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drm/vc4: Fix the "no scaling" case on multi-planar YUV formats 

When there's no scaling requested ->is_unity should be true no matter
the format.

Also, when no scaling is requested and we have a multi-planar YUV
format, we should leave ->y_scaling[0] to VC4_SCALING_NONE and only
set ->x_scaling[0] to VC4_SCALING_PPF.

Doing this fixes an hardly visible artifact (seen when using modetest
and a rather big overlay plane in YUV420).

Fixes: fc04023faf ("drm/vc4: Add support for YUV planes.")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20180725122907.13702-1-boris.brezillon@bootlin.com
Signed-off-by: Sean Paul <seanpaul@chromium.org>
This commit is contained in:
Boris Brezillon 2018-07-25 14:29:07 +02:00 committed by Sean Paul
parent 67c6ed7cf9
commit 658d8cbd07
1 changed files with 12 additions and 13 deletions
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25
drivers/gpu/drm/vc4/vc4_plane.c
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@ -297,6 +297,9 @@ static int vc4_plane_setup_clipping_and_scaling(struct drm_plane_state *state)
vc4_state->y_scaling[0] = vc4_get_scaling_mode(vc4_state->src_h[0],
vc4_state->crtc_h);
vc4_state->is_unity = (vc4_state->x_scaling[0] == VC4_SCALING_NONE &&
vc4_state->y_scaling[0] == VC4_SCALING_NONE);
if (num_planes > 1) {
vc4_state->is_yuv = true;
@ -312,24 +315,17 @@ static int vc4_plane_setup_clipping_and_scaling(struct drm_plane_state *state)
vc4_get_scaling_mode(vc4_state->src_h[1],
vc4_state->crtc_h);
/* YUV conversion requires that scaling be enabled,
* even on a plane that's otherwise 1:1. Choose TPZ
* for simplicity.
/* YUV conversion requires that horizontal scaling be enabled,
* even on a plane that's otherwise 1:1. Looks like only PPF
* works in that case, so let's pick that one.
*/
if (vc4_state->x_scaling[0] == VC4_SCALING_NONE)
vc4_state->x_scaling[0] = VC4_SCALING_TPZ;
if (vc4_state->y_scaling[0] == VC4_SCALING_NONE)
vc4_state->y_scaling[0] = VC4_SCALING_TPZ;
if (vc4_state->is_unity)
vc4_state->x_scaling[0] = VC4_SCALING_PPF;
} else {
vc4_state->x_scaling[1] = VC4_SCALING_NONE;
vc4_state->y_scaling[1] = VC4_SCALING_NONE;
}
vc4_state->is_unity = (vc4_state->x_scaling[0] == VC4_SCALING_NONE &&
vc4_state->y_scaling[0] == VC4_SCALING_NONE &&
vc4_state->x_scaling[1] == VC4_SCALING_NONE &&
vc4_state->y_scaling[1] == VC4_SCALING_NONE);
/* No configuring scaling on the cursor plane, since it gets
non-vblank-synced updates, and scaling requires requires
LBM changes which have to be vblank-synced.
@ -672,7 +668,10 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
vc4_dlist_write(vc4_state, SCALER_CSC2_ITR_R_601_5);
}
if (!vc4_state->is_unity) {
if (vc4_state->x_scaling[0] != VC4_SCALING_NONE ||
vc4_state->x_scaling[1] != VC4_SCALING_NONE ||
vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
vc4_state->y_scaling[1] != VC4_SCALING_NONE) {
/* LBM Base Address. */
if (vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
vc4_state->y_scaling[1] != VC4_SCALING_NONE) {