From 4a2cb4181b077cf028c955d1f61d9244b2e93263 Mon Sep 17 00:00:00 2001 From: Lyude Paul Date: Mon, 11 May 2020 18:41:24 -0400 Subject: drm/nouveau/kms/nv50-: Probe SOR and PIOR caps for DP interlacing support Right now, we make the mistake of allowing interlacing on all connectors. Nvidia hardware does not always support interlacing with DP though, so we need to make sure that we don't allow interlaced modes to be set in such situations as otherwise we'll end up accidentally hanging the display HW. This fixes some hangs with Turing, which would be caused by attempting to set an interlaced mode on hardware that doesn't support it. This patch likely fixes other hardware hanging in the same way as well. Note that we say we probe PIOR caps, but they don't actually have any interlacing caps. So, the get_caps() function for PIORs just sets interlacing support to true. Changes since v1: * Actually probe caps correctly this time, both on EVO and NVDisplay. Changes since v2: * Fix probing for < GF119 * Use vfunc table, in prep for adding more caps in the future. Signed-off-by: Lyude Paul Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_connector.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/nouveau/nouveau_connector.c') diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 9a9a7f5003d3..6dae00da5d7e 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -509,7 +509,11 @@ nouveau_connector_set_encoder(struct drm_connector *connector, nv_connector->detected_encoder = nv_encoder; if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) { - connector->interlace_allowed = true; + if (nv_encoder->dcb->type == DCB_OUTPUT_DP) + connector->interlace_allowed = + nv_encoder->caps.dp_interlace; + else + connector->interlace_allowed = true; connector->doublescan_allowed = true; } else if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS || @@ -1060,6 +1064,10 @@ nouveau_connector_mode_valid(struct drm_connector *connector, case DCB_OUTPUT_TV: return get_slave_funcs(encoder)->mode_valid(encoder, mode); case DCB_OUTPUT_DP: + if (mode->flags & DRM_MODE_FLAG_INTERLACE && + !nv_encoder->caps.dp_interlace) + return MODE_NO_INTERLACE; + max_clock = nv_encoder->dp.link_nr; max_clock *= nv_encoder->dp.link_bw; clock = clock * (connector->display_info.bpc * 3) / 10; -- cgit v1.2.3 From d6a9efece7248d3cbd7bf65d3a8325e8e5dceec0 Mon Sep 17 00:00:00 2001 From: Lyude Paul Date: Mon, 11 May 2020 18:41:27 -0400 Subject: drm/nouveau/kms/nv50-: Share DP SST mode_valid() handling with MST Currently, the nv50_mstc_mode_valid() function is happy to take any and all modes, even the ones we can't actually support sometimes like interlaced modes. Luckily, the only difference between the mode validation that needs to be performed for MST vs. SST is that eventually we'll need to check the minimum PBN against the MSTB's full PBN capabilities (remember-we don't care about the current bw state here). Otherwise, all of the other code can be shared. So, we move all of the common mode validation in nouveau_connector_mode_valid() into a separate helper, nv50_dp_mode_valid(), and use that from both nv50_mstc_mode_valid() and nouveau_connector_mode_valid(). Note that we allow for returning the calculated clock that nv50_dp_mode_valid() came up with, since we'll eventually want to use that for PBN calculation in nv50_mstc_mode_valid(). Signed-off-by: Lyude Paul Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/dispnv50/disp.c | 9 +++++- drivers/gpu/drm/nouveau/nouveau_connector.c | 46 +++++++++++++++++------------ drivers/gpu/drm/nouveau/nouveau_connector.h | 5 ++++ drivers/gpu/drm/nouveau/nouveau_dp.c | 31 +++++++++++++++++++ drivers/gpu/drm/nouveau/nouveau_encoder.h | 4 +++ 5 files changed, 75 insertions(+), 20 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nouveau_connector.c') diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c index ae2c90868caf..8d60252e5583 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -1056,7 +1056,14 @@ static enum drm_mode_status nv50_mstc_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { - return MODE_OK; + struct nv50_mstc *mstc = nv50_mstc(connector); + struct nouveau_encoder *outp = mstc->mstm->outp; + + /* TODO: calculate the PBN from the dotclock and validate against the + * MSTB's max possible PBN + */ + + return nv50_dp_mode_valid(connector, outp, mode, NULL); } static int diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 6dae00da5d7e..1b383ae0248f 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -38,6 +38,7 @@ #include "nouveau_reg.h" #include "nouveau_drv.h" #include "dispnv04/hw.h" +#include "dispnv50/disp.h" #include "nouveau_acpi.h" #include "nouveau_display.h" @@ -1033,6 +1034,29 @@ get_tmds_link_bandwidth(struct drm_connector *connector) return 112000 * duallink_scale; } +enum drm_mode_status +nouveau_conn_mode_clock_valid(const struct drm_display_mode *mode, + const unsigned min_clock, + const unsigned max_clock, + unsigned int *clock_out) +{ + unsigned int clock = mode->clock; + + if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == + DRM_MODE_FLAG_3D_FRAME_PACKING) + clock *= 2; + + if (clock < min_clock) + return MODE_CLOCK_LOW; + if (clock > max_clock) + return MODE_CLOCK_HIGH; + + if (clock_out) + *clock_out = clock; + + return MODE_OK; +} + static enum drm_mode_status nouveau_connector_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) @@ -1041,7 +1065,6 @@ nouveau_connector_mode_valid(struct drm_connector *connector, struct nouveau_encoder *nv_encoder = nv_connector->detected_encoder; struct drm_encoder *encoder = to_drm_encoder(nv_encoder); unsigned min_clock = 25000, max_clock = min_clock; - unsigned clock = mode->clock; switch (nv_encoder->dcb->type) { case DCB_OUTPUT_LVDS: @@ -1064,29 +1087,14 @@ nouveau_connector_mode_valid(struct drm_connector *connector, case DCB_OUTPUT_TV: return get_slave_funcs(encoder)->mode_valid(encoder, mode); case DCB_OUTPUT_DP: - if (mode->flags & DRM_MODE_FLAG_INTERLACE && - !nv_encoder->caps.dp_interlace) - return MODE_NO_INTERLACE; - - max_clock = nv_encoder->dp.link_nr; - max_clock *= nv_encoder->dp.link_bw; - clock = clock * (connector->display_info.bpc * 3) / 10; - break; + return nv50_dp_mode_valid(connector, nv_encoder, mode, NULL); default: BUG(); return MODE_BAD; } - if ((mode->flags & DRM_MODE_FLAG_3D_MASK) == DRM_MODE_FLAG_3D_FRAME_PACKING) - clock *= 2; - - if (clock < min_clock) - return MODE_CLOCK_LOW; - - if (clock > max_clock) - return MODE_CLOCK_HIGH; - - return MODE_OK; + return nouveau_conn_mode_clock_valid(mode, min_clock, max_clock, + NULL); } static struct drm_encoder * diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.h b/drivers/gpu/drm/nouveau/nouveau_connector.h index de84fb4708c7..9e062c7adec8 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.h +++ b/drivers/gpu/drm/nouveau/nouveau_connector.h @@ -195,6 +195,11 @@ int nouveau_conn_atomic_get_property(struct drm_connector *, const struct drm_connector_state *, struct drm_property *, u64 *); struct drm_display_mode *nouveau_conn_native_mode(struct drm_connector *); +enum drm_mode_status +nouveau_conn_mode_clock_valid(const struct drm_display_mode *, + const unsigned min_clock, + const unsigned max_clock, + unsigned *clock); #ifdef CONFIG_DRM_NOUVEAU_BACKLIGHT extern int nouveau_backlight_init(struct drm_connector *); diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c index 2674f1587457..8a0f7994e1ae 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dp.c +++ b/drivers/gpu/drm/nouveau/nouveau_dp.c @@ -98,3 +98,34 @@ nouveau_dp_detect(struct nouveau_encoder *nv_encoder) return NOUVEAU_DP_SST; return ret; } + +/* TODO: + * - Use the minimum possible BPC here, once we add support for the max bpc + * property. + * - Validate the mode against downstream port caps (see + * drm_dp_downstream_max_clock()) + * - Validate against the DP caps advertised by the GPU (we don't check these + * yet) + */ +enum drm_mode_status +nv50_dp_mode_valid(struct drm_connector *connector, + struct nouveau_encoder *outp, + const struct drm_display_mode *mode, + unsigned *out_clock) +{ + const unsigned min_clock = 25000; + unsigned max_clock, clock; + enum drm_mode_status ret; + + if (mode->flags & DRM_MODE_FLAG_INTERLACE && !outp->caps.dp_interlace) + return MODE_NO_INTERLACE; + + max_clock = outp->dp.link_nr * outp->dp.link_bw; + clock = mode->clock * (connector->display_info.bpc * 3) / 10; + + ret = nouveau_conn_mode_clock_valid(mode, min_clock, max_clock, + &clock); + if (out_clock) + *out_clock = clock; + return ret; +} diff --git a/drivers/gpu/drm/nouveau/nouveau_encoder.h b/drivers/gpu/drm/nouveau/nouveau_encoder.h index 3217f587eceb..de51733b0476 100644 --- a/drivers/gpu/drm/nouveau/nouveau_encoder.h +++ b/drivers/gpu/drm/nouveau/nouveau_encoder.h @@ -104,6 +104,10 @@ enum nouveau_dp_status { }; int nouveau_dp_detect(struct nouveau_encoder *); +enum drm_mode_status nv50_dp_mode_valid(struct drm_connector *, + struct nouveau_encoder *, + const struct drm_display_mode *, + unsigned *clock); struct nouveau_connector * nouveau_encoder_connector_get(struct nouveau_encoder *encoder); -- cgit v1.2.3