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| author | Boris Brezillon <boris.brezillon@bootlin.com> | 2018-11-09 11:26:32 +0100 |
|---|---|---|
| committer | Hoegeun Kwon <hoegeun.kwon@samsung.com> | 2019-04-09 16:29:03 +0900 |
| commit | 78947467a6814a654f4ed8ce1032eb388c64f1b3 (patch) | |
| tree | 099b1b771318d16f95bed1a3f35983e98610968f | |
| parent | 85973109c48f8d90d5b74248cf5454edf906e746 (diff) | |
| download | linux-rpi3-78947467a6814a654f4ed8ce1032eb388c64f1b3.tar.gz linux-rpi3-78947467a6814a654f4ed8ce1032eb388c64f1b3.tar.bz2 linux-rpi3-78947467a6814a654f4ed8ce1032eb388c64f1b3.zip | |
drm/vc4: ->x_scaling[1] should never be set to VC4_SCALING_NONEsubmit/tizen/20190409.091246accepted/tizen/unified/20190410.061806
For the YUV conversion to work properly, ->x_scaling[1] should never
be set to VC4_SCALING_NONE, but vc4_get_scaling_mode() might return
VC4_SCALING_NONE if the horizontal scaling ratio exactly matches the
horizontal subsampling factor. Add a test to turn VC4_SCALING_NONE
into VC4_SCALING_PPF when that happens.
The old ->x_scaling[0] adjustment is dropped as I couldn't find any
mention to this constraint in the spec and it's proven to be
unnecessary (I tested various multi-planar YUV formats with scaling
disabled, and all of them worked fine without this adjustment).
Fixes: fc04023fafec ("drm/vc4: Add support for YUV planes.")
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181109102633.32603-1-boris.brezillon@bootlin.com
[hoegeun.kwon: cherry-pick mainline commit 0560054da5673
to fix the problem when none scaling of YUV format.]
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Change-Id: I40abf400a6f5ed54c9f4940587a694175e589104
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_plane.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c index 0d2b01ab7573..345db21a79ef 100644 --- a/drivers/gpu/drm/vc4/vc4_plane.c +++ b/drivers/gpu/drm/vc4/vc4_plane.c @@ -315,12 +315,14 @@ 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 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. + /* YUV conversion requires that horizontal scaling be enabled + * on the UV plane even if vc4_get_scaling_mode() returned + * VC4_SCALING_NONE (which can happen when the down-scaling + * ratio is 0.5). Let's force it to VC4_SCALING_PPF in this + * case. */ - if (vc4_state->is_unity) - vc4_state->x_scaling[0] = VC4_SCALING_PPF; + if (vc4_state->x_scaling[1] == VC4_SCALING_NONE) + vc4_state->x_scaling[1] = VC4_SCALING_PPF; } else { vc4_state->is_yuv = false; vc4_state->x_scaling[1] = VC4_SCALING_NONE; |