[PATCH 02/13] drm/atomic: Update legacy DPMS state during modesets.

[Maarten Lankhorst]

Op 16-07-15 om 11:19 schreef Daniel Vetter:
> On Thu, Jul 16, 2015 at 10:59:15AM +0200, Maarten Lankhorst wrote:
>> This is required for DPMS to work correctly, during a modeset
>> the DPMS property should be turned off, unless the crtc
>> is made active in which case it should be set to DPMS on.
>>
>> Cc: dri-devel at lists.freedesktop.org
>> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
>> ---
>>  drivers/gpu/drm/drm_atomic_helper.c | 16 ++++++++++++++--
>>  1 file changed, 14 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
>> index 70e69904291d..cdec643971a2 100644
>> --- a/drivers/gpu/drm/drm_atomic_helper.c
>> +++ b/drivers/gpu/drm/drm_atomic_helper.c
>> @@ -642,6 +642,12 @@ drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
>>  
>>  	/* clear out existing links */
>>  	for_each_connector_in_state(old_state, connector, old_conn_state, i) {
>> +		struct drm_crtc *crtc = connector->state->crtc;
>> +
>> +		if (crtc &&
>> +		    drm_atomic_crtc_needs_modeset(crtc->state))
>> +			connector->dpms = DRM_MODE_DPMS_OFF;
> Same here, why only update when something changed? I already applied my
> patch from yesterday which updates this always (with Daniel Stone's r-b),
> does that one not work?
>
Not when in cloned mode.

2 connectors on same crtc.

Update dpms property to off connector 1, commit. update_legacy_modeset_state will reset it to DPMS_ON.
Update dpms property to off on connector 2, commit. update_legacy_modeset_state will reset it to DPMS_ON.

Expected result: DPMS on the screen is OFF
Actual result: ON with i915.