diff options
author | Ben Skeggs <bskeggs@redhat.com> | 2023-09-20 00:56:23 +0300 |
---|---|---|
committer | Lyude Paul <lyude@redhat.com> | 2023-09-20 01:22:12 +0300 |
commit | bfb03a077ba9955c165d355cb3ce4d3622a9c8c6 (patch) | |
tree | f2ae9e862634fd43a8a10507bfaaa7cf704a65e6 /drivers/gpu/drm/nouveau | |
parent | bd7a61bcbb50bfca1b9a585f17d5590dbb521b78 (diff) | |
download | linux-bfb03a077ba9955c165d355cb3ce4d3622a9c8c6.tar.xz |
drm/nouveau/disp: add dp rates method
- moves building of link rates table from NVKM to DRM
- preparing to move link training out of supervisor
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Danilo Krummrich <me@dakr.org>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230919220442.202488-29-lyude@redhat.com
Diffstat (limited to 'drivers/gpu/drm/nouveau')
-rw-r--r-- | drivers/gpu/drm/nouveau/include/nvif/if0012.h | 13 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/include/nvif/outp.h | 8 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dp.c | 143 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_encoder.h | 12 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvif/outp.c | 21 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c | 66 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h | 1 | ||||
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c | 24 |
8 files changed, 189 insertions, 99 deletions
diff --git a/drivers/gpu/drm/nouveau/include/nvif/if0012.h b/drivers/gpu/drm/nouveau/include/nvif/if0012.h index 94f1e55b0ce6..ddc8e3d85823 100644 --- a/drivers/gpu/drm/nouveau/include/nvif/if0012.h +++ b/drivers/gpu/drm/nouveau/include/nvif/if0012.h @@ -33,6 +33,7 @@ union nvif_outp_args { #define NVIF_OUTP_V0_DP_AUX_PWR 0x70 #define NVIF_OUTP_V0_DP_AUX_XFER 0x71 +#define NVIF_OUTP_V0_DP_RATES 0x72 #define NVIF_OUTP_V0_DP_RETRAIN 0x73 #define NVIF_OUTP_V0_DP_MST_VCPI 0x78 @@ -194,6 +195,18 @@ union nvif_outp_dp_aux_xfer_args { } v0; }; +union nvif_outp_dp_rates_args { + struct nvif_outp_dp_rates_v0 { + __u8 version; + __u8 pad01[6]; + __u8 rates; + struct { + __s8 dpcd; + __u32 rate; + } rate[8]; + } v0; +}; + union nvif_outp_dp_retrain_args { struct nvif_outp_dp_retrain_vn { } vn; diff --git a/drivers/gpu/drm/nouveau/include/nvif/outp.h b/drivers/gpu/drm/nouveau/include/nvif/outp.h index dd4dd0e2a7a1..596d543acd30 100644 --- a/drivers/gpu/drm/nouveau/include/nvif/outp.h +++ b/drivers/gpu/drm/nouveau/include/nvif/outp.h @@ -59,6 +59,14 @@ int nvif_outp_hda_eld(struct nvif_outp *, int head, void *data, u32 size); int nvif_outp_dp_aux_pwr(struct nvif_outp *, bool enable); int nvif_outp_dp_aux_xfer(struct nvif_outp *, u8 type, u8 *size, u32 addr, u8 *data); + +struct nvif_outp_dp_rate { + int dpcd; /* -1 for non-indexed rates */ + u32 rate; +}; + +int nvif_outp_dp_rates(struct nvif_outp *, struct nvif_outp_dp_rate *rate, int rate_nr); + int nvif_outp_dp_retrain(struct nvif_outp *); int nvif_outp_dp_mst_vcpi(struct nvif_outp *, int head, u8 start_slot, u8 num_slots, u16 pbn, u16 aligned_pbn); diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c index 01aa9b9c74a2..f26769bca195 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dp.c +++ b/drivers/gpu/drm/nouveau/nouveau_dp.c @@ -42,6 +42,21 @@ nouveau_dp_has_sink_count(struct drm_connector *connector, return drm_dp_read_sink_count_cap(connector, outp->dp.dpcd, &outp->dp.desc); } +static bool +nouveau_dp_probe_lttpr(struct nouveau_encoder *outp) +{ + u8 rev, size = sizeof(rev); + int ret; + + ret = nvif_outp_dp_aux_xfer(&outp->outp, DP_AUX_NATIVE_READ, &size, + DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV, + &rev); + if (ret || size < sizeof(rev) || rev < 0x14) + return false; + + return true; +} + static enum drm_connector_status nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector, struct nouveau_encoder *outp) @@ -53,10 +68,99 @@ nouveau_dp_probe_dpcd(struct nouveau_connector *nv_connector, int ret; u8 *dpcd = outp->dp.dpcd; + outp->dp.lttpr.nr = 0; + outp->dp.rate_nr = 0; + outp->dp.link_nr = 0; + outp->dp.link_bw = 0; + + if (connector->connector_type != DRM_MODE_CONNECTOR_eDP && + nouveau_dp_probe_lttpr(outp) && + !drm_dp_read_dpcd_caps(aux, dpcd) && + !drm_dp_read_lttpr_common_caps(aux, dpcd, outp->dp.lttpr.caps)) { + int nr = drm_dp_lttpr_count(outp->dp.lttpr.caps); + + if (nr > 0) + outp->dp.lttpr.nr = nr; + } + ret = drm_dp_read_dpcd_caps(aux, dpcd); if (ret < 0) goto out; + outp->dp.link_nr = dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK; + if (outp->dcb->dpconf.link_nr < outp->dp.link_nr) + outp->dp.link_nr = outp->dcb->dpconf.link_nr; + + if (outp->dp.lttpr.nr) { + int links = drm_dp_lttpr_max_lane_count(outp->dp.lttpr.caps); + + if (links && links < outp->dp.link_nr) + outp->dp.link_nr = links; + } + + if (connector->connector_type == DRM_MODE_CONNECTOR_eDP && dpcd[DP_DPCD_REV] >= 0x13) { + __le16 rates[DP_MAX_SUPPORTED_RATES]; + + ret = drm_dp_dpcd_read(aux, DP_SUPPORTED_LINK_RATES, rates, sizeof(rates)); + if (ret == sizeof(rates)) { + for (int i = 0; i < ARRAY_SIZE(rates); i++) { + u32 rate = (le16_to_cpu(rates[i]) * 200) / 10; + int j; + + if (!rate) + break; + + for (j = 0; j < outp->dp.rate_nr; j++) { + if (rate > outp->dp.rate[j].rate) { + for (int k = outp->dp.rate_nr; k > j; k--) + outp->dp.rate[k] = outp->dp.rate[k - 1]; + break; + } + } + + outp->dp.rate[j].dpcd = i; + outp->dp.rate[j].rate = rate; + outp->dp.rate_nr++; + } + } + } + + if (!outp->dp.rate_nr) { + const u32 rates[] = { 810000, 540000, 270000, 162000 }; + u32 max_rate = dpcd[DP_MAX_LINK_RATE] * 27000; + + if (outp->dp.lttpr.nr) { + int rate = drm_dp_lttpr_max_link_rate(outp->dp.lttpr.caps); + + if (rate && rate < max_rate) + max_rate = rate; + } + + max_rate = min_t(int, max_rate, outp->dcb->dpconf.link_bw); + + for (int i = 0; i < ARRAY_SIZE(rates); i++) { + if (rates[i] <= max_rate) { + outp->dp.rate[outp->dp.rate_nr].dpcd = -1; + outp->dp.rate[outp->dp.rate_nr].rate = rates[i]; + outp->dp.rate_nr++; + } + } + + if (WARN_ON(!outp->dp.rate_nr)) + goto out; + } + + ret = nvif_outp_dp_rates(&outp->outp, outp->dp.rate, outp->dp.rate_nr); + if (ret) + goto out; + + for (int i = 0; i < outp->dp.rate_nr; i++) { + u32 link_bw = outp->dp.rate[i].rate; + + if (link_bw > outp->dp.link_bw) + outp->dp.link_bw = link_bw; + } + ret = drm_dp_read_desc(aux, &outp->dp.desc, drm_dp_is_branch(dpcd)); if (ret < 0) goto out; @@ -151,39 +255,14 @@ nouveau_dp_detect(struct nouveau_connector *nv_connector, goto out; } - nv_encoder->dp.link_bw = 27000 * dpcd[DP_MAX_LINK_RATE]; - nv_encoder->dp.link_nr = - dpcd[DP_MAX_LANE_COUNT] & DP_MAX_LANE_COUNT_MASK; - - if (connector->connector_type == DRM_MODE_CONNECTOR_eDP && dpcd[DP_DPCD_REV] >= 0x13) { - struct drm_dp_aux *aux = &nv_connector->aux; - int ret, i; - u8 sink_rates[16]; - - ret = drm_dp_dpcd_read(aux, DP_SUPPORTED_LINK_RATES, sink_rates, sizeof(sink_rates)); - if (ret == sizeof(sink_rates)) { - for (i = 0; i < ARRAY_SIZE(sink_rates); i += 