On Thu, 01 Apr 2021, Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
> On Thu, Apr 01, 2021 at 03:55:20PM +0300, Jani Nikula wrote:
>> On Tue, 30 Mar 2021, Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
>> > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>> >
>> > Replace the hand rolled pfit downscale calculations with
>> > intel_adjusted_rate().
>> >
>> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>> > ---
>> > .../gpu/drm/i915/display/intel_atomic_plane.c | 6 ++---
>> > .../gpu/drm/i915/display/intel_atomic_plane.h | 4 ++++
>> > drivers/gpu/drm/i915/display/intel_display.c | 23 +++++--------------
>> > 3 files changed, 13 insertions(+), 20 deletions(-)
>> >
>> > diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
>> > index 3f830b70b0c1..5f0a5ea474eb 100644
>> > --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
>> > +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
>> > @@ -133,9 +133,9 @@ intel_plane_destroy_state(struct drm_plane *plane,
>> > kfree(plane_state);
>> > }
>> >
>> > -static unsigned int intel_adjusted_rate(const struct drm_rect *src,
>> > - const struct drm_rect *dst,
>> > - unsigned int rate)
>> > +unsigned int intel_adjusted_rate(const struct drm_rect *src,
>> > + const struct drm_rect *dst,
>> > + unsigned int rate)
>> > {
>> > unsigned int src_w, src_h, dst_w, dst_h;
>> >
>> > diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.h b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
>> > index 5c78a087ed86..dc4d05e75e1c 100644
>> > --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.h
>> > +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
>> > @@ -10,6 +10,7 @@
>> >
>> > struct drm_plane;
>> > struct drm_property;
>> > +struct drm_rect;
>> > struct intel_atomic_state;
>> > struct intel_crtc;
>> > struct intel_crtc_state;
>> > @@ -18,6 +19,9 @@ struct intel_plane_state;
>> >
>> > extern const struct drm_plane_helper_funcs intel_plane_helper_funcs;
>> >
>> > +unsigned int intel_adjusted_rate(const struct drm_rect *src,
>> > + const struct drm_rect *dst,
>> > + unsigned int rate);
>> > unsigned int intel_plane_pixel_rate(const struct intel_crtc_state *crtc_state,
>> > const struct intel_plane_state *plane_state);
>> >
>> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
>> > index d74b263c5f4e..472e691286c6 100644
>> > --- a/drivers/gpu/drm/i915/display/intel_display.c
>> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
>> > @@ -3978,7 +3978,7 @@ static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc)
>> > static u32 ilk_pipe_pixel_rate(const struct intel_crtc_state *crtc_state)
>> > {
>> > u32 pixel_rate = crtc_state->hw.pipe_mode.crtc_clock;
>> > - unsigned int pipe_w, pipe_h, pfit_w, pfit_h;
>> > + struct drm_rect src;
>> >
>> > /*
>> > * We only use IF-ID interlacing. If we ever use
>> > @@ -3988,23 +3988,12 @@ static u32 ilk_pipe_pixel_rate(const struct intel_crtc_state *crtc_state)
>> > if (!crtc_state->pch_pfit.enabled)
>> > return pixel_rate;
>> >
>> > - pipe_w = crtc_state->pipe_src_w;
>> > - pipe_h = crtc_state->pipe_src_h;
>> > + drm_rect_init(&src, 0, 0,
>> > + crtc_state->pipe_src_w << 16,
>> > + crtc_state->pipe_src_h << 16);
>> >
>> > - pfit_w = drm_rect_width(&crtc_state->pch_pfit.dst);
>> > - pfit_h = drm_rect_height(&crtc_state->pch_pfit.dst);
>> > -
>> > - if (pipe_w < pfit_w)
>> > - pipe_w = pfit_w;
>>
>> So this is src_w = max(src_w, dst_w) and gets turned into dst_w =
>> min(src_w, dst_w) instead? Ditto for _h. Does it end up being the same
>> thing after the division?
>
> Yes. The min/max just gets rid of the upscaling case,
> ie. causes the division to be just x/x==1 when dst>src.
> Doesn't matter if we use the min or max approach to
> achieve that result.
Ok, thanks.
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
--
Jani Nikula, Intel Open Source Graphics Center
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