Op 10-05-18 om 10:31 schreef Vidya Srinivas:
> From: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
>
> 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
>
> v4: Added RB from Mika
>
> v5: Rebased the series. Removed checks of mult of 4 in
> skl_update_scaler, Added NV12 condition in intel_check_sprite_plane
> where src x/w is being checked for mult of 2 for yuv planes.
>
> Reviewed-by: Mika Kahola <mika.kahola@xxxxxxxxx>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Signed-off-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_display.c | 42 ++++++++++++++++++++++++++++++++++--
> drivers/gpu/drm/i915/intel_sprite.c | 1 +
> 2 files changed, 41 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index dfca71e..cca46f9 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3102,6 +3102,42 @@ 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;
> + }
Oops, wrong checks here..
skl_check_nv12_surface is only needed for Display WA #1106, so check might need to be something like:
static int
skl_check_nv12_surface(const struct intel_crtc_state *crtc_state,
struct intel_plane_state *plane_state)
{
/* Display WA #1106 */
if (plane_state->base.rotation != (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90) &&
plane_state->base.rotation != DRM_MODE_ROTATE_270)
return 0;
/* src coordinates are rotated here. We check height but report it as width. */
if (((drm_rect_height(&plane_state->base.src) >> 16) % 4) != 0) {
DRM_DEBUG_KMS("src width must be multiple of 4 for rotated NV12\n");
return -EINVAL;
}
return 0;
}
Would this hit FIFO underruns?
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