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drm/armada: fix crtc interlace 

We support interlace, but this was broken when we could no longer get
a ref on the vblank interrupt.  Arrange to get the ref on the vblank
interrupt after we've re-enabled vblank, and put it before we disable
the vblank.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King 2019-01-25 09:47:05 +00:00
parent e93c9c99a6
commit 768f719ab7
1 changed files with 7 additions and 8 deletions
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15
drivers/gpu/drm/armada/armada_crtc.c
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@ -278,16 +278,9 @@ static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
armada_reg_queue_set(regs, i, sclk, LCD_CFG_SCLK_DIV);
if (interlaced ^ dcrtc->interlaced) {
if (adj->flags & DRM_MODE_FLAG_INTERLACE)
drm_crtc_vblank_get(&dcrtc->crtc);
else
drm_crtc_vblank_put(&dcrtc->crtc);
dcrtc->interlaced = interlaced;
}
spin_lock_irqsave(&dcrtc->irq_lock, flags);
dcrtc->interlaced = interlaced;
/* Even interlaced/progressive frame */
dcrtc->v[1].spu_v_h_total = adj->crtc_vtotal << 16 |
adj->crtc_htotal;
@ -390,6 +383,9 @@ static void armada_drm_crtc_atomic_disable(struct drm_crtc *crtc,
DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
if (old_state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
drm_crtc_vblank_put(crtc);
drm_crtc_vblank_off(crtc);
armada_drm_crtc_update(dcrtc, false);
@ -434,6 +430,9 @@ static void armada_drm_crtc_atomic_enable(struct drm_crtc *crtc,
armada_drm_crtc_update(dcrtc, true);
drm_crtc_vblank_on(crtc);
if (crtc->state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
WARN_ON(drm_crtc_vblank_get(crtc));
armada_drm_crtc_queue_state_event(crtc);
}