Re: [PATCH] drm/xe/display: Disable aux ccs framebuffers

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On Tue, Jan 02, 2024 at 09:44:48PM +0200, Jani Nikula wrote:
> On Tue, 02 Jan 2024, Juha-Pekka Heikkila <juhapekka.heikkila@xxxxxxxxx> wrote:
> > Aux ccs framebuffers don't work on Xe driver hence disable them
> > from plane capabilities until they are fixed. Flat ccs framebuffers
> > work and they are left enabled. Here is separated plane capabilities
> > check on i915 so it can behave differencly depending on the driver.
> 
> Cc: Rodrigo and xe maintainers
> 
> We need to figure out the proper workflow, the mailing lists to use, the
> subject prefix to use, the acks to require, etc, for changes touching
> both xe and i915.
> 
> I'd very much prefer changes to i915 display to be merged via
> drm-intel-next as always. For one thing, it'll take a while to sync
> stuff back from drm-xe-next to drm-intel-next, and most display
> development still happens on drm-intel-next.

I fully agree with you.

> 
> But this patch can't be applied to drm-intel-next, because xe doesn't
> even exist on drm-intel-next yet...

should we do a backmerge of drm-next already, or too early for that?

> 
> 
> BR,
> Jani.
> 
> 
> >
> > Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/933
> > Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@xxxxxxxxx>
> > ---
> >  drivers/gpu/drm/i915/Makefile                 |  1 +
> >  .../gpu/drm/i915/display/intel_plane_caps.c   | 68 +++++++++++++++++++
> >  .../gpu/drm/i915/display/intel_plane_caps.h   | 14 ++++
> >  .../drm/i915/display/skl_universal_plane.c    | 61 +----------------
> >  drivers/gpu/drm/xe/display/xe_plane_initial.c | 23 +++++++
> >  5 files changed, 107 insertions(+), 60 deletions(-)
> >  create mode 100644 drivers/gpu/drm/i915/display/intel_plane_caps.c
> >  create mode 100644 drivers/gpu/drm/i915/display/intel_plane_caps.h
> >
> > diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> > index e777686190ca..c5e3c2dd0a01 100644
> > --- a/drivers/gpu/drm/i915/Makefile
> > +++ b/drivers/gpu/drm/i915/Makefile
> > @@ -302,6 +302,7 @@ i915-y += \
> >  	display/intel_overlay.o \
> >  	display/intel_pch_display.o \
> >  	display/intel_pch_refclk.o \
> > +	display/intel_plane_caps.o \
> >  	display/intel_plane_initial.o \
> >  	display/intel_pmdemand.o \
> >  	display/intel_psr.o \
> > diff --git a/drivers/gpu/drm/i915/display/intel_plane_caps.c b/drivers/gpu/drm/i915/display/intel_plane_caps.c
> > new file mode 100644
> > index 000000000000..6206ae11f296
> > --- /dev/null
> > +++ b/drivers/gpu/drm/i915/display/intel_plane_caps.c
> > @@ -0,0 +1,68 @@
> > +// SPDX-License-Identifier: MIT
> > +/*
> > + * Copyright © 2024 Intel Corporation
> > + */
> > +
> > +#include "i915_drv.h"
> > +#include "intel_fb.h"
> > +#include "intel_plane_caps.h"
> > +
> > +static bool skl_plane_has_rc_ccs(struct drm_i915_private *i915,
> > +				 enum pipe pipe, enum plane_id plane_id)
> > +{
> > +	/* Wa_22011186057 */
