diff mbox series

[v2,1/9] drm/i915/psr: Disable PSR before modesets turn off all planes

Message ID 20211022103304.24164-2-ville.syrjala@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: Fix bigjoiner state readout | expand

Commit Message

Ville Syrjala Oct. 22, 2021, 10:32 a.m. UTC
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

PSR2 apparently requires some planes to be enabled for some
silly reason, and so we are now trying to turn PSR off before
planes go off. Except during a full modeset that is handled
less clearly through reorganization of the modeset sequence.
That is not great as it makes the code mode complex, and
prevents us from doing nice things such as just turning off
all the planes at the very start of the modeset. So let's
move the PSR pre_plane_update() thing to a spot where it
will handle both full modesets and everything else.

Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c |  3 ++-
 drivers/gpu/drm/i915/display/intel_psr.c     | 25 +++++++-------------
 drivers/gpu/drm/i915/display/intel_psr.h     |  3 ++-
 3 files changed, 13 insertions(+), 18 deletions(-)

Comments

Hogander, Jouni Oct. 22, 2021, 2:29 p.m. UTC | #1
On Fri, 2021-10-22 at 13:32 +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> PSR2 apparently requires some planes to be enabled for some
> silly reason, and so we are now trying to turn PSR off before
> planes go off. Except during a full modeset that is handled
> less clearly through reorganization of the modeset sequence.
> That is not great as it makes the code mode complex, and
> prevents us from doing nice things such as just turning off
> all the planes at the very start of the modeset. So let's
> move the PSR pre_plane_update() thing to a spot where it
> will handle both full modesets and everything else.

Reviewed-by: Jouni Högander <jouni.hogander@intel.com>

One minor comment below in case you send a new version for some reason.

> 
> Cc: José Roberto de Souza <jose.souza@intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_display.c |  3 ++-
>  drivers/gpu/drm/i915/display/intel_psr.c     | 25 +++++++-----------
> --
>  drivers/gpu/drm/i915/display/intel_psr.h     |  3 ++-
>  3 files changed, 13 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index 2b97c8797177..5201d6cdd5db 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -1429,6 +1429,8 @@ static void intel_pre_plane_update(struct
> intel_atomic_state *state,
>  		intel_atomic_get_new_crtc_state(state, crtc);
>  	enum pipe pipe = crtc->pipe;
>  
> +	intel_psr_pre_plane_update(state, crtc);
> +
>  	if (hsw_pre_update_disable_ips(old_crtc_state, new_crtc_state))
>  		hsw_disable_ips(old_crtc_state);
>  
> @@ -8668,7 +8670,6 @@ static void intel_atomic_commit_tail(struct
> intel_atomic_state *state)
>  		intel_encoders_update_prepare(state);
>  
>  	intel_dbuf_pre_plane_update(state);
> -	intel_psr_pre_plane_update(state);
>  
>  	for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state,
> i) {
>  		if (new_crtc_state->uapi.async_flip)
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index ccffe05784d3..b1e48c6be8d1 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -1725,11 +1725,17 @@ int intel_psr2_sel_fetch_update(struct
> intel_atomic_state *state,
>  	return 0;
>  }
>  
> -static void _intel_psr_pre_plane_update(const struct
> intel_atomic_state *state,
> -					const struct intel_crtc_state
> *crtc_state)
> +void intel_psr_pre_plane_update(struct intel_atomic_state *state,
> +				struct intel_crtc *crtc)
>  {
> +	struct drm_i915_private *i915 = to_i915(state->base.dev);
> +	const struct intel_crtc_state *crtc_state =
> +		intel_atomic_get_new_crtc_state(state, crtc);
>  	struct intel_encoder *encoder;
>  
> +	if (!HAS_PSR(i915))
> +		return;
> +
>  	for_each_intel_encoder_mask_with_psr(state->base.dev, encoder,
>  					     crtc_state-
> >uapi.encoder_mask) {
>  		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> @@ -1744,6 +1750,7 @@ static void _intel_psr_pre_plane_update(const
> struct intel_atomic_state *state,
>  		 * - All planes will go inactive
>  		 * - Changing between PSR versions
>  		 */

This comment is not reflecting the code anymore.