2) { - int val = ((sink_rates[i + 1] << 8) | sink_rates[i]) * 200 / 10; - if (val && (i == 0 || val > nv_encoder->dp.link_bw)) - nv_encoder->dp.link_bw = val; - } - } - } - - NV_DEBUG(drm, "display: %dx%d dpcd 0x%02x\n", - nv_encoder->dp.link_nr, nv_encoder->dp.link_bw, - dpcd[DP_DPCD_REV]); - NV_DEBUG(drm, "encoder: %dx%d\n", - nv_encoder->dcb->dpconf.link_nr, - nv_encoder->dcb->dpconf.link_bw); - - 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_DEBUG(drm, "sink dpcd version: 0x%02x\n", dpcd[DP_DPCD_REV]); + for (int i = 0; i < nv_encoder->dp.rate_nr; i++) + NV_DEBUG(drm, "sink rate %d: %d\n", i, nv_encoder->dp.rate[i].rate); - NV_DEBUG(drm, "maximum: %dx%d\n", - nv_encoder->dp.link_nr, nv_encoder->dp.link_bw); + NV_DEBUG(drm, "encoder: %dx%d\n", nv_encoder->dcb->dpconf.link_nr, + nv_encoder->dcb->dpconf.link_bw); + NV_DEBUG(drm, "maximum: %dx%d\n", nv_encoder->dp.link_nr, + nv_encoder->dp.link_bw); if (mstm && mstm->can_mst) { ret = nv50_mstm_detect(nv_encoder); diff --git a/drivers/gpu/drm/nouveau/nouveau_encoder.h b/drivers/gpu/drm/nouveau/nouveau_encoder.h index aacdf2814aba..123d0ecf5f58 100644 --- a/drivers/gpu/drm/nouveau/nouveau_encoder.h +++ b/drivers/gpu/drm/nouveau/nouveau_encoder.h @@ -75,6 +75,17 @@ struct nouveau_encoder { struct { struct nv50_mstm *mstm; + + struct { + u8 caps[DP_LTTPR_COMMON_CAP_SIZE]; + u8 nr; + } lttpr; + + u8 dpcd[DP_RECEIVER_CAP_SIZE]; + + struct nvif_outp_dp_rate rate[8]; + int rate_nr; + int link_nr; int link_bw; @@ -83,7 +94,6 @@ struct nouveau_encoder { */ struct mutex hpd_irq_lock; - u8 dpcd[DP_RECEIVER_CAP_SIZE]; u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS]; struct drm_dp_desc desc; diff --git a/drivers/gpu/drm/nouveau/nvif/outp.c b/drivers/gpu/drm/nouveau/nvif/outp.c index df6e89379982..050d5cd303ad 100644 --- a/drivers/gpu/drm/nouveau/nvif/outp.c +++ b/drivers/gpu/drm/nouveau/nvif/outp.c @@ -77,6 +77,27 @@ nvif_outp_acquire_dp(struct nvif_outp *outp, u8 dpcd[DP_RECEIVER_CAP_SIZE], } int +nvif_outp_dp_rates(struct nvif_outp *outp, struct nvif_outp_dp_rate *rate, int rate_nr) +{ + struct nvif_outp_dp_rates_v0 args; + int ret; + + if (rate_nr > ARRAY_SIZE(args.rate)) + return -EINVAL; + + args.version = 0; + args.rates = rate_nr; + for (int i = 0; i < args.rates; i++, rate++) { + args.rate[i].dpcd = rate->dpcd; + args.rate[i].rate = rate->rate; + } + + ret = nvif_object_mthd(&outp->object, NVIF_OUTP_V0_DP_RATES, &args, sizeof(args)); + NVIF_ERRON(ret, &outp->object, "[DP_RATES rates:%d]", args.rates); + return ret; +} + +int nvif_outp_dp_aux_xfer(struct nvif_outp *outp, u8 type, u8 *psize, u32 addr, u8 *data) { struct nvif_outp_dp_aux_xfer_v0 args; diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c index 49fbb32f5022..af0f81a2834b 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c @@ -615,48 +615,6 @@ done: return ret; } -static bool -nvkm_dp_enable_supported_link_rates(struct nvkm_outp *outp) -{ - u8 sink_rates[DPCD_RC10_SUPPORTED_LINK_RATES__SIZE]; - int i, j, k; - - if (outp->conn->info.type != DCB_CONNECTOR_eDP || - outp->dp.dpcd[DPCD_RC00_DPCD_REV] < 0x13 || - nvkm_rdaux(outp->dp.aux, DPCD_RC10_SUPPORTED_LINK_RATES(0), - sink_rates, sizeof(sink_rates))) - return false; - - for (i = 0; i < ARRAY_SIZE(sink_rates); i += 2) { - const u32 rate = ((sink_rates[i + 1] << 8) | sink_rates[i]) * 200 / 10; - - if (!rate || WARN_ON(outp->dp.rates == ARRAY_SIZE(outp->dp.rate))) - break; - - if (rate > outp->info.dpconf.link_bw * 