From 4874322e78d505d38c8d4481118af5c9f0e8306d Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Sat, 31 May 2014 01:48:06 +1000 Subject: [PATCH] drm/nouveau/dp: fix support for dpms SOR_PWR has no effect to power-off DP links, unlike other SOR protocols. Instead, on the source side, we cut power to the lanes after having put the sink into D3. Link training takes care of everything required to bring it back again. Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_connector.c | 39 +++++++++++++++++++-- drivers/gpu/drm/nouveau/nv50_display.c | 15 ++++++-- 2 files changed, 50 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 7535a8700fe9..7dac5e216799 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -76,7 +76,8 @@ find_encoder(struct drm_connector *connector, int type) continue; nv_encoder = nouveau_encoder(obj_to_encoder(obj)); - if (type == DCB_OUTPUT_ANY || nv_encoder->dcb->type == type) + if (type == DCB_OUTPUT_ANY || + (nv_encoder->dcb && nv_encoder->dcb->type == type)) return nv_encoder; } @@ -914,6 +915,40 @@ nouveau_connector_funcs_lvds = { .force = nouveau_connector_force }; +static void +nouveau_connector_dp_dpms(struct drm_connector *connector, int mode) +{ + struct nouveau_encoder *nv_encoder = NULL; + + if (connector->encoder) + nv_encoder = nouveau_encoder(connector->encoder); + if (nv_encoder && nv_encoder->dcb && + nv_encoder->dcb->type == DCB_OUTPUT_DP) { + if (mode == DRM_MODE_DPMS_ON) { + u8 data = DP_SET_POWER_D0; + nv_wraux(nv_encoder->i2c, DP_SET_POWER, &data, 1); + usleep_range(1000, 2000); + } else { + u8 data = DP_SET_POWER_D3; + nv_wraux(nv_encoder->i2c, DP_SET_POWER, &data, 1); + } + } + + drm_helper_connector_dpms(connector, mode); +} + +static const struct drm_connector_funcs +nouveau_connector_funcs_dp = { + .dpms = nouveau_connector_dp_dpms, + .save = NULL, + .restore = NULL, + .detect = nouveau_connector_detect, + .destroy = nouveau_connector_destroy, + .fill_modes = drm_helper_probe_single_connector_modes, + .set_property = nouveau_connector_set_property, + .force = nouveau_connector_force +}; + static void nouveau_connector_hotplug_work(struct work_struct *work) { @@ -1122,7 +1157,7 @@ nouveau_connector_create(struct drm_device *dev, int index) return ERR_PTR(ret); } - funcs = &nouveau_connector_funcs; + funcs = &nouveau_connector_funcs_dp; break; default: funcs = &nouveau_connector_funcs; diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c index 3c58854aff03..21c72480df82 100644 --- a/drivers/gpu/drm/nouveau/nv50_display.c +++ b/drivers/gpu/drm/nouveau/nv50_display.c @@ -26,6 +26,7 @@ #include #include +#include #include "nouveau_drm.h" #include "nouveau_dma.h" @@ -1722,7 +1723,7 @@ nv50_sor_dpms(struct drm_encoder *encoder, int mode) struct drm_device *dev = encoder->dev; struct nv50_disp *disp = nv50_disp(dev); struct drm_encoder *partner; - int or = nv_encoder->or; + u32 mthd; nv_encoder->last_dpms = mode; @@ -1740,7 +1741,17 @@ nv50_sor_dpms(struct drm_encoder *encoder, int mode) } } - nv_call(disp->core, NV50_DISP_SOR_PWR + or, (mode == DRM_MODE_DPMS_ON)); + mthd = (ffs(nv_encoder->dcb->sorconf.link) - 1) << 2; + mthd |= nv_encoder->or; + + if (nv_encoder->dcb->type == DCB_OUTPUT_DP) { + nv_call(disp->core, NV50_DISP_SOR_PWR | mthd, 1); + mthd |= NV94_DISP_SOR_DP_PWR; + } else { + mthd |= NV50_DISP_SOR_PWR; + } + + nv_call(disp->core, mthd, (mode == DRM_MODE_DPMS_ON)); } static bool -- 2.20.1