From: Lyude Paul Date: Wed, 17 Aug 2022 19:38:40 +0000 (-0400) Subject: drm/nouveau/kms: Cache DP encoders in nouveau_connector X-Git-Tag: v6.1-rc1~27^2~21^2~85 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=11d2738940ebeb3fd3abc78d44684d5edb400a6e;p=tomoyo%2Ftomoyo-test1.git drm/nouveau/kms: Cache DP encoders in nouveau_connector Post-NV50, the only kind of encoder you'll find for DP connectors on Nvidia GPUs are SORs (serial output resources). Because SORs have fixed associations with their connectors, we can correctly assume that any DP connector on a nvidia GPU will have exactly one SOR encoder routed to it for DisplayPort. Since we're going to need to be able to retrieve this fixed SOR DP encoder much more often as a result of hooking up MST helpers for tracking SST<->MST transitions in atomic states, let's simply cache this encoder in nouveau_connector for any DP connectors on the system to avoid looking it up each time. This isn't safe for NV50 since PIORs then come into play, however there's no code pre-NV50 that would need to look this up anyhow - so it's not really an issue. Signed-off-by: Lyude Paul Acked-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20220817193847.557945-12-lyude@redhat.com --- diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 8100c75ee731..b8ee2173ca8f 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -1368,7 +1368,7 @@ nouveau_connector_create(struct drm_device *dev, return ERR_PTR(-ENOMEM); } drm_dp_aux_init(&nv_connector->aux); - fallthrough; + break; default: funcs = &nouveau_connector_funcs; break; @@ -1431,6 +1431,8 @@ nouveau_connector_create(struct drm_device *dev, switch (type) { case DRM_MODE_CONNECTOR_DisplayPort: + nv_connector->dp_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP); + fallthrough; case DRM_MODE_CONNECTOR_eDP: drm_dp_cec_register_connector(&nv_connector->aux, connector); break; diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.h b/drivers/gpu/drm/nouveau/nouveau_connector.h index 4bf0c703eee7..f4e17ff68bf9 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.h +++ b/drivers/gpu/drm/nouveau/nouveau_connector.h @@ -128,6 +128,9 @@ struct nouveau_connector { struct drm_dp_aux aux; + /* The fixed DP encoder for this connector, if there is one */ + struct nouveau_encoder *dp_encoder; + int dithering_mode; int scaling_mode;