redonkable/alistair23-linux
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drm/imx: ipuv3-plane: Configure DMFC wait4eot bit after slots are determined

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Just as the function ipu_dmfc_config_wait4eot() tells, the DMFC wait4eot bit
depends on the number of DMFC slots to be used, so it should be called after
the slots are determined in the function ipu_dmfc_alloc_bandwidth().
Based on tests, this patch may eliminate display distortion issue on overlay
plane with small resolutions.  To reproduce the issue, we may run this drm
modetest case - 'modetest -P 19:64x64'.

Signed-off-by: Liu Ying <gnuiyl@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Liu Ying 2016-03-14 16:10:11 +08:00 committed by Philipp Zabel
parent 27630c206b
commit 6bcaf0c581
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/imx/ipuv3-plane.c
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@ -280,8 +280,6 @@ int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc,
}
}
ipu_dmfc_config_wait4eot(ipu_plane->dmfc, crtc_w);
ret = ipu_dmfc_alloc_bandwidth(ipu_plane->dmfc,
calc_bandwidth(crtc_w, crtc_h,
calc_vref(mode)), 64);
@ -290,6 +288,8 @@ int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc,
return ret;
}
ipu_dmfc_config_wait4eot(ipu_plane->dmfc, crtc_w);
ipu_cpmem_zero(ipu_plane->ipu_ch);
ipu_cpmem_set_resolution(ipu_plane->ipu_ch, src_w, src_h);
ret = ipu_cpmem_set_fmt(ipu_plane->ipu_ch, fb->pixel_format);