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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.c580
1 files changed, 25 insertions, 555 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
index 7e289d2ad8e..5675ffc175a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dp.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -22,536 +22,62 @@
* Authors: Ben Skeggs
*/
-#include "drmP.h"
+#include <drm/drmP.h>
+#include <drm/drm_dp_helper.h>
-#include "nouveau_drv.h"
-#include "nouveau_i2c.h"
+#include "nouveau_drm.h"
#include "nouveau_connector.h"
#include "nouveau_encoder.h"
#include "nouveau_crtc.h"
-#include "nouveau_gpio.h"
-/******************************************************************************
- * aux channel util functions
- *****************************************************************************/
-#define AUX_DBG(fmt, args...) do { \
- if (nouveau_reg_debug & NOUVEAU_REG_DEBUG_AUXCH) { \
- NV_PRINTK(KERN_DEBUG, dev, "AUXCH(%d): " fmt, ch, ##args); \
- } \
-} while (0)
-#define AUX_ERR(fmt, args...) NV_ERROR(dev, "AUXCH(%d): " fmt, ch, ##args)
+#include <core/class.h>
-static void
-auxch_fini(struct drm_device *dev, int ch)
-{
- nv_mask(dev, 0x00e4e4 + (ch * 0x50), 0x00310000, 0x00000000);
-}
-
-static int
-auxch_init(struct drm_device *dev, int ch)
-{
- const u32 unksel = 1; /* nfi which to use, or if it matters.. */
- const u32 ureq = unksel ? 0x00100000 : 0x00200000;
- const u32 urep = unksel ? 0x01000000 : 0x02000000;
- u32 ctrl, timeout;
-
- /* wait up to 1ms for any previous transaction to be done... */
- timeout = 1000;
- do {
- ctrl = nv_rd32(dev, 0x00e4e4 + (ch * 0x50));
- udelay(1);
- if (!timeout--) {
- AUX_ERR("begin idle timeout 0x%08x", ctrl);
- return -EBUSY;
- }
- } while (ctrl & 0x03010000);
-
- /* set some magic, and wait up to 1ms for it to appear */
- nv_mask(dev, 0x00e4e4 + (ch * 0x50), 0x00300000, ureq);
- timeout = 1000;
- do {
- ctrl = nv_rd32(dev, 0x00e4e4 + (ch * 0x50));
- udelay(1);
- if (!timeout--) {
- AUX_ERR("magic wait 0x%08x\n", ctrl);
- auxch_fini(dev, ch);
- return -EBUSY;
- }
- } while ((ctrl & 0x03000000) != urep);
-
- return 0;
-}
-
-static int
-auxch_tx(struct drm_device *dev, int ch, u8 type, u32 addr, u8 *data, u8 size)
-{
- u32 ctrl, stat, timeout, retries;
- u32 xbuf[4] = {};
- int ret, i;
-
- AUX_DBG("%d: 0x%08x %d\n", type, addr, size);
-
- ret = auxch_init(dev, ch);
- if (ret)
- goto out;
-
- stat = nv_rd32(dev, 0x00e4e8 + (ch * 0x50));
- if (!(stat & 0x10000000)) {
- AUX_DBG("sink not detected\n");
- ret = -ENXIO;
- goto out;
- }
-
- if (!(type & 1)) {
- memcpy(xbuf, data, size);
- for (i = 0; i < 16; i += 4) {
- AUX_DBG("wr 0x%08x\n", xbuf[i / 4]);
- nv_wr32(dev, 0x00e4c0 + (ch * 0x50) + i, xbuf[i / 4]);
- }
- }
-
- ctrl = nv_rd32(dev, 0x00e4e4 + (ch * 0x50));
- ctrl &= ~0x0001f0ff;
- ctrl |= type << 12;
- ctrl |= size - 1;
- nv_wr32(dev, 0x00e4e0 + (ch * 0x50), addr);
-
- /* retry transaction a number of times on failure... */
- ret = -EREMOTEIO;
- for (retries = 0; retries < 32; retries++) {
- /* reset, and delay a while if this is a retry */
- nv_wr32(dev, 0x00e4e4 + (ch * 0x50), 0x80000000 | ctrl);
- nv_wr32(dev, 0x00e4e4 + (ch * 0x50), 0x00000000 | ctrl);
- if (retries)
- udelay(400);
-
- /* transaction request, wait up to 1ms for it to complete */
- nv_wr32(dev, 0x00e4e4 + (ch * 0x50), 0x00010000 | ctrl);
-
- timeout = 1000;
- do {
- ctrl = nv_rd32(dev, 0x00e4e4 + (ch * 0x50));
- udelay(1);
- if (!timeout--) {
- AUX_ERR("tx req timeout 0x%08x\n", ctrl);
- goto out;
- }
- } while (ctrl & 0x00010000);
-
- /* read status, and check if transaction completed ok */
- stat = nv_mask(dev, 0x00e4e8 + (ch * 0x50), 0, 0);
- if (!(stat & 0x000f0f00)) {
- ret = 0;
- break;
- }
-
- AUX_DBG("%02d 0x%08x 0x%08x\n", retries, ctrl, stat);
- }
-
- if (type & 1) {
- for (i = 0; i < 16; i += 4) {
- xbuf[i / 4] = nv_rd32(dev, 0x00e4d0 + (ch * 0x50) + i);
- AUX_DBG("rd 0x%08x\n", xbuf[i / 4]);
- }
- memcpy(data, xbuf, size);
- }
-
-out:
