> -----Original Message-----
> From: Kahola, Mika
> Sent: Wednesday, April 18, 2018 5:39 PM
> To: Srinivas, Vidya <vidya.srini...@intel.com>; intel-
> g...@lists.freedesktop.org
> Subject: Re: [Intel-gfx] [PATCH v4 6/6] drm/i915: Add
> skl_check_nv12_surface for NV12
>
> On Wed, 2018-04-18 at 09:38 +0530, Vidya Srinivas wrote:
> > From: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> >
> > We skip src trunction/adjustments for
> > NV12 case and handle the sizes directly.
> > Without this, pipe fifo underruns are seen on APL/KBL.
> >
> > v2: For NV12, making the src coordinates multiplier of 4
> >
> > v3: Moving all the src coords handling code for NV12 to
> > skl_check_nv12_surface
> The patch looks good to me.
>
> Reviewed-by: Mika Kahola <mika.kah...@intel.com>
Thank you. Will add the RB in next push.
Regards
Vidya
>
> >
> > Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> > Signed-off-by: Vidya Srinivas <vidya.srini...@intel.com>
> > ---
> > drivers/gpu/drm/i915/intel_display.c | 39
> > ++++++++++++++++++++++++++++++++++++
> > drivers/gpu/drm/i915/intel_sprite.c | 15 ++++++++++----
> > 2 files changed, 50 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_display.c
> > b/drivers/gpu/drm/i915/intel_display.c
> > index 925402e..b8dbaca 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -3118,6 +3118,42 @@ static int skl_check_main_surface(const struct
> > intel_crtc_state *crtc_state,
> > return 0;
> > }
> >
> > +static int
> > +skl_check_nv12_surface(const struct intel_crtc_state *crtc_state,
> > + struct intel_plane_state *plane_state) {
> > + int crtc_x2 = plane_state->base.crtc_x + plane_state-
> > >base.crtc_w;
> > + int crtc_y2 = plane_state->base.crtc_y + plane_state-
> > >base.crtc_h;
> > +
> > + if (((plane_state->base.src_x >> 16) % 4) != 0 ||
> > + ((plane_state->base.src_y >> 16) % 4) != 0 ||
> > + ((plane_state->base.src_w >> 16) % 4) != 0 ||
> > + ((plane_state->base.src_h >> 16) % 4) != 0) {
> > + DRM_DEBUG_KMS("src coords must be multiple of 4 for
> > NV12\n");
> > + return -EINVAL;
> > + }
> > +
> > + /* Clipping would cause a 1-3 pixel gap at the edge of the
> > screen? */
> > + if ((crtc_x2 > crtc_state->pipe_src_w && crtc_state-
> > >pipe_src_w % 4) ||
> > + (crtc_y2 > crtc_state->pipe_src_h && crtc_state-
> > >pipe_src_h % 4)) {
> > + DRM_DEBUG_KMS("It's not possible to clip %u,%u to
> > %u,%u\n",
> > + crtc_x2, crtc_y2,
> > + crtc_state->pipe_src_w, crtc_state-
> > >pipe_src_h);
> > + return -EINVAL;
> > + }
> > +
> > + plane_state->base.src.x1 =
> > + DIV_ROUND_CLOSEST(plane_state->base.src.x1, 1 << 18)
> > << 18;
> > + plane_state->base.src.x2 =
> > + DIV_ROUND_CLOSEST(plane_state->base.src.x2, 1 << 18)
> > << 18;
> > + plane_state->base.src.y1 =
> > + DIV_ROUND_CLOSEST(plane_state->base.src.y1, 1 << 18)
> > << 18;
> > + plane_state->base.src.y2 =
> > + DIV_ROUND_CLOSEST(plane_state->base.src.y2, 1 << 18)
> > << 18;
> > +
> > + return 0;
> > +}
> > +
> > static int skl_check_nv12_aux_surface(struct intel_plane_state
> > *plane_state)
> > {
> > const struct drm_framebuffer *fb = plane_state->base.fb; @@ -
> 3201,6
> > +3237,9 @@ int skl_check_plane_surface(const struct intel_crtc_state
> > *crtc_state,
> > * the main surface setup depends on it.
> > */
> > if (fb->format->format == DRM_FORMAT_NV12) {
> > + ret = skl_check_nv12_surface(crtc_state,
> > plane_state);
> > + if (ret)
> > + return ret;
> > ret = skl_check_nv12_aux_surface(plane_state);
> > if (ret)
> > return ret;
> > diff --git a/drivers/gpu/drm/i915/intel_sprite.c
> > b/drivers/gpu/drm/i915/intel_sprite.c
> > index 8b7947d..f9985fb 100644
> > --- a/drivers/gpu/drm/i915/intel_sprite.c
> > +++ b/drivers/gpu/drm/i915/intel_sprite.c
> > @@ -1035,10 +1035,17 @@ intel_check_sprite_plane(struct intel_plane
> > *plane,
> > return vscale;
> > }
> >
> > - /* Make the source viewport size an exact multiple
> > of the scaling factors. */
> > - drm_rect_adjust_size(src,
> > - drm_rect_width(dst) * hscale -
> > drm_rect_width(src),
> > - drm_rect_height(dst) * vscale -
> > drm_rect_height(src));
> > + if (fb->format->format != DRM_FORMAT_NV12) {
> > + /*
> > + * Make the source viewport size
> > + * an exact multiple of the scaling factors
> > + */
> > + drm_rect_adjust_size(src,
> > + (drm_rect_width(dst) *
> > hscale -
> > + drm_rect_width(src)),
> > + (drm_rect_height(dst) *
> > vscale -
> > + drm_rect_height(src)))
> > ;
> > + }
> >
> > drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16,
> > state->base.rotation);
> --
> Mika Kahola - Intel OTC
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