On Wed, Feb 10, 2016 at 11:39:41AM -0800, Matt Roper wrote:
> On Wed, Jan 27, 2016 at 09:40:01PM +0530, Shobhit Kumar wrote:
> > From: "Kumar, Mahesh" <mahesh1.ku...@intel.com>
> >
> > if downscaling is enabled plane data rate increases according to scaling
> > amount. take scaling amount under consideration while calculating plane
> > data rate
> >
> > v2: Address Matt's comments, where data rate was overridden because of
> > missing else.
> >
> > Cc: matthew.d.ro...@intel.com
> > Signed-off-by: Kumar, Mahesh <mahesh1.ku...@intel.com>
> > ---
> > drivers/gpu/drm/i915/intel_pm.c | 17 ++++++++++++-----
> > 1 file changed, 12 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_pm.c
> > b/drivers/gpu/drm/i915/intel_pm.c
> > index 40fff09..a9f9396 100644
> > --- a/drivers/gpu/drm/i915/intel_pm.c
> > +++ b/drivers/gpu/drm/i915/intel_pm.c
> > @@ -2912,6 +2912,8 @@ skl_plane_relative_data_rate(const struct
> > intel_crtc_state *cstate,
> > {
> > struct intel_plane_state *intel_pstate = to_intel_plane_state(pstate);
> > struct drm_framebuffer *fb = pstate->fb;
> > + struct intel_plane *intel_plane = to_intel_plane(pstate->plane);
> > + uint32_t down_scale_amount, data_rate;
> > uint32_t width = 0, height = 0;
> >
> > width = drm_rect_width(&intel_pstate->src) >> 16;
> > @@ -2923,15 +2925,20 @@ skl_plane_relative_data_rate(const struct
> > intel_crtc_state *cstate,
> > /* for planar format */
> > if (fb->pixel_format == DRM_FORMAT_NV12) {
> > if (y) /* y-plane data rate */
> > - return width * height *
> > + data_rate = width * height *
> > drm_format_plane_cpp(fb->pixel_format, 0);
> > else /* uv-plane data rate */
> > - return (width / 2) * (height / 2) *
> > + data_rate = (width / 2) * (height / 2) *
> > drm_format_plane_cpp(fb->pixel_format, 1);
> > - }
> > + } else
> > + /* for packed formats */
> > + data_rate = width * height *
> > + drm_format_plane_cpp(fb->pixel_format, 0);
>
> According to the coding style, I believe we're supposed to use braces
> for both branches if either one of them needs braces.
Yes, and definitely when the other branch spans more than 1 line.
-Daniel
>
> Aside from that,
>
> Reviewed-by: Matt Roper <matthew.d.ro...@intel.com>
>
> > +
> > + down_scale_amount = skl_plane_downscale_amount(intel_plane);
> > +
> > + return DIV_ROUND_UP((data_rate * down_scale_amount), 1000);
> >
> > - /* for packed formats */
> > - return width * height * drm_format_plane_cpp(fb->pixel_format, 0);
> > }
> >
> > /*
> > --
> > 2.5.0
> >
>
> --
> Matt Roper
> Graphics Software Engineer
> IoTG Platform Enabling & Development
> Intel Corporation
> (916) 356-2795
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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