- auxch_fini(dev, ch);
- return ret;
-}
-
-u8 *
-nouveau_dp_bios_data(struct drm_device *dev, struct dcb_entry *dcb, u8 **entry)
-{
- 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;
- }
-
- if (d.version != 1) {
- NV_ERROR(dev, "BIT 'd' table version %d unknown\n", d.version);
- return NULL;
- }
-
- table = ROMPTR(dev, d.data[0]);
- if (!table) {
- NV_ERROR(dev, "displayport table pointer invalid\n");
- return NULL;
- }
-
- switch (table[0]) {
- case 0x20:
- case 0x21:
- case 0x30:
- case 0x40:
- break;
- default:
- NV_ERROR(dev, "displayport table 0x%02x unknown\n", table[0]);
- return NULL;
- }
-
- for (i = 0; i < table[3]; i++) {
- *entry = ROMPTR(dev, table[table[1] + (i * table[2])]);
- if (*entry && bios_encoder_match(dcb, ROM32((*entry)[0])))
- return table;
- }
-
- NV_ERROR(dev, "displayport encoder table not found\n");
- return NULL;
-}
-
-/******************************************************************************
- * link training
- *****************************************************************************/
-struct dp_state {
- struct dp_train_func *func;
- struct dcb_entry *dcb;
- int auxch;
- int crtc;
- u8 *dpcd;
- int link_nr;
- u32 link_bw;
- u8 stat[6];
- u8 conf[4];
-};
-
-static void
-dp_set_link_config(struct drm_device *dev, struct dp_state *dp)
-{
- u8 sink[2];
-
- NV_DEBUG_KMS(dev, "%d lanes at %d KB/s\n", dp->link_nr, dp->link_bw);
-
- /* 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);
-
- /* 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)
- sink[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
-
- 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 pattern)
-{
- u8 sink_tp;
-
- NV_DEBUG_KMS(dev, "training pattern %d\n", pattern);
-
- 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 |= pattern;
- auxch_tx(dev, dp->auxch, 8, DP_TRAINING_PATTERN_SET, &sink_tp, 1);
-}
-
-static int
-dp_link_train_commit(struct drm_device *dev, struct dp_state *dp)
-{
- int i;
-
- for (i = 0; i < dp->link_nr; i++) {
- u8 lane = (dp->stat[4 + (i >> 1)] >> ((i & 1) * 4)) & 0xf;
- u8 lpre = (lane & 0x0c) >> 2;
- u8 lvsw = (lane & 0x03) >> 0;
-
- 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]);
- dp->func->train_adj(dev, dp->dcb, i, lvsw, lpre);
- }
-
- return auxch_tx(dev, dp->auxch, 8, DP_TRAINING_LANE0_SET, dp->conf, 4);
-}
-
-static int
-dp_link_train_update(struct drm_device *dev, struct dp_state *dp, u32 delay)
-{
- int ret;
-
- udelay(delay);
-
- ret = auxch_tx(dev, dp->auxch, 9, DP_LANE0_1_STATUS, dp->stat, 6);
- if (ret)
- return ret;
-
- 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;
-}
-
-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;
-
- dp_set_training_pattern(dev, dp, DP_TRAINING_PATTERN_1);
-
- do {
- if (dp_link_train_commit(dev, dp) ||
- dp_link_train_update(dev, dp, 100))
- break;
-
- cr_done = true;
- 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 (dp->conf[i] & DP_TRAIN_MAX_SWING_REACHED)
- abort = true;
- break;
- }
- }
-
- 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);
-
- return cr_done ? 0 : -1;
-}
-
-static int
-dp_link_train_eq(struct drm_device *dev, struct dp_state *dp)
-{
- bool eq_done, cr_done = true;
- int tries = 0, i;
-
- dp_set_training_pattern(dev, dp, DP_TRAINING_PATTERN_2);
-
- do {
- if (dp_link_train_update(dev, dp, 400))
- break;
-
- 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;
- if (!(lane & DP_LANE_CHANNEL_EQ_DONE) ||
- !(lane & DP_LANE_SYMBOL_LOCKED))
- eq_done = false;
- }
-
- if (dp_link_train_commit(dev, dp))
- break;
- } while (!eq_done && cr_done && ++tries <= 5);
-
- 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);
-}
+#include <subdev/gpio.h>
+#include <subdev/i2c.h>
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,
- struct dp_train_func *func)
-{
- 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;
-
- dp.func = func;
- dp.dcb = nv_encoder->dcb;
- dp.crtc = nv_crtc->index;
- dp.auxch = auxch->drive;
- 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.