> > +	if (IS_ALDERLAKE_P(i915) && IS_DISPLAY_STEP(i915, STEP_A0, STEP_B0))
> > +		return false;
> > +
> > +	if (DISPLAY_VER(i915) >= 11)
> > +		return true;
> > +
> > +	if (IS_GEMINILAKE(i915))
> > +		return pipe != PIPE_C;
> > +
> > +	return pipe != PIPE_C &&
> > +		(plane_id == PLANE_PRIMARY ||
> > +		 plane_id == PLANE_SPRITE0);
> > +}
> > +
> > +static bool gen12_plane_has_mc_ccs(struct drm_i915_private *i915,
> > +				   enum plane_id plane_id)
> > +{
> > +	if (DISPLAY_VER(i915) < 12)
> > +		return false;
> > +
> > +	/* Wa_14010477008 */
> > +	if (IS_DG1(i915) || IS_ROCKETLAKE(i915) ||
> > +	    (IS_TIGERLAKE(i915) && IS_DISPLAY_STEP(i915, STEP_A0, STEP_D0)))
> > +		return false;
> > +
> > +	/* Wa_22011186057 */
> > +	if (IS_ALDERLAKE_P(i915) && IS_DISPLAY_STEP(i915, STEP_A0, STEP_B0))
> > +		return false;
> > +
> > +	return plane_id < PLANE_SPRITE4;
> > +}
> > +
> > +u8 skl_get_plane_caps(struct drm_i915_private *i915,
> > +		      enum pipe pipe, enum plane_id plane_id)
> > +{
> > +	u8 caps = INTEL_PLANE_CAP_TILING_X;
> > +
> > +	if (DISPLAY_VER(i915) < 13 || IS_ALDERLAKE_P(i915))
> > +		caps |= INTEL_PLANE_CAP_TILING_Y;
> > +	if (DISPLAY_VER(i915) < 12)
> > +		caps |= INTEL_PLANE_CAP_TILING_Yf;
> > +	if (HAS_4TILE(i915))
> > +		caps |= INTEL_PLANE_CAP_TILING_4;
> > +
> > +	if (skl_plane_has_rc_ccs(i915, pipe, plane_id)) {
> > +		caps |= INTEL_PLANE_CAP_CCS_RC;
> > +		if (DISPLAY_VER(i915) >= 12)
> > +			caps |= INTEL_PLANE_CAP_CCS_RC_CC;
> > +	}
> > +
> > +	if (gen12_plane_has_mc_ccs(i915, plane_id))
> > +		caps |= INTEL_PLANE_CAP_CCS_MC;
> > +
> > +	return caps;
> > +}
> > diff --git a/drivers/gpu/drm/i915/display/intel_plane_caps.h b/drivers/gpu/drm/i915/display/intel_plane_caps.h
> > new file mode 100644
> > index 000000000000..60a941c76f23
> > --- /dev/null
> > +++ b/drivers/gpu/drm/i915/display/intel_plane_caps.h
> > @@ -0,0 +1,14 @@
> > +/* SPDX-License-Identifier: MIT */
> > +/*
> > + * Copyright © 2024 Intel Corporation
> > + */
> > +
> > +#ifndef __INTEL_PLANE_CAPS_H__
> > +#define __INTEL_PLANE_CAPS_H__
> > +
> > +#include "intel_display_types.h"
> > +
> > +u8 skl_get_plane_caps(struct drm_i915_private *i915,
> > +		      enum pipe pipe, enum plane_id plane_id);
> > +
> > +#endif /* __INTEL_PLANE_CAPS_H__ */
> > diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > index 511dc1544854..f2fd3833c61d 100644
> > --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > @@ -17,6 +17,7 @@
> >  #include "intel_fb.h"
> >  #include "intel_fbc.h"
> >  #include "intel_frontbuffer.h"
> > +#include "intel_plane_caps.h"
> >  #include "intel_psr.h"
> >  #include "intel_psr_regs.h"
> >  #include "skl_scaler.h"
> > @@ -2242,66 +2243,6 @@ skl_plane_disable_flip_done(struct intel_plane *plane)
> >  	spin_unlock_irq(&i915->irq_lock);
> >  }
> >  
> > -static bool skl_plane_has_rc_ccs(struct drm_i915_private *i915,
> > -				 enum pipe pipe, enum plane_id plane_id)
> > -{
> > -	/* Wa_22011186057 */
> > -	if (IS_ALDERLAKE_P(i915) && IS_DISPLAY_STEP(i915, STEP_A0, STEP_B0))
> > -		return false;