> +		needs_to_disable |=
> intel_crtc_needs_modeset(crtc_state);
>  		needs_to_disable |= !crtc_state->has_psr;
>  		needs_to_disable |= !crtc_state->active_planes;
>  		needs_to_disable |= crtc_state->has_psr2 != psr-
> >psr2_enabled;
> @@ -1755,20 +1762,6 @@ static void _intel_psr_pre_plane_update(const
> struct intel_atomic_state *state,
>  	}
>  }
>  
> -void intel_psr_pre_plane_update(const struct intel_atomic_state
> *state)
> -{
> -	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> -	struct intel_crtc_state *crtc_state;
> -	struct intel_crtc *crtc;
> -	int i;
> -
> -	if (!HAS_PSR(dev_priv))
> -		return;
> -
> -	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i)
> -		_intel_psr_pre_plane_update(state, crtc_state);
> -}
> -
>  static void _intel_psr_post_plane_update(const struct
> intel_atomic_state *state,
>  					 const struct intel_crtc_state
> *crtc_state)
>  {
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.h
> b/drivers/gpu/drm/i915/display/intel_psr.h
> index facffbacd357..3d9c0e13c329 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.h
> +++ b/drivers/gpu/drm/i915/display/intel_psr.h
> @@ -20,7 +20,8 @@ struct intel_plane;
>  struct intel_encoder;
>  
>  void intel_psr_init_dpcd(struct intel_dp *intel_dp);
> -void intel_psr_pre_plane_update(const struct intel_atomic_state
> *state);
> +void intel_psr_pre_plane_update(struct intel_atomic_state *state,
> +				struct intel_crtc *crtc);
>  void intel_psr_post_plane_update(const struct intel_atomic_state
> *state);
>  void intel_psr_disable(struct intel_dp *intel_dp,
>  		       const struct intel_crtc_state *old_crtc_state);
Ville Syrjala Oct. 22, 2021, 3:26 p.m. UTC | #2
On Fri, Oct 22, 2021 at 02:29:01PM +0000, Hogander, Jouni wrote:
> On Fri, 2021-10-22 at 13:32 +0300, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > 
> > PSR2 apparently requires some planes to be enabled for some
> > silly reason, and so we are now trying to turn PSR off before
> > planes go off. Except during a full modeset that is handled
> > less clearly through reorganization of the modeset sequence.
> > That is not great as it makes the code mode complex, and
> > prevents us from doing nice things such as just turning off
> > all the planes at the very start of the modeset. So let's
> > move the PSR pre_plane_update() thing to a spot where it
> > will handle both full modesets and everything else.
> 
> Reviewed-by: Jouni Högander <jouni.hogander@intel.com>

Thanks.

> One minor comment below in case you send a new version for some reason.
> 
> > 
> > Cc: José Roberto de Souza <jose.souza@intel.com>
> > Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_display.c |  3 ++-
> >  drivers/gpu/drm/i915/display/intel_psr.c     | 25 +++++++-----------
> > --
> >  drivers/gpu/drm/i915/display/intel_psr.h     |  3 ++-
> >  3 files changed, 13 insertions(+), 18 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index 2b97c8797177..5201d6cdd5db 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -1429,6 +1429,8 @@ static void intel_pre_plane_update(struct
> > intel_atomic_state *state,
> >  		intel_atomic_get_new_crtc_state(state, crtc);
> >  	enum pipe pipe = crtc->pipe;
> >  
> > +	intel_psr_pre_plane_update(state, crtc);
> > +
> >  	if (hsw_pre_update_disable_ips(old_crtc_state, new_crtc_state))
> >  		hsw_disable_ips(old_crtc_state);
> >  
> > @@ -8668,7 +8670,6 @@ static void intel_atomic_commit_tail(struct
> > intel_atomic_state *state)
> >  		intel_encoders_update_prepare(state);
> >  
> >  	intel_dbuf_pre_plane_update(state);
> > -	intel_psr_pre_plane_update(state);
> >  
> >  	for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state,
> > i) {
> >  		if (new_crtc_state->uapi.async_flip)
> > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> > b/drivers/gpu/drm/i915/display/intel_psr.c
> > index ccffe05784d3..b1e48c6be8d1 100644
> > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > @@ -1725,11 +1725,17 @@ int intel_psr2_sel_fetch_update(struct
> > intel_atomic_state *state,
> >  	return 0;
> >  }
> >  
> > -static void _intel_psr_pre_plane_update(const struct
> > intel_atomic_state *state,
> > -					const struct intel_crtc_state
> > *crtc_state)
> > +void intel_psr_pre_plane_update(struct intel_atomic_state *state,
> > +				struct intel_crtc *crtc)
> >  {
> > +	struct drm_i915_private *i915 = to_i915(state->base.dev);
> > +	const struct intel_crtc_state *crtc_state =
> > +		intel_atomic_get_new_crtc_state(state, crtc);
> >  	struct intel_encoder *encoder;
> >  
> > +	if (!HAS_PSR(i915))
> > +		return;
> > +
> >  	for_each_intel_encoder_mask_with_psr(state->base.dev, encoder,
> >  					     crtc_state-
> > >uapi.encoder_mask) {
> >  		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> > @@ -1744,6 +1750,7 @@ static void _intel_psr_pre_plane_update(const
> > struct intel_atomic_state *state,
> >  		 * - All planes will go inactive
> >  		 * - Changing between PSR versions
> >  		 */
> 
> This comment is not reflecting the code anymore.

Well, we are going to turn off all the planes for a full modeset.
So not really untrue either. But not sure the comment has any real
value anyway if it just parrots what the code says anyway.

