On Thu, Sep 23, 2021 at 12:46:13PM -0700, José Roberto de Souza wrote: > intel_prepare_plane_fb() was calling i915_gem_object_flush_frontbuffer() > with the generic ORIGIN_DIRTYFB, what was causing > PSR, FBC and DRRS to do their frontbuffer rendering in a framebuffer > that will be flipped. > > Not handling this call as frontbuffer rendering allow us to save > more power with all 3 features. > > Same applies when allocating a framebuffer for fbdev emulation, after > allocation userspace will draw on it and trigger invaldate/flush calls > with ORIGIN_DIRTYFB. > > Cc: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx> > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx> > --- > drivers/gpu/drm/i915/display/intel_display.c | 2 +- > drivers/gpu/drm/i915/display/intel_drrs.c | 5 ++++- > drivers/gpu/drm/i915/display/intel_drrs.h | 4 +++- > drivers/gpu/drm/i915/display/intel_fbc.c | 2 +- > drivers/gpu/drm/i915/display/intel_fbdev.c | 2 +- > drivers/gpu/drm/i915/display/intel_frontbuffer.c | 2 +- > drivers/gpu/drm/i915/display/intel_frontbuffer.h | 1 + > drivers/gpu/drm/i915/display/intel_psr.c | 5 ++++- > 8 files changed, 16 insertions(+), 7 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c > index f27c294beb926..ecf8c69473e38 100644 > --- a/drivers/gpu/drm/i915/display/intel_display.c > +++ b/drivers/gpu/drm/i915/display/intel_display.c > @@ -10666,7 +10666,7 @@ intel_prepare_plane_fb(struct drm_plane *_plane, > return ret; > > i915_gem_object_wait_priority(obj, 0, &attr); > - i915_gem_object_flush_frontbuffer(obj, ORIGIN_DIRTYFB); > + i915_gem_object_flush_frontbuffer(obj, ORIGIN_PREPARE_FB); I think this should just get nuked. See https://patchwork.freedesktop.org/patch/432166/?series=89824&rev=1 Unfortunately I wasn't able to get past glk's semi-borked FBC with that yet. > > if (!new_plane_state->uapi.fence) { /* implicit fencing */ > struct dma_fence *fence; > diff --git a/drivers/gpu/drm/i915/display/intel_drrs.c b/drivers/gpu/drm/i915/display/intel_drrs.c > index c1439fcb5a959..46828222a098b 100644 > --- a/drivers/gpu/drm/i915/display/intel_drrs.c > +++ b/drivers/gpu/drm/i915/display/intel_drrs.c > @@ -373,8 +373,11 @@ void intel_drrs_invalidate(struct drm_i915_private *dev_priv, > * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits. > */ > void intel_drrs_flush(struct drm_i915_private *dev_priv, > - unsigned int frontbuffer_bits) > + unsigned int frontbuffer_bits, enum fb_op_origin origin) > { > + if (origin == ORIGIN_PREPARE_FB) > + return; > + > intel_drrs_frontbuffer_update(dev_priv, frontbuffer_bits, false); > } > > diff --git a/drivers/gpu/drm/i915/display/intel_drrs.h b/drivers/gpu/drm/i915/display/intel_drrs.h > index 9ec9c447211af..e69528a98a9c2 100644 > --- a/drivers/gpu/drm/i915/display/intel_drrs.h > +++ b/drivers/gpu/drm/i915/display/intel_drrs.h > @@ -8,6 +8,8 @@ > > #include <linux/types.h> > > +#include "intel_frontbuffer.h" > + > struct drm_i915_private; > struct intel_atomic_state; > struct intel_crtc; > @@ -24,7 +26,7 @@ void intel_drrs_update(struct intel_dp *intel_dp, > void intel_drrs_invalidate(struct drm_i915_private *dev_priv, > unsigned int frontbuffer_bits); > void intel_drrs_flush(struct