Nouveau - May 2019 - [PATCH v3 04/10] drm: Convert connector_helper_funcs->atomic_check to accept drm_atomic_state

On Sat, May 11, 2019 at 10:12:02PM +0300, Laurent Pinchart
wrote:
> Hi Sean,
> 
> Thank you for the patch.
> 
> On Thu, May 02, 2019 at 03:49:46PM -0400, Sean Paul wrote:
> > From: Sean Paul <seanpaul at chromium.org>
> > 
> > Everyone who implements connector_helper_funcs->atomic_check
reaches
> > into the connector state to get the atomic state. Instead of
continuing
> > this pattern, change the callback signature to just give atomic state
> > and let the driver determine what it does and does not need from it.
> > 
> > Eventually all atomic functions should do this, but that's just
too much
> > busy work for me.
> 
> Given that drivers also access the connector state, isn't this slightly
> more inefficient ?
It's atomic code, we're trying to optimize for clean code at the expense
of a bit of runtime overhead due to more pointer chasing. And I agree with
the general push, the pile of old/new_state pointers of various objects
we're passing around is confusing. Passing the overall drm_atomic_state
seems much more reasonable, and with that we can get everything else. Plus
it's much more obvious whether you have the old/new state (since that's
explicit when you look it up from the drm_atomic_state).

If we ever see this show up in profile, and it starts mattering, first
thing we need is a hashtable I think (atm it's list walking, which is just
terrible). But thus far no one cares.
-Daniel
> 
> > Changes in v3:
> > - Added to the set
> > 
> > Cc: Daniel Vetter <daniel at ffwll.ch>
> > Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > Cc: Jani Nikula <jani.nikula at linux.intel.com>
> > Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> > Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > Cc: Ben Skeggs <bskeggs at redhat.com>
> > Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> > Cc: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>
> > Cc: Eric Anholt <eric at anholt.net>
> > Signed-off-by: Sean Paul <seanpaul at chromium.org>
> > ---
> >  drivers/gpu/drm/drm_atomic_helper.c      |  4 ++--
> >  drivers/gpu/drm/i915/intel_atomic.c      |  8 +++++---
> >  drivers/gpu/drm/i915/intel_dp_mst.c      |  7 ++++---
> >  drivers/gpu/drm/i915/intel_drv.h         |  2 +-
> >  drivers/gpu/drm/i915/intel_sdvo.c        |  9 +++++----
> >  drivers/gpu/drm/i915/intel_tv.c          |  8 +++++---
> >  drivers/gpu/drm/nouveau/dispnv50/disp.c  |  5 +++--
> >  drivers/gpu/drm/rcar-du/rcar_lvds.c      | 12 +++++++-----
> >  drivers/gpu/drm/vc4/vc4_txp.c            |  7 ++++---
> >  include/drm/drm_modeset_helper_vtables.h |  2 +-
> >  10 files changed, 37 insertions(+), 27 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/drm_atomic_helper.c
b/drivers/gpu/drm/drm_atomic_helper.c
> > index 9d9e47276839..fa5a367507c1 100644
> > --- a/drivers/gpu/drm/drm_atomic_helper.c
> > +++ b/drivers/gpu/drm/drm_atomic_helper.c
> > @@ -683,7 +683,7 @@ drm_atomic_helper_check_modeset(struct drm_device
*dev,
> >  		}
> >  
> >  		if (funcs->atomic_check)
> > -			ret = funcs->atomic_check(connector, new_connector_state);
> > +			ret = funcs->atomic_check(connector, state);
> >  		if (ret)
> >  			return ret;
> >  
> > @@ -725,7 +725,7 @@ drm_atomic_helper_check_modeset(struct drm_device
*dev,
> >  			continue;
> >  
> >  		if (funcs->atomic_check)
> > -			ret = funcs->atomic_check(connector, new_connector_state);
> > +			ret = funcs->atomic_check(connector, state);
> >  		if (ret)
> >  			return ret;
> >  	}
> > diff --git a/drivers/gpu/drm/i915/intel_atomic.c
b/drivers/gpu/drm/i915/intel_atomic.c
> > index b844e8840c6f..e8a5b82e9242 100644
> > --- a/drivers/gpu/drm/i915/intel_atomic.c
> > +++ b/drivers/gpu/drm/i915/intel_atomic.c
> > @@ -103,12 +103,14 @@ int
intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> >  }
> >  
> >  int intel_digital_connector_atomic_check(struct drm_connector *conn,
> > -					 struct drm_connector_state *new_state)
> > +					 struct drm_atomic_state *state)
> >  {
> > +	struct drm_connector_state *new_state > > +	
drm_atomic_get_new_connector_state(state, conn);
> >  	struct intel_digital_connector_state *new_conn_state > >  	
to_intel_digital_connector_state(new_state);
> >  	struct drm_connector_state *old_state > > -	
drm_atomic_get_old_connector_state(new_state->state, conn);
> > +		drm_atomic_get_old_connector_state(state, conn);
> >  	struct intel_digital_connector_state *old_conn_state > >  	
to_intel_digital_connector_state(old_state);
> >  	struct drm_crtc_state *crtc_state;
> > @@ -118,7 +120,7 @@ int intel_digital_connector_atomic_check(struct
drm_connector *conn,
> >  	if (!new_state->crtc)
> >  		return 0;
> >  
> > -	crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
new_state->crtc);
> > +	crtc_state = drm_atomic_get_new_crtc_state(state,
new_state->crtc);
> >  
> >  	/*
> >  	 * These properties are handled by fastset, and might not end
> > diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c
b/drivers/gpu/drm/i915/intel_dp_mst.c
> > index 19d81cef2ab6..89cfec128ba0 100644
