From 8777c5c11764d8336d8270f96778158c34c92108 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Fri, 6 Jun 2014 18:09:55 +1000 Subject: [PATCH] drm/nouveau/dp: probe dpcd to determine connectedness Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_connector.c | 48 ++++++++++++----------------- drivers/gpu/drm/nouveau/nouveau_dp.c | 14 ++++----- drivers/gpu/drm/nouveau/nouveau_encoder.h | 4 +-- 3 files changed, 26 insertions(+), 40 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 7dac5e2..1fa222e 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -111,15 +111,15 @@ nouveau_connector_destroy(struct drm_connector *connector) kfree(connector); } -static struct nouveau_i2c_port * -nouveau_connector_ddc_detect(struct drm_connector *connector, - struct nouveau_encoder **pnv_encoder) +static struct nouveau_encoder * +nouveau_connector_ddc_detect(struct drm_connector *connector) { struct drm_device *dev = connector->dev; struct nouveau_connector *nv_connector = nouveau_connector(connector); struct nouveau_drm *drm = nouveau_drm(dev); struct nouveau_gpio *gpio = nouveau_gpio(drm->device); - struct nouveau_i2c_port *port = NULL; + struct nouveau_encoder *nv_encoder; + struct drm_mode_object *obj; int i, panel = -ENODEV; /* eDP panels need powering on by us (if the VBIOS doesn't default it @@ -134,13 +134,9 @@ nouveau_connector_ddc_detect(struct drm_connector *connector, } } - for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { - struct nouveau_encoder *nv_encoder; - struct drm_mode_object *obj; - int id; - - id = connector->encoder_ids[i]; - if (!id) + for (i = 0; nv_encoder = NULL, i < DRM_CONNECTOR_MAX_ENCODER; i++) { + int id = connector->encoder_ids[i]; + if (id == 0) break; obj = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_ENCODER); @@ -148,22 +144,24 @@ nouveau_connector_ddc_detect(struct drm_connector *connector, continue; nv_encoder = nouveau_encoder(obj_to_encoder(obj)); - port = nv_encoder->i2c; - if (port && nv_probe_i2c(port, 0x50)) { - *pnv_encoder = nv_encoder; - break; + if (nv_encoder->dcb->type == DCB_OUTPUT_DP) { + int ret = nouveau_dp_detect(nv_encoder); + if (ret == 0) + break; + } else + if (nv_encoder->i2c) { + if (nv_probe_i2c(nv_encoder->i2c, 0x50)) + break; } - - port = NULL; } /* eDP panel not detected, restore panel power GPIO to previous * state to avoid confusing the SOR for other output types. */ - if (!port && panel == 0) + if (!nv_encoder && panel == 0) gpio->set(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff, panel); - return port; + return nv_encoder; } static struct nouveau_encoder * @@ -262,8 +260,8 @@ nouveau_connector_detect(struct drm_connector *connector, bool force) if (ret < 0 && ret != -EACCES) return conn_status; - i2c = nouveau_connector_ddc_detect(connector, &nv_encoder); - if (i2c) { + nv_encoder = nouveau_connector_ddc_detect(connector); + if (nv_encoder && (i2c = nv_encoder->i2c) != NULL) { nv_connector->edid = drm_get_edid(connector, &i2c->adapter); drm_mode_connector_update_edid_property(connector, nv_connector->edid); @@ -273,14 +271,6 @@ nouveau_connector_detect(struct drm_connector *connector, bool force) goto detect_analog; } - if (nv_encoder->dcb->type == DCB_OUTPUT_DP && - !nouveau_dp_detect(to_drm_encoder(nv_encoder))) { - NV_ERROR(drm, "Detected %s, but failed init\n", - connector->name); - conn_status = connector_status_disconnected; - goto out; - } - /* Override encoder type for DVI-I based on whether EDID * says the display is digital or analog, both use the * same i2c channel so the value returned from ddc_detect diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c index 36fd225..5675ffc 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dp.c +++ b/drivers/gpu/drm/nouveau/nouveau_dp.c @@ -55,11 +55,10 @@ nouveau_dp_probe_oui(struct drm_device *dev, struct nouveau_i2c_port *auxch, } -bool -nouveau_dp_detect(struct drm_encoder *encoder) +int +nouveau_dp_detect(struct nouveau_encoder *nv_encoder) { - struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder); - struct drm_device *dev = encoder->dev; + struct drm_device *dev = nv_encoder->base.base.dev; struct nouveau_drm *drm = nouveau_drm(dev); struct nouveau_i2c_port *auxch; u8 *dpcd = nv_encoder->dp.dpcd; @@ -67,11 +66,11 @@ nouveau_dp_detect(struct drm_encoder *encoder) auxch = nv_encoder->i2c; if (!auxch) - return false; + return -ENODEV; ret = nv_rdaux(auxch, DP_DPCD_REV, dpcd, 8); if (ret) - return false; + return ret; nv_encoder->dp.link_bw = 27000 * dpcd[1]; nv_encoder->dp.link_nr = dpcd[2] & DP_MAX_LANE_COUNT_MASK; @@ -91,6 +90,5 @@ nouveau_dp_detect(struct drm_encoder *encoder) nv_encoder->dp.link_nr, nv_encoder->dp.link_bw); nouveau_dp_probe_oui(dev, auxch, dpcd); - - return true; + return 0; } diff --git a/drivers/gpu/drm/nouveau/nouveau_encoder.h b/drivers/gpu/drm/nouveau/nouveau_encoder.h index fcf89c8..5f0e37f 100644 --- a/drivers/gpu/drm/nouveau/nouveau_encoder.h +++ b/drivers/gpu/drm/nouveau/nouveau_encoder.h @@ -85,9 +85,7 @@ get_slave_funcs(struct drm_encoder *enc) } /* nouveau_dp.c */ -bool nouveau_dp_detect(struct drm_encoder *); -void nouveau_dp_dpms(struct drm_encoder *, int mode, u32 datarate, - struct nouveau_object *); +int nouveau_dp_detect(struct nouveau_encoder *); struct nouveau_connector * nouveau_encoder_connector_get(struct nouveau_encoder *encoder); -- 2.7.4