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drm/imx: ipuv3-plane: Configure DMFC wait4eot bit after slots are determined
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>
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1 changed files with 2 additions and 2 deletions
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@ -280,8 +280,6 @@ int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc,
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}
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}
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ipu_dmfc_config_wait4eot(ipu_plane->dmfc, crtc_w);
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ret = ipu_dmfc_alloc_bandwidth(ipu_plane->dmfc,
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calc_bandwidth(crtc_w, crtc_h,
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calc_vref(mode)), 64);
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@ -290,6 +288,8 @@ int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc,
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return ret;
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}
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ipu_dmfc_config_wait4eot(ipu_plane->dmfc, crtc_w);
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ipu_cpmem_zero(ipu_plane->ipu_ch);
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ipu_cpmem_set_resolution(ipu_plane->ipu_ch, src_w, src_h);
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ret = ipu_cpmem_set_fmt(ipu_plane->ipu_ch, fb->pixel_format);
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