aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/nouveau/nouveau_dp.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_dp.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_dp.c297
1 files changed, 1 insertions, 296 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
index 59838651ee8f..36fd22500569 100644
--- a/drivers/gpu/drm/nouveau/nouveau_dp.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -35,300 +35,6 @@
#include <subdev/gpio.h>
#include <subdev/i2c.h>
-/******************************************************************************
- * link training
- *****************************************************************************/
-struct dp_state {
- struct nouveau_i2c_port *auxch;
- struct nouveau_object *core;
- struct dcb_output *dcb;
- 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)
-{
- struct nouveau_drm *drm = nouveau_drm(dev);
- struct dcb_output *dcb = dp->dcb;
- const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
- const u32 moff = (dp->crtc << 3) | (link << 2) | or;
- u8 sink[2];
- u32 data;
-
- NV_DEBUG(drm, "%d lanes at %d KB/s\n", dp->link_nr, dp->link_bw);
-
- /* set desired link configuration on the source */
- data = ((dp->link_bw / 27000) << 8) | dp->link_nr;
- if (dp->dpcd[2] & DP_ENHANCED_FRAME_CAP)
- data |= NV94_DISP_SOR_DP_LNKCTL_FRAME_ENH;
-
- nv_call(dp->core, NV94_DISP_SOR_DP_LNKCTL + moff, data);
-
- /* 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;
-
- nv_wraux(dp->auxch, DP_LINK_BW_SET, sink, 2);
-}
-
-static void
-dp_set_training_pattern(struct drm_device *dev, struct dp_state *dp, u8 pattern)
-{
- struct nouveau_drm *drm = nouveau_drm(dev);
- struct dcb_output *dcb = dp->dcb;
- const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
- const u32 moff = (dp->crtc << 3) | (link << 2) | or;
- u8 sink_tp;
-
- NV_DEBUG(drm, "training pattern %d\n", pattern);
-
- nv_call(dp->core, NV94_DISP_SOR_DP_TRAIN + moff, pattern);
-
- nv_rdaux(dp->auxch, DP_TRAINING_PATTERN_SET, &sink_tp, 1);
- sink_tp &= ~DP_TRAINING_PATTERN_MASK;
- sink_tp |= pattern;
- nv_wraux(dp->auxch, DP_TRAINING_PATTERN_SET, &sink_tp, 1);
-}
-
-static int
-dp_link_train_commit(struct drm_device *dev, struct dp_state *dp)
-{
- struct nouveau_drm *drm = nouveau_drm(dev);
- struct dcb_output *dcb = dp->dcb;
- const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
- const u32 moff = (dp->crtc << 3) | (link << 2) | or;
- 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(drm, "config lane %d %02x\n", i, dp->conf[i]);
-
- nv_call(dp->core, NV94_DISP_SOR_DP_DRVCTL(i) + moff, (lvsw << 8) | lpre);
- }
-
- return nv_wraux(dp->auxch, DP_TRAINING_LANE0_SET, dp->conf, 4);
-}
-
-static int
-dp_link_train_update(struct drm_device *dev, struct dp_state *dp, u32 delay)
-{
- struct nouveau_drm *drm = nouveau_drm(dev);
- int ret;
-
- udelay(delay);
-
- ret = nv_rdaux(dp->auxch, DP_LANE0_1_STATUS, dp->stat, 6);
- if (ret)
- return ret;
-
- NV_DEBUG(drm, "status %*ph\n", 6, dp->stat);
- 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_link_train_init(struct drm_device *dev, struct dp_state *dp, bool spread)
-{
- struct dcb_output *dcb = dp->dcb;
- const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
- const u32 moff = (dp->crtc << 3) | (link << 2) | or;
-
- nv_call(dp->core, NV94_DISP_SOR_DP_TRAIN + moff, (spread ?
- NV94_DISP_SOR_DP_TRAIN_INIT_SPREAD_ON :
- NV94_DISP_SOR_DP_TRAIN_INIT_SPREAD_OFF) |
- NV94_DISP_SOR_DP_TRAIN_OP_INIT);
-}
-
-static void
-dp_link_train_fini(struct drm_device *dev, struct dp_state *dp)
-{
- struct dcb_output *dcb = dp->dcb;
- const u32 or = ffs(dcb->or) - 1, link = !(dcb->sorconf.link & 1);
- const u32 moff = (dp->crtc << 3) | (link << 2) | or;
-
- nv_call(dp->core, NV94_DISP_SOR_DP_TRAIN + moff,
- NV94_DISP_SOR_DP_TRAIN_OP_FINI);
-}
-
-static bool
-nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate,
- struct nouveau_object *core)
-{
- 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_drm *drm = nouveau_drm(dev);
- struct nouveau_i2c *i2c = nouveau_i2c(drm->device);
- struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
- const u32 bw_list[] = { 270000, 162000, 0 };
- const u32 *link_bw = bw_list;
- struct dp_state dp;
-
- dp.auxch = i2c->find(i2c, nv_encoder->dcb->i2c_index);
- if (!dp.auxch)
- return false;
-
- dp.core = core;
- dp.dcb = nv_encoder->dcb;
- dp.crtc = nv_crtc->index;
- 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.
- */
- gpio->irq(gpio, 0, nv_connector->hpd, 0xff, false);
-
- /* enable down-spreading and execute pre-train script from vbios */
- dp_link_train_init(dev, &dp, nv_encoder->dp.dpcd[3] & 1);
-
- /* 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 */
- gpio->irq(gpio, 0, nv_connector->hpd, 0xff, true);
- return true;
-}
-
-void
-nouveau_dp_dpms(struct drm_encoder *encoder, int mode, u32 datarate,
- struct nouveau_object *core)
-{
- struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct nouveau_drm *drm = nouveau_drm(encoder->dev);
- struct nouveau_i2c *i2c = nouveau_i2c(drm->device);
- struct nouveau_i2c_port *auxch;
- u8 status;
-
- auxch = i2c->find(i2c, 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;
-
- nv_wraux(auxch, DP_SET_POWER, &status, 1);
-
- if (mode == DRM_MODE_DPMS_ON)
- nouveau_dp_link_train(encoder, datarate, core);
-}
-
static void
nouveau_dp_probe_oui(struct drm_device *dev, struct nouveau_i2c_port *auxch,
u8 *dpcd)
@@ -355,12 +61,11 @@ nouveau_dp_detect(struct drm_encoder *encoder)
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct drm_device *dev = encoder->dev;
struct nouveau_drm *drm = nouveau_drm(dev);
- struct nouveau_i2c *i2c = nouveau_i2c(drm->device);
struct nouveau_i2c_port *auxch;
u8 *dpcd = nv_encoder->dp.dpcd;
int ret;
- auxch = i2c->find(i2c, nv_encoder->dcb->i2c_index);
+ auxch = nv_encoder->i2c;
if (!auxch)
return false;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.