> 
> > +		needs_to_disable |=
> > intel_crtc_needs_modeset(crtc_state);
> >  		needs_to_disable |= !crtc_state->has_psr;
> >  		needs_to_disable |= !crtc_state->active_planes;
> >  		needs_to_disable |= crtc_state->has_psr2 != psr-
> > >psr2_enabled;
> > @@ -1755,20 +1762,6 @@ static void _intel_psr_pre_plane_update(const
> > struct intel_atomic_state *state,
> >  	}
> >  }
> >  
> > -void intel_psr_pre_plane_update(const struct intel_atomic_state
> > *state)
> > -{
> > -	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> > -	struct intel_crtc_state *crtc_state;
> > -	struct intel_crtc *crtc;
> > -	int i;
> > -
> > -	if (!HAS_PSR(dev_priv))
> > -		return;
> > -
> > -	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i)
> > -		_intel_psr_pre_plane_update(state, crtc_state);
> > -}
> > -
> >  static void _intel_psr_post_plane_update(const struct
> > intel_atomic_state *state,
> >  					 const struct intel_crtc_state
> > *crtc_state)
> >  {
> > diff --git a/drivers/gpu/drm/i915/display/intel_psr.h
> > b/drivers/gpu/drm/i915/display/intel_psr.h
> > index facffbacd357..3d9c0e13c329 100644
> > --- a/drivers/gpu/drm/i915/display/intel_psr.h
> > +++ b/drivers/gpu/drm/i915/display/intel_psr.h
> > @@ -20,7 +20,8 @@ struct intel_plane;
> >  struct intel_encoder;
> >  
> >  void intel_psr_init_dpcd(struct intel_dp *intel_dp);
> > -void intel_psr_pre_plane_update(const struct intel_atomic_state
> > *state);
> > +void intel_psr_pre_plane_update(struct intel_atomic_state *state,
> > +				struct intel_crtc *crtc);
> >  void intel_psr_post_plane_update(const struct intel_atomic_state
> > *state);
> >  void intel_psr_disable(struct intel_dp *intel_dp,
> >  		       const struct intel_crtc_state *old_crtc_state);
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 2b97c8797177..5201d6cdd5db 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1429,6 +1429,8 @@  static void intel_pre_plane_update(struct intel_atomic_state *state,
 		intel_atomic_get_new_crtc_state(state, crtc);
 	enum pipe pipe = crtc->pipe;
 
+	intel_psr_pre_plane_update(state, crtc);
+
 	if (hsw_pre_update_disable_ips(old_crtc_state, new_crtc_state))
 		hsw_disable_ips(old_crtc_state);
 
@@ -8668,7 +8670,6 @@  static void intel_atomic_commit_tail(struct intel_atomic_state *state)
 		intel_encoders_update_prepare(state);
 
 	intel_dbuf_pre_plane_update(state);
-	intel_psr_pre_plane_update(state);
 
 	for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
 		if (new_crtc_state->uapi.async_flip)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index ccffe05784d3..b1e48c6be8d1 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1725,11 +1725,17 @@  int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 	return 0;
 }
 
-static void _intel_psr_pre_plane_update(const struct intel_atomic_state *state,
-					const struct intel_crtc_state *crtc_state)
+void intel_psr_pre_plane_update(struct intel_atomic_state *state,
+				struct intel_crtc *crtc)
 {
+	struct drm_i915_private *i915 = to_i915(state->base.dev);
+	const struct intel_crtc_state *crtc_state =
+		intel_atomic_get_new_crtc_state(state, crtc);
 	struct intel_encoder *encoder;
 
+	if (!HAS_PSR(i915))
+		return;
+
 	for_each_intel_encoder_mask_with_psr(state->base.dev, encoder,
 					     crtc_state->uapi.encoder_mask) {
 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
@@ -1744,6 +1750,7 @@  static void _intel_psr_pre_plane_update(const struct intel_atomic_state *state,
 		 * - All planes will go inactive
 		 * - Changing between PSR versions
 		 */
+		needs_to_disable |= intel_crtc_needs_modeset(crtc_state);
 		needs_to_disable |= !crtc_state->has_psr;
 		needs_to_disable |= !crtc_state->active_planes;
 		needs_to_disable |= crtc_state->has_psr2 != psr->psr2_enabled;
@@ -1755,20 +1762,6 @@  static void _intel_psr_pre_plane_update(const struct intel_atomic_state *state,
 	}
 }
 
-void intel_psr_pre_plane_update(const struct intel_atomic_state *state)
-{
-	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
-	struct intel_crtc_state *crtc_state;
-	struct intel_crtc *crtc;
-	int i;
-
-	if (!HAS_PSR(dev_priv))
-		return;
-
-	for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i)
-		_intel_psr_pre_plane_update(state, crtc_state);
-}
-
 static void _intel_psr_post_plane_update(const struct intel_atomic_state *state,
 					 const struct intel_crtc_state *crtc_state)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h
index facffbacd357..3d9c0e13c329 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.h
+++ b/drivers/gpu/drm/i915/display/intel_psr.h
@@ -20,7 +20,8 @@  struct intel_plane;
 struct intel_encoder;
 
 void intel_psr_init_dpcd(struct intel_dp *intel_dp);
-void intel_psr_pre_plane_update(const struct intel_atomic_state *state);
+void intel_psr_pre_plane_update(struct intel_atomic_state *state,
+				struct intel_crtc *crtc);
 void intel_psr_post_plane_update(const struct intel_atomic_state *state);
 void intel_psr_disable(struct intel_dp *intel_dp,
 		       const struct intel_crtc_state *old_crtc_state);