2021-04-23 18:45:02

by Lyude Paul

Subject: [PATCH v4 02/17] drm/nouveau/kms/nv50-: Move AUX adapter reg to connector late register/early unregister

Since AUX adapters on nouveau have their respective DRM connectors as
parents, we need to make sure that we register then after their connectors.

Signed-off-by: Lyude Paul <[email protected]>
---
drivers/gpu/drm/nouveau/nouveau_connector.c | 25 ++++++++++++++++-----
1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 61e6d7412505..c04044be3d32 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -401,7 +401,6 @@ nouveau_connector_destroy(struct drm_connector *connector)
drm_connector_cleanup(connector);
if (nv_connector->aux.transfer) {
drm_dp_cec_unregister_connector(&nv_connector->aux);
- drm_dp_aux_unregister(&nv_connector->aux);
kfree(nv_connector->aux.name);
}
kfree(connector);
@@ -905,13 +904,29 @@ nouveau_connector_late_register(struct drm_connector *connector)
int ret;

ret = nouveau_backlight_init(connector);
+ if (ret)
+ return ret;

+ if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
+ connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+ ret = drm_dp_aux_register(&nouveau_connector(connector)->aux);
+ if (ret)
+ goto backlight_fini;
+ }
+
+ return 0;
+backlight_fini:
+ nouveau_backlight_fini(connector);
return ret;
}

static void
nouveau_connector_early_unregister(struct drm_connector *connector)
{
+ if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
+ connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)
+ drm_dp_aux_unregister(&nouveau_connector(connector)->aux);
+
nouveau_backlight_fini(connector);
}

@@ -1343,14 +1358,14 @@ nouveau_connector_create(struct drm_device *dev,
snprintf(aux_name, sizeof(aux_name), "sor-%04x-%04x",
dcbe->hasht, dcbe->hashm);
nv_connector->aux.name = kstrdup(aux_name, GFP_KERNEL);
- ret = drm_dp_aux_register(&nv_connector->aux);
+ drm_dp_aux_init(&nv_connector->aux);
if (ret) {
- NV_ERROR(drm, "failed to register aux channel\n");
+ NV_ERROR(drm, "Failed to init AUX adapter for sor-%04x-%04x: %d\n",
+ dcbe->hasht, dcbe->hashm, ret);
kfree(nv_connector);
return ERR_PTR(ret);
}
- funcs = &nouveau_connector_funcs;
- break;
+ fallthrough;
default:
funcs = &nouveau_connector_funcs;
break;
--
2.30.2

2021-04-23 21:11:35

by Ilia Mirkin

Subject: Re: [Nouveau] [PATCH v4 02/17] drm/nouveau/kms/nv50-: Move AUX adapter reg to connector late register/early unregister

Some trivia, no comment on the real logic of the changes:

On Fri, Apr 23, 2021 at 2:43 PM Lyude Paul <[email protected]> wrote:
>
> Since AUX adapters on nouveau have their respective DRM connectors as
> parents, we need to make sure that we register then after their connectors.

then -> them

>
> Signed-off-by: Lyude Paul <[email protected]>
> ---
> drivers/gpu/drm/nouveau/nouveau_connector.c | 25 ++++++++++++++++-----
> 1 file changed, 20 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
> index 61e6d7412505..c04044be3d32 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_connector.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
> @@ -401,7 +401,6 @@ nouveau_connector_destroy(struct drm_connector *connector)
> drm_connector_cleanup(connector);
> if (nv_connector->aux.transfer) {
> drm_dp_cec_unregister_connector(&nv_connector->aux);
> - drm_dp_aux_unregister(&nv_connector->aux);
> kfree(nv_connector->aux.name);
> }
> kfree(connector);
> @@ -905,13 +904,29 @@ nouveau_connector_late_register(struct drm_connector *connector)
> int ret;
>
> ret = nouveau_backlight_init(connector);
> + if (ret)
> + return ret;
>
> + if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
> + connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
> + ret = drm_dp_aux_register(&nouveau_connector(connector)->aux);
> + if (ret)
> + goto backlight_fini;
> + }
> +
> + return 0;
> +backlight_fini:
> + nouveau_backlight_fini(connector);
> return ret;
> }
>
> static void
> nouveau_connector_early_unregister(struct drm_connector *connector)
> {
> + if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
> + connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)
> + drm_dp_aux_unregister(&nouveau_connector(connector)->aux);
> +
> nouveau_backlight_fini(connector);
> }
>
> @@ -1343,14 +1358,14 @@ nouveau_connector_create(struct drm_device *dev,
> snprintf(aux_name, sizeof(aux_name), "sor-%04x-%04x",
> dcbe->hasht, dcbe->hashm);
> nv_connector->aux.name = kstrdup(aux_name, GFP_KERNEL);
> - ret = drm_dp_aux_register(&nv_connector->aux);
> + drm_dp_aux_init(&nv_connector->aux);
> if (ret) {
> - NV_ERROR(drm, "failed to register aux channel\n");
> + NV_ERROR(drm, "Failed to init AUX adapter for sor-%04x-%04x: %d\n",

Maybe just use aux_name instead of rebuilding the string again?

> + dcbe->hasht, dcbe->hashm, ret);
> kfree(nv_connector);
> return ERR_PTR(ret);
> }
> - funcs = &nouveau_connector_funcs;
> - break;
> + fallthrough;
> default:
> funcs = &nouveau_connector_funcs;
> break;
> --
> 2.30.2
>
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