> > --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> > +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> > @@ -143,9 +143,10 @@ static int intel_dp_mst_compute_config(struct
intel_encoder *encoder,
> >  
> >  static int
> >  intel_dp_mst_atomic_check(struct drm_connector *connector,
> > -			  struct drm_connector_state *new_conn_state)
> > +			  struct drm_atomic_state *state)
> >  {
> > -	struct drm_atomic_state *state = new_conn_state->state;
> > +	struct drm_connector_state *new_conn_state > > +	
drm_atomic_get_new_connector_state(state, connector);
> >  	struct drm_connector_state *old_conn_state > >  	
drm_atomic_get_old_connector_state(state, connector);
> >  	struct intel_connector *intel_connector > > @@ -155,7 +156,7
@@ intel_dp_mst_atomic_check(struct drm_connector *connector,
> >  	struct drm_dp_mst_topology_mgr *mgr;
> >  	int ret;
> >  
> > -	ret = intel_digital_connector_atomic_check(connector,
new_conn_state);
> > +	ret = intel_digital_connector_atomic_check(connector, state);
> >  	if (ret)
> >  		return ret;
> >  
> > diff --git a/drivers/gpu/drm/i915/intel_drv.h
b/drivers/gpu/drm/i915/intel_drv.h
> > index f8c7b291fdc3..88571b8e8d62 100644
> > --- a/drivers/gpu/drm/i915/intel_drv.h
> > +++ b/drivers/gpu/drm/i915/intel_drv.h
> > @@ -2481,7 +2481,7 @@ int
intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> >  						struct drm_property *property,
> >  						u64 val);
> >  int intel_digital_connector_atomic_check(struct drm_connector *conn,
> > -					 struct drm_connector_state *new_state);
> > +					 struct drm_atomic_state *state);
> >  struct drm_connector_state *
> >  intel_digital_connector_duplicate_state(struct drm_connector
*connector);
> >  
> > diff --git a/drivers/gpu/drm/i915/intel_sdvo.c
b/drivers/gpu/drm/i915/intel_sdvo.c
> > index 68f497493d43..72ea164b971c 100644
> > --- a/drivers/gpu/drm/i915/intel_sdvo.c
> > +++ b/drivers/gpu/drm/i915/intel_sdvo.c
> > @@ -2342,9 +2342,10 @@ static const struct drm_connector_funcs
intel_sdvo_connector_funcs = {
> >  };
> >  
> >  static int intel_sdvo_atomic_check(struct drm_connector *conn,
> > -				   struct drm_connector_state *new_conn_state)
> > +				   struct drm_atomic_state *state)
> >  {
> > -	struct drm_atomic_state *state = new_conn_state->state;
> > +	struct drm_connector_state *new_conn_state > > +	
drm_atomic_get_new_connector_state(state, conn);
> >  	struct drm_connector_state *old_conn_state > >  	
drm_atomic_get_old_connector_state(state, conn);
> >  	struct intel_sdvo_connector_state *old_state > > @@ -2356,13
+2357,13 @@ static int intel_sdvo_atomic_check(struct drm_connector *conn,
> >  	    (memcmp(&old_state->tv, &new_state->tv,
sizeof(old_state->tv)) ||
> >  	     memcmp(&old_conn_state->tv, &new_conn_state->tv,
sizeof(old_conn_state->tv)))) {
> >  		struct drm_crtc_state *crtc_state > > -		
drm_atomic_get_new_crtc_state(new_conn_state->state,
> > +			drm_atomic_get_new_crtc_state(state,
> >  						      new_conn_state->crtc);
> >  
> >  		crtc_state->connectors_changed = true;
> >  	}
> >  
> > -	return intel_digital_connector_atomic_check(conn, new_conn_state);
> > +	return intel_digital_connector_atomic_check(conn, state);
> >  }
> >  
> >  static const struct drm_connector_helper_funcs
intel_sdvo_connector_helper_funcs = {
> > diff --git a/drivers/gpu/drm/i915/intel_tv.c
b/drivers/gpu/drm/i915/intel_tv.c
> > index 3924c4944e1f..a41c5b467c14 100644
> > --- a/drivers/gpu/drm/i915/intel_tv.c
> > +++ b/drivers/gpu/drm/i915/intel_tv.c
> > @@ -1817,16 +1817,18 @@ static const struct drm_connector_funcs
intel_tv_connector_funcs = {
> >  };
> >  
> >  static int intel_tv_atomic_check(struct drm_connector *connector,
> > -				 struct drm_connector_state *new_state)
> > +				 struct drm_atomic_state *state)
> >  {
> > +	struct drm_connector_state *new_state;
> >  	struct drm_crtc_state *new_crtc_state;
> >  	struct drm_connector_state *old_state;
> >  
> > +	new_state = drm_atomic_get_new_connector_state(state, connector);
> >  	if (!new_state->crtc)
> >  		return 0;
> >  
> > -	old_state = drm_atomic_get_old_connector_state(new_state->state,
connector);
> > -	new_crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
new_state->crtc);
> > +	old_state = drm_atomic_get_old_connector_state(state, connector);
> > +	new_crtc_state = drm_atomic_get_new_crtc_state(state,
new_state->crtc);
> >  
> >  	if (old_state->tv.mode != new_state->tv.mode ||
> >  	    old_state->tv.margins.left != new_state->tv.margins.left
||
> > diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c
b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > index 4b1650f51955..7ba373f493b2 100644
> > --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > @@ -948,11 +948,12 @@ nv50_mstc_get_modes(struct drm_connector
*connector)
> >  
> >  static int
> >  nv50_mstc_atomic_check(struct drm_connector *connector,
> > -		       struct drm_connector_state *new_conn_state)
> > +		       struct drm_atomic_state *state)
> >  {
> > -	struct drm_atomic_state *state = new_conn_state->state;
> >  	struct nv50_mstc *mstc = nv50_mstc(connector);
> >  	struct drm_dp_mst_topology_mgr *mgr = &mstc->mstm->mgr;
> > +	struct drm_connector_state *new_conn_state > > +	
drm_atomic_get_new_connector_state(state, connector);