- */
- nouveau_gpio_irq(dev, 0, nv_connector->hpd, 0xff, false);
-
- /* enable down-spreading, if possible */
- dp_set_downspread(dev, &dp, nv_encoder->dp.dpcd[3] & 1);
-
- /* execute pre-train script from vbios */
- 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)
- 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++;
- }
-
- /* finish link training */
- dp_set_training_pattern(dev, &dp, DP_TRAINING_PATTERN_DISABLE);
-
- /* execute post-train script from vbios */
- 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);
-}
-
-static void
-nouveau_dp_probe_oui(struct drm_device *dev, struct nouveau_i2c_chan *auxch,
+nouveau_dp_probe_oui(struct drm_device *dev, struct nouveau_i2c_port *auxch,
u8 *dpcd)
{
+ struct nouveau_drm *drm = nouveau_drm(dev);
u8 buf[3];
if (!(dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
return;
- if (!auxch_tx(dev, auxch->drive, 9, DP_SINK_OUI, buf, 3))
- NV_DEBUG_KMS(dev, "Sink OUI: %02hx%02hx%02hx\n",
+ if (!nv_rdaux(auxch, DP_SINK_OUI, buf, 3))
+ NV_DEBUG(drm, "Sink OUI: %02hx%02hx%02hx\n",
buf[0], buf[1], buf[2]);
- if (!auxch_tx(dev, auxch->drive, 9, DP_BRANCH_OUI, buf, 3))
- NV_DEBUG_KMS(dev, "Branch OUI: %02hx%02hx%02hx\n",
+ if (!nv_rdaux(auxch, DP_BRANCH_OUI, buf, 3))
+ NV_DEBUG(drm, "Branch OUI: %02hx%02hx%02hx\n",
buf[0], buf[1], buf[2]);
}
-bool
-nouveau_dp_detect(struct drm_encoder *encoder)
+int
+nouveau_dp_detect(struct nouveau_encoder *nv_encoder)
{
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct drm_device *dev = encoder->dev;
- struct nouveau_i2c_chan *auxch;
+ struct drm_device *dev = nv_encoder->base.base.dev;
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ struct nouveau_i2c_port *auxch;
u8 *dpcd = nv_encoder->dp.dpcd;
int ret;
- auxch = nouveau_i2c_find(dev, nv_encoder->dcb->i2c_index);
+ auxch = nv_encoder->i2c;
if (!auxch)
- return false;
+ return -ENODEV;
- ret = auxch_tx(dev, auxch->drive, 9, DP_DPCD_REV, dpcd, 8);
+ ret = nv_rdaux(auxch, DP_DPCD_REV, dpcd, 8);
if (ret)
- return false;
+ return ret;
nv_encoder->dp.link_bw = 27000 * dpcd[1];
nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
- NV_DEBUG_KMS(dev, "display: %dx%d dpcd 0x%02x\n",
+ NV_DEBUG(drm, "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_DEBUG(drm, "encoder: %dx%d\n",
nv_encoder->dcb->dpconf.link_nr,
nv_encoder->dcb->dpconf.link_bw);
@@ -560,65 +86,9 @@ nouveau_dp_detect(struct drm_encoder *encoder)
if (nv_encoder->dcb->dpconf.link_bw < nv_encoder->dp.link_bw)
nv_encoder->dp.link_bw = nv_encoder->dcb->dpconf.link_bw;
- NV_DEBUG_KMS(dev, "maximum: %dx%d\n",
+ NV_DEBUG(drm, "maximum: %dx%d\n",
nv_encoder->dp.link_nr, nv_encoder->dp.link_bw);
nouveau_dp_probe_oui(dev, auxch, dpcd);
-
- return true;
-}
-
-int
-nouveau_dp_auxch(struct nouveau_i2c_chan *auxch, int cmd, int addr,
- uint8_t *data, int data_nr)
-{
- return auxch_tx(auxch->dev, auxch->drive, cmd, addr, data, data_nr);
-}
-
-static int
-nouveau_dp_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
-{
- struct nouveau_i2c_chan *auxch = (struct nouveau_i2c_chan *)adap;
- struct i2c_msg *msg = msgs;
- int ret, mcnt = num;
-
- while (mcnt--) {
- u8 remaining = msg->len;
- u8 *ptr = msg->buf;
-
- while (remaining) {
- u8 cnt = (remaining > 16) ? 16 : remaining;
- u8 cmd;
-
- if (msg->flags & I2C_M_RD)
- cmd = AUX_I2C_READ;
- else
- cmd = AUX_I2C_WRITE;
-
- if (mcnt || remaining > 16)
- cmd |= AUX_I2C_MOT;
-
- ret = nouveau_dp_auxch(auxch, cmd, msg->addr, ptr, cnt);
- if (ret < 0)
- return ret;
-
- ptr += cnt;
- remaining -= cnt;
- }
-
- msg++;
- }
-
- return num;
-}
-
-static u32
-nouveau_dp_i2c_func(struct i2c_adapter *adap)
-{
- return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+ return 0;
}
-
-const struct i2c_algorithm nouveau_dp_i2c_algo = {
- .master_xfer = nouveau_dp_i2c_xfer,
- .functionality = nouveau_dp_i2c_func
-};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 21:36:33 +0000