drm_i915_private *dev_priv, > - unsigned int frontbuffer_bits); > + unsigned int frontbuffer_bits, enum fb_op_origin origin); > void intel_drrs_page_flip(struct intel_atomic_state *state, > struct intel_crtc *crtc); > void intel_drrs_compute_config(struct intel_dp *intel_dp, > diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c > index b1c1a23c36be3..56c2de2994602 100644 > --- a/drivers/gpu/drm/i915/display/intel_fbc.c > +++ b/drivers/gpu/drm/i915/display/intel_fbc.c > @@ -1155,7 +1155,7 @@ void intel_fbc_flush(struct drm_i915_private *dev_priv, > > fbc->busy_bits &= ~frontbuffer_bits; > > - if (origin == ORIGIN_FLIP) > + if (origin == ORIGIN_FLIP || origin == ORIGIN_PREPARE_FB) > goto out; > > if (!fbc->busy_bits && fbc->crtc && > diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c > index 60d3ded270476..3097658938ae2 100644 > --- a/drivers/gpu/drm/i915/display/intel_fbdev.c > +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c > @@ -230,7 +230,7 @@ static int intelfb_create(struct drm_fb_helper *helper, > goto out_unlock; > } > > - intel_frontbuffer_flush(to_frontbuffer(ifbdev), ORIGIN_DIRTYFB); > + intel_frontbuffer_flush(to_frontbuffer(ifbdev), ORIGIN_PREPARE_FB); > > info = drm_fb_helper_alloc_fbi(helper); > if (IS_ERR(info)) { > diff --git a/drivers/gpu/drm/i915/display/intel_frontbuffer.c b/drivers/gpu/drm/i915/display/intel_frontbuffer.c > index 0492446cd04ad..a88c147d6b523 100644 > --- a/drivers/gpu/drm/i915/display/intel_frontbuffer.c > +++ b/drivers/gpu/drm/i915/display/intel_frontbuffer.c > @@ -92,7 +92,7 @@ static void frontbuffer_flush(struct drm_i915_private *i915, > trace_intel_frontbuffer_flush(frontbuffer_bits, origin); > > might_sleep(); > - intel_drrs_flush(i915, frontbuffer_bits); > + intel_drrs_flush(i915, frontbuffer_bits, origin); > intel_psr_flush(i915, frontbuffer_bits, origin); > intel_fbc_flush(i915, frontbuffer_bits, origin); > } > diff --git a/drivers/gpu/drm/i915/display/intel_frontbuffer.h b/drivers/gpu/drm/i915/display/intel_frontbuffer.h > index 4b977c1e4d52b..950030950b0f9 100644 > --- a/drivers/gpu/drm/i915/display/intel_frontbuffer.h > +++ b/drivers/gpu/drm/i915/display/intel_frontbuffer.h > @@ -37,6 +37,7 @@ enum fb_op_origin { > ORIGIN_CS, > ORIGIN_FLIP, > ORIGIN_DIRTYFB, > + ORIGIN_PREPARE_FB, > }; > > struct intel_frontbuffer { > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c > index ba2da689920f9..1cc4130dec7b1 100644 > --- a/drivers/gpu/drm/i915/display/intel_psr.c > +++ b/drivers/gpu/drm/i915/display/intel_psr.c > @@ -2073,7 +2073,7 @@ void intel_psr_invalidate(struct drm_i915_private *dev_priv, > { > struct intel_encoder *encoder; > > - if (origin == ORIGIN_FLIP) > + if (origin == ORIGIN_FLIP || origin == ORIGIN_PREPARE_FB) > return; > > for_each_intel_encoder_with_psr(&dev_priv->drm, encoder) { > @@ -2148,6 +2148,9 @@ void intel_psr_flush(struct drm_i915_private *dev_priv, > { > struct intel_encoder *encoder; > > + if (origin == ORIGIN_PREPARE_FB) > + return; > + > for_each_intel_encoder_with_psr(&dev_priv->drm, encoder) { > unsigned int pipe_frontbuffer_bits = frontbuffer_bits; > struct intel_dp *intel_dp = enc_to_intel_dp(encoder); > -- > 2.33.0 -- Ville Syrjälä Intel
