau_dp_link_bw_set(struct drm_encoder *encoder, uint8_t cmd)
-{
- struct drm_device *dev = encoder->dev;
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- uint32_t tmp;
- int reg = 0x614300 + (nv_encoder->or * 0x800);
-
- tmp = nv_rd32(dev, reg);
- tmp &= 0xfff3ffff;
- if (cmd == DP_LINK_BW_2_7)
- tmp |= 0x00040000;
- nv_wr32(dev, reg, tmp);
-
- return auxch_wr(encoder, DP_LINK_BW_SET, &cmd, 1);
-}
-
-static int
-nouveau_dp_link_train_set(struct drm_encoder *encoder, int pattern)
-{
- struct drm_device *dev = encoder->dev;
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- uint32_t tmp;
- uint8_t cmd;
- int or = nv_encoder->or, link = !(nv_encoder->dcb->sorconf.link & 1);
- int ret;
-
- tmp = nv_rd32(dev, NV50_SOR_DP_CTRL(or, link));
- tmp &= ~NV50_SOR_DP_CTRL_TRAINING_PATTERN;
- tmp |= (pattern << 24);
- nv_wr32(dev, NV50_SOR_DP_CTRL(or, link), tmp);
-
- ret = auxch_rd(encoder, DP_TRAINING_PATTERN_SET, &cmd, 1);
- if (ret)
- return ret;
- cmd &= ~DP_TRAINING_PATTERN_MASK;
- cmd |= (pattern & DP_TRAINING_PATTERN_MASK);
- return auxch_wr(encoder, DP_TRAINING_PATTERN_SET, &cmd, 1);
-}
-
-static int
-nouveau_dp_max_voltage_swing(struct drm_encoder *encoder)
+u8 *
+nouveau_dp_bios_data(struct drm_device *dev, struct dcb_entry *dcb, u8 **entry)
{
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct drm_device *dev = encoder->dev;
- struct bit_displayport_encoder_table_entry *dpse;
- struct bit_displayport_encoder_table *dpe;
- int i, dpe_headerlen, max_vs = 0;
-
- dpe = nouveau_bios_dp_table(dev, nv_encoder->dcb, &dpe_headerlen);
- if (!dpe)
- return false;
- dpse = (void *)((char *)dpe + dpe_headerlen);
-
- for (i = 0; i < dpe_headerlen; i++, dpse++) {
- if (dpse->vs_level > max_vs)
- max_vs = dpse->vs_level;
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nvbios *bios = &dev_priv->vbios;
+ struct bit_entry d;
+ u8 *table;
+ int i;
+
+ if (bit_table(dev, 'd', &d)) {
+ NV_ERROR(dev, "BIT 'd' table not found\n");
+ return NULL;
}
- return max_vs;
-}
-
-static int
-nouveau_dp_max_pre_emphasis(struct drm_encoder *encoder, int vs)
-{
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct drm_device *dev = encoder->dev;
- struct bit_displayport_encoder_table_entry *dpse;
- struct bit_displayport_encoder_table *dpe;
- int i, dpe_headerlen, max_pre = 0;
+ if (d.version != 1) {
+ NV_ERROR(dev, "BIT 'd' table version %d unknown\n", d.version);
+ return NULL;
+ }
- dpe = nouveau_bios_dp_table(dev, nv_encoder->dcb, &dpe_headerlen);
- if (!dpe)
- return false;
- dpse = (void *)((char *)dpe + dpe_headerlen);
+ table = ROMPTR(bios, d.data[0]);
+ if (!table) {
+ NV_ERROR(dev, "displayport table pointer invalid\n");
+ return NULL;
+ }
- for (i = 0; i < dpe_headerlen; i++, dpse++) {
- if (dpse->vs_level != vs)
- continue;
+ switch (table[0]) {
+ case 0x20:
+ case 0x21:
+ case 0x30:
+ break;
+ default:
+ NV_ERROR(dev, "displayport table 0x%02x unknown\n", table[0]);
+ return NULL;
+ }
- if (dpse->pre_level > max_pre)
- max_pre = dpse->pre_level;
+ for (i = 0; i < table[3]; i++) {
+ *entry = ROMPTR(bios, table[table[1] + (i * table[2])]);
+ if (*entry && bios_encoder_match(dcb, ROM32((*entry)[0])))
+ return table;
}
- return max_pre;
+ NV_ERROR(dev, "displayport encoder table not found\n");
+ return NULL;
}
-static bool
-nouveau_dp_link_train_adjust(struct drm_encoder *encoder, uint8_t *config)
-{
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct drm_device *dev = encoder->dev;
- struct bit_displayport_encoder_table *dpe;
- int ret, i, dpe_headerlen, vs = 0, pre = 0;
- uint8_t request[2];
-
- dpe = nouveau_bios_dp_table(dev, nv_encoder->dcb, &dpe_headerlen);
- if (!dpe)
- return false;
-
- ret = auxch_rd(encoder, DP_ADJUST_REQUEST_LANE0_1, request, 2);
- if (ret)
- return false;
-
- NV_DEBUG_KMS(dev, "\t\tadjust 0x%02x 0x%02x\n", request[0], request[1]);
-
- /* Keep all lanes at the same level.. */
- for (i = 0; i < nv_encoder->dp.link_nr; i++) {
- int lane_req = (request[i >> 1] >> ((i & 1) << 2)) & 0xf;
- int lane_vs = lane_req & 3;
- int lane_pre = (lane_req >> 2) & 3;
+/******************************************************************************
+ * link training
+ *****************************************************************************/
+struct dp_state {
+ struct dcb_entry *dcb;
+ u8 *table;
+ u8 *entry;
+ int auxch;
+ int crtc;
+ int or;
+ int link;
+ u8 *dpcd;
+ int link_nr;
+ u32 link_bw;
+ u8 stat[6];
+ u8 conf[4];
+};
- if (lane_vs > vs)
- vs = lane_vs;
- if (lane_pre > pre)
- pre = lane_pre;
+static void
+dp_set_link_config(struct drm_device *dev, struct dp_state *dp)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ 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);
+
+ /* 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;
}
- if (vs >= nouveau_dp_max_voltage_swing(encoder)) {
- vs = nouveau_dp_max_voltage_swing(encoder);
- vs |= 4;
+ /* 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_priv->vbios, 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);
}
- if (pre >= nouveau_dp_max_pre_emphasis(encoder, vs & 3)) {
- pre = nouveau_dp_max_pre_emphasis(encoder, vs & 3);
- pre |= 4;
+ /* configure lane count on the source */
+ dp_ctrl = ((1 << dp->link_nr) - 1) << 16;
+ sink[1] = dp->link_nr;
+ if (dp->dpcd[2] & DP_ENHANCED_FRAME_CAP) {
+ dp_ctrl |= 0x00004000;
+ sink[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
}
- /* Update the configuration for all lanes.. */
- for (i = 0; i < nv_encoder->dp.link_nr; i++)
- config[i] = (pre << 3) | vs;
+ nv_mask(dev, NV50_SOR_DP_CTRL(or, link), 0x001f4000, dp_ctrl);
- return true;
+ /* inform the sink of the new configuration */
+ auxch_tx(dev, dp->auxch, 8, DP_LINK_BW_SET, sink, 2);
}
-static bool
-nouveau_dp_link_train_commit(struct drm_encoder *encoder, uint8_t *config)