> > -
> > -	if (DISPLAY_VER(i915) >= 11)
> > -		return true;
> > -
> > -	if (IS_GEMINILAKE(i915))
> > -		return pipe != PIPE_C;
> > -
> > -	return pipe != PIPE_C &&
> > -		(plane_id == PLANE_PRIMARY ||
> > -		 plane_id == PLANE_SPRITE0);
> > -}
> > -
> > -static bool gen12_plane_has_mc_ccs(struct drm_i915_private *i915,
> > -				   enum plane_id plane_id)
> > -{
> > -	if (DISPLAY_VER(i915) < 12)
> > -		return false;
> > -
> > -	/* Wa_14010477008 */
> > -	if (IS_DG1(i915) || IS_ROCKETLAKE(i915) ||
> > -		(IS_TIGERLAKE(i915) && IS_DISPLAY_STEP(i915, STEP_A0, STEP_D0)))
> > -		return false;
> > -
> > -	/* Wa_22011186057 */
> > -	if (IS_ALDERLAKE_P(i915) && IS_DISPLAY_STEP(i915, STEP_A0, STEP_B0))
> > -		return false;
> > -
> > -	return plane_id < PLANE_SPRITE4;
> > -}
> > -
> > -static u8 skl_get_plane_caps(struct drm_i915_private *i915,
> > -			     enum pipe pipe, enum plane_id plane_id)
> > -{
> > -	u8 caps = INTEL_PLANE_CAP_TILING_X;
> > -
> > -	if (DISPLAY_VER(i915) < 13 || IS_ALDERLAKE_P(i915))
> > -		caps |= INTEL_PLANE_CAP_TILING_Y;
> > -	if (DISPLAY_VER(i915) < 12)
> > -		caps |= INTEL_PLANE_CAP_TILING_Yf;
> > -	if (HAS_4TILE(i915))
> > -		caps |= INTEL_PLANE_CAP_TILING_4;
> > -
> > -	if (skl_plane_has_rc_ccs(i915, pipe, plane_id)) {
> > -		caps |= INTEL_PLANE_CAP_CCS_RC;
> > -		if (DISPLAY_VER(i915) >= 12)
> > -			caps |= INTEL_PLANE_CAP_CCS_RC_CC;
> > -	}
> > -
> > -	if (gen12_plane_has_mc_ccs(i915, plane_id))
> > -		caps |= INTEL_PLANE_CAP_CCS_MC;
> > -
> > -	return caps;
> > -}
> > -
> >  struct intel_plane *
> >  skl_universal_plane_create(struct drm_i915_private *dev_priv,
> >  			   enum pipe pipe, enum plane_id plane_id)
> > diff --git a/drivers/gpu/drm/xe/display/xe_plane_initial.c b/drivers/gpu/drm/xe/display/xe_plane_initial.c
> > index ccf83c12b545..425c6e6744a6 100644
> > --- a/drivers/gpu/drm/xe/display/xe_plane_initial.c
> > +++ b/drivers/gpu/drm/xe/display/xe_plane_initial.c
> > @@ -15,6 +15,7 @@
> >  #include "intel_fb.h"
> >  #include "intel_fb_pin.h"
> >  #include "intel_frontbuffer.h"
> > +#include "intel_plane_caps.h"
> >  #include "intel_plane_initial.h"
> >  
> >  static bool
> > @@ -289,3 +290,25 @@ void intel_crtc_initial_plane_config(struct intel_crtc *crtc)
> >  
> >  	plane_config_fini(&plane_config);
> >  }
> > +
> > +u8 skl_get_plane_caps(struct drm_i915_private *i915,
> > +		      enum pipe pipe, enum plane_id plane_id)
> > +{
> > +	u8 caps = INTEL_PLANE_CAP_TILING_X;
> > +
> > +	if (DISPLAY_VER(i915) < 13 || IS_ALDERLAKE_P(i915))
> > +		caps |= INTEL_PLANE_CAP_TILING_Y;
> > +	if (DISPLAY_VER(i915) < 12)
> > +		caps |= INTEL_PLANE_CAP_TILING_Yf;
> > +	if (HAS_4TILE(i915))
> > +		caps |= INTEL_PLANE_CAP_TILING_4;
> > +
> > +	if (HAS_FLAT_CCS(i915)) {
> > +		caps |= INTEL_PLANE_CAP_CCS_RC | INTEL_PLANE_CAP_CCS_RC_CC;
> > +
> > +		if (plane_id < PLANE_SPRITE4)
> > +			caps |= INTEL_PLANE_CAP_CCS_MC;
> > +	}
> > +
> > +	return caps;
> > +}
> 
> -- 
> Jani Nikula, Intel



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