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drm: rcar-du: Use the VBK interrupt for vblank events

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commit cbbb90b0c0 upstream.

When implementing support for interlaced modes, the driver switched from
reporting vblank events on the vertical blanking (VBK) interrupt to the
frame end interrupt (FRM). This incorrectly divided the reported refresh
rate by two. Fix it by moving back to the VBK interrupt.

Fixes: 906eff7fca ("drm: rcar-du: Implement support for interlaced modes")
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: thongsyho <thong.ho.px@rvc.renesas.com>
Signed-off-by: Nhan Nguyen <nhan.nguyen.yb@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Laurent Pinchart
2017-07-10 23:46:39 +03:00
committed by Greg Kroah-Hartman
parent 1cb145c672
commit 758e22acf4
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/rcar-du/rcar_du_crtc.c
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@@ -551,7 +551,7 @@ static irqreturn_t rcar_du_crtc_irq(int irq, void *arg)
status = rcar_du_crtc_read(rcrtc, DSSR);
rcar_du_crtc_write(rcrtc, DSRCR, status & DSRCR_MASK);
if (status & DSSR_FRM) {
if (status & DSSR_VBK) {
drm_crtc_handle_vblank(&rcrtc->crtc);
rcar_du_crtc_finish_page_flip(rcrtc);
ret = IRQ_HANDLED;