> >  	struct drm_connector_state *old_conn_state > >  	
drm_atomic_get_old_connector_state(state, connector);
> >  	struct drm_crtc_state *crtc_state;
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c
b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > index 620b51aab291..5b81ba2a7f27 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > @@ -92,13 +92,15 @@ static int rcar_lvds_connector_get_modes(struct
drm_connector *connector)
> >  }
> >  
> >  static int rcar_lvds_connector_atomic_check(struct drm_connector
*connector,
> > -					    struct drm_connector_state *state)
> > +					    struct drm_atomic_state *state)
> >  {
> >  	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
> >  	const struct drm_display_mode *panel_mode;
> > +	struct drm_connector_state *conn_state;
> >  	struct drm_crtc_state *crtc_state;
> >  
> > -	if (!state->crtc)
> > +	conn_state = drm_atomic_get_new_connector_state(state, connector);
> > +	if (!conn_state->crtc)
> >  		return 0;
> >  
> >  	if (list_empty(&connector->modes)) {
> > @@ -110,9 +112,9 @@ static int rcar_lvds_connector_atomic_check(struct
drm_connector *connector,
> >  				      struct drm_display_mode, head);
> >  
> >  	/* We're not allowed to modify the resolution. */
> > -	crtc_state = drm_atomic_get_crtc_state(state->state,
state->crtc);
> > -	if (IS_ERR(crtc_state))
> > -		return PTR_ERR(crtc_state);
> > +	crtc_state = drm_atomic_get_crtc_state(state, conn_state->crtc);
> > +	if (!crtc_state)
> > +		return -EINVAL;
> >  
> >  	if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
> >  	    crtc_state->mode.vdisplay != panel_mode->vdisplay)
> > diff --git a/drivers/gpu/drm/vc4/vc4_txp.c
b/drivers/gpu/drm/vc4/vc4_txp.c
> > index c8b89a78f9f4..96f91c1b4b6e 100644
> > --- a/drivers/gpu/drm/vc4/vc4_txp.c
> > +++ b/drivers/gpu/drm/vc4/vc4_txp.c
> > @@ -221,17 +221,18 @@ static const u32 txp_fmts[] = {
> >  };
> >  
> >  static int vc4_txp_connector_atomic_check(struct drm_connector *conn,
> > -					struct drm_connector_state *conn_state)
> > +					  struct drm_atomic_state *state)
> >  {
> > +	struct drm_connector_state *conn_state;
> >  	struct drm_crtc_state *crtc_state;
> >  	struct drm_framebuffer *fb;
> >  	int i;
> >  
> > +	conn_state = drm_atomic_get_new_connector_state(state, conn);
> >  	if (!conn_state->writeback_job ||
!conn_state->writeback_job->fb)
> >  		return 0;
> >  
> > -	crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
> > -						   conn_state->crtc);
> > +	crtc_state = drm_atomic_get_new_crtc_state(state,
conn_state->crtc);
> >  
> >  	fb = conn_state->writeback_job->fb;
> >  	if (fb->width != crtc_state->mode.hdisplay ||
> > diff --git a/include/drm/drm_modeset_helper_vtables.h
b/include/drm/drm_modeset_helper_vtables.h
> > index de57fb40cb6e..adc8b7cf64b5 100644
> > --- a/include/drm/drm_modeset_helper_vtables.h
> > +++ b/include/drm/drm_modeset_helper_vtables.h
> > @@ -1020,7 +1020,7 @@ struct drm_connector_helper_funcs {
> >  	 * deadlock.
> >  	 */
> >  	int (*atomic_check)(struct drm_connector *connector,
> > -			    struct drm_connector_state *state);
> > +			    struct drm_atomic_state *state);
> >  
> >  	/**
> >  	 * @atomic_commit:
> 
> -- 
> Regards,
> 
> Laurent Pinchart
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

Hi Daniel,

On Mon, May 13, 2019 at 04:47:47PM +0200, Daniel Vetter
wrote:
> On Sat, May 11, 2019 at 10:12:02PM +0300, Laurent Pinchart wrote:
> > On Thu, May 02, 2019 at 03:49:46PM -0400, Sean Paul wrote:
> >> From: Sean Paul <seanpaul at chromium.org>
> >> 
> >> Everyone who implements connector_helper_funcs->atomic_check
reaches
> >> into the connector state to get the atomic state. Instead of
continuing
> >> this pattern, change the callback signature to just give atomic
state
> >> and let the driver determine what it does and does not need from
it.
> >> 
> >> Eventually all atomic functions should do this, but that's
just too much
> >> busy work for me.
> > 
> > Given that drivers also access the connector state, isn't this
slightly
> > more inefficient ?
> 
> It's atomic code, we're trying to optimize for clean code at the
expense
> of a bit of runtime overhead due to more pointer chasing. And I agree with
> the general push, the pile of old/new_state pointers of various objects
> we're passing around is confusing. Passing the overall drm_atomic_state
> seems much more reasonable, and with that we can get everything else. Plus
> it's much more obvious whether you have the old/new state (since
that's
> explicit when you look it up from the drm_atomic_state).
Yes, I agree it's cleaner. I just hope the atomic state tracking cost
can be kept under control :-)

By the way, this is likely not going to happen as it would be way too
intrusive, but it would be nice to rename drm_atomic_state to
drm_atomic_transaction (or something similar). It doesn't model a state,
but a change between an old state to a new state. This confused me in
the past, and I'm sure it can still be confusing to newcomers.
> If we ever see this show up in profile, and it starts mattering, first
> thing we need is a hashtable I think (atm it's list walking, which is
just
> terrible). But thus far no one cares.