+static void
+dp_set_training_pattern(struct drm_device *dev, struct dp_state *dp, u8 tp)
{
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct drm_device *dev = encoder->dev;
- struct bit_displayport_encoder_table_entry *dpse;
- struct bit_displayport_encoder_table *dpe;
- int or = nv_encoder->or, link = !(nv_encoder->dcb->sorconf.link & 1);
- int dpe_headerlen, ret, i;
+ u8 sink_tp;
- NV_DEBUG_KMS(dev, "\t\tconfig 0x%02x 0x%02x 0x%02x 0x%02x\n",
- config[0], config[1], config[2], config[3]);
+ NV_DEBUG_KMS(dev, "training pattern %d\n", tp);
- dpe = nouveau_bios_dp_table(dev, nv_encoder->dcb, &dpe_headerlen);
- if (!dpe)
- return false;
- dpse = (void *)((char *)dpe + dpe_headerlen);
+ nv_mask(dev, NV50_SOR_DP_CTRL(dp->or, dp->link), 0x0f000000, tp << 24);
- for (i = 0; i < dpe->record_nr; i++, dpse++) {
- if (dpse->vs_level == (config[0] & 3) &&
- dpse->pre_level == ((config[0] >> 3) & 3))
- break;
- }
- BUG_ON(i == dpe->record_nr);
-
- for (i = 0; i < nv_encoder->dp.link_nr; i++) {
- const int shift[4] = { 16, 8, 0, 24 };
- uint32_t mask = 0xff << shift[i];
- uint32_t reg0, reg1, reg2;
-
- reg0 = nv_rd32(dev, NV50_SOR_DP_UNK118(or, link)) & ~mask;
- reg0 |= (dpse->reg0 << shift[i]);
- reg1 = nv_rd32(dev, NV50_SOR_DP_UNK120(or, link)) & ~mask;
- reg1 |= (dpse->reg1 << shift[i]);
- reg2 = nv_rd32(dev, NV50_SOR_DP_UNK130(or, link)) & 0xffff00ff;
- reg2 |= (dpse->reg2 << 8);
- nv_wr32(dev, NV50_SOR_DP_UNK118(or, link), reg0);
- nv_wr32(dev, NV50_SOR_DP_UNK120(or, link), reg1);
- nv_wr32(dev, NV50_SOR_DP_UNK130(or, link), reg2);
- }
-
- ret = auxch_wr(encoder, DP_TRAINING_LANE0_SET, config, 4);
- if (ret)
- return false;
-
- return true;
+ auxch_tx(dev, dp->auxch, 9, DP_TRAINING_PATTERN_SET, &sink_tp, 1);
+ sink_tp &= ~DP_TRAINING_PATTERN_MASK;
+ sink_tp |= tp;
+ auxch_tx(dev, dp->auxch, 8, DP_TRAINING_PATTERN_SET, &sink_tp, 1);
}
-bool
-nouveau_dp_link_train(struct drm_encoder *encoder)
+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_device *dev = encoder->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct nouveau_connector *nv_connector;
- struct bit_displayport_encoder_table *dpe;
- int dpe_headerlen;
- uint8_t config[4], status[3];
- bool cr_done, cr_max_vs, eq_done, hpd_state;
- int ret = 0, i, tries, voltage;
-
- NV_DEBUG_KMS(dev, "link training!!\n");
-
- nv_connector = nouveau_encoder_connector_get(nv_encoder);
- if (!nv_connector)
- return false;
+ 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)
+ 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;
+ }
- dpe = nouveau_bios_dp_table(dev, nv_encoder->dcb, &dpe_headerlen);
- if (!dpe) {
- NV_ERROR(dev, "SOR-%d: no DP encoder table!\n", nv_encoder->or);
- return false;
- }
+ 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;
+ }
- /* disable hotplug detect, this flips around on some panels during
- * link training.
