Re: [PATCH 1/3] drm/i915: Convert intel_tv connector properties to atomic, v3.

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

Op 16-03-17 om 11:48 schreef Daniel Vetter:
> On Wed, Mar 15, 2017 at 11:08:56AM +0100, Maarten Lankhorst wrote:
>> As a proof of concept, first try to convert intel_tv, which is a rarely
>> used connector. It has 5 properties, tv format and 4 margins.
>>
>> I'm less certain about the state behavior itself, should we pass a size
>> parameter to intel_connector_alloc instead, so duplicate_state
>> can be done globally if it can be blindly copied?
>>
>> Can we also have a atomic_check function for connectors, so the
>> crtc_state->connectors_changed can be set there? It would be cleaner
>> and more atomic-like.
>>
>> To match the legacy behavior, format can be changed by probing just like
>> in legacy mode.
>>
>> Changes since v1:
>> - Add intel_encoder->swap_state to allow updating connector state.
>> - Add intel_tv->format for detect_mode and mode_valid, updated on atomic commit.
>> Changes since v2:
>> - Fix typo in tv_choose_preferred modes function name.
>> - Assignment of tv properties is done in core, so intel_tv only needs
>>   a atomic_check function. Thanks Ville!
>>
>> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
>> ---
>>  drivers/gpu/drm/i915/intel_display.c |  15 +++
>>  drivers/gpu/drm/i915/intel_drv.h     |   4 +
>>  drivers/gpu/drm/i915/intel_tv.c      | 200 ++++++++++++++++-------------------
>>  3 files changed, 110 insertions(+), 109 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>> index ac25c9bc8b81..18b7e7546ee1 100644
>> --- a/drivers/gpu/drm/i915/intel_display.c
>> +++ b/drivers/gpu/drm/i915/intel_display.c
>> @@ -12954,6 +12954,20 @@ static void intel_atomic_track_fbs(struct drm_atomic_state *state)
>>  				  to_intel_plane(plane)->frontbuffer_bit);
>>  }
>>  
>> +static void swap_connector_state(struct drm_atomic_state *state)
>> +{
>> +	struct drm_connector *connector;
>> +	struct drm_connector_state *new_conn_state;
>> +	int i;
>> +
>> +	for_each_new_connector_in_state(state, connector, new_conn_state, i) {
>> +		struct intel_connector *conn = to_intel_connector(connector);
>> +
>> +		if (conn->swap_state)
>> +			conn->swap_state(conn, new_conn_state);
>> +	}
>> +}
> So yeah I'm late, but this is pretty much exactly what DK's private state
> object stuff was meant for. Have you looked into rebasing on top of that?
> I think hand-rolling private state stuff everywhere isn't really good.
>
> Afaics DK's patch series is ready for merging into drm-misc, so shouldn't
> end up blocking you.
This swap_state hook is used for connector state. We could probably add a swap_state hook that drivers
can use for this in the core, but the connector state is already part of the state, adding it twice is silly.

Instead, would adding a hook to the core be useful?

~Maarten
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