Op 18-11-16 om 08:13 schreef Manasi Navare:
> CRTC state connector_changed needs to be set to true
> if connector link status property has changed. This will tell the
> driver to do a complete modeset due to change in connector property.
>
> Acked-by: Harry Wentland <harry.wentland@xxxxxxx>
> Acked-by: Tony Cheng <tony.cheng@xxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
> Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_atomic_helper.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 0b16587..2125fd1 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -519,6 +519,13 @@ static int handle_conflicting_encoders(struct drm_atomic_state *state,
> connector_state);
> if (ret)
> return ret;
> +
> + if (connector->state->crtc) {
> + crtc_state = drm_atomic_get_existing_crtc_state(state,
> + connector->state->crtc);
> + if (connector->link_status == DRM_MODE_LINK_STATUS_BAD)
> + crtc_state->connectors_changed = true;
> + }
> }
>
> /*
This will cause ordinary atomic commits that happen to change connector flags to potentially fail with -EINVAL if ALLOW_MODESET is not set.
For this reason I'm not sure this flag should be set automatically by the kernel. Could we add add a retrain link property instead, that
always return 0 when queried, but writing a 1 causing connectors_changed to be set on bad link status?
~Maarten
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