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R-Car DU v4.20 regression fix

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Merge tag 'du-fixes-20181126' of git://linuxtv.org/pinchartl/media into drm-fixes

R-Car DU v4.20 regression fix

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8134504.ZSXK7gKU4H@avalon
This commit is contained in:
Dave Airlie 2018-11-29 09:56:29 +10:00
commit c5fbf9ebe0
1 changed files with 18 additions and 3 deletions
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21
drivers/gpu/drm/rcar-du/rcar_du_group.c
View File

@ -202,10 +202,25 @@ void rcar_du_group_put(struct rcar_du_group *rgrp)
static void __rcar_du_group_start_stop(struct rcar_du_group *rgrp, bool start)
{
struct rcar_du_crtc *rcrtc = &rgrp->dev->crtcs[rgrp->index * 2];
struct rcar_du_device *rcdu = rgrp->dev;
rcar_du_crtc_dsysr_clr_set(rcrtc, DSYSR_DRES | DSYSR_DEN,
start ? DSYSR_DEN : DSYSR_DRES);
/*
* Group start/stop is controlled by the DRES and DEN bits of DSYSR0
* for the first group and DSYSR2 for the second group. On most DU
* instances, this maps to the first CRTC of the group, and we can just
* use rcar_du_crtc_dsysr_clr_set() to access the correct DSYSR. On
* M3-N, however, DU2 doesn't exist, but DSYSR2 does. We thus need to
* access the register directly using group read/write.
*/
if (rcdu->info->channels_mask & BIT(rgrp->index * 2)) {
struct rcar_du_crtc *rcrtc = &rgrp->dev->crtcs[rgrp->index * 2];
rcar_du_crtc_dsysr_clr_set(rcrtc, DSYSR_DRES | DSYSR_DEN,
start ? DSYSR_DEN : DSYSR_DRES);
} else {
rcar_du_group_write(rgrp, DSYSR,
start ? DSYSR_DEN : DSYSR_DRES);
}
}
void rcar_du_group_start_stop(struct rcar_du_group *rgrp, bool start)