On Fri, 2018-04-13 at 17:44 +0530, Vidya Srinivas wrote:
> 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
>
> Credits-to: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> Signed-off-by: Vidya Srinivas <vidya.srini...@intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 11 +++++++++++
> drivers/gpu/drm/i915/intel_sprite.c | 15 +++++++++++++++
> 2 files changed, 26 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index bc83f10..f64708f 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -12978,6 +12978,10 @@ intel_check_primary_plane(struct intel_plane
> *plane,
> bool can_position = false;
> int ret;
> uint32_t pixel_format = 0;
> + struct drm_plane_state *plane_state = &state->base;
> + struct drm_rect *src = &plane_state->src;
This seems unnecessary. We could use the line below to get the src's.
> +
> + *src = drm_plane_state_src(plane_state);
>
> if (INTEL_GEN(dev_priv) >= 9) {
> /* use scaler when colorkey is not required */
> @@ -13001,6 +13005,13 @@ intel_check_primary_plane(struct intel_plane
> *plane,
> if (!state->base.fb)
> return 0;
>
> + if (pixel_format == DRM_FORMAT_NV12) {
> + src->x1 = (((src->x1 >> 16)/4)*4) << 16;
> + src->x2 = (((src->x2 >> 16)/4)*4) << 16;
> + src->y1 = (((src->y1 >> 16)/4)*4) << 16;
> + src->y2 = (((src->y2 >> 16)/4)*4) << 16;
> + }
> +
> if (INTEL_GEN(dev_priv) >= 9) {
> ret = skl_check_plane_surface(crtc_state, state);
> if (ret)
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c
> b/drivers/gpu/drm/i915/intel_sprite.c
> index 8b7947d..c1dd85e 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -1035,11 +1035,20 @@ intel_check_sprite_plane(struct intel_plane
> *plane,
> return vscale;
> }
>
> + if (fb->format->format == DRM_FORMAT_NV12) {
> + if (src->x2 >> 16 == 16)
> + src->x2 = 16 << 16;
> + if (src->y2 >> 16 == 16)
> + src->y2 = 16 << 16;
> + goto nv12_min_no_clip;
> + }
> +
> /* 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));
>
> +nv12_min_no_clip:
> drm_rect_rotate_inv(src, fb->width << 16, fb->height
> << 16,
> state->base.rotation);
>
> @@ -1105,6 +1114,12 @@ intel_check_sprite_plane(struct intel_plane
> *plane,
> src->x2 = (src_x + src_w) << 16;
> src->y1 = src_y << 16;
> src->y2 = (src_y + src_h) << 16;
> + if (fb->format->format == DRM_FORMAT_NV12) {
> + src->x1 = (((src->x1 >> 16)/4)*4) << 16;
> + src->x2 = (((src->x2 >> 16)/4)*4) << 16;
> + src->y1 = (((src->y1 >> 16)/4)*4) << 16;
> + src->y2 = (((src->y2 >> 16)/4)*4) << 16;
> + }
> }
>
> dst->x1 = crtc_x;
--
Mika Kahola - Intel OTC
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