- */
- hpd_state = pgpio->irq_enable(dev, nv_connector->dcb->gpio_tag, false);
+ conf = conf + (lpre * dp->table[5]);
+ conf++;
+ }
- if (dpe->script0) {
- NV_DEBUG_KMS(dev, "SOR-%d: running DP script 0\n", nv_encoder->or);
- nouveau_bios_run_init_table(dev, le16_to_cpu(dpe->script0),
- nv_encoder->dcb, -1);
+ drv |= conf[0] << shifts[i];
+ pre |= conf[1] << shifts[i];
+ unk = (unk & ~0x0000ff00) | (conf[2] << 8);
}
-train:
- cr_done = eq_done = false;
+ 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);
- /* set link configuration */
- NV_DEBUG_KMS(dev, "\tbegin train: bw %d, lanes %d\n",
- nv_encoder->dp.link_bw, nv_encoder->dp.link_nr);
+ return auxch_tx(dev, dp->auxch, 8, DP_TRAINING_LANE0_SET, dp->conf, 4);
+}
- ret = nouveau_dp_link_bw_set(encoder, nv_encoder->dp.link_bw);
- if (ret)
- return false;
+static int
+dp_link_train_update(struct drm_device *dev, struct dp_state *dp, u32 delay)
+{
+ int ret;
- config[0] = nv_encoder->dp.link_nr;
- if (nv_encoder->dp.dpcd_version >= 0x11 &&
- nv_encoder->dp.enhanced_frame)
- config[0] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+ udelay(delay);
- ret = nouveau_dp_lane_count_set(encoder, config[0]);
+ ret = auxch_tx(dev, dp->auxch, 9, DP_LANE0_1_STATUS, dp->stat, 6);
if (ret)
- return false;
+ return ret;
- /* clock recovery */
- NV_DEBUG_KMS(dev, "\tbegin cr\n");
- ret = nouveau_dp_link_train_set(encoder, DP_TRAINING_PATTERN_1);
- if (ret)
- goto stop;
+ NV_DEBUG_KMS(dev, "status %02x %02x %02x %02x %02x %02x\n",
+ dp->stat[0], dp->stat[1], dp->stat[2], dp->stat[3],
+ dp->stat[4], dp->stat[5]);
+ return 0;
+}
- tries = 0;
- voltage = -1;
- memset(config, 0x00, sizeof(config));
- for (;;) {
- if (!nouveau_dp_link_train_commit(encoder, config))
- break;
+static int
+dp_link_train_cr(struct drm_device *dev, struct dp_state *dp)
+{
+ bool cr_done = false, abort = false;
+ int voltage = dp->conf[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
+ int tries = 0, i;
- udelay(100);
+ dp_set_training_pattern(dev, dp, DP_TRAINING_PATTERN_1);
- ret = auxch_rd(encoder, DP_LANE0_1_STATUS, status, 2);
- if (ret)
+ do {
+ if (dp_link_train_commit(dev, dp) ||
+ dp_link_train_update(dev, dp, 100))
break;
- NV_DEBUG_KMS(dev, "\t\tstatus: 0x%02x 0x%02x\n",
- status[0], status[1]);
cr_done = true;
- cr_max_vs = false;
- for (i = 0; i < nv_encoder->dp.link_nr; i++) {
- int lane = (status[i >> 1] >> ((i & 1) * 4)) & 0xf;
-
+ for (i = 0; i < dp->link_nr; i++) {
+ u8 lane = (dp->stat[i >> 1] >> ((i & 1) * 4)) & 0xf;
if (!(lane & DP_LANE_CR_DONE)) {
cr_done = false;
- if (config[i] & DP_TRAIN_MAX_PRE_EMPHASIS_REACHED)
- cr_max_vs = true;
+ if (dp->conf[i] & DP_TRAIN_MAX_SWING_REACHED)
+ abort = true;
break;
}
}
- if ((config[0] & DP_TRAIN_VOLTAGE_SWING_MASK) != voltage) {
- voltage = config[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
+ if ((dp->conf[0] & DP_TRAIN_VOLTAGE_SWING_MASK) != voltage) {
+ voltage = dp->conf[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
tries = 0;
}
+ } while (!cr_done && !abort && ++tries < 5);
- if (cr_done || cr_max_vs || (++tries == 5))