> 
> >> Changes in v3:
> >> - Added to the set
> >> 
> >> Cc: Daniel Vetter <daniel at ffwll.ch>
> >> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >> Cc: Jani Nikula <jani.nikula at linux.intel.com>
> >> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> >> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> >> Cc: Ben Skeggs <bskeggs at redhat.com>
> >> Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> >> Cc: Kieran Bingham <kieran.bingham+renesas at
ideasonboard.com>
> >> Cc: Eric Anholt <eric at anholt.net>
> >> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> >> ---
> >>  drivers/gpu/drm/drm_atomic_helper.c      |  4 ++--
> >>  drivers/gpu/drm/i915/intel_atomic.c      |  8 +++++---
> >>  drivers/gpu/drm/i915/intel_dp_mst.c      |  7 ++++---
> >>  drivers/gpu/drm/i915/intel_drv.h         |  2 +-
> >>  drivers/gpu/drm/i915/intel_sdvo.c        |  9 +++++----
> >>  drivers/gpu/drm/i915/intel_tv.c          |  8 +++++---
> >>  drivers/gpu/drm/nouveau/dispnv50/disp.c  |  5 +++--
> >>  drivers/gpu/drm/rcar-du/rcar_lvds.c      | 12 +++++++-----
> >>  drivers/gpu/drm/vc4/vc4_txp.c            |  7 ++++---
> >>  include/drm/drm_modeset_helper_vtables.h |  2 +-
> >>  10 files changed, 37 insertions(+), 27 deletions(-)
> >> 
> >> diff --git a/drivers/gpu/drm/drm_atomic_helper.c
b/drivers/gpu/drm/drm_atomic_helper.c
> >> index 9d9e47276839..fa5a367507c1 100644
> >> --- a/drivers/gpu/drm/drm_atomic_helper.c
> >> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> >> @@ -683,7 +683,7 @@ drm_atomic_helper_check_modeset(struct
drm_device *dev,
> >>  		}
> >>  
> >>  		if (funcs->atomic_check)
> >> -			ret = funcs->atomic_check(connector, new_connector_state);
> >> +			ret = funcs->atomic_check(connector, state);
> >>  		if (ret)
> >>  			return ret;
> >>  
> >> @@ -725,7 +725,7 @@ drm_atomic_helper_check_modeset(struct
drm_device *dev,
> >>  			continue;
> >>  
> >>  		if (funcs->atomic_check)
> >> -			ret = funcs->atomic_check(connector, new_connector_state);
> >> +			ret = funcs->atomic_check(connector, state);
> >>  		if (ret)
> >>  			return ret;
> >>  	}
> >> diff --git a/drivers/gpu/drm/i915/intel_atomic.c
b/drivers/gpu/drm/i915/intel_atomic.c
> >> index b844e8840c6f..e8a5b82e9242 100644
> >> --- a/drivers/gpu/drm/i915/intel_atomic.c
> >> +++ b/drivers/gpu/drm/i915/intel_atomic.c
> >> @@ -103,12 +103,14 @@ int
intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> >>  }
> >>  
> >>  int intel_digital_connector_atomic_check(struct drm_connector
*conn,
> >> -					 struct drm_connector_state *new_state)
> >> +					 struct drm_atomic_state *state)
> >>  {
> >> +	struct drm_connector_state *new_state > >> +	
drm_atomic_get_new_connector_state(state, conn);
> >>  	struct intel_digital_connector_state *new_conn_state >
>>  		to_intel_digital_connector_state(new_state);
> >>  	struct drm_connector_state *old_state > >> -	
drm_atomic_get_old_connector_state(new_state->state, conn);
> >> +		drm_atomic_get_old_connector_state(state, conn);
> >>  	struct intel_digital_connector_state *old_conn_state >
>>  		to_intel_digital_connector_state(old_state);
> >>  	struct drm_crtc_state *crtc_state;
> >> @@ -118,7 +120,7 @@ int
intel_digital_connector_atomic_check(struct drm_connector *conn,
> >>  	if (!new_state->crtc)
> >>  		return 0;
> >>  
> >> -	crtc_state = drm_atomic_get_new_crtc_state(new_state->state,
new_state->crtc);
> >> +	crtc_state = drm_atomic_get_new_crtc_state(state,
new_state->crtc);
> >>  
> >>  	/*
> >>  	 * These properties are handled by fastset, and might not end
> >> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c
b/drivers/gpu/drm/i915/intel_dp_mst.c
> >> index 19d81cef2ab6..89cfec128ba0 100644
> >> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> >> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> >> @@ -143,9 +143,10 @@ static int intel_dp_mst_compute_config(struct
intel_encoder *encoder,
> >>  
> >>  static int
> >>  intel_dp_mst_atomic_check(struct drm_connector *connector,
> >> -			  struct drm_connector_state *new_conn_state)
> >> +			  struct drm_atomic_state *state)
> >>  {
> >> -	struct drm_atomic_state *state = new_conn_state->state;
> >> +	struct drm_connector_state *new_conn_state > >> +	
drm_atomic_get_new_connector_state(state, connector);
> >>  	struct drm_connector_state *old_conn_state > >>  	
drm_atomic_get_old_connector_state(state, connector);
> >>  	struct intel_connector *intel_connector > >> @@ -155,7
+156,7 @@ intel_dp_mst_atomic_check(struct drm_connector *connector,
> >>  	struct drm_dp_mst_topology_mgr *mgr;
> >>  	int ret;
> >>  
> >> -	ret = intel_digital_connector_atomic_check(connector,
new_conn_state);
> >> +	ret = intel_digital_connector_atomic_check(connector, state);
> >>  	if (ret)
> >>  		return ret;
> >>  
> >> diff --git a/drivers/gpu/drm/i915/intel_drv.h
b/drivers/gpu/drm/i915/intel_drv.h
> >> index f8c7b291fdc3..88571b8e8d62 100644
> >> --- a/drivers/gpu/drm/i915/intel_drv.h
> >> +++ b/drivers/gpu/drm/i915/intel_drv.h
> >> @@ -2481,7 +2481,7 @@ int
intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> >>  						struct drm_property *property,
> >>  						u64 val);
> >>  int intel_digital_connector_atomic_check(struct drm_connector
*conn,
> >> -					 struct drm_connector_state *new_state);
> >> +					 struct drm_atomic_state *state);
> >>  struct drm_connector_state *
> >>  intel_digital_connector_duplicate_state(struct drm_connector
*connector);
> >>  
> >> diff --git a/drivers/gpu/drm/i915/intel_sdvo.c
b/drivers/gpu/drm/i915/intel_sdvo.c
> >> index 68f497493d43..72ea164b971c 100644
> >> --- a/drivers/gpu/drm/i915/intel_sdvo.c
> >> +++ b/drivers/gpu/drm/i915/intel_sdvo.c
> >> @@ -2342,9 +2342,10 @@ static const struct drm_connector_funcs
intel_sdvo_connector_funcs = {
> >>  };
> >>  
> >>  static int intel_sdvo_atomic_check(struct drm_connector *conn,
> >> -				   struct drm_connector_state *new_conn_state)
> >> +				   struct drm_atomic_state *state)
> >>  {
> >> -	struct drm_atomic_state *state = new_conn_state->state;
> >> +	struct drm_connector_state *new_conn_state > >> +	
drm_atomic_get_new_connector_state(state, conn);