27000) { - OUTP_DBG(outp, "rate %d !outp", rate); - continue; - } - - for (j = 0; j < outp->dp.rates; j++) { - if (rate > outp->dp.rate[j].rate) { - for (k = outp->dp.rates; k > j; k--) - outp->dp.rate[k] = outp->dp.rate[k - 1]; - break; - } - } - - outp->dp.rate[j].dpcd = i / 2; - outp->dp.rate[j].rate = rate; - outp->dp.rates++; - } - - for (i = 0; i < outp->dp.rates; i++) - OUTP_DBG(outp, "link_rate[%d] = %d", outp->dp.rate[i].dpcd, outp->dp.rate[i].rate); - - return outp->dp.rates != 0; -} - /* XXX: This is a big fat hack, and this is just drm_dp_read_dpcd_caps() * converted to work inside nvkm. This is a temporary holdover until we start * passing the drm_dp_aux device through NVKM @@ -757,34 +715,10 @@ nvkm_dp_enable(struct nvkm_outp *outp, bool auxpwr) } if (!nvkm_dp_read_dpcd_caps(outp)) { - const u8 rates[] = { 0x1e, 0x14, 0x0a, 0x06, 0 }; - const u8 *rate; - int rate_max; - - outp->dp.rates = 0; outp->dp.links = outp->dp.dpcd[DPCD_RC02] & DPCD_RC02_MAX_LANE_COUNT; outp->dp.links = min(outp->dp.links, outp->info.dpconf.link_nr); if (outp->dp.lttprs && outp->dp.lttpr[4]) outp->dp.links = min_t(int, outp->dp.links, outp->dp.lttpr[4]); - - rate_max = outp->dp.dpcd[DPCD_RC01_MAX_LINK_RATE]; - rate_max = min(rate_max, outp->info.dpconf.link_bw); - if (outp->dp.lttprs && outp->dp.lttpr[1]) - rate_max = min_t(int, rate_max, outp->dp.lttpr[1]); - - if (!nvkm_dp_enable_supported_link_rates(outp)) { - for (rate = rates; *rate; rate++) { - if (*rate > rate_max) - continue; - - if (WARN_ON(outp->dp.rates == ARRAY_SIZE(outp->dp.rate))) - break; - - outp->dp.rate[outp->dp.rates].dpcd = -1; - outp->dp.rate[outp->dp.rates].rate = *rate * 27000; - outp->dp.rates++; - } - } } } else if (!auxpwr && outp->dp.aux_pwr) { diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h index a2391b224ea4..5cef5933e7f2 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h @@ -108,6 +108,7 @@ struct nvkm_outp_func { struct { int (*aux_pwr)(struct nvkm_outp *, bool pu); int (*aux_xfer)(struct nvkm_outp *, u8 type, u32 addr, u8 *data, u8 *size); + int (*rates)(struct nvkm_outp *); } dp; }; diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c index cd92db9028a3..fd756e4599da 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c @@ -71,6 +71,29 @@ nvkm_uoutp_mthd_acquire_dp(struct nvkm_outp *outp, u8 dpcd[DP_RECEIVER_CAP_SIZE] } static int +nvkm_uoutp_mthd_dp_rates(struct nvkm_outp *outp, void *argv, u32 argc) +{ + union nvif_outp_dp_rates_args *args = argv; + + if (argc != sizeof(args->v0) || args->v0.version != 0) + return -ENOSYS; + if (args->v0.rates > ARRAY_SIZE(outp->dp.rate)) + return -EINVAL; + + for (int i = 0; i < args->v0.rates; i++) { + outp->dp.rate[i].dpcd = args->v0.rate[i].dpcd; + outp->dp.rate[i].rate = args->v0.rate[i].rate; + } + + outp->dp.rates = args->v0.rates; + + if (outp->func->dp.rates) + outp->func->dp.rates(outp); + + return 0; +} + +static int nvkm_uoutp_mthd_dp_aux_xfer(struct nvkm_outp *outp, void *argv, u32 argc) { union nvif_outp_dp_aux_xfer_args *args = argv; @@ -457,6 +480,7 @@ nvkm_uoutp_mthd_noacquire(struct nvkm_outp *outp, u32 mthd, void *argv, u32 argc case NVIF_OUTP_V0_BL_SET : return nvkm_uoutp_mthd_bl_set (outp, argv, argc); case NVIF_OUTP_V0_DP_AUX_PWR : return nvkm_uoutp_mthd_dp_aux_pwr (outp, argv, argc); case NVIF_OUTP_V0_DP_AUX_XFER: return nvkm_uoutp_mthd_dp_aux_xfer(outp, argv, argc); + case NVIF_OUTP_V0_DP_RATES : return nvkm_uoutp_mthd_dp_rates (outp, argv, argc); default: break; } |