- break;
-
- if (!nouveau_dp_link_train_adjust(encoder, config))
- break;
- }
-
- if (!cr_done)
- goto stop;
+ return cr_done ? 0 : -1;
+}
- /* channel equalisation */
- NV_DEBUG_KMS(dev, "\tbegin eq\n");
- ret = nouveau_dp_link_train_set(encoder, DP_TRAINING_PATTERN_2);
- if (ret)
- goto stop;
+static int
+dp_link_train_eq(struct drm_device *dev, struct dp_state *dp)
+{
+ bool eq_done, cr_done = true;
+ int tries = 0, i;
- for (tries = 0; tries <= 5; tries++) {
- udelay(400);
+ dp_set_training_pattern(dev, dp, DP_TRAINING_PATTERN_2);
- ret = auxch_rd(encoder, DP_LANE0_1_STATUS, status, 3);
- if (ret)
+ do {
+ if (dp_link_train_update(dev, dp, 400))
break;
- NV_DEBUG_KMS(dev, "\t\tstatus: 0x%02x 0x%02x\n",
- status[0], status[1]);
-
- eq_done = true;
- if (!(status[2] & DP_INTERLANE_ALIGN_DONE))
- eq_done = false;
- for (i = 0; eq_done && i < nv_encoder->dp.link_nr; i++) {
- int lane = (status[i >> 1] >> ((i & 1) * 4)) & 0xf;
-
- if (!(lane & DP_LANE_CR_DONE)) {
+ eq_done = !!(dp->stat[2] & DP_INTERLANE_ALIGN_DONE);
+ for (i = 0; i < dp->link_nr && eq_done; i++) {
+ u8 lane = (dp->stat[i >> 1] >> ((i & 1) * 4)) & 0xf;
+ if (!(lane & DP_LANE_CR_DONE))
cr_done = false;
- break;
- }
-
if (!(lane & DP_LANE_CHANNEL_EQ_DONE) ||
- !(lane & DP_LANE_SYMBOL_LOCKED)) {
+ !(lane & DP_LANE_SYMBOL_LOCKED))
eq_done = false;
- break;
- }
}
- if (eq_done || !cr_done)
+ if (dp_link_train_commit(dev, dp))
break;
+ } while (!eq_done && cr_done && ++tries <= 5);
- if (!nouveau_dp_link_train_adjust(encoder, config) ||
- !nouveau_dp_link_train_commit(encoder, config))
- break;
- }
+ return eq_done ? 0 : -1;
+}
-stop:
- /* end link training */
- ret = nouveau_dp_link_train_set(encoder, DP_TRAINING_PATTERN_DISABLE);
- if (ret)
+bool
+nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate)
+{
+ struct drm_nouveau_private *dev_priv = encoder->dev->dev_private;
+ struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio;
+ struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
+ struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
+ struct nouveau_connector *nv_connector =
+ nouveau_encoder_connector_get(nv_encoder);
+ struct drm_device *dev = encoder->dev;
+ struct nouveau_i2c_chan *auxch;
+ const u32 bw_list[] = { 270000, 162000, 0 };
+ const u32 *link_bw = bw_list;
+ struct dp_state dp;
+
+ auxch = nouveau_i2c_find(dev, nv_encoder->dcb->i2c_index);
+ if (!auxch)
return false;
- /* retry at a lower setting, if possible */
- if (!ret && !(eq_done && cr_done)) {
- NV_DEBUG_KMS(dev, "\twe failed\n");
- if (nv_encoder->dp.link_bw != DP_LINK_BW_1_62) {
- NV_DEBUG_KMS(dev, "retry link training at low rate\n");
- nv_encoder->dp.link_bw = DP_LINK_BW_1_62;
- goto train;
- }
+ dp.table = nouveau_dp_bios_data(dev, nv_encoder->dcb, &dp.entry);
+ if (!dp.table)
+ return -EINVAL;
+
+ dp.dcb = nv_encoder->dcb;
+ dp.crtc = nv_crtc->index;
+ dp.auxch = auxch->rd;
+ 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
+ * we take during link training (DP_SET_POWER is one), we need
+ * to ignore them for the moment to avoid races.