> >>  	struct drm_connector_state *old_conn_state > >>  	
drm_atomic_get_old_connector_state(state, conn);
> >>  	struct intel_sdvo_connector_state *old_state > >> @@
-2356,13 +2357,13 @@ static int intel_sdvo_atomic_check(struct drm_connector
*conn,
> >>  	    (memcmp(&old_state->tv, &new_state->tv,
sizeof(old_state->tv)) ||
> >>  	     memcmp(&old_conn_state->tv,
&new_conn_state->tv, sizeof(old_conn_state->tv)))) {
> >>  		struct drm_crtc_state *crtc_state > >> -		
drm_atomic_get_new_crtc_state(new_conn_state->state,
> >> +			drm_atomic_get_new_crtc_state(state,
> >>  						      new_conn_state->crtc);
> >>  
> >>  		crtc_state->connectors_changed = true;
> >>  	}
> >>  
> >> -	return intel_digital_connector_atomic_check(conn,
new_conn_state);
> >> +	return intel_digital_connector_atomic_check(conn, state);
> >>  }
> >>  
> >>  static const struct drm_connector_helper_funcs
intel_sdvo_connector_helper_funcs = {
> >> diff --git a/drivers/gpu/drm/i915/intel_tv.c
b/drivers/gpu/drm/i915/intel_tv.c
> >> index 3924c4944e1f..a41c5b467c14 100644
> >> --- a/drivers/gpu/drm/i915/intel_tv.c
> >> +++ b/drivers/gpu/drm/i915/intel_tv.c
> >> @@ -1817,16 +1817,18 @@ static const struct drm_connector_funcs
intel_tv_connector_funcs = {
> >>  };
> >>  
> >>  static int intel_tv_atomic_check(struct drm_connector *connector,
> >> -				 struct drm_connector_state *new_state)
> >> +				 struct drm_atomic_state *state)
> >>  {
> >> +	struct drm_connector_state *new_state;
> >>  	struct drm_crtc_state *new_crtc_state;
> >>  	struct drm_connector_state *old_state;
> >>  
> >> +	new_state = drm_atomic_get_new_connector_state(state,
connector);
> >>  	if (!new_state->crtc)
> >>  		return 0;
> >>  
> >> -	old_state =
drm_atomic_get_old_connector_state(new_state->state, connector);
> >> -	new_crtc_state =
drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
> >> +	old_state = drm_atomic_get_old_connector_state(state,
connector);
> >> +	new_crtc_state = drm_atomic_get_new_crtc_state(state,
new_state->crtc);
> >>  
> >>  	if (old_state->tv.mode != new_state->tv.mode ||
> >>  	    old_state->tv.margins.left !=
new_state->tv.margins.left ||
> >> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c
b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> >> index 4b1650f51955..7ba373f493b2 100644
> >> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> >> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> >> @@ -948,11 +948,12 @@ nv50_mstc_get_modes(struct drm_connector
*connector)
> >>  
> >>  static int
> >>  nv50_mstc_atomic_check(struct drm_connector *connector,
> >> -		       struct drm_connector_state *new_conn_state)
> >> +		       struct drm_atomic_state *state)
> >>  {
> >> -	struct drm_atomic_state *state = new_conn_state->state;
> >>  	struct nv50_mstc *mstc = nv50_mstc(connector);
> >>  	struct drm_dp_mst_topology_mgr *mgr =
&mstc->mstm->mgr;
> >> +	struct drm_connector_state *new_conn_state > >> +	
drm_atomic_get_new_connector_state(state, connector);
> >>  	struct drm_connector_state *old_conn_state > >>  	
drm_atomic_get_old_connector_state(state, connector);
> >>  	struct drm_crtc_state *crtc_state;
> >> diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c
b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> >> index 620b51aab291..5b81ba2a7f27 100644
> >> --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
> >> +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> >> @@ -92,13 +92,15 @@ static int
rcar_lvds_connector_get_modes(struct drm_connector *connector)
> >>  }
> >>  
> >>  static int rcar_lvds_connector_atomic_check(struct drm_connector
*connector,
> >> -					    struct drm_connector_state *state)
> >> +					    struct drm_atomic_state *state)
> >>  {
> >>  	struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
> >>  	const struct drm_display_mode *panel_mode;
> >> +	struct drm_connector_state *conn_state;
> >>  	struct drm_crtc_state *crtc_state;
> >>  
> >> -	if (!state->crtc)
> >> +	conn_state = drm_atomic_get_new_connector_state(state,
connector);
> >> +	if (!conn_state->crtc)
> >>  		return 0;
> >>  
> >>  	if (list_empty(&connector->modes)) {
> >> @@ -110,9 +112,9 @@ static int
rcar_lvds_connector_atomic_check(struct drm_connector *connector,
> >>  				      struct drm_display_mode, head);
> >>  
> >>  	/* We're not allowed to modify the resolution. */
> >> -	crtc_state = drm_atomic_get_crtc_state(state->state,
state->crtc);
> >> -	if (IS_ERR(crtc_state))
> >> -		return PTR_ERR(crtc_state);
> >> +	crtc_state = drm_atomic_get_crtc_state(state,
conn_state->crtc);
> >> +	if (!crtc_state)
> >> +		return -EINVAL;
> >>  
> >>  	if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
> >>  	    crtc_state->mode.vdisplay != panel_mode->vdisplay)
> >> diff --git a/drivers/gpu/drm/vc4/vc4_txp.c
b/drivers/gpu/drm/vc4/vc4_txp.c
> >> index c8b89a78f9f4..96f91c1b4b6e 100644
> >> --- a/drivers/gpu/drm/vc4/vc4_txp.c
> >> +++ b/drivers/gpu/drm/vc4/vc4_txp.c
> >> @@ -221,17 +221,18 @@ static const u32 txp_fmts[] = {
> >>  };
> >>  
> >>  static int vc4_txp_connector_atomic_check(struct drm_connector
*conn,
> >> -					struct drm_connector_state *conn_state)
> >> +					  struct drm_atomic_state *state)
> >>  {
> >> +	struct drm_connector_state *conn_state;
> >>  	struct drm_crtc_state *crtc_state;
> >>  	struct drm_framebuffer *fb;
> >>  	int i;
> >>  
> >> +	conn_state = drm_atomic_get_new_connector_state(state, conn);
> >>  	if (!conn_state->writeback_job ||
!conn_state->writeback_job->fb)
> >>  		return 0;
> >>  
> >> -	crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
> >> -						   conn_state->crtc);
> >> +	crtc_state = drm_atomic_get_new_crtc_state(state,
conn_state->crtc);
> >>  
> >>  	fb = conn_state->writeback_job->fb;
> >>  	if (fb->width != crtc_state->mode.hdisplay ||
> >> diff --git a/include/drm/drm_modeset_helper_vtables.h
b/include/drm/drm_modeset_helper_vtables.h
> >> index de57fb40cb6e..adc8b7cf64b5 100644
> >> --- a/include/drm/drm_modeset_helper_vtables.h
> >> +++ b/include/drm/drm_modeset_helper_vtables.h
> >> @@ -1020,7 +1020,7 @@ struct drm_connector_helper_funcs {
> >>  	 * deadlock.
