On Wed, Jul 26, 2017 at 10:56:33PM +0200, Takashi Iwai wrote:
> The bochs drm driver doesn't treat with DPMS, so we should return an
> error from the connector dpms callback so that the fbcon can fall back
> to the generic blank mode.
>
> Signed-off-by: Takashi Iwai <ti...@suse.de>
> ---
> drivers/gpu/drm/bochs/bochs_kms.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bochs/bochs_kms.c
> b/drivers/gpu/drm/bochs/bochs_kms.c
> index 6a91e62da2f4..a60d1a05950f 100644
> --- a/drivers/gpu/drm/bochs/bochs_kms.c
> +++ b/drivers/gpu/drm/bochs/bochs_kms.c
> @@ -217,6 +217,13 @@ bochs_connector_best_encoder(struct drm_connector
> *connector)
> return NULL;
> }
>
> +static int bochs_connector_dpms(struct drm_connector *connector, int mode)
> +{
> + drm_helper_connector_dpms(connector, mode);
> + /* FIXME: return error to make fbcon generic blank working */
> + return -EINVAL;
Thought about this some more, disabling the screen and return -EINVAL (to
userspace even) feels like rather bad semantics. Could we just do an
-EINVAL instead?
I thought the DPMS off change doesn't do anything anyway, so this is pure
dead code.
-Daniel
> +}
> +
> static const struct drm_connector_helper_funcs
> bochs_connector_connector_helper_funcs = {
> .get_modes = bochs_connector_get_modes,
> .mode_valid = bochs_connector_mode_valid,
> @@ -224,7 +231,7 @@ static const struct drm_connector_helper_funcs
> bochs_connector_connector_helper_
> };
>
> static const struct drm_connector_funcs bochs_connector_connector_funcs = {
> - .dpms = drm_helper_connector_dpms,
> + .dpms = bochs_connector_dpms,
> .fill_modes = drm_helper_probe_single_connector_modes,
> .destroy = drm_connector_cleanup,
> };
> --
> 2.13.3
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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