+ */
+ pgpio->irq_enable(dev, nv_connector->dcb->gpio_tag, 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);
}
- if (dpe->script1) {
- NV_DEBUG_KMS(dev, "SOR-%d: running DP script 1\n", nv_encoder->or);
- nouveau_bios_run_init_table(dev, le16_to_cpu(dpe->script1),
- nv_encoder->dcb, -1);
+ /* execute pre-train script from vbios */
+ nouveau_bios_run_init_table(dev, ROM16(dp.entry[6]), dp.dcb, dp.crtc);
+
+ /* start off at highest link rate supported by encoder and display */
+ while (*link_bw > nv_encoder->dp.link_bw)
+ link_bw++;
+
+ while (link_bw[0]) {
+ /* find minimum required lane count at this link rate */
+ dp.link_nr = nv_encoder->dp.link_nr;
+ while ((dp.link_nr >> 1) * link_bw[0] > datarate)
+ dp.link_nr >>= 1;
+
+ /* drop link rate to minimum with this lane count */
+ while ((link_bw[1] * dp.link_nr) > datarate)
+ link_bw++;
+ dp.link_bw = link_bw[0];
+
+ /* program selected link configuration */
+ dp_set_link_config(dev, &dp);
+
+ /* attempt to train the link at this configuration */
+ memset(dp.stat, 0x00, sizeof(dp.stat));
+ if (!dp_link_train_cr(dev, &dp) &&
+ !dp_link_train_eq(dev, &dp))
+ break;
+
+ /* retry at lower rate */
+ link_bw++;
}
- /* re-enable hotplug detect */
- pgpio->irq_enable(dev, nv_connector->dcb->gpio_tag, hpd_state);
+ /* finish link training */
+ 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);
- return eq_done;
+ /* re-enable hotplug detect */
+ pgpio->irq_enable(dev, nv_connector->dcb->gpio_tag, true);
+ return true;
}
bool
{
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct drm_device *dev = encoder->dev;
- uint8_t dpcd[4];
+ struct nouveau_i2c_chan *auxch;
+ u8 *dpcd = nv_encoder->dp.dpcd;
int ret;
- ret = auxch_rd(encoder, 0x0000, dpcd, 4);
- if (ret)
+ auxch = nouveau_i2c_find(dev, nv_encoder->dcb->i2c_index);
+ if (!auxch)
return false;
- NV_DEBUG_KMS(dev, "encoder: link_bw %d, link_nr %d\n"
- "display: link_bw %d, link_nr %d version 0x%02x\n",
- nv_encoder->dcb->dpconf.link_bw,
- nv_encoder->dcb->dpconf.link_nr,
- dpcd[1], dpcd[2] & 0x0f, dpcd[0]);
+ ret = auxch_tx(dev, auxch->rd, 9, DP_DPCD_REV, dpcd, 8);
+ if (ret)
+ return false;
- nv_encoder->dp.dpcd_version = dpcd[0];
+ nv_encoder->dp.link_bw = 27000 * dpcd[1];
+ nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
- nv_encoder->dp.link_bw = dpcd[1];
- if (nv_encoder->dp.link_bw != DP_LINK_BW_1_62 &&
- !nv_encoder->dcb->dpconf.link_bw)
- nv_encoder->dp.link_bw = DP_LINK_BW_1_62;
+ NV_DEBUG_KMS(dev, "display: %dx%d dpcd 0x%02x\n",
+ nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, dpcd[0]);
+ NV_DEBUG_KMS(dev, "encoder: %dx%d\n",
+ nv_encoder->dcb->dpconf.link_nr,
+ nv_encoder->dcb->dpconf.link_bw);
- nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
- if (nv_encoder->dp.link_nr > nv_encoder->dcb->dpconf.link_nr)
+ if (nv_encoder->dcb->dpconf.link_nr < nv_encoder->dp.link_nr)
nv_encoder->dp.link_nr = nv_encoder->dcb->dpconf.link_nr;
+ if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
+ nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
- nv_encoder->dp.enhanced_frame = (dpcd[2] & DP_ENHANCED_FRAME_CAP);
+ NV_DEBUG_KMS(dev, "maximum: %dx%d\n",
+ nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
return true;
}
projects / cascardo / linux.git / blobdiff