> >>  	 */
> >>  	int (*atomic_check)(struct drm_connector *connector,
> >> -			    struct drm_connector_state *state);
> >> +			    struct drm_atomic_state *state);
> >>  
> >>  	/**
> >>  	 * @atomic_commit:
-- 
Regards,

Laurent Pinchart

On Thu, May 16, 2019 at 2:02 PM Laurent Pinchart
<laurent.pinchart at ideasonboard.com> wrote:
>
> Hi Daniel,
>
> On Mon, May 13, 2019 at 04:47:47PM +0200, Daniel Vetter wrote:
> > On Sat, May 11, 2019 at 10:12:02PM +0300, Laurent Pinchart wrote:
> > > On Thu, May 02, 2019 at 03:49:46PM -0400, Sean Paul wrote:
> > >> From: Sean Paul <seanpaul at chromium.org>
> > >>
> > >> Everyone who implements
connector_helper_funcs->atomic_check reaches
> > >> into the connector state to get the atomic state. Instead of
continuing
> > >> this pattern, change the callback signature to just give
atomic state
> > >> and let the driver determine what it does and does not need
from it.
> > >>
> > >> Eventually all atomic functions should do this, but
that's just too much
> > >> busy work for me.
> > >
> > > Given that drivers also access the connector state, isn't
this slightly
> > > more inefficient ?
> >
> > It's atomic code, we're trying to optimize for clean code at
the expense
> > of a bit of runtime overhead due to more pointer chasing. And I agree
with
> > the general push, the pile of old/new_state pointers of various
objects
> > we're passing around is confusing. Passing the overall
drm_atomic_state
> > seems much more reasonable, and with that we can get everything else.
Plus
> > it's much more obvious whether you have the old/new state (since
that's
> > explicit when you look it up from the drm_atomic_state).
>
> Yes, I agree it's cleaner. I just hope the atomic state tracking cost
> can be kept under control :-)
>
> By the way, this is likely not going to happen as it would be way too
> intrusive, but it would be nice to rename drm_atomic_state to
> drm_atomic_transaction (or something similar). It doesn't model a
state,
> but a change between an old state to a new state. This confused me in
> the past, and I'm sure it can still be confusing to newcomers.
Why are you the first to suggest this, this is awesome!
drm_atomic_state is indeed not a state, but a transaction representing
how we go from the old to the new state.

I think this is awesome enough that we should actually try to make it
happen. Tree-wide cocci + bribing Dave on St. Patrick's day with lots
of beer might be enough :-)
-Daniel
> > If we ever see this show up in profile, and it starts mattering, first
> > thing we need is a hashtable I think (atm it's list walking, which
is just
> > terrible). But thus far no one cares.
> >
> > >> Changes in v3:
> > >> - Added to the set
> > >>
> > >> Cc: Daniel Vetter <daniel at ffwll.ch>
> > >> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > >> Cc: Jani Nikula <jani.nikula at linux.intel.com>
> > >> Cc: Joonas Lahtinen <joonas.lahtinen at
linux.intel.com>
> > >> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > >> Cc: Ben Skeggs <bskeggs at redhat.com>
> > >> Cc: Laurent Pinchart <laurent.pinchart at
ideasonboard.com>
> > >> Cc: Kieran Bingham <kieran.bingham+renesas at
ideasonboard.com>
> > >> Cc: Eric Anholt <eric at anholt.net>
> > >> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> > >> ---
> > >>  drivers/gpu/drm/drm_atomic_helper.c      |  4 ++--
> > >>  drivers/gpu/drm/i915/intel_atomic.c      |  8 +++++---
> > >>  drivers/gpu/drm/i915/intel_dp_mst.c      |  7 ++++---
> > >>  drivers/gpu/drm/i915/intel_drv.h         |  2 +-
> > >>  drivers/gpu/drm/i915/intel_sdvo.c        |  9 +++++----
> > >>  drivers/gpu/drm/i915/intel_tv.c          |  8 +++++---
> > >>  drivers/gpu/drm/nouveau/dispnv50/disp.c  |  5 +++--
> > >>  drivers/gpu/drm/rcar-du/rcar_lvds.c      | 12 +++++++-----
> > >>  drivers/gpu/drm/vc4/vc4_txp.c            |  7 ++++---
> > >>  include/drm/drm_modeset_helper_vtables.h |  2 +-
> > >>  10 files changed, 37 insertions(+), 27 deletions(-)
> > >>
> > >> diff --git a/drivers/gpu/drm/drm_atomic_helper.c
b/drivers/gpu/drm/drm_atomic_helper.c
> > >> index 9d9e47276839..fa5a367507c1 100644
> > >> --- a/drivers/gpu/drm/drm_atomic_helper.c
> > >> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> > >> @@ -683,7 +683,7 @@ drm_atomic_helper_check_modeset(struct
drm_device *dev,
> > >>            }
> > >>
> > >>            if (funcs->atomic_check)
> > >> -                  ret = funcs->atomic_check(connector,
new_connector_state);
> > >> +                  ret = funcs->atomic_check(connector,
state);
> > >>            if (ret)
> > >>                    return ret;
> > >>
> > >> @@ -725,7 +725,7 @@ drm_atomic_helper_check_modeset(struct
drm_device *dev,
> > >>                    continue;
> > >>
> > >>            if (funcs->atomic_check)
> > >> -                  ret = funcs->atomic_check(connector,
new_connector_state);
> > >> +                  ret = funcs->atomic_check(connector,
state);
> > >>            if (ret)
> > >>                    return ret;
> > >>    }
> > >> diff --git a/drivers/gpu/drm/i915/intel_atomic.c
b/drivers/gpu/drm/i915/intel_atomic.c
> > >> index b844e8840c6f..e8a5b82e9242 100644
> > >> --- a/drivers/gpu/drm/i915/intel_atomic.c
> > >> +++ b/drivers/gpu/drm/i915/intel_atomic.c
> > >> @@ -103,12 +103,14 @@ int
intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> > >>  }
> > >>
> > >>  int intel_digital_connector_atomic_check(struct
drm_connector *conn,
> > >> -                                   struct
drm_connector_state *new_state)
> > >> +                                   struct drm_atomic_state
*state)
