diff options
| author | Paul Kocialkowski <paul.kocialkowski@bootlin.com> | 2018-11-23 10:24:33 +0100 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2018-11-27 09:30:42 +0100 |
| commit | 686d263856a9d5e1b3f66c7795308af9e8e20d96 (patch) | |
| tree | cbb6adbfb2ad828a658da3922548daa043d979fd /drivers/gpu/drm/sun4i/sun4i_backend.c | |
| parent | a42facc82c3d5841987b8b363a8a5cc564915c3c (diff) | |
drm/sun4i: Cleanup video/YUV source before enabling a layer
This adds a dedicated function for cleaning the video and YUV source
channel layer enable bits. This function is called first on layer atomic
update to make sure that there are no leftover bits from previous
plane configuration that were not cleaned until now.
It fixes issues when alternating between video and YUV planes, where
both bits would be set eventually, leading to broken plane display.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181123092515.2511-2-paul.kocialkowski@bootlin.com
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_backend.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_backend.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c index bf49c55b0f2c..67b4bb4f5365 100644 --- a/drivers/gpu/drm/sun4i/sun4i_backend.c +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c @@ -395,6 +395,15 @@ int sun4i_backend_update_layer_zpos(struct sun4i_backend *backend, int layer, return 0; } +void sun4i_backend_cleanup_layer(struct sun4i_backend *backend, + int layer) +{ + regmap_update_bits(backend->engine.regs, + SUN4I_BACKEND_ATTCTL_REG0(layer), + SUN4I_BACKEND_ATTCTL_REG0_LAY_VDOEN | + SUN4I_BACKEND_ATTCTL_REG0_LAY_YUVEN, 0); +} + static bool sun4i_backend_plane_uses_scaler(struct drm_plane_state *state) { u16 src_h = state->src_h >> 16; |