>-----Original Message-----
>From: Intel-gfx <intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Ville Syrjala
>Sent: Tuesday, October 8, 2019 9:45 PM
>To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>Subject: [PATCH 7/9] drm/i915: Reject ckey+fp16 on skl+
>
>From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
>According to the spec color keying is not supported with
>fp16 pixel formats on skl+. Reject that combo.
>
>Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>---
> drivers/gpu/drm/i915/display/intel_sprite.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
>diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c
>b/drivers/gpu/drm/i915/display/intel_sprite.c
>index cc9e5c9668b1..d6cd46e3f738 100644
>--- a/drivers/gpu/drm/i915/display/intel_sprite.c
>+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
>@@ -1689,6 +1689,19 @@ vlv_sprite_check(struct intel_crtc_state *crtc_state,
> return 0;
> }
>
>+static bool format_is_fp16(u32 format)
>+{
>+ switch (format) {
>+ case DRM_FORMAT_XRGB16161616F:
>+ case DRM_FORMAT_XBGR16161616F:
>+ case DRM_FORMAT_ARGB16161616F:
>+ case DRM_FORMAT_ABGR16161616F:
>+ return true;
>+ default:
>+ return false;
>+ }
>+}
>+
> static int skl_plane_check_fb(const struct intel_crtc_state *crtc_state,
> const struct intel_plane_state *plane_state) { @@ -
>1760,6 +1773,11 @@ static int skl_plane_check_fb(const struct intel_crtc_state
>*crtc_state,
> return -EINVAL;
> }
>
>+ if (plane_state->ckey.flags && format_is_fp16(fb->format->format)) {
>+ DRM_DEBUG_KMS("Color keying not supported with fp16
>formats\n");
It seems even "Indexed 8 bit formats" also don't support Color Keying. May be you can extend it to
even C8.
>+ return -EINVAL;
>+ }
>+
> return 0;
> }
>
>--
>2.21.0
>
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