> > >>  {
> > >> +  struct drm_connector_state *new_state > > >> +
drm_atomic_get_new_connector_state(state, conn);
> > >>    struct intel_digital_connector_state *new_conn_state >
> >>            to_intel_digital_connector_state(new_state);
> > >>    struct drm_connector_state *old_state > > >> -
drm_atomic_get_old_connector_state(new_state->state, conn);
> > >> +          drm_atomic_get_old_connector_state(state, conn);
> > >>    struct intel_digital_connector_state *old_conn_state >
> >>            to_intel_digital_connector_state(old_state);
> > >>    struct drm_crtc_state *crtc_state;
> > >> @@ -118,7 +120,7 @@ int
intel_digital_connector_atomic_check(struct drm_connector *conn,
> > >>    if (!new_state->crtc)
> > >>            return 0;
> > >>
> > >> -  crtc_state =
drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
> > >> +  crtc_state = drm_atomic_get_new_crtc_state(state,
new_state->crtc);
> > >>
> > >>    /*
> > >>     * These properties are handled by fastset, and might not
end
> > >> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c
b/drivers/gpu/drm/i915/intel_dp_mst.c
> > >> index 19d81cef2ab6..89cfec128ba0 100644
> > >> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> > >> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> > >> @@ -143,9 +143,10 @@ static int
intel_dp_mst_compute_config(struct intel_encoder *encoder,
> > >>
> > >>  static int
> > >>  intel_dp_mst_atomic_check(struct drm_connector *connector,
> > >> -                    struct drm_connector_state
*new_conn_state)
> > >> +                    struct drm_atomic_state *state)
> > >>  {
> > >> -  struct drm_atomic_state *state = new_conn_state->state;
> > >> +  struct drm_connector_state *new_conn_state > >
>> +          drm_atomic_get_new_connector_state(state, connector);
> > >>    struct drm_connector_state *old_conn_state > >
>>            drm_atomic_get_old_connector_state(state, connector);
> > >>    struct intel_connector *intel_connector > > >>
@@ -155,7 +156,7 @@ intel_dp_mst_atomic_check(struct drm_connector *connector,
> > >>    struct drm_dp_mst_topology_mgr *mgr;
> > >>    int ret;
> > >>
> > >> -  ret = intel_digital_connector_atomic_check(connector,
new_conn_state);
> > >> +  ret = intel_digital_connector_atomic_check(connector,
state);
> > >>    if (ret)
> > >>            return ret;
> > >>
> > >> diff --git a/drivers/gpu/drm/i915/intel_drv.h
b/drivers/gpu/drm/i915/intel_drv.h
> > >> index f8c7b291fdc3..88571b8e8d62 100644
> > >> --- a/drivers/gpu/drm/i915/intel_drv.h
> > >> +++ b/drivers/gpu/drm/i915/intel_drv.h
> > >> @@ -2481,7 +2481,7 @@ int
intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> > >>                                            struct
drm_property *property,
> > >>                                            u64 val);
> > >>  int intel_digital_connector_atomic_check(struct
drm_connector *conn,
> > >> -                                   struct
drm_connector_state *new_state);
> > >> +                                   struct drm_atomic_state
*state);
> > >>  struct drm_connector_state *
> > >>  intel_digital_connector_duplicate_state(struct drm_connector
*connector);
> > >>
> > >> diff --git a/drivers/gpu/drm/i915/intel_sdvo.c
b/drivers/gpu/drm/i915/intel_sdvo.c
> > >> index 68f497493d43..72ea164b971c 100644
> > >> --- a/drivers/gpu/drm/i915/intel_sdvo.c
> > >> +++ b/drivers/gpu/drm/i915/intel_sdvo.c
> > >> @@ -2342,9 +2342,10 @@ static const struct
drm_connector_funcs intel_sdvo_connector_funcs = {
> > >>  };
> > >>
> > >>  static int intel_sdvo_atomic_check(struct drm_connector
*conn,
> > >> -                             struct drm_connector_state
*new_conn_state)
> > >> +                             struct drm_atomic_state *state)
> > >>  {
> > >> -  struct drm_atomic_state *state = new_conn_state->state;
> > >> +  struct drm_connector_state *new_conn_state > >
>> +          drm_atomic_get_new_connector_state(state, conn);
> > >>    struct drm_connector_state *old_conn_state > >
>>            drm_atomic_get_old_connector_state(state, conn);
> > >>    struct intel_sdvo_connector_state *old_state > >
>> @@ -2356,13 +2357,13 @@ static int intel_sdvo_atomic_check(struct
drm_connector *conn,
> > >>        (memcmp(&old_state->tv, &new_state->tv,
sizeof(old_state->tv)) ||
> > >>         memcmp(&old_conn_state->tv,
&new_conn_state->tv, sizeof(old_conn_state->tv)))) {
> > >>            struct drm_crtc_state *crtc_state > >
>> -                 
drm_atomic_get_new_crtc_state(new_conn_state->state,
> > >> +                  drm_atomic_get_new_crtc_state(state,
> > >>                                                 
new_conn_state->crtc);
> > >>
> > >>            crtc_state->connectors_changed = true;
> > >>    }
> > >>
> > >> -  return intel_digital_connector_atomic_check(conn,
new_conn_state);
> > >> +  return intel_digital_connector_atomic_check(conn, state);
> > >>  }
> > >>
> > >>  static const struct drm_connector_helper_funcs
intel_sdvo_connector_helper_funcs = {
> > >> diff --git a/drivers/gpu/drm/i915/intel_tv.c
b/drivers/gpu/drm/i915/intel_tv.c
> > >> index 3924c4944e1f..a41c5b467c14 100644
> > >> --- a/drivers/gpu/drm/i915/intel_tv.c
> > >> +++ b/drivers/gpu/drm/i915/intel_tv.c
> > >> @@ -1817,16 +1817,18 @@ static const struct
drm_connector_funcs intel_tv_connector_funcs = {
> > >>  };
> > >>
> > >>  static int intel_tv_atomic_check(struct drm_connector
*connector,
> > >> -                           struct drm_connector_state
*new_state)
> > >> +                           struct drm_atomic_state *state)
> > >>  {
> > >> +  struct drm_connector_state *new_state;
> > >>    struct drm_crtc_state *new_crtc_state;
> > >>    struct drm_connector_state *old_state;
> > >>
> > >> +  new_state = drm_atomic_get_new_connector_state(state,
connector);
> > >>    if (!new_state->crtc)
> > >>            return 0;
> > >>
> > >> -  old_state =
drm_atomic_get_old_connector_state(new_state->state, connector);
> > >> -  new_crtc_state =
drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
> > >> +  old_state = drm_atomic_get_old_connector_state(state,
connector);
> > >> +  new_crtc_state = drm_atomic_get_new_crtc_state(state,
new_state->crtc);
> > >>
> > >>    if (old_state->tv.mode != new_state->tv.mode ||
> > >>        old_state->tv.margins.left !=
new_state->tv.margins.left ||
> > >> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c
b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > >> index 4b1650f51955..7ba373f493b2 100644
> > >> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > >> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > >> @@ -948,11 +948,12 @@ nv50_mstc_get_modes(struct
drm_connector *connector)
> > >>
> > >>  static int
> > >>  nv50_mstc_atomic_check(struct drm_connector *connector,
> > >> -                 struct drm_connector_state *new_conn_state)
> > >> +                 struct drm_atomic_state *state)
> > >>  {
> > >> -  struct drm_atomic_state *state = new_conn_state->state;
> > >>    struct nv50_mstc *mstc = nv50_mstc(connector);
> > >>    struct drm_dp_mst_topology_mgr *mgr =
&mstc->mstm->mgr;
> > >> +  struct drm_connector_state *new_conn_state > >
>> +          drm_atomic_get_new_connector_state(state, connector);
> > >>    struct drm_connector_state *old_conn_state > >
>>            drm_atomic_get_old_connector_state(state, connector);
> > >>    struct drm_crtc_state *crtc_state;
> > >> diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c
b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > >> index 620b51aab291..5b81ba2a7f27 100644
> > >> --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > >> +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> > >> @@ -92,13 +92,15 @@ static int
rcar_lvds_connector_get_modes(struct drm_connector *connector)
> > >>  }
> > >>
> > >>  static int rcar_lvds_connector_atomic_check(struct
drm_connector *connector,
> > >> -                                      struct
drm_connector_state *state)
> > >> +                                      struct
drm_atomic_state *state)
> > >>  {
> > >>    struct rcar_lvds *lvds =
connector_to_rcar_lvds(connector);
> > >>    const struct drm_display_mode *panel_mode;
> > >> +  struct drm_connector_state *conn_state;
> > >>    struct drm_crtc_state *crtc_state;
> > >>
> > >> -  if (!state->crtc)
> > >> +  conn_state = drm_atomic_get_new_connector_state(state,
connector);
> > >> +  if (!conn_state->crtc)
> > >>            return 0;
> > >>
> > >>    if (list_empty(&connector->modes)) {
> > >> @@ -110,9 +112,9 @@ static int
rcar_lvds_connector_atomic_check(struct drm_connector *connector,
> > >>                                  struct drm_display_mode,
head);
> > >>
> > >>    /* We're not allowed to modify the resolution. */
> > >> -  crtc_state = drm_atomic_get_crtc_state(state->state,
state->crtc);
> > >> -  if (IS_ERR(crtc_state))
> > >> -          return PTR_ERR(crtc_state);
> > >> +  crtc_state = drm_atomic_get_crtc_state(state,
conn_state->crtc);
> > >> +  if (!crtc_state)
> > >> +          return -EINVAL;
> > >>
> > >>    if (crtc_state->mode.hdisplay !=
panel_mode->hdisplay ||
> > >>        crtc_state->mode.vdisplay !=
panel_mode->vdisplay)
> > >> diff --git a/drivers/gpu/drm/vc4/vc4_txp.c
b/drivers/gpu/drm/vc4/vc4_txp.c
> > >> index c8b89a78f9f4..96f91c1b4b6e 100644
> > >> --- a/drivers/gpu/drm/vc4/vc4_txp.c
> > >> +++ b/drivers/gpu/drm/vc4/vc4_txp.c
> > >> @@ -221,17 +221,18 @@ static const u32 txp_fmts[] = {
> > >>  };
> > >>
> > >>  static int vc4_txp_connector_atomic_check(struct
drm_connector *conn,
> > >> -                                  struct drm_connector_state
*conn_state)
> > >> +                                    struct drm_atomic_state
*state)
> > >>  {
> > >> +  struct drm_connector_state *conn_state;
> > >>    struct drm_crtc_state *crtc_state;
> > >>    struct drm_framebuffer *fb;
> > >>    int i;
> > >>
> > >> +  conn_state = drm_atomic_get_new_connector_state(state,
conn);
> > >>    if (!conn_state->writeback_job ||
!conn_state->writeback_job->fb)
> > >>            return 0;
> > >>
> > >> -  crtc_state =
drm_atomic_get_new_crtc_state(conn_state->state,
> > >> -                                            
conn_state->crtc);
> > >> +  crtc_state = drm_atomic_get_new_crtc_state(state,
conn_state->crtc);
> > >>
> > >>    fb = conn_state->writeback_job->fb;
> > >>    if (fb->width != crtc_state->mode.hdisplay ||
> > >> diff --git a/include/drm/drm_modeset_helper_vtables.h
b/include/drm/drm_modeset_helper_vtables.h
> > >> index de57fb40cb6e..adc8b7cf64b5 100644
> > >> --- a/include/drm/drm_modeset_helper_vtables.h
> > >> +++ b/include/drm/drm_modeset_helper_vtables.h
> > >> @@ -1020,7 +1020,7 @@ struct drm_connector_helper_funcs {
> > >>     * deadlock.
> > >>     */
> > >>    int (*atomic_check)(struct drm_connector *connector,
> > >> -                      struct drm_connector_state *state);
> > >> +                      struct drm_atomic_state *state);
> > >>
> > >>    /**
> > >>     * @atomic_commit:
>
> --
> Regards,
>
> Laurent Pinchart
> _______________________________________________
> dri-devel mailing list
> dri-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel


-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch